JPS637640B2 - - Google Patents
Info
- Publication number
- JPS637640B2 JPS637640B2 JP55118889A JP11888980A JPS637640B2 JP S637640 B2 JPS637640 B2 JP S637640B2 JP 55118889 A JP55118889 A JP 55118889A JP 11888980 A JP11888980 A JP 11888980A JP S637640 B2 JPS637640 B2 JP S637640B2
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- guide tube
- rod guide
- housing
- pressure vessel
- 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
- 238000003780 insertion Methods 0.000 claims description 11
- 230000037431 insertion Effects 0.000 claims description 11
- 239000000446 fuel Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 206010073306 Exposure to radiation Diseases 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 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
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
【発明の詳細な説明】
（発明の技術分野）
本発明は、沸騰水型原子炉における圧力容器に
設けられる制御棒案内管の固定装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a fixing device for a control rod guide tube provided in a pressure vessel in a boiling water nuclear reactor.
（従来の技術とその問題点）
従来の制御棒案内管の固定装置は、第１図及び
第２図に示されるように構成されている。(Prior art and its problems) A conventional control rod guide tube fixing device is constructed as shown in FIGS. 1 and 2.
即ち、第１図及び第２図において、圧力容器ａ
の内部炉心支持構造物の一部を構成する炉心支持
板ｂが水平に設けられており、この炉心支持板ｂ
の挿入孔b1には、制御棒案内管ｃが嵌装されてい
る。又、この制御棒案内管ｃの上部c1には、切欠
部ｄが形成されており、上記制御棒案内管ｃの上
部c1には、係止ピンｅを有する燃料支持金具（燃
料サポート）ｆが嵌装されている。さらに、上記
係止ピンｅは上記炉心支持板ｂ上に穿れた係止孔
ｇに上記切欠部ｄを通して挿入されている。他
方、上記制御棒案内管ｃの直下に位置する上記圧
力容器ａの底部a1には、周知の制御棒駆動機構の
ハウジングｈが上記制御棒案内管ｃのシール部c2
と接触するようにして水密に設けられており、上
記ハウジングｈ内には、サーマルスリーブｉが嵌
装されている。このハウジングｈの上部には、第
２図に拡大して示されるように、一対の切欠部ｊ
及び一対の雌型鍔部ｋが形成されており、上記制
御棒案内管ｃの下部には、一対の雄型鍔部ｌが、
上記ハウジングｈの両切欠部ｊを通して嵌合され
ており、上記サーマルスリーブｉ自体は、略90゜
回動することにより、第２図に示すように、雄型
鍔部ｌと雌型鍔部ｋとを係止して上・下方向に抜
け出ないように固定されている。 That is, in FIGS. 1 and 2, pressure vessel a
A core support plate b that constitutes a part of the internal core support structure is provided horizontally, and this core support plate b
A control rod guide tube c is fitted into the insertion hole b1 . In addition, a notch d is formed in the upper part c1 of the control rod guide tube c, and a fuel support fitting (fuel support) having a locking pin e is formed in the upper part c1 of the control rod guide tube c. f is fitted. Furthermore, the locking pin e is inserted into a locking hole g drilled on the core support plate b through the notch d. On the other hand, at the bottom a1 of the pressure vessel a located directly below the control rod guide tube c, a housing h of a well-known control rod drive mechanism is installed at a sealing portion c2 of the control rod guide tube c.
The thermal sleeve i is fitted into the housing h in a watertight manner so as to be in contact with the housing h. In the upper part of the housing h, there is a pair of notches j, as shown enlarged in FIG.
A pair of female flanges k are formed at the bottom of the control rod guide tube c, and a pair of male flanges l are formed at the bottom of the control rod guide tube c.
The thermal sleeve i is fitted through both notches j of the housing h, and by rotating approximately 90 degrees, the male flange l and the female flange k are connected to each other, as shown in FIG. It is fixed to prevent it from slipping out upward or downward.
