FOR IMMEDIATE RELEASE:
November 4, 2008

USEC Updates American Centrifuge Progress

BETHESDA, Md. - USEC Inc. (NYSE: USU) today reported substantial progress in building the American Centrifuge Plant (ACP) in Piketon, Ohio, as it prepares to install its next cascade of 40 to 50 centrifuge machines assembled from components made by its strategic suppliers beginning this month.

We refer to our production centrifuge design as the AC100 series centrifuge machine. The initial design for the AC100 machine reflects improvements learned during individual machine testing and subsequent integrated testing. The AC100 series centrifuge machine is designed to produce 350 SWU per year. The cascade of AC100 machines we are currently assembling is expected to start operations by the end of March 2009.

All of our major suppliers have been fully qualified to begin manufacturing components and have been preparing their facilities for high-volume manufacturing. We are re-establishing the manufacturing base for this technology in the United States, which is creating hundreds of highly skilled jobs. We also continue preparing the infrastructure of the ACP for plant operations starting in early 2010.

"This is a crucial time period for the American Centrifuge program. We have finalized the initial design for our state-of-the-art machine and our strategic suppliers are manufacturing components," said John K. Welch, USEC president and chief executive officer. "The centrifuges we install over the next few months for the cascade of AC100 machines are anticipated to be the initial building block for the 3.8 million SWU plant.

"USEC experts in Oak Ridge are leading an integrated program with our suppliers to value engineer the commercial plant machine so we can drive down manufacturing costs," Welch said. "We also continue to work closely with DOE to provide the information they need to promptly assess and evaluate our application for a $2 billion loan guarantee to help fund this essential plant.

"The nuclear power industry's manufacturing base has significantly diminished over the last two decades. We are making an investment of millions of dollars to re-establish portions of America's manufacturing base, which is creating hundreds of highly skilled jobs at a critical time for our economy," Welch said. "Moreover, a reliable, domestic source of enriched uranium for nuclear fuel is an important factor for utilities as they make decisions about building new reactors."

During the past five years, we have been developing and demonstrating a gas centrifuge technology that we call the American Centrifuge. This technology was initially developed by DOE during the 1970s and 80s and successfully demonstrated, but was ultimately not commercially deployed for reasons unrelated to the technology itself. We have modified and improved this technology through the use of modern materials, advanced computer-aided design, digital controls and state-of-the-art manufacturing processes.

We have been operating the Lead Cascade integrated testing program since August 2007. We have been testing prototype machines and have demonstrated the ability of the cascade to generate product assays in a range useable by commercial nuclear power plants, obtained data on machine-to-machine interactions, verified cascade performance models under a variety of operating conditions, and obtained operating experience for our plant operators and technicians.

The centrifuge machines involved in the Lead Cascade integrated testing program have operated for more than 125,000 total machine hours, providing data on equipment reliability and identifying opportunities to further optimize the machine and cascade design. These prototype machines confirmed design and performance targets while verifying the predictions of our analytical performance models. During the past year, we strenuously tested the centrifuge machines in operating conditions unlikely to be seen in normal plant operations. Lead Cascade operations have also given our employees experience in operating a cascade of machines in a variety of conditions that has allowed us to refine our operating and maintenance procedures.

A cascade of AC100 machines is expected to be operational by the end of the first quarter of 2009 and is intended to provide additional data on equipment operation and reliability, and identify opportunities to further optimize the machine and cascade design. In addition, improved AC100 components and design features are being tested in special test stands in Oak Ridge, Tenn., and have been incrementally introduced into the current cascade. We also continue to work on the design for the value-engineered AC100 machine, which is expected to be completed in March 2009. The value-engineered AC100 machine is the machine we expect to deploy in the commercial plant.

