Evaluation of Fast Neutron Inserted to RPV Materials and Management of RPV Lifetime for PWR Power Plant

Abstract:

For the PWR power plant in service, the lifetime of RPV is mainly determined by fast neutron (E>0.1MeV and E>1.0MeV) fluence. A new Low-Leakage Core Loading (LLCL) pattern is considered to prolong the lifetime of RPV to 60 years for Daya Bay nuclear power plant. Fast neutron (E>0.1MeV and E>1.0MeV) flux inserted to Reactor Pressure Vessel (RPV) under LLCL pattern is calculate by MCNP and compared with that under Long-Short Alternating Core Loading (LSACL) pattern. The results show that fast neutron fluence over inner surface of RPV under LLCL pattern decrease 28.50% (E>1.0MeV) and 28.22% (E>0.1MeV) compared with LSACL pattern and it is feasible expand the life of LWR-RPV to 60 years by LLCL pattern.

• Periodical: Advanced Materials Research (Volume 413)
• Pages: 514-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.413.514
• Online since: December 2011
• Authors: Shou Hai Yang, Yi Xue Chen, Ye Hu, Ye Shuai Sun, Guo Ping Quan, Hai Xia Wan, Zhong Min Jin, Sheng Chun Shi, Bo Cao, Dao Gang Lu
• Keywords: 60 Years, Fast Neutron, Low-Leakage Core Loading, LWR, MCNP, Power Plant, PWR, RPV Lifetime

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