Indoor radon and thoron levels in some residences of Sri Renga Narayana Puram Village, Tirunelveli, India, using solid-state nuclear track detectors

Abstract

The indoor radon and thoron measurements were carried out at Sri Renga Narayana Puram village, Tirunelveli district, Tamil Nadu, which is located nearer to the Nuclear Power Plant, Kudankulam. The survey was performed using a single-entry pin-hole dosimeter with a solid-state nuclear track detector for a period of 90 days. In the present study, the radon and thoron levels have been measured initially for 10 residences using LR-115 Type II films as a detector. The dose assessment due to radon and thoron is calculated. The effective dose of radon and thoron in the corresponding residences has been found to vary from 0.516 to 0.660 mSvy−1 and 0.010 to 0.144 mSvy−1. The total effective dose due to radon and thoron has been calculated which found to vary from 0.545 to 0.791 mSvy−1 with an average value of 0.655 mSvy−1.