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  • Title: Indoor radon measurements in the dwellings of Punjab and Himachal Pradesh, India.
    Author: Rani A, Singh S, Duggal V.
    Journal: Radiat Prot Dosimetry; 2013; 156(1):118-24. PubMed ID: 23509400.
    Abstract:
    The measurement of indoor radon concentrations were performed in the dwellings of the Punjab and Himachal Pradesh, India by using LR-115 type II Solid-State Nuclear Track Detectors in the bare mode. The annual average indoor radon concentrations in the dwellings are found to vary from 114 to 400 Bq m(-3) with an average of 194 Bq m(-3). In ∼22 % of the dwellings the indoor radon activity concentration values lies in the range of action level (200-300 Bq m(-3)) and in ∼11 % of the dwellings above the upper limit of action level recommended by the International Commission on Radiological Protection (ICRP). The annual effective dose (AED) varies from 2.88 to 10.08 mSv with an average of 4.88 mSv. In most of the villages, the AED lies in the range of action level (3-10 mSv) recommended by the ICRP. The seasonal variation in indoor radon reveals the maximum values in winter and minimum in summer. The winter/summer ratio of indoor radon ranges from 1.15 to 1.62 with an average of 1.31. Analysis of ventilation conditions reveal that the indoor radon concentration values are more in poorly ventilated dwellings compared with the well-ventilated ones.
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