The Dukakis administration said it would fight a Nuclear Regulatory Commission staff decision clearing the way for low-power testing, possibly later this month, of the Seabrook nuclear power plant in neighboring New Hampshire.

"This shows," said Massachusetts Attorney General James Shannon, "how the NRC refuses to acknowledge the consequences of even low-power testing at Seabrook and is willing to stick the people of this region with the needless cost of radiation."A spokesman for Gov. Michael Dukakis said the state would go before the 1st U.S. Circuit Court of Appeals in Boston as early as today in an effort to overturn or delay the rulings.

Other opponents of the $5.9 billion reactor on the New Hampshire seacoast said they would also attempt to block the plant's long-delayed start-up.