JPH0523638B2 - - Google Patents
Info
- Publication number
- JPH0523638B2 JPH0523638B2 JP60231310A JP23131085A JPH0523638B2 JP H0523638 B2 JPH0523638 B2 JP H0523638B2 JP 60231310 A JP60231310 A JP 60231310A JP 23131085 A JP23131085 A JP 23131085A JP H0523638 B2 JPH0523638 B2 JP H0523638B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- graphite column
- core
- column
- 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
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は原子炉に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to nuclear reactors.
（従来の技術）
球状燃料を用いたガス冷却炉には、冷却材停止
或いは冷却材喪失などにより炉心冷却機能が失わ
れた時の燃料温度上昇防止、上部反射体支持及び
原子炉を停止させる際の中性子吸収体挿入孔の設
置のため炉内に黒鉛柱を設けた円環状炉心の設計
例がある。この黒鉛柱は複数個の黒鉛ブロツクを
積み重ね、ブロツク間をキー構造によつて支持す
る構造となつている。この構造では地震で水平方
向の力が加わつた場合、或いは黒鉛柱の周囲で球
状燃料の堆積高さが異なることにより水平方向の
荷重が生じた場合、黒鉛柱が撓むため、キー構造
が破損、或いは黒鉛柱が倒壊する恐れがある。ま
た炉心が大きくなつた場合、中央の黒鉛柱だけで
は上部反射体の支持及び原子炉を停止させるため
の中性子吸収体の挿入孔の設置に関し十分ではな
い。(Prior art) Gas-cooled reactors that use spherical fuel have the following functions: to prevent the fuel temperature from rising when the core cooling function is lost due to coolant stoppage or loss, support for the upper reflector, and when shutting down the reactor. There is an example of an annular core design in which a graphite column is installed inside the reactor to install a neutron absorber insertion hole. This graphite column has a structure in which a plurality of graphite blocks are piled up and the blocks are supported by a key structure. In this structure, if a horizontal force is applied due to an earthquake, or if a horizontal load is generated due to the different heights of spherical fuel piled up around the graphite column, the graphite column will bend and the key structure will be damaged. , or the graphite column may collapse. Furthermore, when the reactor core becomes larger, the central graphite column alone is not sufficient to support the upper reflector and install the insertion hole for the neutron absorber to shut down the reactor.
（発明が解決しようとする問題点）
本発明は冷却材による冷却機能が失われた時の
燃料温度上昇を防ぐという円環状炉心の特徴を保
持しつつ黒鉛柱の耐震性の向上、上部反射体の支
持強化、及び炉心の中性子吸収体挿入孔の確保に
より、球状燃料による原子炉の大型化を可能にし
ようとするものである。(Problems to be Solved by the Invention) The present invention maintains the characteristic of an annular core that prevents the fuel temperature from rising when the cooling function of the coolant is lost, while improving the earthquake resistance of the graphite column and The aim is to make it possible to increase the size of the nuclear reactor using spherical fuel by strengthening the support for the reactor and securing the neutron absorber insertion hole in the reactor core.
（問題点を解決するための手段）
第１図は３個の耐震用支持壁を有する炉心の水
平断面を示し、第２図は耐震用支持壁１、黒鉛柱
２側部反射体４及び上部反射体３等から成る炉心
構造を示すものであるが、耐震用支持壁は側部反
射体から黒鉛柱にまで達する黒鉛ブロツクを鉛直
方向に積み重ねて作られる。側部反射体及び黒鉛
柱と黒鉛ブロツク間の結合及び黒鉛ブロツク間相
互の結合はキー構造などの機械的結合によつて行
われる。この耐震用支持壁には側部反射体及び黒
鉛柱と同様に中性子吸収体挿入孔が設けられてい
るなお、５は球状燃料を示す。(Means for solving the problem) Figure 1 shows a horizontal section of a core having three seismic support walls, and Figure 2 shows an earthquake support wall 1, a graphite column 2, a side reflector 4 and an upper part. This figure shows a core structure consisting of reflectors 3, etc., and the seismic support wall is made by vertically stacking graphite blocks that extend from the side reflectors to the graphite columns. The connections between the side reflectors and the graphite columns and the graphite blocks and the connections between the graphite blocks are made by mechanical connections such as key structures. This seismic support wall is provided with a neutron absorber insertion hole similar to the side reflector and graphite column. Note that 5 indicates a spherical fuel.
