1993—2017年广东省近岸海域海水137Cs活度浓度水平

Activity Concentration of 137Cs in Seawater from Coastal Areas of Guangdong, China, in the year of 1993-2017

采用γ能谱法和放射化学分析法对大亚湾核电站、阳江核电站、台山核电站周围海域及非核电周围海域海水137Cs活度浓度水平进行了监测,分析了核电液态流出物排放对附近海域海水的影响。结果表明,大亚湾核电早期由于异常排放导致附近海域海水137Cs活度浓度显著高于本底水平,此后恢复至本底水平;阳江核电周围海域海水137Cs活度浓度变化范围为0.49~4.77 Bq/m3;台山核电周围海域海水137Cs活度浓度变化范围为<0.11~2.21 Bq/m3;非核电周围海域海水137Cs活度浓度变化范围为0.62~2.52 Bq/m3。广东省近岸海域海水137Cs活度浓度在本底水平范围内波动。

The 137Cs activity concentration in seawater around Daya Bay, Yangjiang and Taishan NPPs, and from other coastal areas in Guangdong, is presented. And the impact of nuclear power liquid effluent discharge on seawater in the nearby area is analyzed. For Daya Bay Nuclear Power Station, the 137Cs activity concentration in seawater was significantly higher than the background level due to abnormal emissions in the early days, which was then returned to the background level. The concentration of 137Cs in the seawater around Yangjiang Nuclear Power Station varies from 0.49 to 4.77 Bq/m3. The concentration of 137Cs activity in seawater around Taishan Nuclear Power Station ranged from <0.11 to 2.21 Bq/m3. The activity concentration of 137Cs in seawater from other areas ranges from 0.62 to 2.52 Bq/m3. The results show that the concentration of 137Cs in seawater in coastal waters of Guangdong fluctuates within the background level.