PG&E cuts California Diablo Canyon 1 unit to 50 pct power

Reuters

Oct 15 (Reuters) - California power company PG&E Corp

said it reduced the 1,122-megawatt Unit 1 at the Diablo

Canyon nuclear power plant to 50 percent power on Monday to work

on a feedwater pump.

The company said in an email on Tuesday that it decided to

reduce Unit 1 after one of two main feedwater pumps

malfunctioned.

Feedwater pumps are part of the non-nuclear, steam side of

the plant. Their purpose is to increase the pressure of water

high enough to enter the steam generator.

PG&E said that in addition to the two main feedwater pumps,

there are three backup auxiliary feedwater pumps.

The company did not say when the unit would return to full

power.

Unit 2 continued to operate at full power, the company said.

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PLANT BACKGROUND/TIMELINE

STATE: California

COUNTY: San Luis Obispo County

TOWN: Avila Beach about 183 miles (294 km) northwest

of Los Angeles

OPERATOR: PG&E

OWNER(S): PG&E

CAPACITY: 2,240 MW

UNIT(S): 1 - 1,122 MW Westinghouse pressurized water reactor

2 - 1,118 MW Westinghouse pressurized water reactor

FUEL: Nuclear

DISPATCH: Baseload

TIMELINE:

1968 - Start of plant construction

1985 - Unit 1 enters commercial service

1986 - Unit 2 enters commercial service

2009 - PG&E files with NRC to renew original 40 year

operating licenses for 20 additional years

2024 - Unit 1 license to expire unless renewed

2025 - Unit 2 license to expire unless renewed

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