Hanford Tank Waste Operations & Closure, LLC Approved to Begin Hanford Tanks Cleanup Contract

17 October 2024

(LYNCHBURG, Va. - October 17, 2024) - BWX Technologies, Inc. (NYSE: BWXT) is pleased to announce that Hanford Tank Waste Operations & Closure, LLC (H2C) has been approved by the U.S. Department of Energy (DOE) to begin the Hanford Integrated Tank Disposition Contract (ITDC).

After being previously approved to work on pre-transition activities, the DOE has issued H2C a notice to proceed, effective October 21, 2024. Earlier in 2024, the DOE announced that the contract had been awarded to H2C, which is a joint venture led by a BWXT subsidiary and includes Amentum and Fluor companies. A protest against this award was recently dismissed in the U.S. Court of Federal Claims.

"We are very excited to begin working with DOE on this incredibly important cleanup mission," said Heatherly Dukes, president of BWXT Technical Services Group. "H2C's leadership team has been deployed and brings 170 years of combined experience in tank waste disposition and disciplined nuclear operations."

The scope of the ITDC includes operation of Hanford tank farm facilities, eventual operation of the Waste Treatment and Immobilization Plant, and responsibility for other core functions such as project management, security and emergency services, business performance, and environment, safety, health and quality.

Forward Looking Statements

BWXT cautions that this release contains forward-looking statements, including statements relating to the performance, timing, impact and value, to the extent contract value can be viewed as an indicator of future revenues, of the ITDC, future work at the Hanford site, and the award or exercise of any contract options or orders. These forward-looking statements involve a number of risks and uncertainties, including, among other things, modification or termination of the ITDC and delays. If one or more of these or other risks materialize, actual results may vary materially from those expressed. For a more complete discussion of these and other risk factors, please see BWXT's annual report on Form 10-K for the year ended December 31, 2023 and subsequent reports on Form 10-Q filed with the Securities and Exchange Commission. BWXT cautions not to place undue reliance on these forward-looking statements, which speak only as of the date of this release, and undertakes no obligation to update or revise any forward-looking statement, except to the extent required by applicable law.

About BWXT

At BWX Technologies, Inc. (NYSE: BWXT), we are People Strong, Innovation Driven. A U.S.-based company, BWXT is a Fortune 1000 and Defense News Top 100 manufacturing and engineering innovator that provides safe and effective nuclear solutions for global security, clean energy, environmental restoration, nuclear medicine and space exploration. With approximately 7,800 employees, BWXT has 14 major operating sites in the U.S., Canada and the U.K. In addition, BWXT joint ventures provide management and operations at a dozen U.S. Department of Energy and NASA facilities. For more information, visitwww.bwxt.com. Follow us onLinkedIn,X,FacebookandInstagram.

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