Journal
JOURNAL OF NUCLEAR MATERIALS
Volume 489, Issue -, Pages 64-83Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2017.03.037
Keywords
Defective fuel; Fission product release; Diffusion; Recoil release; Visual_ DETECT; STAR; Delayed-neutron monitoring; Fuel reliability indicator
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A review of fission product release theory is presented in support of fuel-failure monitoring analysis for the characterization and location of defective fuel. This work is used to describe: (i) the development of the steady-state Visual_ DETECT code for coolant activity analysis to characterize failures in the core and the amount of tramp uranium; (ii) a generalization of this model in the STAR code for prediction of the time-dependent release of iodine and noble gas fission products to the coolant during reactor start-up, steady-state, shutdown, and bundle-shifting manoeuvres; (iii) an extension of the model to account for the release of fission products that are delayed-neutron precursors for assessment of fuel-failure location; and (iv) a simplification of the steady-state model to assess the methodology proposed by WANO for a fuel reliability indicator for water-cooled reactors. Crown Copyright (C) 2017 Published by Elsevier B.V. All rights reserved.
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