LMFR, primary system

Primary system. The LMFR primary system is designed to re-mo e u]) to 825 Mw of heat from the reactor. The primary system consists of six separate heat transport loops. 

Reactor maintainability. The reactor plant operating experience has demonstrated quite acceptable maintainability of the integral LMFR. There have been no additional difficulties in repairing primary system components on BN-600 compared with BN-350. Repairs of the reactor equipment items and sodium systems, including such complicated operations as replacement of the reactor coolant pumps and SG modules, re-arrangement and jacketing of primary sodium systems, extraction of distorted items from the reactor core, etc. had virtually no influence on the duration of planned outages, which were defined, as a rule, by inspections and preventive maintenance of the steam-water system components. 

Primary inert gas system. Inert gas is used in the LMFR primary sy>toin to cover all free liquid metal surfaces and to provide a gas seal within the pumps. 

This survey has enabled us to assess how the CEA has dealt with its inactive sodium loop decommissioning. Furthermore, it has permitted an extrapolation to active systems. The comparative assessment of cutting techniques and processes has put forward a primary selection of the best technologies to be used in future LMFR decommissioning. 

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