Preoperational Power Stability Analysis of the Consumers Big Rock Point Plant

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Summary: An analytical study of the stability of the Big Rock Nuclear Reactor has been performed for the plant as built, and supplements a previous design stability study. The plant has been determined by this analysis to be very stable under every mode of operation anticipated during Phase I of the development program testing. Even under conservative assumptions of system parameters the minimum calculated gain and phase margins do not go below 13.0 db and 46 degrees, respectively. (Nor are these both reached simultaneously for the same operating condition.) These are characteristics of a very stable, well-behaved system. In addition … continued below

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106 pages ; illustrations

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Case, J. M. February 1964.

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Summary: An analytical study of the stability of the Big Rock Nuclear Reactor has been performed for the plant as built, and supplements a previous design stability study. The plant has been determined by this analysis to be very stable under every mode of operation anticipated during Phase I of the development program testing. Even under conservative assumptions of system parameters the minimum calculated gain and phase margins do not go below 13.0 db and 46 degrees, respectively. (Nor are these both reached simultaneously for the same operating condition.) These are characteristics of a very stable, well-behaved system. In addition to this analysis, a second, less conservative series of computations was performed to provide expected realistic closed loop data for comparison with Phase I test results. The most responsive test thus predicted occurs at 60 percent power, 1500 psia, minimum flow, and maximum subcooling. For this case the closed loop peak response of power to reactivity occurs at a frequency of 0.90 cycles per second with an amplitude of 3.90 db. This corresponds to an expected open loop gain margin of 16.5 db and a phase margin of 63 degrees. Although knowledge of reactor transfer function is to be determined from tests designed around the analyzed cases, no operational cases will approach an unstable or even a substantially underdamped situation, according to the analytical predictions.

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106 pages ; illustrations

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Digitized from microopaque cards.

Prepared for the U.S. Atomic Energy Commission Contract AT(04-3)-361.

Includes bibliographic references (page 3).

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  • Report No.: GEAP-4567
  • Grant Number: AT(04-3)-361
  • SuDoc Number: Y 3.At 7:22/GEAP-4567
  • Accession or Local Control No: metadc1201429
  • Archival Resource Key: ark:/67531/metadc1201429

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Technical Report Archive and Image Library

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  • February 1964

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  • Aug. 15, 2019, 10:26 p.m.

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  • Sept. 15, 2023, 1:21 a.m.

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Case, J. M. Preoperational Power Stability Analysis of the Consumers Big Rock Point Plant, report, February 1964; San Jose, California. (https://digital.library.unt.edu/ark:/67531/metadc1201429/: accessed March 23, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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