JPS60144695A - Method and device for cutting and treating used nuclear reactor internal instrumentaion pipe - Google Patents
Method and device for cutting and treating used nuclear reactor internal instrumentaion pipeInfo
- Publication number
- JPS60144695A JPS60144695A JP59000865A JP86584A JPS60144695A JP S60144695 A JPS60144695 A JP S60144695A JP 59000865 A JP59000865 A JP 59000865A JP 86584 A JP86584 A JP 86584A JP S60144695 A JPS60144695 A JP S60144695A
- Authority
- JP
- Japan
- Prior art keywords
- instrumentation
- reactor
- cutting
- storage container
- instrumentation tube
- 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
Landscapes
- Turning (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】
〔発明の技術分野〕
この発明は、沸騰水形原子炉（以下単に原子炉と言う）
の使用済み原子炉内計装管（以下単に計装管と言う）の
切断処理方法とその装置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a boiling water nuclear reactor (hereinafter simply referred to as a nuclear reactor).
This invention relates to a method for cutting and processing used in-reactor instrumentation tubes (hereinafter simply referred to as instrumentation tubes) and an apparatus therefor.
従来の計装管の切断処理方法とその装置を第１図、第２
図について説明する。The conventional method for cutting instrumentation pipes and its equipment are shown in Figures 1 and 2.
The diagram will be explained.
第１図は計装管の切断処理装置をなす切断具ｌを示す。FIG. 1 shows a cutting tool 1 forming an instrumentation tube cutting device.
切断具１の板材からなる支持本体２の一端部には、円盤
形の固定受台３が固着されている。A disk-shaped fixed pedestal 3 is fixed to one end of a support body 2 made of a plate material of the cutting tool 1.
支持本体２の他端部には、外周断面が円形のカッタヘッ
ド支持台４が、固定受台３と中心軸線を同一直線上に置
き固定受台と対向して外壁において固着されている。カ
ッタヘッド支持台４は、流体シリンダをなし、図示しな
い右端゛にピストンを備えた段付円柱形カッタヘッド５
をカッタヘッド５の中心軸線方向に移動自在に且つ図示
しない公知構造によりその回転を阻止して支承し、カッ
タヘッド５と共にその移動機構を構成する。カッタヘッ
ド支持台４には、図示しない圧力流体源に一端、匁５接
続された流体管路６，７の他端が接続されている。カッ
タヘッド５の固定受台３に対向する一端には、押切形カ
ッタ８が、その切刃を固定受台３力ツタヘツド支持台４
の中心軸線と直角に交え、支持本体２の上下面に平行に
して、固着されている。支持本体２には、互いに直角方
向につり手９゜ｌＯが固着されている。At the other end of the support body 2, a cutter head support 4 having a circular outer peripheral cross section is fixed to the outer wall with its central axis aligned with the fixed pedestal 3 and facing the fixed pedestal. The cutter head support base 4 forms a fluid cylinder, and a stepped cylindrical cutter head 5 is provided with a piston at the right end (not shown).
is supported so as to be movable in the direction of the central axis of the cutter head 5 and prevented from rotating by a known structure (not shown), and together with the cutter head 5 constitutes a moving mechanism. One end of the cutter head support 4 is connected to a pressure fluid source (not shown), and the other ends of fluid conduits 6 and 7 are connected to a pressure fluid source (not shown). At one end of the cutter head 5 facing the fixed pedestal 3, a push-cutting cutter 8 has its cutting blade fixed to the pedestal 3.
It is fixed perpendicularly to the central axis of the support body 2 and parallel to the upper and lower surfaces of the support body 2. Hanging hands 9°lO are fixed to the support body 2 in directions perpendicular to each other.
計装管１１は、原子炉圧力容器１２中炉心部１３に、上
端部を上部格子板１４により、下方中間部を炉心支持板
１５により支承され、下端部を原子炉圧力容器１２の下
底から下方に突出させて１、鉛直に挿入されている。The instrumentation tube 11 is supported in the middle core part 13 of the reactor pressure vessel 12 at its upper end by an upper grid plate 14 and at its lower middle part by a core support plate 15, and its lower end is supported from the bottom of the reactor pressure vessel 12. It is inserted vertically with 1 protruding downward.
