The objectives of the Phébus FP experimental programme and main findings

Simulation of the PHEBUS FPT-1 experiment using MELCOR and exploration of the primary core degradation mechanism

“…On the other hand, the PHEBUS FPT1 fission product transport research has been able to uncover that transported fission products' chemical speciation, such as caesium, molybdenum and iodine compounds, were quite different from what was previously assumed. This progress improved source term evaluations for severe accidents (Clement and Zeyen, 2013). direction, the core of PHEBUS is represented by 2 rings.…”

Stand-Alone Containment Analysis of the Phébus FPT Tests with the ASTEC and the MELCOR Codes: The FPT-0 Test

“…A schematic sketch of the facility is shown in Figure 1 [3]. The first component is the driver core and its cooling circuit, encapsulated inside a cylindrical shroud.…”

“…Different experimental campaigns were carried out investigating specific phenomena or the coupling among two or more phenomena, although only the international Phébus experimental program was devoted to the study of a SA in its different phases and aspects, the core degradation, the transport of FPs, and structural materials through the primary system, and finally their release into the containment [3]. This experimental campaign was carried out in the integral Phébus facility at the "Institut de Radioprotection et de Sûreté Nucléaire" (IRSN) laboratories in Cadarache (F).…”

A comparison of core degradation phenomena in the CORA, QUENCH, Phébus SFD and Phébus FP experiments

“…The international Phébus Fission Product program (Phébus FP) (Clément and Zeyen, 2013) investigated key phenomena involved in LWR severe accident sequences through five in-pile integral experiments, Table 4, in the Phébus reactor at Cadarache, operated by the "Commissariat 'a l'Energie Atomique" (CEA). The facility provided prototypic reactor conditions which allowed the study of basic phenomena governing core degradation through to the late phase (melt pool formation), hydrogen production, fission product (FP) release and transport, circuit and containment phenomena, and iodine chemistry.…”