PRELIMINARY FUEL BURNUP STUDY OF THE 255 MWE ASGR
Technical Report
·
OSTI ID:4136863
Studies were made to determine the effects of fuel burnup on reactivity, power distribution, and isotopic fuel composition. Starting with an initial value of K/sub eff/ = 1.139, hot, clean, the core will go subcritical at an average core exposure of 700 Mwd/t. Equilibrium Xe and Sm account for a sharp initial decrease in reactivity of DELTA k/sub eff/ = -0.031, and the remainder is due to fuel burnup. As b~p p~p~ clean, the core will go subcritical at an average core exposure of 700 Mwd/t. Equilibrium Xe and Sm account for a sharp initial decrease in reactivity of DELTA k/sub eff/ =-0.031, and the remainder is due to fuel burnup. As burnup proceeds the ratio of the radial peak to average power decreases from an initial value of 1.46 to a value of 1.24 at 7,000 Mwd/t. At 7,000 Mwd/t 91.4 kg of U/sup 235/ out of an initial 397.0 kg were consumed in fission and 23.8 kg were converted to U/sup 236/. A total of 84.8 kg of Pu was produced from U/sup 238/, of which 34.3 kg were consumed in fission and 50.5 kg remain in the fuel. (W.L.H.)
- Research Organization:
- Atomics International. Div. of North American Aviation, Inc., Canoga Park, Calif.
- NSA Number:
- NSA-14-016452
- OSTI ID:
- 4136863
- Report Number(s):
- NAA-SR-Memo-4455
- Country of Publication:
- United States
- Language:
- English
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