Abstract
Brief presentation of the research lead at VTT on fission
products transport and chemistry was made, and focus was
made on the behaviour of FPs in the primary circuit
piping. Starting from the observation of a significant
fraction of gaseous iodine in the containment during some
Phébus-FP tests, hypotheses concerning reactions from
caesium iodide, which can modify the transport of iodine,
were presented. Focus was on {Cs-I-O-H} system and the
influence that may have molybdenum and boron.
Experimental works, performed at IRSN, on the study of
the chemical reactions on the gas stream and performed at
VTT, on chemical reactions on the surfaces of the pipe
walls were shown. The influence of the two elements,
acting as caesium consumers in both gaseous and condensed
phased, was demonstrated. Moreover, comparative study
between experimental results and calculations obtained
with SOPHAEROS, module of ASTEC code, was made for the
experiments done in gaseous phase. Role of possible {Cs,
I, O, H} kinetic reactions was pointed out.
Original language | English |
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Publication status | Published - 2015 |
Event | CLADS Decommissioning Workshop - International Collaboration Toward Advanced Decommissioning of Fukushima-Daiichi NPP - Ibaraki, Japan Duration: 9 Nov 2015 → 12 Nov 2015 |
Workshop
Workshop | CLADS Decommissioning Workshop - International Collaboration Toward Advanced Decommissioning of Fukushima-Daiichi NPP |
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Country/Territory | Japan |
City | Ibaraki |
Period | 9/11/15 → 12/11/15 |
Keywords
- fission products
- RCS
- iodine
- nuclear severe accident