JPH03125996A - High temperature gas reactor - Google Patents
High temperature gas reactorInfo
- Publication number
- JPH03125996A JPH03125996A JP1263964A JP26396489A JPH03125996A JP H03125996 A JPH03125996 A JP H03125996A JP 1263964 A JP1263964 A JP 1263964A JP 26396489 A JP26396489 A JP 26396489A JP H03125996 A JPH03125996 A JP H03125996A
- Authority
- JP
- Japan
- Prior art keywords
- control rod
- guide tube
- rod guide
- insertion hole
- column
- 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
- Monitoring And Testing Of 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】
［発明の目的］
（産業上の利用分野）
本発明は高温ガス冷却型原子炉（以下高温ガス炉という
）に係り、特に制御棒案内管と制御棒挿入孔との接続構
造に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a high-temperature gas-cooled nuclear reactor (hereinafter referred to as a high-temperature gas reactor), and particularly relates to a control rod guide tube and a control rod insertion hole. It is related to the connection structure.
（従来の技術）
一般に高温ガス炉は第７図に示すように、炉容器１と、
この炉容器１内に収納された炉心２と、この炉心２を支
持する炉心支持部材３と、上記炉容器１の上部に設けら
れた複数本のスタンドパイプ４と、これらのスタンドパ
イプ４に収納された制御棒駆動装置５とから構成され、
炉容器１内には冷却材としてヘリウムガスが数十気圧の
高圧状態で充填されている。(Prior Art) Generally, a high-temperature gas furnace has a furnace vessel 1, as shown in FIG.
A reactor core 2 housed in this reactor vessel 1, a reactor core support member 3 that supports this reactor core 2, a plurality of standpipes 4 provided at the upper part of the above-mentioned reactor vessel 1, and a plurality of standpipes 4 that are housed in these standpipes 4. and a control rod drive device 5,
The furnace vessel 1 is filled with helium gas as a coolant under high pressure of several tens of atmospheres.
また、炉容器１の下部には外管６が接続され、この外管
６から炉容器１内に流入したヘリウムガスは下部ブレナ
ム７、間隙部８．上部ブレナム９゜炉心２．高温ブレナ
ム１０を順次流通し、外管６の内側に設けられた内管１
１を通っぞ炉外へ流出するようになっている。Further, an outer tube 6 is connected to the lower part of the furnace vessel 1, and the helium gas flowing into the furnace vessel 1 from the outer tube 6 is transferred to the lower blennium 7, the gap 8. Upper Blenheim 9° Core 2. The inner pipe 1 is passed through the high-temperature blemish 10 in sequence and is provided inside the outer pipe 6.
It is designed to flow out of the furnace through 1.
一方、前記制御棒駆動装置５は第８図に示すように、ド
ラム１２の外周に巻回されたワイヤローブ１３の下端に
連結金具１４を介して制御棒１５を保持しており、上記
ドラム１２と減速機構１６を介して連結した駆動モータ
１７によりワイヤローブ１３を巻き取ったり繰り出した
りすることによって制御棒１５を昇降させる構造となっ
ている。On the other hand, as shown in FIG. 8, the control rod driving device 5 holds a control rod 15 via a connecting fitting 14 at the lower end of a wire lobe 13 wound around the outer periphery of a drum 12. The control rod 15 is raised and lowered by winding and unwinding the wire lobe 13 by a drive motor 17 connected via a speed reduction mechanism 16.
また、このように構成される高温ガス炉の炉心２は第９
図および第１０図に示すように、六角形をなす制御棒カ
ラム黒鉛ブロック１８と燃料カラム黒鉛ブロック１９を
複数段に積み重ねて構成されており、制御棒カラム黒鉛
ブロック１８の周囲には６個の燃料カラム黒鉛ブロック
１９が配置されている。また、制御棒カラム黒鉛ブロッ
ク１８には複数個（図では３個）の制御棒挿入孔２０が
形成されている。これらの制御棒挿入孔２０の上部には
第１１図に示すように制御棒案内管２１の下端部が挿入
されており、前記制御棒１５はこれらの制御棒案内管２
１および制御棒挿入孔２０内を昇降するようになってい
る。In addition, the core 2 of the high temperature gas reactor configured in this way has a ninth
As shown in the figure and FIG. 10, the hexagonal control rod column graphite block 18 and fuel column graphite block 19 are stacked in multiple stages, and the control rod column graphite block 18 is surrounded by six pieces. A fuel column graphite block 19 is arranged. Further, a plurality of (three in the figure) control rod insertion holes 20 are formed in the control rod column graphite block 18 . As shown in FIG. 11, the lower ends of control rod guide tubes 21 are inserted into the upper portions of these control rod insertion holes 20, and the control rods 15 are inserted into these control rod guide tubes 2.
