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Corrosion in the off-gas system of a radioactive-waste incinerator

Conference ·
OSTI ID:7148148
Corrosion in a low-level radioactive-waste incinerator off-gas system at the Department of Energy's Savannah River Plant is discussed. Severe corrosive attack and failure of an alloy 600 part exposed to high-temperature (>1000/sup 0/C) gases was observed. Rapid attack of carbon steel components, and cracking of austenitic stainless steel parts also occurred at locations where lower gas temperatures and periodic condensate exposure occurred. Investigation showed HCl, SO/sub 2/, SO/sub 3/ and phosphorus-oxides were present and contributed to the failures. Mechanisms of high-temperature failure include alloy separation and reactions with phosphorus. Coupons placed in the exhaust stream have provided information for selection of future materials of construction for system components. Several nickel- and iron-base alloys, and a stainless steel with an aluminum-diffusion coating were investigated.
Research Organization:
Du Pont de Nemours (E.I.) and Co., Aiken, SC (USA). Savannah River Plant
DOE Contract Number:
AC09-76SR00001
OSTI ID:
7148148
Report Number(s):
DP-MS-86-51; CONF-870314-2; ON: DE87002646
Country of Publication:
United States
Language:
English