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本文报告了对鞍钢铁西医院核医学楼的放射性本底调查。地表γ照射量率均值为10.29×10~(-8)GY·h~(-1);放射性气溶胶总α、β活度均值放置4h分别为:1.03×10~(-3)Bq·L~(-1)和1.20×10~(-3)Bq·L~(-1),放置4d分别为:4.54×10~(-6)Bq·L~(-1)和3.82×10~(-5)Bq·L~(-1);空气中氡及其子体浓度的均值分别为:23.10Bq·M~(-3)和1.87×10~(-6)J·M~(-3);α、β表面污染范围值分别为(0.68—1.15)×10~(-3)Bq·cm~(-2)和(1.31—2.09)×10~(-1)Bq·cm~(-2);自来水中放射性核素含量均值:u为1.36×10~(-6)g·L~(-1),~(226)Ra为2.70×10~(-3)Bq·L~(-1),Th为3.02×10~(-8)g·L~(-1),总β为0.16Bq·L~(-1)。上述值均处在省内本底值范围内。
This article reports on the radioactive background of the Nuclear Medicine Building at Tiexi Hospital in Ansteel. The mean value of γ radiation dose on the surface was 10.29 × 10 -8 GY · h -1. The mean values of total α and β activities of radioactive aerosols were 1.03 × 10 -3 Bq · L ~ (-1) and 1.20 × 10 ~ (-3) Bq · L ~ (-1) for 4 days and 4.54 × 10 -6 Bq · L -1 and 3.82 × 10 ~ (-1) -5) Bq · L ~ (-1). The average concentrations of radon and its daughter in the air are respectively 23.10Bq · M -3 and 1.87 × 10 -6 J · M -3 ); the range of α, β surface contamination was (0.68-1.15) × 10 -3 Bq · cm -2 and 1.31-2.09 × 10 -1 Bq · cm -1, 2). The average radionuclide content in tap water was 1.36 × 10 -6 g · L -1, 2. 226 × 10 -3 Bq · L -1, 1), Th was 3.02 × 10 -8 g · L -1, total β was 0.16Bq · L -1. The above values are in the province of the background value range.