JPS6262290A - Joint structure of bottom lining plate in pool for storing nuclear fuel - Google Patents
Joint structure of bottom lining plate in pool for storing nuclear fuelInfo
- Publication number
- JPS6262290A JPS6262290A JP60201658A JP20165885A JPS6262290A JP S6262290 A JPS6262290 A JP S6262290A JP 60201658 A JP60201658 A JP 60201658A JP 20165885 A JP20165885 A JP 20165885A JP S6262290 A JPS6262290 A JP S6262290A
- Authority
- JP
- Japan
- Prior art keywords
- joint structure
- nuclear fuel
- lining plate
- groove
- welding
- 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.)
- Granted
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
Landscapes
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Arc Welding In General (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、原子力発電プラントにおける使用済み核燃
料や放射性廃棄物など貯蔵する核燃料貯蔵用プールにお
ける底部ライニングの継手構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a joint structure for a bottom lining in a nuclear fuel storage pool for storing spent nuclear fuel, radioactive waste, etc. in a nuclear power plant.
（従来技術およびその問題点）
一般に使用済み核燃料や放射能を含む廃液などを貯蔵す
るプールは、鉄筋コンクリート構造のプール本体の内面
に、ステンレスなどの金属板を用いてライニングを施し
、放射能を含む液のプラント系外への漏洩を完全に防止
する構造として構築することが要請きれる。(Prior art and its problems) In general, pools that store spent nuclear fuel and waste liquid containing radioactivity are constructed by lining the inner surface of the pool body with a reinforced concrete structure using metal plates such as stainless steel. It is necessary to construct a structure that completely prevents leakage of liquid outside the plant system.
しかるに、従来のライニングプレートの施工は、プール
本体であるコンクリート躯体を構築したのち、その内面
に後張り方式で施工するためライニングプレートの継手
溶接部の品質検査がきわめて困難である。具体的に言え
ば片面溶接で、その裏側は厚いコンクリート壁で囲まれ
ているため、表面上に現れるアンダーカットや溶は込み
不良等の外観検査で確認できる範囲の品質検査は充分徹
底きれるが、ブロホールやその他の内部的欠陥の検査は
きわめて困難である。However, in the conventional construction of lining plates, after constructing the concrete frame that is the pool body, the construction is carried out on the inner surface of the concrete frame using a post-laying method, which makes it extremely difficult to inspect the quality of the joint welds of the lining plate. Specifically, it is one-sided welded, and the back side is surrounded by a thick concrete wall, so it is possible to perform a thorough quality inspection to the extent that it can be confirmed by external inspection such as undercuts and poor weld penetration that appear on the surface. Inspecting for blowholes and other internal defects is extremely difficult.
また使用中に溶接部に亀裂等が発生し、その結果、液が
漏洩しコンクリート躯体に浸透したような場合の漏洩検
知は仲々困難であるという欠点があった。Another disadvantage is that it is very difficult to detect the leakage if cracks or the like occur in the welded parts during use, and as a result, the liquid leaks and penetrates into the concrete structure.
そこで、溶接部の裏側に特別の空間を設けて、そこに漏
洩検知機能をもたせるなどいろいろな工夫がなされてい
るが、いまだこれといったものはない。Various efforts have been made to address this issue, such as creating a special space behind the weld to provide a leak detection function, but nothing quite like this has yet been developed.
（問題点を解決するための手段）
本発明は、このような問題点を解決するため、ライニン
グプレートの溶接継手構造に工夫をこらし、とくに底部
ライニングの溶接継手構造をＴＩＧ溶接の特性を生かし
、バックシールドガスを採用した裏波溶接のできる継手
構造とし、しかもその継手構造を施工後における漏洩検
知機構として機能きせることかできるよう配慮したこと
にある。(Means for Solving the Problems) In order to solve these problems, the present invention devises the welded joint structure of the lining plate, and in particular, makes use of the characteristics of TIG welding for the welded joint structure of the bottom lining. The joint structure is designed to allow back shielding gas to be welded, and consideration has been given to allowing the joint structure to function as a leakage detection mechanism after construction.
