Summary Report for Conduct of Kozloduy NPP Stress Tests

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“Kozloduy NPP” PLC SUMMARY REPORT for Conduct of Kozloduy NPP Stress Tests 1.2 MAIN DATA FOR UNITS 3 AND 4 1.2.1 Key Features of Units 3 and 4 1.2.1.1 Type of Reactor Units 3 and 4 of Kozloduy NPP are water-water pressurized reactor, type VVER-440, upgraded design 230, with two circuits – primary (radioactive) and secondary (conventional) [16], [17]. 1.2.1.2 Thermal power The thermal power of the reactors is 1375 МW, primary circuit pressure is 12,3 MPa and the secondary - 4,4 Mpa. 1.2.1.3 First criticality date The first criticality date is December 4, 1980 for Unit 3 and April 25, 1982 for Unit 4. Additional information for the units is provided in the table below: Table 1.2-1: Historical date for Units 3 and 4. Characteristics Unit 3 Unit 4 Start of construction October 1973 October 1973 First criticality 4 December 1980 25 April 1982 Reaching 100% power 27.01.1981 17.06.1982 Fuel campaigns operated 22 21 Final shutdown for decommissioning 31 December 2006 31 December 2006 1.2.1.4 Fuel Storage Pond SFP is for spent and irradiated nuclear fuel (Figure 1.2-1). The pool is made of concrete structure lined with stainless steel, separated from the partition of two compartments – area containing the racks and the universal slot for intermediate location of fresh or spent nuclear fuel container. The mobile steel covers – 50 mm thick hatches – ensure additional protection of the pools. The spent fuel remains in the SFP for at least three years to reduce decay heat to the permissible limits allowing for their transportation. 17/202
“Kozloduy NPP” PLC SUMMARY REPORT for Conduct of Kozloduy NPP Stress Tests Figure 1.2-1: SFP of units 3 and 4 Vaporized Cooling to Atmosphere Spray Pool Spend Fuel Tank Heat exchanger Pump Pump Spend Fuel tank Cooling Service Water Group A From Danube River (Cold Canal) to the Cold Canal Spray Pool Heat exchanger Pump Spend Fuel tank Cooling Pump Service Water Group A From Danube River (Cold Canal) to the Cold Canal 18/202
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Summary Report for Conduct of Kozloduy NPP Stress Tests

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