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11 October 2008

Answer to Question #895 Submitted to "Ask the Experts"

Category: Instrumentation and Measurements — Surveys and Measurements (SM)

The following question was answered by an expert in the appropriate field:

Are neutron dose monitors suitable for pulsed accelerators available with new modified Q factors, dose-equivalent factors, etc.?

I am not aware of any U.S. manufacturers of neutron survey meters that use the "new" quality factors (that is the ICRP 60 values). In fact, they'd be reluctant to use them because neither the U.S. Nuclear Regulatory Commission nor the U.S. Department of Energy has adopted ICRP 60. We're still on ICRP 26 officially, and the quality factors are printed right in 10 CFR 20 and 10 CFR 835. Until the U.S. Environmental Protection Agency changes things, we couldn't use such an instrument for anything other than research purposes. In addition, pulsed radiation fields produce strange results in devices like recombination chamber- and TEPC-based instruments. Joseph C. McDonald

Answer posted on 22 May 2001. The information and material posted on this Web site is intended as general reference information only. Specific facts and circumstances may alter the concepts and applications of materials and information described herein. The information provided is not a substitute for professional advice and should not be relied upon in the absence of such professional advice specific to whatever facts and circumstances are presented in any given situation. Answers are correct at the time they are posted on the Web site. Be advised that over time, some requirements could change, new data could be made available, or Internet links could change. For answers that have been posted for several months or longer, please check the current status of the posted information prior to using the responses for specific applications.