JPS59112286A - Waterproof protective cover for stud bolts of reactor pressure vessel - Google Patents
Waterproof protective cover for stud bolts of reactor pressure vesselInfo
- Publication number
- JPS59112286A JPS59112286A JP57221883A JP22188382A JPS59112286A JP S59112286 A JPS59112286 A JP S59112286A JP 57221883 A JP57221883 A JP 57221883A JP 22188382 A JP22188382 A JP 22188382A JP S59112286 A JPS59112286 A JP S59112286A
- Authority
- JP
- Japan
- Prior art keywords
- protective cover
- pressure vessel
- waterproof
- stud bolts
- reactor pressure
- 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
- Pressure Vessels And Lids Thereof (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】
〔発明の利用分野〕
本発明は原子炉圧力容器に係シ、特にその胴体７ランジ
部のスタッドボルトおよびねじ穴の防水保護カバーに関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a nuclear reactor pressure vessel, and more particularly to a waterproof protective cover for stud bolts and screw holes in a flange portion of a fuselage 7 thereof.
第１．２図は原子炉圧力容器の周辺を示すそれぞれ平面
図、正面図であシ、第３図はその胴体フランジ部のスタ
ッドボルトおよびねじ大の従来の防水保護カバーを示す
縦断面図である。Figures 1 and 2 are a plan view and a front view, respectively, showing the vicinity of the reactor pressure vessel, and Figure 3 is a vertical sectional view showing the stud bolts on the fuselage flange and a conventional waterproof protective cover with a screw size. be.
原子カプラントの定期検査において、原子炉圧力容器１
の胴体７ランジ部２は、燃料交換のため原子ウェル３お
よび燃料貯蔵プール４に水張シするため冠水状態になる
。During a periodic inspection of the nuclear coupler, the reactor pressure vessel 1
The flange section 2 of the fuselage 7 becomes submerged in water because the atomic well 3 and fuel storage pool 4 are filled with water for fuel exchange.
このとき前記胴体フランジ部２のスタッドボルト５およ
び供用期間中検査のため取外されたスタッドボルトの胴
体フランジねじ穴６は、炉水への油脂外の混入が禁じら
れているため表面が清浄な状態で水没されるので、錆の
発生がさけられガい。At this time, the stud bolts 5 of the fuselage flange portion 2 and the fuselage flange screw holes 6 of the stud bolts that were removed for inspection during the service period must have clean surfaces because it is prohibited to mix anything other than oil or fat into the reactor water. Since it will be submerged in water, rust will be avoided.
最近の公知例では、前記スタッドボルト５に１本ずつ防
水キャップ７を被冠させ、前記ねじ穴６には第４図に示
す如く防水プラグ８を螺設して、燃料交換のための水張
シによシ水没り、ないようにする方法が提案されている
。この場合防錆効果および錆除去のだめの時間の短縮効
果はあるが、前記防水キャップ７が直径約２００φ、高
さ約６００調と大きいため、取付け、取外し作業に特別
な作業台が必要となる。また前記防水キャップ７を１本
ずつ取付け、取外しをするため時間がか＼シ、定検時間
の短縮、放射能被曝低減が図れない欠点があった。In a recent known example, each of the stud bolts 5 is covered with a waterproof cap 7, and a waterproof plug 8 is screwed into the screw hole 6 as shown in FIG. Methods have been proposed to prevent water from being submerged. In this case, although there is a rust prevention effect and an effect of shortening the time required for removing rust, the waterproof cap 7 is large with a diameter of about 200φ and a height of about 600mm, so a special workbench is required for the installation and removal work. In addition, since the waterproof caps 7 are attached and removed one by one, it takes time, and it is not possible to shorten regular inspection time or reduce radiation exposure.
本発明は上記事実に鑑みてなされたものであシ、スタッ
ドボルトおよび胴体フランジねじ大の防水作業を短時間
に行える防水保護カバーを提供するものである。The present invention has been made in view of the above facts, and it is an object of the present invention to provide a waterproof protective cover that can perform waterproofing work on stud bolts and body flange screws in a short time.
