低温核供热堆辐射防护安全准则

Guideline of radiation protection and safety for low temperature thermo Supply nuclear reactors

作者提出了低温核供热堆辐射防护安全准则的建议，即①要求半径５０ｋｍ范围内加权人口不超过１０６；②禁区半径为２５０ｍ；③限制发展区半径２ｋｍ；④低温核供热堆正常运行期间，由于放射性向环境释放所致公众个人剂量（全身或有效）不应超过０．１ｍＳｖ／ａ，集体剂量不超过１００ｍａｎ·Ｓｖ／ａ；⑤低温核供热堆事故期间，公众个人剂量不超过５ｍＳｖ，集体剂量不超过１０００ｍａｎ·Ｓｖ；⑥低温核供热堆正常运行期间，放射性流出物（气体、液体）的释放量不应超过国标ＧＢ６２４９规定值的２／５；⑦热网水中的放射性活度不应超过０．３７Ｂｑ／Ｌ；⑧建议应急状态分为三级，即应急待命、厂房应急和场区应急。

A proposal on the guideline of radiation protection and safety for a low temperature thermo supply nuclear reactor has been put forward,namely:(1) Weighted population in a 50km radius region should not exceed 106;(2) The radlus of exclusion area is 250m;(3)The radius of restricted development area is 2km;(4)The individual dose(whole body or effective) to publiccaused by release of radioactivity to environmemt during normal operation of a low temperature thermo supply nuclear reactor should not exceed 0.1mSv/a,and the collective dose should not exceed 100man.Sv/a;(5) Indvidual dose(whole body or effective) during an accident of a low temperature thermo Supply nuclear reactor should not exceed 5mSv,and the collective dose should not exceed 1000man.Sv;(6) For a low temperature thermo Supply nuclear reactor during normal operation the release of radioactive effluent should not exceed two-fifths of the value defined in national standard GB6249;(7) The radionuclide concentrationin the water of heating loop should not exceed 0.37Bq/l;(8)Three emergency grades are proposed:namely,emergency standby,plant emergency and site emergency.