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First Results of the QUENCH-ALISA Bundle Test

Stuckert, J. ORCID iD icon; Steinbrueck, M. ORCID iD icon; Kalilainen, J.; Lind, T.; Zhang, Y.

Abstract (englisch):

The bundle experiment QUENCH-18 on air ingress and aerosol release was successfully conducted at KIT in the frame of the EC supported ALISA program. The primary aims were to examine the oxidation of M5® claddings in air/steam mixture following a limited pre-oxidation in steam, and to achieve a long period of oxygen and steam starvations to promote interaction with the nitrogen. Additionally, the QUENCH-18 experiment investigated the effects of the presence of two Ag-In-Cd control rods, and two pressured unheated rod simulators (60 bar, He). The low-pressurized heater rods (2.3 bar, similar to the system pressure) were Kr-filled. In a first transient, the bundle was heated in an atmosphere of flowing argon and superheated steam by electrical power increase to the peak cladding temperature of 1400 K. During this heat-up, claddings of the two pressurized rods were burst at temperature of 1045 K. The attainment of 1400 K marked the start of the pre-oxidation phase to achieve a maximum cladding oxide layer thickness of about 100 µm. In the air ingress phase, the steam and argon flows were reduced, and air was injected. The first Ag-In-Cd aerosol release was registered at 1350 K and was dominated by Cd bearing aerosols. ... mehr

Postprint §
DOI: 10.5445/IR/1000087685
Veröffentlicht am 17.03.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2018
Sprache Englisch
Identifikator KITopen-ID: 1000087685
HGF-Programm 32.02.11 (POF III, LK 01) Auslegungsüberschreitende Störfälle
Erschienen in 12th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Operation and Safety (NUTHOS-12), Quingdao, China, 14 - 18 October 2018
Veranstaltung 12th International Topical Meeting on Nuclear Reactor Thermal-Hydraulics, Operation and Safety (NUTHOS 2018), Qingdao, China, 14.10.2018 – 18.10.2018
Seiten Paper 918
Schlagwörter severe accident, absorber rods, aerosols, air ingress, nitrides, hydrogen release
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