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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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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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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Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Max Aker, Marco Röllig
Fusion Science and Technology | Volume 76 | Number 3 | April 2020 | Pages 373-378
Technical Paper | doi.org/10.1080/15361055.2020.1712989
Articles are hosted by Taylor and Francis Online.
Beta-induced X-ray spectrometry (BIXS) is a promising method for activity monitoring of tritiated gas species. BIXS systems measure bremsstrahlung and characteristic X-rays generated by interactions of beta decay electrons with surfaces within the measurement chamber. BIXS and other highly sensitive methods such as ionization counting are limited in accuracy by the tritium memory effect, a preconditioning dependent background signal caused by the sorption of tritium on surfaces. In this work, different surface materials have been investigated aiming at reducing the tritium memory effect while providing a high bremsstrahlung yield. A modular BIXS setup was developed that allows the consecutive investigation of different measurement cells utilizing the same detector while protecting it from contamination during cell exchanges. An uncoated stainless steel cell was compared to cells coated with Au, Ir, Ti-W, Ti-Au-Al, and Ti-Au-Cu layer systems. The sample cells were repeatedly exposed to 1100 Pa of molecular tritium. The development of the resulting memory effect was measured during the evacuation between consecutive exposures. Additionally, the background signal decay was investigated in a long-term measurement after the last exposure. In this presentation, the measurement results of the relative tritium memory effect from various surfaces will be shown. The lowest memory effect was measured for the gold-coated sample cell, reaching a background signal equal to (0.83 ± 0.14)% of the signal during exposure after a total dosage of 21.33 × 104 Pa h.