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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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Update: Senate includes $250k for EPA generic repository
The U.S. Senate’s proposed Department of the Interior funding package provides $250,000 to develop a generic, technology-neutral standard for future high-level nuclear waste disposal facilities.
The goal is for the Environmental Protection Agency to use modern and international practices in creating new plans to store U.S. nuclear waste. This spring, the EPA had requested $635,000 to fund this work—but even the proposed $250,000 would help get the process moving.
So far, funding has been included only in the Senate’s version of the appropriations bill, but supporters hope it makes the final package when Senate and House lawmakers conference on the final fiscal year 2025 appropriations legislation this fall.
For more details, see the original story below from June 28.
R. Krieg, T. Malmberg, G. Messemer, T. Stach, E. Stratmanns
Nuclear Technology | Volume 111 | Number 3 | September 1995 | Pages 369-385
Technical Paper | A New Light Water Reactor Safety Concept Special / Nuclear Reactor Safety | doi.org/10.13182/NT95-A15867
Articles are hosted by Taylor and Francis Online.
The most severe consequence of a pressurized water reactor in-vessel steam explosion is a molten fuel slug impact against the head of the reactor pressure vessel that could cause a failure of this head and lead to missiles endangering the reactor containment. An investigation is described that attempts to determine the maximum slug impact that a vessel head is capable of withstanding without failing and, consequently, without impairing the containment safety-related function. Preliminary theoretical assessments are presented that suggest that the head might be able to withstand rather strong impacts and that the shape of the fuel slug will have only a moderate influence on the results, provided the upper internal structures are taken into account. A low sensitivity against the slug shape is an essential prerequisite for a reliable safety proof. However, investigations primarily based on computational models are not sufficient; therefore, an investigation concept is proposed that relies on model experiments in which the geometry is scaled down by factors of 10 and 20, respectively. Theoretical and experimental investigations for liquid-structure impact problems in different scales are discussed to assess the degree of similarity that can be obtained. Finally, model experiments are described in some detail simulating the molten fuel slug impact on the vessel head.