A global fouling factor methodology for analyzing steam generator thermal performance degradation

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Over the past few years, steam generator (SG) thermal performance degradation has led to decreased plant efficiency and power output at numerous PWR nuclear power plants with recirculating-type SGs. The authors have developed and implemented methodologies for quantitatively evaluating the various sources of SG performance degradation, both internal and external to the SG pressure boundary. These methodologies include computation of the global fouling factor history, evaluation of secondary deposit thermal resistance using deposit characterization data, and consideration of pressure loss causes unrelated to the tube bundle, such as hot-leg temperature streaming and SG moisture separator fouling. In order to evaluate ... continued below

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16 p.

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Kreider, M.A.; White, G.A. & Varrin, R.D. Jr. June 1, 1998.

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  • Knolls Atomic Power Laboratory
    Publisher Info: Knolls Atomic Power Lab., Schenectady, NY (United States)
    Place of Publication: Schenectady, New York

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Description

Over the past few years, steam generator (SG) thermal performance degradation has led to decreased plant efficiency and power output at numerous PWR nuclear power plants with recirculating-type SGs. The authors have developed and implemented methodologies for quantitatively evaluating the various sources of SG performance degradation, both internal and external to the SG pressure boundary. These methodologies include computation of the global fouling factor history, evaluation of secondary deposit thermal resistance using deposit characterization data, and consideration of pressure loss causes unrelated to the tube bundle, such as hot-leg temperature streaming and SG moisture separator fouling. In order to evaluate the utility of the global fouling factor methodology, the authors performed case studies for a number of PWR SG designs. Key results from two of these studies are presented here. In tandem with the fouling-factor analyses, a study evaluated for each plant the potential causes of pressure loss. The combined results of the global fouling factor calculations and the pressure-loss evaluations demonstrated two key points: (1) that the available thermal margin against fouling, which can vary substantially from plant to plant, has an important bearing on whether a given plant exhibits losses in electrical generating capacity, and (2) that a wide variety of causes can result in SG thermal performance degradation.

Physical Description

16 p.

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INIS; OSTI as DE99001453

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  • 3. international steam generator and heat exchanger conference, Toronto (Canada), Jun 1998

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  • Other: DE99001453
  • Report No.: KAPL-P--000065
  • Report No.: K--98031;CONF-9806168--
  • Grant Number: AC12-76SN00052
  • Office of Scientific & Technical Information Report Number: 304176
  • Archival Resource Key: ark:/67531/metadc684748

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • June 1, 1998

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  • July 25, 2015, 2:20 a.m.

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  • May 18, 2016, 2:37 p.m.

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Kreider, M.A.; White, G.A. & Varrin, R.D. Jr. A global fouling factor methodology for analyzing steam generator thermal performance degradation, article, June 1, 1998; Schenectady, New York. (digital.library.unt.edu/ark:/67531/metadc684748/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.