Analysis of Relationship Between the Radiation Embrittlement Mechanisms and the Influence of Neutron Flux in Respect of WWER Reactor Pressure Vessel Materials

The features of the radiation embrittlement of materials of support structures for WWER RPV are considered. These features are connected with low irradiation temperature no exceeding90°Cand also with a use of the steels which are usually applied for building of the metal structures and have not a high resistance to the radiation embrittlement. It has been shown that support structure (SS) of WWER-440 of V-179, V-230 types may cause the operation life limit. The experimental data on the standard mechanical properties and fracture toughness are presented for different steels and weld metals in the initial and irradiation conditions. SEM investigation of fracture surface of broken specimens and atomic tomography have been performed.

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On the radiation embrittlement of materials of support structures for WWER RPV. Part 1. Experimental studies

Марголин

Yurchenko

Kostylev

et al. 2019

Vopr. materialoved.

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On the radiation embrittlement of materials of support structures for WWER RPV. Part 2. Analysis of the completed studies

Марголин

Yurchenko

Kostylev

et al. 2019

Vopr. materialoved.

View full text Add to dashboard Cite

The features of the radiation embrittlement of materials of support structures for WWER RPV are considered. These features are connected with low irradiation temperature no exceeding 90oC and also with a use of the steels which are usually applied for building of the metal structures and have not a high resistance to the radiation embrittlement. The model for prediction of material radiation embrittlement as function of the neutron fluence and impurity of Cu and P is proposed. An irradiation temperature effect on the different mechanisms resulting in the material radiation embrittlement is considered: materials hardening due to nucleation of point defects and formation of dislocation loops, copper precipitation and materials non-hardening due to phosphorus segregation.

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Analysis of Relationship Between the Radiation Embrittlement Mechanisms and the Influence of Neutron Flux in Respect of WWER Reactor Pressure Vessel Materials

Cited by 2 publications

References 12 publications

On the radiation embrittlement of materials of support structures for WWER RPV. Part 1. Experimental studies

On the radiation embrittlement of materials of support structures for WWER RPV. Part 1. Experimental studies

On the radiation embrittlement of materials of support structures for WWER RPV. Part 2. Analysis of the completed studies

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