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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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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.
J. Maisonneuve, T. Oda, S. Tanaka
Fusion Science and Technology | Volume 60 | Number 4 | November 2011 | Pages 1507-1510
Interaction with Materials | Proceedings of the Ninth International Conference on Tritium Science and Technology (Part 2) | doi.org/10.13182/FST11-A12718
Articles are hosted by Taylor and Francis Online.
The stability of hydrogen atoms trapped in vacancy clusters of a bcc iron structure is investigated by molecular statics calculations of the hydrogen binding energy to these clusters. The configurations having a minimum potential energy are obtained from the relaxation of a large number of different initial atomic configurations. Calculations of hydrogen binding energy to a mono-vacancy illustrate a relatively large gain of energy in trapping up to two hydrogen atoms in a monovacancy and the increasing difficulty to trap additional atoms due to hydrogen mutual repulsion. Comparison with ab-initio reference calculations of the hydrogen binding energy shows good agreement for up to three trapped hydrogen atoms. Based on the calculations conducted on the most stable vacancy-hydrogen complexes containing two to six vacancies, the maximum capacity of hydrogen atoms per vacancy was found to decrease with the size of vacancy cluster. The calculations of hydrogen binding energies to these clusters show that trapping two hydrogen atoms per vacancy is still a particularly favorable process for vacancy clusters.