Use of a Pulse Detector for Reactor Noise Measurements

Trinko, J.R.; Hanauer, S.H.; Roux, D.P.; Lorenzo, J.T. De

doi:10.13182/nt70-a28652

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“…REACTOR noise has been the subject of extensive theoretical (COURANT et al, 1947; DE HOFFMAN, 1949;RAIEVSKI, 1958;HARRIS, 1958;KLAHR, 1958;MOORE, 1958;PAL, 1958;VELEZ, 1959;BENNETT, 1960;DALFES, 1962;OSBORN et al, 1963;BELL, 1965;OTSUKA et al, 1965;OSBOIW, 1965) and experimental investigations (ORNDOFF, 1957;BADGLEY et al, 1964;TRINKO et al, 1965;NOMURA, 1966;DRAGT, 1966;GOTOH, 1966) in recent years. The keen interest displayed in the subject has been chiefly motivated by the possibility of obtaining useful information about macroscopic properties of reactors by analysing fluctuations in neutron distributions.…”

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confidence: 99%

Two-group reactor noise analysis by Langevin's technique

Nieto

Akhtar

Ackermann

1968

Journal of Nuclear Energy

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Wgevin's technique is applied to two energy group space independent reactor model. Detection statistics and fluctuations in production and decay rate of delayed neutron precursors are also taken into account. Expressions for the auto-and cross-correlation functions of the fluctuating sources associated with various random processes such as fission, capture, scattering, etc., are obtained and used in finding the auto-and cross-power spectral densities of the detection rates in fast and slow groups. Numerical estimates for various break frequencies for a representative set of parameters are found.

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