Modelling the sensitivity of semiconductor detectors for in-situ monitoring of strontium-90 contamination at nuclear decommissioning sites

Turkington, G., Gamage, K. A. A. and Graham, J. (2021) Modelling the sensitivity of semiconductor detectors for in-situ monitoring of strontium-90 contamination at nuclear decommissioning sites. Ninth International Conference on Radiation in Various Fields of Research (RAD 2021), Herceg Novi, Montenegro, 14-18 Jun 2021.

Full text not currently available from Enlighten.

Abstract

In-situ characterisation of strontium-90 contamination in groundwater at nuclear decommissioning sites would represent a novel and cost-saving technology for the nuclear industry. This research considers the application of semiconductor detectors for in-situ detection where the device is placed in groundwater boreholes for monitoring. Monte Carlo simulations were used to model this scenario and the potential performance of such detectors and their sensitivity to strontium-90 and yttrium-90·. The limit of detection for a cadmium telluride sensor upon exposure to strontium-90 decay in groundwater was calculated as 323 Bq/L after a 1 hour measurement and 66 Bq/L after a 24 hour measurement. This performance is less sensitive than widely adopted methods of liquid scintillation, but results can be achieved in a much smaller time frame – days as opposed to weeks.

Item Type:Conference or Workshop Item
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Gamage, Professor Kelum and Turkington, Mr Graeme
Authors: Turkington, G., Gamage, K. A. A., and Graham, J.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Related URLs:

University Staff: Request a correction | Enlighten Editors: Update this record