Cracked Steam Generator Tubes at San Onofre

by Dave Lochbaum - allthingsnuclear.org - March 27, 2012

Leaks in San Onofre Unit 3 and Unit 2:

On February 18, 2011, operators restarted the Unit 3 pressurized water reactor (PWR) at the San Onofre nuclear plant in southern California following its sixteenth refueling outage. During the outage, workers replaced both of the reactor’s steam generators, which are large cylindrical containers that are partially filled with water.

At 3:05 pm on January 31, 2012 – less than a year later – radiation alarms alerted the control room operators that water was leaking through one or more of the tubes in one of the steam generators on Unit 3. They estimated the leak rate to be 82 gallons per day.

(READ COMPLETE ARTICLE)