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3. A reactor has the power history shown below. Spent fuel typically resides in a spent fuel

pool for at least 5 years before moving to dry cask storage. Determine the decay heat

generated 5 years after shutdown if the maximum thermal power is 3400 MW.

Pmax

0.80Pmax

0

t₁

7

t2

9

Time (months)

t3

16

t4

18

Fig: 1