Objectives
As part of the Tacis 1997 nuclear safety assistance programme for Ukraine, it was decided to procure urgently needed spare parts required for the maintenance and repair of foreign supplied equipment that had been installed at Zaporozhe nuclear power plant in the past. The NPP operator, together with the On-Site Assistance Consultant prepared a list of urgently needed spare parts and these were divided into 9 lots:
U1.03/97A1: Electric motors for valve drives.
U1.03/97A2: Electric drives and worm gears for isolation valves.
U1.03/97A3: Spares for shut-off butterfly valves (drive shaft, shaft neck, binding shells and other parts).
U1.03/97A4: Spares for pressuriser safety valves (bearing shells, studs, bolts and other parts).
U1.03/97A5: Spares for check valves (gaskets, bushes, studs and other parts).
U1.03/97A6: Spares for safety valves (bellows, slide valves, needle bearings and other parts).
U1.03/97A7: Spares for hydraulic shock absorbers (piston seals, support bearings and other parts).
U1.03/97A8: Spares for safety system pumps (rotors, bearings, oil cooler and other parts).
U1.03/97A9: Spare parts for the emergency power supply (gaskets, bushes, studs and other parts).
Based on a market review, it was decided to contract lots A1 to A8 by direct agreement with the original equipment suppliers and to contract lot A9 by open tendering.
Following review of the cost estimates provided by the original equipment manufacturers, the budget available for the project, and the priority list established by the NPP operator, it was decided not to proceed with lot A1 in the framework of Tacis. Lot A9 was reprogrammed in the Tacis 2003 programme with increased scope and budget (see U1.03/03A9). The other 7 lots (A2 – A8) were contracted by direct agreement with the original equipment suppliers.
Project Results
This contract is for Lot A4: Spares for pressuriser safety valves (bearing shells, studs, bolts and other parts). It was contracted with the company Sempell and the equipment was manufactured and delivered between July 2001 and April 2002. The spare parts were installed on the pressuriser pilot-operated safety valves at Units 1, 2 and 3 during the scheduled maintenance outages between July and December 2002.