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Fig. 7.17: Details of Experimental Studies on Hydrogen Mitigation: (a) Arrangement of Catalyst Coupon within the PAR
Chamber, (b) Reaction Rate Data from Experiments

Fig. 7.18: Temperature Transients in the Annular Gas Region; z=0 represents centre of the channel; Negative values of
‘z’ are towards the panel end

7.6.5 Water and Steam Interaction Facility (WASIF) 7.6.6 Molten Corium Concrete Interaction (MCCI)
Experimental Studies
An experimental facility has been setup within the
high bay of SRI engineering hall in collaboration with Effect of MCCI phenomena needs to be investigated
BARC to investigate various forms of Direct Contact for the Indian specific concrete used in NPPs. Experiment
Condensation (DCC) phenomena. The operating was conducted at IIT Bombay in collaboration with
procedure for conducting the experiments has been fine- BARC and NPCIL with simulant material where the
tuned. Several Condensation Induced Water Hammer melt was poured in the concrete cavity at ~ 2000 °C.
(CIWH) experiments for the case when water is injected
at various flow rates into stagnant steam within the The concrete ablation phenomenon was observed
test pipe have been completed. The steam pressure in and studied. Fig. 7.19 (a) and (b) show the cut view of
the test pipe was varied in the range of 1 to 4 bar. The the concrete block after experiment and the variation of
instrumentation system was able to capture pressure temperature. The data so generated will be used for the
pulses of different magnitude in these cases. validation of the computer models.

88 AERB Annual Report 2019