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
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
Meeting Spotlight
2024 ANS Winter Conference and Expo
November 17–21, 2024
Orlando, FL|Renaissance Orlando at SeaWorld
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
Aug 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
October 2024
Nuclear Technology
Fusion Science and Technology
August 2024
Latest News
New laws offer nuclear industry incentives for existing power plant uprates
This year, the U.S. nuclear industry received a much-needed economic boost that could help preserve operating nuclear power plants and incentivize upgrades that extend their lifespan and power output.
Signed into law in 2022, the Inflation Reduction Act offers production tax credits (PTCs) for existing nuclear power plants and either PTCs or investment tax credits (ITCs) for new carbon-free generation. These credits could make power uprates—increasing the maximum power level at which a commercial plant may operate—a much more appealing option for utilities.
H.F. Lucas, F. Markun
Nuclear Science and Engineering | Volume 99 | Number 1 | May 1988 | Pages 82-87
Technical Note | doi.org/10.13182/NSE88-A23546
Articles are hosted by Taylor and Francis Online.
A procedure has been developed for preparing 3- to 9-ℓ volumes of air under natural conditions with a known concentration of 222Rn to be used for calibrating radon systems. Air is passed into a plastic bag through a standard 226Ra solution (prepared by the U.S. National Bureau of Standards) contained in an emanation flask. This plastic bag retains 222Rn with little loss into or through the bag walls. The mean ratios of the 222Rn in the air at 2 and 7 days after filling to that immediately after filling were 0.992 ± 0.006 and 0.969 ± 0.008, which suggests a rate of radon loss into the bag of 0.4 ± 0.1%/day. The air from the bag was used to calibrate six Lucas chambers. Each chamber was calibrated 11 times with an average fractional standard error of the mean of 0.5%. This value is greater than the 0.2% expected from counting errors alone and suggests that the entire calibration procedure plus the counting system introduces a systematic standard deviation of 1.4% for each individual calibration and counting procedure. The bag and calibrated counters can also be used to determine the 226Ra and the 222Rn content of water. In addition, by replacing the air with other flush gases, calibration factors for gas mixtures other than air can be determined. The accuracy of these calibrations was verified by comparison with four methods, three of which are completely independent. The results by all four methods agree within ±1%.