JPH11352051A - Device and method for inspecting corrosion surface - Google Patents
Device and method for inspecting corrosion surfaceInfo
- Publication number
- JPH11352051A JPH11352051A JP10161754A JP16175498A JPH11352051A JP H11352051 A JPH11352051 A JP H11352051A JP 10161754 A JP10161754 A JP 10161754A JP 16175498 A JP16175498 A JP 16175498A JP H11352051 A JPH11352051 A JP H11352051A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- rust
- rust removing
- container
- surface inspection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、原子力プラントの
冷却水接液部の材料に発生する表面損傷状態や破面形態
を検査する方法に関する。また、原子力プラント以外に
おいても同様の環境において使用される部材の表面損傷
状態や破面形態を検査する方法としても適要できる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting a surface damage state and a fracture mode generated in a material of a cooling water contact part of a nuclear power plant. In addition, the present invention can be applied to a method for inspecting a surface damage state and a fracture mode of a member used in a similar environment other than a nuclear power plant.
【０００２】[0002]
【従来の技術】これまでに用いられている原子力プラン
トの表面損傷検査方法は比較的巨視的なき裂状欠陥の検
査が対象であった。これまでの検査方法は例えば（株）
リアライズ社発行，「火力・原子力および化学プラント
機器・構造部材の経年劣化と寿命予測」（平成６年４月
発行）３７６頁にまとめられているが、表面の微細な腐
食状態や微視き裂の発生状態を検査する方法は適用され
ていない。2. Description of the Related Art Conventionally, a method for inspecting the surface damage of a nuclear power plant has been aimed at inspecting a relatively macroscopic crack-like defect. The conventional inspection method is, for example,
Published by Realize Inc., "Aging and Deterioration of Thermal and Nuclear Power Plants and Chemical Plant Equipment and Structural Members" (published in April, 1994), page 376. The method of checking the state of occurrence is not applied.
【０００３】[0003]
【発明が解決しようとする課題】プラントの構造部材の
接液部に発生する損傷は、腐食損傷の発生，腐食損傷か
らの微視き裂の発生，微視き裂の成長，巨視き裂の形
成，巨視き裂の成長の経過をたどる。プラント健全性を
調べるために材料表面の検査が行われるが、損傷の初期
の状態を検査して把握することができれば、プラントの
損傷を早期に検出することが可能となり、健全性のさら
なる向上につながる。そのため、プラントの構造部材の
腐食損傷の発生，腐食損傷からの微視き裂の発生を検査
する方法が求められていた。特に、フェライト系の材料
で作られている構造部材は、高温水環境で使用されると
表面が腐食生成物に覆われてしまい、微細な損傷を検出
することが困難であった。The damage that occurs in the wetted parts of the structural members of the plant includes the occurrence of corrosion damage, the generation of microcracks from corrosion damage, the growth of microcracks, and the occurrence of macrocracks. Follow the course of formation and growth of macrocracks. Inspection of the material surface is performed to check the health of the plant, but if the initial state of damage can be inspected and grasped, damage to the plant can be detected at an early stage, further improving the soundness. Connect. Therefore, there has been a demand for a method for inspecting the occurrence of corrosion damage to structural members of a plant and the occurrence of microscopic cracks due to corrosion damage. In particular, when a structural member made of a ferrite-based material is used in a high-temperature water environment, the surface is covered with corrosion products, and it has been difficult to detect minute damage.
【０００４】[0004]
【課題を解決するための手段】上記従来技術の課題を解
決するために、構造部材表面の腐食生成物の除去すなわ
ち除錆をするための除錆室形成容器を提供する。また除
錆室形成容器を構造部材の表面に固定できるように、除
錆室形成容器にマグネットを取り付ける。また、除錆液
と洗浄液の貯蔵タンクを提供し、それぞれの液と除錆室
形成容器との間を管状部材で連結し、それぞれの液の貯
蔵タンクと管状部材の中間にバルブを設ける。また、同
管状部材の中間に液供給用ポンプを設ける。また、液供
給用のポンプと除錆室形成容器の中間の管状部材に液を
加熱するためのヒーターを設け、ヒーターに電流を供給
するためのヒーター加熱電源を設ける。In order to solve the above-mentioned problems of the prior art, a container for forming a rust removing chamber for removing corrosion products on the surface of a structural member, that is, for removing rust is provided. Further, a magnet is attached to the rust removing chamber forming container so that the rust removing chamber forming container can be fixed to the surface of the structural member. In addition, a storage tank for the rust removing liquid and the cleaning liquid is provided, and the respective liquid and the rust removing chamber forming container are connected by a tubular member, and a valve is provided between the storage tank for the respective liquid and the tubular member. A liquid supply pump is provided in the middle of the tubular member. Further, a heater for heating the liquid is provided in a tubular member between the pump for supplying the liquid and the container for forming the rust removing chamber, and a heater heating power supply for supplying a current to the heater is provided.
【０００５】また、ヒーターで加熱された除錆液を除錆
室形成容器に供給するかバイパスするかを選択するため
の液供給バルブと液バイパスバルブを設け、液供給バル
ブを開とした時には除錆室形成容器に除錆液を供給でき
るように、また液バイパスバルブを開とした時には液を
除錆室形成容器に供給せずバイパスできるように管を構
成する。また、廃液を貯溜するための廃液タンクを設け
る。また、液バイパスバルブを通過して廃液貯溜タンク
向かう除錆液の温度を測定できる温度測定装置を設け
る。Further, a liquid supply valve and a liquid bypass valve for selecting whether to supply or bypass the rust removing liquid heated by the heater to the container for forming the rust removing chamber are provided. The pipe is formed so that the rust removing liquid can be supplied to the rust chamber forming container, and can be bypassed without supplying the liquid to the rust removing chamber forming container when the liquid bypass valve is opened. In addition, a waste liquid tank for storing the waste liquid is provided. In addition, a temperature measuring device capable of measuring the temperature of the rust removing liquid passing through the liquid bypass valve toward the waste liquid storage tank is provided.
