Energy Solutions Inc. has signed a term sheet with FirstEnergy Corp. to acquire the Pennsylvania site, according to a statement Tuesday. Terms weren’t disclosed and the deal doesn’t include Unit 1, the Exelon Corp.-owned reactor that’s scheduled to be closed in September.

Three Mile Island’s Unit 2 is arguably the nation’s most infamous nuclear plant. In March 1979, a pump failure triggered an emergency shutdown that resulted in a partial meltdown and a radiation leak. It remains the worst nuclear accident in U.S. history.

Seven U.S. nuclear plants have gone dark since 2013 and at least six more are expected to be closed in the next few years as the facilities struggle to compete against cheap electricity from natural gas and renewables. That’s spurred the emergence of decommissioning specialists that buy the plants and tear them down.

Energy Solutions is already handling other decommissioning projects, but this would be the first time it assumes full ownership of a reactor. It’s forming a joint venture with the New Jersey-based construction company Joseph Jingoli & Son Inc. to handle the Three Mile Island project.

The job won’t include handling the plant’s spent nuclear fuel rods, which were removed in the 1980s.

Other nuclear services companies have pursued similar deals, including Northstar Group Services Inc., which is currently at work on the Vermont Yankee plant it bought in January from Entergy Corp., and Holtec International, which has acquired or agreed to buy four plants from Entergy and Exelon Corp.