JPH09113676A - Equipment temporary pool - Google Patents
Equipment temporary poolInfo
- Publication number
- JPH09113676A JPH09113676A JP7266542A JP26654295A JPH09113676A JP H09113676 A JPH09113676 A JP H09113676A JP 7266542 A JP7266542 A JP 7266542A JP 26654295 A JP26654295 A JP 26654295A JP H09113676 A JPH09113676 A JP H09113676A
- Authority
- JP
- Japan
- Prior art keywords
- pool
- closing lid
- water
- pit
- fuel
- 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
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、原子炉建屋内の機
器仮置プールに係り、特にそのプールの底部に設置さ
れ、原子炉用燃料を取り扱う燃料交換機により模擬燃料
の掴みおよび放し確認試験を行うために使用される燃料
掴み具調整ピットに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary equipment pool in a reactor building, and in particular, a simulated fuel grip and release confirmation test is carried out by a fuel exchanger installed at the bottom of the pool and handling reactor fuel. It relates to a fuel grip adjustment pit used to do so.
【０００２】[0002]
【従来の技術】以下に、沸騰水型原子炉に併設されたプ
ール一般設備の燃料掴み具調整ピットを有する機器仮置
プールを図２及び図３で説明する。図２及び図３に示す
ように原子力発電所内の原子炉建屋内原子炉格納容器に
付属して、その上部のオペレーションフロア10に機器仮
置プール１及びゲート11を介して連通する原子炉ウェル
12、使用済燃料貯蔵プール（図示せず）が形成されてい
る。2. Description of the Related Art A temporary equipment pool having a fuel gripping tool adjusting pit for pool general equipment installed in a boiling water reactor will be described below with reference to FIGS. As shown in FIGS. 2 and 3, a reactor well that is attached to the reactor containment vessel inside the nuclear power plant and communicates with the operation floor 10 above it via the temporary equipment pool 1 and the gate 11.
12. A spent fuel storage pool (not shown) is formed.
【０００３】図２に示すように機器仮置プール１の底部
には、原子炉用の燃料を取り扱うために、燃料交換機
（図示せず）により事前に模擬燃料の掴みおよび放しの
確認を行うための燃料掴み具調整ピット２が連結して形
成されている。機器仮置プール１には定期検査時に蒸気
乾燥器（図示せず）及び気水分離器・シュラウドヘッド
（図示せず）等の炉内構造物を仮置し、仮置した機器か
らの放射線を遮蔽するためにプール水３ａが貯留され
る。そして、このプール水３ａは機器仮置プール１の使
用後燃料掴み具調整ピット２の底部に接続されたドレン
４13から系外へ放水される。As shown in FIG. 2, at the bottom of the temporary equipment pool 1, in order to handle the fuel for the nuclear reactor, a fuel exchanger (not shown) is used to confirm in advance the grasp and release of the simulated fuel. The fuel gripping tool adjusting pit 2 is formed by being connected. During the periodic inspection, the equipment temporary storage pool 1 is temporarily installed with furnace internal structures such as a steam dryer (not shown) and a steam separator / shroud head (not shown), and radiation from the temporarily installed equipment is stored. Pool water 3a is stored for shielding. Then, the pool water 3a is discharged to the outside of the system from the drain 413 connected to the bottom of the fuel gripping tool adjustment pit 2 after the use of the temporary equipment pool 1.
【０００４】燃料掴み具調整ピット２が使用されていな
い場合にはそのピット２の開口部に図３に示すように機
器仮置プール１の底部と燃料掴み具調整ピット２の開口
部の取合い部を覆うように閉止蓋４が設置されている。
この閉止蓋４は燃料掴み具調整ピット２内への機器落下
防止を主目的としていたためシール機能は持たず、甚し
い場合は鋼材を網状に形成したグレーチングを使用して
いた。この為、機器仮置プール１にプール水３ａが張ら
れる場合にはその底部に併設されている燃料掴み具調整
ピット２内にもプール水３ｂが張られる構成となってい
た。When the fuel grip adjustment pit 2 is not used, the bottom of the temporary equipment pool 1 and the opening of the fuel grip adjustment pit 2 are connected to the opening of the pit 2 as shown in FIG. A closing lid 4 is installed so as to cover the.