【０００６】また、効率よく除錆が行われるように、除
錆室形成容器内にブラシを設置し、ブラシを回転させる
ことができるように除錆室形成容器外にモーターを設置
する。また、除錆室形成容器にレプリカ素材を供給する
ための管と供給装置を設ける。また、除錆液供給バル
ブ，洗浄液供給バルブ，液供給用バルブ，液導入バル
ブ，液バイパスバルブ，ヒーター加熱電源，ブラシ状部
材回転モーター，温度測定装置，除錆室形成装置固定用
マグネットを一括して制御する制御装置を設ける。即
ち、本発明の作用を図１及び図２を用いて説明する。は
じめに樹脂状の比較的軟質な物質で作られた除錆室形成
容器１を検査対象部材表面５０に設置する。このとき、
除錆室形成容器１に取り付けられた除錆室形成装置固定
用電磁マグネット２で除錆室形成装置を構造物の表面に
固定する。除錆液貯溜タンク３内に貯溜された除錆液を
除錆液供給バルブ４を通して、液供給ポンプ５で液供給
管６，液バイパスバルブ７を経由して廃液貯溜タンク８
に導入する。このとき逆止バルブ１８が設けられている
ために、除錆液が除錆室形成容器１内に流れ込むことが
ない。In addition, a brush is installed in a container for forming a rust removing chamber so that rust is efficiently removed, and a motor is installed outside the container for forming a rust removing chamber so that the brush can be rotated. In addition, a pipe and a supply device for supplying the replica material to the container for forming the rust removing chamber are provided. In addition, a rust removing liquid supply valve, a cleaning liquid supply valve, a liquid supply valve, a liquid introduction valve, a liquid bypass valve, a heater heating power supply, a brush member rotating motor, a temperature measuring device, and a rust removing chamber forming device fixing magnet are collectively provided. A control device is provided for control. That is, the operation of the present invention will be described with reference to FIGS. First, the rust-removing chamber forming container 1 made of a relatively soft resinous substance is placed on the surface 50 of a member to be inspected. At this time,
The rust removing chamber forming device is fixed to the surface of the structure by the rust removing chamber forming device fixing electromagnetic magnet 2 attached to the rust removing chamber forming container 1. The rust removing liquid stored in the rust removing liquid storage tank 3 is passed through a rust removing liquid supply valve 4, a liquid supply pump 5, a liquid supply pipe 6, a liquid bypass valve 7, and a waste liquid storage tank 8.
To be introduced. At this time, since the check valve 18 is provided, the rust removing liquid does not flow into the rust removing chamber forming container 1.
【０００７】このとき、液バイパスバルブ７の後方に設
置された温度測定装置９で除錆液の温度を測定し、その
温度が所定の値になるように、液供給ポンプ５と液バイ
パスバルブ７の間にある液供給管６に取り付けたヒータ
ー１０をヒーター加熱電源１１の制御により適当な電流
で加熱する。温度測定装置９で測定される温度が所定の
温度となったときに液供給バルブ１２を開とし、液バイ
パスバルブ７を閉にすることによって除錆室形成容器１
に所定の温度の除錆液を供給することができる。At this time, the temperature of the rust removing liquid is measured by a temperature measuring device 9 installed behind the liquid bypass valve 7, and the liquid supply pump 5 and the liquid bypass valve 7 are adjusted so that the temperature becomes a predetermined value. The heater 10 attached to the liquid supply pipe 6 located between them is heated by an appropriate current under the control of the heater heating power supply 11. When the temperature measured by the temperature measuring device 9 reaches a predetermined temperature, the liquid supply valve 12 is opened, and the liquid bypass valve 7 is closed, so that the rust removing chamber forming container 1 is opened.
Can be supplied with a rust removing liquid at a predetermined temperature.
【０００８】ブラシ固定シャフト１３の先端に取り付け
た回転ブラシ１４をモーター１５で回転することによ
り、検査対象表面でブラシでこすりながら、効率よく除
錆を行うことができる。除錆室形成容器１をブラシ固定
シャフト１３が貫通する部位には、除錆室形成容器１内
の除錆液や洗浄液が外部に漏出しないようにシール１９
が設けてある。除錆室形成容器１内に供給された除錆液
は逆止バルブ１８を通って廃液貯溜タンクに貯溜され
る。By rotating the rotary brush 14 attached to the tip of the brush fixing shaft 13 by the motor 15, rust can be efficiently removed while rubbing the surface to be inspected with the brush. A seal 19 is provided at a portion where the brush fixing shaft 13 penetrates the rust removing chamber forming container 1 so that the rust removing liquid and the cleaning liquid in the rust removing chamber forming container 1 do not leak outside.
Is provided. The rust removing liquid supplied into the rust removing chamber forming container 1 passes through the check valve 18 and is stored in the waste liquid storage tank.
【０００９】あらかじめ決めておいた除錆施工時間ｔd
が経過したら、除錆液供給バルブ４を閉とし洗浄液供給
バルブ１７を開として、洗浄液貯溜タンク１６内の洗浄
液を常温のまま除錆室形成容器１内に供給する。洗浄液
は逆止バルブ１８を通って廃液貯溜タンク８に貯溜され
る。十分に洗浄がなされたと判断される時間が経過した
ら、洗浄液供給バルブ１７を閉にするとともに、液供給
ポンプ５を停止して、洗浄液の供給を止める。[0009] Rust removal work time t d determined in advance
After the time elapses, the rust removing liquid supply valve 4 is closed and the cleaning liquid supply valve 17 is opened to supply the cleaning liquid in the cleaning liquid storage tank 16 into the rust removing chamber forming container 1 at room temperature. The cleaning liquid is stored in the waste liquid storage tank 8 through the check valve 18. After a lapse of time when it is determined that the cleaning has been sufficiently performed, the cleaning liquid supply valve 17 is closed, and the liquid supply pump 5 is stopped to stop the supply of the cleaning liquid.
