( ) ( ) = 0 − ( ) + ( ) = 0 ( ) ( ) ̃ ( ) = ∑ ( ) ( ) =1 ( ) = ( ) 1 = ∫ [ ̃ − ∑ ( ) ( ) +] 2 =1 ̅ ( ) ( ) = ( ) − ̅ ∫ ( ) = 0 ̅ Copyright © Advanced Nuclear Technology International Europe AB, ANT International, 2019.