計装管１１を切断処理するには、先ず、図示しない荷投
機のワイヤロープ下端に懸下された計装管取扱い具（以
下単に取扱い具という）１６により計装管１１の上端部
を把持し、第２図に示すように、その下端部が炉心部１
３上部格子板１４より高い位置に達するまで計装管１１
をつり揚げる。To cut the instrumentation pipe 11, first, the upper end of the instrumentation pipe 11 is grasped with an instrumentation pipe handling tool (hereinafter simply referred to as a handling tool) 16 suspended from the lower end of a wire rope of a cargo speculator (not shown). , as shown in Figure 2, its lower end is the core part 1.
3 until the instrumentation tube 11 reaches a position higher than the upper grid plate 14.
Fish and fry.
このとき、原子炉圧力容器１２内及びその上方原子炉ウ
ェル１７、原子炉ウェル１７に隣接する核燃料貯蔵プー
ル１８、炉内機器貯蔵プール１９は、隔壁を開放されて
連通し冷却水２０を満たされている。上端部を取扱い具
１６により把持された計装管１１は、次に、図示しない
荷投機のワイヤ口により、冷却水２０中で、水平又は斜
めにつかみ変えられ、核門料貯蔵ブー・し１゛８側に移
動される。At this time, the reactor well 17 in and above the reactor pressure vessel 12, the nuclear fuel storage pool 18 adjacent to the reactor well 17, and the in-reactor equipment storage pool 19 are opened for communication and filled with cooling water 20. ing. The instrumentation tube 11, whose upper end is gripped by the handling tool 16, is then gripped horizontally or diagonally in the cooling water 20 by a wire port of a cargo speculator (not shown), and is transferred to the nuclear charge storage boot 1.゛Moved to the 8 side.
次に、図示しない荷投機のワイヤロープの下端につり手
１０を介して懸下された切断具１を、その固定受台３、
押切形カッタ８間に計装管１．２の長さ方向所望の箇所
が来るように、計装管１１にあてがい、流体管路６を経
てカッタヘッド支持台４中に圧力流体を送入すれば、計
装管１１は、固定受台３、押切形カッタ８間に挾まれ次
いでその箇所で切断される。圧力流体入口管路を流体管
路６から流体管路７に切り換える０とζこより・力・ア
ヘッド５はカッタヘッド支持台４に対し原位置に復帰す
る。計装管１１の切断片は、計装管つかみ具２１又は２
２により核燃料貯蔵プール１８中に設置されている収納
容器２３中に収納される。計装管１１の長さは通常約１
４脩であるが、輸送上の必要から計装管１１は４ｍ以下
の長さに従って３箇所で切断する必要があり、計装管１
１の切断されて残った長い方の残部を更に切断するため
には、計装管つかみ具２１又は２２、切断具ｌの位置を
計装管１１の長さ方向に沿って移動する。Next, the cutting tool 1 suspended from the lower end of the wire rope of a speculator (not shown) via the hanging handle 10 is attached to its fixed pedestal 3,
Place the instrumentation tube 11 so that the desired lengthwise position of the instrumentation tube 1.2 is between the push-cut cutters 8, and feed pressure fluid into the cutter head support 4 through the fluid conduit 6. For example, the instrumentation pipe 11 is sandwiched between the fixed pedestal 3 and the push cutter 8, and then cut at that point. The force ahead 5, which switches the pressure fluid inlet line from the fluid line 6 to the fluid line 7, returns to its original position relative to the cutter head support base 4. The cut piece of the instrumentation tube 11 is attached to the instrumentation tube grip 21 or 2.
2, the nuclear fuel is stored in a storage container 23 installed in the nuclear fuel storage pool 18. The length of the instrumentation tube 11 is usually about 1
However, due to transportation needs, it is necessary to cut the instrumentation pipe 11 at three points according to the length of 4m or less, and the instrumentation pipe 1
In order to further cut the longer remaining portion of the instrumentation tube 11, the positions of the instrumentation tube grip 21 or 22 and the cutting tool 1 are moved along the length of the instrumentation tube 11.
計装管の所望本数線てについて前記各作業が繰り返され
る。The above operations are repeated for the desired number of lines of the instrumentation tube.
計装管の前記従来の切断処理装置を用いて計装管を切断
処理する前記従来の方法においては、欠配の点が問題で
ある。In the conventional method of cutting an instrumentation tube using the conventional instrumentation tube cutting and treatment apparatus, there is a problem in that there is a shortage.
