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Grant
Agency: Cordis | Branch: FP7 | Program: CP-FP | Phase: Fission-2009-2.1.1 | Award Amount: 5.21M | Year: 2010

The overall objective of the project is to assess, optimise and develop the use of advanced tools for the structural integrity assessment of reactor coolant pressure boundary components (RCPB) relevant to ageing and life time management and to integrate the knowledge created in the project into mainstream nuclear industry assessment codes. Realistic failure models for some of the key components will be identified within the project based on the operators experience supported by an efficient knowledge management database system. The range of assessment tools considered will include those for assessment of component failure by advanced fracture mechanics analyses validated on small and large scale experiments, quantification of weld residual stresses by numerical analysis and by measurements, stress corrosion crack initiation/growth effects and assessment of RCPB components (excluding the reactor pressure vessel) under dynamic and seismic loading. Based on theoretical and experimental results, performance assessment and further development of simplified engineering assessment methods (EAM) will be carried out considering both deterministic and probabilistic approaches. Integrity assessment case studies and large scale demonstration experiments will be performed on Mock-ups of safety-relevant components. These will include a repair weld in an aged butt-welded austenitic pipe, a dissimilar narrow gap TIG weld (following the EPR design) and a cladded ferritic pipe. Moreover experiments on specimens and feature test pieces will be carried out to support the large scale Mock-up analyses. The end product of the project (STYLE TOOLS) will comprise best practice guidelines on the use of advanced tools, on improvement and qualification of EAM as a part of European Leak-before-break (LBB) procedures and on life time management of the integrity of RCPB components in European nuclear power plants. The project will interact with the European Network of Excellence NULIFE.


Grant
Agency: Cordis | Branch: FP7 | Program: JTI-CP-FCH | Phase: SP1-JTI-FCH.2013.5.6 | Award Amount: 4.05M | Year: 2014

Hydrogen is expected to be a highly valuable energy carrier for the 21st century as it should participate in answering main societal and economical concerns. However, in order to enable its extensive use as an energy vector, it is of primary importance to ensure its societal acceptance and thus its safety in use. To this aim, hydrogen storage and transportation must be secured. In particular today, the knowledge on composite overwrapped pressure vessels (COPV) behaviour when submitted to mechanical impacts is limited and existing standards are not well-appropriate to composite materials. The main objective of HYPACTOR is thus to provide recommendations for Regulation Codes and Standards (RCS) regarding the qualification of new designs of COPV and the procedures for periodic inspection in service of COPV subjected to mechanical impacts. To this aim, experimental work will be combined with feedback from experience in order to: - Understand and characterize the relationship between the impact, the damage and the loss of performance of COPV at short term and after further pressure loads in service; - Develop models to predict at least short term residual performance of the impacted COPV; - Assess relevant (non-destructive) inspection procedures and define pass-fail criteria for COPV in service subjected to mechanical impacts. Different applications will be considered: stationary application, transportable cylinders, bundles and tube trailers. The HYPACTOR project brings together partners with complementary expertise: experts in testing processes for compressed gaseous hydrogen (CGH2) storage in full composite vessels (CEA, WRUT), a gas company operating CGH2 technologies (AIR LIQUIDE), a pressure vessel supplier (HEXAGON), experts in characterization, particularly non-destructive testing (ISA, WRUT) and experts in modelling (NTNU), leading actors in international RCS development (HEX, AL, ISA, CEA), and an expert in European R&D collaborative project management (ALMA).

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