JPS61181996A - Regulator for water level in pool of pool for nuclear reactor - Google Patents
Regulator for water level in pool of pool for nuclear reactorInfo
- Publication number
- JPS61181996A JPS61181996A JP60020807A JP2080785A JPS61181996A JP S61181996 A JPS61181996 A JP S61181996A JP 60020807 A JP60020807 A JP 60020807A JP 2080785 A JP2080785 A JP 2080785A JP S61181996 A JPS61181996 A JP S61181996A
- Authority
- JP
- Japan
- Prior art keywords
- pool
- duct
- boule
- plate
- reactor
- 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.)
- Expired - Lifetime
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
- Structure Of Emergency Protection For Nuclear Reactors (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〕
本発明は沸騰水型原子炉建屋内に設けられている原子炉
つ゛エルブールと燃料貯蔵プールとの間に配置されたタ
ンクに連通ずるダクトの堰板の固定部分を改良した原子
炉用ブールのプール水位調整装置に関する。Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a dam of a duct that communicates with a tank located between a nuclear reactor tank and a fuel storage pool installed in a boiling water reactor building. This invention relates to a pool water level adjustment device for a nuclear reactor boule with an improved fixed part of the plate.
沸騰水型原子炉建屋内には原子炉圧力容器および原子炉
格納容器の上方に原子炉ウェルブールが、また原子炉ウ
ェルブールの近傍に原子炉内の使用済燃料集合体などを
一時貯蔵する燃料貯蔵プールが設けられている。原子炉
ウェルブールは原子炉内の定期点検の際にプール内に水
が満されて放射線を遮蔽している。Inside the boiling water reactor building, there is a reactor wellboul located above the reactor pressure vessel and reactor containment vessel, and near the reactor wellboul there is fuel for temporarily storing spent fuel assemblies inside the reactor. A storage pool is provided. The reactor wellbool is a pool filled with water to shield radiation during periodic inspections inside the reactor.
第４図は上記原子炉ウエルブニル１と燃料貯蔵プール２
との取合いを概略的に断面図で示したものである。すな
わち、第４図において、原子炉ウェルブール１と燃料針
°蔵ブール２との間に両プール１．２を区画するコンク
リート躯体３を介してスキマサージタンク４が設けられ
ている。原子炉運転中には原子炉ウェルブール１は図示
してないコンクリート蓋によって密閉される。各ブール
１゜２とタンク４とのコンクリート躯体３にはタンク４
側への下り勾配のダクト５が形成されており、各ブール
のプール水はこのダクト５を流れてタンク４に貯蔵され
る。第５図は第４図のＡ部の部分断面図であり、原子炉
ウェルブール１と、コンクリート躯体３とのダクト５の
開口部に設けられるブール水位調整装置を拡大して示し
たものである。Figure 4 shows the above reactor Wellvenil 1 and fuel storage pool 2.
This is a schematic cross-sectional view showing the relationship between the two. That is, in FIG. 4, a skimmer surge tank 4 is provided between a reactor well boule 1 and a fuel needle storage boule 2 via a concrete frame 3 that partitions both pools 1.2. During reactor operation, the reactor well boule 1 is sealed with a concrete lid (not shown). Tank 4 is installed in the concrete frame 3 of each boule 1゜2 and tank 4.
A duct 5 with a downward slope to the side is formed, through which the pool water of each boule flows and is stored in the tank 4. FIG. 5 is a partial cross-sectional view of part A in FIG. 4, showing an enlarged view of the reactor well boule 1 and the boule water level adjustment device installed at the opening of the duct 5 of the concrete frame 3. .
すなわち、第５図において、コンクリート躯体３のブー
ル１側の側面には内側に切り込んだ凹所６が設（）られ
、コンクリート躯体３の露出面にステンレス鋼製の第１
Ｊ５よび第２のライニング板７゜８が接続部材９を介
して張設されている。第１のライニング板７には前記凹
所６の開口面積とほぼ同様の大きさを有する孔１０が、
また第２のライニング板８にはダクト５の開口面積と同
様の孔１７がそれぞれ５Ωけられている。第１のライニ
ング板７の表面にはパッキング１２を介してカバー板１
３が固定ボルト１４によって着脱自在に取着されている
。固定ボルト１４はコンクリート躯体３に埋め込まれた
ねじ座１５にねじ込まれるようになっている。That is, in FIG. 5, a recess 6 cut inward is provided on the side surface of the concrete body 3 on the boule 1 side, and a stainless steel first groove 6 is provided on the exposed surface of the concrete body 3.
