Aerosol emissions from the destroyed power-generating unit of the Chernobyl nuclear power plant in 1986 and 2003–2005
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Abstract
The results of measurements of the volume activity and dispersity of aerosol carriers of β-emitting radionuclides during the acute phase of the accident and 20 years later are presented. It is determined that in August–October 1986, when samples were taken 10–50 m from the surface of the destroyed reactor, the concentration was about 1 kBq/m3, which is 100–1000 times higher than the value recorded in July–August of the same year from an aircraft flying at altitudes 200–1000 m. Thus, already in mid-summer 1986, because of the decrease in temperature, the aerosol emissions did not reach the survey altitude of the aircraft. Therefore, the sampling performed from the aircraft did not permit a quantitative assessment of the emissions of radioactive materials during this period of time. In 2003–2005, the total β activity was 10–100 times less than in fall 1986, because of the radioactive decay of 95Zr, 95Nb, 103,106Ru, 134Cs, 141,144Ce, and other radionuclides. Since the 137Cs concentration decreased negligibly, it seems that the roof constructed in 1986 above the Shelter was of little use.
Keywords
Radon Nuclear Power Plant Thoron Aerosol Emission Chernobyl Nuclear Power PlantPreview
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References
- 1.Yu. A. Izraél’, S. M. Vakulovskii, V. A. Vetrov, et al., Chernobyl: Radioactive Contamination of the Environment, Gidrometeoizdat, Moscow (1990).Google Scholar
- 2.A. M. Matushchenko, “Radiation-survey aircraft,” in: Chernobyl: Catastrophe, Heroism, Lessons and Conclusions, Moscow (1996), pp. 436–456.Google Scholar
- 3.B. I. Ogorodnikov, “Trap for radioactive aerosols (Petryanov filters),” Énerg.: Ékonom., Tekh., Ékolog., No. 8, 34–39 (1998).Google Scholar
- 4.Yu. L. Dobrinin and P. V. Khramtsov, “Date verification meteorology and new data for Chernobyl source term,” Rad. Prot. Dosimetry, 50, No. 2–No. 4, 307–310 (1993).Google Scholar
- 5.Yu. I. Gavrilin, “Consequences of two scenarios of the development of the Chernobyl accident,” Byull. At. Énerg., No. 8, 20–28 (2001).Google Scholar
- 6.N. B. Borisov, V. V. Verbov, G. A. Kaurov, et al., “Composition and concentration of gas aerosol radioactive substances above the rubble of the reactor in the No. 4 unit of the Chernobyl nuclear power plant and in the far zone in May 1986,” in: Protection of the Environment, Questions of Ecology and Monitoring Production Quality, NIITÉKhIM, Moscow (1992), No. 1, pp. 11–17.Google Scholar
- 7.N. B. Borisov, B. I. Ogorodnikov, N. I. Kachanov, et al., “Observations of gas aerosol components of radioiodide and radioruthenium in the first few weeks after the Chernobyl accident,” ibid., pp. 17–24.Google Scholar
- 8.A. K. Budyka, B. I. Ogorodnikov, and V. I. Skitovich, “Evaluation of the aerosol particle size by means of three filters,” in: PARTEK-98. 7th European Symposium on Particle Characterization, Nurnberg, Germany, March 10–12, 1998, Prepr. III, pp. 1239–1245.Google Scholar
- 9.B. I. Ogorodnikov, “Radioactive products above the rubble of the reactor in the No. 4 unit of the Chernobyl nuclear power plant prior to the completion of the construction of the Sarcophagus,” in: Protection of the Environment, Questions of Ecology and Monitoring Production Quality, NIITÉKhIM, Moscow (1992), No. 1, pp. 36–53.Google Scholar
- 10.É. M. Pazukhin, “Lava-like fuel-containing masses of the No. 4 unit of the Chernobyl nuclear power plant: topography, physicochemical properties, formation scenarios,” Radiokhim., 36, No. 2, 97–142 (1994).Google Scholar
- 11.S. N. Nekrest’yanov, G. G. Leont’ev, V. B. Gaiko, and T. V. Krasnikova, “Development of the structure of the technical means of a system for monitoring the emissions of radioactive aerosols from the Shelter by the Industrial Association Chernobyl nuclear power plant through the Bypass,” NITI Report No. 5-96-1020, Sosnovyi Bor (1996).Google Scholar
- 12.B. I. Ogorodnikov, N. I. Pavlyuchenko, and É. M. Pazukhin, “Radioactive aerosols of the Shelter (Review). Part 2.2. Concentrations of radioactive aerosols on the industrial site of the Shelter,” IPB AÉS NAN Ukrainy Preprint No. 04-1, Chernobyl (2001).Google Scholar
- 13.V. A. Krasnov, A. P. Krinitsyn, B. I. Ogorodnikov, et al., “Assessment of the effect of the upgraded dust-suppression system on the radiation conditions inside the Shelter and on the surrounding environment,” Probl. Chorrnobilya, No. 15, 24–33 (2004).Google Scholar
- 14.B. I. Ogorodnikov, A. K. Budyka, and N. I. Pavlyuchenko, “Emission of radioactive aerosols from the Shelter in the presence of strong winds,” Radiats. Biolog. Radioéklog., 45, No. 2, 227–235 (2005).Google Scholar