368 



Strontium-90 and cesium-137 levels in average global fallout (background values) and in 

 some areas of the Chernobyl zone: 



1. Average global 

 fallout 



up to 0.2 up to 4-5 



up to 0.2 



up to 4-5 



2. Six km south- 

 east of the 

 Chernobyl 

 nuclear power 

 plant (near 

 Lake Kopachi) 



50-200 



up to 500-800 550-1100 



up to 4000- 

 6000 



3. 18 km south of 

 the nuclear 

 plant (near 

 Lake 

 Cherevach) 



8-20 



up to 100-600 10-30 



up to 150-300 



B.N. Fedorov 



Junior research associate, Institute of 

 Biology of the Yakut Scientific Center 

 of the USSR Acaden^ of Sciences 



-18- 