J5 and the second lining plate 7.8 are stretched via a connecting member 9. The first lining plate 7 has a hole 10 having approximately the same size as the opening area of the recess 6.
Further, the second lining plate 8 is provided with holes 17 of 5Ω each having the same opening area as the duct 5. A cover plate 1 is provided on the surface of the first lining plate 7 through a packing 12.
3 is detachably attached by a fixing bolt 14. The fixing bolt 14 is screwed into a screw seat 15 embedded in the concrete frame 3.
また、第２のライニング板８には水位調整用堰板１６が
ボルト１７およびナツト１８によって上下動自在に取着
されている。つまり、堰板１６には図示してないが両側
に細長いスリットが形成されており、またボルト１７の
先端部はうイニング板８を貫通してコンクリート躯体３
に埋め込まれて固定されている。そこで、露出したボル
ト１７の部分にスリットを挿入し、スリットの長手方向
に沿って堰板１６を上下動し所定の高さに位置決めして
からナツト１８をねじ込んで堰板１６を第２のライニン
グ板８に固定する。Further, a water level adjusting weir plate 16 is attached to the second lining plate 8 by bolts 17 and nuts 18 so as to be vertically movable. That is, the weir plate 16 has elongated slits formed on both sides (not shown), and the tip of the bolt 17 passes through the lining plate 8 to form the concrete frame 3.
embedded and fixed. Therefore, a slit is inserted into the exposed part of the bolt 17, the weir plate 16 is moved up and down along the length of the slit, positioned at a predetermined height, and then the nut 18 is screwed in to attach the weir plate 16 to the second lining. Fix it to the plate 8.
しかして、原子力発電プラントでは、原子炉内で燃焼さ
せた使用済燃料等を燃料貯蔵ブール２に貯蔵する作業が
定期的に行なわれる。Thus, in a nuclear power plant, the work of storing spent fuel and the like burned in the nuclear reactor in the fuel storage boule 2 is periodically performed.
この定検作業を行なうにあたり第４図に示すように通常
プラント運転時は、燃料ブール２のみ放射線遮蔽等の必
要性から常時循環する水（Ｗ）がＰ点まで注入され、使
用済燃料等が水中貯蔵されている。この循環水（Ｗ）は
ダクト５に設定された堰板１６により水位調整され、堰
板１６部からダクト５を通りタンク４内に流入する。ま
た原子炉ｒフェルブール１側のダクト５には燃料ブール
２側からの循環水（Ｗ）が原子炉ウェルブール１内に流
入することを防ぐためカバー板１３がダクト５の前面に
取付けられ、水位調整用の堰板１６もダクト５の前面の
凹所６内にＨＱＩ！されている。During this periodic inspection, as shown in Figure 4, during normal plant operation, constantly circulating water (W) is injected into the fuel boule 2 only up to point P due to the need for radiation shielding, etc., and the spent fuel, etc. Stored underwater. The water level of this circulating water (W) is adjusted by a weir plate 16 set in the duct 5, and flows from the weir plate 16 into the tank 4 through the duct 5. In addition, a cover plate 13 is attached to the front surface of the duct 5 on the reactor r well boule 1 side to prevent circulating water (W) from the fuel boule 2 side from flowing into the reactor well boule 1. The weir plate 16 for water level adjustment is also HQI in the recess 6 on the front of the duct 5! has been done.
定検作業は原子炉ウェルブール１に放射線被曝を防止す
る水張り作業から開始される。この水張作業の際には、
第５図に示すようにカバー板１３の取外しが行なわれ、
この取外しはカバー板１３に取付けられた固定用ボルト
１４をねじ座１５から取り外してカバー板１３を第１の
ライニング板７から取外し、保管する。Regular inspection work begins with filling the reactor wellboul 1 with water to prevent radiation exposure. During this water filling work,
As shown in FIG. 5, the cover plate 13 is removed,
For this removal, the fixing bolts 14 attached to the cover plate 13 are removed from the screw seats 15, and the cover plate 13 is removed from the first lining plate 7 and stored.
次に堰板１６の位置調整が行なわれる。その際堰板１６
は第２のライニング板８に固定されたボルト１７にナツ
ト１８で固定されているので、ナラ（−１８を緩めるこ
とにより堰板１６の設定位置の調整が行なわれ、その後
原子炉ウェルブール１に水張りが行なわれる作業手順で
ある。Next, the position of the weir plate 16 is adjusted. At that time, weir plate 16
is fixed with a nut 18 to a bolt 17 fixed to the second lining plate 8, the setting position of the weir plate 16 is adjusted by loosening the nut (-18), and then This is a work procedure in which water is filled.
従来のプール水位調整装置では定検作業時に必ずカバー
板１３を取外し、保管および再設定を行なう作業が必要
となり、これらの作業が作業環境の悪い場所で行なわれ
るため、堰板１６の調整等に困難なかつ放射線管理下で
の作業を要したり、また水位調整装置の構造も複雑であ
るなど問題点がある。With conventional pool water level adjustment devices, it is necessary to remove the cover plate 13, store it, and reset it during periodic inspection work, and since these operations are performed in a place with a poor working environment, it is difficult to adjust the weir plate 16, etc. There are some problems, such as the work being difficult and requiring radiation control, and the structure of the water level adjustment device being complicated.
本発明は上記問題点を解決するために成されたもので、
構造の簡素化を図るとともに水位調整用の堰板とシール
用カバー板とを一体構造化し、定検時の作業性を向上さ
せる一方、従来のシール用カバーの取外し、保管を不要
とした原子炉用ウェルブールのプール水位調整装置を提
供するものである。The present invention has been made to solve the above problems,
In addition to simplifying the structure, the weir plate for water level adjustment and the sealing cover plate are integrated into one, improving workability during periodic inspections, while eliminating the need to remove and store the conventional sealing cover. The purpose is to provide a pool water level adjustment device for water wells.
〔発明の概要〕
本発明は、沸騰水型原子炉建屋における原子炉ウェルブ
ールおよび燃料貯蔵ブールの間に設けられたタンクと、
このタンクおよび前記両プール間を区画するコンクリー
ト躯体と、このコンクリート躯体に設けられた前記タン
ク側への下り勾配のダクトと、このダクトの前記ブール
側のコンクリート躯体に張設されたライニング板と、こ
のライニング板に形成された前記ダクトに連通ずる開口
部と、この開口部の面積を調節するための上下動自在の
堰板と、この堰板を前記ライニング板にパッキングを介
して固定する固定部材とを具備したことを特徴とする原
子炉用ブールのブール水位調整装置である。[Summary of the Invention] The present invention provides a tank provided between a reactor well boule and a fuel storage boule in a boiling water reactor building;
a concrete frame that partitions the tank and both pools; a duct provided in the concrete frame with a downward slope toward the tank; and a lining plate stretched over the concrete frame on the boule side of the duct; An opening formed in this lining plate that communicates with the duct, a vertically movable weir plate for adjusting the area of this opening, and a fixing member that fixes this weir plate to the lining plate via packing. A boule water level adjustment device for a nuclear reactor boule, characterized by comprising:
本発明によれば構造が簡素化されて定検時の作業性が向
上し、完全なシール機能を有することによりブール内の
水張り、帰除などの作業が容易である。According to the present invention, the structure is simplified and workability during regular inspections is improved, and the complete sealing function facilitates operations such as filling and removing water in the boule.
以下、本発明に係る原子炉用ブールのプール水位調整装
置の一実藤例を第１図から第３図を参照しながら説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a pool water level adjustment device for a nuclear reactor boule according to the present invention will be described below with reference to FIGS. 1 to 3.
第１図は本発明の要部を示す縦断面図であって、第５図
と同一部分には同一符号で示しである。FIG. 1 is a longitudinal cross-sectional view showing essential parts of the present invention, and the same parts as in FIG. 5 are designated by the same reference numerals.
原子炉ウェルブール１側のコンクリート躯体３の内壁面
にはステンレス鋼製のライニング板１９が全面にわたっ
て平滑に張設されている。コンクリート躯体３には下り
勾配のダクト５が構成されており、ダクト５の下端は図
示してないスキマサージタンクに連通している。A stainless steel lining plate 19 is stretched smoothly over the entire surface of the inner wall surface of the concrete frame 3 on the reactor well boule 1 side. A downwardly sloping duct 5 is formed in the concrete frame 3, and the lower end of the duct 5 communicates with a gap surge tank (not shown).
