Nuclear Merchant Ship Reactor Project Quarterly Technical Report for July- September 1958

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Description

Studies of the completed one-tweifth scale model of the power plant resulted in some auxiliary system arrangement changes. The large margin of safety inherent in the NMSR design is further emphasized by continued thermal and hydraulic studies. Core nuclear studies resulted in the elimination of burnable poison, since a probable core life of 822 days at 63.5 Mw can be achieved without burnable poison. Experiments by the Critical Experment Laboratory are described. The fuel enrichment was set at 4.20 wt.% U/sup 235/ for the 16 inner pass fuel elements and 4.60 wt.% U/sup 235/ for the 16 outer pass elements. ... continued below

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Pages: 136

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Creator: Unknown. October 1, 1958.

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Description

Studies of the completed one-tweifth scale model of the power plant resulted in some auxiliary system arrangement changes. The large margin of safety inherent in the NMSR design is further emphasized by continued thermal and hydraulic studies. Core nuclear studies resulted in the elimination of burnable poison, since a probable core life of 822 days at 63.5 Mw can be achieved without burnable poison. Experiments by the Critical Experment Laboratory are described. The fuel enrichment was set at 4.20 wt.% U/sup 235/ for the 16 inner pass fuel elements and 4.60 wt.% U/sup 235/ for the 16 outer pass elements. The change from tube sheet fuel element design to the brazed ferrule design reduced the bundle length from 72 to 69 in. The basic reactor internals designs were established. Modlfications were made to the pressurizer, primary coolant pumps, steam generators, primary gate valves, and thermal insulation in the primary system. An 8 in. maximum lead thickness of secondary shield is required to reduce dose rate in passenger spaces to 0.5 rem/year. An 8 in. required minimum polyethylene thickness of secondary shield was calculated to ensure effective removal of the inelastically scattered fast flux. (For preceding period see BAW- 1118.) (W.D.M.)

Physical Description

Pages: 136

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  • Other Information: Changes from OFFICAL USE ONLY Aug. 15, 1959. Orig. Receipt Date: 31-DEC-60

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  • Report No.: BAW-1124
  • Grant Number: AT(30-0)-274
  • Office of Scientific & Technical Information Report Number: 4212571
  • Archival Resource Key: ark:/67531/metadc1025590

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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

  • October 1, 1958

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Jan. 22, 2018, 1:06 p.m.

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Nuclear Merchant Ship Reactor Project Quarterly Technical Report for July- September 1958, report, October 1, 1958; Lynchburg, Virginia. (digital.library.unt.edu/ark:/67531/metadc1025590/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.