TAILIEUCHUNG - PWR secondary water chemistry guidelines in Japan - Purpose and technical background

This paper introduces the purpose, technical background and framework of preliminary secondary water chemistry guidelines for Japanese PWRs. Addition, the differences in bases of parameter settings between the Japanese and overseas guidelines are discussed. | Progress in Nuclear Energy 114 2019 121 137 Contents lists available at ScienceDirect Progress in Nuclear Energy journal homepage locate pnucene PWR secondary water chemistry guidelines in Japan - Purpose and technical T background Hirotaka Kawamuraa Yasuhiko Shodab Takumi Terachic Yosuke Katsumurad Shunsuke Uchidae Takayuki Mizunof Yusa Muroyag Yasuo Tsuzukih Ryuji Umeharai Hideo Hiranoj Takao Nishimurab a Central Research Institute of Electric Power Industry Japan b Mitsubishi Heavy Industry Ltd Japan c Institute of Nuclear Safety System Inc Japan d University of Tokyo Japan e Tohoku University Japan f Mie University Japan g Osaka University Japan h Japan Nuclear Safety Institute Japan i Japan Nuclear Safety Institute Japan j Central Research Institute of Electric Power Industry Japan A R T I C LE I N FO A B S T R A C T Keywords In the more than 40 years of operational history of pressurized water reactors PWRs in Japan sustainable Guidelines development of water chemistry technologies has resulted in the world s highest secondary system component PWR integrity additionally secondary system components especially steam generator SG tubing with excellent Secondary water chemistry material integrity have been developed to prevent leakage of radioactive contamination from the primary to the System component integrity secondary system and to maintain the heat removal function of the secondary system. Although reasonable Steam generator Stress corrosion cracking control and diagnostic parameters for water chemistry are utilized by each PWR owner the specific values are Flow accelerated corrosion not shared. To ensure reliable PWR operation and to achieve the highest safety level relevant members of the Standards Committee and the related committee organized by the Atomic Energy Society of Japan AESJ decided to establish water chemistry guidelines for PWRs. The Japanese PWR secondary water chemistry guidelines provide strategies for improving material .

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