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11. 发明专利

JPH05232272A BOILING WATER TYPE NUCLEAR REACTOR 失效
公开(公告)号：JPH05232272A
公开(公告)日：1993-09-07
申请号：JP3340792
申请日：1992-02-20
申请人： TOSHIBA CORP
发明人： NARABAYASHI SUNAO , SAITO NOBORU , ISHITORI TAKASHI , SHIMANO KUNIO , AIDA YASUHIKO , HATTORI YASUSHI , YAMADA KATSUMI , TANAKA NOBUHIKO , NAKAMURA AKIRA , MIYANO HIROSHI , SUMIYAMA SHIGEAKI , OSHIMA IWAO , KOMITA HIDEO , FUJII TAKAO , OZAKI OSAMU , MOTAI KATSUHIKO
IPC分类号： G21C1/08 , G21C5/00 , G21C5/02 , G21C7/117 , G21C7/12 , G21C7/16 , G21C15/25 , G21C17/00
摘要： PURPOSE:To obtain a 'nuclear reactor gentle for men' by improving maintenance and operability to reduce burden on periodical inspection workers and operators significantly. CONSTITUTION:A core 21 is arranged at a lower part in a pressure vessel 20 of a nuclear reactor. The core 21 is so formed to hold a core support plate and an upper grill plate 27 and a fuel assembly 22 is wrapped entirely with a shroud 24. A long-sized cylindrical separator 29 is provided on a shroud head 25 at the upper art of the shroud 24 through a stand pipe 28. An upper control rod drive mechanism 33 is provided above the separator 29 through a control rod drive mechanism anchor base 31. A jet pump 36 is disposed between the pressure vessel 20 of the reactor and the shroud 24. The jet pump 36 is connected to a water supply pipe 37 for supplying a coolant.

12. 发明专利

JPH02102496A METHOD FOR OPERATING GRAVITY CIRCULATION BOILING WATER REACTOR 失效
公开(公告)号：JPH02102496A
公开(公告)日：1990-04-16
申请号：JP25480488
申请日：1988-10-12
申请人： NIPPON ATOMIC IND GROUP CO , TOSHIBA CORP
发明人： SUMIYAMA SHIGEAKI , YOSHIDA HIROYUKI
IPC分类号： G21D3/08
摘要： PURPOSE:To allow the extension of combustion time and to improve fuel economy by operating the reactor under the in-pile pressure lower than the rated pressure in the initial period of operation cycles and operating the reactor under the pressure higher than the rated pressure in the end period of the operation cycles. CONSTITUTION:Since the reactor is operated under the in-pile pressure lower than the rated pressure in the initial period of the operation cycles, a void rate from the top end to the lower part of a fuel assembly is increased. As a result, the formation reaction of plutonium is accelerated in the region from the top end of the fuel assembly to the lower part and the plutonium is accumulated in this region. The reactor is operated under the pressure higher than the rated pressure in the end period of the operation cycles and, therefore, the generation of air bubbles is suppressed and the void rate of the reactor core is decreased. The output distribution has consequently a high top peak in the upper part of the reactor core and the accumulated plutonium is efficiently burned in the initial period of the operation cycles. The combustion time is, therefore, extended by as much as the burned component thereof and the fuel economy is improved.

13. 发明专利

JP2000120404A COMBINED POWER GENERATING PLANT 失效
公开(公告)号：JP2000120404A
公开(公告)日：2000-04-25
申请号：JP29192998
申请日：1998-10-14
申请人： TOSHIBA CORP
发明人： ITO ARATA , KATAOKA KAZUYOSHI , HIRONO HIDEJI , SUMIYAMA SHIGEAKI
IPC分类号： G21D5/00 , F01K21/04 , F01K23/10 , F01K25/06 , F01K25/10 , F02C6/00 , F02C6/14
摘要： PROBLEM TO BE SOLVED: To suppress discharge of carbon dioxide by using electric power and thermal energy of nuclear power generation during night to produce and reserve fuel for peak power generating fuel in the daytime, and by burning this fuel for power generation in the daytime. SOLUTION: A mixed medium power generator 30 is connected to a nuclear power generating system 1. The system 1 is connected on an exhaust gas side of a steam turbine 5 thereof to a suction type refrigerator 2. The refrigerator 2 is connected to a low-temperature type liquefying device 21. The liquefying device 21 is connected to a storage cryogenic converter 4. The converter 4 is connected to a combustor 11 of a methanol gas turbine combined power generating system 26. During a peak demand for power generation in the daytime, reserved methanol, oxygen and carbon dioxide generate combustion gas to drive a gas turbine 12. The resultant waste heat generates steam, thereby driving a steam turbine 14. The waste heat of the steam turbine 14 generates ammonia vapor for a mixed liquid cycle to drive a mixed medium turbine, thereby achieving power generation in accordance with the peak demand for power. Carbon dioxide generated by methanol combustion is liquefied to be reserved.

14. 发明专利

JPH03154896A DIAGNOSTIC SYSTEM FOR ABNORMALITY OF RECIRCULATION PUMP OF NUCLEAR REACTOR 失效
公开(公告)号：JPH03154896A
公开(公告)日：1991-07-02
申请号：JP29437389
申请日：1989-11-13
申请人： TOSHIBA CORP
发明人： TAKAGI AKIO , SUMIYAMA SHIGEAKI
IPC分类号： G21C17/003 , G21C17/00
摘要： PURPOSE:To take a proper diagnosis objectively by estimating an abnormality occurrence position of a recirculation pump by a neural network which inputs the intensity of vibration in each specific frequency band. CONSTITUTION:The neutral network 1 consists of, for example, an input layer 2, an output layer 3, and a hidden layer 4 between those, and an input signal Xn corresponding to the syndrome vector Xi of the recirculation pump of the nuclear reactor is inputted to respective units of the input layer 2. The input signal Xn represents the intensity (amplitude) of vibration of the recirculation pump in each aimed frequency band corresponding to the syndrome vector Xi, the vibration of the recirculation pump is measured for a certain time, and the measurement result is processed by fast Fourier transform, etc., to obtain a spectrum, thereby generating the input signal according to the spectrum. Consequently, a subjective judgement is eliminated and the objective diagnosis becomes possible.

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