"We will not hesitate to stop the plant if we find that the mandatory safety requirements have not been taken care of at the site," said the bench while posting the case for further hearing on October 4.
The court earlier had refused to stay loading of the fuel in the plant but had agreed to examine the risk associated with the project.
The court was hearing an appeal by social activist G Sundarrajan against the Madras High Court's decision refusing to impose any restraint against the plant.
The petitioner contended that after last year's nuclear disaster in Fukushima in Japan, the Atomic Energy Regulation Board (AERB) had recommended 17 safety measures for the plant which have not been put in place.
It said till now only six safety measures have been adopted and the government will take two years to implement the rest of the recommendations.