Abstract
Effects of uncertainties involved in the modelling of fuel rod thermal
behaviour and materials data are studied by the probabilistic response
surface method. A fuel rod irradiated at the Halden boiling water test
reactor is used as an example. The statistical calculations are
performed with the PROSA-1 and the fuel behaviour analyses with
GAPCON-THERMAL -2 code. Statistical calculations exhibited increasing
uncertainty of the estimated consequences with increasing burnup.
Differences between a simple and complex response surface increased also
with burnup. These differences are largest at the low probability tail
areas of the distributions. The two dominating statistical parameters
were uncertainties associated with the fission gas release model and
fuel thermal conductivity. Other parameters as well as cross-term
variations had only minor effects on results.
Original language | English |
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Pages (from-to) | 163 - 187 |
Number of pages | 25 |
Journal | Res Mechanica |
Volume | 19 |
Issue number | 2 |
Publication status | Published - 1986 |
MoE publication type | Not Eligible |