WelcomeThe aim of this session is to provide information regarding the upcoming demolition activities at The Ferrybridge ‘C’ Power Station.

01

Ferrybridge ‘C’

Ferrybridge ‘C’ Power Station began generating electricity in 1966 when Unit 1 became the first operational 500 megawatt (MW) single shaft machine in the world.

Ferrybridge A

The Demolition of Ferrybridge ‘C’ Power Station

Future of the site

SSE engaged specialist contractor GVA to develop a masterplan for the potential wider redevelopment of the Ferrybridge site including the development of a new build gas fired power station, known as Ferrybridge D.

Further details on the Ferrybridge D project can be found at www.sse.com/ferrybridged

With a total generating capacity of over 2000MW from its four units, Ferrybridge ‘C’ delivered record breaking generation and efficiency on numerous occasions, and is still believed to hold the record for the longest continuous operation of a 500MW coal fired unit, achieved when Unit 2 ran for 5448 continuous hours in 1973.

In 2014, Units 1 and 2 closed due to emissions related legislation and the Power Station officially closed on 31st March 2016 having made a valuable contribution to the Country’s energy generation for over 50 years.

Ferrybridge B

Ferrybridge B Power station was built in the 1950’s with 300MW of generating capacity commissioned in 1959. Its closed in 1992 and was demolished. Part of the ‘B’ site is now occupied by the Etex plasterboard facility.

Power Generation at Ferrybridge began during the 1920’s with the operation of the towns first coal fired power station. Known as Ferrybridge ‘A’ the station had an original generating capacity of just 400MW

Following its closure in 1976 part of the Power Station structure was retained. This was granted listed status in 1987 and is now used by RWE as a heavy machine workshop and training centre.

Ferrybridge ‘C’ Final generation of electricity at Ferrybridge ‘C’ took place on March 23rd 2016 and the station officially closed on 31st March 2016.

Decommissioning

Following its official closure, around 100 SSE staff and contractors were retained to undertake the large scale decommissioning works for the plant and wider site.

Decommissioning works included

• Removal from site of hazardous materials including oils, gases and chemicals

• Cleaning and purging of tanks, vessels and structures

- 1253 tonnes of hazardous waste recovered for recycling

- 700 tonnes of hazardous waste sent for treatment and disposal

- 700 tonnes of boiler ash removed

• Permanent disconnection of the station generators from the National Grid

• De-energisation of electrical supplies to assets planned for demolition

• Installation of new power and water supplies to ensure that necessary site facilities remained available

• Installation of enhanced security to the site perimeter and new HD night vision CCTV system

• Export of around 1 million tonnes of remnant coal from the coal stock yard

• Draining of cooling water ponds, moats and culvets

Following the safe and timely decommissioning of the plant in June 2018 the site was handed over to specialist demolition contractor Keltbray, who have been instructed to undertake the main demolition and clearance of the site.

The Demolition of Ferrybridge ‘C’ Power Station

02

03

The Demolition of Ferrybridge ‘C’ Power Station

DemolitionDemolition of the Ferrybridge ‘C’ Power Station will be undertaken by SSE’s principle contractor Keltbray.

Keltbray is a UK based leading specialist contractor with a wealth of experience in complex demolition and decommissioning works.

Keltbray have undertaken projects of a similar scale to that of Ferrybridge ‘C’, including the demolition of Battersea Power Station as well as high profile city centre projects like Blackfriars Station, London.

Demolition of the site is expected to take around three years with an anticipated completion date of Spring 2021.

Following their appointment in 2018, Keltbray began to establish their site compound. This compound will be accessed via Kirkhaw Lane and provides welfare facilities for the on site team along with access to the site itself.

Explosive Demolition Following its approval for demolition which was granted to SSE by Wakefield Council in 2018, the projects principle contractor Keltbray are now working to finalise plans for the explosive demolition activities at the site.

04

The Demolition of Ferrybridge ‘C’ Power Station

A number of the main structures will be taken down using explosive demolition including:

• Cooling towers

• 2 chimney stacks

• Boiler house

• Boiler house bunker bays

Final design for each structure will be finalised following test blasts at the site.

Explosive Demolition Methodology

Explosive demolition is widely used in the removal of large scale structures and provides an environment which can be managed remotely.

Controlled explosives will be used on the above structures at the site. The explosives are used as a simple tool which enables the release of chemical energy in a defined sequence to ensure the structures develop a predictable and controllable collapse mechanism.

Cutting charges are used to greatly reduce the need for Pre-Weakening of structures

Blowdown Events

It is expected that there will be up to five main blowdown events for the structures at Ferrybridge ‘C’.

The initial event will remove one cooling tower and is expected to take place during July 2019. During this event it will be necessary to temporarily close Kirkhaw Lane. The closure will be managed by local police and will be required for no longer than approximately two hours.

The blowdown of Tower 6 will be used to confirm the final design for the demolition of the remaining cooling towers.

Prior to test blasts a safety zone will be established this will be controlled by marshals, below is an example of the cordon for the test blasts. The safety zone sits within the SSE site boundary for the test blasts.

Initial Cooling Tower to be demolished highlighted in red

Example of cutting charge method

Explosive Demolition (Continued)

The Demolition of Ferrybridge ‘C’ Power Station

Second Event

The second major blowdown event at the site will take place during the autumn of 2019 and will demolish the remaining cooling towers.

Due to the scale of the event it will be necessary to enforce a safe zone area around the site, this will include a number of residents vacating their properties along with the temporary closure of a small number of local roads.

Wider traffic management will also be necessary during the major blowdown events. This is to ensure the safety of users on the nearby road network.

This traffic management will include the setting up of an Exclusion zone around the site typical example shown below;

Main Blowdown Exclusion Zone Legend

© 2018 Google 300 m

Legend Access to school grounds Crowd Barriers Road Closed Traffic Diversion Keltbray Marshal SIA Security Officer Police Officer St Johns First Aid SSE Security Officer Station Number Pota loos Road Sweeper Positions Residents viewing area Filming / camera Positions Control Center / firing point Residents Refreshments area

1

As part of the decommissioning works Refurbishment and Demolition (R&D) surveys were carried out for the project. These surveys identified the Asbestos materials that would require removal prior to the demolition of each structure.

An initial step in the demolition project will be for this material to be removed in a highly controlled and regulated process.

The removal of asbestos will be undertaken by a specialist team employed by Keltbray.

Keltbray and its specialist team are fully licensed asbestos removal contractors and all works are being carried out in strict compliance with the asbestos removal regulations, health and safety regulations and industry codes of practice.

Keltbray have developed programmes, resource requirements, sequencing and detailed

methodology for the removal of these asbestos containing materials (ACMs) at Ferrybridge ‘C’ Power Station.

The process for asbestos removal requires strict processes to be followed including the building of air tight enclosures around the structures prior to removal works commencing.

Asbestos Removal Due to the date of its construction the Ferrybridge ‘C’ power station has a number of buildings which contain asbestos.

05

Test Blasts May 2019

Initial Cooling Tower

July 2019

Remaining Cooling Towers

Q3 2019

Boiler House/

Chimneys June 2020

Bunkers Nov 2020

06

The Demolition of Ferrybridge ‘C’ Power Station

The Demolition Process

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Demolition of the power station and associated buildings will be undertaken using various methods including the use of controlled explosives for the main structures.

Alongside explosive demolition, Keltbray will also use the following methods:

• High Reach Machine Shears

• Controlled Collapse

• Dismantling (Reverse installation)

• Manual Cutting / Burning

The image below shows the parts of the site which will be included in the demolition process.

Precipitators

The Precipitator units, located to the south of the Boiler House on the main power station area, stand at 55m in height. When operational the plant had six precipitator units for each boiler which used high voltage electrostatic charge to remove dust particles from the gas flow. The Precipitators will be demolished using a high reach mechanical shearing system.

Demolition of the boiler house will take place during the same blowdown event as the two chimney stacks on the site.

The boiler house is situated to the west of the cooling towers and is the tallest building at the Ferrybridge site. During its operational life the building contained plant and equipment

to grind the coal and transport it to four large boilers suspended from the roof. The coal combusted in the boilers, generating the heat required to turn the water into steam for the turbine. High reach mechanical shears will be used to demolish the boiler house.

