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Theoretical investigation of the MTC noise estimate in 1-D homogeneous systems

Christophe Demazière (Institutionen för reaktorfysik) ; Imre Pázsit (Institutionen för reaktorfysik)
Proc. 28th Informal Mtg. Reactor Noise (IMORN-28) (2000)
[Konferensbidrag, refereegranskat]

Two possible reasons of the MTC underestimation by noise analysis are investigated: the deviation from point-kinetics of the reactor response, and the effect of randomly distributed (both in time and in space) noise sources. The strong deviation of the MTC noise estimate from its actual value is found to be mainly due to the heterogeneous structure of the temperature noise. The spatial heterogeneous temperature noise distribution gives both a smaller (space independent) reactivity effect, and a smaller (space dependent) cross-power spectrum density between neutron and temperature noise, in comparison with homogeneous noise sources, on which the MTC definition relies.

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Denna post skapades 2015-09-01.
CPL Pubid: 221640


Institutioner (Chalmers)

Institutionen för reaktorfysik (1960-2005)


Teknisk fysik

Chalmers infrastruktur