Sealing roofs of radioactive waste storage facilities and other radiation-hazardous facilities using polymer compositions

V. P. Povarov; V. S. Rosnovsky; A. V. Doroshenko; D. V. Chernishov; S. V. Rosnovsky; V. I. Zabolotniy; I. V. Zabolotniy; D. X. Kulev

doi:10.26583/gns-2025-02-08

Sealing roofs of radioactive waste storage facilities and other radiation-hazardous facilities using polymer compositions

V. P. Povarov, V. S. Rosnovsky, A. V. Doroshenko, D. V. Chernishov, S. V. Rosnovsky, V. I. Zabolotniy, I. V. Zabolotniy, D. X. Kulev

https://doi.org/10.26583/gns-2025-02-08

EDN: RLCJZU

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Abstract

The article considers the issue of the use of protective polymer coatings for the long-term protection of various surfaces from radioactive contamination at nuclear power plants and other radiation-hazardous facilities. The analysis of regulatory documents regulating the procedure to confirm newly developed technologies to safety requirements in the field of atomic energy use has been carried out. The paper shows the insufficiency of available solutions and the disadvantages of known polymer compositions, which negatively affect the possibility of their use of sealing roofs of near-surface radioactive waste storage facilities. An original technology of sealing the roof of the storage facility and a recipe to prepare a protective polymer composition has been developed and tested in the conditions of near-surface storage facilities for solid radioactive waste at the Novovoronezh NPP. The method of sealing the roofs of radioactive waste storage facilities and other radiation-hazardous facilities includes: pretreatment of the sealed surface by applying two protective layers of different compositions (the first layer is a primer–insulating, based on water-dispersion paint with localizing additives, the second layer is easily deactivated, based on nitro-epoxy enamel); coating the surface with a protective sealing composition EGAiB. To apply and form the first preparatory layer, a composition based on a water-dispersion paint with additives of carboxylic acid and piperazine is used. To form the second pretreatment layer, EP-51 type nitroepoxide enamel is used. EGAiB sealing composition based on epoxy resin of the VD EPEP-72 type, is used to form the main protective layer, glycidine ether of polyatomic alcohols serves as a modifier; paraffin chloride HP–110 is used as a flame retardant; tertiary aminophenol is used as a hardener; acetone is used as a solvent according to State Standard 2768-84. The test results confirmed high performance and the prospects for further research in this direction. Based on the results of tests and verification of the operational and technological properties of composite materials (based on PVB, epoxy resins), it was found that polymer compositions based on polyvinylbuteral and epoxy resins can be recommended for use on roofs with concrete-asphalt coatings of near-surface radwaste storages.