DHAKA: South Korea’s nuclear plant operator is to conduct drills testing its ability to withstand a cyber-attack, after a data leak and threats from a hacker.

Last week, designs and manuals of plant equipment owned by Korea Hydro and Nuclear Power Co (KHNP) were put online by an unknown individual or group.

A threat was made that unless three reactors were closed by Christmas, people should ‘stay away’ from them, reports BBC.

KHNP said the leaked data did not undermine the safety of the reactors.

KHNP, the sole nuclear operator in Korea, is part of the state-run utility Korea Electric Power Corp.

In a statement, the operator said it would conduct a series of large-scale drills at four nuclear power plant complexes on Monday and Tuesday.

BDST: 1032 HRS, DEC 22, 2014