Taipei--The second reactor at Taiwan's Third Nuclear Power Plant, which shut down on Sunday after developing a problem with its cooling system, resumed operations Tuesday morning after getting the green light from the Atomic Energy Council (AEC).
The 951-megawatt reactor was generating 369.2 MW of power around noon as it continued to build up to its maximum load, according to state-run utility Taiwan Power Co. (Taipower), which operates the country's three nuclear power plants.
The AEC did not give Taipower the go-ahead to restart the reactor until late Monday after reviewing a second application to resume the reactor's operations.
Taipower's earlier application, submitted Monday morning after it fixed the cooling system problem late Sunday, was rejected by the AEC because it did not address some of the issues clearly enough.
According to Taipower, a breakdown in one of the reactor coolant pumps shut down the system. It was later determined that one of the pumps' power busbars was set too close to cable shielding wires, which caused an abnormal electrical discharge and tripped the system.
The reactor had been shut down in June for regular maintenance, but Taipower officials said the problem was not noticed at the time.
To ease the tight power supply, Taipower said it also began operating generators at its Dalin plant in Kaohsiung on Tuesday after their successful trial run the previous day. They were expected to generate some 100,000-200,000 kWs of electricity.
The company continued to flash an orange warning signal around noon, indicating that the operating reserve margin of Taiwan's electricity network had fallen below 6 percent.
Under the company's five-color supply warning system, an orange warning is followed by red and black warnings, which are issued when operating reserves fall below 900,000 kW and 500,000 kW, respectively. A black alert usually means that power rationing will be implemented.
A green light means operating reserves are above 10 percent of capacity, and a yellow warning is issued when reserves fall between 6 percent and 10 percent.
Source: Focus Taiwan News Channel