目的　研究在核设施放射性流出物外照射条件下定向剂量当量Ｈ′（１０） 能否作为基本限值量有效剂量当量ＨＥ 和有效剂量Ｅ 的估计量。方法　用计算的方法确定流出物外照射的Ｈ′（１０），ＨＥ 和Ｅ；采用ＡＤＡＭ 和ＥＶＡ两种拟人模型，考虑了男性１８ 种和女性２０ 种器官或组织。结果给出了空气浸没、水中浸没和地表沉积物３ 种照射方式下１８４ 种核素的Ｈ′（１０） 、人体器官剂量当量、ＨＥ 和Ｅ，分析了Ｈ′（１０） 与ＨＥ 和Ｅ之间的关系。结论　在核设施流出物外照射条件下，定向剂量当量可作为辐射防护基本限值量偏安全的估计量。 Objective To study whether directional dose equivalent H ’(10) can be used as the basic limit value  effective dose equivalent HE and effective dose E under the condition of radioactive efflux of nuclear facilities. Methods The efflux of H ’(10), HE and E were determined by computational methods. Two types of anthropomorphic models, ADAM and EVA, were considered, including 18 male and 20 female organs or tissues. Results H ’(10), dose equivalent of human organs, HE and E of 184 species of radionuclide, water immersion and surface sediment were obtained. The correlation between H’ (10) and HE and E Relationship between. Conclusions Directed dose equivalence can be used as a safe estimate of the basic limits of radiation protection under out-of-reactor exposure to nuclear facilities.