The Nuclear Safety and Security Commission in South Korea has granted approval for the restart of the Kori 4 reactor after a coolant leak shut the unit down in March of 2017.

The national regulator declared the reactor safe for a restart. In a brief statement, the commission said “We have confirmed there is nothing that could compromise safe operation of the reactor.”

Beyond repairing the leak, Korea Hydro and Nuclear Power Company, the plant operator, did a plant-wide inspection of similar welded components in the restart process, according to local media reports.

A plant spokesman Kwon Sang-bong said that the regulatory mandated 11 power up tests for the reactor to resume commercial operations. The restart, according to Yonhap news, is expected to take place over the weekend.