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1. 发明专利

JPH07229989A FITTING DEVICE OF CONTROL ROD GUIDE TUBE OF HIGH-TEMPERATURE GAS-COOLED REACTOR 失效
公开(公告)号：JPH07229989A
公开(公告)日：1995-08-29
申请号：JP2136594
申请日：1994-02-18
申请人： JAPAN ATOMIC ENERGY RES INST , TOSHIBA CORP
发明人： ISOZAKI TAKANORI , ITAYA MASAO , FUKAMICHI KENJIRO , MATSUZAKI KAZUHIRO
IPC分类号： G21C7/14
摘要： PURPOSE:To make it possible to position a control rod guide tube correctly and to connect it to an upper neutron shielding body of a control rod column and thereby to make smooth insertion of a control rod possible. CONSTITUTION:In a fitting device of a control rod guide tube of a high- temperature gas-cooled reactor whereby the upper end part of the control rod guide tube 4 of the high-temperature gas-cooled reactor is supported by reactor vessel, while the lower end part of the control rod guide tube 4 is fitted in and fixed to an upper neutron shield 13 of a control rod column in the upper end part of a core 2 through the intermediary of a fit member, a guide pin 20 is provided in downward projection from the central part of the lower end face of the fit member 18, while a guide socket 21 into which the guide pin 20 is inserted is provided in the central part of a fit member supporting surface of the upper neutron shielding body 13.

2. 发明专利

JPH08233969A CONTROL ROD FOR HIGH TEMPERATURE GAS REACTOR 失效
公开(公告)号：JPH08233969A
公开(公告)日：1996-09-13
申请号：JP4078895
申请日：1995-02-28
申请人： JAPAN ATOMIC ENERGY RES INST , TOSHIBA CORP
发明人： ISOZAKI TAKANORI , SAITO YUJI , SUEZONO CHIYOUICHI , KATAGIRI SHIGEO
IPC分类号： G21C7/10
摘要： PURPOSE: To reduce thermal strain or the like of a coated tube and contrive long life of a control rod by mounting a dual cylindrical coated tube of neutron absorption housing on a support plate. CONSTITUTION: An outer tube 107 is threadedly engaged with the lower end of an inner tube 106, and a neutron absorption material 110 is housed in a sectional ring-like space between the outer tube 107 and the inner tube 106. The upper part of the space is closed with an upper cap 108, which is fixed by a fixed screw 109 on the upper part of the inner tube 106. The cap 108 and the outer tube 107 are an engaged part for absorbing thermal expansion of the upper and lower directions of the outer tube 107. At the time of quick insertion of a control rod, each control rod element 100 receives radiation heat of high temperature from a rector core insertion hole and is heated at the high temperature by heat conduction through a coolant. But, since the control rod is constituted by a mechanical means wherein each engaged part is threadedly engaged, the deterioration of quality of the whole of the control rod does not exist and the strength of a welding part need not be considered. In addition, the production of plastic strain can be reduced considerably and the long life of the control rod is possible.

3. 发明专利

JPH08146179A BACK-UP DEVICE FOR HIGH-TEMPERATURE GAS-COOLED REACTOR 失效
公开(公告)号：JPH08146179A
公开(公告)日：1996-06-07
申请号：JP28535994
申请日：1994-11-18
申请人： JAPAN ATOMIC ENERGY RES INST , TOSHIBA CORP
发明人： ISOZAKI TAKANORI , SAITO YUJI , SUEZONO CHIYOUICHI
IPC分类号： G21C9/033
摘要： PURPOSE: To prevent the breakage of a neutron absorber caused by the stroke of a valve element so as to execute a smooth advance and retreat test by providing a protective cylinder for surrounding the valve element in such a manner as to advance and retreat only the valve element at the time of testing the advance and retreat of the valve element. CONSTITUTION: A hopper opening 15 is provided with a valve element sliding part 20 for promoting the advance and retreat of a valve element 17, and a protective cylinder 24 for preventing the breakage of a neutron absorber 15 at the time of testing the advance and retreat of the valve element 17. At the time of an advance and retreat test, the rotating force from a driving mechanism is given to a connecting shaft 18, and the valve element 17 is stroked from the opening position. In the case of an emergency accident such as a failure in inserting a control driving rod in a reactor core, first the valve element 17 is stroked, and when the stroke of the valve element 17 reaches the top dead center, pressing force is applied from the valve element 17 to the projecting piece 25 of the protective cylinder 24. By the above pressing force, both the valve element 17 and the protective cylinder 24 make co-operating stroke to a distance L1 to open the hopper opening 16 so that a neutron absorber 15 is delivered to the reactor core through a guide pipe 13.

4. 发明专利

JPH07229991A RESERVED SHUTDOWN DEVICE FOR HIGH TEMPERATURE GAS-COOLED REACTOR 失效
公开(公告)号：JPH07229991A
公开(公告)日：1995-08-29
申请号：JP2136494
申请日：1994-02-18
申请人： JAPAN ATOMIC ENERGY RES INST , TOSHIBA CORP
发明人： ISOZAKI TAKANORI , SAITO YUJI , IKEDA TATSUMI , KATAGIRI SHIGEO
IPC分类号： G21C9/033
摘要： PURPOSE:To reduce a time for injecting a neutron absorber in a reactor core and improve safety of a nuclear reactor. CONSTITUTION:A reactor vessel 1, a reactor core housed in the reactor vessel 1, a guide tube 13 inserted from upward in arrangement in parallel with a control rod drive mechanism in the reactor core, a hopper 14 housing a neutron absorber 15 in the inside provided upward of the guide tube, an absorber drop opening 16 communicating with a neutron absorber-injection opening formed in the lower part of the hopper 14, a valve body 17 for opening and closing the neutron absorber drop opening 16, and a drive mechanism 19 for actuating the value body 17 through a connecting rod 18 are provided. At least the lower shape of the hopper 14 is formed in a plane polygon in which the arrangement direction of a plurality of control rod insertion holes is long.

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