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Experimental Study of Condensation Heat Exchanger in PAFS (Passive Auxiliary Feedwater System)
Seok Kim(김석),Byoung-Uhn Bae(배병언),Bok-Deuk Kim(김복득),Kyung Ho Kang(강경호),Byong-Jo Yun(윤병조) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
PAFS (Passive Auxiliary Feedwater System) is a passive cooling system on the secondary system of APR+ (Advanced Power Reactor Plus). It can replace the conventional active cooling system for auxiliary feedwater injection to the steam generator by a passive way, and it cools down the secondary system of the steam generator by heat transfer at the condensation heat exchanger installed in the PCCT (Passive Condensation Cooling Tank). To validate a cooling performance of PAFS, a separate effect test loop has been constructed at KAERI (Korea Atomic Energy Research Institute), which is named PASCAL (PAFS Condensing heat removal Assessment Loop). It simulates a single tube of the horizontal heat exchanger, which is equivalent to 1/240 of the prototype according to a volumetric scaling methodology. In this study, two-phase flow phenomena in a horizontal heat exchanger and PCCT (Passive Condensate Cooling Tank) for the facility were investigated and the cooling capability of the condensation heat exchanger was validated in the steady-state experiment. The experimental results in this study will contribute to validate a thermal hydraulic system analysis code or a CFD code for the multi-phase flow.