Data taken on a commercial CIC were compared with commercial log-average-magnitude-squared (LAMS) units operating off fission counters in the EBR-2 shutdown gamma field of about 2 X 10s R/hr. The resulting curves, shown in Figs 5.26 and 5.27, are multivalued on the ordinate to emphasize the overlap As shown, the overlap for the CIC is only a factor of 2 compared to the overlap of

the Gulf General Atomic counters of 100 If a true LRMS system had been used, the overlap would be the same or greater The improvement over a CIC is evident

Had the gamma field been more intense, the CIC overlap would be ml but the LAMS or log mean square voltage would still be 150. Table 5 2 shows comparative values of the discrimination ratio for the various systems

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