【００１０】次にブラシ固定シャフト１３を上方に移動
させ、回転ブラシ１４を検査対象部材表面５０から離
す。次に、レプリカ素材貯溜容器２０内のレプリカ素材
をピストン２１で押し出し、レプリカ素材供給管２２を
経由して除錆室形成容器１内にレプリカ素材を供給す
る。レプリカ素材は除錆室形成容器１の内部に充満し、
所定時間経過すると固まる。このとき、検査対象部材表
面５０に接していたレプリカ素材には、検査対象部材表
面５０の損傷形態が転写されている。Next, the brush fixing shaft 13 is moved upward to separate the rotating brush 14 from the surface 50 of the member to be inspected. Next, the replica material in the replica material storage container 20 is pushed out by the piston 21, and the replica material is supplied into the rust removing chamber forming container 1 via the replica material supply pipe 22. The replica material fills the inside of the rust-removing chamber forming container 1,
It hardens after a predetermined time. At this time, the damage form of the inspection target member surface 50 is transferred to the replica material that has been in contact with the inspection target member surface 50.
【００１１】電磁マグネット２への電気の供給を停止
し、除錆室形成容器１を外部に取り外すと固まったレプ
リカ素材は共に、外部に取り出される。取り出されたレ
プリカ素材を観察することにより、検査対象部材表面５
０の損傷状態を検査することができる。さらに、除錆液
供給バルブ４，洗浄液供給バルブ１７，液供給用ポンプ
５，液導入バルブ１２，液バイパスバルブ７，ヒーター
加熱電源１１，モーター１５，温度測定装置９，除錆室
形成装置固定用電磁マグネット２を一括して制御する制
御装置８により、検査対象表面の除錆を一括して行うこ
とができる。When the supply of electricity to the electromagnetic magnet 2 is stopped and the rust removing chamber forming container 1 is removed to the outside, the solidified replica material is taken out together. By observing the extracted replica material, the inspection target member surface 5
0 damage states can be checked. Further, a rust removing liquid supply valve 4, a cleaning liquid supply valve 17, a liquid supply pump 5, a liquid introduction valve 12, a liquid bypass valve 7, a heater heating power supply 11, a motor 15, a temperature measuring device 9, and a fixing device for forming a rust removing chamber. By the control device 8 which controls the electromagnetic magnet 2 collectively, rust removal on the surface to be inspected can be performed collectively.
【００１２】除錆施工時間ｔd(ｓ）は、検査対象部材が
２００℃以上の水中にさらされていた時間ｔi(ｓ）に基
づいて決定する。除錆液としてりん酸、または塩酸＋ヘ
キサメチレンテトラミンを使用した場合の除錆時間を図
３に示す。除錆液の設定温度はりん酸に対して、５０℃
〜７０℃、塩酸＋ヘキサメチレンテトラミンに対して、
４０℃〜６０℃とし、次式の最短除錆時間決定式６０と
最長除錆時間決定式６１とを用いて、その間を適当な除
錆時間として除錆時間範囲６２を決定する。この範囲で
除錆を行えば、環境中の応力腐食割れ現象や腐食疲労現
象に影響するといわれる硫化マンガン（ＭｎＳ）介在物
を除錆処理中に溶解させることなく、また、金属の表面
を溶解させることなく適切に錆を落とすことができる。The rust removal time t d (s) is determined based on the time t i (s) during which the inspection target member was exposed to water at 200 ° C. or higher. FIG. 3 shows the rust removing time when phosphoric acid or hydrochloric acid + hexamethylenetetramine is used as the rust removing solution. The set temperature of the rust remover is 50 ° C for phosphoric acid.
~ 70 ° C, hydrochloric acid + hexamethylenetetramine
The temperature is set to 40 ° C. to 60 ° C., and the rust removal time range 62 is determined using the shortest rust removal time determination equation 60 and the longest rust removal time determination equation 61 as the appropriate rust removal time. If rust removal is performed within this range, manganese sulfide (MnS) inclusions, which are said to affect the stress corrosion cracking phenomenon and corrosion fatigue phenomenon in the environment, will not be dissolved during the rust removal treatment, and the metal surface will be dissolved. Rust can be properly removed without causing rust.
【００１３】[0013]
【発明の実施の形態】図４を用いて本発明の実施例を説
明する。圧力容器７０に冷却水を供給するための冷却水
供給配管７２はノズル７１に接続されている。ノズル７
１の接液面７４は腐食環境にあるとともに温度変動を受
るという厳しい環境にあることから、比較的腐食損傷を
発生しやすい部位である。そのため、接液面７４の検査
を行う必要性が出てくることが予想される。本発明によ
る腐食表面検査装置を用いて接液面７４を検査するため
に、冷却水供給配管７２の切断部位７３を切断する。切
断部位７３から除錆室形成容器１及びそれに接続されて
いる周辺の部品一式をノズル７１の内部に挿入する。検
査対象部位に除錆室形成容器１を押し付け、制御装置８
の制御に従って除錆室形成装置固定用電磁マグネット２
に磁力を発生させて、除錆室形成容器１を検査対象部位
にしっかりと固定する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. A cooling water supply pipe 72 for supplying cooling water to the pressure vessel 70 is connected to the nozzle 71. Nozzle 7
The first liquid contact surface 74 is in a corrosive environment and in a severe environment that is subject to temperature fluctuations, and thus is a part where corrosion damage is relatively likely to occur. Therefore, it is expected that the liquid contact surface 74 needs to be inspected. In order to inspect the liquid contact surface 74 using the corrosion surface inspection device according to the present invention, the cutting portion 73 of the cooling water supply pipe 72 is cut. The rust removal chamber forming container 1 and a set of peripheral components connected to the container 1 are inserted into the nozzle 71 from the cutting portion 73. The rust removing chamber forming container 1 is pressed against the inspection target portion, and the control device 8
Magnet 2 for fixing the rust removal chamber forming device according to the control of
To generate a magnetic force to securely fix the rust-removing chamber forming container 1 to the inspection target site.
【００１４】除錆液貯溜タンク３内に貯溜された除錆液
であるりん酸または塩酸＋ヘキサメチレンテトラミンを
除錆液供給バルブ４を通して液供給ポンプ５で液供給管
６，液バイパスバルブ７を経由して廃液貯溜タンク８に
導入する。このとき逆止バルブ１８が設けられているた
めに除錆液が除錆室形成容器１内に流れ込むことがな
い。このとき、液バイパスバルブ７の後方に設置された
温度測定装置９、例えば熱電対で除錆液の温度を測定す
る。測定された温度が除錆液がりん酸の場合には５０
℃、除錆液が塩酸＋ヘキサメチレンテトラミンの場合に
は４０℃に達するまで、ヒーター１０をヒーター加熱電
源１１を用いて加熱することにより供給中の除錆液を加
熱する。The rust-removing liquid phosphoric acid or hydrochloric acid + hexamethylenetetramine stored in the rust-removing liquid storage tank 3 is passed through a rust-removing liquid supply valve 4 by a liquid supply pump 5 to a liquid supply pipe 6 and a liquid bypass valve 7. It is introduced into the waste liquid storage tank 8 via At this time, since the check valve 18 is provided, the rust removing liquid does not flow into the rust removing chamber forming container 1. At this time, the temperature of the rust removing liquid is measured by a temperature measuring device 9 installed behind the liquid bypass valve 7, for example, a thermocouple. The measured temperature is 50 when the rust removing liquid is phosphoric acid.
When the rust removing solution is hydrochloric acid + hexamethylenetetramine, the heater 10 is heated using the heater heating power supply 11 until the rust removing solution reaches 40 ° C. to heat the rust removing solution being supplied.
【００１５】測定された温度が、除錆液がりん酸の場合
には５０℃、除錆液が塩酸＋ヘキサメチレンテトラミン
の場合には４０℃に達したら、ヒーター加熱電源１１を
停止してヒーター１０の加熱を停止し、液供給バルブ１
２を開とし、液バイパスバルブ７を閉にすることによっ
て除錆室形成容器１に所定の温度の除錆液を供給する。When the measured temperature reaches 50 ° C. when the rust removing solution is phosphoric acid and reaches 40 ° C. when the rust removing solution is hydrochloric acid + hexamethylenetetramine, the heater heating power supply 11 is stopped and the heater is turned off. 10 is stopped and the liquid supply valve 1 is stopped.
2 is opened and the liquid bypass valve 7 is closed to supply a rust removing liquid at a predetermined temperature to the rust removing chamber forming container 1.
【００１６】このとき、ブラシ固定シャフト１３の先端
に取り付けた回転ブラシ１４をモーター１５で回転する
ことにより、検査対象表面をブラシでこすりながら効率
よく除錆を行う。除錆室形成容器１をブラシ固定シャフ
ト１３が貫通する部位には、除錆室形成容器１内の除錆
液や洗浄液が外部に漏出しないようにシール１９が設け
てある。除錆室形成容器１内に供給された除錆液は逆止
バルブ１８を通って廃液貯溜タンクに貯溜される。At this time, the rotating brush 14 attached to the tip of the brush fixing shaft 13 is rotated by the motor 15, so that the surface to be inspected is rubbed efficiently with a brush. A seal 19 is provided at a portion where the brush fixing shaft 13 penetrates the rust removing chamber forming container 1 so that the rust removing liquid and the cleaning liquid in the rust removing chamber forming container 1 do not leak outside. The rust removing liquid supplied into the rust removing chamber forming container 1 passes through the check valve 18 and is stored in the waste liquid storage tank.
【００１７】除錆中に温度測定装置９で測定された温度
が除錆液がりん酸の場合には５０℃〜７０℃、除錆液が
塩酸＋ヘキサメチレンテトラミンの場合には４０℃〜６
０℃の設定温度範囲よりも低い場合には、ヒーター１０
をヒーター加熱電源１１を用いて加熱することにより供
給中の除錆液を加熱する。測定された温度が設定温度範
囲内であるかあるいはそれ以上の場合には、ヒーター加
熱電源１１を停止してヒーター１０の加熱を停止する。
除錆施工時間は除錆液の供給時間ｔd(ｓ）で決定され
る。検査対象部位への除錆液の供給時間ｔi(ｓ）は、検
査対象部位が冷却水環境に２００℃以上の温度で置かれ
ていた累積時間ｔi(ｓ）を別途調べておき、次式で決定
する。The temperature measured by the temperature measuring device 9 during rust removal is 50 ° C. to 70 ° C. when the rust removing solution is phosphoric acid, and 40 ° C. to 6 ° C. when the rust removing solution is hydrochloric acid + hexamethylenetetramine.
If the temperature is lower than the set temperature range of 0 ° C., the heater 10
Is heated using a heater heating power supply 11 to heat the rust removing liquid being supplied. When the measured temperature is within the set temperature range or higher, the heater heating power supply 11 is stopped and the heating of the heater 10 is stopped.
The rust removing time is determined by the rust removing liquid supply time t d (s). The supply time t i (s) of the rust-removing solution to the inspection target is separately determined from the cumulative time t i (s) during which the inspection target is placed in the cooling water environment at a temperature of 200 ° C. or more. Determined by the formula.
