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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
C. E. Sessions, J. H. DeVan
Nuclear Technology | Volume 9 | Number 2 | August 1970 | Pages 250-259
Material | Symposium on Theoretical Models for Predicting In-Reactor Performance of Fuel and Cladding Material | doi.org/10.13182/NT70-A28814
Articles are hosted by Taylor and Francis Online.
This paper describes the effect of temperature on the mass transfer of niobium alloys in lithium as determined in thermal convection loop tests to 1300°C. All loops were operated for 3000 h in an ultrahigh vacuum environment; A consistent finding in these tests was the preferential movement of zirconium and nitrogen between heated and cooled regions, which in 1200°C tests accounted for most of the observed weight changes. At 1300°C, transport of niobium was also reflected in the weight changes, and crystalline deposits of Nb(C,N) were found on hot-leg specimens. Examination of Nb-1% Zr specimens using an electron microprobe indicated the hot-leg surfaces to be depleted of zirconium to depths of 0.002 and 0.007 in. in 1200 and 1300°C tests, respectively. The results of calculations of the diffusivity of zirconium in niobium based on these data agree well with values predicted from extrapolation of higher temperature data.