Publication Laka-library:
Subject maps. Ecosystem of Chelyabinsk Region territory. Instalment 2. Radiation situation on the territory subjected to Mayak PA influence (1995)
| Author | Adm. of Chelyabinsk Region |
| Date | 1995 |
| Classification | 2.34.8.80/12 (RUSSIA - MAYAK/CHELYABINSK (incl. Disaster Kyshtym Urals 1957)) |
| Front | 
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From the publication:
The Common radiation situation in the region As a result of the operation of the first Soviet plutonium production facility, transformed later into "Mayak" PA, large volume of radioactive waste was discharged into the environment. Radioactive discharges caused a difficult environment situation at the large territory in South Ural. Following information on the levels on environmental radioactive contamination was picked up from reports of "Mayak" PA and it's institutions (Experimental Scientific Station and Environmental Protection Laboratory) and documents of a commission, organized by Presidium of the Academy of Science of the USSR and expert group of Planning Ministry of Soviet Government, based on it's visit of "Mayak" PA. Form 1949 to 1951 Mayak PA discharged about 2.76 millions Ci of liquid radioactive waste in opened hydrographical system of Techa-Iset-Tobol rivers. As result of damming of Techa river in 1956 release of liquid radioactive waste was reduced up to 0.5 Ci/day. In 1963 an additional dam was built, that allowed to isolate Mayak PA hydrotechnical objects to the great extent. Assanov mash with 30 km2 area below the pond number 11 dam contains about 6000 Ci ofstrocium-90 and caesium-137. Assanov mash is the continuous opened source of release of radioactivity in the Techa river. The Lake Karachai contains about 120 millions Ci of radioactive waste. Staroye boloto contains about 200000 Ci of radioactive waste.
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