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Thermal flux flattering and increase of reactor output

Abstract

It is worthwhile, when building power reactors, to have excess reactivity in order to increase rating by fitting closely together the heat sources and the cooling possibilities. The power per unit volume of a graphite reactor can then be increased, given the power of the most heavily loaded channel. The solutions adopted for G.1, G.2, and E.D.F.1 are described here, and also the improvements based on the actual neutron flux flattening, the introduction of several zones for the coolant, the variation of uranium rod and coolant channel diameters according to their location, and finally the change in lattice pitch. The perturbation of neutron flux due to variation of mean absorption in the lattice is also discussed. (author)
Authors:
Horowitz, J; Bussac, J [1] 
  1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Publication Date:
Jul 01, 1959
Product Type:
Technical Report
Report Number:
CEA-R-1106
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; AUGMENTATION; CHINON-1 REACTOR; CONFIGURATION CONTROL; DIFFUSION LENGTH; FUEL ASSEMBLIES; FUEL CHANNELS; FUEL RODS; G-1 REACTOR; G-2 REACTOR; MATERIAL BUCKLING; MEAN FREE PATH; NEUTRON FLUX FLATTENING; OPTIMIZATION; POISONING; POWER DENSITY; POWER DISTRIBUTION; REACTOR LATTICE PARAMETERS; THERMAL NEUTRONS; URANIUM
OSTI ID:
20912777
Research Organizations:
CEA Saclay, 91 - Gif-sur-Yvette (France)
Country of Origin:
France
Language:
English
Other Identifying Numbers:
TRN: FR07R1106073953
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
11 pages
Announcement Date:
Sep 22, 2007

Citation Formats

Horowitz, J, and Bussac, J. Thermal flux flattering and increase of reactor output. France: N. p., 1959. Web.
Horowitz, J, & Bussac, J. Thermal flux flattering and increase of reactor output. France.
Horowitz, J, and Bussac, J. 1959. "Thermal flux flattering and increase of reactor output." France.
@misc{etde_20912777,
title = {Thermal flux flattering and increase of reactor output}
author = {Horowitz, J, and Bussac, J}
abstractNote = {It is worthwhile, when building power reactors, to have excess reactivity in order to increase rating by fitting closely together the heat sources and the cooling possibilities. The power per unit volume of a graphite reactor can then be increased, given the power of the most heavily loaded channel. The solutions adopted for G.1, G.2, and E.D.F.1 are described here, and also the improvements based on the actual neutron flux flattening, the introduction of several zones for the coolant, the variation of uranium rod and coolant channel diameters according to their location, and finally the change in lattice pitch. The perturbation of neutron flux due to variation of mean absorption in the lattice is also discussed. (author)}
place = {France}
year = {1959}
month = {Jul}
}