Indoor /sup 222/Rn measurements in the region of Beijing, People's Republic of China
Passive integrating activated C detectors were used to study the regional distribution and temporal variation of /sup 222/Rn in indoor air in dwellings in the Beijing region. Measurements were made in 537 dwellings, which were either detached houses or multi-family apartments. The city-wide study was completed in 1985. The distributions are approximately log-normal with 90% of the dwellings having /sup 222/Rn levels less than 60 Bq m-3. The weighted average /sup 222/Rn concentration has been found to be 22.4 Bq m-3. Averages for detached houses and multi-family dwellings are 25.9 and 15.2 Bq m-3, respectively. Assuming an equilibrium factor of 0.5 and an occupancy factor of 0.8, the average equilibrium equivalent concentration of /sup 222/Rn progeny is 11.2 Bq m-3 and the annual average effective dose equivalent is 1.1 mSv.
- Research Organization:
- Laboratory of Industrial Hygiene, MPH, Deshengmenwai, Beijing, People's Republic of China
- OSTI ID:
- 6078929
- Journal Information:
- Health Phys.; (United States), Vol. 53:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHINA
INDOOR AIR POLLUTION
HOUSES
RADIATION MONITORING
RADON 222
RADIOECOLOGICAL CONCENTRATION
RADIONUCLIDE MIGRATION
AIR POLLUTION
ALPHA DECAY RADIOISOTOPES
ASIA
BUILDINGS
DAYS LIVING RADIOISOTOPES
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
EVEN-EVEN NUCLEI
HEAVY NUCLEI
ISOTOPES
MASS TRANSFER
MONITORING
NUCLEI
POLLUTION
RADIOISOTOPES
RADON ISOTOPES
RESIDENTIAL BUILDINGS
500300* - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)