한국원자력학회:학술대회논문집 (Proceedings of the Korean Nuclear Society Conference)
- 한국원자력학회 1996년도 추계학술발표회논문집(1)
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- Pages.283-288
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- 1996
A Numerical Study on the Effect of DVI Nozzle Location on the Thermal Mixing in RVDC
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Kang, Hyung-Seok
(Korea Atomic Energy Research Institute) ;
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Cho, Bong-Hyun
(Korea Atomic Energy Research Institute)
- 발행 : 1996.11.01
초록
Direct safety injection into the reactor vessel downcomer annulus(DVI) is a fundamental feature of the KNGR(Korean Next Generation Reactor) four-train safety injection system. The numerical analysis of thermal mixing of ECC(Emergency Core Cooling) water through DVI with the water in the RVDC(Reactor Vessel Downcomer) annulus has been performed, in order to study the impact of nozzle location on the pressurized thermal shock and safety analysis. The results of this study show that the thermal mixing due to the natural circulation induced by the limiting accident conditions is sufficient to prevent temperature in the RVDC from dropping to the level of concern for PTS. When the DVI nozzle is located right above the cold leg, the temperature distribution at the outlet of flow field is most uniform. The tool used for numerical analysis is CFDS-FLOW3D.
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