A practical E-PERM (electret passive environmental radon monitor) system for indoor sup 222 Rn measurement

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Health Physics; (USA)

DOI:https://doi.org/10.1097/00004032-199004000-00008· OSTI ID:6943878

Kotrappa, P; Dempsey, J C; Ramsey, R W; Stieff, L R ^[1]

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1. Rad Elec Inc., Frederick, MD (USA)

The technical and scientific basis for the measurement of indoor {sup 222}Rn concentration using an E-PERM (Electret passive environmental radon monitor) has been described in our earlier work. The purpose of this paper is to describe further development of a practical and convenient system that can be used routinely for indoor {sup 222}Rn measurement. The ion chamber is now made of electrically conducting plastic to minimize the response from natural gamma radiation. A spring-loaded shutter method is used to cover and uncover the electret from outside the chamber. The electret voltage reader has been modified to improve the accuracy and the ease in operation. The calibration, performance, error analysis, and lower limits of detection for these standardized versions of E-PERMs are also described.

• OSTI ID: 6943878
• Journal Information: Health Physics; (USA), Journal Name: Health Physics; (USA) Vol. 58:4; ISSN 0017-9078; ISSN HLTPA
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
54 ENVIRONMENTAL SCIENCES
540130 -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (1990-)
AIR POLLUTION
ALPHA DECAY RADIOISOTOPES
BUILDINGS
CALIBRATION
DAYS LIVING RADIOISOTOPES
DESIGN
ECOLOGICAL CONCENTRATION
EVEN-EVEN NUCLEI
HEAVY NUCLEI
HOUSES
INDOOR AIR POLLUTION
ISOTOPES
MEASURING INSTRUMENTS
MONITORING
MONITORS
NUCLEI
POLLUTION
RADIATION MONITORING
RADIATION MONITORS
RADIOECOLOGICAL CONCENTRATION
RADIOISOTOPES
RADON 222
RADON ISOTOPES
RESIDENTIAL BUILDINGS