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Division Spotlight
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.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
Standards Program
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
NRC v. Texas: Supreme Court weighs challenge to NRC authority in spent fuel storage case
The State of Texas has not one but two ongoing federal court challenges to the Nuclear Regulatory Commission that could, if successful, turn decades of NRC regulations, precedent, and case law on its head.
R. P. Matsen
Nuclear Technology | Volume 15 | Number 3 | September 1972 | Pages 343-358
Technical Paper | Reactor | doi.org/10.13182/NT72-A16032
Articles are hosted by Taylor and Francis Online.
A technique for obtaining cross-section information from experimental isotopic concentration data has been applied to the data from Yankee Core I. The technique involves making a least-squares fit of appropriate transmutation equations to the data. The analysis covers two transmutation chains. One is the plutonium chain which begins with 238U and ends with americium and curium. The other is a rarer isotope chain which begins with 235U or 238U and ends with neptunium and plutonium. Values were obtained for 12 ratios determined by the leastsquares analysis (e.g., 25 = 0.2569 ± 0.0023 and 49 = 0.622 ± 0.082). In order to obtain information about the less abundant transuranium isotopes, 15 Yankee Core I samples were analyzed for their isotopic content. The ratios of effective cross sections were also deduced from the data.
