Diablo Canyon Power Plant operating at full power

POSTED: 04:12 PM PDT Jul 16, 2013    UPDATED: 07:59 AM PDT Jul 17, 2013 

Unit 2 at Pacific Gas and Electric Company's Diablo Canyon Power Plant returned to full power on Tuesday.

The unit safely went offline last week after an electrical disturbance.

An investigation revealed a flashover event happened during routine maintenance that involved pressure washing also known as "hot washing" of electrical insulators near the lightning arrester.

Sensing the disturbance, unit 2 automatically went offline to protect the equipment. Unit 1 was not affected.