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Essential oil production, an innovative phytomanagement approach to value plant biomass produced on Metal Trace -aged contaminated soils: a field experiment.
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Zone negligible extent: example of specific detailed risk assessment for low pressure equipment in a hydrogen refuelling station
No full textInternational audienceThe MultHyFuel project aims to develop evidence-based guidelines for the safe implementation ofHydrogen Refueling Stations (HRS) in a multi-fuel context. As a part of the generation of good practiceguidelines for HRS, Hazardous Area Classification (HAC) methodologies were analyzed and applied tocase studies representing example configurations of HRS. It has been anticipated that Negligible Extent(NE) classifications might be applicable for sections of the HRS, for instance, a hydrogen generator. ANE zone requires that an ignition of a flammable cloud would result in negligible consequences. Inaddition, depending on the pressure of the system, IEC 60079-10-1:2020 establishes specificrequirements in order to classify the hazardous area as being of NE. One such requirement is that a zoneof NE shall not be applied for releases from flammable gas systems at pressures above 2000 kPag (20barg) unless a specific detailed risk assessment is documented. However, there is no definition withinthe standard as to the requirements of the specific detailed risk assessment. In this work, an example fora specific detailed risk assessment for the NE classification is presented:• Firstly, the requirements of cloud volume, dilution and background concentration for a zoneof NE classification from IEC 60079-10-1:2020 are analyzed for hydrogen releases fromequipment placed in a mechanically ventilated enclosure.• Secondly, the consequences arising from the ignition of the localized cloud are estimatedand compared to acceptable harm criteria, in order to assess if negligible consequences areobtained from the scenario.• In addition, a specific qualitative risk assessment for the ignition of the cloud in theenclosure was considered, incorporating the estimated consequences and analyzing theavailable safeguards in the example system.Recommendations for the specific detailed risk assessment are proposed for this scenario with theintention to support improved definition of the requirement in future revisions of IEC 60079-10-1
Detailed Assessment of Dispersion for High-Pressure H2 in Multifuel Environment
No full textInternational audienceThe MultHyFuel project notably aims to produce the data missing for usable risk analysis and mitigationactivity for Hydrogen Refuelling Stations (HRS) in a multi-fuel context.In this framework, realistic releases of hydrogen that could occur in representative multi-fuel forecourtswere studied. These releases can occur inside or outside fuel dispensers and they can interact with acomplex environment notably made of parked cars and trucks. This paper is focused on the most criticalscenarios that were addressed by a sub-group through the use of Computational Fluid Dynamics (CFD)modelling. Once the corresponding source terms for hydrogen releases were known, two stages arefollowed: Model Validation – to evaluate the CFD models selected by the task partners and to evaluatetheir performance through comparison to experimental data. Realistic Release Modelling – to perform demonstration simulations of a range of criticalscenarios.The CFD models selected for the Model Validation have been tested against measured data for a set ofexperiments involving hydrogen releases. Each experiment accounts for physical features that areencountered in the realistic cases. The selected experiments include an under-expanded hydrogen jetdischarging into the open atmosphere with no obstacles or through an array of obstacles. Additionally,a very different set-up was studied with buoyancy-driven releases inside a naturally ventilated enclosure.The results of the Model Validation exercise show that the models produce acceptable solutions whencompared to measured data and give confidence in the ability of the models, and the modellers, tocapture the behaviour of the realistic releases adequately.The Realistic Release Modelling phase will provide estimation of the flammable gas cloud volume fora set of critical scenarios and will be described at the second stage
Development of post-mining multi-hazard assessment methodology
No full textInternational audienceMining, natural and technological hazards can occur in a former mining site. Themulti-hazard analysis becomes critical. This paper aims to establish the methodological basis forassessing the interactions between the main hazards identified in abandoned mines. The interactionsbetween 57 hazards are analysed based on: theoretical aspects, feedback analysis and expert opinions.Interaction matrices and loops are used, helping to study the interactions between hazards
Forest fire plumes in the Paris region (France) during summer 2022, the spoor of a schorching summer
