caa a22 4500 39750361X CHVBK 20180308164538.0 cr unu---uuuuu 161202e19950401xx s 000 0 eng 10.1093/oxfordjournals.rpd.a082642 doi 0144-8420 pii (NATIONALLICENCE)oxford-10.1093/oxfordjournals.rpd.a082642 Analysis and Prognosis of Radiation Exposure Following the Accident at the Siberian Chemical Combine Tomsk-7 [Elektronische Daten] [V.M. Shershakov, S.M. Vakulovski, R.V. Borodin, O.I. Vozzhennikov, Ya.I. Gaziev, V.S. Kosykh, K.P. Makhon'ko, V.B. Chumiciev, A.T. Korsakov, V.P. Martynenko, A. Godko (INVITED)] On April 6 1993 at 12.58 at the radiochemical plant of the Siberian Chemical Combinat (Tomsk-7), a set-up for treatment of the uranium solution prior to extraction was damaged and part of the activity was released into the environment. The release occurred through the collapsed wall and then standard ventilation system. The paper presents results obtained by Roshydromet divisions in assessing the magnitude of the accident and predicting its consequences. The meteorological data suggested that the most probable direction of the radioactive trail was north-east, towards the village of Georgievka. The preliminary sampling allowed the radionuclide composition of the release to be identified as 103Ru, 106Ru, 95Zr, 95Nb and 239Pu. Based on the results of the aerial gamma survey conducted by specialists of Roshydromet and "Berezovgeologiya", an area of increased gamma background (>10 µR/hour) was outlined. In addition, measurements were made across the radioactive trial using equipment on vehicles. The activity release was estimated on the basis of the theoretical relationship between gamma dose and isotopic activity. By calculations, 720 Ci of activity was released into the environment. The criterium of correctness was the condition of minimum deviation of the calculated gamma field from the measured one. For calculation of 239Pu depositions, the relationship 239Pu/95Zr = (1-3.5) x 10-3 was used. Based on data of depositions and hydrological predictions, estimates were made for possible contamination of the Samus-ka and Tom' rivers due to the surface run-off of radionuclides from the catchment area. For the village of Georgievka, respiration individual dose was calculated which may result from wind resuspension and uplift of radioactive dust containing 239Pu. The paper also includes results of the actual aerial spectrometric gamma survey which confirm the preliminary estimates of the activity release. Radiation Protection Dosimetry Shershakov V.M. aut Vakulovski S.M. aut Borodin R.V. aut Vozzhennikov O.I. aut Gaziev Ya.I. aut Kosykh V.S. aut Makhon'ko K.P. aut Chumiciev V.B. aut Korsakov A.T. aut Martynenko V.P. aut Godko (INVITED) A. INVITED aut Radiation Protection Dosimetry Oxford University Press 59/2(1995-04-01), 93-126 0144-8420 59:2<93 1995 59 rpd https://doi.org/10.1093/oxfordjournals.rpd.a082642 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/oxfordjournals.rpd.a082642 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shershakov V.M. aut NATIONALLICENCE 700 1- Vakulovski S.M. aut NATIONALLICENCE 700 1- Borodin R.V. aut NATIONALLICENCE 700 1- Vozzhennikov O.I. aut NATIONALLICENCE 700 1- Gaziev Ya.I. aut NATIONALLICENCE 700 1- Kosykh V.S. aut NATIONALLICENCE 700 1- Makhon'ko K.P. aut NATIONALLICENCE 700 1- Chumiciev V.B. aut NATIONALLICENCE 700 1- Korsakov A.T. aut NATIONALLICENCE 700 1- Martynenko V.P. aut NATIONALLICENCE 700 1- Godko (INVITED) A. INVITED aut NATIONALLICENCE 773 0- Radiation Protection Dosimetry Oxford University Press 59/2(1995-04-01), 93-126 0144-8420 59:2<93 1995 59 rpd Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford