Effect of reactor conditions on MSIV (main steam isolation valves)-ATWS power level

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In a boiling water reactor (BWR) when there is closure of the main steam isolation valves (MSIVs), the energy generated in the core will be transferred to the pressure suppression pool (PSP) via steam flows out of the relief valves. The pool has limited capacity as a heat sink and hence, if there is no reactor trip (an ATWS event), there is the possibility that the pool temperature may rise beyond acceptable limits. The present study was undertaken to determine how the initial reactor conditions affect the power during an MSIV-ATWS event. The time of interest is during the 20-30 ... continued below

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Pages: 7

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Diamond, D.J. January 1, 1987.

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Description

In a boiling water reactor (BWR) when there is closure of the main steam isolation valves (MSIVs), the energy generated in the core will be transferred to the pressure suppression pool (PSP) via steam flows out of the relief valves. The pool has limited capacity as a heat sink and hence, if there is no reactor trip (an ATWS event), there is the possibility that the pool temperature may rise beyond acceptable limits. The present study was undertaken to determine how the initial reactor conditions affect the power during an MSIV-ATWS event. The time of interest is during the 20-30 minute period when it is assumed that the reactor is in a quasi-equilibrium condition with the water level and pressure fixed, natural circulation conditions and no control rod movement or significant boron in the core. The initial conditions of interest are the time during the cycle and the operating state. 4 refs., 2 tabs.

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Pages: 7

Notes

NTIS, PC A02/MF A01; 1.

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  • California State Air Resources Board, Los Angeles, CA, USA, 15 Nov 1987

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  • Other: DE87012121
  • Report No.: BNL-NUREG-39929
  • Report No.: CONF-871101-50
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 6156331
  • Archival Resource Key: ark:/67531/metadc1112834

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • January 1, 1987

Added to The UNT Digital Library

  • Feb. 22, 2018, 7:45 p.m.

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  • March 23, 2018, 6:18 p.m.

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Diamond, D.J. Effect of reactor conditions on MSIV (main steam isolation valves)-ATWS power level, article, January 1, 1987; United States. (digital.library.unt.edu/ark:/67531/metadc1112834/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.