Institutional members access full text with Ovid®

Share this article on:

ESTIMATE OF ANNUAL AVERAGE RADON CONCENTRATION IN THE NORMAL LIVING AREA FROM SHORT-TERM TESTS

Chen, Jing

Papers

Abstract—: Most residential radon guidelines refer to annual average radon concentration in the normal living area. However, decisions on whether a house needs mitigation are usually based on short term radon tests. Depending on where detectors are placed and when tests are performed, results of those measurements can differ significantly from the annual average radon concentration in the normal living area. We provide a practical method based on survey results in 5486 Canadian houses to estimate annual average radon levels from results of screening tests. The average ratio of radon concentration in the basement to that of the upper floors in a house is determined, and the average relative seasonal variations of radon levels in the basement and of the upper floors are identified. Based on these relative quantities, estimate factors are derived for four different combinations of detector location and the living area and tabulated for different calendar periods of radon testing. The annual average radon level can be estimated by multiplying the result of a short-term screening test with the appropriate estimate factor given in this study.

*Radiation Protection Bureau, 6302D1, Health Canada, 775 Brookfield Road, Ottawa K1A 1C1, Canada.

Manuscript received 5 November 2002;

revised manuscript received 28 March 2003, accepted 16 August 2003

For correspondence or reprints contact: the author at the above address, or email at jing_chen@hc-sc.gc.ca.

© 2003 by the Health Physics Society