M. Kolluri , H.H.S.P. Bregman , F.J. Frith , O. Martin , V. Petrosyan , A. Petrosyan , G. Sevikyan
{"title":"高通量辐照对 VVER-440 RPV 监视试样参考温度的影响","authors":"M. Kolluri , H.H.S.P. Bregman , F.J. Frith , O. Martin , V. Petrosyan , A. Petrosyan , G. Sevikyan","doi":"10.1016/j.jnucmat.2024.155256","DOIUrl":null,"url":null,"abstract":"<div><p>Master curve (MC) testing of VVER-440 RPV surveillance specimens treated for 27 years (∼200,000 h) in a surveillance channel of Metsamor-NPP was performed to investigate the influence of long term high fluence irradiation on RPV embrittlement. The surveillance chain consisted of both thermal aged specimens (above the core level) and irradiated specimens (inside the core). The reference temperature (<em>T<sub>o</sub></em>) values obtained from irradiated specimens are compared with the results from thermal aged specimens to characterize irradiation induced shifts in <em>T<sub>o</sub></em> values for both base and weld metal specimens. It was found that the high fluence irradiation up to a nominal fluence of 3.2 × 10<sup>25</sup> n.m<sup>-2</sup> at <em>E</em> > 0.5 MeV resulted large embrittlement with <em>T<sub>o</sub></em> shift values greater than 300 °C for both base and weld metal specimens. The obtained shifts in <em>T<sub>o</sub></em> values at these high fluence values were used to compare with the predictions from PNAE procedure in the Russian regulatory guide outside its validity range. It was found that the measured shift in reference temperature for the weld metal was well below the predicted value while, the shift in reference temperature for base metal was largely under-predicted at these high fluence values.</p></div>","PeriodicalId":373,"journal":{"name":"Journal of Nuclear Materials","volume":null,"pages":null},"PeriodicalIF":2.8000,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Influence of high fluence irradiation on reference temperature of VVER-440 RPV surveillance specimens\",\"authors\":\"M. Kolluri , H.H.S.P. Bregman , F.J. Frith , O. Martin , V. Petrosyan , A. Petrosyan , G. Sevikyan\",\"doi\":\"10.1016/j.jnucmat.2024.155256\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Master curve (MC) testing of VVER-440 RPV surveillance specimens treated for 27 years (∼200,000 h) in a surveillance channel of Metsamor-NPP was performed to investigate the influence of long term high fluence irradiation on RPV embrittlement. The surveillance chain consisted of both thermal aged specimens (above the core level) and irradiated specimens (inside the core). The reference temperature (<em>T<sub>o</sub></em>) values obtained from irradiated specimens are compared with the results from thermal aged specimens to characterize irradiation induced shifts in <em>T<sub>o</sub></em> values for both base and weld metal specimens. It was found that the high fluence irradiation up to a nominal fluence of 3.2 × 10<sup>25</sup> n.m<sup>-2</sup> at <em>E</em> > 0.5 MeV resulted large embrittlement with <em>T<sub>o</sub></em> shift values greater than 300 °C for both base and weld metal specimens. The obtained shifts in <em>T<sub>o</sub></em> values at these high fluence values were used to compare with the predictions from PNAE procedure in the Russian regulatory guide outside its validity range. It was found that the measured shift in reference temperature for the weld metal was well below the predicted value while, the shift in reference temperature for base metal was largely under-predicted at these high fluence values.</p></div>\",\"PeriodicalId\":373,\"journal\":{\"name\":\"Journal of Nuclear Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-06-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Nuclear Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022311524003581\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Nuclear Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022311524003581","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Influence of high fluence irradiation on reference temperature of VVER-440 RPV surveillance specimens
Master curve (MC) testing of VVER-440 RPV surveillance specimens treated for 27 years (∼200,000 h) in a surveillance channel of Metsamor-NPP was performed to investigate the influence of long term high fluence irradiation on RPV embrittlement. The surveillance chain consisted of both thermal aged specimens (above the core level) and irradiated specimens (inside the core). The reference temperature (To) values obtained from irradiated specimens are compared with the results from thermal aged specimens to characterize irradiation induced shifts in To values for both base and weld metal specimens. It was found that the high fluence irradiation up to a nominal fluence of 3.2 × 1025 n.m-2 at E > 0.5 MeV resulted large embrittlement with To shift values greater than 300 °C for both base and weld metal specimens. The obtained shifts in To values at these high fluence values were used to compare with the predictions from PNAE procedure in the Russian regulatory guide outside its validity range. It was found that the measured shift in reference temperature for the weld metal was well below the predicted value while, the shift in reference temperature for base metal was largely under-predicted at these high fluence values.
期刊介绍：
The Journal of Nuclear Materials publishes high quality papers in materials research for nuclear applications, primarily fission reactors, fusion reactors, and similar environments including radiation areas of charged particle accelerators. Both original research and critical review papers covering experimental, theoretical, and computational aspects of either fundamental or applied nature are welcome.
The breadth of the field is such that a wide range of processes and properties in the field of materials science and engineering is of interest to the readership, spanning atom-scale processes, microstructures, thermodynamics, mechanical properties, physical properties, and corrosion, for example.
Topics covered by JNM
Fission reactor materials, including fuels, cladding, core structures, pressure vessels, coolant interactions with materials, moderator and control components, fission product behavior.
Materials aspects of the entire fuel cycle.
Materials aspects of the actinides and their compounds.
Performance of nuclear waste materials; materials aspects of the immobilization of wastes.
Fusion reactor materials, including first walls, blankets, insulators and magnets.
Neutron and charged particle radiation effects in materials, including defects, transmutations, microstructures, phase changes and macroscopic properties.
Interaction of plasmas, ion beams, electron beams and electromagnetic radiation with materials relevant to nuclear systems.
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