西安某热电厂粉煤灰的天然放射性水平测量

MEASUREMENT OF NATURAL RADIOACTIVITY LEVEL OF FLY ASH FROM CERTAIN THERMOELECTRICITY PLANT

为了解西安某热电厂粉煤灰中天然放射性核素水平及其应用情况,对其粉煤灰场堆采集了5个样品,利用低本底反康普顿HPGeγ谱仪测量了样品中天然放射性核素含量。结果显示样品中238U、226Ra、232Th和40K核素的平均比活度分别为67.6Bq.kg-1、79.5Bq.kg-1、72.7Bq.kg-1和190Bq.kg-1。依据中华人民共和国国家标准GB6566-2001,对其进行了比较分类,结果表明,样品中天然放射性核素水平均处于正常本底,属于A类建筑材料,应用范围不受限制。

In order to have a comprehensive understanding of radioactivity level of fly ash and its application in a thermoelectricity group in Xi＇an, five samples were collected from fly ash stack of the group. Natural radionuclide contents in samples were measured by a low background anti-Compton HPGe Gamma spectrometer. The contents of 238^U,226^Ra,232^Th,40^K were 67.6 Bq/kg,79.5 Bq/kg,72.7 Bq/kg, 190 Bq/kg,respectively. According to national standard GB 6566-2001, the result indicates the radioactivity level of all samples is at the normal background level and the fly ash can be used as Category A building materials. The future application of the fly ash in the thermoelectricity group was also analyzed.