JPH0112239Y2 - - Google Patents
Info
- Publication number
- JPH0112239Y2 JPH0112239Y2 JP1980006999U JP699980U JPH0112239Y2 JP H0112239 Y2 JPH0112239 Y2 JP H0112239Y2 JP 1980006999 U JP1980006999 U JP 1980006999U JP 699980 U JP699980 U JP 699980U JP H0112239 Y2 JPH0112239 Y2 JP H0112239Y2
- Authority
- JP
- Japan
- Prior art keywords
- scraper
- hole
- cask
- door valve
- sodium
- 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
Links
- 239000011734 sodium Substances 0.000 claims description 16
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 15
- 229910052708 sodium Inorganic materials 0.000 claims description 15
- 239000002893 slag Substances 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000005855 radiation 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
-
- 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
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【考案の詳細な説明】
本考案は高速炉におけるメンテナンス機器にお
いて、特に前記高速炉の遮蔽プラグ貫通孔内面に
付着した凝固ナトリウムを加熱軟化させて機械的
に除去し得るナトリウム除去装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to maintenance equipment for fast reactors, and particularly to a sodium removal device capable of mechanically removing solidified sodium adhering to the inner surface of the shielding plug through hole of the fast reactor by heating and softening it.
高速炉の遮蔽プラグ上に設けられる炉心上部機
構上塔載機器例えば制御棒駆動機構の各構成部品
は、炉心から放出される放射線によつて脆化した
り、冷却材としてのNaにより腐蝕するので、定
期的に交換する必要がある。この制御棒駆動機構
は、制御棒駆動機構取扱機で交換を行なつてい
る。然しながら、制御棒駆動機構を炉心上部機構
から取外した後、新らしい制御棒駆動機構を炉心
上部機構に装着するとき、取外し時に炉内から引
上げた制御棒駆動機構から滴下するナトリウムや
運転中に付着する炉容器内から発生するナトリウ
ム蒸気が凝固した霧状氷結物質（スラグ）によつ
て、その挿入を妨げられることがある。そこで、
前記付着ナトリウムやスラグを機械的に切削除去
するメンテナンス機器がたとえば実公昭52−
12079号公報に開示されている。しかしながら、
この装置では長い貫通孔を清掃する場合には軸の
ねじり剛性などによる軸芯の振れなど解決すべき
課題を有すると共に貫通孔にガイドキーなどの突
起物があると使用できない。 Each component of the upper core mechanism installed on the shielding plug of a fast reactor, such as the control rod drive mechanism, becomes brittle due to the radiation emitted from the reactor core and corroded by Na as a coolant. It needs to be replaced periodically. This control rod drive mechanism is replaced using a control rod drive mechanism handling machine. However, after the control rod drive mechanism has been removed from the upper core mechanism, when a new control rod drive mechanism is installed in the upper core mechanism, sodium that drips from the control rod drive mechanism that was pulled up from inside the reactor at the time of removal and that adheres during operation. Insertion may be obstructed by frozen mist (slag), which is solidified sodium vapor generated from inside the reactor vessel. Therefore,
For example, maintenance equipment for mechanically cutting off the adhering sodium and slag was developed in 1973.
It is disclosed in Publication No. 12079. however,
When cleaning a long through hole, this device has problems that must be solved, such as vibration of the shaft center due to the torsional rigidity of the shaft, and it cannot be used if there is a protrusion such as a guide key in the through hole.
本考案は上述の事情に鑑みてなされたもので、
炉心上部機構塔載機器の取外された後の貫通孔へ
ヒータを内蔵したスクレーパを貫通させることに
より、前記炉心上部機構の貫通孔を清掃する高速
炉におけるナトリウム除去装置を得ることを目的
とする。 This idea was made in view of the above-mentioned circumstances.
The object of the present invention is to obtain a sodium removal device in a fast reactor that cleans the through hole of the upper core mechanism by passing a scraper with a built-in heater through the through hole after the upper core mechanism tower-mounted equipment has been removed. .
