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Fusion Science and Technology
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GAO: Clarification of HLW definition could save DOE billions
A clearer definition of what constitutes high-level radioactive waste could save the Department of Energy’s Office of Environmental Management “tens of billions of dollars” in waste management costs and accelerate its cleanup schedule by decades, according to a report by the U.S. Government Accountability Office.
DOE-EM’s efforts to manage waste resulting from legacy spent nuclear fuel reprocessing have been hindered for decades by the ambiguity of the statutory definition of HLW as laid out in the Atomic Energy Act and Nuclear Waste Policy Act, the report states. While admitting that the DOE has taken steps to overcome this ambiguity, the GAO says that the department has not fully evaluated all available opportunities to treat and dispose of waste more economically as either transuranic or low-level radioactive waste.
Satoshi Sato, Yasushi Seki, Romano Plenteda, Takashi Inoue, Davide Valenza, Robert T. Santoro, Hiromasa Iida, Hideyuki Takatsu, Kohbun Yamada, Yoshihiro Ohara, Toshihisa Utsumi
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 1002-1007
Neutronics Experiments and Analysis (Poster Session) | doi.org/10.13182/FST98-A11963744
Articles are hosted by Taylor and Francis Online.
Shielding analyses of the ITER neutral beam injector (NBI) ports have been performed using three-dimensional Monte Carlo and two-dimensional discrete ordinates Sn methods. The biological dose rates inside the cryostat after reactor shutdown are expected to be lower than design target of 100 μSv/h for the current NBI reference design with ∼60 cm thick NBI port walls. It was also observed that the total nuclear heating in the toroidal field (TF) coils satisfies the design limit of 17 kW when the port wall is 40 cm thick. The Sn calculations, performed using a rectangular model of the NBI, overestimate the dose rates at the cryostat and nuclear heating in TF coils by factors of ten and two, respectively, compared to Monte Carlo results obtained using a more accurate representation of the NBI system.
