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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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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?
Ronald J. Lipinski, John E. Gronager, Michel Schwarz
Nuclear Technology | Volume 58 | Number 3 | September 1982 | Pages 369-378
Technical Paper | Fission Reactor | doi.org/10.13182/NT82-A32972
Articles are hosted by Taylor and Francis Online.
Received November 3, 1981 Accepted for Publication Feburary 24, 1982 The results of a fission-heated sodium-U02 particle bed heat removal experiment (D-4) are presented and the effects of cooling the overlying sodium below saturation are discussed. Single-phase convection began at a Rayleigh number an order of magnitude smaller than for water. Bed disturbances were observed to occur at the onset of boiling, but only after a previous boiling cycle. The disturbances are believed to be due to the flashing of superheated liquid sodium after noncondensable gases had been removed during a previous boiling cycle. The start of bed dryout was observed with two different overlying sodium temperatures (300 and 600°C). The dryout power was 0.77 kW/kg with 300°C overlying sodium (and 29 kPa pressure) and 3.58 kW/kg with 600°C sodium (and 43 kPa). It is believed that cold overlying sodium reduces the large heat-removal capability of shallow beds by causing vapor condensation within the bed and suppressing channel formation. Steady-state temperatures above the boiling temperature were observed at the bed bottom for several power levels above the incipient dryout power, indicating stable dry zones.
