MEASUREMENT OF AMBIENT GAMMA DOSE RATES ALONG TWO INDUSTRIAL FACILITIES IN LEYTE ISLAND, PHILIPPINES. Issue 3 (26th April 2019)

• Record Type: Journal Article
• Authors: Palad, Lorna Jean; Mendoza, Christopher; Dela Cruz, Fe; Olivares, Juanario; Cruz, Paolo Tristan; Iwaoka, Kazuki
• Is Part Of: Radiation protection dosimetry. Volume 184:Issue 3/4(2019)
• Page Start: 351
• Page End: 354
• Publication Date: 2019-04-26
• Subjects: Radiation dosimetry -- Periodicals; Radiation -- Safety measures -- Periodicals; 363.1799
• DOI: 10.1093/rpd/ncz092
• Languages: English
• ISSNs: 0144-8420

Abstract

Abstract: Natural background radiation to which humans are continuously exposed to come from the primordial radionuclides on the surface of the Earth. Industrial activities which concentrate natural radionuclides usually in residues and waste materials may enhance natural radioactivity on the ground via airborne contamination. In this study, ambient gamma dose rates were measured inside and outside two industrial facilities in Leyte, Philippines, to assess possible contribution of NORM materials in enhancement of natural radiation background in these areas. Ambient gamma dose rates measured at selected sites from Tacloban City to Isabel, Leyte and in nearby areas of Kananga and Ormoc City, Leyte were within the range of the background ambient gamma dose rates measured in the Philippines, ranging from 21 to 124 nSv/h. The workers in the phosphate rock storage and phosphogypsum pond areas in the phosphate fertiliser production plant received the highest annual effective external dose of 0.76 mSv.