GENERAL AND LOCALIZED CORROSION STUDIES OF TYPE 300 SERIES AUSTENITIC STAINLESS STEELS IN SIMULATED SUPERHEAT REACTOR ENVIRONMENT
The followlng conclusions are based on the out-of-pile general corrosion and localized attack studies completed to-date on several 300 series stainless steels: 1. In a sodium chloride-cycle test that producee a type failure that canoccur in a superheat reactor system, Types 347 and vacuum-melted 304 SS have failed while vacuum-melted 310 SS was acceptable. 2. An improved chloride cycle test utilizing ferric chloride as the additive was developed that produces an intergranular type failure similar to that experienced in the fuel cladding failures in the SADE and ESADE facilities. Types 354 and 318 SS have failed in the test. 3. Present methods of ultrasonic testing will find through cracks but are not completely dependable for assessing lesser degrees of Intergranular attack. 4. It is hypothesized that a definite interplay exists between chemical attack and stress. The application of stress wtll orient intergranular attack preferentially in a direction perpendicular to the stress. (auth)
- Research Organization:
- General Electric Co. Atomic Power Equipment Dept., San Jose, Calif.
- NSA Number:
- NSA-17-039487
- OSTI ID:
- 4641765
- Report Number(s):
- GEAP-4310
- Country of Publication:
- United States
- Language:
- English
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