ADDITIONAL MEASUREMENTS OF THE REACTIVITY TRANSIENT IN IRRADIATED THORIUM
Reactivity measurements were made on two pairs of thorium slugs. One pair of Savannah River type slugs was irradiated in MTR in L-58 for an estimated 2.5 x 10/sup 20/ nvt at an estimated flux level of 1.8 x 10/sup 14/ nv. The other pair was Hanford type and was irradiated in A-5 for an estimated 6.6 x 10/ sup 20/ nvt at an estimated level of 2.0 x 10/sup 13/ nv. Estimates of the decay constant of Pa/sup 233/ and the U/sup 23/ >s/sup 3/ content of the slugs were made in the Reactivity Measurement Facility. It is concluded that (1) the long-term reactivity transient is due to Pa/sup 233/ decay, (2) thorium slugs can be irradiated in MTR at flux levels of 10/sup 14/ nv to a U/sup 233/ content of 6 grams without damage to the slugs, and (3) the in-pile cross section of Pa/ sup 233/ can be measured by this method provided an independent measurement of the irradiating flux is made. (D.L.C.)
- Research Organization:
- Phillips Petroleum Co. Atomic Energy Div., Idaho Falls, Idaho
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- DOE Contract Number:
- AT(10-1)-205
- NSA Number:
- NSA-15-017545
- OSTI ID:
- 4021576
- Report Number(s):
- IDO-16660
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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