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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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Latest News
Wright officially sworn in for third term at the NRC
The Nuclear Regulatory Commission recently announced that David Wright, after being nominated by President Trump and confirmed by the Senate, was ceremonially sworn in as NRC chair on September 8.
This swearing in comes more than a month after Wright began his third term on the commission; he began leading as chair July 31. His term will conclude on June 30, 2030.
E. Hohmann, S. Safai, Ch. Bula, R. Lüscher, C. Harm, S. Mayer, O. Morath, E. Pedroni, S. Zenklusen
Nuclear Technology | Volume 175 | Number 1 | July 2011 | Pages 77-80
Technical Paper | Special Issue on the 16th Biennial Topical Meeting of the Radiation Protection and Shielding Division / Radiation Protection | doi.org/10.13182/NT11-A12273
Articles are hosted by Taylor and Francis Online.
Proton therapy is a widely used method of cancer treatment. Undesired secondary particles such as neutrons accompany the irradiation. Depending on the measurement position, the expected main dose contribution due to undesired secondary particles arises from neutrons with energies >20 MeV. Conventionally used Andersson and Braun-type survey instruments may underestimate the ambient dose equivalent up to a factor of 2 due to their limited response for high-energy neutrons. Therefore, it is desirable to investigate the neutron stray field in conditions comparable to therapy treatment, in particular the resulting dose to equipment placed in the treatment vault to estimate possible consequences to its operation. The irradiation of a water phantom with 200-MeV protons adequately reproduces these conditions.
