عنوان

Indoor atmospheric radon in Hamadan, Iran :

شماره

TLets554022

عنوان اصلي

Indoor atmospheric radon in Hamadan, Iran :

نام عام مواد

[Thesis]

نام نخستين پديدآور

Jabarivasal, Naghi

عنوان اصلي به قلم نويسنده ديگر

atmospheric radon indoors and around Hamadan city in Iran

نام ساير پديدآوران

Gillmore, Gavin.

نام ناشر، پخش کننده و غيره

University of Bradford

تاریخ نشرو بخش و غیره

2010

جزئيات پايان نامه و نوع درجه آن

Thesis (Ph.D.)

امتياز متن

2010

متن يادداشت

Radon gas may be a major air quality hazard issue inside the home. Radon (222Rn) comes from the natural breakdown of radioactive uranium (238U) via radium (226Ra) in soil, rocks, and water. Radon and its progeny contribute more than 50% of the total radiation dose to the human population due to inhalation; it can result in severe and fatal lung disease. This investigation has determined the radon concentrations in seventy-seven domestic houses in a mountainous area of Hamadan in Iran which were monitored using track-etch detectors of type CR-39 exposed for three month periods. The arithmetic mean radon concentration in Hamadan buildings was determined to be 80 Bqm-3 and also an average indoor annual effective dose equivalent for the Hamadan city population was calculated as 1.5 mSv. Maximum radon concentrations were noted during the winter and spring season. In addition to this, 28 water wells were monitored by utilizing a Sarad Doseman detector at hourly intervals over extended periods. Radon measurements were also carried out in the nearby Alisadr show cave, using Solid State Nuclear Track etch Detectors (SSNTDs) during the winter and the spring periods. In the cave, the average annual effective geometric and arithmetic mean dose for guides was 28.1 and 34.2 mSv respectively. The dose received by visitors was very low. Hamadan city is built on alluvial fan deposits which are the source of the local water supply. The data from the wells shows that the groundwater in these alluvial deposits influences the flux of radon. The atmospheric radon concentration measurement in wells above the water surface ranged from 1,000 Bqm-3 to 36,600 Bqm-3. There is evidence that radon-rich ground waters play a significant role in the transport of radon through the alluvial fan system. There is evidence that the radon concentrations in homes in Hamadan are greatly influenced by the porous nature of the underlying geology and the movement of groundwater within the alluvial fan.

موضوع مستند نشده

Radon gas ; Environmental hazard ; Hamadan, Iran ; Air quality ; Atmospheric radon ; Indoor radon gas ; Radon gas, side effects ; Lung disease ; Geology ; Ground water

مستند نام اشخاص تاييد نشده

Jabarivasal, Naghi

مستند نام اشخاص تاييد نشده

Gillmore, Gavin.

مستند نام تنالگان تاييد نشده

University of Bradford

نام الکترونيکي

فرمت انتشار

p

نوع ماده

[Thesis]

کد کاربرگه

276903

سطح دسترسي

a

تكميل شده

Y