Search - Number 20 - AEROSOLS AS EVIDENCES OF DESTRUCTION OF LAVA-LIKE FUEL CONTAINING MATERIALS IN THE “UKRYTTYA” OBJECT

AEROSOLS AS EVIDENCES OF DESTRUCTION OF LAVA-LIKE FUEL CONTAINING MATERIALS IN THE “UKRYTTYA” OBJECT
Cover not present AEROSOLS AS EVIDENCES OF DESTRUCTION  OF LAVA-LIKE FUEL CONTAINING MATERIALS IN THE “UKRYTTYA” OBJECT
Category: Number 20
Publication: 20
Summary

Radionuclide content, dispersity and concentrations of aerosols are presented in 2010 - 2011 years in Ukryttya object room 012/7. The samples were taken on Petryanov three-layer filters within 15 - 20 cm from LFCM southern side. Simultaneously, with using radon seismic station, radon and thoron content in the air was defined. It was stated that concentration of beta-radiating aerosol-carriers (90Sr + 90Y and 137Cs) was fluctuating with the range of 5 - 100 Bq/m3. Besides, 137Cs share made 10 - 20 %. Ratio of 137Cs/241Am concentrations was close to 15. Radionuclide carriers were aerosols of size more than1 µm. Maximum radon composition reached 100 - 300 Bq/m3. 212Pb concentrations - thoron daughter product were fluctuating within the range of 0,3 before 30 Bq/m3, and its carriers were the particles of diameter, prevailing, 0,1 - 0,3 µm. Gamma-spectrometric measurements and radiochemical analyses have demonstrated that content and ratio of radionuclides-products ChNPP Unit 4 accident in aerosol samples and LFCM specimens were, practically, identical. It testifies that LFCM destruction and particular transfer of materials in aerosol state occurs.

Keywords: "Ukryttya" object, lava-like fuel-containing materials, three-layer filters, radioactive aerosols, con-centration, dispersity, radionuclide ratios, radon, thoron.

