Authors & Affiliations
Smykov V.B., Legkikh K.G.
A.I. Leypunsky Institute for Physics and Power Engineering, Obninsk, Russia
Legkikh K.G. – Head of Laboratory. Contacts: 1 Bondarenko Square, Obninsk, Kaluga Region, 249033. Tel.: +7 (484) 399-88-03; e-mail:
Smykov V.B. – Deputy Head of Department, Cand. Sci. (Tech.).
Abstract
The problem of washing large-sized equipment from alkali metal residues is especially relevant in preparation for decommissioning of BN-type RC. Taking into account the uneven accumulation of alkali metal inside the equipment (stagnant zones, filter gaskets, etc.), it is difficult to predict the course of the washing process with water technologies, as well as to ensure the fire and explosion safety of the process. Thanks to the long-term research conducted by the BR-10 employees, a method for neutralizing the non-controlled alkali metal residues in the equipment was developed. The method is based on the interaction of an alkali metal with a gas mixture, which is not accompanied by the release of water and a sharp increase in heat generation. The accumulated neutralization product is easily removed from the equipment by dilution, and the equipment itself is dried. This method allows you to safely remove the alkali metal from the equipment and transfer the equipment for long-term storage, or for decontamination and dismantling. To date, 10 spent CLOS of the first circuit and two drain tanks of the second circuit have been neutralized on the BR-10 IR. The developed method is of interest not only in Russia, but also abroad, for example, in Kazakhstan (BN-350), Japan (Monju), France (Rhapsody, Phoenix).
Keywords
fast neutron reactors, BR-10 IR, BN type RU, alkali metals, neutralization, non-drained alkali metal residues, CLO, gas mixture-reagent
Article Text (PDF, in Russian)
UDC 621.181.6
Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2022, no. 4, 4:13