ONCE THROUGH Cycle, calculote a) Spesific burnup. rcent dontribution op Pu to en
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Question
ONCE THROUGH Cycle, calculote a) Spesific burnup. rcent dontribution op Pu to energy production Produce.ka fresh: c) Amount of natura. U re u red d) Amount U pue'. op Huw CHigh- Level waste) obtained per 4g u in presh ed DATA S : Fresn Fuel Spent Fuet 2600 kg Thermai, efficiency-o.33 capocity tactor 0.87 27270 kou- o.83 wlo Pissile 246 ig Pu7o wlo pissile) (3.3 wlo 235) Residence time 36 months Au the moss plows are per "12 months Astoeody state . / each 2 months, one third cu3) Op the core is repiaced by fresh fuel andd each, load op fuel spencis 36 months n the reactor pissionOther produc+s7 Actinicles CaPture-to-fission roto for u235=0.16g Enrichment tou Natural assay=0.3 w/o. w/o. assay 0.71 IOterest rate-a per yearExplanation / Answer
In nuclear power technology ,burnup (also known as fuel utilization ) is a measure of how much energy is extracted from a primary nuclear fuel source .
Data given
1000 MW electric = 3000 MW thermal
Operate at full power for 36 month=3*365 days
27 270 kg U=27.27 metric tonnes
Burnup of fuel is (3000 MW*3*365 d)/27.27 metric tonnes = 1,20,462 MWd/t
B) Plutonium is classified according to the percentage of the contaminant plutonium 240 that it contain
supergrade 2-3%
weapons grade less than 7%
Fuel grade 7-18%
Reactor grade 18% or more .
from above tabel 246 kg pu present in 26010 kg of U
=1% plutonium present ,so it comes under supergrade .
C)Uranium235 is only 0.7% of the mass of natural uranium
143 kg *0.7/100 = 1kg of uranium 235
So 143 kg of natural uranium is required to produce 1kg uranium 235
D)976 kg fission productts(HLW) IS 3.57 % of Fresh fuel
1 kg of Fresh fuel produces 35 grams of HIGH LEVEL WASTE .
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