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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.
Hideo Hirayama
Nuclear Science and Engineering | Volume 124 | Number 2 | October 1996 | Pages 258-270
Technical Paper | doi.org/10.13182/NSE96-A28576
Articles are hosted by Taylor and Francis Online.
The effects of using different photon cross-section libraries and energy-absorption coefficients on the gamma-ray point isotropic exposure buildup factors up to 40 mean free path (mfp) were studied using the EGS4 Monte Carlo code for water‚ iron, and lead from the 0.1- to 10-MeV energy regions., Differences due to the cross sections used exist‚ but are small‚ < 10%, except those for lead at 0.1 and 10 MeV. The differences in the case of lead increase along with an increase in the depth and are nearly 30% at 40 mfp depth. The effects of using different energy-absorption coefficients of air are <2%
