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radioactive waste from industries in the republic, which was 

 carried out until now in the Khabarovsk region. 



Head of the Inspection of Radioactive Security, 

 Yakutsk Region 

 Gosortechnadzor RSFSR 



A. S. Tsyganov 



PRELIMINARY DATA ON RADIOACTIVE POLLUTION 

 NOVOSIBIRSK KRASNOYARSK 



In the Altaysk region, due to its geographic location in 

 southwestern Siberia very close to China and Kazakhstan, 

 radioactive pollution in the area is of substantial concern. The 

 following sources contribute to the radioactive pollution of the 

 environment: a series of large nuclear explosions conducted on 

 the Semipalatinsk test site and in China, the accident at the 

 Chirnobyl atomic power plant, testing of atomic weapons on Novaya 

 Zemlya, products from the burning of organic fuels tn boilers and 

 TETs (thermo-electric stations?) , raising of ash dust and also 

 source of radioactivity of natural origin. 



Radioactive contamination of the soil on the territory of 

 Altaysk results mainly from the accumulation over many years of 

 atmospheric fallout from long-lived strontium-90 and cesium-137, 

 thrown into the atmosphere during the testing of nuclear weapons. 

 In addition, mineral enrichment gradually introduced directly 

 into the soil is another substantial source of radioactive 

 contamination. Contamination of the surface water results from 

 the runoff of Btrontium-90 from atmospheric fallout onto the 

 surface of the soil. 



In the Novasibirsk region radiometric analysis of 

 atmospheric-fallout samples (monthly data from the Center for 

 Observation of Pollution of the Natural Environment) has shown 

 that the density of the fallout during 1990-1991 did not exceed 

 the established control value of 110 Bk/m2 of total beta-active 

 radiation during a day and averaged 0.7 BK/m-2 in the Novasibirsk 

 region. In areas where radioactive contamination is continuously 

 recorded, average values dn the density of fallout are as 

 follows: Bolotnoe and Karasuk, 0.8±0.5 Bk/m-2 each, Barabinsk 

 1.0+0.4 Bk/m2, Novosibirsk 1.5±0.7 Bk/m-2 and Ogurtsogo 1.4+0.7 

 Bk/m-2. The maximum radioactive fallout was the following: 

 Barabinsk 6.3 Bk/n-2, Novosibirsk 10.0 Bk/m-2, Ogurtsogo 18.5 

 Bk/m-2 . 



Radioactivity in the atmospheric layer next to the ground 

 resulted from fallout from the stratosphere of the productir«tr of 

 the radioactive decay from materials produced by nuclear testing 

 done during previous years. Most of the radioactive 

 contamination is caused by the presence of such materials as 

 cesium-137 and in a series of cases, contamination of soil by 



