摘要
就地测量内蒙古某地五间煤渣砖居室墙壁及地板中U系、Th系及40K等天然放射性核素的活度浓度、空气中氡浓度和γ剂量率。五间煤渣砖居室内226Ra、232Th、40K的活度浓度范围分别为101～311、69～125、1 229～2 538 Bq/kg;室内氡浓度范围为66～143 Bq/m3,均值为97 Bq/m3;γ剂量率范围为136～226 nGy/h,均值为172 nGy/h。根据测量值计算所得内外照射指数部分大于国家标准限值,初步认为煤渣砖建材的使用一定程度上增加了居民内外照射负担。
In - situ measure the activity concentration of natural radionuclide including U series, Th series and 40K form the wails and floors, and In - situ measure the radon concentration in the air and the gamma dose rate, in the 5 einderblock rooms somewhere in Inner Mongolia. The range of activity coneentration of 226Ra,232Th,40K are respectively 101 ~ 311,69 ~ 125,1 229 ~ 2 538 Bq/kg; and the range of indoor radon concentration is 65.5 ~ 143.3 Bq/m3 ,the mean value is 96.7 Bq/m3 ;and the range of gamma dose rate is 135.7 ~ 225.6 nGy/h, the mean value is 172.1 nGy/h. Some intemal and extemal exposure calculated according the measured values are greater than the national standard value. Preliminarily concludes that the use of cinder block building materi- als to some extent increase the burden of inside and outside the irradiation on theresidents.
出处
《核电子学与探测技术》
CAS
CSCD
北大核心
2012年第12期1397-1401,共5页
Nuclear Electronics & Detection Technology
关键词
煤渣砖居室
天然核素活度浓度
氡浓度
Γ剂量率
cinderblock room
natural radionuclideactivity concentration
radon concentration
gamma dose rate
