Westinghouse and Toshiba did not disclose the terms of the agreement, scheduled to close Oct. 11.
"This acquisition will better enable Westinghouse to provide engineering support and project management services in the very important French market," said Nick Liparulo, Westinghouse vice president of engineering, in the statement provided by the Japanese electronics maker.
The deal should further help Westinghouse prepare for expected growth in the industry around the globe, the statement also quoted Liparulo as saying.
Astare, which is headquartered near Paris and has offices in Marseille and Lyon, will continue to operate as Astare, and the company's approximately 100 employees will be retained, Liparulo said.
Tokyo-based Toshiba holds a 77 percent stake in Monroeville, Pennsylvania-based Westinghouse, which it bought from the U.K.'s British Nuclear Fuels PLC last year for US$4.2 billion (EUR 3.0 billion).
The discovery of the submarine has unveiled a few "inconsistencies." For example, how can one explain the fact that the sub was found where it needed to be searched for from the start?
When on a state visit to Singapore, Russian President Vladimir Putin promised to revisit the discussion of the 1956 Declaration between the USSR and Japan regarding the issue of the peace treaty with Japan
The TurkStream, which runs along the bottom of the Black Sea from Russia's Anapa to Turkey, will consist of two lines, each with a capacity of 15.75 billion cubic meters of gas a year