（１）計装管１１の１本を炉心部１３から抜き出し切断
するためには、取扱い具１６、計装管つかみ具２１．２
２により、合計少なくとも３回冷却水２０中でのつかみ
変え作業が必要であり、この作業は熟練を要する困難な
作業である。(1) In order to extract and cut one of the instrumentation tubes 11 from the reactor core 13, the handling tool 16, the instrumentation tube grip 21.2
2, it is necessary to change the grip in the cooling water 20 at least three times in total, and this work is difficult and requires skill.
（２）計装管１１を横移動する際、誤って冷却水２０の
水面上に露出させる處れがあり、この場合、計装管１１
は高放射性を帯びているため、近くにいる作業員が多量
の放射線被ばくを受ける危険がある。(2) When moving the instrumentation pipe 11 laterally, there is a risk that the instrumentation pipe 11 will be exposed above the water surface of the cooling water 20 by mistake; in this case, the instrumentation pipe 11
is highly radioactive, and there is a risk that nearby workers may be exposed to large amounts of radiation.
（３） 計装管１１を切断具１で３箇所切断する際、切
断箇所が変わる都度、計装管つかみ具２１又は２２のつ
かみ変えと共に切断具１の移動が必要である。(3) When cutting the instrumentation tube 11 at three locations with the cutting tool 1, it is necessary to change the instrumentation tube grip 21 or 22 and move the cutting tool 1 each time the cutting location changes.
前記（１） ？ （３）に記載の理由により、従来の装
置及び方法により計装管を切断処理する作業は、複雑に
して困難且つ多くの工数を委し、そのために又作業現場
の近くにいる作業員の放射線被ばくの危険が一層大きく
なる。Above (1)? For the reasons stated in (3) above, the work of cutting instrumentation pipes using conventional equipment and methods is complicated, difficult, and requires a lot of man-hours, and it also causes radiation exposure to workers near the work site. The risk of exposure to radiation becomes even greater.
この発明は、計装管の従来の切断処理方法とその装置の
前記問題点を解決するためになされたもので、計装管の
切断処理を容易簡単な作業で行うことができ、その作業
工数を節減し、作業員の放射線被ばくの危険を減少でき
る計装管の切断処理方法とその装置を提供することを目
的とする。This invention was made in order to solve the above-mentioned problems of the conventional method and device for cutting instrumentation pipes, and it is possible to cut instrumentation pipes easily and easily, reducing the number of man-hours involved. An object of the present invention is to provide a method and device for cutting an instrumentation tube, which can reduce radiation exposure and reduce the risk of radiation exposure to workers.
この発明による計装管の切断処理方法とその装置は、切
断処理装置を、計装管が鉛直に挿入できる無蓋有底筒形
の収納容器と、この収納容器の上端部に取り付けられそ
の部位で下端が収納容器中に挿入された計装管を切断で
きる切断具とを備えた構成とし、原子炉圧力容器内炉心
部定位置に着脱自在に挿入装着可能な形状に構成し、こ
の切断処理装置を、初めに 炉心部定位置に取り付け、
炉心部中の計装管を、取扱い具によりその上端部を把持
してつり揚げ切断処理装置の直上に移動し、計装管の下
端が収納容器中所望深さに達するまで計装管をつり降ろ
してその位置で保持し、切断具を作動させてその部位で
計装管を切断し、この計装管のつり降ろし切断を所要回
数繰り返し、計装管の取扱い具による上端部把持を解放
し、計装管１本分の切断片が総数収納容器中に収納され
た後、他の計装管所望本数についても前記各作業を繰り
返した後、計装管切断片が収納された切断処理装置を核
燃料貯蔵プール中所定場所に移置することにより、前記
目的を達するものである。The method and device for cutting an instrumentation tube according to the present invention include a cutting device that is attached to an open bottom cylindrical storage container into which an instrumentation tube can be vertically inserted; The cutting device has a lower end equipped with a cutting tool capable of cutting an instrumentation tube inserted into a storage container, and is configured in a shape that can be removably inserted into a fixed position in the core of a reactor pressure vessel. First, install it in place in the reactor core,
Grasp the upper end of the instrumentation tube in the reactor core with a handling tool, move it directly above the lifting and cutting equipment, and suspend the instrumentation tube until the lower end of the instrumentation tube reaches the desired depth in the storage container. Lower it and hold it in that position, operate the cutting tool to cut the instrumentation tube at that location, repeat the lowering and cutting of this instrumentation tube the required number of times, and release the upper end grip by the instrumentation tube handling tool. After the cut pieces for one instrumentation tube are stored in the total number storage container, the above-mentioned operations are repeated for the desired number of other instrumentation tubes, and then the cutting processing device stores the cut pieces of the instrumentation tube. The above purpose is achieved by moving the fuel to a predetermined location in the nuclear fuel storage pool.
