Gross β activity level of fallout in the environment around Qinshan Nuclear Power Plant

摘要

This paper presents the measurement results of gross β activities in fallout samples collected from the environment around Qinshan Nuclear Power Plant (NPP) during 1993-2002. The gross β activity of 191 samples collected at five monitoring spots were (0.11~3.64) Bq · m~(-2) · d~(-1), with an average of(0.91 +-0.49) Bq · m~(-2) · d~(-1). This value was lower than (1.02+-0.35) Bq·m~(-2)·d~(-1), the average of the samples collected at the reference spot in Hangzhou. It indicated that no obvious rise in the gross β activity level of fallout was observed in ambience of Qinshan NPP.