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      저자 : Kaichao Sun (검색결과 1 건)
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        Preliminary design and assessment of a heat pipe residual heat removal system for the reactor driven subcritical facility

        Wenwen Zhang,Kaichao Sun,Chenglong Wang,Dalin Zhang,Wenxi Tian,Suizheng Qiu,G.H. Su 한국원자력학회 2021 Nuclear Engineering and Technology Vol.53 No.12

        A heat pipe residual heat removal system is proposed to be incorporated into the reactor drivensubcritical (RDS) facility, which has been proposed by MIT Nuclear Reactor Laboratory for testing anddemonstrating the Fluoride-salt-cooled High-temperature Reactor (FHR). It aims to reduce the risk of thesystem operation after the shutdown of the facility. One of the main components of the system is an aircooled heat pipe heat exchanger. The alkali-metal high-temperature heat pipe was designed to meet theoperation temperature and residual heat removal requirement of the facility. The heat pipe modeldeveloped in the previous work was adopted to simulate the designed heat pipe and assess the heattransport capability. 3D numerical simulation of the subcritical facility active zone was performed by thecommercial CFD software STAR CCM þ to investigate the operation characteristics of this proposedsystem. The thermal resistance network of the heat pipe was built and incorporated into the CFD model. The nominal condition, partial loss of air flow accident and partial heat pipe failure accident weresimulated and analyzed. The results show that the residual heat removal system can provide sufficientcooling of the subcritical facility with a remarkable safety margin. The heat pipe can work under therecommended operation temperature range and the heat flux is below all thermal limits. The facilitypeak temperature is also lower than the safety limits

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