In post US nuclear regulator hacked several times over three years. from 19 August 2014 Warwick Ashford talks about attacks on the U.S. Nuclear Regulatory Commission (NRC).
The big question is: What makes the NRC so interesting for attackers? Reports of safety audits containing information that should not be made public? I really doubt it.
In Exclusive: Nuke Regulator Hacked by Suspected Foreign Powers you get an idea about the real reasons:
‘Federal systems are constantly probed by hackers, but those intrusions are not always successful.’
Thank goodness this is absolutely correct! In nuclear power plants very old IT technology is used that can not be attacked easily. But the detailed description of vulnerabilities found in audit reports will make successful attacks more likely.
Perhaps you remember the film ‘War Games’? Although the Maximum Credible Accident in a nuclear power plant is not comparable to a nuclear world war, the impact on health and environment is catastrophic. Therefore such events must be taken extremely serious.
By the way, the statement above talks about the known attacks on federal systems. The total number of successful attacks may be much higher …