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Improvement in retention of solid fission products in HTGR fuel particles by ceramic kernel additives

Abstract

Increased requirements concerning the retention of long-lived solid fission products in fuel elements for use in advanced High Temperature Gas-cooled Reactors led to the development of coated particles with improved fission product retention which represent an alternative to silicon carbide-coated fuel particles. Two irradiation experiments have shown that the release of strontium, barium, and caesium from pyrocarbon-coated particles can be reduced by orders of magnitude if the oxide kernel contains alumina-silica additives. It was detected by electron microprobe analysis that the improved retention of the mentioned fission products in the fuel kernel is caused by formation of the stable aluminosilicates SrAl2Si2O8, BaAl2Si2O8and CsAlSi2O6 in the additional alumina-silica phase of the kernel.
Publication Date:
Aug 15, 1975
Product Type:
Technical Report
Report Number:
GERHTR-159; JUL-1226
Reference Number:
ERA-02-004822; EDB-76-096456
Resource Relation:
Other Information: Work performed under United States--German High Temperature Reactor Research Exchange Program; Related Information: English translation from the German report Juel--1226
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; COATED FUEL PARTICLES; DESIGN; HTGR TYPE REACTORS; COATINGS; FISSION PRODUCT RELEASE; FISSION PRODUCTS; PERFORMANCE; PYROLYTIC CARBON; SILICON CARBIDES; CARBIDES; CARBON; CARBON COMPOUNDS; ELEMENTS; FUEL PARTICLES; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; ISOTOPES; NONMETALS; RADIOACTIVE MATERIALS; REACTORS; SILICON COMPOUNDS; 210300* - Power Reactors, Nonbreeding, Graphite Moderated
OSTI ID:
8197455
Research Organizations:
Kernforschungsanlage Juelich G.m.b.H. (Germany, F.R.)
Country of Origin:
Germany
Language:
English
Submitting Site:
TIC
Size:
31 p.
Announcement Date:
Jan 26, 2017

Citation Formats

Foerthmann, R., Groos, E., and Gruebmeier, H. Improvement in retention of solid fission products in HTGR fuel particles by ceramic kernel additives. Germany: N. p., 1975. Web.
Foerthmann, R., Groos, E., & Gruebmeier, H. Improvement in retention of solid fission products in HTGR fuel particles by ceramic kernel additives. Germany.
Foerthmann, R., Groos, E., and Gruebmeier, H. 1975. "Improvement in retention of solid fission products in HTGR fuel particles by ceramic kernel additives." Germany.
@misc{etde_8197455,
title = {Improvement in retention of solid fission products in HTGR fuel particles by ceramic kernel additives}
author = {Foerthmann, R., Groos, E., and Gruebmeier, H.}
abstractNote = {Increased requirements concerning the retention of long-lived solid fission products in fuel elements for use in advanced High Temperature Gas-cooled Reactors led to the development of coated particles with improved fission product retention which represent an alternative to silicon carbide-coated fuel particles. Two irradiation experiments have shown that the release of strontium, barium, and caesium from pyrocarbon-coated particles can be reduced by orders of magnitude if the oxide kernel contains alumina-silica additives. It was detected by electron microprobe analysis that the improved retention of the mentioned fission products in the fuel kernel is caused by formation of the stable aluminosilicates SrAl2Si2O8, BaAl2Si2O8and CsAlSi2O6 in the additional alumina-silica phase of the kernel.}
place = {Germany}
year = {1975}
month = {Aug}
}