Some properties of zero power neutron noise in a time-varying medium with delayed neutrons
Artikel i vetenskaplig tidskrift, 2008

The temporal evolution of the distribution of the number of neutrons in a time-varying multiplying system, producing only prompt neutrons, was treated recently with the master equation technique by some of the present authors. Such a treatment gives account of both the so-called zero power reactor noise and the power reactor noise simultaneously. In particular, the first two moments of the neutron number, as well as the concept of criticality for time-varying systems, were investigated and discussed. The present paper extends these investigations to the case when delayed neutrons are also taken into account. Due to the complexity of the description, only the expectation of the neutron number is calculated. The concept of criticality of a time-varying system is also generalized to systems with delayed neutrons. The temporal behaviour of the expectation of the number of neutrons and its asymptotic properties are displayed and discussed.

neutron fluctuations

zero power

Neutron noise

time-varying medium

delayed neutrons

Författare

Yasunori Kitamura

Nagoya University

L. Pal

Hungarian Academy of Sciences KFKI Atomic Energy Research Institute

Imre Pazsit

Chalmers, Teknisk fysik, Nukleär teknik

Akio Yamamoto

Nagoya University

Yoshihiro Yamane

Nagoya University

Annals of Nuclear Energy

0306-4549 (ISSN)

Vol. 35 1621-1627

Ämneskategorier

Övrig annan teknik

Annan fysik

DOI

10.1016/j.anucene.2008.02.016