1 and the inside of the control rod insertion hole 20.
なお、最上段の制御棒カラム黒鉛ブロック１８および燃
料カラム黒鉛ブロック１９の上部には、これらの黒鉛ブ
ロックと同一形状の中性子遮蔽体２２．２３が配置され
、燃料カラム黒鉛ブロック１９の上部に配置された燃料
カラム上部中性子遮蔽体２３の上面のほうが制御棒カラ
ム黒鉛ブロック１８の上部に配置された制御棒カラム上
部中性子遮蔽体２２の上面より高くなっている。また、
前記制御棒案内管２１の上端部はスタンドパイプ４内に
設けられた案内管支持部材２４の下面に固定されている
。Note that neutron shields 22 and 23 having the same shape as these graphite blocks are arranged above the control rod column graphite block 18 and the fuel column graphite block 19 in the uppermost stage; The upper surface of the fuel column upper neutron shield 23 is higher than the upper surface of the control rod column upper neutron shield 22 disposed above the control rod column graphite block 18. Also,
The upper end portion of the control rod guide tube 21 is fixed to the lower surface of a guide tube support member 24 provided within the stand pipe 4.
（発明が解決しようとする課題）
ところで、このような高温ガス炉では多数の黒鉛ブロッ
クを蜂の巣状に配置して炉心２を構成しているため、隣
接する黒鉛ブロック間に生じるギャップにより制御棒カ
ラム黒鉛ブロック１８の位置がずれる可能性がある。ま
た、スタンドパイプ４の加工精度や据付精度などにより
スタンドパイプ４と制御棒カラム黒鉛ブロック１８との
相対的な位置関係がずれる可能性もあり、これらの要因
によって制御棒案内管２１の軸芯と制御棒挿入孔２０の
軸芯とが一致しなくなり、制御棒案内管２１を制御棒挿
入孔２０に接続できなくなることが予想される。また、
たとえ接続できたとしても制御棒案内管２１と制御棒挿
入孔２０の軸芯が一致していない状態で制御棒案内管２
１を制御棒挿入孔２０に接続すると、制御棒案内管２１
の上端部は案内管支持部材２４に固定されているため、
制御棒案内管２１と案内管支持部材２４との結合部付近
に過大な応力が発生し、好ましくないという問題があっ
た。(Problem to be Solved by the Invention) Incidentally, in such a high-temperature gas reactor, the core 2 is constructed by arranging a large number of graphite blocks in a honeycomb shape, so the control rod columns are separated due to the gaps created between adjacent graphite blocks. The position of the graphite block 18 may shift. In addition, there is a possibility that the relative positional relationship between the standpipe 4 and the control rod column graphite block 18 may shift depending on the machining accuracy and installation accuracy of the standpipe 4, and due to these factors, the axis of the control rod guide tube 21 and It is expected that the axes of the control rod insertion holes 20 will no longer match and the control rod guide tubes 21 will not be able to be connected to the control rod insertion holes 20. Also,
Even if the connection is possible, the axes of the control rod guide tube 21 and the control rod insertion hole 20 do not match.
1 to the control rod insertion hole 20, the control rod guide tube 21
Since the upper end of is fixed to the guide tube support member 24,
There is a problem in that excessive stress is generated in the vicinity of the joint between the control rod guide tube 21 and the guide tube support member 24, which is not desirable.
本発明はこのような問題点に鑑みてなされたもので、制
御棒案内管と制御棒挿入孔の軸芯とが多少ずれていても
互いに接続することができ、しかも制御棒案内管に過大
な応力が発生することがなく、制御棒案内管と制御棒挿
入孔との接続構造の信頼性を高めることのできる高温ガ
ス炉を提供することを目的とするものである。The present invention has been made in view of these problems, and allows the control rod guide tube and the control rod insertion hole to be connected to each other even if the axes of the control rod insertion hole are slightly misaligned. It is an object of the present invention to provide a high-temperature gas reactor that does not generate stress and can improve the reliability of the connection structure between a control rod guide tube and a control rod insertion hole.
