中村　公生・浜田　洋彦・田中　重雄

Radioactivity Monitoring Data in Miyazaki Prefecture (XV)

Kimio NAKAMURA, Hirohiko HAMADA and Shigeo TANAKA

Abstract
In Miyazaki Prefecture, environmental and dietary radioactivity has been monitored since July 1988.

In this paper, we reported on the radioactivity survey data in the year from April 2002 to March 2003.

Grossβ radioactivity concentrations in rain samples collected in Miyazaki Prefecture were at a usual level. We detected Cesium-137 in soil, green tea, and in a full one day ordinary diet by γ-ray spectrometry.

These concentrations were at the same level as other prefectures, and the same as in an ordinary year.

The range of the environmental radiation dose rate was 24.6 - 61.6 nGy/h using a monitoring post and 50-68 nGy/h using a survey meter.

These data are parts of the radioactivity monitoring data consigned by the Ministry of Education,Culture, Sports, Science and Technology.

Key words : radioactivity, γ-ray spectrometry, grossβ

はじめに
本県内の平常時における環境放射能レベルについては昭和63年度に当所に機器が配備されて以来、全国調査の一環として調査を続けているが、このたび平成14年度の調査を終了し、結果を取りまとめたので、その概要を報告する。