Microstructural examination of reactor pressure vessel steels by positron annihilation point of view |
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| Affiliation: | 1. Key Laboratory of Beam Technology of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;2. Laboratory of Beam Technology and Energy Materials, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, 519087, China;3. Beijing Radiation Center, Beijing Academy of Science and Technology, Beijing 100875, China |
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| Abstract: | This paper presents a comparison of commercially used German and Russian reactor pressure vessel steels from the positron annihilation spectroscopy (PAS) point of view, having in mind knowledge obtained also from other techniques from the last decades.The second generations of Russian RPV steels seems to be fully comparable with German steels and their quality enables prolongation of NPP operating lifetime over projected 40 years. The embrittlement of CrMoV steel is very low due to the dynamic recovery of radiation-induced defects at reactor operating temperatures. |
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