浙江师范大学校园居室氡浓度及其影响因素

校园是人口密集的场所,居室内空气中氡的浓度过高会对师生的健康造成危害.在浙江师范大学校园中选取了部分学生宿舍、教工宿舍和教学主楼中的部分室内空间进行了氡浓度的测量.结果表明:居室内氡浓度的变化范围为8.4～182.4 Bq·5m-3,低于Ⅰ类民用建筑工程≤200 Bq·5m-3的国家标准.室内氡的浓度主要取决于通风条件,通风不良的居室氡浓度最高时可接近200 Bq·5m-3;不同的建筑装修材料、楼层、气候条件、地面的孔隙和裂隙的发育程度也会影响氡的浓度.氡浓度的日变化特征为22:00至次日10:00浓度较高,10:00-22:00相对较低.建议师生注意室内的空气流通;在已建或在建的建筑物中,采取相应的降氡、防氡措施,以确保师生免遭氡的危害.

Indoor radon consistency and influence factors in Zhejiang Normal University

Campus is a populous place. High indoor radon consistency is deleterious to health of teachers and students. Indoor radon consistency was determined to be high in students and teachers flats, classrooms in Zhejiang Nomal University. The range of radon consistency was 8.4~182.4 Bq5m~{-3}. The radon consistency in different rooms lies on their ventilation, and can be also affected by different architectural materials floors, climate, hole and cranny in ground and wall. The radon consistency changes in one day, higher in 10 p.m. to morrow 10 a.m., lower in 10 a.m. to 10 p.m.. Advices were put forward: (1)paying attention to ventilation in rooms frequently; (2)taking relevant engineering measures to decline radon consistency in living rooms in constructed or constructing building for avoiding radiation harm to teachers and students.