JPS62245991A - Bulk head contamination preventive device in nuclear reactorwell - Google Patents
Bulk head contamination preventive device in nuclear reactorwellInfo
- Publication number
- JPS62245991A JPS62245991A JP61088172A JP8817286A JPS62245991A JP S62245991 A JPS62245991 A JP S62245991A JP 61088172 A JP61088172 A JP 61088172A JP 8817286 A JP8817286 A JP 8817286A JP S62245991 A JPS62245991 A JP S62245991A
- Authority
- JP
- Japan
- Prior art keywords
- bulkhead
- cover
- reactor well
- adhesive tape
- tape
- 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
- 238000011109 contamination Methods 0.000 title claims description 10
- 230000003449 preventive effect Effects 0.000 title description 2
- 239000002390 adhesive tape Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000002265 prevention Effects 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 238000005202 decontamination Methods 0.000 description 7
- 230000003588 decontaminative effect Effects 0.000 description 7
- 238000007689 inspection Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
- Gasket Seals (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】
（関連技術分野）
本発明は原子炉ウェルにおけるバルクヘッド汚染防止装
置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Related Technical Field) The present invention relates to a bulkhead contamination prevention device in a nuclear reactor well.
（従来波ｖＲ）
原子炉設備はその安全性確保の為に定期検査（以下定検
という）が行われる。この定検工事の施工に当っては、
安全性の確保、作業員が受ける被爆線量の低減及び工期
の短縮を図る必要がある。(Conventional wave vR) Periodic inspections (hereinafter referred to as periodic inspections) are performed on nuclear reactor equipment to ensure their safety. When carrying out this periodic inspection work,
It is necessary to ensure safety, reduce the radiation dose received by workers, and shorten the construction period.
定検において原子炉ウェル除染に壁面用の壁面除染機を
導入したことにより、効果的な除染工事を施工すること
ができた。By introducing a wall decontamination machine for walls to decontaminate the reactor well during periodic inspections, we were able to carry out effective decontamination work.
これに対しバルクヘッドの除染には効果的な工法を見い
出せず、手作業により除染をしていた。However, no effective method could be found for decontaminating the bulkhead, and decontamination was carried out manually.
しかし、手作業による除染作業は非常に困難である。However, manual decontamination work is extremely difficult.
（発明の解決しようとする問題点）
このような困難なバルクヘッドの除染作業を省略、もし
くは簡易化し、確実な除染工事を短い工期でしかも安全
に行いうるようにすることを目的とするものである。(Problem to be solved by the invention) The purpose is to omit or simplify such difficult bulkhead decontamination work, and to ensure that decontamination work can be carried out safely in a short period of time. It is something.
即ち、従来は定検工事に際しまずバルクヘッド上の構造
物等を取り外したのち、炉内に炉水を張り、この状態で
炉心部の燃料棒の交換をしていた。That is, conventionally, during regular inspection work, structures on the bulkhead were first removed, then reactor water was filled into the reactor, and fuel rods in the reactor core were replaced in this state.
燃料棒の交換を終了したならば、炉から炉水を除去し、
汚染した炉壁及びバルクヘッド部の洗浄をする必要があ
ったが１本発明は、バルクヘッドが最初に汚染されてい
ない状態のときにこの部分を水密に覆ってクラッド等に
よるこの部分の汚染を防止し、バルクヘッドの除染作業
を不要なものにしようとするものである。After replacing the fuel rods, remove the reactor water from the reactor,
It was necessary to clean the contaminated reactor wall and bulkhead, but in the present invention, when the bulkhead is initially uncontaminated, this area is covered watertight to prevent contamination of this area by crud, etc. The aim is to prevent this and make bulkhead decontamination work unnecessary.
（発明による解決手段）
第１の解決手段は、原子炉ウェルに於るバルクヘット上
にゴムシート等の防水性皮膜製カバーを布き、該カバー
の内周及び外周を粘着テープで水密にシールした。(Solution by the Invention) The first solution is to cover the bulkhead in the reactor well with a waterproof film cover such as a rubber sheet, and seal the inner and outer peripheries of the cover watertight with adhesive tape. .
