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A federal district court on Thursday ruled in favor of more than 800 plaintiffs when it held the Tennessee Valley Authority (TVA) liable for the December 2008 failure of coal ash containment dikes at its Kingston Fossil plant in Roane County, Tenn., that resulted in the spill of more than a billion gallons of coal ash sludge.

Injection of carbon dioxide began last week at one of the world’s first fully integrated coal-fired carbon capture, transportation, and geologic storage projects. The "Anthropogenic Test" conducted by the Southeast Regional Carbon Sequestration Partnership (SECARB) transports carbon dioxide via a 12-mile pipeline from a 25-MW post-combustion carbon capture facility at Southern Co.’s 2,657-MW Plant Barry in Bucks, Ala., and sequesters it within a saline Paluxy Formation at the nearby Citronelle Oil Field operated by Denbury Resources.

Exelon on Tuesday said it plans to withdraw its Early Site Permit (ESP) application for construction of a new reactor at an 11,500-acre tract of land southeast of Victoria, Texas, saying “low natural gas prices and economic and market conditions . . . have made construction of new merchant nuclear power plants in competitive markets uneconomical now and for the foreseeable future.”

The U.S. Trade Representative on Monday asked the U.S. International Trade Commission (ITC) to investigate how U.S.-provided renewable energy services affect development of renewable energy projects worldwide. The ITC’s report, expected by June 28, 2013, will focus on the development, generation, and distribution of renewable energy—specifically onshore and offshore wind and solar energy.

Hurricane Isaac soaked the Gulf Coast of Louisiana and Mississippi after making landfall Tuesday night with sustained winds of up to 80 mph, leaving thousands without power in five states. On Tuesday, Entergy took its Waterford 3 nuclear plant offline as a precautionary measure.

In a landmark ruling that has been seen as a major victory for thermal generators, the U.S. Court of Appeals for the District of Columbia Circuit on Tuesday vacated the Environmental Protection Agency’s (EPA’s) Cross-State Air Pollution Rule (CSAPR), finding that it violated federal law. The EPA must now continue implementation of the Clean Air Interstate Rule (CAIR) until it can promulgate a replacement, which likely will not happen until at least 2014, industry analysts said.

The U.S. Department of Homeland Security (DHS) on Tuesday issued an alert warning that industrial Ethernet switches and other devices made by network equipment manufacturer RuggedCom and widely used by power companies could be vulnerable to compromise.

The Federal Energy Regulatory Commission (FERC) on Tuesday approved a full build-out of a 1.5-MW gird-connected wave power station that is planned by Ocean Power Technologies’ (OPT’s) Oregon subsidiary Reedsport OPT Wave Park. The license is the first issued for a wave power station in the nation.

Canada’s nuclear regulator on Friday issued a 10-year nuclear power reactor site preparation license to Ontario Power Generation’s (OPG’s) proposed reactor at its Darlington nuclear site in Ontario. The license, described as "an important milestone in Canada’s nuclear history," is the first of its kind in nearly 25 years.

Four rules recently proposed or finalized by the Environmental Protection Agency (EPA) could prompt power companies to retrofit most coal-fired generating units and retire 2% to 12% of coal-fired capacity. The rules would also likely increase power prices in some regions, though they may not cause widespread reliability concerns, a new report by the Government Accountability Office (GAO) suggests.