Jellyfish-like Creatures Force Shutdown of Diablo Canyon Unit 2 Reactor

PG&E has shut down the Unit 2 reactor at Diablo Canyon Power Plant due to an infestation of small jellyfish-like creatures called sea salp.

The company stated in a release that it will not restart the unit until conditions improve at the intake structure - which is currently clogged with the creatures.

Operators manually started the auxiliary feedwater pumps in accordance with the plant operating procedures. All systems operated as designed and no unexpected equipment performance issues were noted.

The shutdown leaves Diablo Canyon without power, as the plant's Unit 1 reactor was taken offline two days ago for scheduled repairs.