...regulatory systems, the plant's owner CEZ said.
It said it would restart the reactor and reconnect it to the power grid on Sunday evening provided the test succeeds.
CEZ operates two 1,000-megawatt reactors at Temelin, which is located near the Austrian border in south of the country.
The Unit 2 was idle to allow for a regular fuel exchange.
Temelin is the biggest asset of state-owned CEZ, Europe's second largest power exporter after France's EDF . It accounts for 16 percent of CEZ's installed domestic capacity.
[PRAGUE/Reuters/Finance.cz]