Since the closing lid 4 has a main purpose of preventing the device from falling into the fuel gripping tool adjusting pit 2, it does not have a sealing function, and in the worst case, a grating made of a steel material is used in a mesh form. For this reason, when pool water 3a is stretched in the temporary equipment pool 1, pool water 3b is also stretched in the fuel grip adjustment pit 2 provided at the bottom of the pool.
【０００５】[0005]
【発明が解決しようとする課題】上記構成において、定
期検査前に行われる燃料交換機による模擬燃料の掴みお
よび放しの確認は燃料掴み具調整ピット内が気中の状態
で行っている。しかしながら、機器仮置プールは定期検
査時に蒸気乾燥機及び気水分離器・シュラウドヘッドを
仮置し、仮置した機器からの放射線を遮蔽するために水
が張られるため、機器仮置プールに併設されている燃料
掴み具調整ピット内にも水が張られることになる。機器
仮置プールは定期検査終了後に水抜きを行い、プール表
面の除染作業を行うが、燃料掴み具調整ピットは円筒形
状をしており直径が約１ｍで、深さも約10ｍもあり、水
を抜くことは出来るが内部の除染作業は困難であり、機
器仮置プール内での作業時に、作業員が被ばくするおそ
れがあった。そこで本発明の目的は、上述した点に鑑
み、機器仮置プール水張り時に燃料掴み具調整ピット内
から水が入らない機器仮置プールを提供することにあ
る。In the above structure, the confirmation of whether the simulated fuel is grabbed or released by the fuel exchanger before the regular inspection is performed while the inside of the fuel gripping tool adjustment pit is in the air. However, the equipment temporary storage pool is provided with a steam dryer, steam separator, and shroud head at the time of regular inspection, and water is filled to shield the radiation from the temporarily installed equipment. Water will also be filled inside the fuel grip adjustment pit that is being operated. After the periodic inspection, the equipment temporary storage pool will be drained and the pool surface will be decontaminated. The fuel grip adjustment pit has a cylindrical shape with a diameter of about 1 m and a depth of about 10 m. However, the decontamination work inside was difficult, and there was a risk that workers would be exposed during work in the temporary equipment pool. Then, in view of the above-mentioned point, an object of the present invention is to provide a temporary equipment pool in which water does not enter from the fuel gripping tool adjustment pit when the temporary equipment pool is filled with water.
【０００６】[0006]
【課題を解決するための手段】請求項１記載の本発明に
おいては、原子炉建屋のオペレーションフロアに形成さ
れ、底部に燃料掴み具調整ピットを形成した機器仮置プ
ールにおいて、燃料掴み具調整ピットの開口部に閉止蓋
を配設し、この閉止蓋はシール機構を有して成る機器仮
置ピットを提供し、請求項２記載の本発明においては、
請求項１記載の本発明のシール機構を、閉止蓋の底面で
かつ閉止蓋と機器仮置プールの取り合部全周に配設され
た第１のパッキンから構成して成ることを特徴とする機
器仮置プールを提供し、請求項３記載の本発明において
は、請求項１または２記載の本発明のシール機構を、閉
止蓋の底面外周に装着され、先端部ほど薄く形成した第
２のパッキンから構成して成ることを特徴とする機器仮
置プールを提供し、請求項４記載の本発明においては、
請求項１から３のいずれか１項記載の本発明のシール機
構を閉止蓋の代りに機器仮置プールの底面に配設して成
ることを特徴とする機器仮置プールを提供する。According to the present invention as set forth in claim 1, a fuel gripping adjustment pit is provided in a temporary equipment pool formed on the operation floor of a reactor building and having a fuel gripping adjustment pit formed at the bottom thereof. A closing lid is provided in the opening of the device, and the closing lid provides a temporary equipment pit having a sealing mechanism. In the present invention according to claim 2,
The sealing mechanism of the present invention according to claim 1 is constituted by a first packing provided on the bottom surface of the closing lid and around the entire circumference of the joining portion of the closing lid and the temporary equipment pool. A temporary equipment pool is provided, and in the present invention according to claim 3, the seal mechanism according to the present invention according to claim 1 or 2 is attached to the outer periphery of the bottom surface of the closing lid, and the second end is formed to be thinner toward the tip end portion. An apparatus temporary storage pool provided by packing is provided, and in the present invention according to claim 4,
A temporary equipment pool is provided in which the sealing mechanism of the present invention according to any one of claims 1 to 3 is arranged on the bottom surface of the temporary equipment pool instead of the closing lid.
【０００７】よって、請求項１から４記載の本発明にお
いては、機器仮置プール底部の燃料掴み具調整ピットと
の取合い部に、シール機能を有する構造の閉止蓋を設置
したので、機器仮置プールにプール水を貯留した場合に
おいても、燃料掴み具調整ピット内に水が入らず除染作
業を省略することができる。Therefore, according to the present invention as set forth in claims 1 to 4, since the closing lid having a structure having a sealing function is installed at the engaging portion of the bottom of the temporary equipment pool with the fuel gripping tool adjusting pit, the temporary equipment is temporarily placed. Even when pool water is stored in the pool, the decontamination work can be omitted because no water enters the fuel gripping tool adjustment pit.
【０００８】[0008]
【発明の実施の形態】以下に本発明の実施の形態を図１
を参照して説明する。なお、図１において、図２，図３
と同一部分には同一符号を付し、その部分の構成の説明
は省略する。図１において、機器仮置プール１の底部と
燃料掴み具調整ピット２の上部取合い部を覆うように閉
止蓋７が設置されている。この閉止蓋７には、機器仮置
プール１の底部との接触部である閉止蓋７の下面全周に
シール機能を主に受け持つ第１のパッキン５が配設され
ている。さらに閉止蓋７の外周に第１のパッキン５と閉
止蓋７および機器仮置プール１で構成される間隙へのプ
ール水３ａの侵入を防止し、閉止蓋７の取外し時に燃料
掴み具調整ピット２内へのプール水３ａの落下を防ぐ目
的で第２のパッキン６が装着されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. 2 and 3 in FIG.
The same reference numerals are given to the same parts as those described above, and the description of the configuration of that part is omitted. In FIG. 1, a closing lid 7 is installed so as to cover the bottom of the temporary equipment pool 1 and the upper connecting portion of the fuel gripping tool adjusting pit 2. The closing lid 7 is provided with a first packing 5 mainly responsible for a sealing function on the entire lower surface of the closing lid 7 which is a contact portion with the bottom of the temporary equipment pool 1. Further, the pool water 3a is prevented from entering the gap formed by the first packing 5, the closing lid 7 and the temporary equipment pool 1 on the outer periphery of the closing lid 7, and when the closing lid 7 is removed, the fuel grip adjustment pit 2 A second packing 6 is attached for the purpose of preventing the pool water 3a from falling inside.
【０００９】なお、実施例の形態においては、第１，第
２のパッキン５，６の双方を使用した例で示したが、シ
ール性を鑑みて一方のパッキンでもその目的を達成する
ことは可能であり、かつ取合い部の機器仮置プール１の
底面にパッキン５，６を配設してもよい。In the embodiment, the example in which both the first and second packings 5 and 6 are used is shown, but it is possible to achieve the object with one packing in view of the sealing property. In addition, the packings 5 and 6 may be provided on the bottom surface of the temporary equipment pool 1 at the connecting portion.
【００１０】以上の構成において、機器仮置プール１の
底部との接触部である閉止蓋７の下面に第１のパッキン
５、閉止蓋７の外周に第２のパッキン６が装着され、各
々のパッキン５，６は、閉止蓋７の自重により機器仮置
プール１の底部ラインナー上に押しつけられ、燃料掴み
具調整ピット２内に機器仮置プール１の水張り時のプー
ル水３ａが流入するのを防止する。In the above structure, the first packing 5 is attached to the lower surface of the closing lid 7 which is a contact portion with the bottom of the temporary equipment pool 1, and the second packing 6 is attached to the outer circumference of the closing lid 7. The packings 5 and 6 are pressed against the bottom liner of the temporary equipment pool 1 by the dead weight of the closing lid 7, and the pool water 3a when the temporary equipment pool 1 is filled with water flows into the fuel grip adjustment pit 2. Prevent.
【００１１】また、機器仮置プール１にプール水３ａが
張られることにより、その水頭圧で更に閉止蓋７が機器
仮置プール１の底部ラインナー上に押しつけられシール
機能が向上する。Further, when the pool water 3a is stretched over the temporary equipment pool 1, the closing head 7 is further pressed against the bottom liner of the temporary equipment pool 1 by the water head pressure, and the sealing function is improved.
【００１２】尚、閉止蓋７の外周に装着される第２のパ
ッキン６は、機器仮置プール１の底部ラインナー上への
接触を良くするため、閉止蓋７から突出しかつ先端部ほ
ど薄く形成されている。The second packing 6 mounted on the outer periphery of the closing lid 7 projects from the closing lid 7 and is formed thinner toward the tip end thereof in order to improve the contact with the bottom liner of the temporary equipment pool 1. Has been done.
【００１３】よって、機器仮置プール底部の燃料掴み具
調整ピットの上部との取合い部に、シール機能を有する
閉止蓋を設置することにより、機器仮置プールに水が張
られた場合にも燃料掴み具調整ピット内に水が入らなく
なり、燃料掴み具調整ピット内の除染作業を省略するこ
とができる。Therefore, by installing a closing lid having a sealing function at the joint of the bottom of the temporary equipment pool with the upper part of the fuel grip adjustment pit, even if water is filled in the temporary equipment pool Since water does not enter the gripping tool adjusting pit, the decontamination work in the fuel gripping tool adjusting pit can be omitted.
【００１４】[0014]
【発明の効果】燃料掴み具調整ピット内に水が入らなく
なることにより、燃料掴み具調整ピット内の除染作業を
省略することができるAs the water does not enter the fuel grip adjusting pit, the decontamination work in the fuel grip adjusting pit can be omitted.
【図１】本発明の要部を示す機器仮置プールの要部縦断
面図。FIG. 1 is a vertical cross-sectional view of a main part of a temporary equipment pool showing a main part of the present invention.
【図２】機器仮置プールの従来例を示す縦断面図。FIG. 2 is a vertical cross-sectional view showing a conventional example of a temporary equipment pool.
【図３】図２に示した機器仮置プールの底部と燃料掴み
具調整ピットの取り合い部を示す要部縦断面図。FIG. 3 is a longitudinal cross-sectional view of essential parts showing a bottom portion of the temporary equipment pool shown in FIG. 2 and a mating portion of a fuel grip adjustment pit.
１…機器仮置プール、２…燃料掴み具調整ピット ４，７…閉止蓋、５…第１のパッキン ６…第２のパッキン、10…オペレーションフロア 13…ドレン管 1 ... Equipment temporary storage pool, 2 ... Fuel gripping tool adjustment pit 4, 7 ... Closing lid, 5 ... 1st packing, 6 ... 2nd packing, 10 ... Operation floor, 13 ... Drain pipe
Claims (4)
成され、底部に燃料掴み具調整ピットを形成した機器仮
置プールにおいて、前記燃料掴み具調整ピットの開口部
に閉止蓋を配設し、この閉止蓋はシール機構を有して成
ることを特徴とする機器仮置プール。1. In a temporary equipment pool formed on the operation floor of a reactor building and having a fuel grip adjusting pit formed at the bottom, a closing lid is provided at the opening of the fuel grip adjusting pit, and this closing is performed. The equipment temporary storage pool, in which the lid has a sealing mechanism.
かつ閉止蓋と機器仮置プールの取り合部全周に配設され
た第１のパッキンから成ることを特徴とする請求項１記
載の機器仮置プール。2. The sealing mechanism comprises a first packing provided on the bottom surface of the closing lid and around the entire circumference of the joining portion of the closing lid and the temporary equipment pool. Equipment temporary storage pool.
周に装着され、先端部ほど薄く形成した第２のパッキン
から成ることを特徴とする請求項１または２記載の機器
仮置プール。3. The temporary equipment pool according to claim 1 or 2, wherein the sealing mechanism includes a second packing that is attached to an outer periphery of a bottom surface of the closing lid and is formed so as to be thinner toward a tip end portion thereof.
器仮置プールの底面に配設されて成ることを特徴とする
請求項１から３のいずれか１項記載の機器仮置プール。4. The temporary equipment pool according to claim 1, wherein the sealing mechanism is provided on the bottom surface of the temporary equipment pool instead of the closing lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7266542A JPH09113676A (en) | 1995-10-16 | 1995-10-16 | Equipment temporary pool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7266542A JPH09113676A (en) | 1995-10-16 | 1995-10-16 | Equipment temporary pool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09113676A true JPH09113676A (en) | 1997-05-02 |
Family
ID=17432312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7266542A Pending JPH09113676A (en) | 1995-10-16 | 1995-10-16 | Equipment temporary pool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09113676A (en) |
-
1995
- 1995-10-16 JP JP7266542A patent/JPH09113676A/en active Pending
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