PCI Risk Assessment Model
The main objective of the reported study was developing a method for predicting PCI failure risk in PWR fuel during Condition 2 transients that would strike a balance between simplicity and accuracy, allow for straightforward implementation within a transient analysis methodology or core monitoring system, and include treatment of the most important PCI factors. The developed method has the following features: 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, replaces a bounding method with a best estimate one. It allows calculating failure risk for a given ramp power or establishing a ramp power corresponding to a certain failure probability, when relevant uncertainties are considered, provides for accuracy comparable to a fuel performance code in calculating PCI failure risk in ramp tests representative of Condition 2 transients, offers a way to infer the safe threshold from ramp test data.
Dmitry Paramonov
Westinghouse Electric Company Monroeville, PA, US
国际会议
18th International Conference on Nuclear Engineering(第18届国际核能工程大会 ICONE 18)
西安
英文
1-7
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）