第２の解決手段は、原子炉ウェルに於るバルクヘッド上
にゴムシート等の防水性皮膜製カバーを布き、該カバー
の内周及び外周を粘着テープで水密にシールし、前記バ
ルクヘッドと前記カバーとの間１；清水を注入するよう
にした。The second solution is to place a waterproof film cover such as a rubber sheet over the bulkhead in the reactor well, seal the inner and outer circumferences of the cover watertight with adhesive tape, and connect the bulkhead to the reactor well. Between the cover and the cover 1: Fresh water was injected.
そして第３の解決手段は原子炉ウェルに於るバルクヘッ
ド上にゴムシート等の防水性皮膜製カバーを布き、バル
クヘッドとカバーの間に清水を注入することによりバル
クヘッドの汚染を防止するものであって、前記ゴム製カ
バーは５つの分割片ａ１〜ａ、からなり、各分割片はそ
の隣接部に防水性ファスナーをとりつけるか、もしくは
粘着テープで接続するようにし、下面にバルクヘッド上
に固着するためのマジックテープが取付けられ、さらに
内・外周をテープで壁面及びバルクヘッド上にシールす
るようにした。The third solution is to prevent contamination of the bulkhead by placing a waterproof film cover such as a rubber sheet over the bulkhead in the reactor well and injecting clean water between the bulkhead and the cover. The rubber cover consists of five divided pieces a1 to a, each divided piece is attached to its adjacent part with a waterproof zipper or connected with an adhesive tape, and the lower surface is attached to the bulkhead. Velcro tape was attached to secure it to the wall, and the inner and outer peripheries were sealed with tape to the wall and bulkhead.
（第１実施例）
原子炉ウェルに於るバルクヘッドが最初に汚染されない
状態のときこの上にゴムシート等の防水性皮膜製カバー
を布き、該カバーの内周及び外周を粘着テープで水密に
シールする。この状態で炉内に水を張る。(First example) When the bulkhead in the reactor well is initially in an uncontaminated state, a waterproof film cover such as a rubber sheet is placed over it, and the inner and outer peripheries of the cover are made watertight with adhesive tape. Seal it. In this state, fill the furnace with water.
（第２実施例）
原子炉ウェルに於るバルクヘッドが最初に汚染されない
状態のとき、この上にゴムシート等の防水性皮膜製カバ
ーを布き、該カバーの内周及び外周を粘着テープで水密
にシールする０次にバルクヘッドと前記カバーとの間に
清水を注入する。この状態にしたのち炉内に水を張って
作業をする。(Second Example) When the bulkhead in the reactor well is initially uncontaminated, a waterproof film cover such as a rubber sheet is placed over it, and the inner and outer peripheries of the cover are covered with adhesive tape. Fresh water is injected between the bulkhead and the cover to form a watertight seal. After this condition is reached, the furnace is filled with water and work is carried out.
（第３実施例）
この実施例は上記２つの実施例による汚染防止装置をさ
らに作業し易くしたものである。以下図に基いて説明す
る。第１図はバルクヘッド部に本発明に係るカバーＡを
かぶせた状態の平面図である。図で明らかなように、バ
ルクヘッド部は多くの凹凸があり、これを手作業で除染
作業するのは容易なことではない。(Third Embodiment) In this embodiment, the contamination prevention device according to the above two embodiments is made easier to operate. This will be explained below based on the figures. FIG. 1 is a plan view of a bulkhead portion covered with a cover A according to the present invention. As is clear from the figure, the bulkhead has many irregularities, and it is not easy to decontaminate it manually.
そこで図の如く、バルクヘッド部を５分割しこれら５つ
の部分を覆うための５つのゴムシート等の防水性皮膜よ
りなるカバー片ａｉｔ ａｎｙ ａｔｌａ４Ｐ ａ、を
予めつくり、これらを防水性ファスナーで接続してカバ
ーＡを構成したのが本発明である。Therefore, as shown in the figure, the bulkhead section is divided into five parts, and five cover pieces made of waterproof membranes such as rubber sheets are made in advance to cover these five parts, and these are connected with waterproof fasteners. According to the present invention, the cover A is configured as follows.