Because the highly specialized U.S. manufacturing base needed to build the AC100 did not exist, a major focus for our American Centrifuge team has been creating this crucial industrial infrastructure. For example, we significantly refurbished a facility we purchased in Oak Ridge and installed new production machining equipment, robotics, and computer controls and testing systems to support the ramp-up to manufacturing centrifuge components. We have contracted with B&W Clinch River, LLC, a subsidiary of the Babcock and Wilcox Co., to manufacture upper suspension assemblies, lower suspension assemblies, cap assemblies and column parts at this facility as well as assembling rotors and procuring unclassified metal parts. A subsidiary of Alliant Techsystems Inc., or ATK, is expanding facilities it has at the Allegany Ballistics Laboratory in Rocket Center, W.Va. It will produce the carbon-fiber rotor tubes for the centrifuges. Major Tool & Machine, Inc. is significantly expanding facilities at its Indianapolis, Ind., plant to fabricate the steel casings for the machines. Teledyne Brown Engineering, Inc. will manufacture service modules for the ACP. These steel framed structures hold pipe headers and valves, control and instrument cabling, electrical distribution cables and other controls. The manufacturing infrastructure that we are putting into place to deploy the initial plant capacity will be available to support any future expansion beyond 3.8 million SWU. Because an expansion would not require creating this manufacturing infrastructure or another demonstration of the technology, the cost of any expansion is anticipated to be less than the initial project.

Following receipt of a construction and operating license from the NRC in April 2007, we began renovating and building the ACP in Piketon, Ohio. Contractors completed preparing one production building floor for machine mounts and are preparing the second production building. A facility where uranium feed is introduced into plant systems and low enriched uranium is withdrawn is undergoing substantial renovation, and a new boiler that will provide heat to the ACP is being installed. We continue to build out the ACP balance of plant and signed an engineering, procurement, construction and construction management services contract with Fluor Corporation totaling approximately $1 billion during the third quarter. Under the new contract, which runs from 2008 to 2012, Fluor will be reimbursed for costs plus a fixed fee. Fluor can also earn an incentive fee based on cost savings produced.

We completed a thorough, bottom-up review of the cost to build the ACP and in August announced a project budget of $3.5 billion. This budget includes amounts already spent but does not include financing costs or financial assurance. As of Sept. 30, 2008, we had spent just over $1 billion on project development, deployment and construction. Spending on the project in 2008 is expected to be below the guidance we issued in previous quarters. The lower spending compared to prior guidance primarily reflects the timing of certain project activities that are not expected to affect the scheduled completion of the ACP at the end of 2012 and, to a lesser extent, lower than expected project management and labor costs in the current period.

While our project budget includes some degree of embedded contingency with respect to cost assumptions for labor and materials, such as carbon steel and stainless steel, we remain subject to cost escalation risk. If project management determines that costs will exceed the budget (including the built-in management reserve), and such costs cannot otherwise be offset or financed, we may elect to deploy fewer centrifuge machines in the plant to mitigate such potential cost growth. The modular nature of the plant construction permits normal operation even if the scale is reduced from the current planned size.

Under our current schedule, we expect to receive the first AC100 machines from our manufacturers in November and begin AC100 Lead Cascade operation by the end of the first quarter of 2009. These operations will continue through 2009. These machines may be integrated into a commercial cascade. Our suppliers have been focused on building the facilities necessary to be in position to build several hundred AC100 machines per month. Progress on building the production facilities is on track to support the production schedules for both the AC100 and AC100 value-engineered machines. Finally, in terms of plant startup and operations, we anticipate beginning commercial operations at the end of the first quarter of 2010, and reaching 1 million SWU capacity in first quarter of 2011 and the full 3.8 million SWU capacity at the end of 2012. Our ability to stay on schedule will depend on several factors, including expected cash flow from operations, the anticipated spending profile for the project, and our progress with respect to obtaining financing or a financing commitment under the DOE loan guarantee program, each of which is uncertain.

Our testing program in Oak Ridge has demonstrated machine productivity beyond 350 SWU per year. We anticipate being able to assemble and install machines with greater SWU capacity at a discrete point in the deployment of centrifuges for our initial two production buildings, which have space for approximately 11,500 centrifuges.

