Abstract
Pulse irradiation at Nuclear Safety Research Reactor (NSRR) was performed using low-enriched (19.89 w% {sup 235}U) unirradiated silicide plate-type miniature fuel which had a density of 4.8 gU/cm{sup 3}. Experimental aims are to understand the dimensional stability and to clarify the failure threshold of the silicide plate-type miniature fuel under power transient conditions through post-pulse detail metallographic examinations. A silicide plate-type miniature fuel was loaded into an irradiation capsule and irradiated by a single pulse. Deposited energies given in the experiments were 62, 77, 116 and 154 cal/g{center_dot}fuel, which lead to corresponding peak fuel plate temperatures, 201 {+-} 28degC, 187 {+-} 10degC, 418 {+-} 74degC and 871 {+-} 74degC, respectively. Below 400degC, reliability and dimensional stability of the silicide plate fuel was sustained, and the silicide plate fuel was intact. Up to 540degC, wall-through intergranular crackings occurred in the Al-3%Mg alloy cladding. With the increase of the temperature, the melting of the aluminum cladding followed by recrystallization, the denudation of fuel core and the plate-through intergranular cracking were observed. With the increase of the temperature beyond 400degC, the bowing of fuel plate became significant. Above the temperature of 640degC molten aluminum partially reacted with the fuel core, partially flowed downward
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Yanagisawa, Kazuaki
[1]
- Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Citation Formats
Yanagisawa, Kazuaki.
Post-pulse detail metallographic examinations of low-enriched uranium silicide plate-type miniature fuel.
Japan: N. p.,
1991.
Web.
Yanagisawa, Kazuaki.
Post-pulse detail metallographic examinations of low-enriched uranium silicide plate-type miniature fuel.
Japan.
Yanagisawa, Kazuaki.
1991.
"Post-pulse detail metallographic examinations of low-enriched uranium silicide plate-type miniature fuel."
Japan.
@misc{etde_10117381,
title = {Post-pulse detail metallographic examinations of low-enriched uranium silicide plate-type miniature fuel}
author = {Yanagisawa, Kazuaki}
abstractNote = {Pulse irradiation at Nuclear Safety Research Reactor (NSRR) was performed using low-enriched (19.89 w% {sup 235}U) unirradiated silicide plate-type miniature fuel which had a density of 4.8 gU/cm{sup 3}. Experimental aims are to understand the dimensional stability and to clarify the failure threshold of the silicide plate-type miniature fuel under power transient conditions through post-pulse detail metallographic examinations. A silicide plate-type miniature fuel was loaded into an irradiation capsule and irradiated by a single pulse. Deposited energies given in the experiments were 62, 77, 116 and 154 cal/g{center_dot}fuel, which lead to corresponding peak fuel plate temperatures, 201 {+-} 28degC, 187 {+-} 10degC, 418 {+-} 74degC and 871 {+-} 74degC, respectively. Below 400degC, reliability and dimensional stability of the silicide plate fuel was sustained, and the silicide plate fuel was intact. Up to 540degC, wall-through intergranular crackings occurred in the Al-3%Mg alloy cladding. With the increase of the temperature, the melting of the aluminum cladding followed by recrystallization, the denudation of fuel core and the plate-through intergranular cracking were observed. With the increase of the temperature beyond 400degC, the bowing of fuel plate became significant. Above the temperature of 640degC molten aluminum partially reacted with the fuel core, partially flowed downward under the influence of surface tension and gravity, and partially formed agglomerations. Judging from these experimental observations, the fuel-plate above 400degC tends to reduce its dimensional stability. Despite of the apparent silicide fuel-plate failure, neither generation of pressure pulse nor that of mechanical energy occurred at all. (J.P.N.).}
place = {Japan}
year = {1991}
month = {Oct}
}
title = {Post-pulse detail metallographic examinations of low-enriched uranium silicide plate-type miniature fuel}
author = {Yanagisawa, Kazuaki}
abstractNote = {Pulse irradiation at Nuclear Safety Research Reactor (NSRR) was performed using low-enriched (19.89 w% {sup 235}U) unirradiated silicide plate-type miniature fuel which had a density of 4.8 gU/cm{sup 3}. Experimental aims are to understand the dimensional stability and to clarify the failure threshold of the silicide plate-type miniature fuel under power transient conditions through post-pulse detail metallographic examinations. A silicide plate-type miniature fuel was loaded into an irradiation capsule and irradiated by a single pulse. Deposited energies given in the experiments were 62, 77, 116 and 154 cal/g{center_dot}fuel, which lead to corresponding peak fuel plate temperatures, 201 {+-} 28degC, 187 {+-} 10degC, 418 {+-} 74degC and 871 {+-} 74degC, respectively. Below 400degC, reliability and dimensional stability of the silicide plate fuel was sustained, and the silicide plate fuel was intact. Up to 540degC, wall-through intergranular crackings occurred in the Al-3%Mg alloy cladding. With the increase of the temperature, the melting of the aluminum cladding followed by recrystallization, the denudation of fuel core and the plate-through intergranular cracking were observed. With the increase of the temperature beyond 400degC, the bowing of fuel plate became significant. Above the temperature of 640degC molten aluminum partially reacted with the fuel core, partially flowed downward under the influence of surface tension and gravity, and partially formed agglomerations. Judging from these experimental observations, the fuel-plate above 400degC tends to reduce its dimensional stability. Despite of the apparent silicide fuel-plate failure, neither generation of pressure pulse nor that of mechanical energy occurred at all. (J.P.N.).}
place = {Japan}
year = {1991}
month = {Oct}
}