Power plants affected by climate change
SEATTLE, Jun 4, 2012 -- UPI
Nuclear and coal-fired electrical plants are vulnerable to
climate change, U.S. researchers say, as water used to cool
their turbines is becoming too warm.
Several thermoelectric power plants in the United States and
Europe have had to operate at reduced electricity production or
even be shut down temporarily because of warmer water and
reduced river flows, the University of Washington reported
Sunday.
For instance, researchers said, the Browns Ferry Nuclear
Plant in Alabama was shut down more than once last summer
because the Tennessee River's water was too warm to use for
cooling.
Thermoelectric plants using nuclear or fossil fuels to heat
water into steam to turn turbines supply more than 90 percent of
U.S. electricity and three-quarters of European electricity.
They require consistent volumes of cooling water at a
particular temperature to prevent the turbines from overheating,
but increasing air temperatures associated with climate change
leading to warmer water mean higher electricity costs and less
reliability, researches said.
"This study suggests that our reliance on thermal cooling is
something that we're going to have to revisit," said researcher
Dennis Lettenmaier, a UW professor of civil and environmental
engineering.
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