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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
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.
Shigeo Yoshida, Isao Murata, Akito Takahashi
Fusion Science and Technology | Volume 34 | Number 3 | November 1998 | Pages 656-660
Safety and Environment (Poster Session) | doi.org/10.13182/FST98-A11963689
Articles are hosted by Taylor and Francis Online.
In the Intense 14 MeV Neutron Source Facility OKTAVIAN of Osaka University, Japan, which produces fusion neutrons by D-T reaction, we have many experience in handling tritium targets and tritiated contaminants. In OKTAVIAN, the transition of tritium concentration in urine and exhaled water of some workers was measured with a liquid scintillation counter for years. Using the measured results between the concentration of tritium in urine and in exhaled water, we have found a simple method to lead excretion parameters in order to estimate the internal exposure dose. The first decreasing term, HTO component, was expressed as a simple exponential function with the measured concentration of HTO in exhaled water. The second and third decreasing terms, OBT component, were expressed as a sum of two exponential functions using the difference between the concentration of HTO in exhaled water and the total tritium concentration in urine in equilibrium. And the excretion function of total tritium in urine can be expressed as a sum of their three exponential decreasing terms. Moreover, without measurements of longer-term, it becomes possible to analyze the longer half-life in OBT component at a short time.
