Improved axial flux shape generator for quick DNB test

Atul A. Karve, Chae Han, Rizwan Uddin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Axial power shapes that develop during power maneuvering in pressurized water reactors must be analyzed to ensure that adequate margin to avoid departure from nucleate boiling (DNB) is maintained during these transients. In order to reduce the number of flux shapes that need to be analyzed in detail to determine DNB ratio (DNBR) often generic axial flux shapes are analyzed and Maximum Allowable Peaking (MAP) limits are determined to conservatively filter those actual axial power shapes that are clearly safe. Current generic MAP limits, obtained for axial flux shapes, generated by a two-parameter based axial flux shape generator, are overly conservative for some power shapes and nonconservative for others leading to unnecessary operational restrictions on conservative cases. A penalty is imposed on nonconservative cases. In order to reduce the number of overly conservative and nonconservative cases, we have developed a new generic axial power shape generator, that is based on three parameters. Generic MAP limits have been developed for the new axial flux shape generator and tested using real flux shapes by plotting the percent deviation of MAP limits for generic flux shapes from the corresponding value for actual flux shapes. New axial flux shape generator, which is clearly superior as it leads to significantly lower percent deviation, will lead to reduced man-hours for detailed DNBR analyses and remove some of the unnecessary operational restrictions imposed by the old flux shape generator.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME/JSME International Conference on Nuclear Engineering, ICONE
EditorsA.S. Rao, R.B. Duffey, D. Elias
PublisherASME
Pages711-717
Number of pages7
Volume4
StatePublished - 1996
Externally publishedYes
EventProceedings of the 1996 4th ASME/JSME International Conference on Nuclear Engineering, ICONE-4. Part 4 (of 5) - New Orleans, LA, USA
Duration: Mar 10 1996Mar 14 1996

Other

OtherProceedings of the 1996 4th ASME/JSME International Conference on Nuclear Engineering, ICONE-4. Part 4 (of 5)
CityNew Orleans, LA, USA
Period3/10/963/14/96

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Karve, A. A., Han, C., & Uddin, R. (1996). Improved axial flux shape generator for quick DNB test. In A. S. Rao, R. B. Duffey, & D. Elias (Eds.), Proceedings of the ASME/JSME International Conference on Nuclear Engineering, ICONE (Vol. 4, pp. 711-717). ASME.