Post-test calculations of out-of-pile single rod burst experiments with Argentine ZRY-4 tubes using SSYST codes system
Description
The calculations were performed with SSYST-3 code system. The experiments have been carried out with shortened REBEKA simulators. The main goal was to verify whether the model for describing the Zircaloy cladding deformation and rupture at high temperatures (NORA2 model) is able to predict the Argentine cladding material behaviour under such conditions. A good agreement between experimental results and model predictions was found in the range of temperatures from 700 to 8500C (in α phase and first half of α+β transition phase). There were some discrepances at higher temperatures, probably due to the strong influence of heating rate on material properties. According to the results of these post-test calculations, it can be concluded that NORA2 model is able to well describe the Argentine Zircaloy cladding deformation and rupture under LOCA conditions, because there was a good agreement in the range of burst (ballooning) temperatures which are expected in this type of accident. (orig./HP)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Es wurden out-of-pile Einzelstab-Berstexperimente mit dem Programmsystem SSYST-3 nachgerechnet. Die Experimente waren mit verkuerzten REBEKA-Simulatoren und argentinischen Zircaloy-Huellrohren durchgefuehrt worden. Hauptziel der Nachrechnung war die Pruefung der Frage, ob das in SSYST eingebaute Kriechberstmodell NORA-2 auch das argentinische Huellrohrmaterial beschreibt. Zwischen 7000C und 8500C (d.h. in der α-phase und in der ersten Haelfte der α-β-Uebergangsphase) konnte eine gute Uebereinstimmung festgestellt werden. Unterschiede zeigten sich bei hoeheren Temperaturen; sie sind wahrscheinlich auf die hohe Empfindlichkeit des Materialverhaltens in Bezug auf die Aufheizrate zurueckzufuehren. Aufgrund dieser Ergebnisse kann man schliessen, dass das NORA-2 Modell das Verhalten des argentinischen Huellrohrmaterials unter LOCA Bedingungen gut beschreibt. (orig./HP)
Files
Restricted
The record is publicly accessible, but files are restricted to users with access.
Additional details
Publishing Information
- Imprint Pagination
- 63 p.
- Report number
- KFK--4483
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 20034904
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- ALLOY-ZR98SN-4; ATUCHA-2 REACTOR; COMPUTER CALCULATIONS; DEFORMATION; FUEL CANS; LOSS OF COOLANT; PHWR TYPE REACTORS; PWR TYPE REACTORS; REACTOR SAFETY EXPERIMENTS; VERIFICATION
- Descriptors DEC
- ACCIDENTS; ALLOYS; CHROMIUM ADDITIONS; CORROSION RESISTANT ALLOYS; ENRICHED URANIUM REACTORS; HEAT RESISTING ALLOYS; HEAVY WATER COOLED REACTORS; HEAVY WATER MODERATED REACTORS; IRON ADDITIONS; NATURAL URANIUM REACTORS; POWER REACTORS; PRESSURE TUBE REACTORS; REACTOR ACCIDENTS; REACTORS; THERMAL REACTORS; TIN ALLOYS; WATER COOLED REACTORS; WATER MODERATED REACTORS; ZIRCALOY; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS