Changes in Concrete Subjected to Neutron Irradiation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985556%3A_____%2F23%3A00577173" target="_blank" >RIV/67985556:_____/23:00577173 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/978-3-031-44603-0_9" target="_blank" >http://dx.doi.org/10.1007/978-3-031-44603-0_9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/978-3-031-44603-0_9" target="_blank" >10.1007/978-3-031-44603-0_9</a>
Alternative languages
Result language
angličtina
Original language name
Changes in Concrete Subjected to Neutron Irradiation
Original language description
Nuclear energy has several difficulties connected to the production or storage of the radioactive waste. Long-term operation is a process that may prolong the serviceability of the power plant by 10, 20 or more years. Nevertheless, crucial components as the reactor pressure vessel or its surrounding must be proved before enabling this process. Fast-neutron radiation can have several effects on the concrete biological shield around a nuclear reactor. It can cause changes in the lattice structure of some rock forming minerals, resulting in an increase in volume of several percent and this may lead to cracks between the hardened cement paste and the coarse aggregate grain. Fast neutron radiation is converted in concrete to thermal neutrons which generate secondary gamma radiation and heat whereas gamma generates heat as well. Heat followed by drying causes additional shrinkage of the hardened cement paste. All these affects can be observed via digital images processing after the images have been subjected to segmentation, pre-processing, registration and normalization of the illumination. Twelve small holes were drilled in the concrete slab 50 × 50 × 5 cm and the resulting cores of a diameter 4 cm were removed. They were cleaned and polished then inserted into the LVR-15 Research Nuclear Reactor for one year of irradiation with exposure to a flux of 6 ÷ 7 × 1011 neutrons·cm−2s−1. The samples were measured and photographed using the Vertex measuring system before and after irradiation and they were examined to find evidence of any visual changes. The work on digital image processing began in April 2023 and the first outcomes should be available at the end of the year 2023.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20204 - Robotics and automatic control
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Modern Building Materials, Structures and Techniques : MBMST 2023
ISBN
978-3-031-44602-3
ISSN
2366-2557
e-ISSN
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Number of pages
10
Pages from-to
99-108
Publisher name
Springer
Place of publication
Cham
Event location
Vilnius
Event date
Oct 5, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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