东、南海近岸海域环境综合调查中γ能谱数据浅析

ELEMENTARY ANALYSIS OF GAMMA SPECTROMETRY DATA OF THE ENVIRONMENTAL SURVEY ON OFFSHORE WATERS OF THE EAST AND THE SOUTH CHINA SEA

广东省环境辐射研究监测中心 (GERC)能谱室 ,在 1999年国家环境保护总局组织开展的东、南海近岸海域环境综合调查工作中 ,承担了 13个测站共 2 4个样品 (沉积物 9个、海水 13个和海鱼 2个 )的天然放射性核素 (2 3 8U、2 2 6Ra、2 3 2 Th和 40 K)及人工放射性核素 13 7Cs含量的测量工作。本文主要介绍测量结果及其对数据的初步分析。结果显示 :对大亚湾核电站周围近海各类样品 ,本次测量结果与常规监测 (1993年 12月～ 1998年 12月 )结果及本底调查 (1990年 12月～ 1992年 3月 )结果之间 ,均没有发现显著性差异 ;且与广东省内其他测站的样品之间 。

A comprehensive environmental survey on offshore water of the East and the South China Sea was sponsored by Chinese National Environmental Protection Bureau in 1999. The radioactivity of natural radionuclides 238 U, 226 Ra, 232 Th, 40 K and manmade radionuclide 137 Cs in 24 samples (9 sea sediments, 13 seawaters and 2 sea fishes) from 13 sampling stations were measured with gamma spectrometry by Guangdong Environmental Radiation Research and Monitoring Centre (GERC). The paper introduces the measurement results with preliminary data analysis. The measurement results of all kind samples from the sea around Daya Bay Nuclear Power Station (GNPS) were found no remarkable differences to that from the routine monitoring (from Dec. 1993 to Dec. 1998) and the radiological background survey (from Dec. 1990 to Mar. 1992) in the area. The same conclusion can also be made between the samples from stations around GNPS and other stations in Guangdong province. (