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학술저널
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한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제46권 제6호
발행연도
2014.1
수록면
797 - 803 (7page)

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This study investigated the thermal hydraulic issues in the Containment Filtered Venting System (CFVS) for a longoperating time using the MELCOR computer code. The modeling of the CFVS, including the models for pool scrubbingand the filter, was added to the input file for the OPR-1000, and a Station Blackout (SBO) was chosen as an accidentscenario. Although depressurization in the containment building as a primary objective of the CFVS was successful, thedecontamination feature by scrubbing and filtering in the CFVS for a long operating time could fail by the continuousevaporation of the scrubbing solution. After the operation of the CFVS, the atmosphere temperature in the CFVS becameslightly above the water saturation temperature owing to the release of an amount of steam with high temperature fromthe containment building to the scrubbing solution. Reduced pipe diameters at the inlet and outlet of the CFVS vesselmitigated the evaporation of scrubbing water by controlling the amount of high-temperature steam and the water saturationtemperature.

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