Passive Safety Approaches in Lead/Bismuth-Cooled Accelerator-Driven system
For the safety of Accelerator-Driven Systems (ADS) it is important that the proton beam is shut off soon after the initiation of an accident and that the decay heat can still be removed if the regular heat removal fails. This paper presents a new device for passively blocking the proton beam when a Pb/Bi-cooled core heats up during an accident. An investigation was made of the passive removal of the decay heat and also the heat generated by a proton beam that impinges on the Pb/Bi coolant surface (due to the blocking of the beam pipe with Pb/Bi) during a Loss-of-Heat-Sink accident. A Reactor Vessel Auxiliary Cooling System (RVACS) similar to the one used in PRISM is considered. The results show that a small ADS with a blocked-off beam can be safely cooled for a few days. For larger ADSs vessel creep may start after several hours if the beam is not switched off completely. RVACS with novel features can cool larger ADSs with blocked beam for many days.
Bibliographic Reference: Paper presented: Jahrestagung Kerntechnik, Boon (DE), 23-25 May, 2000
Availability: Joint Research Centre Unit I-21020 Ispra, IT
Record Number: 200011995 / Last updated on: 2000-06-05
Original language: en
Available languages: en