DNV DNV-RU-SHIPS PART 4 CHAPTER 3 PDF

The risk analysis shall address:

— failures or malfunction of any system or component involved in the gas operation of the engine

— gas leakages downstream of the gas valve unit

— the safety of the engine in case of emergency shutdown or blackout, when running on gas

— inter-actions between the gas fuel system and the engine

— hazard potential of injury from a possible explosion.

Guidance note:

With regard to the scope of the risk analysis it should be noted that failures in systems external to the engine, such as fuel storage or fuel gas supply systems, may require action from the engine control and monitoring system in the event of an alarm or fault condition. Therefore, failures in these external systems may, from the vessel perspective, require additional safety actions from those required by this risk assessment focussing on the engine only.