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Hidaka, Akihide; Maruyama, Yu; Nakamura, Hideo
Proceedings of 6th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operations and Safety (NUTHOS-6) (CD-ROM), 15 Pages, 2004/00
Severe accident studies showed that Direct Containment Heating issue was resolved for PWRs because a creep rupture at pressurizer surge line would occur prior to the melt-through of Reactor Pressure Vessel during station blackout (TMLB'). However, it was recently concerned that, if the secondary system is depressurized during TMLB', the creep rupture at SG U-tubes would occur earlier than the surge line. This pressure- and temperature-induced SG U-tube rupture (PTI-SGTR) is not preferable because of the increase in offsite consequences. The SCDAP/RELAP5 analyses by USNRC showed that the surge line would fail earlier than the U-tubes. However, the analyses used a coarse nodilization for steam mixing at the SG inlet plenum that could affect the temperature of U-tubes. To investigate the effect of steam mixing, an analysis was performed with MELCOR1.8.4. The analysis showed that the surge line would fail earliest during TMLB' while the U-tubes could fail earliest during TMLB' with secondary system depressurization. Further investigation is needed for occurrence conditions of PTI-SGTR.
Seul, K. W.*; Yonomoto, Taisuke; Bang, Y. S.*; Anoda, Yoshinari
Proceedings of 6th Biennial Conference on Engineering Systems Design and Analysis (ESDA2002), 9 Pages, 2002/07
no abstracts in English
H.Yang*; Hidaka, Akihide; Sugimoto, Jun
JAERI-Tech 99-013, 97 Pages, 1999/03
no abstracts in English
Watanabe, Norio; Hirano, Masashi;
Proc. of Int. Topical Meeting on Probabilistic Safety Assessment (PSA'99), 1, p.717 - 724, 1999/00
no abstracts in English
Watanabe, Norio
Reliab. Eng. Syst. Saf., 57, p.281 - 297, 1997/00
Times Cited Count：6 Percentile：40.05(Engineering, Industrial)no abstracts in English
Anoda, Yoshinari; Nakamura, Hideo; Watanabe, Tadashi; Hirano, Masashi; Kukita, Yutaka
Int. Conf. on New Trends in Nuclear System Thermohydraulics,Vol. 1, 0, p.539 - 545, 1994/00
no abstracts in English
; Watanabe, Tadashi; Kukita, Yutaka
JAERI-M 93-236, 34 Pages, 1993/12
no abstracts in English
Ishigami, Tsutomu; Kobayashi, Kensuke
Nihon Genshiryoku Gakkai-Shi, 35(6), p.549 - 560, 1993/06
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)no abstracts in English
Watanabe, Tadashi; M.Wang*; Kukita, Yutaka
JAERI-M 93-039, 26 Pages, 1993/03
no abstracts in English
Anoda, Yoshinari; Nakamura, Hideo; Watanabe, Tadashi; Hirano, Masashi; Kukita, Yutaka
Proc. of the 1993 Simulation Multiconference on the Int. Simulators Conf. ; SIMULATORS X, p.242 - 247, 1993/00
no abstracts in English
Fujiki, Kazuo; Ishigami, Tsutomu;
Proc. OECD/CSNI-CEC Specialist Meeting Trend and Pattern Analyses of Operational Data from NPP, p.407 - 418, 1990/00
no abstracts in English
Soda, Kunihisa; Ishigami, Tsutomu; Hidaka, Akihide; Abe, Kiyoharu
NEA/CSNI(1989)158, p.299 - 308, 1989/06
no abstracts in English
; ; ; Fujiki, Kazuo; Kosaka, Atsuo;
Tech. Rep. Inst. At. Energy,Kyoto Univ., 211, p.1 - 57, 1989/05
no abstracts in English