REFERENCES
1. Bogatov S. A., Borovoi A. A., Evstratenko A.S., Kheruvimov A. N. Dynamic behavior of the fuel mass of "Shelter" encasement. - Kyiv: 1992. - 20. - (Prepr. / AS of Ukraine. V. M. Glushkov Institute of Cybernetics, 92-29). (Rus)
2. Bogatov S. A., Borovoy A. A., KiselevA. N. etc. Estimates of the rate of erosion of fuel mass inside the "Sarcopha-gus" and characteristics of the particles. - Moscow, 1991. - 21 p. - (Prepr. / I. V. Kurchatov Institute of Atomic Energy, 5434/3). (Rus)
3. Kuzmina, I. E., Tokarevskiy V. V. Aerosol particles dispersed phase "Shelter" // Problems of Chornobyl exclusion zone. - 1996. - Vyp. 4. - P. 141 - 150. (Rus)
4. Badovsky V. P., Kliuchnykov A. A., Kravchuk T. A. et al. Aerosol situation monitoring in some under-reactor pre-mises at object "Ukryttya". - Chornobyl, 2008. - 16 p. - (Prepr. / National Academy of Sciences of Ukraine. Insti-tute of Problems of NPP safety, 08-1). (Rus)
5. Pazukhin E. M. Lava fuel containing materials of the Chernobyl NPP unit 4: topography, physical-chemical properties, scenario of formation // Radiohimiya (Radiochemistry). – 1994. – Vol. 36, № 2. – P. 97 - 142. (Rus.)
6. Badovsky V. P., Kliuchnykov A. A., Kravchuk T. A. et al. Aerosol characteristic researching in basic fuel-containing at object "Ukryttya" // Problemy bezpeky atomnyh electrostantsiy i Chornobyly (Problems of nuclear power plants and of Chornobuyl). - 2009. - Iss. 12. - P. 103 – 11. (Rus)
7. Badovsky V. P., Kliuchykov A. A., Melenevsky A. E. et al. Estimating of surface LFCM in real conditions at object "Ukryttya" // Intern. Conf. "Twenty-five years after Chernobyl Accident. Safer for the Future." April 20 - 22, 2011, Kyiv, Ukraine: Reports proceeding. Conclusions and recommendations. - Part 2. - Kyiv, 2011. - P. 46 – 50. (Rus)
8. Melenevsky A. E., Ushakov I. A., Badovsky V. P. Research FCM dust generating ability of object "Ukryttya" // Problemy bezpeky atomnyh electrostantsiy i Chornobyly (Problems of nuclear power plants and of Chornobyl). - 2012. - Iss. 18. - P. 119 – 120. (Ukr)
9. Bar'yakhtar V. G., Gonchar V. V., Zhidkov A. V., Kliuchnykov A. A. About dust generating ability emergency power irradiated fuel and lava-like fuel materials of object "Ukryttya" - Chornobyl, 1997. – 20 p. - (Prepr. / National Academy of Sciences of Ukraine. Interdisciplinary Scientific and Technical Centre "Shelter"; 97-10). (Rus)
10. Zhidkov O. V., Gonchar V. V., Veklich A. L. et al. Experimental determination of morphology and genesis of dust particles generated by surface of irradiated nuclear fuel and lava-like fuel-containing materials of the "Shelter" ob-ject // Problemy Chornobyly (Problems of Chornobyl). - 2004. - Iss. 14. - P. 59 – 64. (Ukr)
11. Zhidkov O. V. Fuel-containing materials of "Shelter" object today: actual physical properties and facilities for their state prognosis creation // Problemy Chornobylya (Problems of Chornobyl). - 2001. - Iss. 7. - P. 23 - 40. (Rus)
12. Zhidkov O. V Study of the physical mechanisms of effects of internal and structural factors responsible for FCM degradation processes of the "Ukryttya" object during its conversation into an ecologically safe system / / Problemy bezpeky atomnyh electrostantsiy i Chornobyly (Problems of nuclear power plants and of Chornobuyl). - 2012. - Iss. 18. - P. 118 – 119. (Ukr)
13. Arutyunyan R. E., Bolshov L. A., Borovoi A. A. et al. Nuclear fuel in the "Shelter" object. - Moskva: MAIK "Nauka / Interperiodica", 2011. (Rus) 14. "Ukryttya" object: 1986 - 2011. On the way to conversation: monograph / A. A. Kliuchnykov, V. A. Krasnov, V. M. Rudko, V. N. Scherbin. - Chornobyl: Institute of Problems of NPP safety 2011. – 288. (Rus)
15. Radon seismic station CPC-05. Operating manual. - Moskva: Instrument company "NTM-zaschita", 2009. – 20. (Rus)
16. Afonin A. A., Kotlyarov A. A., Maksimov A. Y. Research unit of the properties of the air transport 218Po // Pribori i tekhnika eksperimenta (Instruments and Experimental Techniques). - 2010. - № 1. - P. 139 - 143.
17. Khan V. E., Ogorodnikov B. I., Kalinovskiy A. K., Krasnov V. A. Control of releases of radioactive aerosols from "Ukryttya" object in 2011 // Problemy bezpeky atomnyh electrostantsiy i Chornobyly (Problems of nuclear power plants and of Chornobuyl). - 2012. - Iss. 19. - P. 94 – 103. (Rus)
18. Ogorodnikov B. I., Khan V. E., Pazukhin E. M., Krasnov V. A. Radon and its daughter products in "Ukryttya" ob-ject in 2003 – 2010 // Problemy bezpeky atomnyh electrostantsiy i Chornobyly (Problems of nuclear power plants and of Chornobuyl). - 2012. - Iss. 16. - P. 130 – 136. (Rus)
19. Ogorodnikov B. I., Budyka A K., Khan V. E. et al. 220Rn as an additional factor of radiation hazard in the Shelter // Radiohimiya (Radiochemistry). – 2009. – Vol. 51, № 4. – P. 344 - 352. (Rus.)
20. Budyka A K., Ogorodnikov B I., Skitovich V.I. Filter pack technique for determination of aerosol particle sizes // J. of Aerosol Sci. – 1993. – Vol. 24. – Suppl. 1. – P. S205 – S206.
21. Khan V. E., Ogorodnikov B. I., Kalinovskiy A. K., Krasnov V. A. Control of releases of radioactive aerosols from "Ukryttya" object in 2010 // Problemy bezpeky atomnyh electrostantsiy i Chornobyly (Problems of nuclear power plants and of Chornobuyl). - 2011. - Iss. 17. - P. 98 – 105. (Rus)
22. Ogorodnikov B. I., Pazukhin E. M., Kliuchnykov A. A. Radioactive aerosols of the Shelter: 1986 - 2006 years. Mo-nograph. – Chornobyl: National Academy of Sciences of Ukraine. Institute of Problems of NPP safety, 2008. - 456. (Rus)

Full text