Debris Impact on Emergency Coolant Recirculation

Workshop Proceedings, Albuquerque NM, USA, 25-27 February 2004

image of Debris Impact on Emergency Coolant Recirculation

This conference proceedings examines the most recent research and developments related to the impact of debris on emergency coolant recirculation.  Held in Albuquerque, New Mexico in February 2004, this proceedings had sessions on safety assessment and regulatory requirements, experimental work, analytical work, and industry solutions.  The proceedings present the papers presented as well as a summary of discussions that took place.





Break Characteristic Modelling for Debris Generation Following a Design Basis Loss of Coolant Accident

Nuclear Energy Agency

An important safety concern regarding long-term recirculation cooling following a loss of coolant accident (LOCA) is the transport of debris materials to interceptors (i.e. trash racks, debris screens, suction strainers) inside containment and the potential for debris accumulation to result in adverse blockage effects. Debris resulting from a LOCA, together with pre-existing debris, could block the emergency core cooling system (ECCS) debris interceptors and result in degradation or loss of recirculation flow margin. Potential debris sources can be divided into three categories: (1) debris that is generated by the LOCA and is transported by blowdown forces (e.g. insulation, paint); (2) debris that is generated or transported by washdown; and (3) other debris that existed before a LOCA (dust, sand, etc.). Each debris source is separately evaluated to estimate the quantity and other ...


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