Abstract

Leaching of radionuclides produced in soil and rock by high energy proton-induced radiation was studied for the SCC and CEBAF sites. Comparison was made with predictions of a Monte-Carlo code CASIM and previous results for the Fermilab site. The principal long-lived radionuclides were {sup 3}H and {sup 22}Na in agreement with Fermilab results. A few other radionuclides were present at lower concentrations in a subset of the samples. For example, {sup 134}Cs was detected in a few SSC water samples and {sup 7}Be and {sup 54}Mn were present at higher concentrations in a CEBAF sample. Leaching from SSC chalk was dependent on previous weathering and on leaching time. The more soil-like marl and shale were leached more rapidly. Results of this study in conjunction with the SSC ground-water model show that adequate ground-water protection would result for loss of the entire proton beam in the SSC Collider tunnel.

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