MILD STEEL IN PRIMARY CIRCUITS IN WATER COOLED POWER REACTORS
Corrosion of mild steel in water of different qualities is reviewed. The corrosion rate in hydrogenated water at pH 10 to 1l is 40 mg Fe/dm/sup 2/- month or lower after an extended conditioning period. When pH is reduced the rate is increased and the products appear in a more unsuitable form from a purification point of view. Oxygen and hydrogen contents normally experienced in boiling water reactors appear to result in the lowest corrosion rates observed when the water is neutral. An evaluation of the release rates of corrosion products and the expected activity level, compared with the figures observed in stainless steel systems, indicate that a mild steel circuit should not give rise to particularily difficult purification problems. All considered, the boiling system with neutral water appears to be the most promising one in as much as purification and water monitoring costs would be about the same as those for a stainless steel system. If necessary the oxygen level in a boiling water reactor can be kept at fairly low values. (auth)
- Research Organization:
- Norway. Institutt for Atomenergi, Kjeller
- NSA Number:
- NSA-17-022113
- OSTI ID:
- 4714114
- Report Number(s):
- KR-39
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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