Performance of HTGR biso- and triso-coated fertile particles irradiated in capsule HT-34

Technical Report · Sat Aug 01 04:00:00 EDT 1981

DOI:https://doi.org/10.2172/6323597· OSTI ID:6323597

Long, Jr., E. L.; Tiegs, T. N.; Robbins, J. M.; Kania, M. J.

Experiment HT-34, irradiated in the target region of the High Flux Isotope Reactor (HFIR), was designed to correlate HTGR Biso- and Triso-coated particle performance with fabrication parameters. Gamma analysis of the irradiated Triso-coated ThO/sub 2/ particles showed that the SiC deposited at the highest coating rate apparently had the best cesium-retention properties. Results of a similar analysis of the irradiated Biso-coated ThO/sub 2/ particles showed no differences in performance that could be related to coating conditions, but all the particles showed a significant loss of cesium (> 50%) at the higher temperatures. Pressure-vessel failures occurred with a significant number of particles; however, fission-gas-content measurements made at room temperature showed that the intact Biso particles from all batches except one became permeable during irradiation.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6323597
• Report Number(s): ORNL/TM-7674; ON: DE81030430
• Country of Publication: United States
• Language: English

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