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Postirradiation examination report of TRISO and BISO coated ThO/sub 2/ particles irradiated in capsules HT-31 and HT-33. [HTGR]

Description: Capsules HT-31 and HT-33 were uninstrumented capsule experiments irradiated in the target position of the High-Flux Isotope Reactor at Oak Ridge National Laboratory. The experiments were used to evaluate the irradiation performance of (1) fuel fabricated in a 240-mm-diameter coater for production scale-up, (2) TRISO ThO/sub 2/ and BISO ThO/sub 2/ particles, and (3) fuel with certain OPyC variables. A total of 16 BISO particle samples and 32 TRISO particle samples were irradiated to fast neutron fluences ranging from 4.0 to 11.7 x 10/sup 25/ n/m/sup 2/ (E > 29 fJ)/sub HTGR/ and heavy metal burnups between 3.5% and 13.2% FIMA at temperatures from 1150/sup 0/ to 1530/sup 0/C.
Date: January 1, 1980
Creator: Sedlak, B.J.
Partner: UNT Libraries Government Documents Department

Postirradiation examination of capsule GF-4. [HTGR]

Description: The GF-4 capsule test was irradiated in the SILOE reactor at Grenoble, France between April 8, 1975 and July 26, 1976. High-enriched uranium (HEU) UC/sub 2/ and weak acid resin (WAR) UC/sub x/O/sub y/ fissile and ThO/sub 2/ fertile particles were tested. Postirradiation examination of cured-in-place fuel rods showed no fuel rod/graphite element interaction. In addition, all rods exhibited adequate structural integrity. Irradiation-induced dimensional changes for rods containing all TRISO-coated fuel were consistent with model predictions; however, rods containing BISO-coated fuel exhibited greater volumetric contractions than predicted.
Date: October 1, 1980
Creator: Kovacs, W.J. & Sedlak, B.J.
Partner: UNT Libraries Government Documents Department