THE H-3 IRRADIATION EXPERIMENT: IRRADIATION OF EGCR GRAPHITE. Interim Report No. 1
Electric Co. Hanford Atomic Products Operation, RichIrradiation experiments are being performed in the GETR to determine the long-term stability of EGCR graphite. The results of two experiments with a peak total exposure equivalent to 38,000 MWD/AT in the EGCR are available. This is approximately one half the expected lifetime exposure of the EGCR. The H-3-l and H-3-2 capsules contained samples of EGCR graphite and reference CSF graphite. Both capsules were identical and were irradiated sequentially to increasc the dose on the samples. Sixty per cent of the samples irradiated in the H-3-l capsulc were reirradiated in the H-3-2 capsule. The capsule design utilized the gamma heating of the GETR E-7 facility to achieve desired operating temperatures. The temperatures on inter- and intra-cycle irradiation were constant within 25 f C. Samples were irradiated in a temperature range of 475 to 850 f C. The graphite tested was obtained from a fullsize cross section of an EGCR block. Irradiation results did not indicate differences in contraction of parallel samples chosen at several positions within the block. Contraction rates of the graphites tested were found to depend on the temperature of irradiation. Estimates of the contraction rates of parallel samples of EGCR graphite are 0.l5% per l0/sup 21/ nvt at 575 f C and 0.19% per 10/sup 21/ nvt at 475 f C. Parallel samples contracted at a higher rate than the transverse samples. The observed length changes are presented as a function of exposure. (auth)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-16-006786
- OSTI ID:
- 4820123
- Report Number(s):
- HW-71500-A
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- United States
- Language:
- English
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