しかして、上記燃料支持金具ｆには、断面が十
字形をなす制御棒ｍのスピードリミツタm1が上
記制御棒駆動機構の上端部に弾発的に係止するよ
うに挿入されており、上記燃料支持金具ｆには、
断面が四角形をなす４本の燃料集合体ｎの下部n1
が上記スピードリミツタm1の上位に位置するよ
うにして嵌装されている。 A speed limiter m1 of a control rod m having a cross-shaped cross section is inserted into the fuel support fitting f so as to elastically engage with the upper end of the control rod drive mechanism, The above fuel support fitting f includes:
Lower part n 1 of four fuel assemblies n with a square cross section
is fitted so that it is positioned above the speed limiter m1 above.
しかしながら、上述した従来の制御棒案内管の
固定装置は、長さ約４ｍのサーマルスリーブｉを
上記圧力容器ａの下部より保持しながら、第２図
に示されるように、上記ハウジングｈの切欠部ｊ
を通して嵌合し、挿入角度を合せ、雄型鍔部ｌと
雌型鍔部ｈとを略90゜回動して固定するようにな
つているため、取扱い操作が困難であるばかりで
なく、上記ハウジングｈの上部開口部内に制御棒
案内管ｃのシール部c2を挿入して嵌合する構成を
採用しているため、圧力容器ａ内の炉水がサーマ
ルスリーブｉ内に漏洩することも予測される。 However, in the conventional control rod guide tube fixing device described above, while holding the thermal sleeve i having a length of about 4 m from the lower part of the pressure vessel a, as shown in FIG. j
Since the male flange l and female flange h are fixed by rotating approximately 90 degrees after fitting through and matching the insertion angle, handling operations are not only difficult, but also the above-mentioned Since the seal part c2 of the control rod guide tube c is inserted and fitted into the upper opening of the housing h, it is predicted that the reactor water in the pressure vessel a will leak into the thermal sleeve i. be done.
本発明は、上述した難点を解消するため、固定
時の取扱い操作を簡素化すると共に、炉水の漏洩
を防止し、併せて、被曝を低減するようにした制
御棒案内管の固定装置を提供することを目的とす
る。
In order to solve the above-mentioned difficulties, the present invention provides a control rod guide tube fixing device that simplifies handling operations during fixation, prevents leakage of reactor water, and reduces radiation exposure. The purpose is to
本発明は、圧力容器の炉心支持板に挿入孔を穿
設し、この挿入孔に制御棒案内管を嵌装し、この
制御棒案内管の下部にバイオネツトの雌型係止部
を設け、上記制御棒案内管の直下の上記圧力容器
の底板に制御棒駆動機構のハウジングを水密に植
設し、このハウジングの上部に上記雌型係合部に
係合するバイオネツトの雄型係合部を形成し、上
記ハウジングが上記制御棒案内管の下部を嵌合し
たとき、上記ハウジングの上部が上記下部よりも
上方へ突出して嵌合するようにして、固定時の操
作を容易にすると共に、併せて、炉水の漏洩を防
止するように構成したものである。
The present invention comprises: drilling an insertion hole in the core support plate of a pressure vessel; fitting a control rod guide tube into the insertion hole; and providing a female bayonet locking portion at the bottom of the control rod guide tube; A housing for a control rod drive mechanism is watertightly implanted in the bottom plate of the pressure vessel directly below the control rod guide tube, and a male bayonet engaging part that engages with the female engaging part is provided on the upper part of the housing. and when the housing fits into the lower part of the control rod guide tube, the upper part of the housing protrudes upwardly than the lower part to facilitate the fixing operation, and Additionally, it is constructed to prevent leakage of reactor water.
（発明の実施例）
以下、本発明を図示の一実施例について説明す
る。(Embodiment of the Invention) The present invention will be described below with reference to an illustrated embodiment.
