ML-1-1A CORE STUDIES WITH THE GCRE CRITICAL ASSEMBLY

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Critical assembly studies were conducted tc provide physics and engineering data to aid in developing the Mobile Low-Power Reactor (ML-1). The ML-1-lA core was critical with 59 elements containing 17,906.71 g of U/sup 235/ and had an excess reactivity of 0.381 x 10/sup -2/ DELTA k/k at a moderator temperature of 24.91 deg C. The ratio of maximum element power to core-averaged power was approximately 1.09. The ratio of maximum to core-averaged thermal flux was approximately 1.10. At an 18-deg separation, the shutdown worth of the cadmium-covered control-blade mock-up was 1.14 x 10/sup -2/ DELTA k/k for a 69 element ... continued below

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Pages: 35

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Egen, R.A.; Hogan, W.S.; Dingee, D.A. & Chastain, J.W. November 27, 1959.

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Description

Critical assembly studies were conducted tc provide physics and engineering data to aid in developing the Mobile Low-Power Reactor (ML-1). The ML-1-lA core was critical with 59 elements containing 17,906.71 g of U/sup 235/ and had an excess reactivity of 0.381 x 10/sup -2/ DELTA k/k at a moderator temperature of 24.91 deg C. The ratio of maximum element power to core-averaged power was approximately 1.09. The ratio of maximum to core-averaged thermal flux was approximately 1.10. At an 18-deg separation, the shutdown worth of the cadmium-covered control-blade mock-up was 1.14 x 10/sup -2/ DELTA k/k for a 69 element core. Radial and upper axial reflector-moderator void coefficients were - 0.59 plus or minus 0.07 and -0.36S plus or minus 0.015 x 10/sup -2/ DELTA k/ k.per in., respectively. Two lA production fuel elements were evaluated in the critical assembly core. The results predict that the production elements tested contained roughly the same fuel as the critical assembly element and an additional 772 g of stainless steel equivalent on the average. Radial power and neutron flux distributions were measured in a 19-pin lB fuel element. Fairly uniform distributions were observed. Data to evaluate the thermal utilization of this element were obtained. (auth)

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Pages: 35

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  • Other Information: Orig. Receipt Date: 31-DEC-60

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  • Report No.: BMI-1396
  • Grant Number: W-7405-ENG-92
  • DOI: 10.2172/4206668 | External Link
  • Office of Scientific & Technical Information Report Number: 4206668
  • Archival Resource Key: ark:/67531/metadc876143

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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.

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  • November 27, 1959

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 18, 2016, 7:21 p.m.

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Egen, R.A.; Hogan, W.S.; Dingee, D.A. & Chastain, J.W. ML-1-1A CORE STUDIES WITH THE GCRE CRITICAL ASSEMBLY, report, November 27, 1959; Columbus, Ohio. (digital.library.unt.edu/ark:/67531/metadc876143/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.