【００１８】[0018]
【数２】{log(ｔi＋３６００)＋３}2＜ｔd＜{log(ｔi＋
３６００)＋３}2＋６０，(ｓ) 除錆施工時間ｔd が経過したら除錆液供給バルブ４を閉
とし洗浄液供給バルブ１７を開として洗浄液貯溜タンク
１６内の洗浄液を常温のまま除錆室形成容器１内に供給
する。洗浄液は逆止バルブ１８を通って廃液貯溜タンク
８に貯溜される。除錆室形成容器１の内部の洗浄液が３
回交換される量に相当する洗浄液量を供給したら、洗浄
液供給バルブ１７を閉にするとともに、液供給ポンプ５
を停止して、洗浄液の供給を止める。## EQU2 ## {log (t i +3600) +3} 2 <t d <{log (t i +
3600) +3} 2 +60, (s) When the rust removal execution time t d has elapsed, the rust removal liquid supply valve 4 is closed, and the cleaning liquid supply valve 17 is opened, and the cleaning liquid in the cleaning liquid storage tank 16 is kept at room temperature to form a rust removing chamber. Supply in container 1. The cleaning liquid is stored in the waste liquid storage tank 8 through the check valve 18. The cleaning liquid inside the rust removing chamber forming container 1 is 3
After supplying the cleaning liquid amount corresponding to the number of times of replacement, the cleaning liquid supply valve 17 is closed and the liquid supply pump 5
Is stopped, and the supply of the cleaning liquid is stopped.
【００１９】次にブラシ固定シャフト１３を上方に移動
させ、回転ブラシ１４を接液面７４から離す。次に、レ
プリカ素材貯溜容器２０内のレプリカ素材、例えばアセ
チルセルロースの溶融液をピストン２１で押し出し、レ
プリカ素材供給管２２を経由して除錆室形成容器１内に
レプリカ素材を供給する。レプリカ素材が除錆室形成容
器１の内部に充満したのち、十分に固まるまで保持す
る。このとき、接液面７４に接していたレプリカ素材に
は、接液面７４の損傷形態が転写されている。除錆室形
成装置固定用電磁マグネット２への電気の供給を停止
し、除錆室形成容器１を、固まったレプリカ素材と共に
外部に取り出す。検査終了後には、切断部位７３を溶接
によって接合する。Next, the brush fixing shaft 13 is moved upward, and the rotating brush 14 is separated from the liquid contact surface 74. Next, a replica material in the replica material storage container 20, for example, a melt of acetylcellulose is extruded by the piston 21, and the replica material is supplied into the rust removing chamber forming container 1 via the replica material supply pipe 22. After the replica material fills the inside of the rust removing chamber forming container 1, it is held until it is sufficiently hardened. At this time, the damage form of the liquid contact surface 74 is transferred to the replica material that has been in contact with the liquid contact surface 74. The supply of electricity to the rust removing chamber forming apparatus fixing electromagnetic magnet 2 is stopped, and the rust removing chamber forming container 1 is taken out together with the solidified replica material. After the inspection, the cut portion 73 is joined by welding.
【００２０】次に、取り出されたレプリカ素材を観察す
ることにより、接液面７４を検査し、プラントの健全性
の評価を行う。検査方法を図５，図６に示す。取り出さ
れたレプリカ８５を顕微鏡８６で観察する。顕微鏡８６
で観察した画像のデータは、画像処理機能付きコンピュ
ータ８７に取り込む。観察画像８０には例えば腐食ピッ
ト８１が観察される。画像処理機能付きコンピュータ８
７を用いて、観察画像８０を解析し、解析結果８８を出
力する。解析結果８８には、腐食ピット密度，最大腐食
ピット深さ，最大腐食ピット幅等の解析データが含まれ
る。ここで、最大腐食ピット深さを求めるには、例えば
ステレオ観察法が利用される。Next, by observing the taken-out replica material, the liquid contact surface 74 is inspected to evaluate the soundness of the plant. The inspection method is shown in FIGS. The taken-out replica 85 is observed with a microscope 86. Microscope 86
The data of the image observed in step is taken into the computer 87 with the image processing function. In the observation image 80, for example, a corrosion pit 81 is observed. Computer with image processing function 8
7, the observation image 80 is analyzed, and an analysis result 88 is output. The analysis result 88 includes analysis data such as a corrosion pit density, a maximum corrosion pit depth, and a maximum corrosion pit width. Here, in order to obtain the maximum corrosion pit depth, for example, a stereo observation method is used.
【００２１】図７，図８により、プラント健全性の評価
方法を説明する。例えば、プラント使用相当時間に対す
る腐食ピット密度の変化曲線９０や、プラント使用相当
時間に対する最大腐食ピット深さの変化曲線１００をあ
らかじめ実験等により求めておく。ここで、プラント使
用相当時間は、例えばプラントの最高使用温度に常時置
かれている場合の使用時間であり、プラント運転時間と
は必ずしも一致しない。そして、プラントの健全性に何
らかの関与のある損傷発生臨界に相当する臨界腐食ピッ
ト密度９１や臨界最大腐食ピット深さ１０１を、実験あ
るいは解析によって予め求めておく。臨界腐食ピット密
度９１に至るプラント使用相当時間、及び臨界最大腐食
ピット深さ１０１に至るプラント使用相当時間が、臨界
損傷発生時間９２に相当する。Referring to FIGS. 7 and 8, a method for evaluating plant soundness will be described. For example, a change curve 90 of the corrosion pit density with respect to the plant equivalent time and a change curve 100 of the maximum corrosion pit depth with respect to the plant equivalent time are obtained in advance by experiments or the like. Here, the plant use equivalent time is, for example, the use time when the plant is always kept at the maximum use temperature of the plant, and does not always coincide with the plant operation time. Then, the critical corrosion pit density 91 and the critical maximum corrosion pit depth 101 corresponding to the damage occurrence criticality that has some influence on the soundness of the plant are obtained in advance by experiments or analysis. The plant equivalent time to the critical corrosion pit density 91 and the plant equivalent time to the critical maximum corrosion pit depth 101 correspond to the critical damage occurrence time 92.
