Objectives and content
Accurate component life prediction is crucial to the safe, reliable and economic performance of all types of high temperature plant. It is particularly difficult when components are found to contain crack-like surface or embedded defects, since for these situations there are no well-established International or European Standards. Some guidelines or methodologies do exist within Germany, France and the UK but difficulties with them are the lack of commonality and very limited validation thus significantly limiting their application.
This proposal is aimed at addressing the above issues. The work will involve:
- validating and expanding the database of the existing high temperature defect assessment procedures by conducting tests on component type geometries and 'scoping' tests on standard laboratory type specimens, together with data from plant experience
- developing new methodologies for predicting the behaviour of high temperature components operating under steady and/or cyclic load conditions with a view to refining the present procedures
- unifying and refining existing procedures with a view to making recommendations for a Euro-Standard
- developing a knowledge-Based System for HIDA demonstration and applicability, and
- providing a Database for materials used in high temperature applications for fossil and nuclear power plant and for process and petrochemical plant. The materials include the pressure vessel piping materials 2.25Cr1Mo (550øC), AISI 316 Stainless Steel (550øC), and ASTM Grade 91 (600øC), a 1CrMoV forged rotor material (530øC) and a cast 1CrMoV casing material (530øC).
Funding SchemeCSC - Cost-sharing contracts
91191 Gif Sur Yvette
77818 Moret Sur Loing
114 28 Stockholm
2740-120 Porto Salvo
7522 LR Enschede
100 29 Stockholm