Radiation damage measurements on rock salt and other minerals for waste disposal applications. Quarterly report, January 1, 1980-March 31, 1980

Swyler, K.J.; Loman, J.M.; Teutonico, L. J.; Elgort, G.; Levy, P. W.

doi:10.2172/5199677

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1981

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“…The validity of this relation has not been experimentally verified beyond the dosas shown in Fig. 2 samples develop appreciable concentrations of colloids when heated for 1 to 2 hrs in the 150 to 250 C range [5].…”

Section: Table Imentioning

confidence: 93%

Radiation Induced Sodium Metal Colloid Formation in Natural Rock Salt From Different Geological Localities

1981

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Radiation damage has been studied in natural rock salt from various localities, including potential repository sites. In the 100 to 300 C range the damage consists of point defects, primarily F-centers, and colloidal metal sodium particles. With increasing dose the F-centers grow to a saturation level, reached at IO~~1O S rad, that decreases with increasing temperature to a negligible level at 300 C. Colloid concentration vs. irradiation-time curves follow nucleation and growth curves accurately described by Ct n , or C(dose) n , relations at large irradiation times. For fourteen samples, n*l.85± 0.13 but the values of C vary by a factor of more than 10 3 . The constant C is related to the sample strain, the impurity and void content, dose rate, and possibly other factors. The currently available data indicate that rock salt adjacent to radioactive waste canisters, at a temperature of 150 c, will contain between 0.01 and 10 mole percent of sodium metal when the total dose reaches 10 10 rad.

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Section: Table Imentioning

confidence: 93%

Radiation Induced Sodium Metal Colloid Formation in Natural Rock Salt From Different Geological Localities

1981

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Radiation damage measurements on rock salt and other minerals for waste disposal applications. Quarterly report, January 1, 1980-March 31, 1980

Abstract: This report covers the activities of a small group at Brookhaven National Laboratory (BNL) studying radiation damage in.natura1 rock salt, synthetic NaCl crystals, granite, basalt and other minerals of interest for radioactive waste disposal applications. The people involved are:

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Radiation Induced Sodium Metal Colloid Formation in Natural Rock Salt From Different Geological Localities

Radiation Induced Sodium Metal Colloid Formation in Natural Rock Salt From Different Geological Localities

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