The average air γ-ray dose rates measured from the field, road, bone coal, bone coal cinder and bone coal cinder bricks in the three bone coal mines in west Zhejiang Province, are 3.8× 102, 4.1× 102, 7.1 &#...The average air γ-ray dose rates measured from the field, road, bone coal, bone coal cinder and bone coal cinder bricks in the three bone coal mines in west Zhejiang Province, are 3.8× 102, 4.1× 102, 7.1 × 102, 4.0 × 102 and 7.1 × 102 nGy/h, respectively. The mean contents of 238U, 226Ra, 232Th and 40K in the bone coal of the three bone coal mines are 2.0× 103, 2.1 × 103, 3.9 × 101 and 6.1 × 102 Bq/kg, respectively, in the bone coal cinder(BCC) are 1.6× 103, 1.6× 103, 2.3× 101 and 4.5× 102 Bq/kg, respectively, and in the bone coal cinder brick(BCCB) are 1.2× 103, l.2× 103, 2.4× 101 and 4.0× 102 Bq/kg, respectively, and those in the reference soil are 3.4× 10’, l.0× 102, 4.9 × 101 and 4.9 × 102 Bq/kg, respectively. The annual mean of effective dose equivalent for public living in house buildings made with BCCB near the three mines is 6.8 mSv.展开更多
文摘The average air γ-ray dose rates measured from the field, road, bone coal, bone coal cinder and bone coal cinder bricks in the three bone coal mines in west Zhejiang Province, are 3.8× 102, 4.1× 102, 7.1 × 102, 4.0 × 102 and 7.1 × 102 nGy/h, respectively. The mean contents of 238U, 226Ra, 232Th and 40K in the bone coal of the three bone coal mines are 2.0× 103, 2.1 × 103, 3.9 × 101 and 6.1 × 102 Bq/kg, respectively, in the bone coal cinder(BCC) are 1.6× 103, 1.6× 103, 2.3× 101 and 4.5× 102 Bq/kg, respectively, and in the bone coal cinder brick(BCCB) are 1.2× 103, l.2× 103, 2.4× 101 and 4.0× 102 Bq/kg, respectively, and those in the reference soil are 3.4× 10’, l.0× 102, 4.9 × 101 and 4.9 × 102 Bq/kg, respectively. The annual mean of effective dose equivalent for public living in house buildings made with BCCB near the three mines is 6.8 mSv.
