Bulk temperature measurement in thermally striped pipe flows

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Description

The hot leg flows in some Pressurized Water Reactor (PWR) designs have a temperature distribution across the pipe cross-section. This condition is often referred to as a thermally striped flow. Here, the bulk temperature measurement of pipe flows with thermal striping is explored. An experiment is conducted to examine the feasibility of using temperature measurements on the external surface of the pipe to estimate the bulk temperature of the flow. Simple mixing models are used to characterize the development of the temperature profile in the flow. Simple averaging techniques and Backward Propagating Neural Net are used to predict bulk temperature ... continued below

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132 p.

Creation Information

Lemure, N.; Olvera, J.R. & Ruggles, A.E. December 1, 1995.

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Description

The hot leg flows in some Pressurized Water Reactor (PWR) designs have a temperature distribution across the pipe cross-section. This condition is often referred to as a thermally striped flow. Here, the bulk temperature measurement of pipe flows with thermal striping is explored. An experiment is conducted to examine the feasibility of using temperature measurements on the external surface of the pipe to estimate the bulk temperature of the flow. Simple mixing models are used to characterize the development of the temperature profile in the flow. Simple averaging techniques and Backward Propagating Neural Net are used to predict bulk temperature from the external temperature measurements. Accurate bulk temperatures can be predicted. However, some temperature distributions in the flow effectively mask the bulk temperature from the wall and cause significant error in the bulk temperature predicted using this technique.

Physical Description

132 p.

Notes

INIS; OSTI as TI96013410

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  • Other Information: PBD: Dec 1995

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  • Other: TI96013410
  • Report No.: NUREG/GR--0015
  • DOI: 10.2172/270808 | External Link
  • Office of Scientific & Technical Information Report Number: 270808
  • Archival Resource Key: ark:/67531/metadc668328

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  • December 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • April 22, 2016, 6:41 p.m.

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Lemure, N.; Olvera, J.R. & Ruggles, A.E. Bulk temperature measurement in thermally striped pipe flows, report, December 1, 1995; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc668328/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.