An insight into the planned use of tidal power in the Severn Estuary

1. Presented by: Ioan Jenkins - Development Director

2. Tidal Lagoons:
1. Harness a free and reliable source. The moon
2. Remove risk. Proven hydro turbines and civil
engineering methods
3. Challenge everything. 3 years to analyse every
impact and construction norm
4. Create proof of concept and systematic buy-in. The
world’s first tidal lagoon with unprecedented
community support
How to do big and sustainable, successfully
2

3. OUR VISION

4.  Low carbon electricity: 8-10% of UK
electricity, secured within a decade
 Energy security: Reliable, home-grown
and near continuous power supply from
proven technology, lasting 120 years
 Affordable energy: Lowest generation
cost of all electricity for 85+ years
following investment period. Lower
support cost than most low carbon
electricity; larger lagoons generate
cheaper power
 Hydro for Britain
A national fleet of 6
tidal lagoons to deliver …
1
5

5. 6 lagoons
offshor
e
wind
turbine
s
4416 10reactors= =
Installed capacity : 6 tidal lagoons, 15.9 GW ; London Array, 3.6 MW per turbine ; Hinkley Point C, 1.6GW per reactor
1
7

6. A new UK industry
 UK investment and growth: £30bn+ investment
programme with 50%+ Welsh content, and
65%+ UK content, by developing 5 of 12+
potential sites
 UK jobs: Long-term, diversely skilled, industrial
employment
 Social and economic regeneration: Iconic
energy infrastructure at the heart of the
community
 An industry based in the Swansea Bay City
Region
is created to deliver…

7. It all begins in Swansea Bay

8. Swansea Bay Tidal Lagoon
Wall length: 9.5km
Area: 11.5km2
Rated capacity (@4.5m head): 300MW
Installed capacity: 320MW
Daily generating time: 14 hours
Annual output (net): 495GWh
Annual CO2 savings: 236,000 t
Design life: 120yrs
Height of wall: 5-20m
Wall above low water: 12m (max)
Wall above high water: 3.5m (max)
Tidal range Neaps: 4.1m
Tidal range Springs: 8.5m
• 150,000 homes powered
• c.85% of Swansea Bay’s domestic use
• c.11% of Wales’ domestic use

9. 2014 2015 2016 2017 2018
18 months of development work suggests Swansea Bay offers great potential for lagoon
construction. Key ongoing work streams:
 EIA – scope agreed with regulators, EIA now underway, with collaborative input from
statutory consultees (including NRW and LPAs). PEIR published 4 July.
 Hydrodynamic modelling – multiple lagoon shapes/sizes tested for water quality,
sediment transport and sand erosion/deposition impacts
 Value engineering – reduce cost of sea wall, turbine housing, construction methods
 Turbine design – leading manufacturers Voith/Alstom/GE/Andritz Hydro refining
specifications for low-head bulb turbines
 Grid – planning consent has been achieved with National Grid & Western Power
Distribution
 Leasing & consents – engagement with landowners including The Crown Estate,
ABP Swansea, Swansea University, St Modwen
 Onshore masterplanning – maximising onshore opportunities with ABP & University
Ongoing EIA, viability & design refinement

10. Headline Statistics Following Public Consultation
3.90% 4.30% 6%
85.80%
0.00%
10.00%
20.00%
30.00%
40.00%
50.00%
60.00%
70.00%
80.00%
90.00%
100.00%
No response No Undecided Yes
Having heard more about the project, do you support the proposal for a tidal lagoon and
associated facilities in Swansea Bay?

11. Planning context
2014 2015 2016 2017 2018
Planning Act 2008
 +100MW offshore lagoon = Nationally Significant Infrastructure Project
 Application to Planning Inspectorate (PINS) for decision by Sec. of State for Energy
 Development Consent Order (DCO) combines previous separate consent procedures
 DCO will comprise: lagoon structure, onshore grid connection, supporting development
Marine and Coastal Access Act 2009
 Marine license required for construction and dredging in Welsh waters
 Issued by Welsh Govt. Marine Licensing Team (MLT)
 PINS and MLT cooperate; processes run in parallel
Town & Country Planning Act 1990
 Apply to Swansea/NPT Councils for elements outside the NSIP above Mean Low Water, e.g. bio-
fuels facility

12. Swansea Bay Project Timeline
Planning approval granted
(10th June)
First power
2015 2016 2017 2018 2019
ConstructionFinancial
close

13. PROVEN TECHNOLOGY,
INNOVATIVE THINKING

14. Breakwater design – geotextile option
Water is impounded by a wall or “breakwater” to create a lagoon
1. Breakwater comprises layered geotextiles encased by rock armour
2. Geotextiles are filled with dredged sand from Swansea Bay and then positioned
around
the lagoon’s perimeter
3. Rock is transported from our own quarry to the lagoon by sea
1

15. Geotubes at Incheon Bridge, Korea (© TenCate)

16. Breakwater design – quarry run option
Water is impounded by a wall or “breakwater” to create a lagoon
1. Breakwater comprises bunds of quarry run with sand fill in between
2. Armour rock is placed on top (similar as for geotextile option)
3. Rock and quarry run is transported from our own quarry to the
lagoon by sea
3

17. Turbine house: bidirectional turbines

18. 97% availability in the 47 years
93% efficiency on the ebb
75% efficiency on the flood
Year 47 – first overhaul of turbines, 5 turbines
received replacement parts
Year 48 – control system to be replaced
Years 1 and 47
Over 45 years of field data
La Rance, salt water, 240MW tidal range power station, Brittany,
France

