I can't post the link, as Yahoo won't allow that, just copy a piece of what I posted and then google that, it should take you to a PDF called "Interagency Review Needed to Update U.S. Position on Enriched Uranium That Can Be Used for Tritium Production" or just google that!
I found it when I was looking for info on Silex, the way it read to me, was that if they could use the Silex process they would, but because it is foreign owned technology and because it can only be used for peaceful purposes, then that prevents the US from using it for that purpose.
As DOE assesses future options for obtaining unobligated LEU to produce tritium, one option may be to pay the costs to operate the ACP—potentially hundreds of millions of dollars a year. In this context, you asked us to review the peaceful use provisions in international agreements pertaining to enrichment facilities using foreign technology in the United States, particularly as they pertain to the production of tritium.17
To determine the extent to which DOE has adhered to its practice of using only unobligated LEU to meet national security needs for tritium, we reviewed DOE and NNSA documents. In addition, we interviewed officials from DOE, NNSA, the Department of State, and the Tennessee Valley Authority (TVA)—which produces tritium through an interagency agreement with DOE. We also reviewed documents and interviewed officials from the Nuclear Regulatory Commission (NRC). To determine the basis for DOE’s practice for using unobligated LEU to meet national security needs for tritium, we reviewed DOE and NNSA documents and assessed relevant international agreements pertaining to the transfer of enrichment technology into the United States and the extent to which these agreements compel DOE to use exclusively unobligated LEU for meeting national security needs. We interviewed officials from NNSA, TVA, and the Department of State, as well as representatives from USEC and URENCO. This report examines (1) the extent to which DOE has adhered to its practice of using only unobligated LEU to meet national security needs for tritium and (2) the basis for DOE’s practice of using only unobligated LEU to meet national security needs for tritium.