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Conference Spotlight
2025 ANS Winter Conference & Expo
November 8–12, 2025
Washington, DC|Washington Hilton
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
Ho Nieh, TVA board members, and nuclear fuel recycling bill head to Senate floor
Nieh
Ho Nieh, the Trump administration’s nominee to be a member of the Nuclear Regulatory Commission, and four new board members of the Tennessee Valley Authority were approved in a vote today by the Senate Environment and Public Works Committee and head to the Senate floor for a final vote.
The committee also voted to advance to the Senate floor the Nuclear REFUEL Act of 2025 (S. 2082), which would smooth the regulatory pathway for recycling used nuclear fuel.
President Donald nominated Nieh on July 30 to serve as NRC commissioner for the remainder of a term set to expire June 30, 2029, which was held by former NRC commissioner Chris Hanson, who Trump fired in June.
Pran K. Paul, Michael V. Gregory, Tunc Aldemir
Nuclear Technology | Volume 137 | Number 2 | February 2002 | Pages 147-162
Technical Paper | Radioactive Waste Management and Disposal | doi.org/10.13182/NT02-A3264
Articles are hosted by Taylor and Francis Online.
A dynamic optimization scheme has been developed to generate high-level-waste (HLW) blending sequences that optimize waste-processing parameters such as raw waste volume processed in a batch, waste-processing time, or waste-processing cost. The optimization algorithm takes advantage of the linear algebraic equation formulation and the continuous-discrete event mapping algorithms used in the Production Planning Model (ProdMod) simulator development. The FORTRAN-based optimizer is interfaced with the SPEEDUP-based dynamic process simulator ProdMod. The optimization scheme has been successfully implemented to maximize the amount of raw waste volume processed in a batch for one of the salt-processing options at the Savannah River Site HLW complex. Parametric studies demonstrate that this optimization scheme provides a realistic approach for guiding the operation of HLW complexes. The optimization scheme is applicable to other sites in the nuclear waste complex (e.g., Hanford) and also for process industries where the dynamics are simulated using Aspen Technology's SPEEDUP software development package.
