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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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International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver 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
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Muhammad Munir, Nasir Ahmad
Nuclear Science and Engineering | Volume 152 | Number 3 | March 2006 | Pages 314-319
Technical Paper | doi.org/10.13182/NSE06-A2585
Articles are hosted by Taylor and Francis Online.
Nitrogen-16 is produced in the coolant of water-cooled reactors from the 16O(n,p)16N reaction, and its rate of generation increases with an increase in reactor power level. Therefore, measurement of gamma rays emitted by 16N in the primary coolant can be used to monitor the reactor power level. Measurements have been made with a locally fabricated argon-filled three-electrode ionization chamber. The (I, V) characteristics of the chamber filled with argon have been studied with 16N gamma rays at the Pakistan Research Reactor-1 (PARR-1). The ionization current was measured at 1-, 3-, 5-, 7-, and 10-MW power levels. The measured ionization current was found to increase linearly with the power level. The plateau region of the chamber was observed to start at an applied voltage of 400 V, and the chamber operating voltage was found to be 600 V at an argon gas pressure 1.38 MPa. An empirical relation between reactor power and ionization current was developed. The (1/I, 1/V) and (I, 1/V2) curves elucidate the initial and volume recombination losses, respectively. The volume recombination losses were found to be relatively smaller than the initial recombination losses. These losses were found to increase with increasing power level. However, the increase in the initial recombination losses was slightly greater than the volume recombination losses.
