Evaluation of the gamma dose rate inside Egyptian buildings, utilizing theoretical and experimental techniques

Abstract

The in door low gamma dose rate ex po sures due to Egyp tian room build ing ma te ri als are assessed by means of three dif fer ent tech niques: ex per i men tally by us ing a thermoluminescent do sim e ter, the o ret i cally by us ing the gen eral room model and by the Monte Carlo sim u la tion through the RESRAD-BUILD soft ware. The pres ent study aims at val i dat ing the the o ret i cal meth ods so that it can be am ply used for mea sur ing the low dose rates usu ally as so ci ated with the build ing ma te ri als. The mea sured in door dose rates were in the range of 55.92 ± 14.47 to 86.89 ± 16.68 nGyh-1 de pend ing on the po si tion in side the room as ob tained by the thermoluminescent do sim e ter af ter 5 months' ac cu mu la tion. Lower dose rates are ob tained near the door and win dows while higher dose rates are ob tained at the cen ter of the room, and close to the ex tended walls. Com pa ra ble re sults of the dose rates at same po si tions in side the room are ob tained by the RESRAD-BUILD soft ware. The room model is re stricted to the room cen ter and also gives com pa ra ble re sults. The three meth ods showed com pa ra ble re sults, which in turn con firm the rec om men da tion of us ing the o ret i cal ones, with RESRAD-BUILD soft ware be ing more ac cu rate.

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

“…How ever, with the de vel op ment of nu clear programmes, the need to mea sure a short-term dose from man-made sources of ra di a tion has emerged. Be sides out door mea sure ments, pas sive do sim e ters are also used for mea sure ments in in door en vi ron ments [9][10][11]. Many de vel op ments in TLD ma te ri als and in TL read ers (e.g., au tom a ti za tion) [12] have led to in creased use of this type of do sim e ters in en vi ron men tal do sim e try.…”