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Title: MODERATOR TEMPERATURE COEFFICIENTS IN HEAVY WATER REACTORS

Abstract

Reactors that are moderated with heavy water differ from those that are moderated with graphite in that (1) the moderator temperature is lower than it may be in graphite reactors, (2) when the moderator temperature is raised, the moderator-to-fuel ratio decreases, and (3) circulation in the moderator introduces local, random changes in reactivity that distort the flux distribution. The large negative contributions to the moderator temperature coefficient from leakage and resonance capture overshadow any positive contribution from eta that may accompany the buildup of plutonium with exposure. The effect of the coefficient on reactor safety depends upon the manner in which the D/sub 2/O circulation couples the reactor power to the moderator temperature. (auth)

Authors:
Publication Date:
Research Org.:
Du Pont de Nemours (E.I.) & Co. Savannah River Lab., Aiken, S.C.
OSTI Identifier:
4186804
Report Number(s):
DP-452
NSA Number:
NSA-14-009169
DOE Contract Number:  
AT(07-2)-1
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
REACTOR TECHNOLOGY; BREEDING; HEAVY WATER MODERATOR; LEAKS; NEUTRON FLUX; PLUTONIUM; REACTIVITY; REACTOR SAFETY; REACTORS; RESONANCE ESCAPE PROBABILITY; TEMPERATURE; TEMPERATURE COEFFICIENT; VARIATIONS

Citation Formats

St. John, D.S. MODERATOR TEMPERATURE COEFFICIENTS IN HEAVY WATER REACTORS. United States: N. p., 1959. Web. doi:10.2172/4186804.
St. John, D.S. MODERATOR TEMPERATURE COEFFICIENTS IN HEAVY WATER REACTORS. United States. doi:10.2172/4186804.
St. John, D.S. Tue . "MODERATOR TEMPERATURE COEFFICIENTS IN HEAVY WATER REACTORS". United States. doi:10.2172/4186804. https://www.osti.gov/servlets/purl/4186804.
@article{osti_4186804,
title = {MODERATOR TEMPERATURE COEFFICIENTS IN HEAVY WATER REACTORS},
author = {St. John, D.S.},
abstractNote = {Reactors that are moderated with heavy water differ from those that are moderated with graphite in that (1) the moderator temperature is lower than it may be in graphite reactors, (2) when the moderator temperature is raised, the moderator-to-fuel ratio decreases, and (3) circulation in the moderator introduces local, random changes in reactivity that distort the flux distribution. The large negative contributions to the moderator temperature coefficient from leakage and resonance capture overshadow any positive contribution from eta that may accompany the buildup of plutonium with exposure. The effect of the coefficient on reactor safety depends upon the manner in which the D/sub 2/O circulation couples the reactor power to the moderator temperature. (auth)},
doi = {10.2172/4186804},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {12}
}

Technical Report:

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