ライニング板１９にはダクト５の開口と同様の位置にほ
ぼ同形状の開孔部２０が形成されている。The lining plate 19 has an opening 20 formed in the same position as the opening of the duct 5 and having substantially the same shape.
この開口部２０を覆うようにしてライニング板１９の前
面にパッキング１２を介して上下動自在の堰板２１が第
２図に示したように固定ボルト１４を介して取着されて
いる。固定ボルト１４はねじ座１５にねじ込まれて固定
される一方ナット２２によってダクトボルト２３にも固
定される。堰板２１には中央部の上面に矩形状切欠き部
２４と両側近傍に長孔２５が形成されている。長孔２５
はダクトボルト２３が挿入されナツト２２によって締め
付けられる。A vertically movable weir plate 21 is attached to the front surface of the lining plate 19 via a packing 12 so as to cover this opening 20 via fixing bolts 14, as shown in FIG. The fixing bolt 14 is screwed into the screw seat 15 and fixed, and is also fixed to the duct bolt 23 by a nut 22. The weir plate 21 has a rectangular notch 24 formed on the upper surface of the central portion and elongated holes 25 near both sides. Long hole 25
A duct bolt 23 is inserted and tightened with a nut 22.
しかして、原子炉の通常運転時には第２図に示したよう
に堰、板２１はダクト５の開口を覆う位置に固定ボルト
１４およびナツト２２で固定し位置設置されている。定
検作業時は第３図に示すよう堰板２１をダクト５の開口
に水位調整された位置に設定する。この設定作業は第３
図に示すよう固定ボルト１４をねじ座１５から全て外し
、ナツト２２を緩め、堰板２１を位置調整し、ナツト２
２で締付は固定する。このとき、固定ボルト１４は使用
されない。堰板２１を設定した後、原子炉ウェルブール
１に水張りする。使用済燃料等の燃料ブール２内への貯
蔵等が終了したら、原子炉ウェルブール１の水扱き、洗
浄を行ない、通常運転時の堰板２１の設定位置に逆の手
順で固定、設置すればよい。During normal operation of the nuclear reactor, the weir and plate 21 are fixed with fixing bolts 14 and nuts 22 at a position covering the opening of the duct 5, as shown in FIG. During regular inspection work, the weir plate 21 is set at the opening of the duct 5 at a position where the water level is adjusted as shown in FIG. This setting work is the third
As shown in the figure, remove all the fixing bolts 14 from the screw seats 15, loosen the nuts 22, adjust the position of the weir plate 21, and tighten the nuts 2.
Tighten firmly with step 2. At this time, the fixing bolt 14 is not used. After setting the weir plate 21, the reactor well boule 1 is filled with water. When the storage of spent fuel etc. in the fuel boule 2 is completed, treat the reactor well boule 1 with water, wash it, and fix and install it in the set position of the weir plate 21 during normal operation by reversing the procedure. good.
なお、上記堰板２１を燃料ブール１側のダクト５にも適
用することができる。すなわち、原子力発電プラント工
事の完了時には燃料ブール１に水張り試験が必ず行なわ
れるが、通常運転時の定常水位で保持し試験を受けなけ
ればならない。この際燃料ブール１側のダクト開口に上
記実施例で説明した堰板２１を使用することにより、燃
料ブール１側からダクト内への水の流入を防止すること
ができる。Note that the above-mentioned weir plate 21 can also be applied to the duct 5 on the fuel boule 1 side. That is, when nuclear power plant construction is completed, the fuel boule 1 is always subjected to a water filling test, but the test must be performed while maintaining the water level at a steady level during normal operation. At this time, by using the weir plate 21 described in the above embodiment at the duct opening on the fuel boule 1 side, it is possible to prevent water from flowing into the duct from the fuel boule 1 side.
また前述した実施例では、ダクト内への水の流入を防止
できることによりダクトと接続しているタンク内のスク
リーン等の掃除ができる。Further, in the above-described embodiment, since water can be prevented from flowing into the duct, the screen and the like in the tank connected to the duct can be cleaned.
