Microstructural Evaluation of HR6W and T92 after Supercritical CO2 exposure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F20%3AN0000175" target="_blank" >RIV/26722445:_____/20:N0000175 - isvavai.cz</a>

Result on the web

<a href="https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1111.pdf" target="_blank" >https://arhiv.djs.si/proc/nene2020/pdf/NENE2020_1111.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Microstructural Evaluation of HR6W and T92 after Supercritical CO2 exposure

Original language description

The supercritical carbon dioxide Brayton cycle is being considered as an innovative technology with potential for replacement of conventional steam cycles. Increased efficiency and operational flexibility at specific operational parameters is expected that can be beneficial for various power sources including nuclear, fossil or renewable. The optimization of the design of supercritical CO2 (sCO2) Brayton cycle and of its main components is essential to achieve requested parameters of the thermal cycle. The optimization requires not only the cycle layout and the components design studies but also selection of the materials. The materials research is critical in the field of the sCO2 technology development due to the fact that the main benefits of the sCO2 cycles are gained at extreme operational conditions such as temperatures above 550°C and pressures up to 25 MPa. The corrosion behaviour of the materials selected for the high temperature components in the sCO2 environment was investigated. This work addresses the testing of the resistance HR6W and T92 materials before and after exposure. The results summarise the experimental campaign characterized by 1000 hours of exposure of the selected steels in the sCO2 at 550°C and 25 MPa. The materials compatibility testing was conducted for materials that were identified as potential candidates for high temperature components of the sCO2 cycles such as heat exchangers or pipes. Testing was completed for samples in the unstressed conditions. The samples exposed to sCO2 showed some oxidation, the extent of which varied considerably between the materials tested. Examination of cross sections of the samples showed perceptible differences caused by the sCO2 exposure.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2020

Confidentiality

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

Article name in the collection

NENE 2020 conference proceedings

ISBN

978-961-6207-49-2

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

1-8

Publisher name

Nuclear Society of Slovenia

Place of publication

Řež

Event location

Portorož, Slovenia

Event date

Sep 9, 2020

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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