- 222 - The other units of the facility are required for the general operation of the La Hague site, so they will be kept in operation: the central building including the central monitoring laboratory; the AD1/BDH unit for equipment decontamination; the STU unit for nitric acid storage. Station STE2-A (BNI 38) used to treat the low- and medium-level liquid radioactive effluents before discharging to the sea. At the end of the operational functioning, the facilities underwent rinsing and clean-out operations. Part of the facility is currently awaiting final shutdown and decommissioning, namely station STE2-A, building 128, building 119, silo 115, silo 130, and the pits and trenches in the North-West zone. The other units of the facility are required for the general operation of the La Hague site, so they will be kept in operation: The storage area of conditioned waste and very-low level (VLL) activity soils in the North-West; The ordinary industrial waste (DIB) sorting area; STE-V for treating "V" effluents and interim storage of filtration sludge; Building 116 for cementing the CBF-K packages. The ELAN II unit (BNI 47) was definitively shut down in 1977. Clean-out operations were carried out between 1980 and 1986. It is currently waiting for final shutdown and decommissioning. The HAO unit (BNI 80) carried out the first reprocessing operations on spent nuclear fuels based on UO2. The solutions resulting from this treatment were then transferred to the UP2-400 plant. The operating facilities have undergone dust removal or rinsing to reduce the residual source term. At present they still contain experimental reactor fuels (so-called "RTR" fuels) stored in pools, hull and endpiece waste stored in silos, and ion-exchange resins stored in silos pending processing. The unit is currently under decommissioning, with the exception of the North HAO section which is still in operation. The UP3-A plant (BNI 116) reprocesses the irradiated fuel assemblies coming from the light-water nuclear reactors and research reactors, and processes substances containing plutonium. The main operations carried out in this unit are: unloading of the transport containers and storage of the irradiated assemblies in pools; shearing of assemblies; dissolution of the sheared sections in nitric acid; clarification of the dissolution solutions; separation of the fission products into sub-critical annular pulse columns; separation of the uranium and plutonium in mixer-settlers followed by purification of the uranyl nitrate and plutonium nitrate, the latter being subsequently converted to plutonium oxide; storage of the uranyl nitrate and plutonium oxide pending their shipping; concentration of the fission products and the medium- and high-activity effluents; vitrification of fission products and actinides and conditioning them in packages; storage of the packages for cooling; compacting, conditioning and storage of waste from structures (hulls and endpieces). The UP2-800 plant (BNI 117) also reprocesses the spent fuel assemblies from light-water nuclear reactors and research reactors, and the treatment of material containing plutonium.
RkJQdWJsaXNoZXIy NjQ0NzU=