Radioactivity level of the ambient environment of Anren bone—coal power station

The radioactivity level of the ambient environment of Anren Bone-coal Power Station(BCPS) was investigated systematically.The γ radiation dose rate level in the environment ,the content of ^238U and ^226Ra in the ambient soil and the farmland in the direction of downwind,the concentrations of ^238U,^232Th,^226Ra,^40K and ^222Rn,as well as α potential energy in air,and the concentrations of natural U and Th in effluent are all higher than the corresponding values of the reference site.The additional annual effective dose equivalent to the residents living in the houses made of bone-coal cinder brick is 2.7mSv.     

The collective dose equivalent in evaluated region of bone-coal power stations and bone-coal shafts

1 Introduction The reserve of bone-coal in Hubei, Hunan, Ji-angxi, Zhejiang and Anhui Provinces accounts for about 90% of total reserve in China. More than two hundred years ago, local people spontaneously started to mine the bone-coal on a small scale. At present, the bone-coal is not only used to make lime and then the lime used as a building material or to improve the soil, but also used as a kind of fuel for generating electric-ity. However, the chimney’ exhaust of the bone-coal power …     

Investigation of environmental activity levels of bone-coal mining area in five provinces

During 1991-1993, the activity levels of the bone-coal mines were investigated in Zhejiang, Hubei. Hunan,Jiangxi and Anhui Province, respectively, where the reserve of bone-coal is about 90% of our country‘s total reserve.The average ofγ radiation doserate level measured for bone-coal, bone-coal cinder (BCC) and bone-coal cinder brick (BCCB) in these provinces is about 500 nGy/h, 400 nGy/h and 700 nGy/h respectively, while that for fields, roads and houses made of BCCB in corresponding regions of these provinces is about 200 nGy/h, 260 nGy/h and 300 nGy/h respectively. It is shown that the environmental activity level of bone-coal mining area is about 3 times higher than the reference spots.     

Investigation on natural radionucildes levels in multiple media in bone-coal mine areas of five provinces

This paper reports methods and results of the investigation of natural radionuclides levels in multiple media in the bone-coal mine areas in Hubei, Hunan, Jiangxi, Zhejiang, and Anhui Provinces. In the studied bone-coal mine areas, the specific activities of ^238U and ^226Ra in the soil samples were 0.37 and 0.24 Bq/g, respectively; the specific activities of ^226Ra in the samples of bone-coal, bone-coal cinder and bone-coal cinder brick （BCCB） were 1.3, 1.4 and 0.9 Bq/g, respectively. In the water samples collected fiom the bone-coal mine areas, the average concentrations of natural uranium and ^226Ra were 33μg/L and 58 mBq/L, respectively, while in the water samples collected from outside the bone-coal mine areas, they were 3.4μg/L and 45 mBq/L, respectively. In addition, the specific activities of ^238U and ^226Ra in air aerosol samples from the bone-coal mine areas were 0.6 and 0.5 mBq/m^3, respectively.     

加拿大核电站辐射环境影响管理方法探讨

对于核电站辐射环境监测,我国实行双轨制,而加拿大则全部由核电站承担,政府部门负责对监测方案的审批和监测工作的检查验收,其各有优缺点。通过对加拿大辐射环境影响管理方法的探讨,有助于克服我国重复测量的缺点,建立起一套地方政府与核电站协调一致的管理方法。     

Estimation of the resident''s additional dose in bone-coal mining areas of the five provinces

This paper introduces the resident's additional dose in bone-coal mining areas. The increase of the annual additional effective doses accepted by the residents living in the carbide-brick houses, the staffs working in the carbide-brick houses and the miners working in the bone-coal mining areas of Hubei, Hunan, Jiangxi, Zhejiang and Anhui Provinces is caused by the rising of environmental radioactive level. The investigation of natural background radiation in the bone-coal mining areas indicated that both mining and utilizing bone-coal cause the rise of environmental radioactive level. The ranges of the annual additional effective dose accepted by the residents, staffs and miners is 1.9-6.8 mSv, 0.5-2.0 mSv and 8.2-71 mSv, and with an average of 3.8 mSv, 1 mSv and 40 mSv, respectively. The annual additional effective doses accepted by part residents and staffs exceed the dose limit of 1 mSv for public exposure, and part miners exceed the dose limit of 20 mSv for occupational exposure. And the contribution of dose caused by inhaled radon to the total additional effective dose is over 76%.     

基于网络远程控制的压水堆功率控制半实物仿真

利用压水堆堆芯数学仿真模型,在VC 6.0和MATLAB环境下对压水堆核电站的功率控制系统进行半实物仿真.开发了一个由控制反馈和现场响应两部分所组成的仿真程序,实现了反应堆功率、反应性变化和堆芯控制棒驱动的在线模拟,并且实现了基于Internet网络的微机/工控机控制信号的传输.     

甘氨酸辐射效应的谱学研究

用固体高分辨核磁共振~(13)C谱、电子自旋共振谱以及X衍射光谱研究了多晶甘氨酸的γ辐射稳定性。结果表明甘氨酸在0—140kGy辐照剂量范围内是稳定的,而~(13)C共振谱线则随着辐照剂量的增加而线性地增宽。