ESTIMATION OF RADIOLOGICAL EXPOSURE LEVELS IN A MINING AREA BASED ON U-238, Ra-226, Th-232 and K-40 ACTIVITY MEASUREMENTS: A CASE STUDY FOR BEYLIKOVA-SIVRIHISAR COMPLEX ORE SITE IN TURKEY


Yücel H., Ovuc S., Akkaya G., Cakmak S.

RADIATION PROTECTION DOSIMETRY, vol.190, no.3, pp.297-306, 2020 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 190 Issue: 3
  • Publication Date: 2020
  • Doi Number: 10.1093/rpd/ncaa104
  • Journal Name: RADIATION PROTECTION DOSIMETRY
  • Journal Indexes: Science Citation Index Expanded, Scopus, Applied Science & Technology Source, Biotechnology Research Abstracts, CAB Abstracts, Chimica, EMBASE, Environment Index, Index Islamicus, INSPEC, MEDLINE, Pollution Abstracts, Veterinary Science Database
  • Page Numbers: pp.297-306

Abstract

The study estimated the radiological exposure levels in a mining area for miners in the Beylikova-Sivrihisar (Turkey) complex ore site containing U-238, Ra-226 and Th-232. Sixty samples were collected from the study area based on a geologic map. The radionuclide activities were measured using a 78.5% efficient n-type HPGe detector. The measured mean activities were 1871 +/- 38 Bq kg(-1) for U-238, 1749 +/- 5 Bq kg(-1) for Ra-226, 3467 +/- 9 Bq kg(-1) for Th-232 and 309 +/- 2 Bq kg(-1) for K-40. From the measured results, the external effective dose was calculated to be max. 3.80 +/- 0.03 mSv y(-1) (mean: 2.04 +/- 0.03 mSv y(-1)) for inside gallery and max. 7.59 +/- 0.05 mSv y(-1) (mean: 4.08 +/- 0.05 mSv y(-1)) for outdoor. Additionally, the external exposure index was calculated to be H-ex = 33.5 +/- 0.2(mean: 18.2 +/- 0.3) and internal exposure index to be H-in = 45.9 +/- 0.3 (mean: 22.9 +/- 0.4). The results indicate that additional radiation protection measures should be taken during the mining process if an opencast mining is implemented in Beylikova complex ore deposit.