Non-destructive testing of coarse aggregates irradiated by neutron and gamma radiation for European project ACES

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F23%3AN0000195" target="_blank" >RIV/26722445:_____/23:N0000195 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.aalto.fi/sites/g/files/flghsv161/files/2023-01/NDE-NucCon_2023_Proceeding.pdf" target="_blank" >https://www.aalto.fi/sites/g/files/flghsv161/files/2023-01/NDE-NucCon_2023_Proceeding.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Non-destructive testing of coarse aggregates irradiated by neutron and gamma radiation for European project ACES

Popis výsledku v původním jazyce

Many European as well as many world nuclear power plants (NPPs) will reach their designed life time. Due to this fact crucial components of NPPs must be proved in order to ensure their capability to sustain load which they were designed for. One of the crucial components is biological shielding concrete surrounding reactor pressure vessel. It consists of water, hardened cement paste and fine or coarse aggregates. The integrity of the shielding concrete is important for protection of NPP’s staff against neutron and gamma radiation. Nevertheless, due to radiation induced volumetric expansion (RIVE), caused by changes in lattice, occurring mostly in siliceous minerals as like quartz, the integrity fails. Aim of presented work is to predict changes in coarse aggregate, with rocks typical for European NPPs, caused by neutron and gamma radiation. Ultrasonic pulse method was employed to determine time of flight and dynamic E-modulus of irradiated rock cylinders of size 10×10 or 10×20 mm. Samples were core bored and brushed by special techniques to guarantee precise shape and dimensions. Exact diameter and length were measured by Vertex instrument. Density was determined with helium and gas pycnometry. Amorphization and percentage content of rock forming minerals was evaluated with X-ray diffraction (XRD) and SEM . Data measured by the above mentioned methods will serve to predictive models being developed by Czech Technical University and Oakridge National Laboratory. This work was conducted within Euratom research and training programme 2019 – 2020 under the grant agreement No 900012.

Název v anglickém jazyce

Non-destructive testing of coarse aggregates irradiated by neutron and gamma radiation for European project ACES

Popis výsledku anglicky

Many European as well as many world nuclear power plants (NPPs) will reach their designed life time. Due to this fact crucial components of NPPs must be proved in order to ensure their capability to sustain load which they were designed for. One of the crucial components is biological shielding concrete surrounding reactor pressure vessel. It consists of water, hardened cement paste and fine or coarse aggregates. The integrity of the shielding concrete is important for protection of NPP’s staff against neutron and gamma radiation. Nevertheless, due to radiation induced volumetric expansion (RIVE), caused by changes in lattice, occurring mostly in siliceous minerals as like quartz, the integrity fails. Aim of presented work is to predict changes in coarse aggregate, with rocks typical for European NPPs, caused by neutron and gamma radiation. Ultrasonic pulse method was employed to determine time of flight and dynamic E-modulus of irradiated rock cylinders of size 10×10 or 10×20 mm. Samples were core bored and brushed by special techniques to guarantee precise shape and dimensions. Exact diameter and length were measured by Vertex instrument. Density was determined with helium and gas pycnometry. Amorphization and percentage content of rock forming minerals was evaluated with X-ray diffraction (XRD) and SEM . Data measured by the above mentioned methods will serve to predictive models being developed by Czech Technical University and Oakridge National Laboratory. This work was conducted within Euratom research and training programme 2019 – 2020 under the grant agreement No 900012.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the international conference on non-destructive evaluation of concrete in nuclar applications

ISBN

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ISSN

1799-490X

e-ISSN

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Počet stran výsledku

12

Strana od-do

315-326

Název nakladatele

Aalto University

Místo vydání

Helsinki

Místo konání akce

Espoo, Finland

Datum konání akce

25. 1. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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