DEGRADATION MODES OF ALLOY 22 IN YUCCA MOUNTAIN REPOSITORY CONDITIONS
The nuclear waste package design for Yucca Mountain (Nevada, USA), in its current configuration, consists of a double wall cylindrical container fabricated using a highly corrosion resistant Ni-based Alloy 22 for the outer barrier and type 316 stainless steel for the inner structural vessel. A mailbox-shaped drip shield fabricated primarily using Ti Grade 7 will cover the waste packages. The environmental degradation of the relevant materials have been extensively studied and modeled for over ten years. This paper reviews the state-of-the-art understanding of the degradation modes of Alloy 22 (N06022) due to its interaction with the predicted in-drift mountain conditions including temperature and types of electrolytes. Subjects discussed include thermal aging and phase stability, dry oxidation, general and localized corrosion, stress corrosion cracking and hydrogen induced cracking.
- Research Organization:
- Office of Scientific and Technical Information (OSTI), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- NA
- OSTI ID:
- 860241
- Report Number(s):
- NA; MOL.20051103.0152 DC#45935; TRN: US0600566
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
36 MATERIALS SCIENCE
ALLOYS
CONFIGURATION
CONTAINERS
CORROSION
DESIGN
ELECTROLYTES
HYDROGEN
OXIDATION
PHASE STABILITY
RADIOACTIVE WASTES
SHIELDS
STAINLESS STEELS
STRESS CORROSION
WASTES
YUCCA MOUNTAIN