In September 2008 we created new wholly owned subsidiaries to carry out future commercial activities related to the American Centrifuge project. These subsidiaries will own the American Centrifuge plant and equipment, provide operations and maintenance, manufacture centrifuge machines and conduct ongoing centrifuge research and development. This corporate structure will separate ownership and control of centrifuge technology from ownership of the enrichment plant and also establish a separate operations subsidiary. This structure will facilitate DOE loan guarantee financing and potential third party investment at the project level, while also facilitating any future plant expansion.

We must still raise the remainder of the capital needed to build the ACP and this has been and will continue to be a focus of management. We do not believe public market financing for a large capital project such as ACP is available to us given current financial market conditions. We view the DOE loan guarantee program as the path for obtaining the debt financing to complete the American Centrifuge project. The loan guarantee program was created by the Energy Policy Act of 2005. In December 2007, federal legislation authorized funding levels available through September 30, 2009, of up to $2 billion for advanced facilities for the front end of the nuclear fuel cycle, which includes uranium enrichment. DOE released its solicitation for the loan guarantee program on June 30, 2008, and we applied for $2 billion in funding in July. One competing project also applied for funding under this program. Nonetheless, we believe that our project is ideally suited for the loan guarantee program. Our application is under review and we are seeking a prompt commitment from DOE. However, we have no assurance that our project will be selected to move forward in the program and it could take an extended period for the loan guarantee and funding to be finalized. Accordingly, on a parallel path, we continue to evaluate alternative sources of capital, including potential third-party investment at the project level. If we are not able to obtain timely action from DOE or obtain an alternate capital commitment, we will be forced to slow spending on the project, which will result in potentially significant schedule delays and increased costs, or take other actions to ensure that we have adequate liquidity for our ongoing operations.

Our Marketing and Sales department has been engaging in discussions with our customers to sell the output of the ACP. By waiting until now to sell this production, we believe we are in a better position to structure proposals for long-term sales to customers in ways that will provide stronger support for our financing and earn an appropriate return on our capital. We have received accepted offers from customers and are in the process of negotiating and signing long-term contracts for commitments. We will continue to meet with customers to continue the process of selling ACP output. Sales contracts for this initial output represent a strategic commitment by customers to ensure a reliable, U.S.-based source of nuclear fuel that will be available for decades to come.

USEC Inc., a global energy company, is a leading supplier of enriched uranium fuel for commercial nuclear power plants.

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Forward Looking Statements

This news release contains "forward-looking statements" - that is, statements related to future events.  In this context, forward-looking statements may address our expected future business and financial performance, and often contain words such as "expects," "anticipates," "intends," "plans," "believes," "will" and other words of similar meaning. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. For USEC, particular risks and uncertainties that could cause our actual future results to differ materially from those expressed in our forward-looking statements include, but are not limited to: the success of the demonstration and deployment of our American Centrifuge technology including our ability to meet our performance targets and schedule for the American Centrifuge Plant; the cost of the American Centrifuge Plant and our ability to timely secure a loan guarantee or other financing; the cost of electric power used at our gaseous diffusion plant; our dependence on deliveries under the Russian Contract and on a single production facility; our inability under most existing long-term contracts to pass on to customers increases in SWU prices under the Russian Contract resulting from significant increases in market prices; changes in existing restrictions on imports of Russian enriched uranium; the elimination of duties charged on imports of foreign-produced low enriched uranium; pricing trends in the uranium and enrichment markets and their impact on our profitability; changes to, or termination of, our contracts with the U.S. government and changes in U.S. government priorities and the availability of government funding, including loan guarantees; the impact of government regulation; the outcome of legal proceedings and other contingencies (including lawsuits and government investigations or audits); the competitive environment for our products and services; changes in the nuclear energy industry; the potential impact of current financial market conditions on our pension assets and credit and insurance facilities; and other risks and uncertainties discussed in our filings with the Securities and Exchange Commission, including our Annual Report on Form 10-K/A. We do not undertake to update our forward-looking statements except as required by law.

Contacts
Investors:      Steven Wingfield (301) 564-3354
Media:          Elizabeth Stuckle (301) 564-3399