摘要
根据苏州某大型燃煤电厂烟尘排放所致周围环境近地面空气中天然放射性核素的浓度和地面沉积量及其分布,估算了该厂气载放射性排出物对厂区周围半径100km范围内公众居民经蔬菜、农作物食入,飘尘吸入和地表γ沉积的内、外照射途径所致的归一化人均有效剂量当量和归一化集体有效剂量当量。估算结果表明,最大污染浓度位于下风向SW-NW区间距烟囱1km处;归一化人均有效剂量当量是4.17×10^(-4)Sv/GWa;对厂区周围半径100km范围内2.1×10~7公众居民的归一化集体有效剂量当量是40man·Sv/GWa。
According to the distribution of concentrations onnatural radionuclides in air near ground and their depositions onground, the dose assessement was given for a coal-fired power plantin Suzliou City.Normalized individual and collective effective doseequivalents within a area with a radius of 100km around the plantwere estimasted through internal and external exposure path due to foodintake,dust inhelation and γ exposure from radionuclides depositing onground.The results showed that the maximun Polluted zone was locateddownwind SW-NW direction and about 1 km far from the plant stack,where mormalized individual effective dose equivalent was 4.17×10^(-4)Sv/GW.,and normalizal collective effective dose equivalens was 40 man.Sv/GWa for 2.7×10~7 persons of the public within 100km radius.
出处
《辐射防护》
CAS
CSCD
北大核心
1990年第3期199-205,198,共8页
Radiation Protection
关键词
电厂
气载
放射性
排出物
环境
Coal-Fired Power Plant
Airborne Radioactivity
Lffluent
Normalized Individual Effective Dose Eqivalent
Normalized Collective Effective Dose Equivalent
