High Power Density Development Project: Fourteenth Quarterly Progress Report, July-September 1963

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Description

Development of nuclear reactor cores having high power density, long fuel life, and low fabrication costs is the objective of this program sponsored by the AEC. Five tasks are in progress: (1) Task 1A-High Power Density Fuel Development. The number of assemblies has been reduced to seven as a result of the failure of two pellet fuel assemblies. The average burnup of the group operating as of September 1 is 7500 MWD/T. (2) Task 1B-Fuel Fabrication Development. Assembly. Assembly 12S gave positive signals of being a leaker under the multi-type in-core sampler and was declared failed based on the in-core … continued below

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v, 58 pages ; illustrations.

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Holladay, R. L. October 1963.

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Development of nuclear reactor cores having high power density, long fuel life, and low fabrication costs is the objective of this program sponsored by the AEC. Five tasks are in progress: (1) Task 1A-High Power Density Fuel Development. The number of assemblies has been reduced to seven as a result of the failure of two pellet fuel assemblies. The average burnup of the group operating as of September 1 is 7500 MWD/T. (2) Task 1B-Fuel Fabrication Development. Assembly. Assembly 12S gave positive signals of being a leaker under the multi-type in-core sampler and was declared failed based on the in-core results and visual observation of a cracked rod. Modifications to the instrumented fuel assembly probes were made by removing the failed flow meter rotors to allow continued use of the flux detectors and thermocouples. Flux detectors and thermocouples performed properly after reactor start up. Flux wire tubes were found to be kinked such that their use was prohibited. (3) Task II-Stability, Heat Transfer and Fluid Flow. A series of noise recordings of fluxes, flows, and temperatures has been made at 91 MWt at the Big Rock Point plant. Preliminary analyses of some of the these records were made to obtain noise amplitude as a function of frequency. Thermocouple response tests were performed to verify the temperature measurement obtained during the steady-state noise tests at Big Rock. (4) Task III-Physics Development. Plans for achieving optimum performance from the Big Rock plant are being based on the concept of maintaining a fixed power shape throughout each operating cycle. The desired shape for the present cycle has been computed. Methods of selecting control rod patterns to maintain this shape are being investigated for use in the on-line computer. The computer was put on line during plant startup in August, and is presently performing satisfactorily, with the loss of only a few calculational cycles occurring through the end of the report period. (5) Task IV-Co-Ordination and Test Planning. Eight developmental fuel assemblies were delivered to the site, installed, and verified; and three instrumented assemblies were modified and installed in the Big Rock Point core during the quarter. Re-evaluation and verification of the operating limits for the Phase I tests is being made, based on more precise power distributions fro the gamma scan tests performed last spring.

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v, 58 pages ; illustrations.

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Digitized from microopaque cards.

Prepared under USAEC Contract AT(04-3)-361.

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  • Report No.: GEAP-4391
  • Grant Number: AT(04-3)-361
  • SuDoc Number: Y 3.At 7:22/GEAP-4391
  • Accession or Local Control No: metadc1201394
  • Archival Resource Key: ark:/67531/metadc1201394

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  • October 1963

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  • Aug. 15, 2019, 10:26 p.m.

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  • June 11, 2020, 11:42 a.m.

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Holladay, R. L. High Power Density Development Project: Fourteenth Quarterly Progress Report, July-September 1963, report, October 1963; San Jose, California.. (https://digital.library.unt.edu/ark:/67531/metadc1201394/: accessed September 9, 2026), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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