Experimental validation of the LWR reactivity loss with burn up: Analysis of spent fuel oscillation experiments
- Commissariat a l'Energie Atomique, Cadarache, DEN/DER, 13108 Saint-Paul-Lez-Durance (France)
The reactivity loss with fuel depletion is linked to a major parameter in PWR fuel management: the cycle length. This paper demonstrates that APOLLO2 lattice code and JEFF associated nuclear data are able to predict this main neutronics parameter. Spent fuel worth measurements of high burn-up UOx (up to 70 GWd/t) and MOx pins (up to 60 GWd/t) were performed in the MINERVE facility using an oscillation technique. The analysis shows slight discrepancies between calculated and experimental reactivity loss with depletion. These discrepancies are reduced using the latest European Nuclear Data File JEFF-3.1. Calculation-Experiment biases are summarized below: JEF-2.2 Results: JEFF-3.1 Results: UOx: +2.3% {+-} 1.3% +0.6% {+-} 1.3%(1{sigma}) MOx: -1.0% {+-} 1.5% +1.5% {+-} 1.5%(1{sigma}). (authors)
- Research Organization:
- American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
- OSTI ID:
- 22039459
- Country of Publication:
- United States
- Language:
- English
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