ett ee + a antiRRO occurring radionuclides to identify radionuclides in the gamma spectra. radionuclides based It on also generates those spectra the radionuclides were present from any observed photopeak an upper regions limit where amount signals in detectable quantities. of would specific be Listed seen if in Table 1 are the detection limit values for various radionuclides based on the average weight of tissue shown for a counting period of 1000 min. fish bone sample for example, 3766 would not have For an average-size been detected by spectrometry if the concentration was less than 11 pCi/kg dry weight. at Bikini and Enewetak, 40, detected 13766 and in gamma Except the only radionuclides other than naturally occuring fish and occasionally clam 6000. muscle In tissue muscle by gamma tissue, all spectrometry other were radionuclides indicated in Table 1 were below the limits of detection by gamma spectrometry. A more complete description of the gamma equipment used, calibration, sensitivity of detection, uncertainties, and methods for setting upper limits is given in Ref. 9. After gamma laboratory 13766, or analysis retained 238,239,240, the at LLNL and from muscle for dose tissue for either Except for spectrometry and are assessment. and were analyzed sent radiochemical 241an, cannot be detected by gamma significance samples The 1376, to confirm a separations 13766, judged was the to contract of these to be nuclides of potential radiochemically méasurements 905, separated made by gamma spectrometry, which in turn provided a useful interlaboratory calibration for quality control. Separation techniques used at LLNL are published ! and those used by the contract laboratory are summarized in Ref. 9. A number of duplicate, the samples blank, analyzed quality-control analytical and at standard LLNL results performance and for was samples at the the were contract marine extremely intermingled good. laboratory. samples A with All demonstrated full discussion regular available that of all the the quality control data for the 1978 survey results is in preparation. DOSE ASSESSMENT METHODOLOGY An For a abbreviated more description detailed of discussion, the the dose assessment recent reassessment of Enewetak Atoll may be consulted. !? report methodology on the follows. radiological