Extreme weather causes emergency shutdown of nuclear plant in Iowa
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‘Derecho’ storm causes Cargill plant closure, emergency shutdown of nuclear plant in Iowa
The storm caused crop damage and outages throughout the Midwest Star Tribune,
By Mike Hughlett Star Tribune, AUGUST 12, 2020 — A violent storm that tore through Iowa on Monday caused an emergency shutdown at a nuclear power plant near Cedar Rapids.
The storm packing hurricane-force winds tore across the Midwest, compounding troubles for a U.S. farm economy already battered by extreme weather, the U.S.-China trade war and most recently, the disruption caused to labor and consumption by the COVID-19 pandemic. Grain silos were ripped apart, and Minnetonka-based Cargill and Archer Daniels Midland closed crop-processing plants in Cedar Rapids. The Duane Arnold nuclear plant lost its connection to the electricity grid. At about 1 p.m., the plant in Palo, 11 miles northwest of Cedar Rapids, declared an “unusual event” — an indication of a safety threat, according to a report posted Tuesday by the U.S. Nuclear Regulatory Commission (NRC). An unusual event is the lowest of four levels of emergency conditions under NRC regulations. While the Duane Arnold plant is not now producing electricity, it does have power to run its emergency systems. The plant is stable and is using a backup power source at this time,” Duane Arnold’s majority owner and operator, Florida-based NextEra Energy Resources, said in a statement. The storms damaged the plant’s cooling towers, which are used in electricity production to cool steam after it exits the turbine, NextEra said. The cooling towers are not part of the safety systems used to cool the reactor and other critical components……. David Lochbaum, former director of the Union of Concerned Scientists’ nuclear safety project, said that loss of off-site power at nuclear power plants — usually due to storms — happens about four to five times a year in the U.S. Iowa’s 45-year-old Duane Arnold plant, which is a little smaller than Xcel Energy’s nuclear plant in Monticello, is due to shut down later this year………. |
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