本発明は原子炉圧力容器のスタッドボルトの防水保護カ
バーにおいて、前種圧力容器胴体フランジ部の複数個の
スタッドボルトおよびねじ穴のすべて被覆する一体化さ
れた防水保護カバーを、前記スタッドボルトに固設する
ようにしたものである。The present invention provides a waterproof protective cover for stud bolts of a reactor pressure vessel, in which an integrated waterproof protective cover that covers all of a plurality of stud bolts and screw holes of a flange portion of a former pressure vessel body is fixed to the stud bolts. It was designed to be set up.
以下本発明に係る原子力圧力容器のスタッドボルトの防
水保護カバーの実施例を図面を参照して説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a waterproof protective cover for stud bolts of a nuclear pressure vessel according to the present invention will be described with reference to the drawings.
第５図は本発明の実施例による防水保護カバーの取付平
面図、第６，７図はそれぞれそのＡ −Ａ断面図、Ｂ−
Ｂ断面図、第８図は前記防水保護カバーをスタッドボル
トに固設した状態を示すＣ−Ｃ縦断面図である。FIG. 5 is an installation plan view of a waterproof protective cover according to an embodiment of the present invention, and FIGS. 6 and 7 are sectional views A-A and B-
B sectional view and FIG. 8 are CC longitudinal sectional views showing a state in which the waterproof protection cover is fixed to a stud bolt.
第５〜８図において防水保護カバー９は二重円筒状に形
成されており、原子炉圧力容器胴体７ランジ２の上部面
上においてスタッドボルト５および胴体フランジねじ穴
６を囲むように固設されている。このように一体化され
た前記防水保護カバー９と前記７ランジ２との当接部に
はパツキン１０が配設されており、この防水保護カバー
９は前記スタッドボルト５の頂部に形成されたねじ穴１
１に保脆カバーキャップ１２を介して数ケ所において螺
設締結されて、前記パツキン１０を圧縮して水密にシー
ルされている。また前記保護カバーキャップ１２と前記
防水保護カバー９との当接部にはＯＩＪング１３が嵌合
されておシ、保護カバーキャップ１２で締めつけること
により前記Ｏリング１３が圧縮されて水密にシールされ
るようになっている。また前記保護カバー９にはその直
径上を放射状に数本のサポートアングル１４が固設され
ており、この保護カバー９を補強すると同時に原子炉建
屋クレーン等で吊り上げたときの強度をもたせである。5 to 8, the waterproof protective cover 9 is formed into a double cylindrical shape, and is fixed on the upper surface of the flange 2 of the reactor pressure vessel body 7 so as to surround the stud bolts 5 and the body flange screw holes 6. ing. A gasket 10 is disposed at the contact portion between the waterproof protective cover 9 and the seven flange 2 integrated in this way, and this waterproof protective cover 9 is attached to a screw formed on the top of the stud bolt 5. hole 1
1 through frangible cover caps 12 at several places, and the packing 10 is compressed to form a watertight seal. Further, an OIJ ring 13 is fitted into the abutment portion between the protective cover cap 12 and the waterproof protective cover 9, and when the protective cover cap 12 is tightened, the O ring 13 is compressed and sealed watertightly. It has become so. In addition, several support angles 14 are fixed to the protective cover 9 in a radial manner on its diameter, to reinforce the protective cover 9 and at the same time give it strength when lifted by a reactor building crane or the like.
本発明の実施例による防水採掘カバーによれば、その取
付け、取外しが容易になり、作業時間の短縮がはかられ
る。最近の公知例によるスタッドボルト毎に防水キャッ
プを被冠する方法においても、従来の銅除去作業を行っ
ていた時の作業時間約１２時間に対し約８時間に短縮が
できるとしているが、本発明の実施例に示す方法によれ
ば更に約４時間の短縮ができる。また定検時間および放
射能低減が従来の１／３、最近の公知例の１／２に短縮
低減ができる。また本実施例では防水保護カバーは完全
に一体化された形状について説明したが、数分割しても
よいが作業時間の面で本実施例の方が有利であることは
云うまでもない。According to the waterproof mining cover according to the embodiment of the present invention, it is easy to install and remove it, and the working time can be shortened. Even with a recently known method of covering each stud bolt with a waterproof cap, the work time can be reduced to about 8 hours from about 12 hours when conventional copper removal work was carried out, but the present invention According to the method shown in the example, the time can be further shortened by about 4 hours. Further, the periodic inspection time and radioactivity reduction can be reduced to 1/3 of the conventional method and 1/2 of that of recent known examples. Furthermore, in this embodiment, the waterproof protective cover has been described as having a completely integrated shape, but it may be divided into several parts, but it goes without saying that this embodiment is more advantageous in terms of working time.
