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30 July 2010

Answer to Question #2888 Submitted to "Ask the Experts"

Category: Policy, Guidelines, and Regulations — Policy and Cost-Benefit Issues

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

I was researching a variety of documents while developing local training presentations at my place of employment. I believe I may have found a discrepancy in ANSI/HPS N13.49-2001 Performance and Documentation of Radiological Surveys. Section 4.3.2.1 MDCs for Surface Activity Assessment-Static Measurements states in the MDC equation [equation (4), page 16], a term in the numerator which conflicts with other publications commonly available. Time-background under the radical and outside the (1 + Time-sample/Time-background) I think may be in error and should be the sample count time and not the background count time. If the standard is correct, please direct me to the appropriate references.

The answer to this question requires an equation and, therefore, is presented in a PDF file. Download the following Portable Document Format file to view the answer to your question: q2888.pdf

Answer posted on 26 August 2003. 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.