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Dominion plans to shutter two of the four units at Salem Harbor Power Station by the end of this year, and it will close the entire plant in Salem, Mass., by June 2014 because “pending environmental regulations and market conditions are making the power station uneconomical to operate,” the company announced today. The news comes on the heels of the announced closure of Dominion’s State Line Power Plant in Hammond, Ind.

Two newly built reactors reached important milestones in the past week. Reports say the second unit of the Ling Ao phase II nuclear plant in China’s Guangdong Province was connected to the grid on May 3, while Russian state-owned Atomstroyexport said Iran’s Bushehr Nuclear Power Plant achieved criticality on May 8 and is now functioning at the minimum controlled power level.

On Sunday, Mexico’s labor secretary, Javier Lozano, announced that the bodies of all 14 miners had been retrieved from a coal mine in northern Mexico that collapsed last Tuesday after a methane explosion.

Japanese utility Chubu Electric Power Co. on Monday agreed to shut down all units at its Hamaoka nuclear power plant in Shizuoka Prefecture as soon as possible on safety concerns. The action includes idling Unit 4 and Unit 5, an advanced boiling water reactor that started commercial operation in 2005. The company, which is in the process of mothballing Units 1 and 2, said it would also postpone restarting Unit 3, which has been shut down for maintenance since November 2010.

 Marine energy technology firm Ocean Power Technologies (OPT) on Monday said it had begun ocean trials of the first of its new generation utility-scale PowerBuoy device, the PB150. The ocean trials are being conducted at a site approximately 33 nautical miles from Invergordon, off ScotlandÂ’s northeast coast, and are expected to last up to three months.

Dominion will at the end of next year close the 515-MW State Line Power Station in Hammond, Ind. The coal-fired plant has two units: The first fired up in 1955 and the second, in 1962.

In the latest of a string of mergers in the utility sector, Exelon on Thursday said it would buy Constellation Energy in a $7.9 billion deal. The agreement would bring together Exelon’s large nuclear fleet and Constellation’s “customer-facing” business, creating a platform for growth, the companies said in a joint statement.

The North American Electric Reliability Corp. (NERC) plans to conduct a large-scale grid security exercise later this year that will involve bulk North American power system owners and operators.

The Massachusetts Department of Energy Resources (DOER) on Tuesday filed draft rules with the state Legislature that could require large wood-burning power producers to meet strict greenhouse gas (GHG) emission standards before they can receive state financing. The rules were modeled on conclusions reached in a June 2010 study that burning forest trees for power is not carbon neutral.

A law signed by Governor Chris Gregoire on Friday phases out coal-fired power production in Washington State with the closure of two coal boilers at TransAlta’s Centralia power plant.