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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.
R. Böhme, H. Seufert
Nuclear Technology | Volume 7 | Number 6 | December 1969 | Pages 494-504
Reactor | doi.org/10.13182/NT69-A28368
Articles are hosted by Taylor and Francis Online.
An absolute determination of uranium reaction rates by means of foil irradiation was carried out in the Fast Zero Power Reactor SNEAK, assembly 3A-2 This requires the measurement of reactionrate traverses as well as their fine structure. These rate distributions were compared with transport and diffusion calculations. The traverse measurements indicate a strong dependence of the axial “buckling” (relative second derivative of the rates) on energy. The calculations with the Karlsruhe SNEAK cross-section set and the Russian ABN set yield these bucklings for 238U capture and 235U fission in diffusion approximation on the average 5% higher than measured. Only the fast-fission rate distribution of 238U is almost correctly calculated using the cross-section sets. The ratio of total plutonium production to 235u fission along the z axis was measured and compared with theory. It agrees within the error limits of the experiment. Beyond the error limits are the discrepancies found for the spectral index σƒ28/σƒ25 The fine structure of reaction rates within the fuel platelets is well described by an integral transport code, but again, there are considerable discrepancies between calculated and measured fission-rate ratios.
