Result of monitoring using radiophotoluminescence glass dosimeter in Ningyo-toge Mine

Nagara, Shuichi

Journal of MMIJ, 123(4,5), p.200 - 205, 2007/05

The dose rate has been measured using radiophotoluminescence glass dosimeter (RPLD) in and around the Yotsugi Mill Tailings Pond in Ningyo-toge Mine for a proper understanding of the dose rate distribution. The result shows a relatively higher dose rate at mid- to up-stream of the tailings pond than the rest of it, which is 0.20 to 0.27Gy/h at a height of 1m. The results also show a tendency that dose rates are low at a height of 1m and are high on the ground in the final quarter (January to March).