Implementing the Final Status Survey Approach in Draft Regulatory Guide DG-4006


S. A. McGuire


In implementing the method described in DG-008, licensees have encountered a number of questions and problems that do not seem to be fully or clearly dealt within either DG-008 or MARSSIM. This paper discusses some of those questions and problems. Among the topics discussed are: (1) how to account for background in a room when the room contains different materials, each with significantly different background; (2) how to select the number of samples needed when scanning cannot be done; (3) how large can a Class 1 survey unit really be; (4) how much detail on the final status survey should be included in a decommissioning plan or license termination plan; (5) what is acceptable in terms of quality control sampling; (6) how to determine minimum detectable concentrations that include consideration of absorption within the surface and surveyor efficiency; and (7) how to conduct surveys for subsurface residual radioactivity.


This abstract was presented at the 33rd Annual Midyear Meeting, "Instrumentation, Measurements, and Electronic Dosimetry", Abstracts Session, 1/30/2000 - 2/2/2000, held in Virginia Beach, VA.

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