ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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!
Latest Magazine Issues
Jan 2025
Jul 2024
Latest Journal Issues
Nuclear Science and Engineering
February 2025
Nuclear Technology
January 2025
Fusion Science and Technology
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?
G. Schulze, H. Würz
Nuclear Technology | Volume 35 | Number 3 | October 1977 | Pages 663-670
Technical Paper | Technique | doi.org/10.13182/NT77-A31875
Articles are hosted by Taylor and Francis Online.
A determination of fissile material concentration in high-level radioactive solutions can be accomplished by measuring the source multiplication of an external neutron source. Computer calculations and laboratory experiments were used to demonstrate the applicability of the method to fissile material solutions containing unknown quantities of homogeneous neutron poison materials. A relation between the fissile material concentration Cfiss and the quantities thermal and epithermal leakage neutron fluxes measured with 235U fission chambers is derived. The accuracy obtained using a 252Cf neutron source of source strength 5 × 108 n/s, a measuring time interval of 20 s, and assuming Cfiss to be at least twice the minimum detectable concentration is better than 30%. This is adequate for application of the method for process control of pulsed columns in reprocessing plants.
