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Nuclear Nonproliferation Policy
The mission of the Nuclear Nonproliferation Policy Division (NNPD) is to promote the peaceful use of nuclear technology while simultaneously preventing the diversion and misuse of nuclear material and technology through appropriate safeguards and security, and promotion of nuclear nonproliferation policies. To achieve this mission, the objectives of the NNPD are to: Promote policy that discourages the proliferation of nuclear technology and material to inappropriate entities. Provide information to ANS members, the technical community at large, opinion leaders, and decision makers to improve their understanding of nuclear nonproliferation issues. Become a recognized technical resource on nuclear nonproliferation, safeguards, and security issues. Serve as the integration and coordination body for nuclear nonproliferation activities for the ANS. Work cooperatively with other ANS divisions to achieve these objective nonproliferation policies.
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February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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Wyoming OKs construction of TerraPower’s Natrium plant
Progress continues for TerraPower’s Natrium plant, with the latest win coming in the form of a state permit for construction of nonnuclear portions of the advanced reactor.
R. C. Lloyd, S. R. Bierman, E. D. Clayton, B. M. Durst
Nuclear Science and Engineering | Volume 78 | Number 2 | June 1981 | Pages 121-125
Technical Paper | doi.org/10.13182/NSE81-A20098
Articles are hosted by Taylor and Francis Online.
A series of experiments was performed to determine the effect of gadolinium as a soluble neutron absorber on the criticality of fuel rod assemblies in uranyl nitrate solution. The gadolinium in the form of Gd(NO3)s was mixed with uranyl nitrate solution. The lattice assemblies were composed of 4.3 wt% 235U-enriched UO2 pellets contained in stainless steel tubes immersed in the uranyl nitrate solution of the same 235U enrichment. Lattice assemblies with center-to-center fuel rod separations of 22.9, 27.9, and 33.0 mm were utilized in this study. In each case, a preset number of fuel rods was positioned in the assembly vessel and uranyl nitrate subsequently added, with the measurement then being of the depth of solution required for criticality. The uranyl nitrate was limited to the fuel-rod-bearing region of the lattice assemblies that were, in turn, reflected with water. Data on integral critical experiments are provided against which calculational techniques can be checked.
