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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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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.
Franco Vittorio Frazzoli, Alberto Magrini
Nuclear Technology | Volume 45 | Number 2 | September 1979 | Pages 177-182
Technical Paper | Instrument | doi.org/10.13182/NT79-A32308
Articles are hosted by Taylor and Francis Online.
A neutron gauge for the accurate determination of high mean void fractions in a water-steam mixture has been designed to operate on the transmission of a thermal-neutron beam obtained with a 252Cf neutron source coupled with a polyethylene howitzer. Calibrations, carried out with a Plexiglas-air combination simulating annular flow and core flow, show that the gauge is characterized by high sensitivity and precision with respect to the other radiation techniques. Taking into account the lack of calibration standards and the wide range of water and steam densities generally involved in heat transfer processes, we developed a mathematical model of the gauge response to obtain adequate performances for practical use. The model, which is valid in principle for any flow regime, is specialized here for annular flow, which is of interest for the foreseen application in heat transfer studies on an out-of-pile test facility.
