A novel approach towards development of real time chemical dosimetry using pulsating sensor-based instrumentation

Journal article

Authors/Editors

Sahoo, Pradeep

Research Areas

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Publication Details

Author list: Malathi N, Sahoo P, Praveen K, Murali N

Publisher: Springer Verlag (Germany) / Akadémiai Kiadó

Place: DORDRECHT

Publication year: 2013

Journal: Journal of Radioanalytical and Nuclear Chemistry (0236-5731)

Journal acronym: J RADIOANAL NUCL CH

Volume number: 298

Issue number: 2

Start page: 963

End page: 972

Number of pages: 10

ISSN: 0236-5731

eISSN: 1588-2780

Languages: English-Great Britain (EN-GB)

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Abstract

The paper presents an innovative approach towards development of real time dosimetry using a chemical dosimeter for measurement of absorbed radiation dose in the range between 1 and 400 Gy. Saturated chloroform solution in water, a well known chemical dosimeter, is used to demonstrate the concept of online measurement of radiation dose. The measurement approach involves online monitoring of increase in conductivity of saturated chloroform solution due to progressive build up of traces of highly conducting HCl during exposure to gamma irradiation. A high performance pulsating sensor-based conductivity monitoring instrument has been used to monitor such real time change in conductivity of solution. A relation between conductivity shift and radiation dose has been established using radiochemical yield value (G value) of HCl. The G value of HCl in saturated chloroform dosimeter has been determined using laboratory developed pulsating sensor-based devices. In this connection dose rate of Co-60 gamma chamber was determined using Fricke dosimeter following a simple potentiometric measurement approach developed in-house besides conventional spectrophotometry. Results obtained from both measurement approaches agreed well. Complete instrumentation package has also been developed to measure real time radiation dose. The proposed real time radiation dosimeter is successfully tested in several measurement campaigns in order to assure its performance prior to its deployment in field.

Keywords

Absorbed radiation dose, Fricke dosimetry, G value of HCl, Pulsating conductivity meter, Real time chemical dosimeter

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