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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.
J. K. Long
Nuclear Technology | Volume 6 | Number 2 | February 1969 | Pages 116-126
Technical Paper and Note | doi.org/10.13182/NT69-A28242
Articles are hosted by Taylor and Francis Online.
This study of EBR-II operating behavior, which began with a reexamination of the thermal analysis of fuel pins under varying rates of coolant flow, incorporates the recent interpretations of the bowing behavior of the subassemblies. The nonlinear bowing effects are combined with the linear expansion effects in equations that express the power-reactivity decrement as a function of both power and flow. Comparison with experiments indicates agreement to within a few inhours. Differentiation of the equations leads to expressions for power and flow coefficients of reactivity. The reduced flow data are used to determine an effective average thermal expansion coefficient for the fuel.
