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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.
Meeting Spotlight
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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
US, Korea sign MOU for nuclear cooperation
The U.S. departments of Energy and State have signed a memorandum of understanding with the Republic of Korea’s ministries of Trade, Industry and Energy and of Foreign Affairs for the two nations to partner on nuclear exports and cooperation.
Mei-Ya Wang, Tsung-Kuang Yeh
Nuclear Science and Engineering | Volume 180 | Number 3 | July 2015 | Pages 335-340
Technical Paper | doi.org/10.13182/NSE14-97
Articles are hosted by Taylor and Francis Online.
For further improvements on thermal efficiency and operation safety, reactor internal pumps, instead of conventional recirculation systems, are adopted in an advanced boiling water reactor (ABWR). With the novel design of internal circulation, the traveling path and pattern of the recirculated liquid coolant in an ABWR is actually different from that of the coolant in a conventional boiling water reactor. To ensure operation safety, optimization of the coolant chemistry in the primary coolant circuit (PCC) of a nuclear reactor is essential no matter what type or generation the reactor belongs to. For a better understanding of the water chemistry in an ABWR, such as the one being constructed in the northern part of Taiwan, and for safer operation of this ABWR, in this study we conducted a proactive, thorough water chemistry analysis prior to the completion of this reactor. A well-developed computer code was used to investigate the effectiveness of hydrogen water chemistry (HWC) on the redox species concentrations and electrochemical corrosion potential (ECP) behavior of components in the PCC of the Lungmen ABWR in Taiwan. Our analyses indicated that the effective oxidant concentrations at the top of the downcomer location would be expected to be >100 ppb at 0.5 ppm [H2]FW at the original rated power. While an effective ECP reduction at 0.4 ppm [H2]FW was observed at the downcomer outlet, a 2.0 ppm [H2]FW was not enough to reduce the ECP below the Ecrit at the upper plenum outlet. In summary, the effectiveness of HWC in the PCC of an ABWR is expected to vary from location to location and eventually from plant to plant due to different degrees of radiolysis and physical dimensions in different ABWRs.
