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.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
Jul 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
John F. Carew, David J. Diamond
Nuclear Technology | Volume 50 | Number 3 | October 1980 | Pages 252-256
Technical Paper | Fuel | doi.org/10.13182/NT80-A32528
Articles are hosted by Taylor and Francis Online.
An evaluation of the relationship between operating limit uncertainty allowance and fuel performance has been made. A simple analytic relation between uncertainty allowance and the number of fuel rods exceeding fuel limits due to measurement uncertainties has been derived. An evaluation of this relation for selected and bounding power distributions indicates that the expected fraction of the core challenging fuel limits is strongly dependent on (a) the operating power distribution and (b) the estimates of measurement uncertainties used in determining the operating limit uncertainty allowance. Also, the various (1-sigma, 2-sigma, 95/95, etc.) criteria used in selecting uncertainty allowance are found to differ significantly in terms of the number of rods that exceed fuel limits.
