Gaseous fission product release during storage at various temperatures for HTGR-type fuels [electronic resource]
Measurements were made of gaseous fission product releases from an HTGR-type fuel body under conditions simulating storage at temperatures up to 300°C. The fuel was a recycle test element containing BISO-BISO coated fuel particles which had been irradiated for 701 effective full-power days in the Pe...
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Online Access |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Oak Ridge, Tenn. : Oak Ridge, Tenn. :
Oak Ridge National Laboratory. ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1978.
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| Subjects: |
| Summary: | Measurements were made of gaseous fission product releases from an HTGR-type fuel body under conditions simulating storage at temperatures up to 300°C. The fuel was a recycle test element containing BISO-BISO coated fuel particles which had been irradiated for 701 effective full-power days in the Peach Bottom HTGR. Storage test temperatures were ambient (about 30°C), 100, 150, 200, and 300°C. The initial release rates of ⁸⁵Kr varied after each change in temperature. A fairly stable release rate was reached that increased from approximately 60 ..mu..Ci/day at ambient temperature to approximately 1000 ..mu..Ci/day after 30 days at 200°C and slowly decreased to about 200 ..mu..Ci/day after 554 days at 200°C. In the experiment at 300°C, a final release rate of 4000 ..mu..Ci/day was attained after 66 days. The releases of ⁸⁵Kr were followed for about two and one-half years. The stabilized release rates for ³H were approximately 0.02 ..mu..Ci/day at ambient temperature, approximately 0.750 ..mu..Ci/day at 200°C after 30 days, and 0.460 ..mu..Ci/day after 554 days. The final release rate at 300°C was about 30 ..mu..Ci/day after 66 days.Over the lifetime of the experiment, approximately 22% of the initial ⁸⁵Kr inventory was evolved and swept out, and approximately 4% of the initial ³H inventory was evolved and swept out. The activation energies calculated for the Kr and ³H evolution were approximately 7.8 kcal/mole and approximately 12.4 kcal/mole, respectively. |
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| Item Description: | Published through SciTech Connect. 07/01/1978. "ornl/tm-6409" Fitzgerald, C.L.; Vaughen, V.C.A.; Shannon, R.J. |
| Physical Description: | Pages: 44 : digital, PDF file. |