HEU-UAl4-347 90.2% Measured

HEU UAl4-347 90.2%

Calculated

LEU-U3Si 19.75%-347

Calculated

LEU-U3Si2 19.75%-347 Calculated

LEU-U9Mo 19.75%-347 Calculated

keff rod out

1.00475 ± 0.00006

1.00472 ± 0.00006

1.00478 ± 0.00006

1.00482 ± 0.00006

keff rod in

0.99715 ± 0.00006

0.99799 ± 0.00006

0.99807 ± 0.00006

0.99829 ± 0.00006

Clean core excess

ρ e x = ( k e f f 1 ) k e f f reactivity, (mk)

4.97

4.73

4.70

4.76

4.80

Control rod worth (mk)

ρ w = ( k e f f o u t k e f f i n ) ( k e f f o u t * k e f f i n )

7

7.59

6.71

6.69

6.51

Shut Down Margin (mk)

ρwex

2.03

2.86

2.01

1.93

1.71