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Title: Radon and climatic multiparameter analysis: A one-year study on radon dynamics in a house

Radon-reduction in private and public buildings is a current issue. Research has opened our eyes for the enormous fluctuations of the indoor radon level over longer observation periods. For generalizing the behavior radon in a building, care must be taken that the observation period is long enough, to mediate the pronounced climatic changes in the course of a year. The author has started a one-year observations, precisely logging up the radon level in a single family home. Six portable multiparameter-monitors, each equipped with a 0.6 liter PIC-detector (PIC = pulse ionization chamber), have been installed at different locations within the building and outdoors (incl. two soil-gas probes). Besides the radon concentration, in the same instruments the following parameters are logged cotinuously: relative humidity, differential pressure between basement and sub-slab area, soil impendance (indication water saturation) and wind speed on the roof. In the basement, the radon concentration varies between 61 Bq/m{sup 3} and 5408 Bq/m{sup 3} (mean: 1092 Bq/m{sup 3}.) By analyzing these records, the time sequence of the radon concentration can be characterized as a {open_quotes}mixture{close_quotes} of (periodic) circadian variations overlayed with (aperiodic) seasonal fluctuations. In this building, it turns out, that the pressure difference across the base platemore » is an important factor for radon entry as well as ventilation rate. It can be shown, that the pressure is closely related to the indoor-outdoor temperature difference. This relation was found to be non-linear. Other factors are attributed to the activities of the inhabitants. The paper points out correlations between radon and different climatic parameters mainly by using scatterplots and classical regression methods.« less
Authors:
 [1]
  1. Genitron Instruments, Frankfurt (Germany)
Publication Date:
OSTI Identifier:
269811
Report Number(s):
CONF-950999--
TRN: 96:004072-0019
Resource Type:
Conference
Resource Relation:
Conference: International radon symposium: the radon industry - the next 10 years, Nashville, TN (United States), 27-29 Sep 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 International radon symposium. AARST today: Professionals ready for tomorrow; PB: 408 p.
Publisher:
American Association of Radon Scientists and Technologists, Cottonwood, AZ (United States)
Country of Publication:
United States
Language:
English
Subject:
56 BIOLOGY AND MEDICINE, APPLIED STUDIES; RADON 222; CORRELATIONS; HOUSES; RADIATION MONITORING; WEATHER; FLUCTUATIONS; HUMIDITY; QUALITY ASSURANCE; WIND; VENTILATION; BASEMENTS; SEASONAL VARIATIONS; SCATTERPLOTS; PRESSURE DEPENDENCE