第３図及び第４図において、符号１は、炉水を
容れた圧力容器であつて、この圧力容器１の内部
には、炉心構造物の一部をなす炉心支持板２が水
平にして設けられており、この炉心支持板２に
は、挿入孔３が穿設されている。又、この挿入孔
３には、制御棒案内管４が嵌装されており、この
制御棒案内管４の上部４ａには、切欠部５が形成
されている。さらに、上記制御棒案内管４の上部
４ａには、係止ピン６を有する燃料支持金具７が
嵌装されており、上記係止ピン６は上記炉心支持
板２に穿設された係止孔８に上記切欠部５を通し
て挿入されている。 In FIGS. 3 and 4, reference numeral 1 denotes a pressure vessel containing reactor water. Inside this pressure vessel 1, a core support plate 2, which forms part of the core structure, is installed horizontally. The core support plate 2 is provided with an insertion hole 3. A control rod guide tube 4 is fitted into the insertion hole 3, and a notch 5 is formed in an upper portion 4a of the control rod guide tube 4. Furthermore, a fuel support fitting 7 having a locking pin 6 is fitted into the upper part 4a of the control rod guide tube 4, and the locking pin 6 is inserted into a locking hole drilled in the core support plate 2. 8 through the notch 5.
一方、上記制御棒案内管４の下部４ｂには、第
４図に拡大して示されるように、シール部を兼ね
たバイオネツト（２つの部材を相互に位相を合せ
て連結した後、一方を回動して一体的に固着する
手段）９の一対の雌型係合部９ａ及び一対の切欠
部９ｂが設けられており、この一対の雌型係合部
９ａは後述するハウジング１０の上部１０ａに設
けられたバイオネツト９をなす雄型係合部１０ｂ
に着脱自在に係合して固着し得るようになつてい
る。又、上記制御棒案内管４の直下の圧力容器１
の底板１ａには、制御棒駆動機構（図示されず）
のハウジング１０が水密に植設されており、この
ハウジング１０内には、サーマルスリーブ１１が
嵌装されている。 On the other hand, in the lower part 4b of the control rod guide tube 4, as shown in an enlarged view in FIG. A pair of female-type engaging portions 9a and a pair of cut-out portions 9b are provided in the means for rotating and integrally fixing the housing 10, which will be described later. A male engaging portion 10b forming the bayonet 9 provided in the
It is designed so that it can be removably engaged with and fixed to. In addition, the pressure vessel 1 directly below the control rod guide tube 4
The bottom plate 1a includes a control rod drive mechanism (not shown).
A housing 10 is installed in a watertight manner, and a thermal sleeve 11 is fitted inside this housing 10.
特に、上記ハウジング１０の上部１０ａには、
上記制御棒案内管４の下部４ｂを嵌合したとき、
この下部４ｂよりも上方へ突出して上記制御棒案
内管４内へ突入し、これにより、圧力容器１内の
軽水がサーマルスリーブ１１内へ漏洩するのを防
止している。 In particular, in the upper part 10a of the housing 10,
When the lower part 4b of the control rod guide tube 4 is fitted,
It protrudes upward from the lower part 4b and enters the control rod guide tube 4, thereby preventing light water in the pressure vessel 1 from leaking into the thermal sleeve 11.
他方、上記燃料支持金具７には、断面が十字形
をなす制御棒１２と一体をなすスピードリミツタ
１３が、上記制御棒駆動機構の上端部に弾発的に
係合するように挿入されており、上記燃料支持金
具７の開口部には、断面が四角形をなす４本の燃
料集合体１４が上記スピードリミツタ１３の上位
に位置して嵌装されている。 On the other hand, a speed limiter 13, which is integral with a control rod 12 having a cross-shaped cross section, is inserted into the fuel support fitting 7 so as to elastically engage with the upper end of the control rod drive mechanism. Four fuel assemblies 14 having a rectangular cross section are fitted into the opening of the fuel support fitting 7 so as to be positioned above the speed limiter 13.
従つて、今、炉心支持板２に制御棒案内管４を
固定する場合には、予め、制御棒案内機構のハウ
ジング１０及びサーマルスリーブ１１を圧力容器
１の底部１ａに設けておく。次に、炉心支持板２
の挿入孔３に上方から制御棒案内管４を嵌装す
る。 Therefore, when fixing the control rod guide tube 4 to the core support plate 2 now, the housing 10 of the control rod guide mechanism and the thermal sleeve 11 are provided in the bottom portion 1a of the pressure vessel 1 in advance. Next, the core support plate 2
The control rod guide tube 4 is fitted into the insertion hole 3 from above.
この時、バイオネツト９の各雌型係合部９ａに
隣接する一対の切欠部９ｂは上記ハウジング１０
の各雄型係合部１０ｂに嵌合するように降下す
る。 At this time, a pair of notches 9b adjacent to each female engaging portion 9a of the bayonet 9 are connected to the housing 10.
