Experimental data in DCA (15) Micro-parameters at 25.0 cm pitch lattice

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Micro-parameters have been measured in plutonium fuel loaded in 25.0 cm pitch lattice. The fuels used for the measurements were 0.54 w/o PuO $_{2}$ (standard grade)-UO $_{2}$ [5SPu] and 0.87 w/o PuO $_{2}$ (reactor grade)-UO $_{2}$ [8RPu]. The "coolants" used in the experiment on 5S Pu fuel lattice were H $_{2}$ O [0% void], mixture of H $_{2}$ O, D $_{2}$ O and H3BO $_{4}$ [30% void], and Air [100% void]. In the case 8R Pu fuel, H $_{2}$ O and Air were used as the coolants. The measurements were also done on the lattice of 0% void fraction with 3.9 $^{10}$ B ppm in D $_{2}$ O moderator loaded with 5S Pu fuel to investigate the effect of $^{10}$ B in the moderator. The micro-parameters such as $^{28}$ , $^{25}$ , $^{49}$ , $^{28}$ and $^{49}$ $_{25}$ were obtained by the foil activation method in using plutonium-foils, enriched-uranium-foils, natural uranium foils and depleted uranium foils. The micro-parameters measured in the DCA's lattices are shown in the following table.

Language	:	Japanese
Report No.	:	PNC TN941 79-195
Pages	:	66 Pages
Publication Year/Month	:	1979/10
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PDF	:	PNC-TN941-79-195.pdf:2.06MB
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Keywords	:	no keyword
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Registration No. : GJ0919790198
JAEA Abstracts No. :

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