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目的 估算河南“4 2 6”6 0 Co源辐射事故中 6名受照人员的物理剂量。方法 确立各受照人员的受照模式 ;模拟测量辐射场的照射量率分布 ;使用组织等效拟人体模 ,对“梅”(女 )、“旺”(8岁男童 )和“天”的主要受照 ,进行剂量模拟测量 ;对“勇”、“民”、“义”的受照和“天”的部分受照 ,采用组织 空气比的方法估算他们的剂量。结果 给出“梅”和“旺”的 19个主要器官和组织剂量 ,“梅”、“旺”和“天”的全身平均剂量分别为 6 1Gy、3 4Gy和 2 4Gy;造血干细胞活存计权等效剂量分别为 5 0Gy、2 6Gy和 2 3Gy。“勇”、“民”和“义”全身平均剂量分别为 1 1Gy、0 9Gy和 0 7Gy ;造血干细胞存活计权等效剂量分别为 1 0Gy、0 9Gy和 0 8Gy。结论 给出的物理剂量估算结果与用生物学方法估算的剂量结果 ,以及受照者的临床检验和辐射损伤症状程度相一致 ,为临床诊治和剂量与效应的研究提供了可靠的剂量学数据资料。
Objective To estimate the physical dose of 6 irradiated workers in “4 2 6” 6 0Co source radiation accident in Henan Province. Methods To establish the illumination pattern of each irradiated person, to simulate the radiation dose rate distribution of radiation field, and to evaluate the distribution of irradiation quantity of “Mei” (female), “Wang” (8 years old boy) and “Tian” Of the main exposure, the dose simulation measurement; “Yong”, “Min”, “righteousness” and “day” part of the exposure, the use of tissue air ratio method to estimate their dose. The results showed that the main organs and tissue doses of “Mei” and “Wang” were 61 1Gy, 3 4Gy and 2 4Gy respectively. The total body weight of “Mei”, “Wang” and “Tian” The equivalent doses are 50Gy, 26Gy and 2 3Gy, respectively. The mean doses of “Yong”, “Min” and “Yi” were 11Gy, 09Gy and 07Gy, respectively. The calculated equivalent doses of hematopoietic stem cell survival were 10Gy, 0Gy and 0GGy, respectively. Conclusions The results of the physical dose estimates, which are consistent with the dose-result estimates by biological methods, as well as the clinical examination and the degree of symptoms of radiation damage, provide reliable dosimetric data for clinical diagnosis and study of dose and effect .