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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
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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Nuclear Science and Engineering
February 2025
Nuclear Technology
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Latest News
Reboot: Nuclear needs a success . . . anywhere
The media have gleefully resurrected the language of a past nuclear renaissance. Beyond the hype and PR, many people in the nuclear community are taking a more measured view of conditions that could lead to new construction: data center demand, the proliferation of new reactor designs and start-ups, and the sudden ascendance of nuclear energy as the power source everyone wants—or wants to talk about.
Once built, large nuclear reactors can provide clean power for at least 80 years—outlasting 10 to 20 presidential administrations. Smaller reactors can provide heat and power outputs tailored to an end user’s needs. With all the new attention, are we any closer to getting past persistent supply chain and workforce issues and building these new plants? And what will the election of Donald Trump to a second term as president mean for nuclear?
As usual, there are more questions than answers, and most come down to money. Several developers are engaging with the Nuclear Regulatory Commission or have already applied for a license, certification, or permit. But designs without paying customers won’t get built. So where are the customers, and what will it take for them to commit?
J. E. LeSurf, G. M. Allison
Nuclear Technology | Volume 29 | Number 2 | May 1976 | Pages 160-165
Technical Paper | Material | doi.org/10.13182/NT76-A31575
Articles are hosted by Taylor and Francis Online.
Experiments in reactor loops have established relationships among ammonia decomposition rate, ammonia and hydrogen concentrations, and energy deposition in boiling water. These relationships predicted an approximate ammonia decomposition rate in the 250-MW(e) CANDU-BLW, G-1 pres-sure-tube reactor of 20 g NH3/h per MW(th), 25% less than the total loss rate measured on the reactor. When the ammonia concentration in the water phase at exit from the reactor channels is kept above 7 mg/kg, the nitrate concentration in the recirculating water is ≈0.1 mg/kg and oxygen is <10 µg/kg- Experiments in the Halden Boiling Heavy Water Reactor demonstrated that the method is applicable to pres sure-vessel reactors, but larger decomposition rates of ammonia will occur. Other factors to consider are large volumes of N2 and H2 to the off-gas system, increased radiation fields around the turbine, and reduced efficiency of ion-exchange resins.
