At Moscow SIA “Radon” jointly with JSC “Alliance Gamma”, the technology for NPP Decanatate Treatment was developed, tested and realized at Kola NPP. This technology consists of dissolving the salt residue and subsequent treatment by ozonization, separation of the deposits formed from ozonization and selective cleaning by ferro-cyanide sorbents. The nonactive salt solution goes to an industrial waste disposal site or a repository specially developed at NPP sites for “exempt waste” products by IAEA classification. This technology was realized at Kola NPP in December 2006 year. At this time more than 1000 m3 of decantates log time stored are treated. It allows solving very old problem to empty decantates’ tanks at NPPs in environmentally safe manner and with high volume reduction factor.

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