The Advanced Neutron Source was included in the 1994 and 1995 president's budgets as an enhanced infrastructure initiative and as a construction line item. However, in 1994 in the wake of the Superconducting Super Collider cancellation, the U.S. Congress appropriated $17 million of a requested $39 million for the research reactor project, specifying that this money be used to continue research and development and preliminary design. The line item was delayed to allow DOE time to perform a technical evaluation of the impact on ANS performance of using low-enriched fuel. This study is now complete; a draft report has been submitted to DOE.

On December 3, 1993, for the second consecutive year, the Clinton administration again supported a line item for the ANS in the fiscal year 1995 budget for $40 million. In early June 1994 the U.S. House of Representatives approved $10 million in operating funds and $1 million in capital money to start construction on the ANS. However, on June 23, 1994, the U.S. Senate Energy and Water Development Appropriations Committee voted to continue ANS development by allocating all $21 million to operating money but deferred construction funding again. The committee's energy subcommittee stated in its report, "The project does not appear to be mature enough at this time to begin construction." It added that the project needs "a firm and mature conceptual design," a "streamlined management chain," and a final environmental impact statement. The differences between the House and Senate on whether to start construction were referred to a conference committee for resolution.

On August 11, 1994, the conference committee provided $21 million for design but no construction line item. However, the committee did provide language with the bill that allows ANS to engage industry in the design process, a necessary step toward actual construction.

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Neutron Scattering at the High Flux Isotope Reactor