No abstract

ÖzetBu çalışmada, Çorum ili bünyesinde faaliyet gösteren ve özel şirket tarafından işletilen 2 farklı ilçede ve 3 farklı yeraltı kömür ocağında radon yoğunluk ölçümleri yapılmıştır. Her bir madene 25 ile 30 arasında CR-39 radon detektörü madenlerin her bir farklı noktasına yerleştirilmiştir. Yerleştirilen bu detektörlerin ortalama 45 gün ile 60 gün arasında işleme tabi tutulmuştur. Belirlenen gün sonunda toplanan detektörler hava ile teması iyice kesilmesi için alüminyum folyo ile sarılarak izole edilmişlerdir. İzole edilen detektörler Çekmece Nükleer Araştırma Merkezinde (ÇNAEM) deneysel işlemlerden geçirilmiş ve Bq/m3 cinsinden radon yoğunlukları elde edilmiştir. Elde edilen radon yoğunlukları, Türkiye Atom Enerjisi Kurumu (TAEK) kurumu tarafından yeraltı maden ocakları için belirlenen 1000 Bq/m3etkin değerinin altındadır. Diğer taraftan, ölçülen bazı değerler Uluslararası Radyasyondan Korunma Komitesi (ICRP) tarafından yeraltı maden ocakları için tavsiye edilen 500-1500 Bq/m3 etkin değer aralığı içinde kalmaktadır. Anahtar Sözcükler: Radon, CR-39 dedektörleri, Kömür ocakları, Çorum AbstractIn this study, the radon concentration measurements of three different underground coal mines that are run by a private company in two different towns of Çorum were carried out. About 25-30 pairs of CR-39 etch track detectors were placed to the different points of coal mines. These detectors were kept at these points for about 45-60 days. In order to prevent these detectors to contact with air, they were covered with foils. These detectors were carried to Çekmece Nuclear Research & Training Center (ÇNRTC) and proceed for experimental process and lastly radon concentrations were obtained as Bq/m3. The measured values of radon concentrations are under the action level 1000 Bq/m3 for underground coal mines recommended by Turkish Atomic Energy Agency (TAEA). On the other hand, some of the measured values are in the range of the action levels 500-1500 Bq/m3 recommended by International Commission of Radiation Protection (ICRP) for underground coal mines.

Indoor radon and soil radioactivity levels were determined for Erzincan province in Turkey. Indoor radon concentrations were determined in 89 dwellings using CR-39 passive Solid State Nuclear Track Detectors (SSNTDs) for four seasons. The mean annual 222 Rn activity concentration was found to be 119 Bq.m À3 . In the winter season, indoor radon concentrations showed the highest values while the lowest values were observed in the summer season. A model was used to predict the number of lung cancer incidences due to inhalation of radon. The findings have indicated that radon is responsible for 13% of lung cancer incidences occurring in the Erzincan province. Since indoor radon concentration correlates with 226 Ra content in soil beneath the dwellings, soil samples were collected near the houses where indoor radon measurements were performed in order to seek a correlation. The 226 Ra, 232 Th, 40 K and 137 Cs activity concentration values were 52, 26, 649 and 9 Bq.kg À1 , respectively. The annual effective dose due to naturally occurring radionuclides was around 82 mSv.y À1 which is higher than the world average value of 70 mSv.y À1 . The results of the present study are expected to be a useful baseline data for future studies.and polonium-214. These short-lived decay products are also radioactive and alpha emitters, and may attach to aerosol particles in the atmosphere, thus forming ''attached'' decay products. Decay products which do not attach to aerosols are in the ''unattached'' state.