TRANSURANIC RADIONUCLIDES IN ENEWETAK LAGOON 587 



Mean, 0.24 + 0.04 / 

 Range, 0.21-0.29/^ 



Fig, 5 Activity ratios of ^"^ Am/^^'"'"^'"'Pu in the surface sediments of Enewetak 

 lagoon. 



TABLE 1 Estimated Transuranic Sediment Inventory, Enewetak 

 and Bikini Atolls, Jan. 1, 1973 



2 3 9+240 



Pu 



'Pu 



Pu 



2 4 



Pu 



Pu 



Am 



Enewetak Atoll (area, 933 km^) 

 Areal activity to 2.5-cm depth, mCi/km^ 

 Total radioactivity to 2.5-cm depth, Ci 

 Total radioactivity to 16-cm depth, Ci 



Bikini Atoll (area, 629 km^) 

 Areal activity to 2.5-cm depth, mCi/km^ 

 Total radioactivity to 2.5-cm depth, Ci 

 Total radioactivity to 16-cm depth, Ci 



Total radioactivity due to global fallout 

 from weapons testing, January 1971, 

 kCi 



319 



22=" 



192 



127 



3,010 



72 



^Weapons, 8.6 kCi; faUout debris from SNAP 9A, 13.4 kCi. 



