RRFM 2009 Transactions - European Nuclear Society

Plate 8044 (2.1%Si )
Plate 8043 (2.1% Si)
IRIS-4
Plate 8054 (0% Si)
Plate 8053 (0% Si)
Fig. 2 : IRIS4 loading in the OSIRIS core
Peak Heat Flux (PHF) of the four plates are given in Table 2 for each cycle. At this step of
the IRIS4 experiment, those PHF values must be considered as first estimated results which
will be consolidated after spectrometry measurements and neutronic calculation. An average
burn-up at Maximal Flux Plane of ~38% and ~35% is estimated for the two outer plates
(8044 and 8053) and the two inner plates (8043 and 8054) of the IRIS4 experiment
respectively. The two most irradiated plates (8044 with Si and 8053 without Si) have seen a
maximal heat load above 285 W.cm -2 . All the four plates have been reinserted mid-February
for the 5 th cycle F233 since no pillowing or important swelling 1 occurred.
Peak Heat Flux 2 (W.cm -2 )
Cycle EFPD* Plate 8044 Plate 8043 Plate 8054 Plate 8053
F229 8 295 275 265 280
F230 14 290 275 270 285
F231 16 250 235 230 245
F232 18 230 220 220 230
Table 2: Maximum Flux Plane (MFP) irradiation conditions of IRIS4
(*Equivalent Full Power Day)
1 The admissible swelling limit is 250 µm. Above this value, it is not possible to reinsert the incriminate
plate.
2 These PHF are preliminary values based on the OSIRIS loading. Definitive results of PHF will be
available after neutronic calculations.
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