The Malta Independent 14 November 2019, Thursday

Shorter timeframes for return of Delimara steam turbine

Malta Independent Monday, 5 November 2012, 12:17 Last update: about 7 years ago

Following Enemalta’s insistence, which was accepted by the contractor, to treat the repairs to the steam turbine with utmost urgency and the conclusions of thorough testing by the manufacturer, Enemalta can now provide an updated timeframe for the return of the steam turbine to Malta which was originally estimated to be between three to six months.

So far the steam turbine manufacturer has:

Carried out an inspection of all parts including Non Destructive Testing.

Sent the broken rotor blade to an independent specialist laboratory in the UK for further examination and detailed fracture analysis.

Repaired the damaged rotor and the stator. These have been shipped and are expected to arrive at the Delimara Power Station this Wednesday.

Carried out repair works on the steam chest inlet nozzle, which works are also very advanced and delivery to the Delimara Power Station is expected next week. 

Carried repair works on the steam turbine control and stop valve, with delivery to the Delimara Power Station expected next week.

From the investigations carried out so far, indications are that the blade fracture on the rotor was caused by the impact of a piece of metal from the broken steam strainer. The cause of the failure of the strainer is still being investigated, Enemalta said.

Specialised external consultants are being engaged by Enemalta to assist its engineers in carrying out a critical review of the report of the analysis on the broken rotor blade and the full damage report by the manufacturer including the root cause of the failure of the strainer.

Works to reassemble the steam turbine will commence this week, immediately after the delivery of the rotor and stator to Delimara.

It is expected that the steam turbine will be ready for operation around the last week of November when the performance testing programme will recommence, the corporation added.

Enemalta reiterated its position that it will be taking over the Delimara extension only after the root cause of the failure of the strainer has been identified and addressed to its satisfaction and the satisfactory completion of the performance testing.

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