Conference Proceedings Paper
POWER FLATTENING AND REACTIVITY SUPPRESSION STRATEGIES FOR THE CANADIAN SUPERCRITICAL WATER REACTOR CONCEPT
35th Annual CNS Conference - 2015 May 31 - June 3
M. McDonald (Canadian Nuclear Laboratories)
A. Colton (Canadian Nuclear Laboratories)
J. Pencer (Canadian Nuclear Laboratories)
The Canadian supercritical water-cooled reactor (SCWR) is a conceptual heavy water moderated, supercritical light water cooled pressure tube reactor. In contrast to current heavy water power reactors, the Canadian SCWR will be a batch fuelled reactor. Associated with batch fuelling is a large beginning-of-cycle excess reactivity. Furthermore, radial power peaking arising as a consequence of batch refuelling must be mitigated in some way. In this paper, burnable neutron absorber (BNA) added to fuel and absorbing rods inserted into the core are considered for reactivity management and power flattening. A combination of approaches appears adequate to reduce the core radial power peaking, while also providing reactivity suppression.
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