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HYDROGEN HAZARD PASSIVE AUTOCATALYTIC RECOMBINERS STATE OF THE ART

Obiettivo

This thematic network consists of performing the state-of-the-art of passive autocatalytic recombiners, which represent the best solution in mitigating hydrogen hazard.

The main purposes of this work are:
1) to expand knowledge about PARs among the main users;
2) to built up a large synthesis on such devices;
3) to assess PAR applications in different fields such as small fission reactors, nuclear and conventional fields. This work will be carried out by an EU work group including the main players in this area like recombiner manufacturers, safety authorities, research experts, nuclear power plant designers and utilities. Five reports will be written by the co-ordinator and approved by partners (preliminary report, intermediary report, yearly progress report, final public report, final report for partners).

Environmental safety of nuclear power plants may be severely affected by uncontrolled hydrogenoxygen reactions in-case of severe accidents. The introduction of passive autocatalytic recombiners is an interestincr method to remove together hydrogen and oxygen. This thematic network consists of performing the state of the art in passive autocatalytic recombiners, which seem nowadays to represent the best solution in mitigating the hydrogen hazard. The main purposes of the work are:

- to expand knowledge about passive autocatalytic recombiners among the main users,- to build up a large synthesis on such devices in order to create an aid tool for users,- to assess PAR applications in different fields (fission or fusion reactors, chemical industry).

This. work will be carried out by a EU workgroup including the main actors in this area like recombiner manufacturers, safety authorities, research experts, nuclear power plant designers and utilities. Three reports will be written during the two years project i.e. mid-term assessment report, public final report, and final report for partners.

During the last ten years, several safety authorities have been acknowledged recombiner to be an efficient solution to reduce hydrogen hazard, and many papers have been published concerning PARs, but no synthesis has been yet performed. So this thematic network aims at answering five purposes:

- to build a large synthesis about the existing PARs in order to create an aid tool for users,
- to compare qualification tests with severe accident conditions and licensing, procedures,
- to estimate hydrogen explosion hazard induced by passive autocatalytic recombiners,
- to evaluate the principle numerical model needs for PAR designers and utilities,
- to assess possible PAR applications in order to develop new markets for manufacturers.
This thematic network progresses in four sections. The first one makes up a complete presentation of each type of passive autocatalytic recombiners according to three topics that are description, implementation and maintenance. The second one proposes an exhaustive assessment of the current qualification processes. The third one attempts to determine the main numerical model needs to approach recombiner behaviour during, accidental situations. The last one explores the potential new markets for PARs like small nuclear reactors, nuclear waste storage, nuclear fuel transport in wet conditions, fusion reactors, and conventional applications like chemical industry or hydrogen storage.

The present thematic network is further development of the hydrogen hazard global study, which was done during, the third Framework Programme FP-3 (1990-1994) by Pr. FINESCHI's workgroup. The expected results of this thematic network are:

- to perform a synthesis on PARs, which may become an aid tool for nuclear reactor utilities,
- to define qualification tests which would be necessary, for being in accordance with SAC,
- to determine the main numerical model needs in order to improve numerical codes,
- to underline on attractive industrial PAR applications in nuclear and conventional fields.

Campo scientifico (EuroSciVoc)

CORDIS classifica i progetti con EuroSciVoc, una tassonomia multilingue dei campi scientifici, attraverso un processo semi-automatico basato su tecniche NLP. Cfr.: Il Vocabolario Scientifico Europeo.

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Coordinatore

TECHNICATOME SA
Contributo UE
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Indirizzo
Avenue Jean-René Guillibert Gautier de la Lauliere
13791 AIX EN PROVENCE
Francia

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