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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
Thiagarajan Gnanasekaran, Kandhalu Hari Mahendran, Raghavachary Sridharan, Vedaraman Ganesan, Govindaswami Periaswami, Cherian K. Mathews
Nuclear Technology | Volume 90 | Number 3 | June 1990 | Pages 408-416
Technical Paper | RELAP/MOD2 / Material | doi.org/10.13182/NT90-A34404
Articles are hosted by Taylor and Francis Online.
An electrochemical hydrogen meter using a CaCl2-CaH2 electrolyte and a Li-LiH reference electrode was constructed and used to monitor dissolved hydrogen in liquid sodium. These meters have been tested in bench-top sodium loops equipped with cold traps for controlling hydrogen levels in sodium. The experimental results showed that the meters yield nearly theoretical outputs down to the lowest hydrogen levels that were achievable in these loops (∼ 50 ppb). The sensitivity of the meters for changes in hydrogen concentrations is adequate for use in the sodium circuits of a fast reactor to detect leaks of hydrogen bearing extraneous materials into sodium. These meters, along with a gas chromatograph, were also used to study the reaction of hydrocarbon oil with liquid sodium. The experimental results showed that for detecting oil leaks into sodium these meters provide a simpler alternative to monitoring of methane in the cover gas using a gas chromatograph.
