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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.

 

 

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Uncertainties in the ECC Strainer Knowledge Base – The Canadian Regulatory Perspective

Nuclear Energy Agency

When the Canadian Nuclear Safety Commission (CNSC) became aware of concerns relating to the collection of debris at suction strainers for emergency core cooling (ECC) systems following the incident in Barsebäck, Sweden, it issued a notice to Canadian utilities requiring them to review their ECC strainer capability in view of the potential increase in pressure drop, and address any deficiencies. During this review period, a number of uncertainties were identified as needing resolution, principally those items directly related to the head loss across the strainer (both in the short and long term), as well as a few secondary issues such as the likelihood of air ingestion. Canadian utilities contracted Atomic Energy of Canada Limited (AECL), through the CANDU owners group (COG), to perform extensive fundamental testing to establish the important parameters governing ECC strainer performance. AECL expanded upon this knowledge base with additional tests to confirm proposed designs for specific applications. As a result of all the testing, a substantial body of ...

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