During its operational life, Ferrybridge ‘C’ used coal as its primary fuel. Although coal deliveries were mostly managed via the sites dedicated rail loop, the River Aire was also used to receive coal from nearby collieries.

The barge unloading system was purpose built at Ferrybridge ‘C’ to manage the delivery of up to 30,000 tonnes of coal per week.

Each barge contained around 170 tonnes of coal and would be pushed over a submerged unloader cradle. The entire barge, with a weight of around 240 tonnes, was then raised out of the water and tipped at a height of 30m into hoppers, which then connected to the stations coal stocking and delivery system.

Barge deliveries served the site until December 2002 when environmental and commercial constraints meant that it was no longer viable to take deliveries using this method resulting in over 43 million tonnes of fuel being delivered by river.

Throughout its operational life the barge unloader took successful delivery of over 43 million tonnes of coal and is now fully decommissioned and will be demolished as part of the project.

Barge Unloader

The Boiler House

The Demolition of Ferrybridge ‘C’ Power Station

The Demolition Process (Continued)

07

Cooling Towers and Stacks

Throughout its operational life Ferrybridge ‘C’ Power Station used a cooling system consisting of eight natural draft cooling towers.

The cooling towers, which are 114m in height, were constructed using concrete and have a base diameter of 92m. The visible plume which could be seen emerging from the cooling towers during their operational life was the water vapour which was generated as part of the cooling process.

The cooling towers will be demolished as part of the project as will the sites two main chimney stacks which currently stand at 198m in height.

Demolition of the cooling towers and stacks will involve the use of explosive demolition. Leg structures will be weakened which will enable the towers and stacks to collapse to ground level utilising natural gravitational forces.

Test Blasts for Cooling Towers

Prior to the main explosive demolition activities at the site, Keltbray will undertake a number of test blasts in order to finalise the design of explosive demolition.

The Turbine Hall and Control Buildings at Ferrybridge ‘C’ are around 33metres in height and are located at the North end of the main power station building.

Within the building there are 4 Turbine / Generator sets of identical design and layout. In addition to the turbines and generator sets there are 3 overhead cranes in the area, one was used to service the generators and the other to service the turbine and ancillary units.

Turbine Hall

Within the Bunker bay building there are 16 bunkers, which fed 32 coal mills on the ground floor. A De-aerator vessel and Water Feed tank for each unit are situated within the building.

Bunkers and Mills

Managing Local Impact SSE aims to be a responsible neighbour and as such will work with our principle contractor Keltbray to manage and minimise any potential impacts to the local area in relation to the demolition of Ferrybridge ‘C’.

The Demolition of Ferrybridge ‘C’ Power Station

08

Traffic and Transport

SSE is aware that the transport routes used for the demolition project may be a key concern for the sites neighbours. A traffic management plan has been established and agreed with Wakefield Council in order to manage any associated vehicle movements.

Movements relating to the demolition project will use the sites dedicated access and egress point which is located on Kirkhaw Lane.

The map below shows the agreed transport route for the site. Vehicles leaving the site to travel North will use the A162 North via Old Great North Road. HGV’s leaving the site travelling South will use the A162 North then U-turn at the Dish Hill roundabout.

Various materials will be removed from the site throughout the demolition project with an anticipated average of 30 vehicle movements a day. Vehicles will use the projects dedicated entrance via Kirkhaw Lane.

As part of the demolition activities, all concrete from the power station will be crushed and re-used on site to fill voids etc

Normal working hours for the site will be

08.00 to 18.00 Hrs Monday to Friday 08.00 to 14.00 Hrs Saturday

There may be a requirement for critical works to be carried out outside of the above hours

Alongside ongoing vehicle movements there will be a small number of abnormal loads which will need to be delivered to the site, including heavy plant such as excavators. Keltbray will work alongside the local police authority to co-ordinate deliveries to site which require a movement order.

Dust Management

Keltbray have deployed a number of static dust monitoring stations at the site to undertake continuous monitoring throughout the project. Additional measures, such as a full time road sweeper and wheel wash for vehicles entering and exiting the site will also be used.

Noise and Vibration

Continuous monitoring will take place throughout the demolition project to ensure that noise and vibration levels do not exceed those permitted for the site.

Traffic movements relating to the demolition works at site have been assessed and show a maximum of 2% increase to the local network.