The main objective of the reported study was developing a method for predicting pellet-cladding interaction (PCI) failure probability in pressurized water reactor (PWR) fuel in transient conditions that would strike a balance between simplicity and accuracy, allows for straightforward implementation within a transient analysis methodology or core monitoring system, and include treatment of the most important PCI factors. The developed best estimate method relies on readily calculated/available quantities, such as nodal burn-up, local power, average cladding temperature, and pressure differential across cladding at zero burnup, uses a power increase past gap closure as a failure criterion. The method allows for calculating failure probability for a given rate of power change or establishing a rate of power change corresponding to a certain failure probability. It also provides for accuracy comparable to a fuel performance code when calculating PCI failure probability in ramp tests and offers a way to infer a safe PCI threshold from ramp test data.
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February 2012
Research Papers
Pellet-Cladding Interaction Probability Assessment Model
Dmitry V. Paramonov
Dmitry V. Paramonov
Westinghouse Electric Company
, Cranberry, PA 16066
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Dmitry V. Paramonov
Westinghouse Electric Company
, Cranberry, PA 16066J. Pressure Vessel Technol. Feb 2012, 134(1): 011401 (6 pages)
Published Online: December 1, 2011
Article history
Received:
January 21, 2011
Revised:
May 4, 2011
Online:
December 1, 2011
Published:
December 1, 2011
Citation
Paramonov, D. V. (December 1, 2011). "Pellet-Cladding Interaction Probability Assessment Model." ASME. J. Pressure Vessel Technol. February 2012; 134(1): 011401. https://doi.org/10.1115/1.4004624
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