Hitachi Zosen Corp. said Friday it will acquire NAC International Inc., a U.S. nuclear fuel cycle consultancy that manages spent fuel, to help develop its nuclear equipment business.

The Japanese shipbuilder said subsidiary Hitz Holdings U.S.A. Inc. will purchase all of NAC's outstanding shares from its parent, USEC Inc., for $45 million (about ¥4 billion) in March.

Hitachi Zosen, which produces equipment for storing and transporting spent nuclear fuel, will use the acquisition to establish an integrated production system, which is NAC's expertise.

Georgia-based NAC International scored sales of $71 million, or about ¥6.4 billion, in 2011.