At 10:03 on February 6th, the Qinshan Second Nuclear Power Plant's unit 4 participated in the maintenance by our company's unit was successfully connected to the grid, marking the successful completion of the third refueling and overhaul of unit 4, and the unit will complete the related equipment inspection and The test is expected to reach full power on February 10.
Since the refueling overhaul (403 overhaul) started at 2:17 on January 5th, it took a total of 32.3 days and completed 6,347 items of various tasks. On the basis of the annual refueling overhaul, the high-pressure cylinder disassembly inspection was also completed. Major projects such as inspection of low-pressure cylinder blades of steam turbines, disassembly and repair of waste heat exhaust valves, comprehensive inspection of main steam valves, and reconstruction of additional water pipelines under the high-pressure drainage expansion vessel.
In order to cooperate with the completion of this overhaul, our company carefully prepared and actively organized, and deployed more than 60 people from various nuclear power projects to participate in this overhaul. There are maintenance support, maintenance, safety and quality, and technology management offices in relevant departments. , Technology 2 and other related offices. The overhaul team participated in the completion of a number of overhaul contracting projects, with positions including mechanical inspection, instrument inspection, electrical inspection, safety supervision, industrial safety management, performance testing, corrosion protection management, lifting (driving) snatching, warehouse management, etc. .