Microstructural Evaluation of AISI 321H After Supercritical Water Exposure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F20%3AN0000174" target="_blank" >RIV/26722445:_____/20:N0000174 - isvavai.cz</a>

Výsledek na webu

<a href="https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1110.pdf" target="_blank" >https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1110.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructural Evaluation of AISI 321H After Supercritical Water Exposure

Popis výsledku v původním jazyce

Heat-resistant stainless steel AISI 321H - 08Ch18N10T is main material used for internal components of nuclear reactors VVER 440 and 1000. New types of Generation IV reactors, specifically Supercritical Water-Cooled Reactor (SCWR) can use some of materials which are already used in Generation II reactors, but corresponding experimental data are still needed. SCWR will operate at a pressure 25 MPa and core temperature from 350 to 625 °C. In that purpose, several cycles to supercritical water at 495 °C and 25 MPa took place in supercritical water loop (SCWL). Duration of each exposure was 550 h, 123 h and 1001 h, it means 1674 h in total. Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) with Electron Backscatter Diffraction (EBSD) in combination with X-Ray Diffraction (XRD) and Raman Spectroscopy (RS) were used to evaluate the microstructure of AISI 321H after the exposure to supercritical water. All these methods confirmed a thick non-uniform layer, which consists of magnetite crystals with thickness less than 1µm. Density of crystals increased after the second and third exposure. Crystallography of matrix have not changed after all exposures.

Název v anglickém jazyce

Microstructural Evaluation of AISI 321H After Supercritical Water Exposure

Popis výsledku anglicky

Heat-resistant stainless steel AISI 321H - 08Ch18N10T is main material used for internal components of nuclear reactors VVER 440 and 1000. New types of Generation IV reactors, specifically Supercritical Water-Cooled Reactor (SCWR) can use some of materials which are already used in Generation II reactors, but corresponding experimental data are still needed. SCWR will operate at a pressure 25 MPa and core temperature from 350 to 625 °C. In that purpose, several cycles to supercritical water at 495 °C and 25 MPa took place in supercritical water loop (SCWL). Duration of each exposure was 550 h, 123 h and 1001 h, it means 1674 h in total. Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) with Electron Backscatter Diffraction (EBSD) in combination with X-Ray Diffraction (XRD) and Raman Spectroscopy (RS) were used to evaluate the microstructure of AISI 321H after the exposure to supercritical water. All these methods confirmed a thick non-uniform layer, which consists of magnetite crystals with thickness less than 1µm. Density of crystals increased after the second and third exposure. Crystallography of matrix have not changed after all exposures.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

NENE 2020 conference proceedings

ISBN

978-961-6207-49-2

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1-6

Název nakladatele

Nuclear Society of Slovenia

Místo vydání

Ljubljana, Slovenia

Místo konání akce

Portorož, Slovenia

Datum konání akce

9. 9. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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