以上述べたように本発明によれば原子炉ウェルブール側
の構造が簡素化できる一方、カバー板の取外し、保管、
再設定という作業が不要となり、堰板の取付は位置を変
えるだけで通常運転時の原子炉ウェルブール側への燃料
プール水の流入を完全にシールでき、定検時の水位調整
も兼用でき作業効率も向上する効果がある。As described above, according to the present invention, the structure of the reactor well boule side can be simplified, while the cover plate can be removed, stored,
There is no need to reset the weir plate, and simply by changing the position of the weir plate, it is possible to completely seal the inflow of fuel pool water into the reactor well boule side during normal operation, and it can also be used to adjust the water level during periodic inspections. It also has the effect of improving efficiency.
第１図は本発明に係る原子炉用ブールのプール水位調整
装置の一実施例を示す縦断面図、第２図は第１図におけ
る堰板をライニング板に取着した状態を示す正面図、第
３図は第２図の定検作業時の状態を示す正面図、第４図
１よ従来の原子炉用プールのプール水位調整装置を説明
するための概略的断面図、第５図は第４図のＡ部を拡大
して示す縦断面図である。
１・・・原子炉ウェルプール、２・・・燃料貯蔵プール
、３・・・コンクリート躯体、４・・・スキマサージタ
ンク、５・・・ダクト、６・・・凹所、７，８・・・ラ
イニング板、９・・・接続部材、ｉｏ、１ｉ・・・孔、
１２・・・パッキング、１３・・・カバー板、１４・・
・固定ボルト、１５・・・ねじ座、１６・・・水位調整
用堰板、１７・・・ボルト、１８・・・ナツト、１９・
・・ライニング板、２０・・・間口部、２１・・・堰板
、２２・・・ナツト、２３・・・ダクトボルト、２４・
・・切欠き部、２５・・・長孔。
出願人代理人 波 多 野 久第 １ 回
茶 ２ 園
第 ３Ｆ２Ｉ
、５FIG. 1 is a longitudinal sectional view showing an embodiment of the pool water level adjustment device for a nuclear reactor boule according to the present invention, and FIG. 2 is a front view showing a state in which the weir plate in FIG. 1 is attached to a lining plate. Fig. 3 is a front view showing the state during regular inspection work in Fig. 2, Fig. 4 is a schematic sectional view to explain the conventional pool water level adjustment device for a nuclear reactor pool, Fig. 5 is a FIG. 4 is an enlarged vertical cross-sectional view showing part A in FIG. 4; 1... Reactor well pool, 2... Fuel storage pool, 3... Concrete frame, 4... Skimmer surge tank, 5... Duct, 6... Recess, 7, 8...・Lining plate, 9... Connection member, io, 1i... Hole,
12...Packing, 13...Cover plate, 14...
・Fixing bolt, 15... Screw seat, 16... Weir plate for water level adjustment, 17... Bolt, 18... Nut, 19.
... Lining plate, 20 ... Frontage section, 21 ... Weir plate, 22 ... Nut, 23 ... Duct bolt, 24 ...
...Notch, 25...long hole. Applicant's agent Hisashi Hatano 1st tea 2 Sono No. 3F2I, 5
Claims (1)
れたタンクと、このタンクおよび前記両プール間を区画
するコンクリート躯体と、このコンクリート躯体に設け
られた前記タンク側への下り勾配のダクトと、このダク
トの前記プール側のコンクリート躯体に張設されたライ
ニング板と、このライニング板に形成された前記ダクト
に連通する開口部と、この開口部の面積を調節するため
の上下動自在の堰板と、この堰板を前記ライニング板に
パッキングを介して固定する固定部材とを具備したこと
を特徴とする原子炉用プールのプール水位調整装置。A tank provided between a reactor well pool and a fuel storage pool, a concrete frame that partitions this tank and both pools, a duct provided in this concrete frame that slopes downward toward the tank, and A lining plate stretched over the concrete frame on the pool side of the duct, an opening formed in the lining plate that communicates with the duct, and a weir plate that is movable up and down to adjust the area of this opening. A pool water level adjustment device for a nuclear reactor pool, comprising: a fixing member for fixing the weir plate to the lining plate via packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60020807A JPS61181996A (en) | 1985-02-07 | 1985-02-07 | Regulator for water level in pool of pool for nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60020807A JPS61181996A (en) | 1985-02-07 | 1985-02-07 | Regulator for water level in pool of pool for nuclear reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61181996A true JPS61181996A (en) | 1986-08-14 |
Family
ID=12037307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60020807A Expired - Lifetime JPS61181996A (en) | 1985-02-07 | 1985-02-07 | Regulator for water level in pool of pool for nuclear reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61181996A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6279030A (en) * | 1986-09-19 | 1987-04-11 | 加藤電機株式会社 | Apparatus for automatically opening and closing toilet lid or seat of western style toilet bowl |
| US5108097A (en) * | 1990-09-05 | 1992-04-28 | Hideyuki Ashihara | Multi-functional police baton |
| US5108098A (en) * | 1990-07-30 | 1992-04-28 | Hideyuki Ashihara | Police baton with crosshandle having rotatably mounted device |
| US5188362A (en) * | 1990-06-20 | 1993-02-23 | Hideyuki Ashihara | Police baton with crosshandle and handguard |
| CN112037942A (en) * | 2020-09-08 | 2020-12-04 | 中国原子能科学研究院 | Cover plate device and pool type reactor with same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5399195A (en) * | 1977-02-08 | 1978-08-30 | Toshiba Corp | Water level adjuster for nuclear fuel storing tank |
-
1985
- 1985-02-07 JP JP60020807A patent/JPS61181996A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5399195A (en) * | 1977-02-08 | 1978-08-30 | Toshiba Corp | Water level adjuster for nuclear fuel storing tank |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6279030A (en) * | 1986-09-19 | 1987-04-11 | 加藤電機株式会社 | Apparatus for automatically opening and closing toilet lid or seat of western style toilet bowl |
| JPH0534969B2 (en) * | 1986-09-19 | 1993-05-25 | Kato Denki Kk | |
| US5188362A (en) * | 1990-06-20 | 1993-02-23 | Hideyuki Ashihara | Police baton with crosshandle and handguard |
| US5108098A (en) * | 1990-07-30 | 1992-04-28 | Hideyuki Ashihara | Police baton with crosshandle having rotatably mounted device |
| US5108097A (en) * | 1990-09-05 | 1992-04-28 | Hideyuki Ashihara | Multi-functional police baton |
| CN112037942A (en) * | 2020-09-08 | 2020-12-04 | 中国原子能科学研究院 | Cover plate device and pool type reactor with same |
| CN112037942B (en) * | 2020-09-08 | 2023-05-23 | 中国原子能科学研究院 | Cover plate device and pool type reactor with same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5629964A (en) | Neutron absorbing apparatus | |
| US5479463A (en) | Neutron absorbing apparatus | |
| JPS61181996A (en) | Regulator for water level in pool of pool for nuclear reactor | |
| JPH083540B2 (en) | Reactor fuel assembly | |
| JPS6230994A (en) | Breakwater facility for pool water in nuclear reactor pool | |
| JPH07128485A (en) | Fuel pool equipment | |
| DE2514312B2 (en) | RADIATION SHIELDING OF A NUCLEAR REACTOR IN THE AREA OF THE REACTOR PRESSURE VESSEL FLANGE | |
| JPS6046489A (en) | Pressure vessel for nuclear reactor | |
| JPS62291600A (en) | Wet type overhauling method of nuclear reactor facility | |
| JPH04322707A (en) | Ceramic filter device | |
| JPS5824891A (en) | Method of fixing reactor container torus at field | |
| JPS59112286A (en) | Water-proof protection cover of stud bolt of reactor pressure vessel | |
| JPS60165584A (en) | Guide tube for control rod of reactor | |
| JPS59171890A (en) | Radiation shielding device of reactor well | |
| JPH06105311B2 (en) | Reactor refueling shihagei device | |
| JPS5829913A (en) | Bank having detachable curtain wall unit | |
| JP2866441B2 (en) | Reactor water sampling device | |
| JPH11295482A (en) | Expansion and contraction type simple radiation shield vessel | |
| JPS5487377A (en) | Fitting method of lower flange surface of reflector vessel | |
| JPS63179291A (en) | Shielding plug | |
| JPH0372959B2 (en) | ||
| JPS61117484A (en) | In-pile structure | |
| JPS58179393A (en) | Reactor building | |
| JPH0358076B2 (en) | ||
| JPS58178291A (en) | Seal device of reactor well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |