STUDIES ON PHYSICAL CHEMICAL PROCESSES IN THE SARCOPHAGUS

S. I. Azarov, Alexander Taranovsky, Vladimir Sugakov

Abstract


Analysis of. physical processes that may cause the fragility and destruction of the lava-like fuel containing materials (FCM) of 4-th unit of Chernobyl Nuclear Plant (ChNP) has been carried out. The following processes are considered: influence of electric fields arising in medium with incorporated radio-nuclides, the role of the defect creation by irradiation of incorporated nuclides, residual mechanical strains caused by their cooling from the melting temperature in the time of the accident to the ambient temperature at present.

It is shown that mechanical strains of such kind might be one of the causes of degradation and destruction of fuel containing materials.

Different structure modifications of radiolysis hydrogen sources are discussed. Basic radionuclide’s, being in the Sarcophagus premises - α, β- and γ- radiations are taken into account. It is shown, that the p-irradiators (Cs-137 and Sr-90) bring in generating of hydrogen the cardinal contribution. In dependence of nuclear spent material disparity, soluble forms of radionuclide’s concentrations, moisture saturation degree of fuel containing materials and water quality the account of hydrogen yield rate is presented. The estimations of the safe content of radiolysis hydrogen in the „Sarcophagus" premises air in hermetic and interchange of air degree are offered.


Keywords


hydrogen sources, Sarcophagus premises, explosion proof operation, safety provision

References


Radiolysis of water in “Sarcophagus” / S.I. Azarov // ( Preprint KIRN – 98-5),1998- 23p.

Data on the physicochemical proccesses ossurrsng in “Sarcophagus” // Kiev.( Preprint KIRN – 98-7),1998- 30p.

Formation of radiolytic hydrogen in placement 001/ 3 of the object “Ukryttya” / M.I.Panasyuk, G.V. Levin, S.A.Kobakehi et al // Problems of nuclear rower plants safety and of Chernobyl, vol-12 2009. pp.137 – 142 (in Russian)

Statistical theory of diffusion radionuclides in the ground and underground water / I.R. Yukhnovskii, M.V. Tokarechuk, I.P. Omelyan et al //Preprint ICMP – 7E, 1994. – 20p.

Chernobyl accident / Edited by V.G. Baryakhtar Kiev, Naukova Dumka, 1995.- 560p. (in Russian)

I.R. Yukhnovskii, M.V. Tokarechuk The problems of the 4-th powerblok of Chernobyl NPS// (Preprint ICMP-95-3U), Lviv, 1999.-40p.

Simulation of physical properties of fuel containing materials / I.I.Fishchuk et al // Cond. Matt. Phys., 1997, №12.-pp.27-36.

E.M. Pazukhin Lava-like fuel containing masses of 4-th block of Chernobyl nuclear plant: topography, physicfl-chemistry properties, the formation script // Radiochemistry, 1994, vol.36, No-2, pp.97-142. (in Russian)

A.P. Silin, A.N.Nrukhin Point defects and elementary excitation of the crystal and glass-like SiO2 / Riga, Zinatne, 1985.- 201p. (in Russian)

Gas eliminating determination by polymer matirials location in the “Ukryttya” unit / S.I. Azarov // Ssientific papers of the Institute for nuclear research, Kiev, 2001, №62 (4) – pp. 101-106 (in Russian)

Pikaev A.K., Kabakchi S.A., Makarov I.E. Hightemperature radiolysis of water and agueus solutions – Energoatomirdot , Moscow, 1988.-232p. (in Russian)

On the description of structural distribution and diffusion of radioactive elements in the system “glassy” nuclear magma –water / I.R. Yukhnovskii, M.V. Tokarechuk ,I.P. Omelyan et al // Cond. Matt. Phys., 1977.-№9.- pp.153-166.

Fire alarm, examining the Chernobyl Sarcophagus /ST. Azarov, V.V. Tokarevsky// Nucl. Eng. int. Vol. 40, № 401,1995, p. 38-39.

The main concertione of fire warning systems in Nuclear Power Plant / S.I. Azarov, V.V. Tokarevsry//( Preprint KINR-90-8), 1990.-12p.

Early warning system on fire prevention in NPP /S.I. Azarov, V.V. Tokarevsry// (Preprint KINR-91-30), 1991.-24p.


Full Text: PDF

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.

"No endorsement" policy: Unless explicitly stated otherwise, the opinions, analyses, discussions, views and recommendations outlined in the articles published in the International Nuclear Safety Journal (INSJ) are solely those of their respective authors and not of the editors, owners or publishers of the INSJ.