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Title: MULTIGROUP CALCULATIONS OF EFFECTIVE NEUTRON FRACTION $beta$eff' PROMPT NEUTRON LIFETIME lp' AND RELATED KINETICS PARAMETERS FOR LARGE, FAST, PLUTONIUM-FUELED REACTORS

Abstract

Large, plutonium-fueled, fast reactors will have a different kinetic behavior than fast reactors fueled with U/sup 235/, due to the much smaller delayed-neutron fraction emitted in the fissioning of plutonium. The fissioning of Pu/sup 240/, Pu/sup 241/, Pu/sup 242/, and especially U/sup 238/, which emit mor e delayed neutrons per fission than Pu/sup 239/, introduces a considerable increase in BETA /sub eff/ over that for a hypothetical pure Pu/sup 239/ reactor. The cases considered are 800-, 1500-, and 2500-liter cores fueled with plutonium of different isotopic content, which lead to effective delayed-neutron fractions of approximately one-half the values of similar U/sup 235/-U/sup 238/-fueled fast reactors. The energy spectrum and the number of fissions weighted with their importance are recorded in order to reason physically on the obtained parameters. (auth)

Authors:
Publication Date:
Research Org.:
Argonne National Lab., Ill.
OSTI Identifier:
4785756
Report Number(s):
ANL-6423
NSA Number:
NSA-16-029997
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-62
Country of Publication:
United States
Language:
English
Subject:
REACTOR TECHNOLOGY; CROSS SECTIONS; DELAYED NEUTRONS; DIFFERENTIAL EQUATIONS; ENERGY; FAST NEUTRONS; FISSION; FUELS; GROUP THEORY; LIFETIME; MULTIPLICATION FACTORS; NEUTRONS; PLUTONIUM; PLUTONIUM 239; PLUTONIUM 240; PLUTONIUM 241; PLUTONIUM 242; PROMPT NEUTRONS; REACTIVITY; REACTOR CORE; REACTORS; SPECTRA; URANIUM 235; URANIUM 238; VARIATIONS; VOLUME

Citation Formats

Sandmeier, H. A. MULTIGROUP CALCULATIONS OF EFFECTIVE NEUTRON FRACTION $beta$eff' PROMPT NEUTRON LIFETIME lp' AND RELATED KINETICS PARAMETERS FOR LARGE, FAST, PLUTONIUM-FUELED REACTORS. United States: N. p., 1961. Web. doi:10.2172/4785756.
Sandmeier, H. A. MULTIGROUP CALCULATIONS OF EFFECTIVE NEUTRON FRACTION $beta$eff' PROMPT NEUTRON LIFETIME lp' AND RELATED KINETICS PARAMETERS FOR LARGE, FAST, PLUTONIUM-FUELED REACTORS. United States. https://doi.org/10.2172/4785756
Sandmeier, H. A. 1961. "MULTIGROUP CALCULATIONS OF EFFECTIVE NEUTRON FRACTION $beta$eff' PROMPT NEUTRON LIFETIME lp' AND RELATED KINETICS PARAMETERS FOR LARGE, FAST, PLUTONIUM-FUELED REACTORS". United States. https://doi.org/10.2172/4785756. https://www.osti.gov/servlets/purl/4785756.
@article{osti_4785756,
title = {MULTIGROUP CALCULATIONS OF EFFECTIVE NEUTRON FRACTION $beta$eff' PROMPT NEUTRON LIFETIME lp' AND RELATED KINETICS PARAMETERS FOR LARGE, FAST, PLUTONIUM-FUELED REACTORS},
author = {Sandmeier, H. A.},
abstractNote = {Large, plutonium-fueled, fast reactors will have a different kinetic behavior than fast reactors fueled with U/sup 235/, due to the much smaller delayed-neutron fraction emitted in the fissioning of plutonium. The fissioning of Pu/sup 240/, Pu/sup 241/, Pu/sup 242/, and especially U/sup 238/, which emit mor e delayed neutrons per fission than Pu/sup 239/, introduces a considerable increase in BETA /sub eff/ over that for a hypothetical pure Pu/sup 239/ reactor. The cases considered are 800-, 1500-, and 2500-liter cores fueled with plutonium of different isotopic content, which lead to effective delayed-neutron fractions of approximately one-half the values of similar U/sup 235/-U/sup 238/-fueled fast reactors. The energy spectrum and the number of fissions weighted with their importance are recorded in order to reason physically on the obtained parameters. (auth)},
doi = {10.2172/4785756},
url = {https://www.osti.gov/biblio/4785756}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 1961},
month = {Fri Sep 01 00:00:00 EDT 1961}
}