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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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Nuclear Science and Engineering
Fusion Science and Technology
American Nuclear Society supports IAEA’s condemnation of attack on Ukraine nuclear power plant
Statement from American Nuclear Society President Steven Arndt and Executive Director and CEO Craig Piercy:
Kenzo Munakata, Akinori Koga, Yoshihiro Yokoyama, Seigo Kanjo, Satoshi Yamatsuki, Dmitri Ianovski, Masabumi Nishikawa
Fusion Science and Technology | Volume 41 | Number 3 | May 2002 | Pages 1064-1068
Blanket Material and Process | Proceedings of the Sixth International Conference on Tritium Science and Technology Tsukuba, Japan November 12-16, 2001 | dx.doi.org/10.13182/FST02-A22747
Articles are hosted by Taylor and Francis Online.
In most current designs of D-T fusion reactor blankets employing ceramic breeder materials, the use of a helium sweep gas containing 0.1 % of hydrogen is contemplated to extract tritium efficiently via isotopic exchange reactions. However, the isotope exchange reaction proceeds fast only at the more elevated temperatures, so that the rate of isotope exchange reactions is considerably low at lower temperatures. Taking into consideration that there is a broad temperature distribution within a blanket module, it is anticipated that the tritium bred in regions of lower temperatures will be poorly recovered. For this reason, there is still a need to develop techniques that contribute to the acceleration of the recovery of bred tritium at lower temperatures. In our previous works, the effect of catalytic active metal additives, such as Pt and Pd, on the heterogeneous isotope exchange reactions at the breeder-sweep gas interface was examined. The results indicate that the exchange reactions were considerably enhanced with the help of catalytic metals. In this work, the authors first examined the effect of the amounts of deposited catalytic active metal additives, such as Pt and Pd, on the heterogeneous isotope exchange reactions at the breeder-sweep gas interface. The results of this works indicate that the exchange reaction on the surface of Li4SiO4 is enhanced even if the amount of deposited Pd is as low as 0.015 %. It was also found that the deposition of 0.15 wt% of Pt enhances the exchange reaction rate. The authors also examined the effect of non-noble metal additive, such as Ni, on the heterogeneous isotope exchange reactions at the breeder-sweep gas interface. The results indicate that the exchange reactions were considerably enhanced with the help of Ni. Thus, it was found that Ni is also effective for the enhancement of the exchange reaction rate.