ASSESSMENT OF FUEL AND FUEL CHANNEL BEHAVIOUR AT HIGH TEMPERATURE DURING A POSTULATED LOCA/LOECC EVENT
13th International Conference on CANDU Fuel - 2016 Aug. 15-18


Presented at:
13th International Conference on CANDU Fuel
2016 Aug. 15-18
Location:
Kingston, ON Canada
Session Title:
Session 14: Safety and Operational Margin Improvement - LOCA

Authors:
H.H. Fan (Candu Energy)
A. Ranger (Candu Energy)
L. Flatt (Candu Energy)
F. Huang (Candu Energy)
T. Laurie (Candu Energy)
H. Zhao (Candu Energy)
W. Zhu (Candu Energy)
Z. Xu (Candu Energy)
  

Abstract

SSESSMENT OF FUEL AND FUEL CHANNEL BEHAVIOUR AT HIGH TEMPERATURE DURING A POSTULATED LOCA/LOECC EVENT H.Z. Fan, A. Ranger, L. Flatt, F. Huang, T. Laurie, H. Zhao, W. Zhu, and Z. Xu Candu Energy Inc. , 2285 Speakman Drive Mississauga, Ontario, Canada L5K 1B1 (Email of corresponding author: hazen.fan@snclavalin.com) ABSTRACT – To demonstrate defence in depth, an assessment of fuel and fuel channel behaviour at high temperature during a postulated large loss-of-coolant accident coincident with loss of the emergency core cooling system has been performed. The assessment of this beyond design basis accident in a CANDU® core is based on recent regulatory requirements [1] for safety analysis and industry guidance for limit of the operating envelope/realistic operating envelope analysis methodologies. Utilising the best understanding and knowledge of high temperature fuel behaviour, the assessment has demonstrated that the moderator water surrounding the fuel channels acts as an effective heat sink, together with other CANDU safety features and measures, to successfully mitigate the consequences of this postulated event. Acknowledgement: The authors wish to acknowledge the numerous contributions of numerous staff at Candu Energy Inc. and the Point Lepreau Generating Station for their solid and sound support of this work. [1] “Safety Analysis – Deterministic Safety Analysis”, CNSC Regulatory Document, REGDOC 2.4.1, May 2014.

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