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
August 2025
Nuclear Technology
Fusion Science and Technology
Latest News
ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
K. H. G. Ashbee
Nuclear Technology | Volume 95 | Number 3 | September 1991 | Pages 366-371
Technical Note | Radioactive Waste Management | doi.org/10.13182/NT91-A34584
Articles are hosted by Taylor and Francis Online.
Whenever a volume expansion ΔV works against a confining pressure p, such as that which is generated by water of crystallization at encapsulated salts, it is appropriate to use Clapeyron’s equation to estimate the temperature coefficient of that pressure: where ΔVh and ΔSh are, respectively, the volume increase and the entropy decrease for any small increment of water of crystallization. The term ΔSh, and hence dp/dT, is negative because water molecules that take up crystal lattice sites are effectively immobilized. A negative dp/dT means that the confining pressure increases with decreasing temperature, and it is this feature that makes water of crystallization a particularly unwelcome phenomenon in decaying, and therefore cooling, radioactive waste.