Page 121 - Neutrons for Sciences and Society

Chapter 5: The construction of the reactor and the scientific groups
Characteristics of the ILL reactor
Characteristics
Nominal Power
57 MW
Coolant
Heavy water
Reflector
Heavy water
Flux of thermal neutrons unperturbed in the reflector at 57 MW
1.5x1015 n/cm2/s
Perturbed Flux at the end of a tangential beam tube
1015 n/cm2/s
Flux in the fuel element
2.2 x 1014 n/cm2/s
Mean Flux in the heavy water
1.8 x 1014 n/cm2/s
Fast neutron flux (0.8 MeV) at the fuel rod
3.5 x 1014 n/cm2/s
Fast neutron flux (0.8 MeV) on the control rod
2.7 x 1014 n/cm2/s
Fast neutron flux (0.8 MeV) at the end of the beam tubes
1.5 x 1012 n/cm2/s
Reactivity
Uranium consumption
10.5 %
Poisoning by xenon and samarium
5%
Unconsumed Boron at the end of a cycle
0.5 %
Beam tubes
5%
Effect of temperature
0.6 %
Reserve at the end of cycle
1.5 %
Safety rods withdrawn
0.2 %
Control rod
15.5 %
Initial poison consumable
5.1 %
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