AN EXPERIMENTAL STUDY WITH SNUF AND VALIDATION OF THE MARS CODE FOR A DVI LINE BREAK LOCA IN THE APR1400

KEO HYOUNG LEE; BYOUNG UHN BAE; YONG SOO KIM; BYONG JO YUN; JI HAN CHUN; GOON CHERL PARK

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자료유형: 학술저널

저자정보: KEO HYOUNG LEE BYOUNG UHN BAE YONG SOO KIM BYONG JO YUN JI HAN CHUN GOON CHERL PARK

저널정보: 한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제41권 제5호

발행연도: 2009.1

수록면: 691 - 708 (18page)

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In order to analyze thermal hydraulic phenomena during a DVI (Direct Vessel Injection) line break LOCA (Loss-of- Coolant Accident) in the APR1400 (Advanced Power Reactor 1400 MWe), we performed experimental studies with the SNUF (Seoul National University Facility), a reduced-height and reduce-pressure integral test loop with a scaled down APR1400. We performed experiments dealing with eight test cases under varied tests. As a result of the experiment, the primary system pressure, the coolant temperature, and the occurrence time of the downcomer seal clearing were affected significantly by the thermal power in the core and the SI flow rate. The break area played a dominant role in the vent of the steam. For our analytical investigation, we used the MARS code for simulation of the experiments to validate the calculation capability of the code. The results of the analysis showed good and sufficient agreement with the results of the experiment. However, the analysis revealed a weak capability in predicting the bypass flow of the SI water toward the broken DVI line, and it was insufficient to simulate the streamline contraction in the broken side. We, hence, need to improve the MARS code.

#DVI Line Break LOCA #APR1400 #Downcomer Seal Clearing #SNUF #MARS #RHRP Facility #Sensitivity

참고문헌 (17)

참고문헌 신청

/ 1999 / Nuclear Regulatory Commission, RELAP5 Code Manual, Bethesda, MD, USA, 1999

American Nuclear Society / 1979 / Decay Heat Power in Light Water Reactors

B. J. Yun / 2003 / Experimental Observations of the Hydraulic Phenomena in the APR-1400 Downcomer during the DVI Line Break Accident / Korea Nuclear Society Spring Meeting

B. J. Yun / 2004 / Scaling for the ECC bypass phenomena during the LBLOCA reflood phase / Nuclear Engineering and Design 231 : 315 ~ 325

B. U. Bae / 2008 / An Integral Loop Test and MARS Code Analysis for a DVI Line Break LOCA in the APR1400 / Nuclear Engineering and Design 238 : 3336 ~ 3347

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