Neutron activation analysis for determination of induced radioactivity in concrete of nuclear reactor shielding

P. Lavdanskij; V. Nazarov; N. Stefanov; M. Frontasyeva

doi:10.1007/bf02060591

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 131: Issue 2

Neutron activation analysis for determination of induced radioactivity in concrete of nuclear reactor shielding

Authors:

P. Lavdanskij

P. Lavdanskij Moscow Civil Engineering Institute Moscow (USSR)

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V. Nazarov

V. Nazarov Joint Institute for Nuclear Research Laboratory of Neutron Physics Dubna (USSR)

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N. Stefanov

N. Stefanov Moscow Civil Engineering Institute Moscow (USSR)

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M. Frontasyeva

M. Frontasyeva Joint Institute for Nuclear Research Laboratory of Neutron Physics Dubna (USSR)

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Pages:: 261–270

Online Publication Date:: 14 Aug 2005

Publication Date:: 17 Jun 1989

Article Category:: Research Article

DOI:: https://doi.org/10.1007/bf02060591

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Abstract

The content of binding agent components and aggregates of shielding concrete (portland cement, gabbro, silicate, granite, hematite, magnetite, limestone) has been studied to identify nuclides contributing to the long-lived radioactivity of concretes used in nuclear reactor shielding. Elemental content was determined by neutron activation analysis at the IBR-2 reactor of the Laboratory of Neutron Physics (JINR). It is shown that the nuclides mainly responsible for the long-lived activity are¹⁵²Eu,¹⁵⁴Eu,⁶⁰Co and¹³⁴Cs. Based upon the experimental data obtained, calculations of the specific activity of concrete ingredients being irradiated for 30 years by a unit neutron flux density have been performed, and diagrams of the dependence of the specific activity versus time are presented. It is recommended that the application of such media as magnetite, serpentinite, chromite to shielding structures should be abandoned. Estimations of the dose rate from concrete structures containing various aggregates for the limiting case of semi-infinite space are given. The results obtained can form the basis for the optimal choice of the materials when constructing the concrete shielding of neutron sources.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)