Japan Atomic Power Company

The Japan Atomic Power Company Mitoshiro Bldg. 

This report describes the development and activities on fast reactor in Japan for the period of April 1996 - March 1997. During this period, the 30th duty cycle operation has been started in the Experimental Fast Reactor "Joyo". The cause investigation on the sodium leak incident has completed and the safety examination are being performed in the Prototype Fast Breeder Reactor "Monju". The three years design study since FY1994 on the plant optimization of the Demonstration FBR has been completed by the Japan Atomic Power Company (JAPC). 

The Japan Atomic Power Company (JAPC) has conducted for the past several years conceptual design studies of the Demonstration Fast Breeder Reactor (DFBR) in accordance with the basic policy of the Federation of Electric Power Companies (E EPC) and has confirmed the feasibility of top entry loop type reactor. 

Post-analysis of Japanese-American Shielding Program for Experimental Research (JASPER) was continued. The Flux Monitor Experiment and the Special Materials Experiment were evaluated in detail. Analytical results of JASPER were effectively utilized in the Demonstration FBR shielding design review, which was conducted in the joint study of Japan Atomic Power Company (JAPC). 

Apart from the prototype FBR MONJU, much research and development (R D) has already been performed to complete the design of the Demonstration FBR, sponsored by nine Japanese utilities, Electric Power Development Co., Ltd., and the Japan Atomic Power Company (JAPC). The R D included the development of new types of equipment for sodium cooled reactors such as highly reliable electromagnetic pumps and double-walled tube steam generators with leak detection systems for both sodium and water/steam. This new equipment is considered to become more important for the commercialization of sodium cooled reactors, and the 4S is adopting these technologies in its design. 

Japan Atomic Power Company, Tokyo,Japan... 

Tokai Power Plant (166MWe, Magnox type GCR) of the Japan Atomic Power Company (JAPC), the first commercial nuclear power plant in Japan, started its operation in 1966. Since then, construction of commercial nuclear power plants has been promoted in Japan. The number of operating nuclear power plants as of August 1997 is 52 and total capacity is 45.1 GWe. Electricity generation by nuclear power amounts to 34,0 % of all commercial electricity generation in fiscal year 1996. TTius, nuclear power is now an essential power source in Japan. 

Japan Atomic Power Company Ohtemachi Bldg., 6-1, 1-Chome, Ohtemachi Chiyoda-ku, Tokyo 100 Japan... 

This Japan Atomic Power Company s Tokai nuclear power station is situated on the Pacific coast about 70 miles north-east of Tokyo. The station is a single reactor housed in a skirt-supported spherical pressure vessel having a mean diameter of... 

MHI has developed the EU-APWR based on 1538 MW planned for the PS using power station units 3 and 4 for the Japan Atomic Power Company. 

The FBR Engineering Company, established by the above four companies, acted as technical co-ordinator. On behalf of PNC, the overall construction manager, the Japan Atomic Power Company (JAPC) took responsibility for direct management of construction under the supervision of PNC. This allowed the project to benefit from the extensive experience of the Japanese electric power companies, which are joint shareholders in JAPC. 

To date, the core shrouds made of 304 stainless steel were replaced as SCC countermeasure in Tokyo Electric Power Company Fukushima Dai-ichi Nuclear Power Station Unit 1,2,3,5, Chugoku Electric Power Company Shimane Nuclear Power Station Unit 1 and Japan Atomic Power Company Tsuruga Nuclear Power Station Unit 1 [6.45], As well as core shroud, other internal components were replaced because of the reduction of radiation source, removal of the interference structure, and also the replacement of other SCC susceptible components made of 304SS. These were as follows ... 

Currently, the development team led by Mitsubishi Heavy Industries (MHI) consists of Kyoto University, Central Research Institute of Electric Power Industries (CRIEPI), the Japan Atomic Power Company (JAPC), and MHI. 

The compact containment boiling water reactor (CCR) is a modular boiling water reactor (BWR) designed by the Toshiba Corporation with the support of the Japan Atomic Power Company (JAPC). The current CCR design falls into the category of innovative small and medium size reactors, featuring 300MW electrical output per module. 

The Japan Atomic Power Company (JAPC) supports the R D for the CCR. The internal upper entry CRD development is supported under the Innovative and Viable Nuclear Energy Technology Development Project founded by the Agency of Natural Resources and Energy and the Ministry of Economy, Trade and Industry (METI). 

The previous designs of 1000 MW(e) class RMWRs have been developed at the Japan Atomic Energy Research Institute (JAERI) in cooperation with the Japan Atomic Power Company (JAPC) and with technical support from the Japanese light water reactor (LWR) vendors. They are described in detail in [X-3]. 

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