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Journal Articles

ROSA/LSTF test on nitrogen gas behavior during reflux condensation in PWR and RELAP5 code analyses

Takeda, Takeshi; Otsu, Iwao

Mechanical Engineering Journal (Internet), 5(4), p.18-00077_1 - 18-00077_14, 2018/08

JAEA Reports

Analysis on non uniform flow in steam generator during steady state natural circulation cooling

Susyadi; Yonomoto, Taisuke

JAERI-Research 2005-011, 64 Pages, 2005/06

JAERI-Research-2005-011.pdf:2.57MB

Steady-state natural circulation (NC) in the PWR was investigated focusing on non uniform flow among steam generator (SG) U-tubes observed in the ROSA/LSTF experiments. In the analysis using the RELAP5/MOD3 code, the SG behavior was analyzed using the partial SG model with one, five, or nine parallel flow paths in the primary side and boundary conditions based on the experiments. The results showed that simulations using the model with five or nine tubes were capable to capture important non uniform phenomena such as reverse flow, fill and dump and stagnant vertical stratification, and the stable SG outlet flow as observed in the experiments. Heat transfer rates to the secondary side were, however, underpredicted by up to 15%. Furthermore, difficulties were found in establishing the steady state condition especially for the low pressure analysis: only when the inlet flow rate was carefully imposed, stable NC behavior was obtained.

Journal Articles

Nonuniform flow behavior among SG U-tubes occurringduring a low-pressure two-phase natural circulation phase in a PWR

Yonomoto, Taisuke; Anoda, Yoshinari

Nihon Kikai Gakkai Dai-6-Kai Doryoku, Enerugi Gijutsu Shimpojiumu '98 Koen Rombunshu, p.198 - 203, 1998/00

no abstracts in English

Journal Articles

Numerical analysis of mixed convective heat transfer in a square channel uniform wall temperature

Kunugi, Tomoaki; *; *

Nihon Kikai Gakkai Rombunshu, B, 60(572), p.1393 - 1400, 1994/04

no abstracts in English

Journal Articles

Effects of three dimensional flow separation due to non-uniform heating on laminar mixed convection in a square channel

Kunugi, Tomoaki; *; *

Proc. of 10th Int. Heat Transfer Conf., 0, p.501 - 506, 1994/00

no abstracts in English

Journal Articles

Experimental study of the critical heat flux in a narrow vertical rectangular channel

Kaminaga, Masanori; Sudo, Yukio; Murayama, Yoji; *

Heat Transfer-Jpn. Res., 20(1), p.72 - 85, 1991/03

no abstracts in English

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