Evaluation of BISO and TRISO coated ThO/sub 2/ fuel particles irradiated in HFIR capsules HT-12 through HT-15 and HT-17 through HT-19

Technical Report · Sat Oct 01 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/5226869· OSTI ID:5226869

Scott, C. B.

The HT-12 through HT-15 and HT-17 through HT-19 capsules were uninstrumented experiments conducted in the target position of the High Flux Isotope Reactor at Oak Ridge National Laboratory. The experiments were utilized as evaluation tests of fertile particle coating designs and PyC properties and they provide a basis for normalization of fuel particle design and performance models. A total of thirteen different BISO ThO/sub 2/ particle designs were irradiated to fast neutron fluences ranging from 1.8 to 14.6 x 10/sup 25/ n/m/sup 2/ (E > 29 fJ)/sub HTGR/ and heavy metal burnups ranging from 1.0 to 15.8% FIMA at temperatures of 1025/sup 0/ to 1580/sup 0/C. The results indicated that BISO ThO/sub 2/ particles can be fabricated to survive the most severe large HTGR design irradiation conditions and that anisotropy of the OPyC coating, which is a strong function of coating rate, is one of the most important variables affecting the irradiation performance of BISO coated fertile particles.

• Research Organization: General Atomic Co., San Diego, CA (USA)
• DOE Contract Number: EY-76-C-03-0167-017
• OSTI ID: 5226869
• Report Number(s): GA-A-13557
• Country of Publication: United States
• Language: English

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