計装管のこの発明による切断処理装置の一実施例を第３
図により説明する。A third embodiment of the cutting device for instrumentation pipes according to the present invention will be described below.
This will be explained using figures.
切断処理装置５０は、無蓋有底角筒形の収納容器６０と
、収納容器６０の上端部に組み付けられた切断具７０と
からなっている。切断具７０は、切断具１（ＭｆＪＩ図
）と少部分のみが異なり他の大部分は全く切断具１と同
一構成であり、この同一部分に付いては８ｔ！３図にお
いて第１図におけると同一符号を付してその説明を省略
し第１図についての前記説明をもってそれに代え異なる
部分のみにつき次に説明する。The cutting device 50 includes a storage container 60 in the shape of a rectangular cylinder with an open bottom and a cutting tool 70 assembled to the upper end of the storage container 60. The cutting tool 70 differs from the cutting tool 1 (MfJI drawing) only in a few parts, and most of the other parts have the same structure as the cutting tool 1, and the same part has 8 tons! In FIG. 3, the same reference numerals as in FIG. 1 are given, and the explanation thereof will be omitted, and instead of the above explanation for FIG. 1, only the different parts will be explained next.
切断具１におけるつり手９，１０の代りに、切断具７０
においてはその支持本体２の上面２箇所につり手７１．
７２が直立に固着され、切断具７０は、そのカッタヘッ
ド５がカッタヘッド支持台４に対し最も引き込んだ状態
にあるとき、固定受台３と押切形カッタ８きの中心軸線
上中間点が収納容器６０の鉛直中心軸線上にほぼ位置し
これら中心軸線が直角に交イっるように、収納容器６゜
の上端外壁３箇所にそれぞれねじ込才れた取付ボルト７
３と、支持本体２の端面２箇所、カッタヘッド支持台４
外側面１箇所に固着された支持脚７４とにより、収納容
器６０に着脱自在に取り付けられている。計装管１１が
楽に挿通できる漏斗状の案内部材７５は、その中心軸線
が収納容器６０の鉛直中心軸線の上方延長線とほぼ重な
り、固定受台３、カッタヘッド支持台４の幾分上方に位
置するように取付脚７６を介して支持本体２に固着され
ている。In place of the handles 9 and 10 in the cutting tool 1, a cutting tool 70 is used.
In this case, there are two handles 71 on the upper surface of the support body 2.
72 is fixed upright, and when the cutter head 5 of the cutting tool 70 is in the most retracted state with respect to the cutter head support 4, the midpoint on the central axis between the fixed pedestal 3 and the push-cut cutter 8 is retracted. Attachment bolts 7 with bent corners are screwed into three locations on the outer wall of the upper end of the storage container 6° so that the vertical central axes of the container 60 are approximately located and these central axes intersect at right angles.
3, two end faces of the support body 2, and the cutter head support base 4.
It is detachably attached to the storage container 60 by a support leg 74 fixed to one location on the outer surface. The funnel-shaped guide member 75 through which the instrumentation pipe 11 can be easily inserted has its central axis almost overlapping the upper extension of the vertical central axis of the storage container 60, and is located somewhat above the fixed pedestal 3 and the cutter head support 4. It is fixed to the support body 2 via the mounting legs 76 so as to be positioned in the same position.
この発明による切断処理装置５０を使用し計装管を切断
処理するこの発明による方法を、第４図につき第３図を
参照しつつ次に説明する。A method according to the invention for cutting instrumentation tubes using a cutting apparatus 50 according to the invention will now be described with reference to FIG. 3 in conjunction with FIG.
