Selected Isotopes for Optimized Fuel Assembly Tags

Gerlach, David C. ; Mitchell, Mark R. ; Reid, Bruce D. ; Gesh, Christopher J. ; Hurley, David E.

Pacific Northwest National Laboratory (U.S.)

关键词: 72 Physics Of Elementary Particles And Fields;    73 Nuclear Physics And Radiation Physics;    Corrosion Resistance;    Tungsten Fuel Assembly Burnup;    Corrosion;   

DOI  :  10.2172/989457
RP-ID  :  PNNL-17053 Vol 2
RP-ID  :  AC05-76RL01830
RP-ID  :  989457

美国|英语

来源: UNT Digital Library

【 摘 要 】

In support of our ongoing signatures project we present information on 3 isotopes selected for possible application in optimized tags that could be applied to fuel assemblies to provide an objective measure of burnup. 1. Important factors for an optimized tag are compatibility with the reactor environment (corrosion resistance), low radioactive activation, at least 2 stable isotopes, moderate neutron absorption cross-section, which gives significant changes in isotope ratios over typical fuel assembly irradiation levels, and ease of measurement in the SIMS machine 2. From the candidate isotopes presented in the 3rd FY 08 Quarterly Report, the most promising appear to be Titanium, Hafnium, and Platinum. The other candidate isotopes (Iron, Tungsten, exhibited inadequate corrosion resistance and/or had neutron capture cross-sections either too high or too low for the burnup range of interest.