Abstract
Cobalt-60 contained in reactor water primarily causes contamination of boiling water reactor (BWR) out-of-core components. To elucidate the contamination mechanism, the deposition of radionuclides on stainless steels has been evaluated in actual reactor water at a commercially operating BWR. No significant difference was observed between Types 304 and 316L stainless steel. The deposition rate of /sup 60/Co was mainly controlled by the growth of oxide films formed on steel. The deposition kinetics of anion /sup 51/Cr was very different from that of cations /sup 60/Co and /sup 58/Co. An Arrhenius temperature dependence was established for the deposition rate of /sup 60/Co between 130 and 240/sup 0/C.
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