Ambient Radiation Levels in the Vicinity of the Calvert Cliffs Nuclear Power Plant as Determined by Thermoluminescence Dosimetry

摘要

Thermoluminescence dosimetry (TLD) was employed to monitor ambient radiation levels in the vicinity of the Baltimore Gas and Electric Company's Nuclear Power Plant at Calvert Cliffs, Maryland. Radiation field measurements are reported by monthly dose rates from 17 locations, monitored for two annual cycles. Additionally, TLDs were employed to characterize the dose environment to which selected individuals were exposed. This characterization included the assessment of doses received by the individuals, the dose rates characteristic of stone, brick and wood frame/aluminum siding residences, and the dose rate external to the residences. These measurements provide a context for the measurements at Calvert Cliffs by examining the dose and fluctuations in dose rate to real individuals outside the influence of the Calvert Cliffs Nuclear Power Plant. Pressurized ion chamber (dose rate) measurements were made at selected TLD stations, and gross beta radioactivity and gamma-emitting radionuclide activities were quantified in soil samples from the same locations.