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[目的 ]分析福建省建材中天然放射性水平 ,并探讨建材辐射水平与人体的外照射有效剂量关系。 [方法 ]采集全省建材 2 6类2 75个样品 ,按规定方法分析测定样品中天然放射性核素含量。 [结果 ] 1建材原料中各种核素均值 2 2 6 Ra为 (79.0± 87.3) Bq· kg- 1 ,2 32 Th为 (40 .2± 38.3) Bq· kg- 1 ,4 0 K为 (383.2± 371 .6) Bq· kg- 1 ,Ra当量浓度均值为 (1 61 .4± 1 32 .8) Bq· kg- 1 ,空气吸收剂量率均值为(1 7.9± 1 3.7)· 1 0 - 8Gyh- 1 ,建材原料对人体的外照射有效剂量均值为 (52 0 .6± 41 9.7)μSv/ a。 2成品建材中 2 2 6 Ra含量为 (69.1± 37.7)Bq· kg- 1 ,2 32 Th为 (96.6± 66.7) Bq· kg- 1 ,4 0 K为 (459.3± 41 7.8) Bq· kg- 1 ,Ra当量浓度为 (2 1 3.7± 1 0 9.5) Bq· kg- 1 ,空气吸收剂量率为 (2 3.4± 1 0 .9)· 1 0 - 8Gyh- 1 ,成品建材对人体的外照射有效剂量为 (683.9± 350 .8)μSv/ a。 3装璜材料中 2 2 6 Ra含量为 (63.0± 2 8.1 )Bq· kg- 1 ,2 32 Th为 (44.9± 46.0 ) Bq· kg- 1 ,4 0 K为 (479.9± 355.2 ) Bq· kg- 1 ,Ra当量浓度为 (51 4 .6± 359.3) Bq· kg- 1 ,空气吸收剂量率为 (2 0 .5± 1 5.2 )· 1 0 - 8Gyh- 1 ,装璜材料对人体的外照射有效剂量为 (51 4 .6?
[Objective] To analyze the natural radioactivity level of building materials in Fujian Province and to explore the relationship between the radiation level of building materials and the external radiation dose of human body. [Method] A total of 2 75 75 samples of building materials of the province were collected and the content of natural radionuclides in samples was analyzed and determined according to the prescribed method. [Results] 1 The mean value of various radionuclides in building materials was (79.0 ± 87.3) Bq · kg -1, 2 32 Th was (40.2 ± 38.3) Bq · kg -1, 4 0 K was ( 383.2 ± 371.6) Bq · kg-1, the average value of Ra equivalent concentration was (1 61.4 ± 1.232) Bq · kg-1 and the mean value of air dose rate was (1 7.9 ± 1 3.7) - 8Gyh- 1, the average effective dose of raw materials for building materials on the human body is (52 0 6 ± 41 9.7) μSv / a. The content of 2 2 6 Ra in the finished building materials was (69.1 ± 37.7) Bq · kg -1, 2 32 Th was (96.6 ± 66.7) Bq · kg -1, and K 0 was 459.3 ± 41 7.8 Bq · kg -1. 1, the equivalent concentration of Ra was (2 1 3.7 ± 1 0 9.5) Bq · kg-1 and the absorbed dose rate of air was (2 3.4 ± 1.09) · 1 0-8Gyh- The effective dose is (683.9 ± 350.8) μSv / a. (2) The content of 2 2 6 Ra in the decoration materials is (63.0 ± 2 8.1) Bq · kg -1, the value of 32 32 Th is (44.9 ± 46.0) Bq · kg -1, and the value of 47 K is (479.9 ± 355.2) Bq · kg - 1, Ra equivalent concentration of (51 4 .6 ± 359.3) Bq · kg-1, air absorption dose rate of (20.5 ± 1 5.2) · 1 0-8Gyh- 1, decoration materials on the human body outside Irradiation effective dose (51 4 .6?