Assessment of the long-term possible radiological risk from the use of ceramic tiles in Malaysia  

作　　者：Shittu Abdullahi Aznan Fazli Ismail Syazwani Mohd Fadzil Supian Samat 

机构地区：[1]Centre for Frontier Science,Faculty of Science and Technology,Universiti Kebangsaan Malaysia (UKM) [2]Department of Physics,Faculty of Science,Gombe State University [3]Nuclear Science Program,Faculty of Science and Technology,Universiti Kebangsaan Malaysia (UKM)

出　　处：《Nuclear Science and Techniques》2019年第2期115-122,共8页核技术（英文）

基　　金：supported by the Universiti Kebangsaan Malaysia(UKM)under Grant Number GGPM-2017-084

摘　　要：This study investigated the level of natural radioactivity and radiological risks of 40 different ceramic tiles through gamma-ray spectroscopy using a high-purity germanium detector. The calculated activity concentrations were evaluated to determine their potential radiological risks to human health. Furthermore, the activity concentrations were subjected to the RESRAD-BUILD computer code to assess the effect of ventilation rate, dweller position, and room size and direction on the total effective dose(TED). The simulated TED received by a receptor when changing the ventilation rate in a room ranged from0.26 ± 0.01 to 0.61 ± 0.01 mSv/y; however,the percentage variations in the TED due to dweller position and room size are 34, 31,and 35% and 33, 27, and 40% for the x-,y-,and z-directions, respectively. The overall TED received by the dweller based on room size and direction is 0.75 mSv/y. The calculated radiological risk parameters were all below the recommended maximum limit. However, the TED received by the dweller is significantly affected by the directions of the measurement, position,room size,and ventilation. Therefore,estimating the TED from one direction would underestimate the total dose received by the dweller.This study investigated the level of natural radioactivity and radiological risks of 40 different ceramic tiles through gamma-ray spectroscopy using a high-purity germanium detector. The calculated activity concentrations were evaluated to determine their potential radiological risks to human health. Furthermore, the activity concentrations were subjected to the RESRAD-BUILD computer code to assess the effect of ventilation rate, dweller position, and room size and direction on the total effective dose(TED). The simulated TED received by a receptor when changing the ventilation rate in a room ranged from0.26 ± 0.01 to 0.61 ± 0.01 mSv/y; however,the percentage variations in the TED due to dweller position and room size are 34, 31,and 35% and 33, 27, and 40% for the x-,y-,and z-directions, respectively. The overall TED received by the dweller based on room size and direction is 0.75 mSv/y. The calculated radiological risk parameters were all below the recommended maximum limit. However, the TED received by the dweller is significantly affected by the directions of the measurement, position,room size,and ventilation. Therefore,estimating the TED from one direction would underestimate the total dose received by the dweller.

关 键 词：RADIOLOGICAL RISK RESRAD-BUILD computer code Ceramic TILE ROOM size Ventilation rate 

分 类 号：TL[核科学技术]