Planned experimental studies on natural-circulation and stability performance of boiling water reactors in four experimental facilities and first results (NACUSP)

Experimental investigations on flashing-induced instabilities in one and two-parallel channels: A comparative study

“…The CIRCUS facility [9] is a steam/water facility designed to perform studies on two-phase flow dynamics relevant for the startingup of natural circulation BWRs. CIRCUS is an axially fully scaled, radially lumped version of the Dodewaard reactor [26] .…”

Input Calibration and Validation of RELAP5 Against CIRCUS-IV Single Channel Tests on Natural Circulation Two-Phase Flow Instability

“…Furuya et al [9,10] investigated mechanism of flashing induced instability in SIRIUS-N facility. Stability maps of NCBWR at various pressures and effect of geometric parameters were studied by de Kruijf et al [11,12] and Zboray et al [13]. With the large scale PUMA test facility, Ishii et al [14] and Kuran et al [15] have investigated two-phase flow instability and other thermal-hydraulic phenomena in NCBWR.…”

Experimental thermohydraulic stability map of a Freon-12 boiling water reactor facility with high exit friction

“…The research presented here is part of the NACUSP-project, supported by the European Commission (De Kruijf et al, 2003). Within NACUSP experiments are performed at four experimental facilities in Europe, one of them being DESIRE.…”

“…In order to trigger limit-cycle density-wave oscillations a restriction was added at the exit of the riser (Zboray et al, 1999), and the facility was used to measure the relation between oscillation period and the time that a perturbation travels from the inlet of the core to the exit of the riser . Currently, the facility is being used to perform natural-circulation and stability measurements in the framework of the EU NACUSP-project (De Kruijf et al, 2003). This paper describes one specific series of measurements for an unstable configuration of the DESIRE facility.…”