"U.S. authorities are investigating a cyber intrusion affecting multiple nuclear power generation sites this year, E&E News has learned.

There is no evidence that the nuclear energy industry's highly regulated safety systems were compromised. But any cybersecurity breach — targeted or not — at closely guarded U.S. nuclear reactors marks an escalation of hackers' probes into U.S. critical infrastructure.

Electricity-sector officials confirmed yesterday that they are working to unpack the significance of the secretive cyber event, code named 'Nuclear 17.'

Asked about the case, a representative from the North American Electric Reliability Corp. (NERC) said the nonprofit grid overseer 'is aware of an incident' and has shared information with its members through a secure portal."

Blake Sobczak and Peter Behr report for EnergyWire June 27, 2017. [2]