The whistle-blower who lost his job during the investigation of sleeping guards at Peach Bottom nuclear power plant has demanded federal officials take another look at his concerns and resulting dismissal.

Attorneys for former security guard Kerry Beal sent Dale Klein, the Nuclear Regulatory Commission chairman, a four-page letter complaining that the NRC had not thoroughly and independently investigated claims that guards had been sleeping at posts at the Peach Bottom Atomic Power Station, six miles north of the Maryland border in Pennsylvania.