"We are reviewing the safety aspects of Unit 1 at Kudankulam as directed by the Supreme Court," an AERB official said.
On May 6, the Supreme Court had cleared hurdles in commissioning of the first 1,000 MW nuclear power plant of the Indo-Russian project, saying the safety and security requirements have been taken care of.
At the same time, it spelt out 15 directions on ensuring safety at the nuclear facility as well as handling of spent fuel among others.
Officials said most of the safety features of the plant were found to be satisfactory during the ongoing review process and the regulator was leaving no stone unturned to ensure that the apex court directions were fully met with.
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They said the AERB would grant clearance for first approach to criticality only after ensuring that NPCIL has adhered to all the safety measures incorporated in the plant.
It also asked the NPCIL and AERB to maintain constant vigil and carry out inspection of the plant at least once in three months and rectify forthwith defects, if any.