Statistical Fluctuations of the Number of Neutrons in a Pile; FLUCTUATIONS STATISTIQUES DU NOMBRE DE NEUTRONS DANS UNE PILE (1ere PARTIE)
Technical Report
·
OSTI ID:4192324
The theory of the statistical fluctuations in a pile is extended to the space-dependent case, and gives the fluctuations of the number of neutrons in a cell of the core or reflector of the pile. This number duanges turough elementary processes occurring at random, which are capture, secondary sources, fission, and scattering. Of all these processes, fission is the only one which damages more than one neutron at a time and so is responsible for the deviation of the fluctuations from a Poisson law. The importance of this deviation depends on the dinmensions of the cell compared to the slowing down lengthin. When the dimensions are small, the fluctuations are close to a Poisson law. (auth)
- Research Organization:
- France. commissariat a l'Energie Atomique, Paris
- NSA Number:
- NSA-14-001096
- OSTI ID:
- 4192324
- Report Number(s):
- CEA-917
- Country of Publication:
- France
- Language:
- English
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