A practical E-PERM (electret passive environmental radon monitor) system for indoor sup 222 Rn measurement
- 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), Vol. 58:4; ISSN 0017-9078
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
RADIATION MONITORS
DESIGN
RADON 222
RADIATION MONITORING
CALIBRATION
HOUSES
INDOOR AIR POLLUTION
RADIOECOLOGICAL CONCENTRATION
AIR POLLUTION
ALPHA DECAY RADIOISOTOPES
BUILDINGS
DAYS LIVING RADIOISOTOPES
ECOLOGICAL CONCENTRATION
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
MEASURING INSTRUMENTS
MONITORING
MONITORS
NUCLEI
POLLUTION
RADIOISOTOPES
RADON ISOTOPES
RESIDENTIAL BUILDINGS
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments
540130 - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (1990-)