Etude et impact du bruit de fond corrélé pour la mesure de l'angle ...

66 3. The Double Chooz experiment
]
-1
Fission rates [s
90
×10
80
70
60
50
40
30
18
235
U
238
U
239
Pu
241
Pu
20
tel-00821629, version 1 - 11 May 2013
10
0
0 50 100 150 200 250 300 350 400
Days
Figure 3.18: Fission rates as function of the day since start of data taking,
as obtained by the simulation of the reactor evolution. The decrease of the
U isotopes and the increase of the Pu isotopes reflect the evolution of the
reactor fuel, which burn U isotopes creating Pu isotopes.
Error (%)
3.5
3
2.5
2
1.5
1
0.5
Water Density
Control rod
Code
Statistical Error
Initial Burnup
Fuel Temperature
0
50 100 150 200 250 300 350
Days
Figure 3.19: Breakdown of simulation uncertainties on the 235 U fission rate,
as obtained by varying di↵erent input parameters of the simulation.