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Nakamura, T.*; Nakano, M.*; Hiraoka, T.*
PNC TJ250 71-33T, 28 Pages, 1971/03
Pulsed neutron experiments have been performed on FCA V-1, the physics mockup core for the JOYO. Neutron decay curves have been measured at several different re-activities from the delayed critical down to -6 and the reactivity pindoller unit are determined for each decay curve. Both 's and 'ps show no dependence on detector positions or energy responses in the measured reactivity range (down to -2). and p hold good linear relation down to -6c is determined as 0.341 0.031x105 sec-1. c calculated by SNKPARAM with JAERI-FAST set is about 13%larger than the experimental value.