A core-dynamics analysis relevant to some typical current-transient events has been carried out on 80 Mw Energy Amplifier (EA) Prototype fuelled by mixed oxides and cooled by Lead-Bismuth. Fuel and coolant temperature trends relevant to Recovered Beam-trip and Beam-jump events have been preliminarily investigated. Beam-trip results show that the drop in temperature of the core-outlet coolant would be fairly reduced if the beam intensity could be recovered within few seconds. Owing to the low power density in the EAP fuel, the Beam-jump from 50% of the nominal power transient evolves benignly. The worst thinkable current transient Beam-jump with Cold Reactor mainly depends on the coolant flow conditions. In the EAP design, the primary-loop coolant flow is assured by natural convection and is enhanced by a particular system of cover gas injection into the bottom part of the riser. If this system of coolant flow enhancement is assumed in function, even the Beam-jump with Cold Reactor event evolves without severe consequences.
Preliminary Analysis of Beam-Trip and Beam-Jump Events in an ADS Prototype
Carta, M.;Bianchini, G.;D'Angelo, A.
1999-09-27
Abstract
A core-dynamics analysis relevant to some typical current-transient events has been carried out on 80 Mw Energy Amplifier (EA) Prototype fuelled by mixed oxides and cooled by Lead-Bismuth. Fuel and coolant temperature trends relevant to Recovered Beam-trip and Beam-jump events have been preliminarily investigated. Beam-trip results show that the drop in temperature of the core-outlet coolant would be fairly reduced if the beam intensity could be recovered within few seconds. Owing to the low power density in the EAP fuel, the Beam-jump from 50% of the nominal power transient evolves benignly. The worst thinkable current transient Beam-jump with Cold Reactor mainly depends on the coolant flow conditions. In the EAP design, the primary-loop coolant flow is assured by natural convection and is enhanced by a particular system of cover gas injection into the bottom part of the riser. If this system of coolant flow enhancement is assumed in function, even the Beam-jump with Cold Reactor event evolves without severe consequences.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
