LOWER ALLOWAYS CREEK, N.J. (AP) -- Two of the three nuclear reactors in a southern New Jersey county have powered partway down because debris from Hurricane Irene is blocking cooling water intakes.

PSEG Nuclear spokesman Joe Delmar said Wednesday that the Salem I and Salem II units in Salem County are getting unusual amounts of grass and trash at the screen where water is taken in from the Delaware River. He says similar issues happen in the spring when the river runs high and weeds and grasses growing nearby are washed downstream.

He says the Salem I unit is running at 62 percent of full power and Salem II is at 90 percent. The adjacent Hope Creek reactor hasn't been affected.

Delmar says it's unclear when the plants will return to full power.