Thierry Albiol

• Institut de Radioprotection et de Sûreté Nucléaire (IRSN)

The Fukushima-Daiichi accidents in 2011 underlined the importance of severe accident management (SAM), including external events, in nuclear power plants (NPP) and the need of implementing efficient mitigation strategies. To this end, the Euratom work programmes for 2012 and 2013 was focused on nuclear safety, in particular on the management of a p...

The PASSAM (Passive and Active Systems on Severe Accident source term Mitigation) project was launched in the frame of the 7th framework programme of the European Commission. Coordinated by IRSN, this four year project (2013–2016) involved nine partners from six countries: IRSN, EDF and university of Lorraine (France); CIEMAT and CSIC (Spain); PSI...

This paper deals with near past, ongoing, and planned R&D works on fission products (FPs) behavior in reactor cooling system (RCS), containment building and in filtered containment venting systems (FCVS) for severe accident (SA) conditions. All the researches are collaborative works; the overall objective is to develop confident models to be implem...

An experimental screening of silver-exchanged zeolites towards the trapping of methyl iodide was carried out with the general aim of limiting as much as possible the iodine release in case of severe nuclear accident. For the first time, a systematic study was implemented in order to better understand the effects of some important parameters such as...

An international Iodine workshop co-organized by the French “Institut de Radioprotection et de Sûreté Nucléaire”, the Nuclear Energy Agency of the OECD, the Technical Area 2 “SARNET” of NUGENIA and the European Commission through the Joint Research Centre (Petten) was held in Marseille (France) from March 30 to April 1, 2015. The scope and objecti...

This paper deals with near past, ongoing and planned R&D works on fission products (FPs) behaviour in Reactor Cooling System (RCS), containment building and in Filtered Containment Venting Systems (FCVS) for severe accident (SA) conditions. For the last topic, in link with the Fukushima post-accident management and possible improvement of mitigatio...

The STEM (Source Term Evaluation and Mitigation) OECD project operated by IRSN, has been launched mid-2011 in order to improve, in the event of a severe accident (SA) on a nuclear power plant, the evaluation of Source Term (ST) and to reduce uncertainties on specific phenomena dealing with the chemistry of two major fission products: iodine and rut...

The phase relationship between ZrO2 and PuO2 was examined in the ZrO2-rich region by high temperature X-ray diffractometry. At 1273 K, for the studied range of compositions, the samples exhibited two stable phases: monoclinic and cubic. At higher temperatures, several configurations were observed depending on the temperature and the composition. It...

Detailed codes (also called mechanistic codes): they are characterised by best-estimate phenomenological models, consistent with the state of the art, to enable as far as possible an accurate simulation of the behaviour of a NPP in case of SA. In order to better illustrate the differences with the approach of integral codes, in most cases, a numeri...

In order to optimise the use of the available means and to constitute sustainable research groups in the European Union, the Severe Accident Research NETwork of Excellence (SARNET) has gathered, between 2004 and 2008, 51 organizations representing most of the actors involved in severe accident (SA) research in Europe plus Canada. This project was c...

Fifty-one organisations network in SARNET (Severe Accident Research NETwork of Excellence) their research capacities in order to resolve the most important pending issues for enhancing, with regard to Severe Accidents (SA), the safety of existing and future Nuclear Power Plants (NPPs). This project, co-funded by the European Commission (EC) under t...

The overall aim of the SARNET (Severe Accident Research NETwork), in the EU 6th Framework programme was to integrate in a sustainable manner the research capabilities of fifty-one European organisations from eighteen member states of the European Union (EU) plus the Joint Research Centres, with one Canadian company, to resolve important remaining u...

Summary Fifty-one organizations cooperate within SARNET (Severe Accident Research NETwork of Excellence) joining their capacities of research in order to resolve the most important pending issues for enhancing, in regard to Severe Accidents (SA), the safety of existing and future Nuclear Power Plants (NPPs). This project, co-funded by the European...

Fifty-one organizations from Europe and Canada cooperated within SARNET (Severe Accident Research NETwork of Excellence) joining their capacities of research in order to resolve the most important pending issues for enhancing, in regard to Severe Accidents (SA), the safety of existing and future Nuclear Power Plants (NPPs). This project, co-funded...

51 organizations network in SARNET (S__-evere A__-ccident R__-esearch ___-work of Excellence) their capacities of research in order to resolve the most important remaining uncertainties for enhancing, in regard of Severe Accidents (SA), the safety of existing and future Nuclear Power Plants (NPPs). This project, co-funded by the European Commission...

Various inert matrices – oxide, nitride and metallic – were irradiated in the French Phénix reactor in order to study their behaviour under a fast neutron fluence (E>0.1 MeV). This paper summarises the material selection criteria and the irradiation conditions of the MATrices for INcineration of Actinides (MATINA) 1 experiment. Emphasis is given on...

Dans l'hypothèse d'un accident sévère sur un réacteur nucléaire à eau pressurisée, les aérosols émis par le coeur du réacteur seront entraînés par un écoulement gazeux constitué de vapeur d'eau et d'incondensables. Dans le circuit primaire et plus précisément au niveau du générateur de vapeur, ces aérosols se déposeront sur la paroi du faisceau tub...

In the hypothesis of a severe accident on a pressurized water nuclear reactor, the aerosols created and carried by a gas flow consist of steam and incondensable gases which can settle by different mechanisms on the walls of the primary circuit. In particular, in the tubular bundle of steam generator, on contact with the wall cooled by the water flo...

In the hypothesis of a severe accident on a pressurized water nuclear reactor, the aerosols created and carried by a gas flow consist of steam and incondensable gases which can settle by different mechanisms on the walls of the primary circuit. In particular, in the tubular bundle of steam generator, on contact with the wall cooled by the water flo...

Dans un système matériel ouvert dont on connaǐt la distribution des temps de séjour, il est possible, en utilisant le modèle de micromélange de Zwietering, de préciser le résultat d'une interaction physique linéaire fluide-paroi pour la phase fluide mais aussi pour des particules transportées par le fluide. Cette méthodologie est appliquée aux dépǒ...

In an open material system where the residence time distribution of a fluid is known, it is possible, using micromixing Zwietering' model to predict the results of linear interaction between the fluid and the wall of system but also for the aerosol particles transported by the fluid flow. This methodology is applied for aerosol deposition by thermo...