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Results of the QUENCH-18 Bundle Experiment on Air Ingress and AgInCd absorber behavior

Stuckert, J.; Kalilainen, J.; Lind, T.; Stegmaier, U.; Steinbrück, M.; Zhang, Y.

Abstract (englisch):
The experiment QUENCH-18 on air ingress and aerosol release in an electrical heated test bundle with 24 rods and a length of about 2 m was successfully conducted at KIT on 27 September 2017. This test was performed in the frame of the EC supported ALISA program. It was proposed by XJTU Xi’an (China) and supported by PSI (Switzerland) and GRS (Germany). 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. QUENCH 18 was thus a companion test to the earlier air ingress experiments, QUENCH-10 and -16 (in contrast to QUENCH-18, these two bundle tests were performed without steam flow during the air ingress stage). Additionally, the QUENCH 18 experiment investigated the effects of the presence of two Ag-In-Cd control rods on early-stage bundle degradation (companion test to the QUENCH-13 experiment), and of two pressurized 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 from the peak cladding temperature Tpct ≈ 900 K in an atmosphere of flowing argon (3 g/s) and superheated steam (3.3 g/s) by electrical power increase to the peak cladding temperature of Tpct ≈ 1400 K. ... mehr

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Volltext §
DOI: 10.5445/IR/1000131350
Veröffentlicht am 23.04.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Forschungsbericht/Preprint
Publikationsjahr 2020
Sprache Englisch
Identifikator KITopen-ID: 1000131350
HGF-Programm 32.12.02 (Vor POF, LK 01)
Weitere HGF-Programme 32.02.11 (POF III, LK 01) Auslegungsüberschreitende Störfälle
Verlag Karlsruher Institut für Technologie (KIT)
Umfang 172 S.
Serie Scientific Report NUSAFE ; 3570
Schlagwörter severe accident, air ingress, oxygen starvation, aerosols, zirconium nitrides, reflood, temperature escalation, melt relocation and oxidation
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