初めに、原子炉圧力Ｇ１１１２中の炉心部１３の所定位
置に、切断処理装置５０をその収納容器６０を下方にし
て、適宜の図示しない荷役装置によりつり手７１．７２
を介してつり降ろし挿入する。炉心部１３中に上端を上
部格子板１４にその下方中間部を炉心支持板１５により
支承され、下端部を原子炉圧力容器１２の下方に突出さ
せて、炉心部１３に鉛直に挿入されている計装管１１の
上端部を、図示しない荷投機のワイヤロープ下端に懸下
された取扱い具１６により把持し、計装管１１を、その
下端が切断処理装［５０の上端より幾分上方に位置する
までつり揚げ、原子炉ウェル１７の冷却水２０中を切断
具７０の案内部材７５の直上に来るように移動する。次
に、計装管１１の下端が収納容器６０中所望深さに達す
るまで案内部材７５を通して計装管１１をつり降ろしそ
の位置に保持し、流体管路６を経て圧力流体をカッタヘ
ッド支持台４中に送入すれば、カッタヘッド５はカッタ
ヘッド支持台４に対し突出し、押切形カッタ８は、計装
管１１を固に受台３に押しつけ切断し、計装管１１の切
断片は収納容器６０中に収納される。続いて、カッタヘ
ッド支持台４に送入される圧力流体の入口管路は流体管
路６から流体管路７に切り換えられ、カッタヘッド５は
カッタヘッド支持台４に対し引き込み原位置に復帰する
。通常的１４ｔｎの長さを有する計装管１１は、輸送上
の必要から４ｍ以下の長さの切断片に切断されるが、前
記計装管１１の収納容器６０中所望深さまでのつり降ろ
し、切断作業、カッタヘッド５の原位置復帰操作は、計
装管１１が総て４ｍ以下の切断片になるまで繰り返され
、最後に計装管１１の上端部の取扱い具１６による把持
が解放され、その部分も収納容器６０中に収納される。First, the cutting device 50 is placed at a predetermined position in the reactor core 13 under the reactor pressure G1112, with its storage container 60 facing downward, and the lifting handles 71.72 are placed using an appropriate cargo handling device (not shown).
Insert it by suspending it through. It is vertically inserted into the reactor core 13 with its upper end supported by an upper grid plate 14 and its lower middle part supported by a core support plate 15, with its lower end protruding below the reactor pressure vessel 12. The upper end of the instrumentation pipe 11 is held by a handling tool 16 suspended from the lower end of a wire rope of a speculator (not shown), and the instrumentation pipe 11 is held so that its lower end is slightly above the upper end of the cutting device [50]. The cutting tool 70 is lifted up until the cutting tool 70 is located in the cooling water 20 of the reactor well 17, and moved to be directly above the guide member 75 of the cutting tool 70. Next, the instrumentation tube 11 is lowered and held in that position through the guide member 75 until the lower end of the instrumentation tube 11 reaches a desired depth in the storage container 60, and the pressure fluid is supplied to the cutter head support via the fluid conduit 6. 4, the cutter head 5 protrudes from the cutter head support 4, the push-cut cutter 8 firmly presses the instrumentation tube 11 against the pedestal 3, and cuts the instrumentation tube 11. It is stored in a storage container 60. Subsequently, the inlet line for the pressurized fluid sent to the cutter head support base 4 is switched from the fluid line 6 to the fluid line 7, and the cutter head 5 is pulled into the cutter head support base 4 and returned to its original position. . The instrumentation pipe 11 having a length of 14 tn is usually cut into pieces having a length of 4 m or less due to transportation needs. The cutting operation and the operation of returning the cutter head 5 to its original position are repeated until all of the instrumentation tubes 11 are cut into pieces of 4 m or less, and finally the upper end of the instrumentation tube 11 is released from the grip by the handling tool 16. That part is also stored in the storage container 60.
続いて、図示しない他の計装管についても前記計装管１
１に対する各作業操作と同一の作業操作を繰り返し所望
の本数の計装管全部が切断されて収納容器６０中に収納
されたとき、切断処理装置５０を計装管切断片がその収
納容器６０中に収納されたまま、炉心部１３から図示し
ない公知手段でつり揚げ冷却水２０中を横移動し原子炉
ウェル１７に隣接する図示しない核燃料貯蔵プール（第
２図の核燃料貯蔵プール１８に該当）内につり降ろし定
置して作業を終える。Subsequently, the instrumentation pipe 1 is also applied to other instrumentation pipes (not shown).
When the same work operations as those for 1 are repeated and all the desired number of instrumentation tubes are cut and stored in the storage container 60, the cutting processing device 50 is used to transfer the cut pieces of the instrumentation tubes into the storage container 60. While stored in the reactor well 17, it is lifted from the reactor core 13 by a known means (not shown) and moved laterally through the cooling water 20 into a nuclear fuel storage pool (not shown) adjacent to the reactor well 17 (corresponding to the nuclear fuel storage pool 18 in FIG. 2). Lower it and set it in place to finish the work.
この発明による計装管の切断処理方法とその装置によれ
ば、切断処理装置は、計装管が鉛直に挿入できる無蓋有
底筒形の収納容器と、この収納容器の上端部に取り付け
られその部位で下端が収納容器中に挿入された計装管を
切断できる切断具と、を備え、原子炉圧力容器内炉心部
定位置に着脱自在に挿入装着可能な形状に構成されるの
で、この切断処理装置を初めに炉心部足位置に取り付け
、゛炉心部中の計装管を取扱い具によりその上端部を把
持し原子炉ウェルの冷却水中でつり揚げて切断処理装置
の直上に移動し、計装管の下端が収納容器中所望深さに
達するまで計装管をつり降ろしてその位置に保持し、切
断共を作動させれば、その部位で計装管は切断され、計
装管のつり降ろし切断を所要回数繰り返した後計装管の
取扱い具による上端部把持を解放することにより、計装
管は短かく切断されて切断片は総て収納容器中に収納さ
れ、所望本数の計装管の切断収納作業を繰り返した後に
、計装管切断片・が総で収納容器内に収納された切断処
理装置を核燃料貯蔵プール中所定場所に移置することに
より作業を終えるので、計装管は全作業工程中つかみ変
えの必要が全くなく、切断具は定置されていて移動する
必要がなく、更に計装管切断片は自重により自動的に収
納容器中に収納されるので、作業は極めて容易簡単とな
り作業工数が著しく節減される効果がある。更に、切断
前の計装管は、その上端部のみを取扱い具に把持されて
鉛直の姿勢の才ま冷却水中を移動されるので、高放射性
を帯びた計装管が冷却水面に島田される虞れがなく、前
記作業工数の著しい節減と相まって、作業員の放射線被
ばくを防止できる効果がある。According to the method and device for cutting an instrumentation tube according to the present invention, the cutting device includes a cylindrical storage container with an open bottom into which an instrumentation tube can be inserted vertically, and a storage container that is attached to the upper end of the storage container. It is equipped with a cutting tool whose lower end can cut the instrumentation tube inserted into the storage vessel, and is configured in a shape that can be removably inserted into a fixed position in the core of the reactor pressure vessel. First, the processing equipment is attached to the foot position of the reactor core, and the upper end of the instrumentation tube in the reactor core is grasped with a handling tool, lifted into the cooling water of the reactor well, and moved directly above the cutting processing equipment. Lower the instrumentation tube until the lower end of the instrumentation tube reaches the desired depth in the storage container, hold it in that position, and operate the cutting mechanism.The instrumentation tube will be cut at that point, and the instrumentation tube will be suspended After repeating the lowering and cutting the required number of times, the upper end grip of the instrumentation tube handling tool is released, and the instrumentation tube is cut into short pieces and all the cut pieces are stored in the storage container, allowing the desired number of instrumentation tubes to be installed. After repeating the pipe cutting and storage work, the work is completed by moving the cutting processing device, which contains all the cut pieces of the instrumentation pipe in the storage container, to a predetermined location in the nuclear fuel storage pool. There is no need to change the grip during the entire work process, the cutting tool remains stationary and does not need to be moved, and the cut piece of instrumentation pipe is automatically stored in the storage container by its own weight, making the work extremely easy. It is easy and simple and has the effect of significantly reducing the number of work steps. Furthermore, since the instrumentation tube before cutting is moved through the cooling water in a vertical position with only its upper end held by a handling tool, the highly radioactive instrumentation tube is exposed to the surface of the cooling water. There is no risk, and in combination with the remarkable reduction in the number of work hours, there is an effect of preventing radiation exposure of workers.
第１図、第２図は使用済み原子炉内計装管のそれぞれ従
来の切断処理装置の斜視図、切断処理方法の実施図、第
３図、第４図は使用済み原子炉内計装管のそれぞれこの
発明による切断処理装置の斜視図、切断処理方法の実施
図である。
２・・・支持本体、３・・・固定受台、４・・・カッタ
ヘッド支持台、５・・・カッタヘッド、８・・・押切形
カッタ、１１・・・使用済み原子炉内計装管、１２・・
・原子炉圧力容器、１３・・・炉心部、１６・・計装管
取扱い具、１７・・・原子炉ウェル、１８・・・核燃料
貯蔵プール、２０・・冷却水、５０・・・切断処理装置
、６０・・・収納容器、７０・・・切断共。
（７３１７） 代理人 弁理士 則近憲佑（ほか１名）
第３図Figures 1 and 2 are a perspective view of a conventional cutting processing device for used in-reactor instrumentation pipes, and an implementation diagram of a cutting processing method, and Figs. 3 and 4 are used in-reactor instrumentation pipes. FIG. 1 is a perspective view of a cutting device and an implementation diagram of a cutting method according to the present invention, respectively. 2... Support body, 3... Fixed pedestal, 4... Cutter head support stand, 5... Cutter head, 8... Push cutter, 11... Used reactor instrumentation Tube, 12...
・Reactor pressure vessel, 13...Reactor core, 16...Instrumentation tube handling tool, 17...Reactor well, 18...Nuclear fuel storage pool, 20...Cooling water, 50...Cutting process Device, 60... Storage container, 70... Cutting. (7317) Agent Patent attorney Kensuke Norichika (and 1 other person) Figure 3
Claims (3)
組み合わされた使用済み原子炉内計装管の切断処理装置
を原子炉圧力容器内炉心部の定位置に着脱自在に取り付
け、前記炉心部に鉛直に挿入されている使用済み原子炉
内計装管をその上端部において計装管取扱い具により把
持し、前記圧力容器及びその上方部の原子炉ウェルの冷
却水中で前記計装管をその下端が前記切断処理装置の上
方に位置するまでつり揚げ前記収納容器の直上に来るよ
うに横移動し、次いで前記計装管をその下端が前記収納
容器中所望の深さに達するまで下降させてその位置に保
持し、前記切断具を作用させて前記計装管をその長さ方
向所望位置で切断しその被切断下方部を前記収納容器中
に収納し、前記計装管につき前記下降切断収納作業を所
定回数繰り返した後、残°った前記計装管の上端部を前
記取扱い具による把持から解放して前記収納容器中に収
納し、所望の本数の他の使用済み原子炉内計装管につい
ても前記計装管についての前記取扱い具による把持から
前記収納容器中への収納に至る前記各作業を繰り返し、
切断された所望本数の前記計装管が収納されている前記
切断処理装置を、前記炉心部からつり揚げて取り外し、
前記原子炉ウェル及び原子炉ウェルに隣接する核燃料貯
蔵プールの冷却水中を移動し、この核燃料貯蔵プール中
につり降ろし定置貯留する使用済み原子炉内計装管の切
断処理方法。(1) A used reactor instrumentation tube cutting device, in which a storage container and a cutting device are integrated with the cutting tool upward, is removably attached to a fixed position in the core of the reactor pressure vessel; A used reactor instrumentation tube inserted vertically into the reactor core is held at its upper end by an instrumentation tube handling tool, and the instrumentation tube is placed in the cooling water of the pressure vessel and the reactor well above it. Lift the tube until its lower end is above the cutting device and move it laterally so that it is directly above the storage container, and then move the instrumentation tube until its lower end reaches the desired depth in the storage container. The instrumentation tube is lowered and held at that position, and the cutting tool is operated to cut the instrumentation tube at a desired position in the length direction, and the lower part to be cut is stored in the storage container, and the instrumentation tube is cut at a desired position in the length direction. After repeating the lowering cutting and storing operation a predetermined number of times, the remaining upper end of the instrumentation tube is released from the grip of the handling tool and stored in the storage container, and the desired number of the remaining instrumentation tubes are removed from other used reactor reactors. Repeating each of the operations for the internal instrumentation tube from gripping it with the handling tool to storing it in the storage container,
lifting and removing the cutting device in which a desired number of cut instrumentation tubes are stored, from the reactor core;
A method for cutting a used nuclear reactor instrumentation pipe, which is moved through the cooling water of the reactor well and a nuclear fuel storage pool adjacent to the reactor well, and is lowered into the nuclear fuel storage pool and stored therein.