It descends so as to fit into each of the male engaging portions 10b.
次に、上記制御棒案内管４を約90゜回動するこ
とにより、上記バイオネツト９の両雌型係合部９
ａとハウジング１０の両雄型係合部１０ｂとが、
第４図に示されるように、重合して固定され、上
記制御棒案内管４は上記ハウジング１０と実質的
に一体となり、上方へ抜出すことなく固着され
る。 Next, by rotating the control rod guide tube 4 by approximately 90 degrees, both female engaging portions 9 of the bayonet 9 are rotated.
a and the bimale engaging portion 10b of the housing 10,
As shown in FIG. 4, they are fixed by overlapping, and the control rod guide tube 4 is substantially integrated with the housing 10, and is fixed without being pulled out upwards.
しかして、制御棒１２を制御棒案内管４に挿入
した後、この制御棒案内管４に燃料支持金具７を
嵌装する。すると、この燃料支持金具７の係止ピ
ン６が炉心支持板２の係止孔８に前記切欠部５を
通して挿入され、次に、各燃料集合体１４がスピ
ートリミツタ１３の上位に位置して嵌装される。 After the control rod 12 is inserted into the control rod guide tube 4, the fuel support fitting 7 is fitted into the control rod guide tube 4. Then, the locking pin 6 of the fuel support fitting 7 is inserted into the locking hole 8 of the core support plate 2 through the notch 5, and then each fuel assembly 14 is positioned above the speed limiter 13 and fitted. be done.
次に、第５図に示される実施例は、本発明の他
の実施例であつて、これはバイオネツト９の複数
の雌型係合部９ａに複数の雄型係合部１０ｂを設
けて、均等に保持し、しかも、シール部を兼ねて
密着して嵌合するようにしたものであり、上述し
た実施例と同じ構成をなすものである。 Next, the embodiment shown in FIG. 5 is another embodiment of the present invention, in which a plurality of male engagement parts 10b are provided in a plurality of female engagement parts 9a of the bayonet 9. , are held evenly, and also serve as a sealing part so that they fit in close contact with each other, and have the same structure as the above-mentioned embodiment.
又、第６図に示される実施例は、本発明の他の
実施例であつて、これは炉心支持板２上に係止孔
１５ａを有する係止片１５をあらたに設け、上記
燃料支持金具７の係止ピン６を上記係止孔１５ａ
に切欠部５を通して嵌装したものであり、これに
より炉心支持板２に、直接、係止孔８を穿設する
ことなくしたものである。 Further, the embodiment shown in FIG. 6 is another embodiment of the present invention, in which a locking piece 15 having a locking hole 15a is newly provided on the core support plate 2, and the above-mentioned fuel support fittings are 7 locking pin 6 into the locking hole 15a.
The locking hole 8 is inserted into the core support plate 2 through the notch 5, thereby eliminating the need to directly drill the locking hole 8 in the core support plate 2.
因に、上述した実施例のバイオネツト９は、雌
型係合部９ａと雄型係合部１０ｂとを逆に設ける
ように設計変更することは自由である。 Incidentally, the design of the bayonet 9 of the above-described embodiment can be freely changed so that the female type engaging part 9a and the male type engaging part 10b are provided in reverse.
以上述べたように本発明によれば、圧力容器１
の炉心支持板２に挿入孔３を穿設し、この挿入孔
３に制御棒案内管４を嵌装し、この制御棒案内管
４の下部にバイオネツト９雌型の係止部９ａを設
け、上記制御棒案内管４の直下の上記圧力容器１
の底板１ａに御棒駆動機構のハウジング１０を水
密に植設し、このハウジング１０の上部１０ａに
上記雌型係合部９ｂに係合するバイオネツト９の
雌型係合部１０ｂを形成し、上記ハウジング１０
が上記制御棒案内管４の下部４ｂを嵌合したと
き、上記ハウジング１０の上部１０ａが上記下部
４ｂよりも上方へ突出して嵌合するようにしてあ
るので、取扱い操作も容易になり、炉水の漏洩を
低減できるから、取扱い操作時、放射線による被
曝も防止することができる。
As described above, according to the present invention, the pressure vessel 1
An insertion hole 3 is bored in the core support plate 2 of the core, a control rod guide tube 4 is fitted into the insertion hole 3, and a female bayonet 9 locking portion 9a is provided at the lower part of the control rod guide tube 4. , the pressure vessel 1 directly below the control rod guide tube 4
A housing 10 of the rod drive mechanism is watertightly implanted in the bottom plate 1a of the housing 10, and a female engaging portion 10b of the bayonet 9 that engages with the female engaging portion 9b is formed in the upper portion 10a of the housing 10. The housing 10 above
When the lower part 4b of the control rod guide tube 4 is fitted into the housing 10, the upper part 10a of the housing 10 projects upwardly than the lower part 4b. Since the leakage of radiation can be reduced, exposure to radiation during handling operations can also be prevented.
第１図及び第２図は、従来の制御棒案内管の固
定装置を説明するための各図、第３図は、本発明
による制御棒案内管の固定装置の断面図、第４図
は、第３図中の鎖線Ｂ−Ｂに沿う拡大断面図、第
５図及び第６図は、本発明の他の実施例を示す各
図である。
１…圧力容器、２…炉心支持板、４…制御棒案
内管、６…係止ピン、８…係止孔、９…バイオネ
ツト、９ａ…雌型係合部、９ｂ…切欠部、１０…
ハウジング、１０ｂ…雄型係合部、１２…制御
棒、１４…燃料集合体。
1 and 2 are diagrams for explaining a conventional control rod guide tube fixing device, FIG. 3 is a sectional view of a control rod guide tube fixing device according to the present invention, and FIG. An enlarged sectional view taken along the chain line B--B in FIG. 3, FIGS. 5 and 6 are views showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Pressure vessel, 2... Core support plate, 4... Control rod guide tube, 6... Locking pin, 8... Locking hole, 9... Bayonet, 9a... Female engagement part, 9b... Notch, 10...
Housing, 10b...Male engaging portion, 12...Control rod, 14...Fuel assembly.
Claims (1)
の挿入孔に制御棒案内管を嵌装し、この制御棒案
内管の下部にバイオネツト雌型の係止部を設け、
上記制御棒案内管の直下の上記圧力容器の底板に
制御棒駆動機構のハウジングを水密に植設し、こ
のハウジングの上部に上記雌型係合部に係合する
バイオネツトの雄型係合部を形成し、上記ハウジ
ングが上記制御棒案内管の下部を嵌合したとき、
上記ハウジングの上部が上記下部よりも上方へ突
出して嵌合するようにしたことを特徴とする制御
棒案内管の固定装置。1. Drill an insertion hole in the core support plate of the pressure vessel, fit a control rod guide tube into this insertion hole, provide a bayonet female locking part at the bottom of this control rod guide tube,
A housing for a control rod drive mechanism is watertightly implanted in the bottom plate of the pressure vessel directly below the control rod guide tube, and a male bayonet engaging part that engages with the female engaging part is provided on the upper part of the housing. and when the housing fits into the lower part of the control rod guide tube,
A fixing device for a control rod guide tube, characterized in that the upper part of the housing protrudes higher than the lower part and is fitted into the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55118889A JPS5742894A (en) | 1980-08-28 | 1980-08-28 | Fastening device for control rod guide tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55118889A JPS5742894A (en) | 1980-08-28 | 1980-08-28 | Fastening device for control rod guide tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5742894A JPS5742894A (en) | 1982-03-10 |
| JPS637640B2 true JPS637640B2 (en) | 1988-02-17 |
Family
ID=14747648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55118889A Granted JPS5742894A (en) | 1980-08-28 | 1980-08-28 | Fastening device for control rod guide tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5742894A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5970994A (en) * | 1982-10-15 | 1984-04-21 | 株式会社東芝 | Supporting device for control rod drive housing |
| DE102011108802B4 (en) * | 2011-07-29 | 2013-02-21 | Areva Np Gmbh | Connection between control rod guide tube and drive housing tube of a nuclear reactor |
-
1980
- 1980-08-28 JP JP55118889A patent/JPS5742894A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5742894A (en) | 1982-03-10 |
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