在飞灰样本中测量出气速和辐射剂量
Anil Sharma1, Pragya Pandit2, Asha Attri3
1Department of Physics, Guru Gobindsingh Indraprastha University, New Delhi-110078, India.
Radiation protection dosimetry
|July 17, 2024
概括
这项研究测量了印度煤炭飞灰中的气和放射性核酸度. 结果显示-226,-232和-40的含量较高,突显了热电厂对环境的潜在担忧.
科学领域:
- 环境科学 环境科学
- 核物理 核物理 核物理
- 地质化学 地质化学
背景情况:
- 燃煤发电厂是印度的主要能源,利用高灰度的煤.
- 飞是一种副产品,由于其天然存在的放射性物质 (NORM) 含量,具有重要的环境利益.
- 了解飞灰的放射性影响对于环境和公共卫生评估至关重要.
研究的目的:
- 从飞灰样本中量化气出口率.
- 为了确定飞灰中关键放射性核化物 (226Ra,232Th,40K) 的活性度.
- 评估从印度热电厂处置飞的潜在放射性影响.
主要方法:
- 使用"密封技术"用LR-115 II型探测器测量拉登呼气速率.
- 放射性核酸活性度 (226Ra,232Th,40K) 通过使用低水平的NaI (Tl) 基马射线光谱仪来确定.
- 样本来源于印度北方邦的卡西姆普尔热电厂.
主要成果:
- 的呼气速率从57.1 ± 5.3到119.4 ± 7.7 mBq m−2 h−1不等,平均为87.3 ± 5.8 mBq m−2 h−1.
- 226Ra的活性度从20.0 ± 8.5到30.0 ± 9.7 Bq kg-1不等,平均为23.4 ± 9.0 Bq kg-1.
- 232Th的活性度平均为46.5 ± 12.1 Bq kg-1 (范围:17.0 ± 9.9至69.0 ± 13.8 Bq kg-1),40K的活性度平均为177.0 ± 8.1 Bq kg-1 (范围:130.0 ± 7.2至332.0 ± 11.1 Bq kg-1).
结论:
- 这项研究量化了印度煤炭飞灰中的气和放射性核素含量.
- 测量的放射性核素度表明,与飞灰相关的潜在放射性问题.
- 调查结果强调需要谨慎管理和处理飞的战略,以减轻环境风险.
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