All combustion systems are fitted with a safety control system, to detect abnormal operations and, where this impacts on safe operations, to take executive action; in the extreme this involves automatically tripping the plant.
The functional design requirements of such systems are outlined in national and international safety codes, all of which are familiar to RJM’s engineers. The application of these design requirements to an individual plant design is more complex and requires detailed plant design and operations knowledge coupled with the ability to identify potential hazardous situations which may not be covered by a necessarily generic safety code.
RJM can deploy tools such as HAZOP to evaluate these situations and can also draw upon its in-depth fuels knowledge to provide a full assessment.
Programmable safety systems designed in accordance with IEC 61508 require a Safety Integrity Level (SIL) assessment to be carried out. RJM utilises the Layers of Protection Analysis (LOPA) approach for this. Again, an accurate assessment of initiating actions that create a hazardous event, the probability of this occurring and the assessment of individual exposure demand a strong background in power plant design and operation, one of RJM’s key strengths.