Creep and fatigue properties of Incoloy 800H in a high-temperature gas-cooled reactor (HTGR) helium environment

Conference · Sat Dec 31 23:00:00 EST 1977

OSTI ID:6472435

Chow, J G.Y.; Soo, P; Epel, L

A mechanical test program to assess the effects of a simulated HTGR helium environment on the fatigue and creep properties of Incoloy 800H and other primary-circuit metals is described. The emphasis and the objectives of this work are directed toward obtaining information to assess the integrity and safety of an HTGR throughout its service life. The helium test environment selected for study contained 40 ..mu.. atm H/sub 2/O, 200 ..mu.. atm H/sub 2/, 40 ..mu.. atm CO, 10 ..mu.. atm CO/sub 2/, and 20 ..mu.. atm CH/sub 4/. It is believed that this ''wet'' environment simulates that which could exist in a steam-cycle HTGR containing some leaking steam-generator tubes. A recirculating helium loop operating at about 4 psi in which impurities can be maintained at a constant level, has been constructed to supply the desired environment for fatigue and creep testing.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 6472435
• Report Number(s): BNL-NUREG-25624; CONF-780310-3
• Country of Publication: United States
• Language: English

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