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Watanabe, Norio
JAERI-M 94-076, 97 Pages, 1994/06
no abstracts in English
Watanabe, Norio; Hirano, Masashi
Journal of Nuclear Science and Technology, 29(12), p.1212 - 1223, 1992/12
no abstracts in English
Watanabe, Norio; Hirano, Masashi;
JAERI-M 91-143, 173 Pages, 1991/09
no abstracts in English
Okano, Yasushi; Yamano, Hidemasa
no journal, ,
There has been an increased concern in the safety of NPP for external hazards, one of which is a forest fire. Conventional forest fire assessments have been performed with deterministic and conservative manner, using so-called envelope initial and boundary conditions on forest fire analyses. In this study, the forest fire hazard assessment methodology, which is subject to an external-hazard probabilistic risk assessment (PRA), is being developed in order to quantitatively evaluate frequency and consequence of the forest fire that has a potential impact on a NPP and then to obtain the Core Damage Frequency. The new methodology based on a logic tree is developed in this study, as well as the sensibility analyses on weather conditions.
Kurisaka, Kenichi; Yamano, Hidemasa; Nishino, Hiroyuki
no journal, ,
This study aims at developing the probabilistic risk assessment methodology of decay heat removal function in sodium-cooled fast reactor systems against wind hazard. For this purpose, wind hazard curve was evaluated; event trees were developed to identify the strong wind induced core damage sequence; core damage frequency was quantified, and dominant sequence was evaluated.
Fukano, Yoshitaka
no journal, ,
no abstracts in English
Mori, Takero; Ohira, Hiroaki; Sotsu, Masutake; Fukano, Yoshitaka
no journal, ,
In order to evaluate the availability of the decay heat removal by natural circulation which is a measure for the Protected Loss of Heat Sink (PLOHS) in Fast Reactor, a whole core model which could simulate thermal hydraulics of each subassembly in a reactor was applied to Monju core. The Monju core model was validated by a test result of actual plant, MONJU. In addition, an analysis was conducted for PLOHS to investigate the applicability of this model.
