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
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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
Apr 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
May 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Framatome signs contracts with Sizewell C
French nuclear developer Framatome is slated to deliver key equipment for Sizewell C Ltd.’s two large reactors planned for the United Kingdom’s Suffolk coast.
The agreement, reportedly worth multiple billions of euros, was announced this week and will involve Framatome from the design phase until commissioning. The company also agreed to a long-term fuel supply deal. Framatome is 80.5 percent owned by France’s EDF and 19.5 percent owned by Mitsubishi Heavy Industries.
David W. Esh, Barry E. Scheetz
Nuclear Technology | Volume 137 | Number 3 | March 2002 | Pages 241-251
Technical Paper | Radioactive Waste Management and Disposal | doi.org/10.13182/NT02-A3271
Articles are hosted by Taylor and Francis Online.
The chemical and mineralogical conditions of the near-field, i.e., that area in the vicinity of the waste materials, may be significantly altered from ambient conditions by thermohydrological processes resulting from the placement of heat-generating radioactive materials in a geologic repository. Models are developed linking the thermohydrological effects simulated with TOUGH2 to a nonreactive aqueous species (chloride). Perturbations in near-field chemistry from the ambient conditions may have potential impacts on engineered barrier system (EBS) performance, waste-form degradation processes, and radionuclide transport. The results of thermohydrological simulations with TOUGH2 utilizing various conceptual models for fracture representation are coupled to simple chemical models (density and osmotic effects are neglected) to demonstrate the complexity and potential magnitude of thermohydrochemical (T-H-C) processes. The concentration of chloride in solution returning to the EBS following dryout, in extreme cases, is predicted to exceed 100 000 mg/l. The dimensionality of the problem and the rate at which the tuffaceous rocks rewet significantly affect the magnitude of the thermohydrological impact on chloride redistribution. A process metric (initial rewetting rate and distribution) that is ignored when evaluating thermohydrological response is very important when a more complex coupling (T-H-C) is considered.