Core Makeup Tank Behavior Observed During the Rosa-AP600 Experiments

Yonomoto, Taisuke; Kondo, Masaya; Kukita, Yutaka; Ghan, L.S.; Schultz, Richard R.

doi:10.13182/nt97-a35380

Cited by 24 publications

(1 citation statement)

References 2 publications

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“…The accumulators also inject relatively cold borated water into the reactor core through direct vessel injection line. ACCs and CMT are connected to the DVI line, and the relatively high accumulator flow temporarily reduces the CMT flow due to back pressure [10,37,38]. The calculated results through RELAP5-MV show that the accumulator injection starts at = 94 sec and the accumulators become empty at around = 440 sec as shown in Figures 20, 21, 22, and 23 [38].…”

Section: Sbloca Analysis and Comparison Of Results Obtained From Relamentioning

confidence: 96%

Simulation and Analysis of Small Break LOCA for AP1000 Using RELAP5-MV and Its Comparison with NOTRUMP Code

Yousif

Zhang

Tian

et al. 2017

Science and Technology of Nuclear Installations

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Many reactor safety simulation codes for nuclear power plants (NPPs) have been developed. However, it is very important to evaluate these codes by testing different accident scenarios in actual plant conditions. In reactor analysis, small break loss of coolant accident (SBLOCA) is an important safety issue. RELAP5-MV Visualized Modularization software is recognized as one of the best estimate transient simulation programs of light water reactors (LWR). RELAP5-MV has new options for improved modeling methods and interactive graphics display. Though the same models incorporated in RELAP5/MOD 4.0 are in RELAP5-MV, the significant difference of the latter is the interface for preparing the input deck. In this paper, RELAP5-MV is applied for the transient analysis of the primary system variation of thermal hydraulics parameters in primary loop under SBLOCA in AP1000 NPP. The upper limit of SBLOCA (10 inches) is simulated in the cold leg of the reactor and the calculations performed up to a transient time of 450,000.0 s. The results obtained from RELAP5-MV are in good agreement with those of NOTRUMP code obtained by Westinghouse when compared under the same conditions. It can be easily inferred that RELAP5-MV, in a similar manner to RELAP5/MOD4.0, is suitable for simulating a SBLOCA scenario.

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