en.Wedoany.com Reported - At 02:39 on April 19, Unit 3 of Qinshan Phase II successfully synchronized to the grid, marking the official conclusion of the 312 overhaul.

The 312 overhaul was a standard Class B overhaul with heavy workloads. It was completed as planned, including important tasks such as fuel replacement, primary circuit equipment inspection, comprehensive inspection of the turbine-generator set, comprehensive inspection of the generator circuit breaker, the five-year inspection of the emergency diesel generator, and new energy standard tests. Additionally, defect elimination work was carried out, including radiochemical treatment of the primary circuit, inspection of the inner pump casing screws of the charging pumps, inspection and replacement of the pressurizer electric heaters, and replacement of the diesel engine exhaust pipe gaskets. These efforts have laid a solid foundation for the safe and stable operation of the unit in the next cycle.

The 312 overhaul at Qinshan Phase II is the first major overhaul of the year for Qinshan Nuclear Power and also the opening battle for overhauls at the beginning of the "15th Five-Year Plan" period. During the preparation phase, the overhaul team meticulously implemented and fully prepared, conducting detailed discussions, analyses, and sandbox drills for major projects to ensure smooth connections and thorough attention to detail in every aspect of the project. During the implementation phase, all overhaul personnel anchored themselves to the "Seven Zeros" safety production goal. Each specialty carried out work in an orderly manner according to plan, with multiple main task lines advancing simultaneously. Under the forward command of the overhaul headquarters and the collaboration of various professional teams, they implemented overhaul responsibilities at all levels with a high sense of responsibility, safely, with high quality, and efficiently completing all established tasks, ensuring nuclear safety with "no room for error, absolutely no error."

Unit 3 of Qinshan Phase II will subsequently steadily increase power and complete related tests at various power platforms. It is expected to reach full power on April 21.

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