Exelon Corp. plans to announce Friday it will terminate its contract with Wackenhut Corp. for providing security at many of its nuclear power plants, according to a notice the company sent to congressional offices.

A copy of the notice was obtained by The Associated Press.

On Thursday, the Nuclear Regulatory Commission directed operators of commercial nuclear power plants to provide it new information about their security practices after reports of recent lapses.

Exelon in September terminated its contract with Wackenhut for security at its Peach Bottom plant in south-central Pennsylvania after guards there were videotaped sleeping on the job.

Exelon has 17 reactors at 10 plants nationwide, including plants in Illinois, Pennsylvania and New Jersey. A company spokeswoman said an announcement was planned Friday afternoon.

Shawn Kirven, vice president of operations at Wackenhut, said Friday the company had not been notified that its contract had been terminated.