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A nuclear rocket engine has a cylindrical reactor (D=L=2m) composed of fully enriched UC(100%235U) with hydrogen propellant flow holes (hole volume fraction =0.3 ). The

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A nuclear rocket engine has a cylindrical reactor (D=L=2m) composed of fully enriched UC(100%235U) with hydrogen propellant flow holes (hole volume fraction =0.3 ). The engine fires for a total of 100min during a Mars mission and operates at 4000MW : a. What average neutron flux levels would you expect? b. What fractional fuel burnup would be expected during the mission? Note :f=577bUC=13,500kg/m3

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