Plant Transient Analysis of the APPR-1 by Analog Computer Methods ; Task No. IV

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Phase I - Plant Transient Analysis. Behavior of the basic and refined kinetic models differs only slightly. It is therefore suggested that the basic model be used in any studies where the improvement in fidelity attainable fro the refined model is not warranted by the complexities introduced by the addition of function generator to the analog circuitry and derivation of the function to be programmed. The parameter responses of both kinetic models appear to be essentially similar to those of the plant with the exception of the primary pressure. In the pressurizer analysis it was noted that the primary system … continued below

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vi, 197 pages ; illustrations.

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Brondel, J. O. & Tomonto, J. R. October 1, 1958.

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Phase I - Plant Transient Analysis. Behavior of the basic and refined kinetic models differs only slightly. It is therefore suggested that the basic model be used in any studies where the improvement in fidelity attainable fro the refined model is not warranted by the complexities introduced by the addition of function generator to the analog circuitry and derivation of the function to be programmed. The parameter responses of both kinetic models appear to be essentially similar to those of the plant with the exception of the primary pressure. In the pressurizer analysis it was noted that the primary system pressure surges of the model should be higher than those of the plant because of the adiabatic steam compression assumed in the model derivation. the fact that the mode surge is very much greater indicates that the compression process is far from adiabatic. A more detailed and complex model of the pressurizer, one that evaluates heat transfer in the steam pocket boundaries, would therefore reduce the costly conservatism otherwise necessary in the specification of pressurizer vessel size. Phase II - Xenon Reactivity Transients. On the basis of this study an analog computer circuit has been presented which accurately represents bank motion during Xe135 transients. In order to determine the adequacy of this model comparison was made with three sets of experiments conducted on the APPR-1. It was found that a weighting or distribution factor was necessary to obtain agreement with the experimental data. The magnitude of the weighting factor varies between 1.30 and 1.40 for equilibrium Xe125 and between 1.48 and 1.62 for transient Xe135 for the experiments compared. There is limited experimental evidence that the weighting factor is decreasing with core burn out.

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vi, 197 pages ; illustrations.

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Digitized from microopaque cards.

APPR-1 Research and Development Program

Includes bibliographical references.

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  • Report No.: APAE-38
  • Grant Number: AT(30-3)-326
  • SuDoc Number: Y 3.AT 7:22/APAE-38
  • Accession or Local Control No: metadc1201944
  • Archival Resource Key: ark:/67531/metadc1201944

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  • October 1, 1958

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  • Aug. 15, 2019, 10:26 p.m.

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  • April 23, 2020, 6:03 p.m.

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Brondel, J. O. & Tomonto, J. R. Plant Transient Analysis of the APPR-1 by Analog Computer Methods ; Task No. IV, report, October 1, 1958; Schenectady, New York.. (https://digital.library.unt.edu/ark:/67531/metadc1201944/: accessed October 6, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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