その発明の要旨とするところは、核燃料貯蔵用プールに
おける底部根太フレームの部材表面にあらかじめ溝を形
成して、この溝をライニングプレートの突合わせ溶接に
おけるバックシールドガス溜とする裏当材とし、かつ、
その突合わせ溶接を裏波溶接からなる継手構造としたこ
とにある。The gist of the invention is to form grooves in advance on the surface of a member of a bottom joist frame in a nuclear fuel storage pool, and use the grooves as a backing material to serve as a back shield gas reservoir in butt welding of lining plates; ,
The butt weld is a joint structure made of Uranami welding.
さらに、前記溝を円弧状に形成するとともに、溝の底部
附近に一定間隔で小孔を穿設し、この小孔を介して溝に
連通する漏洩検知管を接続し、万一溶接部より放射性を
帯びた貯蔵液が漏洩した場合、前記漏洩検知管より流れ
てくる液をセンサーにより検知できるように構成したも
のである。Furthermore, the groove is formed into an arc shape, and small holes are drilled at regular intervals near the bottom of the groove, and a leakage detection tube communicating with the groove is connected through the small hole. If the stored liquid leaks, the liquid flowing from the leakage detection tube can be detected by a sensor.
（実施例） 以下、実施例図に基づき、ざらに具体的に説明する。(Example) Hereinafter, a detailed description will be given based on examples.
第１図は使用済み核燃料貯蔵用プールの構造を例示する
斜視図である。一般に図示の通り厚い鉄筋コンクリート
からなる角型槽で図示においては省略したが上部に荷扱
設備としての天井走行うレーン等が配備されている。と
ころでプール本体（１）は上述したように厚い鉄筋コン
クリート壁（２）から構成され、その内面にステンレス
鋼板からなるライニングプレート（３）が内張りされて
いるものである。FIG. 1 is a perspective view illustrating the structure of a spent nuclear fuel storage pool. Generally, as shown in the figure, it is a rectangular tank made of thick reinforced concrete, and although not shown in the figure, overhead lanes and the like are provided as cargo handling equipment at the top. As described above, the pool body (1) is composed of a thick reinforced concrete wall (2), and the inner surface of the pool body (1) is lined with a lining plate (3) made of a stainless steel plate.
ざて、本発明は、このステンレス鋼板からなるライニン
グプレート（３）を底部に内張すする場合の単位ランニ
ングプレート（３）同志の突合わせ溶接の継手構造を第
４図で示すように構成したもので、以下その構成を説明
する。In the present invention, when the lining plate (3) made of stainless steel plate is lined at the bottom, the joint structure of butt welding of unit running plates (3) is constructed as shown in Fig. 4. Its configuration will be explained below.
なお、その前に第２図および第３図で底部の構造を説明
すると（４）は基礎コンクリート壁であり、（５）はこ
の基礎コンクリート壁にあらかじめ埋設した口型鋼を格
子状に組んで配設した根太フレームである。Before that, to explain the structure of the bottom part in Figures 2 and 3, (4) is the foundation concrete wall, and (5) is the foundation concrete wall that is constructed by assembling the mouth-shaped steel in a lattice shape. This is a joist frame.
ライニングプレート（３）は、この根太フレーム（５）
を構成する縦方向、横方向の口型鋼の構成する四角形の
マスに一枚づつ配設し、かつ根太フレーム（５）を構成
する口型を裏当材として、その上に隣接するライニング
プレート（３）の周縁同志を突合わせ溶接により展設す
るものである。The lining plate (3) is attached to this joist frame (5).
The lining plate (5) is placed one by one in each rectangular square constituted by the vertical and horizontal end steel that constitutes the joist frame (5), and the adjacent lining plate ( The peripheral edges of 3) are expanded by butt welding.
とて、第４図が、上記突合わせ溶接における本発明の継
手構造を示すもので、裏当材となる根太フレーム（５）
のＥ型鋼表面中央にあらかじめ溝（６）を形成しておく
。Figure 4 shows the joint structure of the present invention in the above-mentioned butt welding.
A groove (6) is previously formed in the center of the surface of the E-type steel.
なお、この溝（６）は突合わせ溶接するライニングプレ
ート（３）（３）のルート間隔の中央部に位置するとこ
ろが一番深＜（３〜４ｍｍ程度）、左右に浅くなった円
弧状の溝となっている。Note that this groove (6) is the deepest at the center of the root spacing of the lining plates (3) (3) to be butt welded (about 3 to 4 mm), and is an arcuate groove that becomes shallower on the left and right. It becomes.