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Expertise collective : synthèse et conclusions relatives à l’expertise en vue de la fixation de valeurs limites d’exposition à des agents chimiques en milieu professionnel portant sur l’évaluation des indicateurs d’exposition et des recommandations de valeurs limites biologiques et de valeurs biologiques de référence pour le diméthylformamide (DMF) CAS n°68-12-2
No full textCitation suggérée : Anses. (2022). Expertise collective : Synthèse et conclusions relatives à l’expertise en vue de la fixation de valeurs limites d’exposition à des agents chimiques en milieu professionnel portant sur l’évaluation des indicateurs d’exposition et des recommandations de valeurs limites biologiques et de valeurs biologiques de référence pour le diméthylformamide (DMF) CAS n°68-12-2). (saisine 2021-MPEX-0138). Maisons-Alfort : Anses, 65 p.Dans le cadre du programme de recherche européen HBM4EU regroupant une trentaine de pays, des valeurs guides pour la surveillance biologique (ou Human Biomonitoring Guidance Values (HBM-GVs)), sont recommandées pour la population générale et les travailleurs. Ces valeurs sont proposées pour des substances d’intérêt identifiées comme prioritaires. Le diméthylformamide (DMF) a fait l’objet de propositions de valeurs guides au sein du programme HBM4EU (cf. HBM4EU : Deliverable Report D5.9 - 3rd substance specific derivation of EU-wide health-based guidance values).La méthodologie appliquée dans le cadre du projet HBM4EU (Apel et al., 2020) pour l’identification des indicateurs biologiques d’exposition (IBE) d’intérêt et la proposition de valeurs biologiques pour les travailleurs est en partie fondée sur la méthodologie de l’Anses (Anses, 2017).Dans le cadre du protocole d’accord relatif à la mise en œuvre du programme de travail d'expertise scientifique en matière de valeurs limites atmosphériques et biologiques pour les expositions professionnelles établi en juillet 2018 entre l’Anses et la Direction générale du travail (DGT), l’Anses a été saisie afin de recommander des valeurs biologiques pour le DMF, ceci afin de mutualiser les ressources d’expertise engagées. Le présent document est établi pour répondre à cette saisine, sur la base de l’évaluation précédemment réalisée par des agents de l’Anses dans le cadre du programme de recherche HBM4EU pour la recommandation de valeurs biologiques pour le DMF en milieu de travail.La France dispose pour le DMF d’une valeur limite d’exposition professionnelle (VLEP) contraignante sur 8 heures (VLEP-8h) de 15 mg.m -3 (5 ppm) et d’une valeur limite court terme contraignante sur 15 minutes (ou VLCT-15min) de 30 mg.m -3 (10 ppm)
CO9.2 - Impact de l'exposition combinée aux multiples polluants atmosphériques sur le risque de cancer du sein
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Predicting accidental release of engineered nanomaterials to the environment
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Living Labs and other participatory approaches applied to research on multiple environnemental exposures and chronic risks
No full textInternational audienceThe objectives of environmental health research are diverse (e.g.: identifying situations at potential risk, estimating exposures and effects, testing the effectiveness of preventive actions) and related methods are diverse as well. Opportunities for greater implication of the civil society and related challenges differ at each step of research activities. These aspects need to be better known and shared collectively
ReadEDTest: A tool to assess the readiness of in vitro test methods under development for identifying endocrine disruptors
No full textInternational audienceGrowing evidence shows that endocrine disruptors (EDs), known to affect the reproductive system, may also disturb other hormone-regulated functions leading to cancers, neurodevelopmental defects, metabolic and immune diseases. To reduce exposure to EDs and limit their health effects, development of screening and mechanism-based assays to identify EDs is encouraged. Nevertheless, the crucial validation step of test methods by regulatory bodies is a time- and resource-consuming process. One of the main raisons of this long duration process is that method developers, mainly researchers, are not fully aware of the regulatory needs to validate a test. We propose an online self-assessment questionnaire (SAQ) called ReadEDTest easy to be used by all researchers. The aim of ReadEDTest is to speed up the validation process by assessing readiness criteria of in vitro and fish embryo ED test methods under development. The SAQ is divided into 7 sections and 13 sub-sections containing essential information requested by the validating bodies. The readiness of the tests can be assessed by specific score limits for each sub-section. Results are displayed via a graphical representation to help identification of the sub-sections having sufficient or insufficient information. The relevance of the proposed innovative tool was supported using two test methods already validated by the OECD and four under development test methods