Title: Material selection for accident tolerant fuel cladding

Journal Article · · Metallurgical and Materials Transactions. E, Materials for Energy Systems
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  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Alternative cladding materials are being investigated for accident tolerance, which can be defined as >100X improvement (compared to current Zr-based alloys) in oxidation resistance in steam environments at ≥1200°C for short (≤4 h) times. After reviewing a wide range of candidates, current steam oxidation testing is being conducted on Mo, MAX phases and FeCrAl alloys. Recently reported low mass losses for Mo in steam at 800°C could not be reproduced. Both FeCrAl and MAX phase Ti2AlC form a protective alumina scale in steam. Therefore, commercial Ti2AlC that is not single phase, formed a much thicker oxide at 1200°C in steam and significant TiO2, and therefore may be challenging to use as a cladding or a coating. Alloy development for FeCrAl is seeking to maintain its steam oxidation resistance to 1475°C, while reducing its Cr content to minimize susceptibility to irradiation assisted Cr-rich α’ formation. The composition effects and critical limits to retaining protective scale formation at >1400°C are still being evaluated.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE), Fuel Cycle Technologies (NE-5)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1155053
Report Number(s):
M3FT-14OR0202361
Journal Information:
Metallurgical and Materials Transactions. E, Materials for Energy Systems, Journal Name: Metallurgical and Materials Transactions. E, Materials for Energy Systems Journal Issue: 3 Vol. 2; ISSN 2196-2936
Publisher:
ASM InternationalCopyright Statement
Country of Publication:
United States
Language:
English

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