Study on High-temperature Creep for Lower Head of HPR1000 Reactor Pressure Vessel

Yang Licai; Qiu Tian; Yang Zhihai; Yin Qiwei

doi:10.13832/j.jnpe.2022.S2.0202

Volume 43 Issue S2

Dec. 2022

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Yang Licai, Qiu Tian, Yang Zhihai, Yin Qiwei. Study on High-temperature Creep for Lower Head of HPR1000 Reactor Pressure Vessel[J]. Nuclear Power Engineering, 2022, 43(S2): 202-207. doi: 10.13832/j.jnpe.2022.S2.0202

Citation:

Yang Licai, Qiu Tian, Yang Zhihai, Yin Qiwei. Study on High-temperature Creep for Lower Head of HPR1000 Reactor Pressure Vessel[J]. Nuclear Power Engineering, 2022, 43(S2): 202-207. doi: 10.13832/j.jnpe.2022.S2.0202

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Study on High-temperature Creep for Lower Head of HPR1000 Reactor Pressure Vessel

doi: 10.13832/j.jnpe.2022.S2.0202

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2022-07-22
Rev Recd Date: 2022-10-16
Publish Date: 2022-12-31

Abstract

Abstract

High-temperature creep is main failure mode of HPR1000 RPV lower dome under severe accident. To accurately study high-temperature creep of HPR1000 RPV lower dome made of domestic 16MND5 forging and assure structure integrity of RPV lower dome under severe accident, high-temperature creep of HPR1000 RPV lower dome is studied systematically in this paper by combining numerical simulation and theoretical analysis based on the high-temperature creep test data. Firstly, the constitutive model of RPV lower dome material is established. Adopting ANSYS software, the numerical simulation of the high-temperature creep of the lower dome under the action of high temperature and internal pressure is performed, and creep strain and stress distributions for lower dome are obtained. Furthermore, the high-temperature creep problem of RPV lower dome is theoretically studied for the first time. The research results indicate, high-temperature creep of RPV lower dome mainly occurs in the zone whose temperature is higher than 450℃; Under severe accident, HPR1000 RPV doesn’t fail due to high-temperature creep ; Plasticity failure zone will enlarge with the increase of internal pressure; The theoretical analysis results of steady creep are consistent with the numerical simulation ones, and deeply reveal the layered failure phenomenon of RPV lower dome.
- Reactor pressure vessel (RPV),
- Lower head,
- High-temperature creep,
- Numerical simulation,
- Theoretical research

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References(15)

References

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