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
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
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
College students help develop waste-measuring device at Hanford
A partnership between Washington River Protection Solutions (WRPS) and Washington State University has resulted in the development of a device to measure radioactive and chemical tank waste at the Hanford Site. WRPS is the contractor at Hanford for the Department of Energy’s Office of Environmental Management.
Hideyuki Hosokawa, Makoto Nagase, Motomasa Fuse, Yutaka Watanabe
Nuclear Science and Engineering | Volume 175 | Number 2 | October 2013 | Pages 135-148
Technical Paper | doi.org/10.13182/NSE12-80
Articles are hosted by Taylor and Francis Online.
The formation process of a ferrite oxide film (which can effectively suppress radioactive nuclide deposition on piping surfaces) was evaluated from the viewpoints of forming optimum film structures and reducing waste disposal. Both pH and oxidation-reduction potential (ORP) of ferrite film formation solution were found to be important, and the film formation process could be understood on the basis of a Pourbaix diagram of the iron-water system. To make a thin and closely packed oxide film, the pH and ORP values should be maintained within the magnetite stability domain by controlling the hydrazine concentration, which promotes the film formation reactions. Use of chemical solutions such as formic acid and hydrazine was confirmed to get catalyst decomposition into easily handled substances. This film formation process could be evaluated taking into consideration the charge balance and chemical equilibrium equations of each reaction involved in the film formation. It was clarified that preoxidation of the ferrite film under certain oxidizing water chemistry conditions (such as normal water chemistry) in boiling water reactors could further improve the film cobalt deposition suppression performance due to the formation of hematite. Our selected film forming process and waste solution decomposition conditions were confirmed using the simulated flow system apparatus of one-tenth actual plant scale. The method was applied to the actual plant just after the chemical decontamination. After one cycle elapsed, dose rate of the reactor recirculation system piping coated with ferrite film was half that before the ferrite film was formed.