Offshore Risk Assessment Vol. 2 by Jan-Erik Vinnem & Willy Røed

Author:Jan-Erik Vinnem & Willy Røed
Language: eng
Format: epub
ISBN: 9781447174486
Publisher: Springer London

Operator intervention (Man SD)

Number of hot work hours (Hot Work)

Maximum likely overpressure (Expl ovpr)

Fire detection (Fire Det)

Manual combatment of small fire (Man fifi)

ESD operation (ESDfail)

Fire water unavailability (Fwfail)

Escalation by neighbouring equipment (Eqm esc)

Time to structural collapse (Str colps).

Reduced number of hot work hours implies reduced ignition probability and reduced maximum explosion over-pressure implies reduced probability of strong explosions. It should be noted that the blowdown system was also part of the study, but was eliminated from the graphical presentation.

Figure 19.1 presents the overall results from the sensitivity studies conducted. The blow-down sensitivity showed no effect for risk to personnel, and an insignificant effect, less than 2% reduction of the frequency for total loss of platform as the highest contribution.

Fig. 19.1Overall sensitivity results

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