【００２２】一方、レプリカの観察により求められた現
状腐食ピット密度９３に対して、プラント使用相当時間
に対する腐食ピット密度の変化曲線９０を用いて現状の
プラント使用相当時間９４を求めることができる。ま
た、レプリカの観察により求められた現状最大腐食ピッ
ト深さ１０３に対して、プラント使用相当時間に対する
最大腐食ピット深さ変化曲線１００を用いて現状のプラ
ント使用相当時間９４を設けることができる。臨界損傷
発生時間９２と現状のプラント使用相当時間９４との差
が、臨界損傷が発生するまでの猶予期間９５に相当し、
この猶予期間が次回の検査までの期間よりも長ければ、
き裂状欠陥の検査を実施しなくても、プラントの健全性
は確保されると判断される。On the other hand, with respect to the current corrosion pit density 93 obtained by observing the replica, the current plant use equivalent time 94 can be obtained using the change curve 90 of the corrosion pit density with respect to the plant use equivalent time. Further, for the current maximum corrosion pit depth 103 obtained by observation of the replica, the current plant use equivalent time 94 can be provided using the maximum corrosion pit depth change curve 100 with respect to the plant use equivalent time. The difference between the critical damage occurrence time 92 and the current plant use equivalent time 94 corresponds to a grace period 95 until critical damage occurs,
If this grace period is longer than the period before the next test,
It is determined that the soundness of the plant can be maintained without conducting inspections for crack-like defects.
【００２３】[0023]
【発明の効果】本発明により、構造材料の接液部表面の
微小な腐食損傷を検知することができ、プラントの健全
性を適切に判断することができる。According to the present invention, it is possible to detect minute corrosion damage on the surface of the liquid-contact part of the structural material, and it is possible to appropriately judge the soundness of the plant.
【図１】本発明の実施例である腐食表面検査装置の作用
を説明する構成図である。FIG. 1 is a configuration diagram illustrating the operation of a corrosion surface inspection apparatus according to an embodiment of the present invention.
【図２】腐食表面検査装置が作用するフローを示す図で
ある。FIG. 2 is a diagram showing a flow in which the corrosion surface inspection device operates.
【図３】除錆処理時間の範囲を示す特性図である。FIG. 3 is a characteristic diagram showing a range of rust removal processing time.
【図４】腐食表面検査装置をプラントの検査に適用する
実施例を示す構成図である。FIG. 4 is a configuration diagram showing an embodiment in which the corrosion surface inspection device is applied to plant inspection.
【図５】腐食表面検査装置により採取されたレプリカの
観察例を示す図である。FIG. 5 is a diagram showing an example of observation of a replica collected by a corrosion surface inspection device.
【図６】腐食表面検査装置により採取されたレプリカの
観察方法を示す図である。FIG. 6 is a diagram showing a method of observing a replica collected by the corrosion surface inspection device.
【図７】プラントの健全評価方法を説明する特性図であ
る。FIG. 7 is a characteristic diagram illustrating a method for evaluating the soundness of a plant.
【図８】プラントの健全評価方法を説明する特性図であ
る。FIG. 8 is a characteristic diagram illustrating a method for evaluating the soundness of a plant.
１…除錆室形成容器、２…除錆室形成装置固定用電磁マ
グネット、３…除錆液貯溜タンク、４…除錆液供給バル
ブ、５…液供給ポンプ、６…液供給管、７…液バイパス
バルブ、８…廃液貯溜タンク、９…温度測定装置、１０
…ヒーター、１１…ヒーター加熱電源、１２…液供給バ
ルブ、１３…ブラシ固定シャフト、１４…回転ブラシ、
１５…モーター、１６…洗浄液貯溜タンク、１７…洗浄
液供給バルブ、１８…逆止バルブ、１９…シール、２０
…レプリカ素材貯溜容器、２１…ピストン、２２…レプ
リカ素材供給管、２３…制御装置、５０…検査対象部材
表面、６０…最短除錆時間決定式、６１…最長除錆時間
決定式、６２…除錆時間範囲、７０…圧力容器、７１…
ノズル、７２…冷却水供給配管、７３…切断部位、７４
…接液面、８０…観察画像、８１…腐食ピット、８５…
レプリカ、８６…顕微鏡、８７…画像処理機能付きコン
ピュータ、８８…解析結果、９０…プラント使用相当時
間に対する腐食ピット密度の変化曲線、９１…臨界腐食
ピット密度、９２…臨界損傷発生時間、９３…現状腐食
ピット密度、９４…現状のプラント使用相当時間、９５
…臨界損傷が発生するまでの猶予期間、１００…プラン
ト使用相当時間に対する最大腐食ピット深さの変化曲
線、１０１…臨界最大腐食ピット深さ、１０３…現状最
大腐食ピット深さ。REFERENCE SIGNS LIST 1 rust removing chamber forming container 2 rust removing chamber forming device fixing electromagnetic magnet 3 rust removing liquid storage tank 4 rust removing liquid supply valve 5 liquid supply pump 6 liquid supply pipe 7 Liquid bypass valve, 8: waste liquid storage tank, 9: temperature measuring device, 10
... heater, 11 ... heater heating power supply, 12 ... liquid supply valve, 13 ... brush fixed shaft, 14 ... rotating brush,
Reference numeral 15: motor, 16: cleaning liquid storage tank, 17: cleaning liquid supply valve, 18: check valve, 19: seal, 20
... Replica material storage container, 21 ... Piston, 22 ... Replica material supply pipe, 23 ... Control device, 50 ... Inspection target member surface, 60 ... Shortest rust removal time determination formula, 61 ... Longest rust removal time determination formula, 62 ... Removal Rust time range, 70 ... pressure vessel, 71 ...
Nozzle, 72: cooling water supply pipe, 73: cutting site, 74
... Wetted surface, 80 ... Observed image, 81 ... Corrosion pit, 85 ...
Replica, 86: Microscope, 87: Computer with image processing function, 88: Analysis result, 90: Change curve of corrosion pit density with respect to equivalent time of plant use, 91: Critical corrosion pit density, 92: Critical damage occurrence time, 93: Current state Corrosion pit density, 94 ... Current plant equivalent time, 95
... Grace period until critical damage occurs, 100 ... Curve of maximum corrosion pit depth with respect to plant use equivalent time, 101 ... Critical maximum corrosion pit depth, 103 ... Current maximum corrosion pit depth.