部に取り付けられ収納容器の鉛直中心軸線方向に沿って
上方から収納容器中に挿入され鉛直に保持される使用済
み原子炉内計装管を所定位置で切断できる切断具とを備
え、原子炉圧力容器内炉心部所定位置に着脱自在に挿入
装着可能な形状を有する使用済み原子炉内計装管の切断
処理装置。(2) A cylindrical storage container with an open bottom and a used nuclear reactor that is attached to the upper end of the storage container and is inserted into the storage container from above along the vertical central axis direction of the storage container and held vertically. A cutting device for a used nuclear reactor instrumentation tube, which is equipped with a cutting tool capable of cutting an instrumentation tube at a predetermined position, and has a shape that can be detachably inserted into a predetermined position in a reactor core in a reactor pressure vessel.
を中に挾みほぼ水平方向に対向して前記支持本体に取り
付けられた固定受台とカッタヘッド支持台とを備え、こ
のカッタヘッド支持台が、このカッタヘッド支持台と前
記固定受台との間に鉛直に保持される使用済み原子炉内
計装管を押し切ることができる押切形カッタを固定受台
に対向する一端に固着されたカッタヘッドを固定受台に
接近離遠する方向に移動自在に支承すると共に、この移
動のための移動機構を備えていることを特徴とする特許
請求の範囲第２項に記載の使用済み原子炉内計装管の切
断処理装置。(3) The cutting tool includes a support body, a fixed pedestal and a cutter head support base that are attached to the support body so as to sandwich the vertical center axis of the storage container and face each other in a substantially horizontal direction; The head support is fixed to one end facing the fixed pedestal with a push-cut cutter capable of pushing off a used reactor instrumentation pipe held vertically between the cutter head support and the fixed pedestal. The used cutter head according to claim 2, wherein the used cutter head is supported movably in a direction toward and away from a fixed pedestal, and is provided with a moving mechanism for this movement. A cutting device for instrumentation tubes inside a nuclear reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59000865A JPS60144695A (en) | 1984-01-09 | 1984-01-09 | Method and device for cutting and treating used nuclear reactor internal instrumentaion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59000865A JPS60144695A (en) | 1984-01-09 | 1984-01-09 | Method and device for cutting and treating used nuclear reactor internal instrumentaion pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60144695A true JPS60144695A (en) | 1985-07-31 |
Family
ID=11485563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59000865A Pending JPS60144695A (en) | 1984-01-09 | 1984-01-09 | Method and device for cutting and treating used nuclear reactor internal instrumentaion pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60144695A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012083259A (en) * | 2010-10-13 | 2012-04-26 | Chugoku Electric Power Co Inc:The | Storage method of radioactive waste |
| JP2016502111A (en) * | 2012-12-28 | 2016-01-21 | ジーイー−ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシーＧｅ−Ｈｉｔａｃｈｉ Ｎｕｃｌｅａｒ Ｅｎｅｒｇｙ Ａｍｅｒｉｃａｓ， Ｌｌｃ | System and method for disposing of one or more radioactive parts from a nuclear power plant reactor |
-
1984
- 1984-01-09 JP JP59000865A patent/JPS60144695A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012083259A (en) * | 2010-10-13 | 2012-04-26 | Chugoku Electric Power Co Inc:The | Storage method of radioactive waste |
| JP2016502111A (en) * | 2012-12-28 | 2016-01-21 | ジーイー−ヒタチ・ニュークリア・エナジー・アメリカズ・エルエルシーＧｅ−Ｈｉｔａｃｈｉ Ｎｕｃｌｅａｒ Ｅｎｅｒｇｙ Ａｍｅｒｉｃａｓ， Ｌｌｃ | System and method for disposing of one or more radioactive parts from a nuclear power plant reactor |
| US10090071B2 (en) | 2012-12-28 | 2018-10-02 | Ge-Hitachi Nuclear Energy Americas Llc | Systems and methods for disposing of one or more radioactive components from nuclear reactors of nuclear plants |
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