- 302 - FBFC The FBFC site is supplied with electricity by 2 external trains: One 20 kV line that is buried from the Pizançon dam (line dedicated to FBFC); One emergency 20 kV overhead line, coming from the Saint-Paul-lès-Romans substation. BNI 98 has the following on-site emergency power supply means: 3 fixed diesel generator sets with an autonomy of 24 hours: 2000 kVA generator set G05 in the U2 building, 1250 kVA generator set G07 situated near the U3 building, and 1250 kVA generator set G08 situated in building U1. It is possible to connect a mobile generator set to the electrical connection panel of each of these diesel generator sets if one of them should fail; 1 mobile generator set of 630 kVA, for which FBFC has a reservation contract with an outside company; Inverters, to provide the electricity necessary to place the facilities in safe condition in the event of loss of the BNI's off-site electrical power supplies (guaranteed autonomy of 10 mn): 2 inverters of 200 kVA each in AP2, 2 inverters of 200 kVA each in building U2, and 1 inverter of 40 kVA in building U3. The backed-up electrical power supplies of BNI 98 primarily supply: In building C1: the process ventilation; certain equipment items in building C1: pneumatic transfers of uranium powder, conversion ovens, Granex system, freight elevator, backup scrub column (for HF releases); In building AP2: the 2 general ventilation and process ventilation trains; the BTU sintering furnaces and their cooling circuit (including the cooling tower); In building R1: the ventilation; In the HF station: certain equipment items, including the ambient environment scrub column (scrubbing of HF releases); Building U1, which contains the inverters and the air compressors; The supply for the batteries of the criticality detection and alarm unit (EDAC); Safety equipment such as the breathable air supply, site fencing or gates; The process ventilation functions in the buildings not mentioned above. The backed-up electrical power supplies do not supply systems such as radiological monitoring, automatic fire detection (DAI, which has its own batteries), or the PPI (on-site emergency plan) sirens (which also have their own batteries). It must be pointed out that the earthquake resistance of the site's electrical power supplies - normal or emergency - is not guaranteed. Feared situations in the event of loss of the electrical power supplies In the event of loss of the normal or emergency electrical power supplies, production is stopped and the facilities are placed in a safe condition. The licensee waits for a normal electrical power supply to be restored to assess the state of the facilities and attempt to put them back into operation. In the event of total loss of the electrical power supplies: the fans stop. Containment of radioactive or hazardous materials is ensured by static containment (tanks, walls of rooms and buildings); the criticality monitoring mode is maintained, because it does not depend on an electrical power supply and is not linked to fail-safe components in the event of power supply loss (valves that close automatically, etc.);
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