Roughly 50 workers at Peach Bottom Atomic Power Station were exposed to low levels of radiation early Tuesday after a discharge of contaminated steam.
At 1 a.m. that morning, workers were
loosening a two-inch vent on top of the Unit 2 reactor vessel head when a
"puff" of radioactive steam escaped from a flange, said Neil Sheehan, a
spokesman for the U.S. Nuclear Regulatory Commission.
monitoring alarms sounded as workers, dressed in bright yellow
radiation-protection suits, hurried to close the vent. In total, the
length of the release lasted about 2 minutes.
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