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Journal Articles

Start up core physics tests of High Temperature Engineering Test Reactor (HTTR), 2; First criticality by an annular form fuel loading and its criticality prediction method

Fujimoto, Nozomu; Nakano, Masaaki*; Takeuchi, Mitsuo; Fujisaki, Shingo; Yamashita, Kiyonobu

Nihon Genshiryoku Gakkai-Shi, 42(5), p.458 - 464, 2000/05

 Times Cited Count:6 Percentile:43.58(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Startup core physics tests of High Temperature Engineering Test Reactor (HTTR), 1; Test plan, fuel loading and nuclear characteristics tests

Yamashita, Kiyonobu; Fujimoto, Nozomu; Takeuchi, Mitsuo; Fujisaki, Shingo; Nakano, Masaaki*; Umeta, Masayuki; Takeda, Takeshi; Mogi, Haruyoshi; Tanaka, Toshiyuki

Nihon Genshiryoku Gakkai-Shi, 42(1), p.30 - 42, 2000/01

 Times Cited Count:3 Percentile:27.02(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Present status of the High Temperature engineering Test Reactor(HTTR)

Tanaka, Toshiyuki; Shiozawa, Shusaku; Okubo, Minoru; Fujikawa, Seigo; Mogi, Haruyoshi; Suzuki, Hiroshi

Proceedings of European Nuclear Conference (ENC'98), 4, 5 Pages, 1998/00

no abstracts in English

Journal Articles

Evaluation of the high temperature engineering test reactor's first criticality with Monte Carlo code

Yamashita, Kiyonobu; Ando, Hiroei; Nojiri, Naoki; Fujimoto, Nozomu; Nakata, Tetsuo*; Watanabe, Takashi*; Yamane, Tsuyoshi; Nakano, Masaaki*

Proc. of SARATOGA 1997, 2, p.1557 - 1566, 1997/00

no abstracts in English

Oral presentation

Development of criticality risk evaluation method for fuel debris in Fukushima-Daiichi NPS

Yamane, Yuichi; Tonoike, Kotaro

no journal, , 

After the accident of Fukushima Dai-ichi Nuclear Power Station, there is still damaged nuclear fuel in the reactor buildings, which is called fuel debris and contains an amount of fissile materials more than the minimum criticality amount. A new method, which has been developed by Japan Atomic Energy Agency to technically support the Nuclear Regulatory Authority in Japan, NRA, is designed to estimate criticality risk based on a probability distribution of k-eff due to uncertainty of composition and geometry of fuel debris, which method will provide risk information for the criticality safety of fuel debris. A trial analysis by using the procedure defined in the method shows that some events which can initiate criticality can be supposed to happen during maintenance period, and that analysis also indicates countermeasures should be considered as soon as possible in order to reduce criticality risk for public and workers.

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