ａｌとａ、は夫々第１図の左半分の９０’宛をカバーす
るカバー片％ ａ３＊ ８４は図の右半分の中央部のａ
、の部分を除いた上と下を覆うカバー片である。al and a are the cover pieces that cover the area 90' in the left half of Figure 1. a3* 84 is the cover piece a in the center of the right half of Figure 1.
This is a cover piece that covers the top and bottom except for the .
これらカバー片は１〜５の５ケ所で防水性ファスナーで
互に連結されている。なお連結部は防水ファスナーに限
定するものではなく、粘着テープによる連結も可能であ
る。These cover pieces are connected to each other at five locations numbered 1 to 5 using waterproof fasteners. Note that the connection portion is not limited to a waterproof fastener, and connection using an adhesive tape is also possible.
第２図は本兄明に係るカバーＡの一部切断斜視図である
。カバーＡは最初は平面状の防水性皮膜例えばゴムシー
トであるが、バルクヘッド上に載置し、バルクヘッド上
の凹凸になじませたのちは。FIG. 2 is a partially cutaway perspective view of the cover A according to the present invention. Cover A is initially a flat waterproof film, such as a rubber sheet, but after it is placed on the bulkhead and adapted to the irregularities on the bulkhead.
外周に立上り接着部６が形成されるようにし、この部分
を接着テープでシールする。又内周部には炉心に近い水
平接着部７が接着テープでシールされるゆ
又カバーＡの中央部下面には第３図に示す如きマジック
テープ８がとりつけられている・このマジックテープ８
は片面に母材との接着面８ａを有し、これと反対側にバ
ルクヘッド側への接着面８ｂを有している。そして最初
はマジックテープ同志が付いた状態で母材側に粘着面保
護テープ８Ｃをはがして接着されている。そして、カバ
ーＡをバルクヘッド部に取付けるときは、バルクヘッド
側の適所にベーステープ９を貼り、この上に反対側マジ
ックテープの接着面８ｂを接着してとりつけるようにな
っている（第４図）。A rising adhesive part 6 is formed on the outer periphery, and this part is sealed with adhesive tape. In addition, on the inner periphery, a horizontal adhesive part 7 near the core is sealed with adhesive tape.A magic tape 8 as shown in FIG. 3 is attached to the central lower surface of the Yumata cover A.
has an adhesion surface 8a to the base material on one side, and an adhesion surface 8b to the bulkhead side on the opposite side. Initially, the adhesive surface protection tape 8C is peeled off and adhered to the base material side with the Velcro tape attached. When attaching the cover A to the bulkhead part, the base tape 9 is pasted on the bulkhead side, and the adhesive surface 8b of the opposite Velcro tape is glued onto this (see Fig. 4). ).
第２図で１０は給水ライン、１１は排気ラインで、夫々
カバーＡに設けた開口に固層したノズル１２を介し配設
されている。In FIG. 2, 10 is a water supply line, and 11 is an exhaust line, each of which is installed through a nozzle 12 fixed in an opening provided in the cover A.
第５図はバルクヘッド上の突起物まわりの処理構造を示
し、この場合はスリーブ１３をカバーＡ上に設けておく
。そしてこのスリーブ１３を突起物に通したのち、紐１
４で結束したのち、さらに接着テープ１５でシールする
。FIG. 5 shows the processing structure around the protrusion on the bulkhead, in which case the sleeve 13 is provided on the cover A. After passing this sleeve 13 through the protrusion, the string 1
4, and then further sealed with adhesive tape 15.
（第３実施例の作業手順） １）準位作業 資機材をウェルフロアに搬入し、バリアを設営する。(Working procedure of the third embodiment) 1) Level work Transport materials and equipment to the well floor and set up barriers.
２）カバーＡによるカバーリング
ａ）各ゴムシートａ１〜ａ、をバルクヘッド上に降ろす
。2) Covering with cover A a) Lower each rubber sheet a1 to a onto the bulkhead.
ｂ）各ゴムシートａ１〜ａ、をバルクヘッド上で広げ、
所定の場所に仮置きする。b) Spread each rubber sheet a1 to a on the bulkhead,
Temporarily place it in the designated place.
Ｃ）バルクヘッド突起物は、スリーブ１３を通して紐１
４で結束する。C) The bulkhead protrusion passes the string 1 through the sleeve 13.
Finish with 4.
ｄ）緊急時通水口及び空気抜き口を取付け、スリーブ１
３を通して紐で結束する。d) Attach the emergency water inlet and air vent, and remove sleeve 1.
3 and tie with string.
ｅ）各シートａ□〜ａ、を防水ファスナー１〜５で接続
する。e) Connect each sheet a□ to a with waterproof fasteners 1 to 5.
ｆ）各ノズル１２に給水ライン１０．排気ライン１１を
接続する。f) Water supply line 10 to each nozzle 12. Connect the exhaust line 11.
ｇ）ゴムシートＡの内外側部分をテープ８でシールする
。g) Seal the inner and outer parts of rubber sheet A with tape 8.
ｈ）空気を抜きながら注水する。h) Pour water while removing air.
３）カバー撤去
ａ）各ノズル１２を切り離し、スリーブ１３の紐１４を
解く。3) Cover removal a) Separate each nozzle 12 and untie the string 14 of the sleeve 13.
ｂ）接着テープを剥ぎ取る。b) Peel off the adhesive tape.
Ｃ）防水ファスナ１〜５を外し、各シートａｉ〜ａｓを
折りたたむ。C) Remove waterproof fasteners 1-5 and fold each sheet ai-as.
４）後片付け ａ）機材を養生し搬出する。4) Cleaning up afterwards a) Curing and transporting equipment.
ｂ）廃棄物を搬出する。b) Transport waste.
（効果）
バルクヘッド上にゴムシート等の防水性皮膜のカバーを
布くか、あるいはさらにバルクヘッドと、カバーの間に
清水を注入することによってクラッドが直接にバルクヘ
ッドに接触したり沈積することを防止するようにしたの
で、定検工事の短縮を図ることができ確実な汚染防止が
可能となった。(Effect) Placing a waterproof film cover such as a rubber sheet over the bulkhead, or injecting clean water between the bulkhead and the cover, will prevent the cladding from directly contacting or depositing on the bulkhead. By preventing this, regular inspection work can be shortened and contamination can be reliably prevented.
第３実施例の如く、カバーを分割型にすることにより、
バルクヘッド上に複雑な凹凸形状が存在しても容易に取
付けが可能となった。By making the cover a split type as in the third embodiment,
Even if there are complex uneven shapes on the bulkhead, it can be easily installed.
さらに廃棄物の減少１作業員の被爆線量を低減すること
が可能となり、その効果は甚だ大きいものがある。Furthermore, it becomes possible to reduce the amount of radiation that workers are exposed to due to the reduction in waste, which has a tremendous effect.
第１図は本発明に係るカバーをした状態のバルクヘッド
部の平面図。
第２図はカバーＡの斜視図。
第３図は母材に取付けるマジックテープの斜視図。
第４図はマジックテープの施工方法の説明図。
第５図はバルクヘッド部の突出部周辺の力／＜ −の構
造を示す。
図において；
Ａ （防水性皮膜よりなる）カバー
ａ１〜ａ、 カバーの分割片
１〜５ 防止性ファスナー
６ 立上り接着部 ７ 内周接着部
８ マジックテープ ８ａ 母材との接着面８ｂ
バルクヘッド側の接着面
８ｃ 粘着面保護テープ
９ ベーステープ １０ 給水ライン１１ 排気
ライン １２ ノズル１３ スリーブ
１４ 紐
１５ 接着テープ
以上FIG. 1 is a plan view of the bulkhead section with a cover according to the present invention. FIG. 2 is a perspective view of cover A. Figure 3 is a perspective view of the Velcro tape attached to the base material. Figure 4 is an explanatory diagram of the Velcro installation method. FIG. 5 shows the structure of force/<- around the protrusion of the bulkhead. In the figure: A Covers a1 to a (made of waterproof film) Cover divisions 1 to 5 Preventive fastener 6 Standing adhesive part 7 Inner periphery adhesive part 8 Velcro 8a Adhesive surface to base material 8b
Bulkhead side adhesive surface 8c Adhesive surface protective tape 9 Base tape 10 Water supply line 11 Exhaust line 12 Nozzle 13 Sleeve
14 String 15 Adhesive tape or more
Claims (1)
膜製カバーを布き、該カバーの内周及び外周を粘着テー
プで水密にシールしたことを特徴とする原子炉ウェルに
於るバルクヘッド汚染防止装置。 ［II］原子炉ウェルに於るバルクヘッド上に防水性皮膜
製カバーを布き、該カバーの内周及び外周を粘着テープ
で水密にシールし、前記バルクヘッドと前記カバーとの
間に清水を注入することを特徴とする原子炉ウェルに於
るバルクヘッド汚染防止装置。 ［III］子炉ウェルに於るバルクヘッド上に防水性皮膜
製カバーを布き、バルクヘッドとカバーの間に清水を注
入することによりバルクヘッドの汚染を防止するもので
あって、前記ゴム製カバーは５つの分割片（ａ＿１〜ａ
＿５）からなり、各分割片はその隣接部に防水性ファス
ナーをとりつけるか、もしくは粘着テープで接続するよ
うにし、下面にバルクヘッド上に固着するためのマジッ
クテープが取付けられ、さらに内・外周をテープで壁面
