Influence of thermal buoyancy on vertical tube bundle thermal density head predictions under transient conditions. [LMFBR]

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The thermal-hydraulic behavior of an LMFBR system under various types of plant transients is usually studied using one-dimensional (1-D) flow and energy transport models of the system components. Many of the transient events involve the change from a high to a low flow with an accompanying change in temperature of the fluid passing through the components which can be conductive to significant thermal bouyancy forces. Thermal bouyancy can exert its influence on system dynamic energy transport predictions through alterations of flow and thermal distributions which in turn can influence decay heat removal, system-response time constants, heat transport between primary and ... continued below

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Pages: 5

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Lin, H.C. & Kasza, K.E. January 1, 1984.

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Description

The thermal-hydraulic behavior of an LMFBR system under various types of plant transients is usually studied using one-dimensional (1-D) flow and energy transport models of the system components. Many of the transient events involve the change from a high to a low flow with an accompanying change in temperature of the fluid passing through the components which can be conductive to significant thermal bouyancy forces. Thermal bouyancy can exert its influence on system dynamic energy transport predictions through alterations of flow and thermal distributions which in turn can influence decay heat removal, system-response time constants, heat transport between primary and secondary systems, and thermal energy rejection at the reactor heat sink, i.e., the steam generator. In this paper the results from a comparison of a 1-D model prediction and experimental data for vertical tube bundle overall thermal density head and outlet temperature under transient conditions causing varying degrees of thermal bouyancy are presented. These comparisons are being used to generate insight into how, when, and to what degree thermal buoyancy can cause departures from 1-D model predictions.

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Pages: 5

Notes

NTIS, PC A02; 3.

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  • Joint meeting of the American Nuclear Society and the Atomic Industrial Forum, Washington, DC, USA, 11 Nov 1984

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  • Other: DE84014765
  • Report No.: CONF-841105-4
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 6475304
  • Archival Resource Key: ark:/67531/metadc1207943

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  • January 1, 1984

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  • July 5, 2018, 11:11 p.m.

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  • Oct. 31, 2018, 5:32 p.m.

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Lin, H.C. & Kasza, K.E. Influence of thermal buoyancy on vertical tube bundle thermal density head predictions under transient conditions. [LMFBR], article, January 1, 1984; Illinois. (digital.library.unt.edu/ark:/67531/metadc1207943/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.