Development and test of a new verification scheme for transient core simulators
Paper i proceeding, 2017

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.

neutron noise


diffusion theory

neutron fluctuations

time-dependent neutron transport

computational verification and validation

frequency-dependent neutron transport


Christophe Demaziere

Chalmers, Fysik, Subatomär fysik och plasmafysik

Victor Dykin

Chalmers, Fysik, Subatomär fysik och plasmafysik

Klas Jareteg

Chalmers, Fysik, Subatomär fysik och plasmafysik

Transactions of the American Nuclear Society

0003-018X (ISSN)

Vol. 116 1025-1026


Annan teknik

Annan fysik



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