Radon Levels in Dwellings of New Mirpur Azad Kashmir,Sub-Himalayas,Pakistan

Abstract

Radon concentrations were measured in kucha, semi-kucha and pucka houses located on the sedimentary rocks of Early Pleistocene-Pliocene Soan Formation, Pleistocene Mirpur conglomerate and recent deposits. The radon concentration was measured using CN 85 nuclear tracks etch detectors in box type dosimeters installed in the bedrooms and kitchens of the houses. It was found to vary from 14 ± 7 Bqm^-3 to 258 ± 28 Bqm^-3 with an average of 105 ± 17 Bqm^-3. The average radon concentration in the kucha, semi-kucha and pucka houses was 78 ± 15 Bqm^-3, 108 ± 18 Bqm^-3 and 108± 18 Bqm^-3 respectively. The increase in radon concentration from kucha to pucka houses was attributed to the type of house, differing humidity related to the Mangla Dam, temperature, bed rock geology, structures (joints, fractures and faults), aggregates and uranium-bearing sand. This study shows that the average radon level is within the accepted safe health limit (200 Bqm^-3) for the inhabitants of New Mirpur Azad Kashmir, Pakistan.

Keywords

Isotope geology Radon SSNTD New Mirpur Azad Kashmir Himalayas Pakistan

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References

Vaupotic J. , Krizman M. , Planinic J. , Pezdic J. , Adamic K. , Stegnar P. , Kobal. I. : Systematic indoor radon and gamma measurements in kindergartens and play schools in Slovenia: Health Physics 1994;66(5):550-556.

Fleischer RL , Price PB , Walker RM : Nuclear Tracks in Solids: Principles and Applications, University of California Press, Berklay, 1975.

Iqbal Arshid , Baig MS , Akram M. , Bashir A. , Qureshi AA : Measurement of radon concentration in dwellings of Muzaffarabad city Azad Kashmir, northwest Himalayas, Pakistan: Euro Jour Sci Res 2007;17:373-378.

Tufail M. , Khan MA , Ahmed N. , Khan HA , Zafar NS : Measurements of radon concentration in some cities of Pakistan: Radiat Prot Dosim 1992;40(1):39-44.

Majvorn B. : Measurements of radon in dwellings with CR-39 track detectors: Nuclear Tracks 1986;12:763-766.

Iqbal Arshid , Baig MS , Akram M. , Rahim S. , Qureshi AA : Measurement of radon concentration using SSNTD in dwellings of Rawalakot area, Azad Jammu and Kashmir, sub-Himalayas, Pakistan: Euro Jour Sci Res 2007;17:392-398.

International Commission on Radiological Protection (ICRP) : Protection Against Radon at Home and at Work, ICRP publication 65, Annals of the ICRP 23(2), Oxford, Pergamon Press, 1993.

Unscear : United Nation Scientific Committee on the effects of Atomic Radiation, United Nations, New York, 1993.

Baig MS , Lawrence RD : Precambrian to early Paleozoic orogenesis in the Himalaya: Kashmir Jour Geol 1987;5:1-22.

10.

Baig MS : Geochronology of pre-Himalayan and Himalayan tectonic events, northwest Himalaya , Pakistan: Kashmir Jour Geol 1991;8&9:197.

11.

Wadia DN : The syntaxis of the northwest Himalaya: its rocks, tectonics and orogeny: Mem Geol Surv, Indian Records 1931;65: 185-370.

12.

Wadia DN : The geology of poonch state (Kashmir) and adjacent portions of the Punjab : Mem Geol Surv, Indian Records 1928;11.

13.

Arif M. , Hussain SH , Khan R. , Hussain A. : Geological map of the Mirpur and Bhimber Districts, AJK and parts of the Gujarat and Jhelum Districts Punjab Pakistan: Geological Survey Pakistan, Map Series 2000;6:29.

14.

Akhtar M. , Bajwa MS , Hussain A. : Geological map of the Mangla area, Mirpur District AJK and parts of the Jhelum and Rawalpindi Districts, Punjab, Pakistan: Geological Survey Pakistan, Map Series 2000;6:28.

15.

Tufail M. , Ahmad N. : Measurement of radon in some cities of Pakistan and assessment of excess lung cancer risk: Nucl Sci Jour 1992; 29(4):263-272.

16.

Akram M. , Khattak NU , Iqbal Arshid , Qureshi AA , Ullah K. , Qureshi IE : Measurement of radon concentration in dwellings of Sakardu city, Pakistan: Radiation Measurements 2005;40:695-698.

17.

Ramola RC , Negi MS , Choubey VM : Measurement of equilibrium factor ``F'' between radon and its progeny and thoron and its progeny in the in door atmosphere using nuclear track detectors : Indoor Built Environ 2002;12:351-355.

18.

Ramola RC , Negi MS , Choubey VM : Radon and thoron monitoring in the environment of Kumaun Himalayas, survey and outcomes: Jour Environ Radio 2005;79:85-92.

19.

Choubey VM , Bartarya SK , Negi MS , Ramola RC : Measurement of radon and thoron concentrations in the in door atmosphere and drinking water of eastern Doon Valley, Indian: Indoor Built Environ 2003;12:191-196.