Secondary Logo

Journal Logo

Institutional members access full text with Ovid®

Techniques to Alleviate Nuisance Alarms Observed by PCMs Following 222Rn-Progeny Deposition on Clothing

Justus, Alan L.*

doi: 10.1097/HP.0000000000000263
Operational Topics

This paper presents technically-based techniques to deal with nuisance personnel contamination monitor (PCM) alarms. The techniques derive from the fundamental physical characteristics of radon progeny. Some PCM alarms, although valid alarms and not actually “false,” could be due to nuisance naturally-occurring radionuclides (i.e., radon progeny). Based on certain observed characteristics of the radon progeny, several prompt techniques are discussed that could either remediate or at least mitigate the problem of nuisance alarms. Examples are provided which demonstrate the effective use of the techniques.

*Los Alamos National Laboratory (LANL), Los Alamos, NM 87545.

The author declares no conflicts of interest.

Alan Justus has been a DOE national laboratory health physicist since 1981, first at ANL and now at LANL, concentrating primarily on instrumentation and accelerator health physics. Prior to that, he worked several years for a NRC Agreement State and an instrument manufacturer. He has a B.S. and M.S. in physics from the University of California system. His e-mail address is

© 2015 by the Health Physics Society