Iron-Aluminum Base Alloys—cheap stainlesses of the future?

King, B.; Mueller, Juergen; Ida, Noriyuki; Tate, Frank

doi:10.4271/590041

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FeCrAl alloys have excellent resistance to aqueous corrosion, [15,[37][38][39][40] superior resistance to oxidation in high temperature air [17,20,41] and steam, [10,40,[42][43][44][45] and better creep/mechanical properties expected at high temperatures. [10,46,47] The superior high-temperature oxidation resistance of FeCrAl reduces the generation of hydrogen and associated exothermic heat of reaction with coolant during severe accidents, [45,48,49] while the creep/mechanical properties enhance the cladding burst margin.…”

Section: B Fecral Alloys For Nuclear Fuel Cladding In Lwrsmentioning

confidence: 99%

Hydrogen Isotopes Permeation in Clean or Unoxidized FeCrAl Alloys: A Review

Garud¹,

Hoffman²,

Rebak³

2022

Metall Mater Trans A

View full text Add to dashboard Cite

The US Department of Energy is working with fuel vendors to develop accident tolerant fuels (ATF) for the current fleet of light water reactors (LWRs). The ATF should be more resilient to loss of coolant accident scenarios and help extending the life of the operating LWRs. One of the proposed ATF concepts is to use iron-chromium-aluminum (FeCrAl) alloys for the cladding of the fuel. A concern in using ferritic FeCrAl is that this type of cladding may result in an increase in the concentration of tritium in the coolant. The objective of the current critical review is to collect and assess information from the literature regarding diffusion or permeation of hydrogen (H) and its isotopes deuterium (D) and Tritium (T) across industrial alloys (including FeCrAl) used or intended for the nuclear industry. Over a hundred years of data reviewed shows that the solubility of hydrogen in ferritic alloys is lower than in austenitic alloys but hydrogen permeates faster through a ferritic material than through austenitic materials. The tritium permeation rates in FeCrAl alloys are between those in austenitic stainless steels and in ferritic FeCr steels. The activation energy for hydrogen permeation is approximately 30 pct higher in the austenitic alloys compared with the ferritic (typically ∼ 50 kJ/mol in ferritic vs. ∼ 65 kJ/mol in the austenitic). None of the major elements in FeCrAl alloys react with hydrogen to form detrimental hydride phases. The effect of surface oxides on FeCrAl delaying hydrogen entrance into FeCrAl alloy is not part of this review.

show abstract