The extension of orders comes a day after approval by the Atomic Energy Regulatory Board (AERB) to load fuel in the first reactor of the plant, mired in controversy due to opposition from anti-nuclear activists.
"It has come to (our) knowledge that anti-social elements and rioters could assemble in the area and that anti-nuclear activists and those associated with them could cause unrest and disturb public peace, besides indulging in anti-social activities," a statement from the office of the Collector of Tirunelveli district, where Kudankulam is located, said.
To prevent disturbance to general peace, ensure safety of the power generation plant and prevent any riots, the orders imposed two months back in a two km radius around KNPP were being extended till 6 PM of September 10, it said.
Accordingly, the prohibitory orders would be in force around seven km from the nuclear power station.
On Friday, AERB had at the end of a final review meeting with Nuclear Power Corporation of India Limited in Mumbai, given the go ahead for loading fuel in the first reactor.
The commissioning of the first of the 2x1000 MWe units of the Indo-Russian project was slated for December last year, but continuing protests by local people on grounds of safety concerns has delayed it.