［発明の構成］
（課題を解決するための手段）
上記目的を達成するために本発明は、炉容器と、この炉
容器内に収納され制御棒挿入孔を有する制御棒カラム黒
鉛ブロックの周囲に燃料カラム黒鉛ブロックを配設して
なる炉心と、上記炉容器の上部に設けられた複数本のス
タンドパイプと、これらのスタンドパイプ内に収納され
前記制御棒挿入孔と制御棒案内管を介して接続される制
御棒駆動装置とを有する高温ガス炉において、前記制御
棒カラム黒鉛ブロックの上部に配置される制御棒カラム
上部中性子遮蔽体と前記燃料カラム黒鉛ブロックの上部
に配置される燃料カラム上部中性子遮蔽体との間にテー
パ部を有する段差部を形成すると共に上記段差部によっ
て形成される凹部に嵌合する嵌合部材を前記制御棒案内
管の下部に設け、かつ前記制御棒案内管の上端部を上下
方向および水平方向に移動自在に支持したものである。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a reactor vessel, and a control rod column graphite block housed in the reactor vessel and having a control rod insertion hole. A reactor core having fuel column graphite blocks arranged therein, a plurality of standpipes provided at the upper part of the reactor vessel, and a plurality of standpipes housed within these standpipes and connected through the control rod insertion holes and control rod guide tubes. A high-temperature gas reactor having a control rod drive device connected thereto, a control rod column upper neutron shield disposed above the control rod column graphite block and a fuel column upper neutron shield disposed above the fuel column graphite block. A fitting member is provided at the lower part of the control rod guide tube, the fitting member forming a step part having a tapered part between the shielding body and fitting into the recess formed by the step part, and at the upper end of the control rod guide tube. The parts are supported movably in the vertical and horizontal directions.
（作 用）
すなわち、本発明は制御棒カラム上部中性子遮蔽体と燃
料カラム上部中性子遮蔽体との間にテーパ部を有する段
差部を形成すると共に上記段差部によって形成される凹
部に嵌合する嵌合部材を制御棒案内管の下部に設けるこ
とにより、段差部のテーパ部と嵌合部材のテーパ部がガ
イドの役目を果たすため、制御棒案内管の軸芯と制御棒
挿入孔の軸芯が多少ずれていても制御棒案内管と制御棒
挿入孔を互いに接続することができる。また、本発明は
制御棒案内管の上端部が上下方向および水平方向に移動
自在に支持されているので、制御棒案内管と制御棒挿入
孔の軸芯が一致しない状態で制御棒案内管と制御棒挿入
孔を接続しても制御棒案内管に過大な応力が発生するこ
ともない。(Function) That is, the present invention forms a stepped portion having a tapered portion between the control rod column upper neutron shield and the fuel column upper neutron shield, and also provides a fitting that fits into the recess formed by the stepped portion. By providing the mating member at the bottom of the control rod guide tube, the tapered part of the stepped part and the tapered part of the mating member serve as guides, so that the axis of the control rod guide tube and the axis of the control rod insertion hole are aligned. The control rod guide tube and the control rod insertion hole can be connected to each other even if they are slightly misaligned. Furthermore, in the present invention, since the upper end of the control rod guide tube is supported so as to be movable in the vertical and horizontal directions, the control rod guide tube and the control rod guide tube can be connected in a state where the axes of the control rod guide tube and the control rod insertion hole do not match. Even if the control rod insertion hole is connected, excessive stress will not be generated in the control rod guide tube.
（実施例） 以下、図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図ないし第３図は本発明による制御棒案内管２１と
制御棒挿入孔２０との接続構造の一実施例を示し、この
実施例の制御棒カラム上部中性子遮蔽体２２と燃料カラ
ム上部中性子遮蔽体２３との間にはテーパ部２６を有す
る段差部２５が形成されている。そして、制御棒案内管
２１の下部には上記段差部２５によって形成される六角
形状の凹部２７に嵌合する嵌合部材２８が複数本（図で
は３本）の制御棒案内管２１を束ねるように設けられて
いる。なお、この嵌合部材２８は制御棒案内管２１同士
の間隔を保持するスペーサの役割も兼ねている。1 to 3 show an embodiment of the connection structure between the control rod guide tube 21 and the control rod insertion hole 20 according to the present invention, and the control rod column upper neutron shield 22 and the fuel column upper neutron shield of this embodiment A stepped portion 25 having a tapered portion 26 is formed between the shielding member 23 and the shielding member 23 . At the bottom of the control rod guide tube 21, a fitting member 28 that fits into a hexagonal recess 27 formed by the stepped portion 25 is provided so as to bundle a plurality (three in the figure) of the control rod guide tubes 21. It is set in. Note that this fitting member 28 also serves as a spacer that maintains the interval between the control rod guide tubes 21.
