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
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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
May 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
June 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Retrieval of nuclear waste canisters from a borehole
Borehole disposal of spent nuclear fuel (SNF) and high-level waste (HLW) uses off-the-shelf directional drilling technology developed and commercialized by the oil and gas sectors. It is a technology that has been gaining traction in recent years in the nuclear industry. Disposal can be done in one or more boreholes (including an array) drilled into suitable sedimentary, igneous, or metamorphic host rocks. Waste is encapsulated in specialized corrosion-resistant canisters, which are placed end to end in disposal sections of relatively small-diameter boreholes that have been cased and fluid-filled. After emplacement, the vertical access hole is plugged and backfilled as an engineered barrier.
Zhengming Zhang, Shuyan He
Nuclear Technology | Volume 160 | Number 2 | November 2007 | Pages 178-186
Technical Paper | Fission Reactors | doi.org/10.13182/NT07-A3891
Articles are hosted by Taylor and Francis Online.
This paper studies one of the key aspects in the leak-before-break technique: the leak rate of a gas medium through penetrated cracks. The focus is on the results of theoretical studies. Based on the need for easy use in engineering calculation, two analytical models have been developed for the calculation of the leak rate of a gas medium. The first model is the isentropic flow model, which supposes that the gas flowing through the penetrated crack can be treated as isentropic flow. This model has theoretical solutions and can be applied easily, but it will overpredict the leak rate of a gas medium because it does not take the friction and other disturbances into consideration. The second model is the transient flow model, which only supposes that the gas flowing through the penetrated crack can be simplified as one-dimensional flow. This model can take the most influential factors of the gas flow into consideration. These factors include the variation of upstream pressure, various kinds of pressure losses during gas flow, and the heat exchange between the gas and the outside structures. The results of numerical simulations show that the transient flow model is suitable for engineering practices.