skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Irradiation effects on fuels for space reactors

Abstract

A review of irradiation-induced swelling and gas release experience is presented here for the three principal fuels UO/sub 2/, UC, and UN. The primary advantage of UC and UN over UO/sub 2/ is higher thermal conductivity and attendant lower fuel temperature at equivalent pellet diameter and power density, while UO/sub 2/ offers the distinct benefit of well-known irradiation performance. Irradiation test results indicate that at equivalent burnup, temperature, and porosity conditions, UC experiences higher swelling than UO/sub 2/ or UN. Fission gas swelling becomes important at fuel temperatures above 1320 K for UC, and at somewhat higher temperatures for UO/sub 2/ and UN. Evidence exists that at equivalent fuel temperatures and burnups, high density UO/sub 2/ and UN experience comparable swelling behavior; however, differences in thermal conductivity influence overall irradiation performance. The low conductivity of UO/sub 2/ results in higher thermal gradients which contribute to fuel microcracking and gas release. As a result UO/sub 2/ exhibits higher fractional gas release than UN, at least or burnups up to about 3%.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Engineering Science and Analysis, Idaho Falls, ID (USA)
OSTI Identifier:
6315909
Report Number(s):
LA-UR-84-2651; CONF-840113-10
ON: DE84016460
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Symposium on space nuclear power systems, Albuquerque, NM, USA, 10 Jan 1984
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 36 MATERIALS SCIENCE; SPACE POWER REACTORS; NUCLEAR FUELS; URANIUM CARBIDES; PHYSICAL RADIATION EFFECTS; URANIUM DIOXIDE; URANIUM NITRIDES; BURNUP; COATED FUEL PARTICLES; FISSION PRODUCT RELEASE; FUEL PELLETS; GASES; SWELLING; ACTINIDE COMPOUNDS; CARBIDES; CARBON COMPOUNDS; CHALCOGENIDES; ENERGY SOURCES; FLUIDS; FUEL PARTICLES; FUELS; MATERIALS; MOBILE REACTORS; NITRIDES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PELLETS; PNICTIDES; POWER REACTORS; RADIATION EFFECTS; REACTOR MATERIALS; REACTORS; URANIUM COMPOUNDS; URANIUM OXIDES; NESDPS Office of Nuclear Energy Space and Defense Power Systems; 210600* - Power Reactors, Auxiliary, Mobile Package, & Transportable; 360206 - Ceramics, Cermets, & Refractories- Radiation Effects

Citation Formats

Ranken, W A, and Cronenberg, A W. Irradiation effects on fuels for space reactors. United States: N. p., 1984. Web.
Ranken, W A, & Cronenberg, A W. Irradiation effects on fuels for space reactors. United States.
Ranken, W A, and Cronenberg, A W. 1984. "Irradiation effects on fuels for space reactors". United States. https://www.osti.gov/servlets/purl/6315909.
@article{osti_6315909,
title = {Irradiation effects on fuels for space reactors},
author = {Ranken, W A and Cronenberg, A W},
abstractNote = {A review of irradiation-induced swelling and gas release experience is presented here for the three principal fuels UO/sub 2/, UC, and UN. The primary advantage of UC and UN over UO/sub 2/ is higher thermal conductivity and attendant lower fuel temperature at equivalent pellet diameter and power density, while UO/sub 2/ offers the distinct benefit of well-known irradiation performance. Irradiation test results indicate that at equivalent burnup, temperature, and porosity conditions, UC experiences higher swelling than UO/sub 2/ or UN. Fission gas swelling becomes important at fuel temperatures above 1320 K for UC, and at somewhat higher temperatures for UO/sub 2/ and UN. Evidence exists that at equivalent fuel temperatures and burnups, high density UO/sub 2/ and UN experience comparable swelling behavior; however, differences in thermal conductivity influence overall irradiation performance. The low conductivity of UO/sub 2/ results in higher thermal gradients which contribute to fuel microcracking and gas release. As a result UO/sub 2/ exhibits higher fractional gas release than UN, at least or burnups up to about 3%.},
doi = {},
url = {https://www.osti.gov/biblio/6315909}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: