【摘要】 本文报道了黑龙江省环境天然贯穿辐射水平调查的方法和结果。全省一般以２５ｋｍ×２５ｋｍ网格布点，在交通不便、人口稍少的地区以５０ｋｍ×５０ｋｍ网格布点，考虑城镇人口密集和不同土壤类型等，适当加密布点。共布设测点７７６个，其中网格点２２１个，加密点５５５个。调查结果表明：（１）黑龙江省原野γ辐射剂量率按面积、人口和网格点加权均值分别为５３．５、５８．５和５４．２ｎＧｙ·ｈ￣（－１）；（２）道路γ辐射剂量率按网格点加权平均值为５８．４ｎＧｙ·ｈ￣（－１）；（３）室内γ辐射剂量率按人口和按网格加权平均值分别为８５．２和７８．９ｎＧｙ·ｈ￣（－１）；（４）宇宙射线电离成份（不包括中子）所致空气吸收剂量率按网格点和人口加权均值，室内分别为２８．６和２８．１ｎＧｙ·ｈ￣（－１），室外分别为３２．４和３２．２ｎＧｙ·ｈ￣（－１）；（５）天然贯穿辐射（不包括中子）剂量率，按网格点和人口加权均值，室内分别为１０９．７和１１２．８ｎＧｙ·ｈ￣（－１），室外分别为８４．８和９１．０ｎＧｙ·ｈ￣（－１）；（６）宇宙射线、天然γ辐射和天然贯穿辐射所致居民人均年有效剂量当量分别为０．２６、０．４８和０．７３ｍＳｖ，所致全省居民集体年有效?更多还原

【Abstract】 The methods and results of the investigation on natural penetrating radiation levelin Heilongjiang Province are presented. 221 25 km×25km-grid measuring points were set u-niformly up all over the province,with 555 densely measuring points of different types added.The results show that :(1)The area-weighted ,population-weighted and point-weighted aver-age value of natural γ radiation dose rate for field is 53.5,58. 5 and 54. 2 nGy·h￣(-1),respec-tively;(2)The point-weighted average value of natural γ radiaton dose rate for road is 58.4nGy·h￣(-1);(3)The population-weighted and point-weighted average value of natural γ radia-ton dose rate inside buildings is 85. 2 and 78. 9 nGy·h￣(-1),respectively;(4)The point-weightedand population-weighted average value of the dose rate inside buildings from cosmic ray is28. 6 and 28. 1 nGy·h￣(-1),and outside buildings is 32. 4 and 32. 2 nGy·h￣(-1),respectively;(5)The point-weighted and population-weighted average value of natural penetrating radiationdose rate inside buildings is 109. 7 and 112. 8 nGy·h￣(-1),outside buildings is 84. 8 and 91.0nGy·h￣(-1), respectively;(6)The annual effective dose equivalent from cosmic ray, natural γradiation and natural penetrating radiation is 0. 26,0. 48 and 0. 73 mSv, respectively; andcorrespondingly, the annual collective effective dose equivalent is 0.8 × 10￣4,1.6 × 10￣4 and2. 4× 10￣4 man·Sv, respectively.更多还原