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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
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott Downtown
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!
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Former NRC commissioners lend support to efforts to eliminate mandatory hearings
A group of nine former nuclear regulatory commissioners sent a letter Wednesday to the current Nuclear Regulatory Commission members lending support to efforts to get rid of mandatory hearings in the licensing process, which should speed up the process by three to six months and save millions of dollars.
Byung-Gil Ahn, Hwan-Seo Park, In-Tae Kim, Han-Soo Lee
Nuclear Technology | Volume 173 | Number 3 | March 2011 | Pages 300-309
Technical Paper | Radioactive Waste Management and Disposal | doi.org/10.13182/NT11-A11663
Articles are hosted by Taylor and Francis Online.
The waste generated from a pyrochemical process to recover uranium and transuranic elements has been one of the problematic wastes because of high volatility and low compatibility with silicate glass. For the minimization of final waste, an oxidative precipitation by sparging oxygen has been under development, and the waste containing rare earth oxides (REOs) and volatile salt is expected to be generated. This study intended to find a way to immobilize these kinds of wastes under the limitations of a processing temperature ([approximately]1200°C) and a waste loading ([approximately]20 wt%). From a series of consolidation experiments, it was induced that Ca-rich silicate glass is effective in consolidating the REOs at relatively low temperature. Based on this result, CaO-SiO2-P2O5 (CaPS) was designed to provide a way to control the volatility of waste and to avoid glass effects in the consolidation at a given temperature. By using a CaPS, REOs were consolidated, regardless of glass composition. At a high content of metal chlorides, CaPS can control the volatility up to 1200°C, but it has a low ability to immobilize alkali metal elements. For this, SiO2-Al2O3-P2O5 (SAP) was suggested to treat LiCl-KCl salt in precipitate. This composite can also control the volatility up to 1200°C, and it converted the REOs into monazite at 650°C, where the entire metal elements in chloride form are changed into relatively stable compounds. The leach test by the product consistency test-method A confirmed the immobilization ability of SAP for waste with a high content of metal chlorides. In conclusion, this study suggests the approach concept to treat a waste containing volatile compounds. For a lower content of metal chloride, CaPS are more favorable, and for a high content of metal chlorides, SAP is more effective to fabricate a wasteform for final disposal.
