1336 . FALLOUT FROM NUCLEAR WEAPONS TESTS 20 fold for etrontium’?. zine 65 was readily detected in samples from the March 1958 medical survey. The eetimated mean body burden at equilibrium for cesium? >? 1s about 1.5 microcuriea or about 1/6 of the tolerance recommended by the International Commission for Radiological Protection for non-industrial populations. For strouviua’? the mean body burden of the exposed Rongelap group in March 1958 was eatin .icd to be two millimicrocuries. This is about nine percent of the expected equilit:ium value of 23 millinicrocuries. {s about 1/5 of tolerance. Ronge> The estimated mean body burden of cine®? for Sirste fn March 1058 4s about &5 percent of the equilibration value scrocuries and the equilibration value is 1/70 of tolerance. ADNaas matinee of C.C The equilibrated strontium’? ‘vurden a EES rages Ok 505a441