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The Leibstadt Nuclear Power Station is equipped with a direct cycle boiling water reactor belonging to the General Electric BWR product line BWR/6. The MARK III containment system encloses the nuclear island. The nuclear system is provided with a 238-inch internal diameter vessel and the core is built up of 648 fuel elements and 84 control rods. Each fuel bundle consists of 62 fuel rods and 2 water rods in an 8 x 8 array. The rated power of the Leibstadt BWR is 3012 MWt and it is designed for a net power of 942 MWe.
The purpose of the test STP-2001 which occurred on 15 October 1984 was to demonstrate the capability of the Reactor Core Isolation Cooling (RCIC) system to maintain the reactor water level above level 1 (-337 cm) following a total loss of feedwater with the HPCS system unavailable. The test was initiated by tripping the two operating feedwater pumps. The HPCS was prevented from initiating automatically.
The analysis of off-normal events in actual nuclear plants can be particularly valuable with respect to scaling and simulation problems and with regard to thermal-hydraulic nuclear feedback.