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The Department of Energy (DOE) on Monday announced a conditional commitment for a $2.1 billion loan guarantee to support Units 1 and 2 of Solar Trust of America’s Blythe Solar Power Project. The two-unit 484-MW concentrating solar thermal plant will be built near Blythe, in Riverside County, Calif.

Plans to build and operate the Cape Wind project nearly 5 miles offshore in Nantucket Sound, Mass., were approved on Tuesday by the Department of Interior’s Bureau of Ocean Energy Management, Regulation, and Enforcement (BOEMRE). Cape Wind Associates now says that construction of what could be the first U.S. offshore wind farm could begin as early as this fall, but the controversial project must still overcome several hurdles.

The Nuclear Regulatory Commission and the U.S. Army Corps of Engineers (USACE), Charleston District, have completed the Final Environmental Impact Statement (FEIS) for the Combined Licenses (COL) for the proposed V.C. Summer Units 2 and 3 reactors, concluding that there are no environmental impacts that would preclude issuing the COLs for construction and operation of the proposed reactors at the site, near Jenkinsville, S.C.

On Tuesday, Japan’s Nuclear and Industrial Safety Agency (NISA) provisionally raised the accident rating for three reactors at the crippled six-unit Daiichi nuclear plant in Fukushima Prefecture to Level 7—making it a “major accident” and putting in on par with the 1986 Chernobyl accident in the Ukraine. And today the Tokyo Electric Power Co. (TEPCO) confirmed damage to spent nuclear fuel rods stored in the Unit 4 building.

The Nuclear Regulatory Commission (NRC) on Friday told Unistar Nuclear Energy it could not issue the company an operating license for its planned reactor at Calvert Cliffs in Maryland because it was fully owned by France’s Électricité de France (EDF)—a foreign entity.

Progress Energy Florida last week told the Nuclear Regulatory Commission (NRC) and state regulators that Crystal River Nuclear plant has been shut down indefinitely while the company conducts a “thorough engineering analysis and review” of a new gap in the reactor’s containment building wall that resulted from tendon retensioning work.

California’s Governor Jerry Brown on Tuesday signed into law SBX1-2, a law that increases the state’s renewable portfolio standard (RPS) target from 20% in 2010 to 33% by 2020—the most aggressive goal in the nation. In his signing message, Brown said he would pursue even more far-reaching targets, pushing the RPS to 40% in the “near future.”

A report released last week by the Electric Power Research Institute (EPRI) that broadly assesses the costs and benefits to modernize the U.S. power system suggests that investments needed to deploy a fully functional smart grid range between $338 billion and $476 billion—but could result in benefits of $1.3 trillion to $2 trillion.

In 2010, only 5,116 MW of nameplate wind capacity was added in the U.S.—a nearly 50% drop from the record 10,000 MW installed in 2009, the American Wind Energy Association (AWEA) said in its newly released annual report. The industry group said, however, that wind power capacity added in 2010 made up 26% of all new generating capacity added in the U.S.—second only to natural gas.

Solar power in the U.S. received multiple boosts in the past week as the Department of Energy (DOE) finalized $2.7 billion in loan guarantees for solar projects in California while making available $170 million in funding for solar photovoltaic (PV) technologies, and GE Energy announced plans for what it said will be the biggest solar PV panel factory in the U.S.