Abstract
The results of an investigation of structural fragments of the core of the destroyed reactor in the No. 4 unit of the Chernobyl nuclear power plant are analyzed. It is shown on the basis of investigations of the fission product distribution over the cross-section of the graphite blocks and the determination of the physical properties of graphite that the temperature of the graphite blocks, including the reflector, at the moment they were ejected from the core exceeded 1000°C. The heat content of the fuel was estimated on the basis of an analysis of fragments of the dispersed uranium dioxide particles and an analysis of possible graphite dispersal mechanisms at the moment of the explosion. It is shown that energy sufficient for dispersing and partial vaporization of the fuel and for dispersing the graphite could have been introduced into the fuel during the accident process. Analysis confirms the possibility of a core destruction scenario with ejection from the shaft and ejection of part of the fuel in the form of vapor and dispersed particles into the atmosphere.
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A. A. Abagyan, V. G. Asmolov, A. K. Gus’kova, et al., Accident at the Chernobyl Nuclear Power Plant and Its Consequences, Information prepared for the IAEA conference of experts held on August 25–29, 1986 in Vienna. Generalized Material of GKAÉ SSSR, Moscow (1986).
A. A. Borovoi and A. Yu. Gagarinskii, “Emission of radionuclides from the destroyed unit at the Chernobyl nuclear power plant,” At. Énerg., 90, No. 2, 137–145 (2001).
M. A. Abramov, V. I. Avdeev, E. O. Adamov, et al., RBMK Channel Power Reactor, edited by Yu. M. Cherkashov, NIKIÉT, Moscow (2006).
Yu. M. Cherkashov, O. Yu. Novosel’skii, and K. P. Checherov, “Investigation of the development of processes occurring during the accident at the Chernobyl nuclear power plant in 1986,” At. Énerg., 100, No. 4, 243–258 (2006).
A. N. Kiselev and K. P. Checherov, “Model of the process resulting in the destruction of the reactor in the No. 4 unit of the Chernobyl nuclear power plant,” At. Énerg., 91, No. 5, 425–434 (2001).
É. M. Pazukhin and S. A. Bogatov, “Model of the process resulting in the destruction of the reactor in the No. 4 unit of the Chernobyl nuclear power plant,” At. Énerg., 92, No. 5, 419–420 (2002).
O. Yu. Novosel’skii, Yu. M. Cherkashov, and K. P. Checherov, “Technical aspects of the accident in the No. 4 unit of the Chernobyl nuclear power plant,” Preprint NIKIÉT ET-05/70 (2005).
F. F. Zherdev, P. A. Platonov, V. I. Karpukhin, et al., Preliminary Estimate of the Temperature of the Graphite Blocks of the Reactor in the No. 4 Unit of the Chernobyl Nuclear Power Plant at the Initial Moments of the Accident, ORM IAÉ Report No. 3391, August 14, 1986.
Proceedings of the First International Working Group on Serious Accidents, Dagomus (1989), Nauka, Moscow (1996).
P. A. Platonov, “On the process resulting in the destruction of the core in the reactor of the No. 4 unit of the Chernobyl nuclear power plant (retrospective analysis of experiments and facts),” Preprint IAÉ-6486/11 (2007).
P. A. Platonov, E. I. Trofimchuk, O. K. Chugunov, et al., “Annealing of radiation damage in graphite,” Rad. Effects, 25, 105–110 (1975).
“Reasons for the accident in the Chernobyl nuclear power plant. Review of investigations performed over 10 years,” in: IAEA International Conference on the Chernobyl Accident — 10 Years Later, Vienna, Austria, April 1–3, 1996, pp. 46–83.
M. N. Babaitsev, E. V. Burlakov, and A. V. Krayushkin, “Analysis of the accident in the No. 4 unit of the Chernobyl nuclear power plant,” Preprint IAÉ-6416/4 (2006).
B. S. Rodchenkov and A. N. Semenov, “Mechanical properties of the alloy Zr-2.5%Nb at high temperatures,” in: Abstracts of Reports at the 2nd Russian Conference on Materials for Nuclear Technology, VNIINM, Moscow (2005), p. 23.
Takaharu Tsuruta, Masa-Aki, Ochiap, and Shinzo Saito, “Conversion ratio at rapid deposition of high energy in LWR fuels,” J. Nucl. Sci. Technol., 22, No. 9, 742–755 (1985).
É. V. Sobotovich, A. A. Val’ter, Yu. A. Ol’khovik, et al., “Solid radioactive fallout in the near zone of the Chernobyl nuclear power plant,” Trudy NAN Ukrainy, No. 8. 172–176 (1993).
S. E. Vyatkin, A. N. Deev, and V. G. Nagornyi, Nuclear Graphite, Atomizdat, Moscow (1967).
V. I. Barabanov and Yu. S. Virgil’ev, Radiation Strength of Structural Graphite, Atomizdat, Moscow (1976).
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Translated from Atomnaya Énergiya, Vol. 104, No. 6, pp. 319–328, June, 2008.
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Platonov, P.A., Krayushkin, A.V. Process resulting in the destruction of the No. 4 unit reactor at the Chernobyl nuclear power plant. At Energy 104, 417–427 (2008). https://doi.org/10.1007/s10512-008-9050-9
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DOI: https://doi.org/10.1007/s10512-008-9050-9