Method and device for evaluating degree of neutron irradiation embrittlement of nuclear power plant reactor pressure vessel

• Main Authors: Xiaobing Ran, Jun Chen, Guogang Shu, Xiaoyun Deng, Chengliang Li, Wei Liu, Ben Xu, Feihua Liu, Yuangang Duan
• Format: Patent
• Language: English
• Published: 21.10.2020
• Subjects: NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS

A method and device for evaluating the degree of neutron irradiation embrittlement of a nuclear power plant reactor pressure vessel. The initial electrical resistivity of the steel of a reactor pressure vessel is measured and the electrical resistivity of the steel of the reactor pressure vessel of any arbitrary point in time after being embrittled by neutron irradiation is acquired in real-time to calculate the macroscopic mechanical properties and/or neutron irradiation fluence; and, the degree of irradiation embrittlement of the reactor pressure vessel is analyzed and evaluated on the basis of the macroscopic mechanical properties and/or neutron irradiation fluence. The method and device are economical, environmentally friendly, safe, and highly efficient, allow real-time monitoring of the degree of irradiation embrittlement of a specific part of the reactor pressure vessel, and allow simultaneous monitoring of the degree of irradiation embrittlement of multiple parts of the reactor pressure vessel.