中国燃煤火电煤灰渣在主体墙材中利用所致居民剂量估算

Abstract

Abstract: Additional radiation dose to inhabitants living in buildings constructed with wall material containing coal ash were evaluated through the investigations on electricity generation of coal-fired power plants (CFPs), activity concentration of natural γ nuclides in coal ash, comprehensive utilization of coal ash in wall materials in China and the indoor radiation exposure scenarios during 1992—2010. The results showed that: the radiation dose for inhabitants living in these buildings increased with the addition of coal ash in main wall material, which was consistent with the reported data. In China, the total additional annual effective individual dose from wall material containing coal ash was 0.01-0.30 mSv/a higher than that from red bricks, with an average of 0.22 mSv/a; and the internal dose approached to 82%. The additional normalized collective dose during 1992—2010 was approximately (1.92×10³)-(5.85×10³) man·Sv/GWa. It was also found that the average contribution to the increase of indoor radon concentration from use of main wall material containing coal ash approached to 28%, with a range of 7%-38%. The results obtained in this study provided essential basic data for the utilization policy of coal ash and environmental radiological risk analysis for CFPs.

Key words: coal-fired power plant, coal ash, wall material, inhabitant, dose

CLC Number:

X822.7

SONG Weijie, CHEN Ling, PAN Ziqiang, GUO Jinsen, LIU Zhe. Assessment of radiation dose to inhabitants from coal ashin main wall material in China[J].RADIATION PROTECTION, 2018, 38(4): 300-307.

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Assessment of radiation dose to inhabitants from coal ashin main wall material in China

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