FUEL BEHAVIOUR AFTER A LOSS OF COOLANT IN AN IRRADIATED FUEL BAY


41th Annual CNS-CNA Student Conference - 2017 June 05

Presented at:
41th Annual CNS-CNA Student Conference
2017 June 05
Location:
Niagara Falls, ON Canada
Session Title:
Student Posters, Wine-&-Cheese Reception

Authors:
D. Logtenberg (RMC)
P. Chan (RMC)
E. Corcoran (RMC)
  

Abstract

A loss of the water in an Irradiated Fuel Bay would cause fuel bundles stored on racks to accumulate heat. When the sheath reaches sufficient temperatures, the oxidation may become a self-sustaining ‘breakaway’ reaction and result in a zirconium fire. This work simulates the temperature increase of a fuel bundle exposed to air with the finite element solver COMSOL®. Fresh bundles with a decay heat greater than 2 kW reached transition temperatures for post-breakaway kinetics within 20-55 minutes indicating potential for fuel damage. Determining the breakaway time more accurately and scaling to ascertain the safety of racks are next steps.

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