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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제48권 제6호
발행연도
2016.1
수록면
1,321 - 1,329 (9page)

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초록· 키워드

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To get an insight into the operating characteristics of the passive residual heat removalsystem of molten salt reactors, a two-phase natural circulation test facility was constructed. The system consists of a boiling loop absorbing the heat from the drain tank, acondensing loop consuming the heat, and a steam drum. A steady-state experiment wascarried out, in which the thimble temperature ranged from 450 C to 700 C and the systempressure was controlled at levels below 150 kPa. When reaching a steady state, the systemwas operated under saturated conditions. Some important parameters, including heatpower, system resistance, and water level in the steam drum and water tank wereinvestigated. The experimental results showed that the natural circulation system isfeasible in removing the decay heat, even though some fluctuations may occur in theoperation. The uneven temperature distribution in the water tank may be inevitablebecause convection occurs on the outside of the condensing tube besides boiling withdecreasing the decay power. The instabilities in the natural circulation loop are sensitive toheat flux and system resistance rather than the water level in the steam drum and watertank. RELAP5 code shows reasonable results compared with experimental data.

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