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The busyness of the nuclear fuel supply chain
Ken Petersenpresident@ans.org
With all that is happening in the industry these days, the nuclear fuel supply chain is still a hot topic. The Russian assault in Ukraine continues to upend the “where” and “how” of attaining nuclear fuel—and it has also motivated U.S. legislators to act.
Two years into the Russian war with Ukraine, things are different. The Inflation Reduction Act was passed in 2022, authorizing $700 million in funding to support production of high-assay low-enriched uranium in the United States. Meanwhile, the Department of Energy this January issued a $500 million request for proposals to stimulate new HALEU production. The Emergency National Security Supplemental Appropriations Act of 2024 includes $2.7 billion in funding for new uranium enrichment production. This funding was diverted from the Civil Nuclear Credits program and will only be released if there is a ban on importing Russian uranium into the United States—which could happen by the time this column is published, as legislation that bans Russian uranium has passed the House as of this writing and is headed for the Senate. Also being considered is legislation that would sanction Russian uranium. Alternatively, the Biden-Harris administration may choose to ban Russian uranium without legislation in order to obtain access to the $2.7 billion in funding.
Hans-Dieter Falter, Ernest Thompson
Fusion Science and Technology | Volume 29 | Number 4 | July 1996 | Pages 584-595
Technical Paper | Plasma Heating System | doi.org/10.13182/FST96-A30700
Articles are hosted by Taylor and Francis Online.
Rectangular Hypervapotron beam-stopping elements made from Cu-Cr-Zr have been used in the Joint European Torus (JET) beam injectors to dissipate up to 100 MW of power. Experience over more than 10 yr is outstanding with not a single failure. At the flow velocities used in the Hypervapotron elements of the JET injectors, the turbulence created by the fins dominates the heat transfer, and the Hypervapotron mechanism is of secondary importance. The main advantage of the Hypervapotron is the geometrical flexibility. The surface can be shaped freely as required without compromising on either heat transfer or total power-handling capability. Flow velocity and flow rate can be independently adjusted to requirements. Peak power densities up to 30 MW/m2 were removed at a flow velocity of 7 m/s and a pressure drop of 0.25 MPa/m. Flow parameters were as follows: velocity ≤11 m/s, inlet pressure ≤1 MPa, and inlet temperature ≤50°C.
