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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. A. Fleck, Jr.
Nuclear Science and Engineering | Volume 2 | Number 5 | September 1957 | Pages 694-708
Technical Paper | doi.org/10.13182/NSE57-A25437
Articles are hosted by Taylor and Francis Online.
The linearized hydrodynamic equations governing the expansion of a frictionless compressible coolant from a cylindrical untapered reactor core admit an exact solution. The pressure so obtained depends only on the time required for an acoustic signal to travel from the core boundary to the core center and is quite independent of the amount of fluid external to the reactor. The pressure should behave similarly in the case of moderate tapering of the core. In the case of extreme tapering it is necessary to consider the external fluid as incompressible. In this case it is possible to obtain an approximate solution for the pressure, which does depend on the amount of external fluid.
