Liberty Industrial Munmorah

Munmorah Power Station

DURATION22 months
CLIENTDelta Electricity

The project involves the removal of a 1400 megawatt coal fired power station including four 350 megawatt steam driven turbo-alternators, two 155 metre high chimney stacks, boiler house, coal handling plant and conveyors and 2.3km of ash lines. The project is the largest power station demolition project to be carried out in Australia to date.

Asbestos removal works have included the removal of large volumes of bonded and friable asbestos. Complicated encapsulation with the use decontamination units for the friable asbestos removal were constructed for the asbestos found within the control rooms of the station. The works were completed within the programmed time frames. More intensive investigations identified numerous areas of asbestos which were not previously identified, and were removed in consultation with the client. Approximately 30,000 square metres of gal-asbestos has been identified for removal during the demolition, involving the use of Elevated Work Platforms at heights of up to 40 metres.

In close cooperation with Safe Work NSW, three blast management plans have been developed for the demolition of two large chimney stacks and two boiler house structures containing four boilers. Explosive demolition of the two stacks are planned for March 2017.

Asbestos removal at the top of the 155 metre high stacks was completed by specialist subcontractors and managed by Liberty Industrial without incident. Both friable and bonded asbestos found within the stacks was removed by Liberty Industrial prior to the explosive demolition of the structures.

Four boiler houses are planned for explosive demolition with two events occurring during 2017. Detailed engineering studies have identified that the coal hoppers will need to be removed to reduce the force on the structural beams and facilitate the rolling of the structure during the blast.

Extensive asbestos removal works will occur prior to these blast events. Once the boiler structures are on the ground, Liberty Industrial’s 240 tonne Liebherr 994 complete with the world’s largest shear attachment, the Genesis GXT 2555R in combination with a fleet of smaller excavators with shear attachments will process the steel for recycling and shipment off site.

Four turbine generators are located within the 270m long turbine house with each set weighing 1200 tonnes. During the planning process it was identified that the two existing 90 tonne gantry cranes located within the turbine house would need to be re-energised and re-certified to assist in the de-construction works. These cranes have been extensively used to remove rotors weighing 54 tonnes, condenser tube casings, and stators all weighing 50t plus after downsizing. A combination hand cutting using standard oxy torches, high flow oxy torches and thermal lances are all required to downsize the larger parts of the turbine generator prior to lifting these heavy items to the turbine house floor, and movement to the scrap area for further downsizing.

Liberty Industrial has full workshop capability on site and constructed a 30m x 20m removable dome shelter for use. A workshop manager and welder are located on-site to maintain and extensive array of equipment including 220T, 120T, 70T, 46T, 38T and 8T excavators and attachments including grabs, magnets, pulverisers, hammers and shears.

Excellence in environmental management is key to the successful demolition of the Munmorah Power Station which is located between Lake Munmorah and Lake Budgewoi which are connected by two canals that run through the site, and are managed under an Environmental Protection Licence.

Stakeholder engagement and management is also an important consideration during the demolition with an operational gas Power Station, two electrical switch yards, a gas plant and surrounding community.

Liberty Industrial is committed to waste reduction and resource recovery with a planned 95% recycling by weight. To date a total of 6100 tonnes of steel, aluminium and other non-ferrous metals have been recycled.

Munmorah Boiler Demolition

Munmorah Boiler Demolition  

Munmorah Chimney Stack Demolition

Munmorah Chimney Stack Demolition