- 3 . - The measurement of body radiation by such analysis is very sensitive and requires complexelectronic equipment and personnel highly trained in electronics © from Brookhaven National Laboratory. 3. Personnel exposure to gamma radiation: Gamma levels on the island were derived from data furnished by other radiological survey groups. MONITORING DATA The results of the personnel monitoring data on people living at Bikini since 1969 are presented in the accompanying tables. analyses are presented on Table I, The data on urine Note that average pCi/liter for Bikini urine compared with Rongelap was for 90 “Sr 2.5/3.8 and for 13765 638/3360. Based on standard guide lines (International Congress of Radiation Protection ~ ICRP) these isotopes have been well below maximum permissible levels. assuring also is the virtual absence of plutonium in the samples. Re- Levels for internally absorbed 1376, as measured by spectrographic analyses are presented in Table 2. Note the average values for males and females on Bikini compared with those on Rongelap (in nCi/pg body weight) was 1.4/6.4, again well below the maximum permissible levels. cad 2 show that bedy burden (extrapolated) for The graphs in figures 1 905 and 3%c5 in the Bikini people are well below the peak values noted in the Rongelap people. The. Rongelap people reached a peak of 6-11% of the maximum 705, permissible level (for general populations) and of about 22% for 13706. These low values for internally absorbed radionuclides is in accord with the fact ‘that the people on Bikini have been subsisting mainly on imported foods. The contribution of gamma radiation to the people on Bikini is somewhat greater than on Rongelap. OTmayen RR eg Se Ga ys “ Lape 3 VA. a Mewes hee wed ewe ,