CFD Model of CANDU Calandria Vessel Retention During Severe Accidents
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
C1-1 Molten Core Natural Convection, Physico-Chemical Phenomena, and Direct Containment Heating by D

Fei Song (Atomic Energy of Canada Limited)
Boris Lekakh (Atomic Energy of Canada Limited)
Ken Hau (Atomic Energy of Canada Limited)


A CFD model is developed for the calandria vessel retention of generic CANDU ®1 reactors, including the Enhanced CANDU 6 ®2 (EC6®2), the Advanced CANDU Reactor®3 (ACR- 1000®3), and the CANDU 6, during a postulated severe accident. The model is focused on the thermal hydraulics in a full-scale calandria vessel when terminal debris bed is formed during a loss of coolant accident, which is bounding in terms of potential challenge to calandria vessel integrity. The CFD model is benchmarked against MAAP4-CANDU analysis of ACR-1000. The results show that with ex-vessel cooling available, the core debris can be well contained inside the calandria vessel, demonstrating the successful in-vessel retention strategy in the ACR-1000 severe accident management.

Individual Conference-Paper Copies (Electronic Where Available):

  • For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
  • For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
  • Contact the CNS office to order reprints.