SCRIBA, N.Y. (AP) — A spokesman for the Nuclear Regulatory Commission says a sheen on Lake Ontario has been traced to a small oil spill from the Fitzpatrick Nuclear Power Plant.

Update: FitzPatrick nuclear plant, source of oil leak, was shut down suddenly Friday

The U.S. Coast Guard responded Sunday to a report of a sheen near the plant in Scriba, about 40 miles north of Syracuse.

Neil Sheehan of the NRC tells the Rochester Democrat and Chronicle (http://on.rocne.ws/292vHor ) that plant operator Entergy Corporation found the source of the oil on the roof of a turbine building.

Sheehan says it appears that 20-30 gallons of oil leaked from a vent for the hydrogen seal system and entered the lake through a discharge drain.

Sheehan says there was no adverse impact on plant operations.