EXPERIMENTAL STUDY OF DAMAGED CR-COATED FUEL CLADDING IN POST-ACCIDENT CONDITIONS

Authors

  • Petr Červenka Czech Technical University in Prague, UJP PRAHA a.s., Czech Republic
  • Jakub Krejčí UJP PRAHA a.s., Czech Republic
  • Ladislav Cvrček Czech Technical University in Prague, Czech Republic
  • Vojtěch Rozkošný UJP PRAHA a.s., Czech Republic
  • František Manoch UJP PRAHA a.s., Czech Republic
  • David Rada UJP PRAHA a.s., Czech Republic
  • Jitka Kabátová UJP PRAHA a.s., Czech Republic

DOI:

https://doi.org/10.14311/APP.2020.28.0001

Keywords:

ATF, cladding embrittlement, coating, LOCA, oxidation

Abstract

To enhance the safety of nuclear power, the focus of researchers all around the world has recently mainly objected on the development of Accident Tolerant Fuels. Especially the Chromium coating of current Zirconium based cladding has been widely suggested and discussed for its immense positive effect on overall cladding properties. Nevertheless, it was observed that during the first stage of the Loss of Coolant Accident, cracks appear in the Cr coating due to its inability to tolerate higher plastic strain. Therefore, experimental methodology used in this article focuses on testing fuel cladding with damaged Cr coating after the high-temperature transient. The impact of cracks on degradation of cladding mechanical properties was observed using optical microscopy, ring compression test, microhardness, and evaluating hydrogen content and weight gain.

Author Biographies

Petr Červenka, Czech Technical University in Prague, UJP PRAHA a.s., Czech Republic

Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Material Engineering, Karlovo náměstí 293/13, Prague, 12000, Czech Republic

UJP PRAHA a.s., Nad Kamínkou 1345, Praha-Zbraslav, 15610, Czech Republic

Jakub Krejčí, UJP PRAHA a.s., Czech Republic

UJP PRAHA a.s., Nad Kamínkou 1345, Praha-Zbraslav, 15610, Czech Republic

Ladislav Cvrček, Czech Technical University in Prague, Czech Republic

Czech Technical University in Prague, Faculty of Mechanical Engineering, Department of Material
Engineering, Karlovo náměstí 293/13, Prague, 12000, Czech Republic

Vojtěch Rozkošný, UJP PRAHA a.s., Czech Republic

UJP PRAHA a.s., Nad Kamínkou 1345, Praha-Zbraslav, 15610, Czech Republic

František Manoch, UJP PRAHA a.s., Czech Republic

UJP PRAHA a.s., Nad Kamínkou 1345, Praha-Zbraslav, 15610, Czech Republic

David Rada, UJP PRAHA a.s., Czech Republic

UJP PRAHA a.s., Nad Kamínkou 1345, Praha-Zbraslav, 15610, Czech Republic

Jitka Kabátová, UJP PRAHA a.s., Czech Republic

UJP PRAHA a.s., Nad Kamínkou 1345, Praha-Zbraslav, 15610, Czech Republic

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Published

2020-12-01