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US 2007/0181082 A1Published application
Method of assessing the performance of a steam generator
AssigneeWestinghouse Electric Corp.
InventorJonathan L. Barkich
Life of this patent
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Abstract
A grading system for a pressurized water reactor steam generator secondary side performance that provides a cumulative assessment of tube bundle deposit inventory and characteristics, i.e., scale density and distribution, hard scale collar formation, thermal performance, loose parts management, and steam generator secondary side chemistry performance. Results are summarized in a cumulative quality point average with individual parameter ratings available so that specific performance improvement may be achieved.
Claims15
A method of assessing the performance of a steam generator, comprising the steps of:
- identifying a set of parameters to be measured for performance assessment,
- establishing criteria for levels of performance for each parameter in the set of parameters;
- measuring performance of the steam generator on each of these parameters during operation, if applicable, or during an outage;
- comparing measured performance for each parameters to the criteria for levels of performance;
- converting the measured performance for each parameter to a number of letter grade associated with a applicable criteria for a level of performance;
- calculating a comprehensive number of letter grade from the number of letter grade for each parameter;
- and
- utilizing the comprehensive grade and the umber of letter grades for at least some of the parameters to assess the performance of the steam generator.
5 more elements
Dependencies are inferred from the claim text.