372 



Yakut Republic Sanitation 

 and Epidemiology Station 



CONCLUSION 



on the of Radiochemical Analyses of 



Water Samples Collected by a Group of Specialists ttom 



the Coordination Council in the Mirny Rayon 



in July, 1990 



Water samples were collected in rivers used as sources of drinking water by 

 settlements located in the area and at the sites of underground atomic explosions in the 

 Mirny Rayon. 



The purpose of the laboratory investigation was to try to establish the possibility 

 of artificial (strontium-90 and cesiimi-137) and natural (uranium-238 and radium-226) 

 radionuclides entering natural waters as a result of explosions. The radiochemical 

 analysis was conducted in August of 1990 at the radiological laboratory of the Yakut 

 Republic Sanitation and Epidemiology Station using procedures approved by Chief State 

 Sanitary Physician PJ^. Burgasov on December 3, 1979. 



Radiometric apparatus of the UMF-1500 type and a scintillation alpha unit with a 

 BDA imit and photoelectric colorimeter, which passed state testing at the Far East 

 Center of Standardization and Metrology in July 1990, (as evidenced by the appropriate 

 documents) were used. 



-22- 



