TY - RPRT
TI - Effect of fuel density on neutron multiplication factor
AB - From the nuclear criticality safety point of view, a case study has been carried out to investigate effect of uranium dioxide density on the neutron multiplication factor. The neutron multiplication factors k{sub eff}`s are predicted to increase as fuel density increases with fuel mass unchanged. In this case, the fuel volume decreases to increase its geometrical buckling B{sub g}{sup 2}. On the other hand, the neutron migration area M{sup 2} decrease more greatly so that the neutron leakage factor M{sup 2}B{sub g}{sup 2} decreases to result in the greater K{sub eff} calculated. As a conclusion, it is recommended that criticality safety of nuclear fuel with the same isotopic composition should be evaluated assuming the highest fuel density considered in the facility. This conclusion can be shown not to be influenced by difference of fuel materials or reflection conditions, and applicable not only for a single unit system but also for an interacting one. (author).
AU - Ogino, Teruhisa
AU - Naito, Yoshitaka [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment]
KW - 22 GENERAL STUDIES OF NUCLEAR REACTORS
KW - 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
KW - NUCLEAR FUELS
KW - MULTIPLICATION FACTORS
KW - DENSITY
KW - CRITICALITY
KW - REACTOR SAFETY
KW - URANIUM DIOXIDE
KW - NEUTRON REFLECTORS
KW - PLUTONIUM DIOXIDE
KW - CRITICAL MASS
KW - NEUTRON LEAKAGE
KW - URANIUM 235
KW - PLUTONIUM 239
KW - 220300
KW - 050700
KW - FUEL ELEMENTS
KW - FUELS PRODUCTION AND PROPERTIES
DO -
UR -
PB -
CY - Japan
PY - 1991
DA - 1991-10-01
LA - Japanese
J2 -
C1 - Japan Atomic Energy Research Inst., Tokyo (Japan)
C2 -
ER -