Journal article
Blind testing of commercially available short-term radon detectors
Health physics (1958), Vol.94(6), pp.548-557
06/01/2008
DOI: 10.1097/01.HP.0000309764.46086.23
PMID: 18469588
Abstract
A sample (if commercially available, charcoal adsorption type, short-term radon detectors was blind tested under controlled laboratory conditions in order to obtain a "snapshot" of the accuracy and precision of the detectors. The results of the controlled exposures were then compared to a previous field study of the same type of commercially available radon detectors. Radon detectors, purchased from seven different commercial vendors, were exposed to a reference Rn-222 gas concentration at the U.S. Environmental Protection Agency's (EPA) Radon Chamber located at the Radiation and Indoor Environments National Laboratory in Las Vegas, Nevada. EPA Test 1 was performed under a controlled simulated field exposure paralleling, to the extent possible, the previous actual field exposure conditions. A second controlled exposure, EPA Test 2, was performed under a relatively steady state of 222Rn gas concentration, at the same temperature, but a more moderate relative humidity. In the previous field setting evaluation of detectors, five out of six companies tested did not pass the accuracy guideline (all individual relative errors <= 25%) established during the EPA's former Radon Measurement Proficiency Program (EPA-RMPP). As compared to the field test, the detectors in this study generally exhibited better accuracy and precision. Not surprisingly, it appeared temporal fluctuations in radon concentrations and increased humidity had a negative influence on the accuracy and precision of detectors for some companies. The inability of three out of seven companies to meet former EPA-RMPP guidelines for accuracy, even under ideal exposure conditions (constant temperature, humidity, and radon concentration), highlights the importance of blind testing commercially available radon detectors. Furthermore, the consistent over-reporting or under-reporting trends in the overall results for all three tests suggest a potentially widespread systematic bias for the individual companies that merits further investigation. It is unknown if this one-time "snapshot" represents the overall reliability of commercially available charcoal-based radon detectors. Nonetheless, the findings suggest the need for improved vigilance to assure that the public can rely on commercially available radon detectors to make an informed decision whether or not to perform additional testing or to mitigate.
Details
- Title: Subtitle
- Blind testing of commercially available short-term radon detectors
- Creators
- Kainan Sun - University of IowaGregory Budd - US EPA, Radiat & Indoor Environm Natl Lab, Las Vegas, NV 89193 USASteven McLemore - Gen Dynam Informat Technol, Henderson, NV 89074 USAR. William Field - Univ Iowa, Coll Publ Hlth, Dept Environm & Occupat Hlth, Dept Epidemiol, Iowa City, IA 52242 USA
- Resource Type
- Journal article
- Publication Details
- Health physics (1958), Vol.94(6), pp.548-557
- DOI
- 10.1097/01.HP.0000309764.46086.23
- PMID
- 18469588
- NLM abbreviation
- Health Phys
- ISSN
- 0017-9078
- eISSN
- 1538-5159
- Publisher
- Lippincott Williams & Wilkins
- Number of pages
- 10
- Grant note
- T42OH008491 / NATIONAL INSTITUTE FOR OCCUPATIONAL SAFETY AND HEALTH; United States Department of Health & Human Services; Centers for Disease Control & Prevention - USA; National Institute for Occupational Safety & Health (NIOSH) P30 ES 05605 / NIEHS NIH HHS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Environmental Health Sciences (NIEHS) R01CA085942 / NATIONAL CANCER INSTITUTE; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI) T42 OH 008491 / NIOSH CDC HHS R01 CA 85942 / NCI NIH HHS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Cancer Institute (NCI) P30ES005605 / NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Environmental Health Sciences (NIEHS)
- Language
- English
- Date published
- 06/01/2008
- Academic Unit
- Occupational and Environmental Health; Epidemiology
- Record Identifier
- 9984363588202771
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