このように黒鉛柱を中心に放射状に複数個の耐
震用支持壁を設けることにより黒鉛柱を側部から
支えるため、地震などにより水平荷重が作用した
場合にも、黒鉛柱が撓んだり倒壊したりすること
が防止できる。耐震用支持壁は上部反射体の重量
も支えることができるため、大型の炉心の場合に
も耐震用支持壁の設置間隔を適当に選ぶことによ
り、上部反射体の支持を行うことができる。耐震
用支持壁に中性子吸収体挿入孔を設けることによ
り大型の炉心の場合でも炉心に中性子吸収体を挿
入することができ、充分な炉停止余裕を確保する
ことができる。また黒鉛柱及び耐震用支持壁の高
い熱伝導率及び大きな熱容量を利用して炉心冷却
機能喪失時の燃料温度上昇は従来の円環状炉心よ
りさらに有効に防止できる。 In this way, by providing multiple seismic support walls radially around the graphite column, the graphite column is supported from the sides, so even if a horizontal load is applied due to an earthquake, the graphite column will not bend or collapse. It is possible to prevent this from happening. Since the seismic support walls can also support the weight of the upper reflector, even in the case of a large core, the upper reflector can be supported by appropriately selecting the installation interval of the seismic support walls. By providing a neutron absorber insertion hole in the seismic support wall, the neutron absorber can be inserted into the reactor core even in the case of a large reactor core, and sufficient margin for reactor shutdown can be ensured. Furthermore, by utilizing the high thermal conductivity and large heat capacity of the graphite columns and seismic support walls, fuel temperature rise when the core cooling function is lost can be more effectively prevented than with conventional annular cores.
第１図は原子炉の断面図である。第２図は耐震
用支持壁、黒鉛柱及び反射体等の相互関係を示す
見取り図である。
図において、１は耐震用支持壁、２は黒鉛柱、
３は上部反射体、４は側部反射体、５は球状燃
料、６は中性子吸収体挿入孔である。
FIG. 1 is a cross-sectional view of the nuclear reactor. FIG. 2 is a sketch showing the mutual relationships among the earthquake-resistant support walls, graphite columns, reflectors, etc. In the figure, 1 is an earthquake-resistant support wall, 2 is a graphite column,
3 is an upper reflector, 4 is a side reflector, 5 is a spherical fuel, and 6 is a neutron absorber insertion hole.
Claims (1)
部の黒鉛柱にまで達する複数個の耐震用支持壁を
設けて黒鉛柱を支持し、また上部反射体を該耐震
用支持壁の上部及び黒鉛柱頭部に固定することに
より上部反射体の支持を強化し、さらに該耐震用
支持壁に中性子吸収体挿入孔が設けられた原子
炉。1. A plurality of seismic support walls extending from the side reflectors through the spherical fuel area to the graphite column in the center of the core are provided to support the graphite column, and the upper reflector is connected to the top of the seismic support walls and the graphite column. A nuclear reactor in which support for an upper reflector is strengthened by fixing it to a column head, and a neutron absorber insertion hole is provided in the seismic support wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60231310A JPS6291894A (en) | 1985-10-18 | 1985-10-18 | Nuclear reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60231310A JPS6291894A (en) | 1985-10-18 | 1985-10-18 | Nuclear reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6291894A JPS6291894A (en) | 1987-04-27 |
| JPH0523638B2 true JPH0523638B2 (en) | 1993-04-05 |
Family
ID=16921620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60231310A Granted JPS6291894A (en) | 1985-10-18 | 1985-10-18 | Nuclear reactor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6291894A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009036606A (en) * | 2007-08-01 | 2009-02-19 | Mitsubishi Heavy Ind Ltd | Nuclear reactor |
-
1985
- 1985-10-18 JP JP60231310A patent/JPS6291894A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6291894A (en) | 1987-04-27 |
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