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
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
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. James, Gregg A. Morgan
Fusion Science and Technology | Volume 71 | Number 3 | April 2017 | Pages 321-325
Technical Paper | doi.org/10.1080/15361055.2017.1291245
Articles are hosted by Taylor and Francis Online.
Various getter materials are used in the processing of hydrogen isotopes and associated impurities. SAES® ST198 is a zirconium-iron alloy that is typically used for the removal of low levels of hydrogen isotopes from a process gas stream. However, numerous impurities may be present in process gas streams and some of these impurities may have a deleterious effect on the hydrogen absorption capabilities of ST198.
A series of experiments were completed to determine the effects of various impurities on the hydrogen gettering ability of ST198 as a function of the bed operating temperature. Changes in hydrogen getter performance were tracked using the analysis of Residual Gas Analyzer data. Baseline conditions of 0.1% hydrogen within a nitrogen rich stream were evaluated at both 350°C and ambient temperature conditions (24°C). Various concentrations of impurities were also explored to determine the effects on the hydrogen gettering of ST198. It has been determined that one benefit of ST198 is that it shows no appreciable interaction with nitrogen at temperatures lower than 425°C. However, gas impurities of carbon monoxide, methane, and ammonia were shown in this work to have an effect on the hydrogen gettering abilities of ST198.
This paper presents findings relating to the evaluation of the effect of carbon monoxide, ammonia, and methane impurities on the hydrogen gettering ability of the ST198. Lower operating temperature conditions made the ST198 getter bed more susceptible to deactivation in the presence of impurities. In the event that the studied impurities exist in the process gas stream, the ST198 material could possibly become deactivated towards hydrogen isotope absorption at lower operating temperatures.