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[IMC FS 2016]
28-Oct-16, Slide 16
Vacuum unit
Case study 1 - Valve specification
SIF action 2oo2 valves closed “Tight shut-off required” due to hot
gasses returning to scrubber
SRS decision, temperature gradient over distance meant leakage
permitted. TSO is a design requirement not a safety requirement.
Effect: SIL achievable, testing requirements, maintenance costs
Scrubber
Heater
Incinerator