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ANP QUARTERLY PROGRESS REPORT In conclusion it can be said that at the 200-ft altitude the ground-scattered contributions to air- scattering experiments at the TSF are dependent IO 2- c 3 5 e e -D 2 - - X I 3 LL J z 05 $ !- 3 2 02 J 4 5 01 W I !- yo05 - 5 L 002 0 01 0 40 80 (20 160 200 h. REACTOR-DETECTOR ALTITUDE (ftl Fig. 12.10. Comparison of Scattered-Neutron Calculations with Preliminary Differential Experi- ment. 150 on the source geometry; however, the contributions will be small, that is, not more than 5%, in all cases. 10 - 5 * - c h E- 2 -D - X I 3 LL z 05 8 c 3 Y 02 1 a 8 01 I + 5 W 005 W [L 002 spem?l 2-01-056-3-T22 0 01 0 20 40 60 80 100 120 140 160 180 200 h, REACTOR-DETECTOR ALTITUDE (ft) Fig. 12.11. Comparison of Scattered-Neutron Calculations with GE-ANP R-1 Mockup Experiment. 7 P i
A measurement of the removal cross section of lithium was made at the Lid Tank Shielding Fa- cility (LTSF), and the experimentation on the GE-ANP helical air ducts was continued. Prepa- rations for the circulating-fuel ref lector-moderated reactor and shield mockup tests are nearing com- pletion. EFFECTIVE NEUTRON REMOVAL CROSS SECTION OF LITHIUM G. T. Chapman J. M. Miller C. L. Storrs’ An effective neutron removal cross section (aR) of 1.01 k 0.04 barns was determined for lithium at the LTSF. This value was obtained from measurements made in a medium of oil behind a slab of metallic lithium which was placed against the slab of lithium (p = 0.53 g/cm3) was con- ed by filling a 122-cm-dia by 29.1-cm stain- nk with melted lithium and allowing the material to solidify. The walls of the tank were reinforced with a framework constructed of ‘General Electric Company. 13. LID TANK SHIELDING FACILITY G. T. Chapman J. M. Miller Physics Division J. €3. Dee W. H. C. Woodsum H. McCool Pratt & Whitney Aircraft PERIOD ENDING DECEMBER 70,1954 lnconel window in the wall adjacent to the source. The presence of the lnconel resulted in CI 9-Mev capture gamma rayI2 and the photoneutron contri- bution from this high-energy gamma and the naturally occurring deuterium in the oil markedly affected the thermal-neutron measurements in oi I (no lithium present) for distances greater than 120 em from the source (Fig. 13.2). A 3.81-cm- thick bismuth slab placed in the oil approximately 45 cm from the source suppressed this gamma ray and the resulting photoneutrons without my ob- servable effect on any other component of the thermal-neutron flux. The lithium tank was then placed in the oil tank adjacent to the source, and thermal-neutron flux 2J. B. Dee, D. K. Trubey, and W. Steyert, ANP QUQT. Prog. Rep. Sept. 10, 1954, ORNL-1771, p 164. ment. ,APPROXIMATE LEVEL ,fEeRtt 2- 01 -057-65-27 151
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ORNL DOCUMENT REFERENCE LIBRARY, Y-
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.. II 1. G. M. Adamson 2. R. G. Aff
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4 . CRITICAL EXPERIMENTS ..........
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Removal of Xe13' from Molten Fluori
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ANP QUARTERLY PROGRESS REPORT main
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incident on crew shield sides and r
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1. CIRCULATING-FUEL AIRCRAFT REACTO
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clean reactor at a low power for a
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for more than 0.6 Mw in the sodium,
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i PERIOD ENDING DECEMBER 70,7954 Fi
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Analytical studies, layout work, an
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XENON- REMOVAL SYSTEM 4 BLEED CIRCU
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L . PERIOD ENDING DECEMBER 70, 7954
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the floor up to 3 ft below the bolt
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The pump has unusual ability to rem
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into operation with a Reynolds numb
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. . . . .- . Fig. 3.5. Heat Exchang
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n while connected to a small tank o
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Fig. 4.1. Second Reflector-Moderate
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