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MAIB reports on Queen Mary 2 explosion

Occured after a failure of a capacitor- part of the diesel-electric propulsion system The UK Marine Accident Investigation Branch (MAIB) has released the result of its investigations into a failure of a capacitor, part of the diesel-electric propulsion system of the cruise ship 'Queen Mary 2'.The MAIB feels that there are lessons that the industry should learn from this incident, which resulted in an explosion onboard,so has asked for our help in promulgating the information.Key issues:Explosion in the machinery space was triggered by the failure of a large capacitor within a 11kV passive harmonic filter The protection system for the harmonic filter did not work Vessel blacked out and was without steering or propulsion for 30 minutes. There were 3823 people on board at the time of the accident The investigation identified that there is a need to improve the awareness of the potential risks of high voltage harmonic distortion and arc flash. You can view the Report by clicking here.Source: MAIB

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Queen Mary 2 drifted after explosion

Explosion in a main electrical switchboard room An explosion in a main electrical switchboard room caused the Queen Mary 2 cruise liner to lose power, according to a marine accident report.The Southampton-based liner drifted in open sea for about an hour following the blast in September 2010.The Marine Accident Investigation Branch (MAIB) report said it was triggered by deterioration in the capacitors, which store energy.No-one was injured in the incident which happened near Barcelona.The report said: "A current imbalance detection system, which was the only means to warn against capacitor deterioration, was found to be inoperable, and it was evident that it had not worked for several years."It said it was fortunate the 150,000-tonne vessel was clear of navigational hazards at the time.Following the explosion, the emergency generator started automatically. The main generators were restarted and the ship was able to resume sailing.The MAIB said that since the incident action had been taken by Cunard's parent company, Carnival.It also made recommendations to Lloyd's Register and the Maritime and Coastguard Agency.Source: BBC News

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