Claims (11)
部屋に液の供給部，液の排出部及び回転ブラシを設ける
ことにより、構造物表面の除錆処理を行うことができる
ようにした除錆室形成容器であることを特徴とする腐食
表面検査装置。1. A rust removing process can be performed on a surface of a structure by providing a room for rust removal on the surface of the structure and providing a liquid supply unit, a liquid discharge unit, and a rotating brush in the room. A corrosion surface inspection apparatus characterized in that it is a container for forming a rust removal chamber as described above.
浄室への除錆液の供給と除錆後の除錆液除去のための洗
浄液の供給を、バルブを切り替える除錆液及び洗浄液の
供給機構を有することを特徴とする腐食表面検査装置。2. The corrosion surface inspection apparatus according to claim 1, wherein the supply of the rust removing liquid to the cleaning chamber and the supply of the cleaning liquid for removing the rust removing liquid after rust removal are performed by switching valves. A corrosion surface inspection device having a supply mechanism.
液貯蔵タンクを設け除錆室形成容器を廃液貯蔵タンクを
液導出部材で連結し、除錆室形成容器内の除錆液及び洗
浄液を構造物の環境に排出することなしに排出できるよ
うにしたことを特徴とする腐食表面検査装置。3. A corrosion surface inspection apparatus according to claim 1, wherein a waste liquid storage tank is provided, the rust removing chamber forming container is connected to the waste liquid storing tank by a liquid lead-out member, and the rust removing liquid and the cleaning liquid in the rust removing chamber forming container are separated. Corrosion surface inspection device characterized by being able to discharge without discharging to the environment of the structure.
液及び洗浄液の供給機構において、バルブの切り替えに
よって除錆室形成容器を通さずに廃液系に直接除錆液を
送ることができるようにしたことを特徴とする腐食表面
検査装置。4. A rust removing liquid and a cleaning liquid supply mechanism in a corrosion surface inspection apparatus according to claim 2, wherein the rust removing liquid can be sent directly to a waste liquid system without passing through a rust removing chamber forming container by switching a valve. Corrosion surface inspection device characterized by the following.
おいて、給液用ポンプと除錆室形成容器との間を連絡し
ている液導入部材にヒーターを設け、除錆液の供給時に
除錆液を加熱できるようにした除錆液及び洗浄液の供給
機構であることを特徴とする腐食表面検査装置。5. The rust removing liquid and cleaning liquid supply mechanism according to claim 2, wherein a heater is provided on the liquid introducing member communicating between the liquid supply pump and the rust removing chamber forming container to supply the rust removing liquid. A corrosion surface inspection apparatus characterized in that it is a mechanism for supplying a rust removing liquid and a cleaning liquid which can sometimes heat the rust removing liquid.
表面検査装置及びその装置に用いられる除錆液及び洗浄
液の供給機構において、除錆室形成容器を経由せずに液
導出部材に接続して廃液する系において、液導出部材に
温度測定装置を設置しておき、この温度測定装置で測定
される温度が所定の温度になるようヒーターを制御して
除錆液の温度を所定の温度に保つ除錆液の温度制御方法
であることを特徴とする腐食表面検査装置。6. A rust removing liquid and a cleaning liquid supply mechanism used in the apparatus for inspecting a corrosion surface according to claim 3, wherein the liquid guiding member does not pass through a container for forming a rust removing chamber. In the system that is connected to and drained, a temperature measuring device is installed on the liquid lead-out member, and the heater is controlled so that the temperature measured by this temperature measuring device becomes a predetermined temperature to set the temperature of the rust removing liquid to a predetermined value. Corrosion surface inspection apparatus characterized by a method for controlling the temperature of a rust-removing liquid that keeps the temperature of the corrosion.
用いた廃液系に直接除錆液を廃液を行い、除錆液の温度
を所定の値に制御したのち、除錆液及び洗浄液の供給系
のバルブを切り替えることによって除錆室形成容器内に
所定の温度を有する除錆液を送り込むことを特徴とする
腐食表面検査装置。7. A rust-removing solution is directly drained to a waste liquid system using the rust-removing solution and cleaning solution supply mechanism according to claim 2, and the temperature of the rust-removing solution is controlled to a predetermined value. A corrosion surface inspection apparatus characterized in that a rust removing liquid having a predetermined temperature is fed into a rust removing chamber forming container by switching a valve of a cleaning liquid supply system.
容器内にブラシ状部材を有し、そのブラシ状部材を回転
させることができるようにしたことを特徴とする腐食表
面検査装置。8. A corrosion surface inspection apparatus according to claim 1, wherein a brush-like member is provided in the rust removing chamber forming container of the corrosion surface inspection apparatus, and the brush-like member can be rotated. .
し、レプリカ素材となる物質を外部に送り込む機構を有
するレプリカ素材送り出し装置と、レプリカ素材送り出
し装置と除錆室形成容器とを接続する管状部材とからな
る、レプリカ素材の供給機構を有することを特徴とする
腐食表面検査装置。9. A replica material delivery device having a material to serve as a replica material therein and having a mechanism for sending the material to be a replica material to the outside, and a tubular connecting the replica material delivery device and a container for forming a rust removing chamber. A corrosion surface inspection apparatus comprising a replica material supply mechanism comprising a member.
液供給用バルブ，液導入バルブ，液バイパスバルブ，ヒ
ーター加熱電源，ブラシ状部材回転モーター，温度測定
装置，除錆室形成装置固定用電磁マグネットを一括して
制御する制御装置により、検査対象表面の除錆を一括し
て行う表面除錆システムであることを特徴とする腐食表
面検査装置。10. A rust removing liquid supply valve, a cleaning liquid supply valve,
A control device that controls the liquid supply valve, liquid introduction valve, liquid bypass valve, heater heating power supply, brush-shaped member rotation motor, temperature measurement device, and rust-removing chamber forming device fixing electromagnetic magnet collectively provides control over the surface to be inspected. Corrosion surface inspection device characterized by a surface rust removal system that performs rust removal all at once.
