Prediction of RPV Irradiation Embrittlement Performance and Life Evaluation of Extended Operation in a Nuclear Power Plant

Fang Yonggang; Tong Zhenfeng; Chu Qibao; Zeng Zhen; Shen Yingcai

doi:10.13832/j.jnpe.2023.04.0192

Volume 44 Issue 4

Aug. 2023

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Fang Yonggang, Tong Zhenfeng, Chu Qibao, Zeng Zhen, Shen Yingcai. Prediction of RPV Irradiation Embrittlement Performance and Life Evaluation of Extended Operation in a Nuclear Power Plant[J]. Nuclear Power Engineering, 2023, 44(4): 192-197. doi: 10.13832/j.jnpe.2023.04.0192

Citation:

Fang Yonggang, Tong Zhenfeng, Chu Qibao, Zeng Zhen, Shen Yingcai. Prediction of RPV Irradiation Embrittlement Performance and Life Evaluation of Extended Operation in a Nuclear Power Plant[J]. Nuclear Power Engineering, 2023, 44(4): 192-197. doi: 10.13832/j.jnpe.2023.04.0192

Citation:

Fang Yonggang, Tong Zhenfeng, Chu Qibao, Zeng Zhen, Shen Yingcai. Prediction of RPV Irradiation Embrittlement Performance and Life Evaluation of Extended Operation in a Nuclear Power Plant[J]. Nuclear Power Engineering, 2023, 44(4): 192-197. doi: 10.13832/j.jnpe.2023.04.0192

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Prediction of RPV Irradiation Embrittlement Performance and Life Evaluation of Extended Operation in a Nuclear Power Plant

doi: 10.13832/j.jnpe.2023.04.0192

1.
Nuclear and Radiation Safety Center, MEE, Beijing, 100082, China
2.
North China Electric Power University, Beijing, 102206, China

Received Date: 2022-11-21
Rev Recd Date: 2023-05-08
Publish Date: 2023-08-15

Abstract

Abstract

A domestic self-designed and built nuclear power plant has entered the stage of extended operation. A foreign prediction model was adopted for the irradiation embrittlement evaluation of the reactor pressure vessel, however, the irradiation data on which the foreign prediction model was based cannot effectively represent the irradiation embrittlement performance of domestic RPV materials, especially for the extended operation stage. Based on the radiation embrittlement prediction models of RPV at home and abroad and their development mechanisms, an independent low-Cu RPV radiation embrittlement prediction model suitable for domestic engineering applications has been formed, which considers the key factors of irradiation embrittlement such as stable matrix defects and alloy element precipitation. According to the irradiation embrittlement data of domestic low-Cu RPV materials, the standard deviation and margin analysis of the independent model were carried out, and the results indicated a high level of confidence in prediction. Based on the model, the irradiation performance of the RPV was evaluated, and the feasibility of extended operation to 60 equivalent full power years (EFPY) was demonstrated.
- Reactor pressure vessel,
- Irradiation embrittlement,
- Prediction model,
- Extended operation

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References(12)

References

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