次にライニングプレート（３）（３）を前記裏当材とな
る 型鋼の溝（６）を中心にして左右に配設し、しかる
のちライニングプレート（３）（３）と溝（６）との間
に形成さる空間をバックシールドガスのガス溜とする。Next, the lining plates (3) (3) are placed on the left and right sides of the groove (6) of the shaped steel serving as the backing material, and then the lining plates (3) (3) and the groove (6) The space formed between them is used as a gas reservoir for backshield gas.
シールドガスは一般的なアルゴンガスを用い、その注入
方法は後述する。そして突合わせ部の裏面に裏波ができ
るよう溶接施工条件を設定していわゆるＴＩＧ溶接によ
る溶接をおこなうものである。（９）はそのＴＩＧ溶接
による溶接部で（１０）はその裏波である。General argon gas is used as the shielding gas, and its injection method will be described later. Then, welding conditions are set so that a back wave is formed on the back side of the butt part, and welding is performed by so-called TIG welding. (9) is the welded part by TIG welding, and (10) is the back wave.
なお実施例においては、裏波溶接部（１０）を裏当材に
完全に溶着させ、溝（６）を左右に分割した構造として
いる。In the embodiment, the Uranami welded part (10) is completely welded to the backing material, and the groove (6) is divided into left and right parts.
すなわち、裏波溶接によってライニングプレート（３）
と裏当材とを一体的構造とし、底部ライニングプレート
（３）に作用する荷重を溶接部（９）に集中的に負荷さ
れるのを抑止する構造とした。In other words, the lining plate (3) is assembled by Uranami welding.
The and backing material are integrally constructed to prevent the load acting on the bottom lining plate (3) from being concentrated on the welded part (9).
図中（７）は前記口型鋼の溝（６）に穿設した小孔であ
り、第４図で示すように前記溶接で形成きれた裏波部（
１０）の左右に２個穿設しである。（８）はこの小孔（
７）に連通ずる漏洩検知管である。もちろんこの小孔（
７）および漏洩検知管（８）は、前記溶接施工前に組込
んでおき、前述したバックシールドガスは、この漏洩検
知管（８）を利用して溝（６）内に注入する。In the figure, (7) is a small hole drilled in the groove (6) of the mouth steel, and as shown in Figure 4, the back wave part (
There are two holes on the left and right sides of 10). (8) is this small hole (
7) is a leak detection tube connected to. Of course this small hole (
7) and the leakage detection tube (8) are assembled before the welding work, and the aforementioned backshield gas is injected into the groove (6) using this leakage detection tube (8).
（発明の作用・効果）
ざて、本発明は、上述した説明から理解きれるように底
部に敷設するライニングブレー） （３） （３）同志
の溶接を根太フレーム（５）を構成する口型鋼を裏当材
とし、とくにその裏当材にあらかじめ円弧状の溝（６）
を形成しておき、バックシールドガスを用いた裏波溶接
による継手構造としたため、溶接品質が高く保持され、
従来の単純な突合わせ溶接によるライニングプレートの
施工に比較して格段に優れた継手構造となる。(Operations and Effects of the Invention) As can be understood from the above explanation, the present invention provides a lining brake installed at the bottom (3) (3) (3) Welding of the joints to the mouth type steel constituting the joist frame (5). A backing material, especially an arcuate groove (6) in the backing material in advance.
The welding quality is maintained at a high level because the joint structure is made by Uranami welding using backshield gas.
The result is a joint structure that is much superior to the conventional construction of lining plates using simple butt welding.
すなわち、厳しい安全性を要求される核燃料貯蔵プール
のライニングとして、きわめて適切な構造となる。次に
従来の溶接によるライニング施工によるものにあっては
、その溶接継手部よりの漏洩に対する検知手段として冒
頭にて説明したように、特別な検知機構を組込ませてい
るが本発明においては、溶接施工段階においてバックシ
ールドガス溜として利用する溝（６）を設けているので
、これを施工後の漏洩検知機構として利用できる点であ
る。In other words, the structure is extremely suitable as a lining for a nuclear fuel storage pool that requires strict safety. Next, in the case of conventional lining construction by welding, a special detection mechanism is incorporated as a means of detecting leakage from the welded joint, as explained at the beginning, but in the present invention, welding Since the groove (6) is provided to be used as a back shield gas reservoir during the construction stage, this can be used as a leakage detection mechanism after construction.