であり、使用環境が軽水炉の冷却材である場合の腐食表
面検査装置の使用において、除錆液をりん酸、または塩
酸＋ヘキサメチレンテトラミンとし、それらの設定温度
をりん酸に対して５０℃〜７０℃、塩酸＋ヘキサメチレ
ンテトラミンに対して４０℃〜６０℃とした場合の、検
査対象部位へのそれら除錆液の供給時間ｔd(ｓ）を軽水
炉冷却材環境における２００℃以上での使用時間ｔi に
基づいて以下の式 【数１】{log(ｔi＋３６００)＋３}2＜ｔd＜{log(ｔi＋
３６００)＋３}2＋６０，(ｓ) から決める検査対象部位の除錆方法であることを特徴と
する腐食表面検査方法。11. The use of a corrosion surface inspection apparatus in which the material of the inspection target is ferritic steel and the use environment is a coolant for a light water reactor, the rust removing solution is phosphoric acid or hydrochloric acid + hexamethylenetetramine. When the set temperatures are 50 ° C. to 70 ° C. for phosphoric acid and 40 ° C. to 60 ° C. for hydrochloric acid + hexamethylenetetramine, supply time t d of the rust removing solution to the inspection target site (s) is calculated based on the usage time t i at 200 ° C. or more in a light water reactor coolant environment by the following equation: {log (t i +3600) +3} 2 <t d <{log (t i +
3600) +3} 2 +60, a corrosion surface inspection method characterized by being a rust removal method for an inspection target site determined from (s).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10161754A JPH11352051A (en) | 1998-06-10 | 1998-06-10 | Device and method for inspecting corrosion surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10161754A JPH11352051A (en) | 1998-06-10 | 1998-06-10 | Device and method for inspecting corrosion surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11352051A true JPH11352051A (en) | 1999-12-24 |
Family
ID=15741263
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10161754A Pending JPH11352051A (en) | 1998-06-10 | 1998-06-10 | Device and method for inspecting corrosion surface |
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| Country | Link |
|---|---|
| JP (1) | JPH11352051A (en) |
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|---|---|---|---|---|
| JP2002040186A (en) * | 2000-07-19 | 2002-02-06 | Toshiba Corp | Inside reactor piping checking device |
| WO2006131117A1 (en) * | 2005-06-07 | 2006-12-14 | Force Technology | Moulding device |
| EP1932647A2 (en) * | 2006-11-14 | 2008-06-18 | Atomic Energy of Canada Limited | Device and method for surface replication |
| JP2009068965A (en) * | 2007-09-12 | 2009-04-02 | Panasonic Electric Works Co Ltd | Test liquid coating apparatus for testing tracking resistance and tracking resistance testing method |
| JP2009300446A (en) * | 2008-06-17 | 2009-12-24 | Ge-Hitachi Nuclear Energy Americas Llc | Apparatus and method for remotely inspecting and treating weld, pipe, vessel, and the like in cooling system or the like |
| JP2011013128A (en) * | 2009-07-03 | 2011-01-20 | Hitachi-Ge Nuclear Energy Ltd | Metallic structure investigation method and device in reactor |
| US7997892B2 (en) | 2005-08-09 | 2011-08-16 | Force Technology | Moulding device and method of generating a cast of an inner surface of a tubular member |
| CN102928332A (en) * | 2012-11-22 | 2013-02-13 | 淮南中科储能科技有限公司 | Dynamic corrosion device of high-temperature liquid medium |
| CN105021517A (en) * | 2015-07-10 | 2015-11-04 | 核工业理化工程研究院 | Movable corrosion test-bed |
| CN107192660A (en) * | 2017-05-27 | 2017-09-22 | 中国科学院上海技术物理研究所 | It is a kind of to be used for the apparatus and method that dynamic observes Cdl-x_Znx_Te chemical attack hole |
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- 1998-06-10 JP JP10161754A patent/JPH11352051A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002040186A (en) * | 2000-07-19 | 2002-02-06 | Toshiba Corp | Inside reactor piping checking device |
| WO2006131117A1 (en) * | 2005-06-07 | 2006-12-14 | Force Technology | Moulding device |
| US7997892B2 (en) | 2005-08-09 | 2011-08-16 | Force Technology | Moulding device and method of generating a cast of an inner surface of a tubular member |
| US9289922B2 (en) | 2006-11-14 | 2016-03-22 | Atomic Energy Of Canada Limited/Energie | Device and method for surface replication |
| EP1932647A2 (en) * | 2006-11-14 | 2008-06-18 | Atomic Energy of Canada Limited | Device and method for surface replication |
| EP1932647A3 (en) * | 2006-11-14 | 2008-06-25 | Atomic Energy of Canada Limited | Device and method for surface replication |
| JP2009068965A (en) * | 2007-09-12 | 2009-04-02 | Panasonic Electric Works Co Ltd | Test liquid coating apparatus for testing tracking resistance and tracking resistance testing method |
| JP2009300446A (en) * | 2008-06-17 | 2009-12-24 | Ge-Hitachi Nuclear Energy Americas Llc | Apparatus and method for remotely inspecting and treating weld, pipe, vessel, and the like in cooling system or the like |
| JP2011013128A (en) * | 2009-07-03 | 2011-01-20 | Hitachi-Ge Nuclear Energy Ltd | Metallic structure investigation method and device in reactor |
| CN102928332A (en) * | 2012-11-22 | 2013-02-13 | 淮南中科储能科技有限公司 | Dynamic corrosion device of high-temperature liquid medium |
| CN105021517A (en) * | 2015-07-10 | 2015-11-04 | 核工业理化工程研究院 | Movable corrosion test-bed |
| CN107192660A (en) * | 2017-05-27 | 2017-09-22 | 中国科学院上海技术物理研究所 | It is a kind of to be used for the apparatus and method that dynamic observes Cdl-x_Znx_Te chemical attack hole |
| CN107192660B (en) * | 2017-05-27 | 2023-09-12 | 中国科学院上海技术物理研究所 | Device and method for dynamically observing tellurium-zinc-cadmium material chemical corrosion pits |
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