【摘要】 中国科学院准备建造的50 GeV质子同步加速器 (简称BPS) 的地点拟选在北京十三陵附近。这里是中国著名的文化古迹和游览区,周围有一些居民点,又处在首都的上风、上水方向。因而,加速器在这里建成运行后对环境的影响,尤其是在辐射方面的影响,是人们非常关心的。本文表明,BPS对其环境的辐射影响是非常小的,围墙外杂散辐射水平可保持低于20毫雷姆/年;采取某些防护措施后,其排放到大气中的短寿命放射性气体所造成的“浸没”剂量不超过10毫雷姆/年;进入水中的放射性物质,按很保守的估计,也不会使排出水的放射性浓度高于中国“放射防护规定”中所列适用于居民饮水的露天水源限制浓度的1/10。采取本文中建议的防护措施后,BPS不构成对环境的污染。本文是在参考欧洲核子研究中心(CERN)及其它高能加速器的经验的基础上,根据中国的有关标准或规定,以及加速器的设计参数,由高能所和CERN合作完成的。更多还原

【Abstract】 The site proposed for the construction of the 50 GeV Proton Synchrotron of theAcademia Sinica near Beijing is close to residential areas and places with a high cul-tural and touristic value. The impact of the construction and operation of the accele-rator on the environment and in particular the radiological impact is of Prime concernto the authorities who licence and support the project. It is shown in the present re-port that the influence on the area outside the fence of the proposed site is indeedvery small: the stray radiation level can be kept below 20 mrem/y outside the fence,and the radioactivity released in air will not, in the most exposed location outsidethe accelerator area, give rise to a submersion does of more than 10mrem/y. Provid-ed some precautions are taken. The release of activity by water will not result inactivity concentrations of more than one tenth of the maximum permissible concentra-tions according to the legislation of the People’ s Republic of China. The estimationsin this report have been based both on calculations and on experience with the CERNand other accelerators. The conclusions arrived at confirm that the radiological im-pact on the environment of high-energy accelerators of such beam powers(~20 kW)are insignificant.更多还原