Analysis of In-vessel Core Catcher Influencing on Neutron Irradiation of Pressure Vessel

XU Hong; YIN Zhi-tao; GANG Zhi; ZHOU Zhi-wei

doi:10.7538/yzk.2013.47.zk.0234

Atomic Energy Science and Technology > 2013 > 47(增刊): 234-238. > DOI: 10.7538/yzk.2013.47.zk.0234

XU Hong, YIN Zhi-tao, GANG Zhi, ZHOU Zhi-wei. Analysis of In-vessel Core Catcher Influencing on Neutron Irradiation of Pressure Vessel[J]. Atomic Energy Science and Technology, 2013, 47(增刊): 234-238. DOI: 10.7538/yzk.2013.47.zk.0234

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Analysis of In-vessel Core Catcher Influencing on Neutron Irradiation of Pressure Vessel

1.
State Nuclear Power Technology R & D Center, Beijing 100190, China
2.
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

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The strategy of in-vessel core catcher (IVCC) can be applied to achieve in-vessel retention on the condition of serious accident in pressured water reactor (PWR). The IVCC is a part of reactor pressure vessel (RPV) and it can’t be replaced in life span of nuclear power plant. In addition, it endured neutron irradiation in long-term. The typical PWR RPV model and IVCC model were studied. The results show that IVCC don’t change fast neutron flux in pressure vessel, and it don’t influence the RPV irradiation result. Furthermore, the thermal neutron flux of pressure vessel obviously reduces, and the total irradiation level of pressure vessel reduces. The IVCC can’t make against irradiation performance of the RPV, and it is useful for avoiding aging of RPV adversely.
- pressure vessel,
- in-vessel core catcher,
- neutron irradiation,
- MCNP

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Analysis of In-vessel Core Catcher Influencing on Neutron Irradiation of Pressure Vessel

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