及びバルクヘッド上にシールするようにしたことを特徴
とする原子炉ウェルに於るバルクヘッド汚染防止装置。[Claims] [I] A nuclear reactor characterized in that a waterproof film cover is placed over the bulkhead in a reactor well, and the inner and outer peripheries of the cover are sealed watertight with adhesive tape. Bulkhead contamination prevention equipment in wells. [II] A waterproof membrane cover is placed over the bulkhead in the reactor well, the inner and outer peripheries of the cover are sealed watertight with adhesive tape, and clean water is placed between the bulkhead and the cover. A bulkhead contamination prevention device in a nuclear reactor well characterized by injection. [III] A waterproof film cover is placed over the bulkhead in the child reactor well, and clean water is injected between the bulkhead and the cover to prevent contamination of the bulkhead, and the rubber The cover is divided into 5 pieces (a_1~a
_5), each divided piece is attached to the adjacent part with a waterproof zipper or connected with adhesive tape, and a Velcro is attached to the bottom surface to fix it on the bulkhead, and the inner and outer peripheries are A bulkhead contamination prevention device in a nuclear reactor well, characterized in that the wall surface and bulkhead are sealed with tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61088172A JPS62245991A (en) | 1986-04-18 | 1986-04-18 | Bulk head contamination preventive device in nuclear reactorwell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61088172A JPS62245991A (en) | 1986-04-18 | 1986-04-18 | Bulk head contamination preventive device in nuclear reactorwell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62245991A true JPS62245991A (en) | 1987-10-27 |
| JPH0431556B2 JPH0431556B2 (en) | 1992-05-26 |
Family
ID=13935494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61088172A Granted JPS62245991A (en) | 1986-04-18 | 1986-04-18 | Bulk head contamination preventive device in nuclear reactorwell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62245991A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55106895U (en) * | 1979-01-23 | 1980-07-25 | ||
| JPS5869299U (en) * | 1981-10-31 | 1983-05-11 | 東芝プラント建設株式会社 | Contamination spread prevention member attached to work shoes |
| JPS58178291A (en) * | 1982-04-12 | 1983-10-19 | 株式会社東芝 | Seal device of reactor well |
| JPS61253496A (en) * | 1985-05-02 | 1986-11-11 | 三菱重工業株式会社 | Method of preventing contamination of inner surface of nuclear power cavity |
-
1986
- 1986-04-18 JP JP61088172A patent/JPS62245991A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55106895U (en) * | 1979-01-23 | 1980-07-25 | ||
| JPS5869299U (en) * | 1981-10-31 | 1983-05-11 | 東芝プラント建設株式会社 | Contamination spread prevention member attached to work shoes |
| JPS58178291A (en) * | 1982-04-12 | 1983-10-19 | 株式会社東芝 | Seal device of reactor well |
| JPS61253496A (en) * | 1985-05-02 | 1986-11-11 | 三菱重工業株式会社 | Method of preventing contamination of inner surface of nuclear power cavity |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0431556B2 (en) | 1992-05-26 |
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| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |