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Development and test of a new verification scheme for transient core simulators

Christophe Demazière (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Victor Dykin (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)) ; Klas Jareteg (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers))
Transactions of the American Nuclear Society, San Francisco, CA, USA, June 11-15, 2017 Vol. 116 (2017), p. 1025-1026.
[Konferensbidrag, refereegranskat]

Transient calculations in commercial nuclear reactors are performed while typically relying on a time-dependent neutron transport solver or a low-order solver (i.e. diffusion). In order to be licensed, the codes used by the industry need to go through a process of verification and validation, with the verification carried out by comparing the results of simulations to analytical or semi-analytical solutions. Such analytical or semi-analytical solutions can only be obtained if the system to be modelled during the verification process is either fully homogeneous or piece-wise homogeneous. This paper reports on the development of a different verification approach that can be applied to fully heterogeneous systems. It relies on the extraction of the point-kinetic response of the reactor (which can be estimated from the results of core simulations) and on its subsequent comparison with its expected analytical form.

Nyckelord: computational verification and validation, time-dependent neutron transport, frequency-dependent neutron transport, diffusion theory, neutron fluctuations, neutron noise, point-kinetics



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Denna post skapades 2017-06-16.
CPL Pubid: 249951