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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
T. Roger Billeter, D. P. Brown, W. G. Spear
Nuclear Technology | Volume 6 | Number 1 | January 1969 | Pages 73-80
Technical Papers and Note | doi.org/10.13182/NT69-A28270
Articles are hosted by Taylor and Francis Online.
Techniques and instrumentation at microwave frequencies show promise for measuring both temperature and gas coolant impurities within high-temperature nuclear reactors. Temperature is measured as a result of the thermal expansion of a metallic sensor, while impurities can be detected by their effect upon the coolant dielectric constant. An experimental Ni-Cr steel microwave cavity, resonant at 15 GHz, yielded a linear output signal for variations of temperature to 1250°C with a sensitivity of 330 kHz/°C. For gas coolant impurity measurements, both a microwave cavity method and a phase-shift method provided desired speed of response and sensitivity. Tests with the interferometer-type impurity measuring instrument indicate a sensitivity of ∼ 4 × 10−4 degrees phase shift/[(ppm)m] for water vapor in helium gas and a time constant of 1 sec for step changes in impurity content.