POWERnews

On Monday, federal regulators renewed the operating licenses for Xcel Energy Inc.’s Prairie Island Nuclear Generating Plant, Units 1 and 2, which will allow the plant to run for 20 more years. Four days earlier, Xcel shut down its other nuclear plant in Minnesota to repair a valve.

U.S. Supreme Court justices on Monday unanimously decided that the Clean Air Act (CAA) and other efforts by the Environmental Protection Agency (EPA) to regulate greenhouse gas (GHGs)  “displace” any federal common-law right to “seek abatement of carbon dioxide emissions” from fossil fuel–fired power plants—including claims that GHG emissions constitute a “public nuisance.”

The Government Accountability Office (GAO) says in a new report that while all U.S. nuclear plant sites have had some groundwater contamination from radioactive leaks,  there was no discernable impact on the public’s health from radioactive leaks at three nuclear plants it investigated. It concludes, however, that the Nuclear Regulatory Commission (NRC) could better identify and characterize the leaks if it required transparent monitoring data from licensees.

The U.S. Supreme Court on Monday said it would hear an appeal from PPL Montana of a March 2010 Montana Supreme Court decision that would have forced the power company to pay accrued rent and interest worth some $56 million to the state of Montana for the use of riverbeds beneath the company’s hydroelectric plants—some which have been generating power for more than a century.

The EPA on Tuesday extended by 30 days the timeline for public input on the proposed mercury and air toxics standards, though it stressed that the extension would not alter the timeline for issuing the final standards in November 2011. The public comment period for the so-called Toxic Air rule will now end on August 4, 2011.

A bipartisan group of lawmakers on the House Energy and Commerce Committee today introduced legislation that directs the Environmental Protection Agency (EPA) to develop “achievable standards” for industrial boilers and incinerators and grants more time for the development of and compliance with those rules.

San Antonio’s CPS Energy on Monday announced it would mothball by 2018—15 years earlier than planned—its 871-MW coal-fired J.T. Deely Power Plant—instead of spending an estimated $3 billion on pollution controls to comply with anticipated environmental regulations. The nation’s largest municipal utility expects to replace the plant’s generation through conservation and future renewable sources.

The Department of Energy (DOE) doled out several loan guarantee offers worth a combined $919 million in the past week. Recipients of the conditional commitments include Mesquite Solar 1 for the development of a 150-MW photovoltaic (PV) solar project in Arizona; Calisolar Inc. to help commercialize its silicon solar manufacturing process; 1366 Technologies to develop a multicrystalline wafer-manufacturing project, and Granite Reliable Power for a 99-MW wind project.

The U.S. installed 252 MW of grid-connected photovoltaic (PV) solar projects in the first four months of this year—66% more than the first quarter of 2010, the Solar Energy Industries Association (SEIA) says in a newly released report. The industry group also says that cumulatively, grid-connected solar electric installations in the U.S. have reached more than 2.85 GW—2.3 GW of which is grid-connected PV.

A report released on Friday by the Government Accountability Office (GAO) finds that power plant smokestacks of 500 feet or higher disperse pollutants over greater distances—and that stack height is one of several factors that contribute to the interstate transport of air pollution. The congressional investigative arm also finds that several boilers remain uncontrolled for certain pollutants, including several connected to tall stacks.