本発明は原子炉圧力容器のスタッドボルトの防水保護カ
バーにおいて、この圧力容器胴体フランジ部のスタッド
ボルトおよびねじ穴を一体化された防水保護カバーで被
覆するようにしたので、防水作業が極めて短時間になシ
、定検時間の短縮および放射能被曝の低減が可能となっ
た効果は極めて犬である。The present invention provides a waterproof protective cover for stud bolts of a reactor pressure vessel, in which the stud bolts and screw holes in the flange of the pressure vessel body are covered with an integrated waterproof protective cover, so that waterproofing work can be completed in an extremely short time. The effects of shortening routine inspection time and reducing radiation exposure are extremely significant.
第１図は原子炉燃料プール周辺の配置を示す平面図、第
２図は第１図の正面図、第３図は最近の公知例の防水キ
ャップの取付状態を示す縦断面図、第４図は最近の公知
例の防水プラグの取付状態を示す縦断面図、第５図は本
発明に係る防水保護カバーの実施例を示す取付平面図、
第６図は第５図のＡ−Ａ断面図、第７図は第５図のＢ−
ＢｌｌＩｆｒ面図、第８図は第５図のＣ−〇断面図であ
る。
１・・・原子炉圧力容器、２・・・胴体７ランジ部、５
・・・スタッドボルト、６・・・胴体７ランジねじ孔、
７・・・防水キャップ、８・・・防水プラグ、９・・・
防水保護カバー、１２・・・保護カバーキャップ、１４
・−・サポートアングル。
代理人 弁理士 高橋明夫Fig. 1 is a plan view showing the arrangement around the reactor fuel pool, Fig. 2 is a front view of Fig. 1, Fig. 3 is a longitudinal sectional view showing the installation state of a recently known waterproof cap, and Fig. 4 5 is a vertical sectional view showing the installation state of a recently known waterproof plug, and FIG. 5 is an installation plan view showing an embodiment of the waterproof protective cover according to the present invention.
Figure 6 is a sectional view taken along line A-A in Figure 5, and Figure 7 is a cross-sectional view taken along line B-- in Figure 5.
8 is a sectional view taken along line C--X in FIG. 5. 1... Reactor pressure vessel, 2... Fuselage 7 lange, 5
... Stud bolt, 6... Body 7 langage screw hole,
7...Waterproof cap, 8...Waterproof plug, 9...
Waterproof protective cover, 12... Protective cover cap, 14
・−・Support angle. Agent Patent Attorney Akio Takahashi
Claims (1)
において、前記複数個のスタッドボルトおよび前記圧力
容器胴体７ランジ部に形成された複数個のねじ穴を、そ
れぞれ同時に防水保護するために、前記スタッドボルト
に一体化されて固設されたことを特徴とする原子炉圧力
容器のスタッドボルトの防水保護カバー。1. In a waterproof protection cover for stud bolts of a reactor pressure vessel, in order to simultaneously waterproof protect the plurality of stud bolts and the plurality of screw holes formed in the flange portion of the pressure vessel body 7, the stud A waterproof protective cover for a stud bolt of a nuclear reactor pressure vessel, characterized in that it is integrated and fixed to the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57221883A JPS59112286A (en) | 1982-12-20 | 1982-12-20 | Waterproof protective cover for stud bolts of reactor pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57221883A JPS59112286A (en) | 1982-12-20 | 1982-12-20 | Waterproof protective cover for stud bolts of reactor pressure vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59112286A true JPS59112286A (en) | 1984-06-28 |
| JPS6334438B2 JPS6334438B2 (en) | 1988-07-11 |
Family
ID=16773669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57221883A Granted JPS59112286A (en) | 1982-12-20 | 1982-12-20 | Waterproof protective cover for stud bolts of reactor pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59112286A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6654436B2 (en) * | 2001-10-08 | 2003-11-25 | Westinghouse Electric Company Llc | Stud enclosure and method of use |
-
1982
- 1982-12-20 JP JP57221883A patent/JPS59112286A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6654436B2 (en) * | 2001-10-08 | 2003-11-25 | Westinghouse Electric Company Llc | Stud enclosure and method of use |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6334438B2 (en) | 1988-07-11 |
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