以下図面を参照して本考案の一実施例を説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
第１図に示す如く本考案に係るナトリウム除去
装置１０は遮蔽構造物１１の開口部１１ａを閉蓋
する如く載置された炉上部ピツト蓋１２に取付け
られる。即ち、前記炉上部ピツト蓋１２上に取付
けられたドアバルブ１３，１４と、このドアバル
ブ１３の下面に取付けられた下部連結管１５と、
前記ドアバルブ１４の上面に取付けられたキヤス
ク１６と前記キヤスク内に収納されるスクレーパ
１７と、前記キヤスクの上面に取付けられた駆動
部１８より構成されている。なお図中１は原子炉
容器で、容器１の内部に炉心２が装荷され、液体
ナトリウム３は下部から上部へ流れ図示しない配
管から流出するようになつている。前記ドアバル
ブ１３に設けられた下部連結管１５の下端は、遮
蔽プラグ１９上の炉心上部機構２０の上面に当接
している。前記ドアバルブ１４の上面に設けられ
たキヤスク１６は中空の筒状で、上面に駆動部１
８を有し内部にスクレーパ１７を収納している。
前記スクレーパ１７は前記駆動部１８とワイヤロ
ープ１８ａ及びケーブル１８ｂを介して接続し、
前記キヤスク１６内及び炉心上部機構２０の貫通
孔２０ａ内を上下動する。このスクレーパ１７
は、第２図に示す如くおもり１７ａとおもり１７
ａの側面に複数の刃先１７ｂと刃先１７ｂの上方
に設置された複数のフイン１７ｃと、前記おもり
１７ａの先端に取付けたヒータ１７ｄとから構成
される。 As shown in FIG. 1, a sodium removal device 10 according to the present invention is attached to a furnace upper pit lid 12 placed so as to close an opening 11a of a shielding structure 11. That is, door valves 13 and 14 installed on the furnace upper pit lid 12, and a lower connecting pipe 15 installed on the lower surface of the door valve 13,
It is composed of a cask 16 attached to the upper surface of the door valve 14, a scraper 17 housed within the cask, and a drive section 18 attached to the upper surface of the cask. In the figure, reference numeral 1 denotes a reactor vessel. A reactor core 2 is loaded inside the vessel 1, and liquid sodium 3 flows from the bottom to the top and flows out from a pipe (not shown). The lower end of the lower connecting pipe 15 provided in the door valve 13 is in contact with the upper surface of the core upper mechanism 20 on the shielding plug 19 . The cask 16 provided on the upper surface of the door valve 14 has a hollow cylindrical shape, and has a drive section 1 on the upper surface.
8 and houses a scraper 17 inside.
The scraper 17 is connected to the drive unit 18 via a wire rope 18a and a cable 18b,
It moves up and down within the cask 16 and the through hole 20a of the core upper mechanism 20. This scraper 17
As shown in Fig. 2, the weight 17a and the weight 17 are
It is composed of a plurality of cutting edges 17b on the side surface of a, a plurality of fins 17c installed above the cutting edges 17b, and a heater 17d attached to the tip of the weight 17a.
次に上記装置の動作を説明する。制御棒駆動機
構の如く炉心上部塔載機器を交換するために取去
つた後の炉心上部機構２０の貫通孔２０ａにナト
リウム除去装置１０のスクレーパ１７を挿入す
る。この時、ナトリウム除去装置１０は、炉上部
ピツト蓋１２に載置される。即ち、ナトリウム除
去装置１０は、ドアバルブ１３を介して前記炉上
部ピツト蓋１２に載置固定された後、駆動部１８
を操作してワイヤーロープ１８ａ及びケーブル１
８ｂを降下して、その下端に設けられたスクレー
パ１７を炉心上部機構２０の貫通孔２０ａに挿入
する。このとき、貫通孔を閉塞しているスラグ類
は、前記スクレーパ１７のヒータ１７ａで加熱さ
れ軟化する。刃先１７ｂは下から上に向けて径の
大きなものを配置している。従つてスラグ類を容
易に刃先１７ｂで削り落すことができる。刃先１
７ｂで削り落せないで残つたスラグ類はフイン１
７ｃでかき落される。また、このフイン１７ｃ
は、ヒータ１７ｄで加熱されたカバーガスが上方
へ逃げるのを防止する役目もはたす。おもり１７
ａはスクレーパ１７がスラグ類を除去しながら自
重で貫通孔２０ａ内を降下できるためのものであ
る。 Next, the operation of the above device will be explained. The scraper 17 of the sodium removal device 10 is inserted into the through hole 20a of the upper core mechanism 20 which has been removed to replace the upper core tower equipment such as the control rod drive mechanism. At this time, the sodium removal device 10 is placed on the furnace upper pit lid 12. That is, after the sodium removal device 10 is placed and fixed on the furnace upper pit lid 12 via the door valve 13, the driving section 18
Operate the wire rope 18a and cable 1
8b is lowered, and the scraper 17 provided at the lower end thereof is inserted into the through hole 20a of the core upper mechanism 20. At this time, the slag blocking the through hole is heated by the heater 17a of the scraper 17 and softened. The cutting edges 17b are arranged with increasing diameters from bottom to top. Therefore, slag can be easily scraped off with the cutting edge 17b. Blade edge 1
The remaining slag that could not be scraped off by 7b is removed by Fin 1.
It is scraped off at 7c. Also, this Finn 17c
also serves to prevent the cover gas heated by the heater 17d from escaping upward. Weight 17
The symbol a allows the scraper 17 to descend inside the through hole 20a under its own weight while removing slag.
以上説明のように、本考案に係るナトリウム除
去装置は貫通孔に付着したスラグ類を加熱軟化さ
せて、機械的に除去するものであるため、作業効
率が高く、また、ワイヤーロープで昇降するもの
であるため貫通孔の長さに関係なく貫通孔内面を
清掃できる。また、貫通孔内面にガイドキーのよ
うな突起物があつても、スクレーパは貫通孔を上
下動するだけであるので、干渉部を形状的に逃げ
ることにより貫通孔内面を清掃できる。従がつ
て、スラグ類により機器の再挿入が阻害されるこ
とを防止できる。 As explained above, the sodium removal device according to the present invention heats and softens the slag adhering to the through-hole and removes it mechanically, so the work efficiency is high, and the device is lifted and lowered using a wire rope. Therefore, the inner surface of the through hole can be cleaned regardless of the length of the through hole. Further, even if there is a protrusion such as a guide key on the inner surface of the through hole, the scraper only moves up and down the through hole, so the inner surface of the through hole can be cleaned by geometrically escaping the interference portion. Therefore, it is possible to prevent the reinsertion of the device from being obstructed by slugs.
第１図は本考案に係るナトリウム除去装置の一
実施例を概略的に示す縦断面図、第２図は第１図
におけるスクレーパ部を拡大して示す断面図であ
る。
１０……ナトリウム除去装置、１１……遮蔽構
造物、１１ａ……１１の開口部、１２……炉上部
ピツト蓋、１３……床側ドアバルブ、１４……キ
ヤスクドアバルブ、１５……下部連結管、１６…
…キヤスク、１７……スクレーパ、１７ａ……お
もり、１７ｂ……刃先、１７ｃ……フイン、１７
ｄ……ヒータ、１８ａ……ワイヤーロープ、１８
……駆動部、１９……遮蔽プラグ、１８ｂ……ケ
ーブル、２０ａ……２０の貫通孔、２０……炉心
上部機構。
FIG. 1 is a longitudinal sectional view schematically showing an embodiment of the sodium removal device according to the present invention, and FIG. 2 is an enlarged sectional view showing the scraper section in FIG. 1. DESCRIPTION OF SYMBOLS 10... Sodium removal device, 11... Shield structure, 11a... Opening of 11, 12... Furnace upper pit lid, 13... Floor side door valve, 14... Cask door valve, 15... Lower connection Tube, 16...
...Cask, 17...Scraper, 17a...Weight, 17b...Blade tip, 17c...Fin, 17
d... Heater, 18a... Wire rope, 18
... Drive section, 19 ... Shielding plug, 18b ... Cable, 20a ... 20 through holes, 20 ... Core upper mechanism.
Claims (1)
のキヤスク内にあつて床側ドアバルブ下方の被清
掃部を清掃するスクレーパと、このスクレーパを
上下動する駆動部とから成り、このスクレーパは
最下部にヒータを具備し、中段および上段に順次
刃先および可撓性フインを備え、可撓性フインは
被清掃部である炉心上部機構に設けられた貫通孔
の内面に接触可能な大きさに形成してなるナトリ
ウム除去装置。 It consists of a cask installed above the floor door valve, a scraper inside the cask that cleans the area to be cleaned below the floor door valve, and a drive unit that moves this scraper up and down.This scraper has a heater at the bottom. The middle and upper stages are sequentially equipped with cutting edges and flexible fins, and the flexible fins are formed in a size that allows them to come into contact with the inner surface of a through hole provided in the upper core mechanism, which is the part to be cleaned. Sodium removal equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980006999U JPH0112239Y2 (en) | 1980-01-25 | 1980-01-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980006999U JPH0112239Y2 (en) | 1980-01-25 | 1980-01-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56109099U JPS56109099U (en) | 1981-08-24 |
| JPH0112239Y2 true JPH0112239Y2 (en) | 1989-04-10 |
Family
ID=29603658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980006999U Expired JPH0112239Y2 (en) | 1980-01-25 | 1980-01-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0112239Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212079U (en) * | 1976-05-10 | 1977-01-27 | ||
| JPS534189A (en) * | 1976-06-30 | 1978-01-14 | Toshiba Corp | Maintenance apparatus in fast breeder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50147094U (en) * | 1974-05-22 | 1975-12-05 |
-
1980
- 1980-01-25 JP JP1980006999U patent/JPH0112239Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5212079U (en) * | 1976-05-10 | 1977-01-27 | ||
| JPS534189A (en) * | 1976-06-30 | 1978-01-14 | Toshiba Corp | Maintenance apparatus in fast breeder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56109099U (en) | 1981-08-24 |
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