一方、制御棒案内管２１の上端部にはスペーサを兼ねた
円形の支持板２９が設けられている。この支持板２９は
案内管支持部材２４の下部に設けられた円筒フレーム３
０内に収容保持されており、これによって制御棒案内管
２１を上下方向および水平方向に移動自在に支持してい
る。On the other hand, a circular support plate 29 that also serves as a spacer is provided at the upper end of the control rod guide tube 21 . This support plate 29 is a cylindrical frame 3 provided at the lower part of the guide tube support member 24.
0, thereby supporting the control rod guide tube 21 so as to be movable in the vertical and horizontal directions.
第４図ないし第６図は制御棒案内管２１を制御棒挿入孔
２０に接続する際の作用を示したもので、第４図に示す
ように制御棒案内管２１の軸芯と制御棒挿入孔２０の軸
芯とが多少ずれていても第５図に示すように段差部２５
のテーパ部２６と嵌合部材２８のテーパ部がガイドの役
目を果たすので、第６図に示すように制御棒案内管２１
の下端部を制御棒挿入孔２０に嵌め込むことができる。Figures 4 to 6 show the operation when connecting the control rod guide tube 21 to the control rod insertion hole 20. As shown in Figure 4, the axis of the control rod guide tube 21 and the control rod insertion Even if the axis of the hole 20 is slightly misaligned, the stepped portion 25 will be removed as shown in FIG.
Since the tapered portion 26 of the control rod guide tube 21 and the tapered portion of the fitting member 28 serve as guides, the control rod guide tube 21
The lower end portion of the control rod insertion hole 20 can be fitted into the control rod insertion hole 20.
また、このとき制御棒案内管２１は多少類いた状態とな
るが、制御棒案内管２１は案内管支持部材２４の下部に
設けられた円筒フレーム３０に上下方向および水平方向
に移動自在に支持されているので、制御棒案内管２１に
過大な応力が発生することもない。Also, at this time, the control rod guide tube 21 is in a somewhat similar state, but the control rod guide tube 21 is supported by a cylindrical frame 30 provided at the bottom of the guide tube support member 24 so as to be movable vertically and horizontally. Therefore, excessive stress is not generated in the control rod guide tube 21.
なお、段差部２５のテーパ部２６の幅と嵌合部材２８の
テーパ部の幅とを足し合わせた合計量をブロックギャッ
プ、スタンドパイプ４の据付公差及び傾き等から計算さ
れる制御棒案内管２１と制御棒挿入孔２０との軸芯の最
大ずれ量よりも大きくしておけば、制御棒案内管２１を
制御棒挿入孔２０に確実に接続することができる。Note that the total amount of the width of the tapered portion 26 of the stepped portion 25 and the width of the tapered portion of the fitting member 28 is calculated from the block gap, the installation tolerance of the stand pipe 4, the inclination, etc. of the control rod guide tube 21. By making the maximum misalignment between the axes of the control rod insertion hole 20 and the control rod guide tube 21 more securely, the control rod guide tube 21 can be reliably connected to the control rod insertion hole 20.
また、本実施例では原子炉構造部材の熱膨脹やスウェリ
ング等により案内管支持部材２４と制御棒カラム上部中
性子遮蔽体１８との相対距離が変化しても相対距離の変
化量を円筒フレーム３０の高さによって十分吸収できる
ので、制御棒案内管２１が制御棒挿入孔２０から外れる
ようなことがなく、常に良好な接続状態を保つことがで
きる。Furthermore, in this embodiment, even if the relative distance between the guide tube support member 24 and the control rod column upper neutron shield 18 changes due to thermal expansion or swelling of the reactor structural members, the amount of change in the relative distance is calculated by the cylindrical frame 30. Since it can be sufficiently absorbed by the height, the control rod guide tube 21 will not come off from the control rod insertion hole 20, and a good connection state can always be maintained.
［発明の効果］
以上説明したように本発明によれば、制御棒案内管と制
御棒挿入孔の軸芯が多少ずれていても互いに接続するこ
とができ、しかも制御棒案内管に過大な応力が発生する
ことがなく、制御棒案内管と制御棒挿入孔との接続構造
の信頼性を高めることのできる高温ガス炉を提供できる
。[Effects of the Invention] As explained above, according to the present invention, even if the axes of the control rod guide tube and the control rod insertion hole are slightly misaligned, they can be connected to each other, and there is no need to apply excessive stress to the control rod guide tube. It is possible to provide a high-temperature gas reactor in which the reliability of the connection structure between the control rod guide tube and the control rod insertion hole can be improved without occurrence of the problem.