すなわち、従来の継手構造の場合に比較し、施工上の経
済性ざらに機能上の利便性が高い。That is, compared to the conventional joint structure, it is more economical in construction and more convenient in terms of functionality.
なお、溶接時のバックシールドガスの注入機構とし、ま
たプールとしての使用時における漏洩検知機構として機
能する溝（６）に設ける小孔（７）およびこれに連通す
る漏洩検知管（８）は、底部に配設されたライニングプ
レート（３）１枚毎に分担してその機能を発揮できるよ
うに構成しである。The small hole (7) provided in the groove (6) and the leak detection tube (8) communicating with the groove (6) function as a back shield gas injection mechanism during welding and as a leak detection mechanism when used as a pool. The structure is such that each lining plate (3) disposed at the bottom can perform its function separately.
それによって、溶接作業時におけるバックシールドガス
の注入の作業の効率性、ざらには漏洩検知時における漏
洩位置の場所的確認をより効率的にできるよう配慮しで
ある。This makes it possible to more efficiently inject backshield gas during welding work, and to more efficiently confirm the location of a leak when detecting a leak.
なお、本発明の実施例において根太フレーム（５）とな
る型鋼として口型鋼を選定したが、フラットパーと呼ば
れる帯板鋼を適用しである場合もある。In addition, in the embodiment of the present invention, a mouth-shaped steel was selected as the shaped steel serving as the joist frame (5), but a strip steel called flat par may also be used.
ざらに本発明の底部ライニングプレートの継手構造は、
単に核燃料貯蔵用プールにのみ限定されるものではなく
、気密性を厳しく要求される各種化学プラントに使用さ
れる貯槽類に適用できるものであることを付記する。Roughly speaking, the joint structure of the bottom lining plate of the present invention is as follows:
It should be noted that the present invention is not limited only to pools for storing nuclear fuel, but can also be applied to storage tanks used in various chemical plants where airtightness is strictly required.
第１図は使用済み核燃料貯蔵用プールを例示する斜視図
、第２図は一部を破断して示すプール底部の平面図、第
３図は第２図のＡ−Ａ１ｇ縦断側面図、第４図は継手部
の詳細を示す拡大縦断側面図である。
１、−−−−−プール本体
２、−−−−一鉄筋コンクリート壁
３、−−−一一ライニングプレート
４、−−−−一基礎コンクリート
５、−−−−一根太フレーム
６、−−−−一溝
７、−−−−一小孔
８、−−−−一漏洩検知管
９、−−−ｍ−溶接部
１０、−一−−−裏波溶接部Fig. 1 is a perspective view illustrating a spent nuclear fuel storage pool, Fig. 2 is a partially cutaway plan view of the bottom of the pool, Fig. 3 is a vertical side view taken along line A-A1g in Fig. The figure is an enlarged longitudinal sectional side view showing details of the joint. 1, ----Pool body 2, ----1 reinforced concrete wall 3, -1 lining plate 4, ----1 foundation concrete 5, ----1 joist frame 6, ---- -One groove 7,---One small hole 8,---One leak detection tube 9,---M-welded part 10,-One---Uranami welded part
Claims (1)
んで根太フレームを構築し、その上に所定サイズのライ
ニングプレートを敷きつめるとともに、各ライニングプ
レートの周縁同志を前記根太フレームを裏当材として突
合わせ溶接し、核燃料貯蔵用プールの底部ライニングを
施工するものにあって、前記裏当材となる根太フレーム
の部材表面に、あらかじめ溝を形成し、この溝を前記ラ
イニングプレートの突合わせ溶接におけるバックシール
ドガス溜とするとともに、その突合わせ溶接を裏波溶接
からなる継手構造とした核燃料貯蔵用プールにおける底
部ライニングプレートの継手構造。 ２）裏波を裏当材に溶着してライニングプレートと裏当
材とを一体構造とした特許請求の範囲第１項記載の核燃
料貯蔵用プールにおける底部ライニングプレートの継手
構造。 ３）溝を円弧状とした特許請求の範囲第１項記載の核燃
料貯蔵用プールにおける底部ライニングプレートの継手
構造。 ４）溝の下面に一定間隔で小孔を穿設し、この小孔を介
して溝に連通する漏洩検知管を接続した特許請求の範囲
第１項記載の核燃料貯蔵用プールにおける底部ライニン
グプレートの継手構造。[Claims] 1) Build a joist frame by assembling shaped steel materials such as L-shaped steel and In a method for constructing the bottom lining of a nuclear fuel storage pool by butt-welding the joist frame with the joist frame as a backing material, a groove is formed in advance on the surface of the member of the joist frame that becomes the backing material; A joint structure for a bottom lining plate in a nuclear fuel storage pool, in which the groove is used as a backshield gas reservoir in the butt welding of the lining plates, and the butt weld is a joint structure consisting of back wave welding. 2) A joint structure for a bottom lining plate in a nuclear fuel storage pool according to claim 1, wherein the lining plate and the backing material are integrally constructed by welding the uranami to the backing material. 3) A joint structure for a bottom lining plate in a nuclear fuel storage pool according to claim 1, wherein the groove is arcuate. 4) A bottom lining plate in a nuclear fuel storage pool according to claim 1, wherein small holes are bored at regular intervals on the lower surface of the groove, and a leak detection tube communicating with the groove is connected through the small holes. Joint structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60201658A JPS6262290A (en) | 1985-09-13 | 1985-09-13 | Joint structure of bottom lining plate in pool for storing nuclear fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60201658A JPS6262290A (en) | 1985-09-13 | 1985-09-13 | Joint structure of bottom lining plate in pool for storing nuclear fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6262290A true JPS6262290A (en) | 1987-03-18 |
| JPH0479598B2 JPH0479598B2 (en) | 1992-12-16 |
Family
ID=16444743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60201658A Granted JPS6262290A (en) | 1985-09-13 | 1985-09-13 | Joint structure of bottom lining plate in pool for storing nuclear fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6262290A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2915695A1 (en) * | 2007-05-04 | 2008-11-07 | Societat D Orbres I Freballs S | Making a lining for cold pool, comprises adjacently mounting a series of plates on a concrete wall and welding the plates with each other to form a part of a wall of the lining, and fixing the plates parallel to the concrete wall |
| WO2008152220A2 (en) * | 2007-05-04 | 2008-12-18 | Societat D'obres I Freballs Subterranis Del Pirinev Carretera Dels Cortals | Method of making a liner for a pool, tank or containment enclosure |
| JP2014066611A (en) * | 2012-09-26 | 2014-04-17 | Mitsubishi Heavy Ind Ltd | Water leakage detection method and repair method for nuclear fuel storage pool |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000273973A (en) * | 1999-03-24 | 2000-10-03 | Nippon Steel Corp | Covering method for anticorrosion metal sheet for preventing deterioration of concrete structure |
-
1985
- 1985-09-13 JP JP60201658A patent/JPS6262290A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2915695A1 (en) * | 2007-05-04 | 2008-11-07 | Societat D Orbres I Freballs S | Making a lining for cold pool, comprises adjacently mounting a series of plates on a concrete wall and welding the plates with each other to form a part of a wall of the lining, and fixing the plates parallel to the concrete wall |
| FR2915696A1 (en) * | 2007-05-04 | 2008-11-07 | Societat D Orbres I Freballs S | METHOD FOR PRODUCING A TILT FOR A REFRIGERATION POOL |
| WO2008152220A2 (en) * | 2007-05-04 | 2008-12-18 | Societat D'obres I Freballs Subterranis Del Pirinev Carretera Dels Cortals | Method of making a liner for a pool, tank or containment enclosure |
| WO2008152220A3 (en) * | 2007-05-04 | 2009-03-05 | Societat D Obres I Freballs Su | Method of making a liner for a pool, tank or containment enclosure |
| CN101918167A (en) * | 2007-05-04 | 2010-12-15 | 派雷内斯地下工程协会 | Be formed for the obducent method of pond, case or protecting crust |
| US8785805B2 (en) | 2007-05-04 | 2014-07-22 | Societat D'obres I Treballs Subterranis Del Pirineu, S.L. (Sots, S.L.) | Method of making a covering for a containment pool, tank or enclosure |
| JP2014066611A (en) * | 2012-09-26 | 2014-04-17 | Mitsubishi Heavy Ind Ltd | Water leakage detection method and repair method for nuclear fuel storage pool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0479598B2 (en) | 1992-12-16 |
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