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 N. Rosholt
Nuclear Technology | Volume 51 | Number 2 | December 1980 | Pages 143-146
Technical Paper | Argonne National Laboratory Specialists’ Workshop on Basic Research Needs for Nuclear Waste Management / Radioactive Waste | doi.org/10.13182/NT80-A32593
Articles are hosted by Taylor and Francis Online.
Extensive studies conducted during the past two decades regarding the behavior of 238U and its decay products in the geologic environment have shown that radioactive disequilibrium in the 238U decay series is a common phenomenon. The daughter products 234U and 230Th are especially useful as indicators of processes affecting uranium migration because of their relatively long half-lives and contrasting chemical behavior. A striking variability in 234U/238U ratios occurs in zeolitically altered volcanic tuff investigated in this study. Results indicate that initial preferential emplacement of 234U by adsorption-alpha recoil mechanisms gradually was overwhelmed by preferential displacement of 234U by leaching-alpha recoil mechanisms. The data provide guidelines for predicting the behavior of chemically analogous members of the 237Np decay series (233U, 229Th) in the natural environment following geologic disposal of radioactive wastes.