第１図は本発明による制御棒案内管と制御棒挿入孔との
接続構造の一実施例を示す断面図、第２図は第１図の■
−■線に沿った断面図、第３図は第１図の■−■線に沿
った断面図、第４図ないし第６図は同実施例の作用説明
図、第７図は高温ガス炉の概略図、第８図は制御棒駆動
装置の構成図、第９図は炉心の構造を示す平面図、第１
０図は第９図のＸ−Ｘ線に沿った断面図、第１１図は従
来の制御棒案内管と制御棒挿入孔との接続構造を示す断
面図である。
１・・・炉容器、２・・・炉心、４・・・スタンドパイ
プ、５・・・制御棒駆動装置、１３・・・ワイヤローブ
、１５・・・制御棒、１８・・・制御棒カラム黒鉛ブロ
ック、１９・・・燃料カラム黒鉛ブロック、２０・・・
制御棒挿入孔、２１・・・制御棒案内管、２２・・・制
御棒カラム上部中性子遮蔽体、２３・・・燃料カラム上
部中性子遮蔽体、２４・・・案内管支持部材、２５・・
・段差部、２６・・・テーパ部、２７・・・凹部、２８
・・・嵌合部材、２９・・・支持板、３０・・・円筒フ
レーム。FIG. 1 is a sectional view showing an embodiment of the connection structure between the control rod guide tube and the control rod insertion hole according to the present invention, and FIG.
3 is a sectional view taken along the line 2--2 in FIG. 8 is a schematic diagram of the control rod drive system, FIG. 9 is a plan view showing the structure of the core,
0 is a sectional view taken along the line X--X in FIG. 9, and FIG. 11 is a sectional view showing a conventional connection structure between a control rod guide tube and a control rod insertion hole. DESCRIPTION OF SYMBOLS 1... Reactor vessel, 2... Reactor core, 4... Stand pipe, 5... Control rod drive device, 13... Wire lobe, 15... Control rod, 18... Control rod column graphite Block, 19...Fuel column graphite block, 20...
Control rod insertion hole, 21... Control rod guide tube, 22... Control rod column upper neutron shield, 23... Fuel column upper neutron shield, 24... Guide tube support member, 25...
・Step part, 26...Tapered part, 27...Concave part, 28
... Fitting member, 29... Support plate, 30... Cylindrical frame.
Claims (1)
る制御棒カラム黒鉛ブロックの周囲に複数個の燃料カラ
ム黒鉛ブロックを配置してなる炉心と、上記炉容器の上
部に設けられた複数本のスタンドパイプと、これらのス
タンドパイプ内に収納され前記制御棒挿入孔と制御棒案
内管を介して接続される制御棒駆動装置とを有する高温
ガス炉において、前記制御棒カラム黒鉛ブロックの上部
に配置される制御棒カラム上部中性子遮蔽体と前記燃料
カラム黒鉛ブロックの上部に配置される燃料カラム上部
中性子遮蔽体との間にテーパ部を有する段差部を形成す
ると共に上記段差部によって形成される凹部に嵌合する
嵌合部材を前記制御棒案内管の下部に設け、かつ前記制
御棒案内管の上端部を上下方向および水平方向に移動自
在に支持したことを特徴とする高温ガス炉。A reactor vessel, a reactor core including a plurality of fuel column graphite blocks arranged around a control rod column graphite block housed in the reactor vessel and having a control rod insertion hole, and a plurality of fuel column graphite blocks provided in the upper part of the reactor vessel. In a high-temperature gas reactor having two standpipes and a control rod drive device housed in these standpipes and connected to the control rod insertion hole and the control rod guide tube, the upper part of the control rod column graphite block A step portion having a tapered portion is formed between the control rod column upper neutron shield disposed in the control rod column and the fuel column upper neutron shield disposed above the fuel column graphite block, and the step portion is formed by the step portion. A high-temperature gas reactor characterized in that a fitting member that fits into the recess is provided at the lower part of the control rod guide tube, and the upper end of the control rod guide tube is supported so as to be movable in the vertical and horizontal directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1263964A JP2856457B2 (en) | 1989-10-12 | 1989-10-12 | High temperature gas furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1263964A JP2856457B2 (en) | 1989-10-12 | 1989-10-12 | High temperature gas furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03125996A true JPH03125996A (en) | 1991-05-29 |
| JP2856457B2 JP2856457B2 (en) | 1999-02-10 |
Family
ID=17396682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1263964A Expired - Fee Related JP2856457B2 (en) | 1989-10-12 | 1989-10-12 | High temperature gas furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2856457B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456374B (en) * | 2013-09-03 | 2015-09-30 | 清华大学 | The reactive control method of pebble bed high temperature reactor and telescopiform control rod |
-
1989
- 1989-10-12 JP JP1263964A patent/JP2856457B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2856457B2 (en) | 1999-02-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |