Estimation of trace element concentration and neutron induced radioactivity in rock samples of different geological compositions for neutron shielding

Pai, B.H.V and Shanbag, A A and Prabhat, Ravi K and Thakare, S V and Jagadeesan, K C and Krishnamoorthy, Agrahara and Sarkar, P. K. and Nandy, Maitreyee (2016) Estimation of trace element concentration and neutron induced radioactivity in rock samples of different geological compositions for neutron shielding. Indian Journal of Pure and Applied Physics, 54 (1). pp. 7-14. ISSN 0975-1041

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Abstract

Rock samples of different geological compositions to be used as coarse aggregates (CA) for preparation of self-compacting concrete (SCC) intended for use as neutron shields in nuclear facilities have been analysed for estimating concentrations of elements like Sc, Co, Fe, Cs, Ta Eu and long lived induced radioactivity using neutron activation. These six elements give rise to long-lived radioactivity in concrete consequent to long-term neutron irradiation. This study has been performed on all the eleven samples of different geological compositions to compare the low-activation characteristics of the CA to determine their suitability for developing SCC based neutron shielding. Our study showed that of the collected samples Quartzite rock exhibits lowest induced activity on neutron irradiation. But it failed the fresh property tests for SCC as observed in an earlier study [8]. Among the CA samples suitable for SCC composition, Dolomite Rock produces lowest activity for all the isotopes studied. Concretes having low radioactivation properties will facilitate mitigating the prevailing radiological waste management problems during decommissioning of nuclear facilities.

Item Type: Article
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Subjects: Engineering > MIT Manipal > Civil Engineering
Depositing User: MIT Library
Date Deposited: 24 Oct 2016 09:16
Last Modified: 24 Oct 2016 09:16
URI: http://eprints.manipal.edu/id/eprint/147383

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