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Hot weather threatens cooling canals at Turkey Point via Miami Herald

Rising water temperatures and severe algae blooms in cooling canals have threatened to force the shutdown of two nuclear reactors at Florida Power & Light’s Turkey Point plant over the last few weeks.

The utility and federal regulators say there isn’t a public safety risk but the canal temperatures, climbing to 94 to 99 degrees, have come within one degree of a federal limit that would mandate an expensive shutdown at a time when power demands are soaring. The hot water has also stoked the spread of algae through the 168-mile long canal system, which has helped keep temperatures high and reignited concerns about the power plant’s impact on water quality in Biscayne Bay.

In a letter last month to state regulators, the company asked to control the algae with herbicides and to cool the canals with daily injections of millions of gallons from an underground reservoir that supplies Miami-Dade County’s drinking water — requests that drew questions from Biscayne National Park and environmentalists. FPL has also asked the Nuclear Regulatory Commission to raise the 100-degree operating limit to 104 degrees to keep the reactors on line.


The NRC, meanwhile, is still evaluating FPL’s request to increase the cooling canal temperature limits for operating the reactors.

“What they’ve run into more recently is (temperatures are) trending higher than historical averages,” said NRC spokesman Roger Hannah. “It is very warm because most plants in the country, and I don’t know specifically for all plants, but most plants would have temperatures much lower.”

High waters temperatures, an algae bloom and a spreading underground saltwater plume may not appear related but they do highlight the complexity of operating a plant that depends on cool water in steamy South Florida.

“With a big industrial facility next to the park, you’ve got be concerned, said Biscayne National Park superintendent Brian Carlstrom. “I’d rather be on the side of erring with an abundance of caution than be on the response side of trying to mitigate an environmental catastrophe.”

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