Risk-based asset management in heat recovery steam generators

A risk based inspection and asset management process has been implemented on a number of HRSGs for a client in Australasia. This process has been undertaken in a phased approach consisting of data gathering on site, detailed risk assessment of all critical items of static plant, risk calculation and implementation of a risk based inspection plan based upon the results of the prior aspects of the assessment. The project has been streamlined through the use of dedicated risk based asset management software, RMS, developed specifically for the tasks described. Following the programme of work major inspections have been undertaken, the results of which have been uploaded to the program to allow a subsequent detailed review of the new plant profile and hence risk reduction. This not only allows a clear report on progress to senior management, but ensures that the process is continually maintained and future maintenance is most efficiently deployed to ensure optimum plant efficiency. Furthermore the rigorous nature of the process and the traceability which it enforces is being used to apply for extension of mandatory inspection of pressure vessels, where appropriate, allowing longer run times for the plant such that major shutdowns can be aligned with the requirements of the gas turbine overhauls.