19. EXCELLENCE IN OPTIMISATION

20. Design evolution: 14 options considered

21. UK content
Rohr Turbine – Bulb Turbine © Andritz Hydro
Key component processes - Turbines
Casting Forging Pressing Welding Machining Painting Fabrication
Runner
blades
X X
Runner
hub
X X X
Turbine
shaft
X X X
Discharge
ring
X X X X X
Turbine
housing
X X X X
Bulb nose X X X X
Draft
tube
X X X X
Hatch
cover
X X X X

22. With a Welsh core
The Tidal Lagoon Industry Advisory Group
Chair
 Roger Evans MBE, Schaeffler (UK)
Members
 Owain Davies, Amcanu
 Mark Coia, Mabey Bridge
 Nick Revell, Ledwood Engineering Ltd
 Winston Hall, JW & E Morris & Son Ltd
 Russell Scaplehorn, Hornbill
 Gherold Davies, Fairwood Fabrications
Ltd
 Robert Williams, WRW Group
 Adrian Davies, Acorn
 Gareth Barker, Sheffield Forgemasters
Observers
 Ian Price, CBI
 Robert Lloyd-Griffiths, IoD
Left to right: Russell Scaplehorn, Mark Shorrock (TLP), Roger Evans,
Owain Davies, Winston Hall, Ioan Jenkins (TLP), Nick Revell, Mark Coia
2
2

23. A UK supply
chain
Realising a 50%
Welsh, 65% UK
content aim

24. UK content

25. Business Hub
Purpose:
To foster a world class cluster of manufacturing, assembly and construction
businesses capable of supplying an initial 5 tidal lagoons in the United
Kingdom, with the potential thereafter to supply up to 50 locations world
wide.
The Business Hub is centred on the Swansea City Region where the most
attractive packages can be offered.
Anchor tenants of the Zone will be core Tidal Lagoon Power consortium
members, who can then support a new Tier 1 and Tier 2 infrastructure.
Anchor tenants include Alsotm, Voith and Costain

26. Proposed Pre-assembly areas
• Precast-Assembly Plant – Swansea Bay
City Region . 15 acres
• Turbine Assembly Plant –Swansea Bay
City Region. 3 Acres

27. ENVIRONMENTAL IMPACT

28. 2
Comprehensive assessment of impacts, from construction to
decommissioning, and including cumulative impacts from other
proposed development and activities
• Coastal processes, sediment transport &
contamination
• Marine water quality
• Intertidal & sub-tidal benthic ecology
• Fish, recreational & commercial fisheries
• Marine mammals
• Coastal birds
• Navigation & marine transport
• Terrestrial ecology
• Seascape & visual amenity impact
• Onshore transport & air quality
• Economy, tourism & recreation
• Marine & terrestrial noise
• Archaeology & historic landscape
• Flood risk
• Land quality
• Habitat regulation assessment
• Water Framework Directive assessment

29. Opportunities for environmental positivity
1. Colonisation of the
breakwater
2. Mariculture farm
3. Kittiwake ledges on turbine
housing
4. Artificial reef structures
5. Creation of rock pools
6. Habitat creation: salt
marsh, grassland and dune
7. Oyster spats
1
2
3
4
5
6
7
2

30. ECONOMIC IMPACT

31. Employment and economic
stimulus in Swansea Bay
 Construction: 1850 full time equivalent jobs (5,540 new
job years) directly created during three-year construction
 Operations & maintenance: est. 60 long-term,
permanent jobs running the lagoon
 Leisure: est. up to 90 additional leisure industry jobs
 Gross Value Added: £173m during construction, £264m
lifetime operations, £252m lifetime leisure impacts
Independent data from Cardiff Business School. Turning the Tide:
the economic significance of the Tidal Lagoon Swansea Bay, Pro M Munday,
Pro C Jones, Welsh Economy Research Unit, Cardiff University

32. Attracting tourism
 A ‘must see’ attraction for Wales & the West
 70 – 100,00 visitors expected annually
 Plus 2 - 8,000 visitors attending individual sporting events
The Oyster: offshore building including visitor centre, restaurant, lecture hall and turbine house

33. Lagoon Industry’, Centre for Economics
and Business Research, July 2014
Key findings:
• A national fleet of 6 lagoons would contribute £27bn to UK GDP during 12 years
of construction
 Creating or sustaining 35,800 jobs on average and 70,900 jobs at its peak
 In operation, the fleet would contribute £3.1bn per annum to UK GDP
 Creating or sustaining as many as 6,400 jobs
 Potential to increase net exports by £3.7bn per year – equivalent to 13% of the
current trade deficit

34. SOCIAL IMPACT

35. Sport and Leisure
A public amenity
for:
 Walking
 Cycling
 Running
 Water contact
sports
 Angling
 Bird-watching
 Triathlon Western landfall facilities, including sailing & boating centre, disability sports, beach, rock pools
and children’s play area
3
5

36. Education
STEM Cymru’s Engineering Education Scheme
A unique opportunity to:
Inspire young people
Study real practical challenges
Develop career skills
First ‘Client Based Approach’ with Construction Skills
Primary education
Work Placements 16+
Work Placements 14-16
Curriculum Support Activities
Graduates
Apprentice Starts
Apprentice Completions
Jobs created for local people
NVQ starts for sub contractors
NVQ completions for sub contractors
Advanced health and safety training

37. Cultural programme to:
Stimulate creativity
Showcase local and international art
Culture
Launched ‘Open Call’ Concept Ideas
• International Call-2x10K
• Welsh –Call-3x5k
• Swansea Bay-Call

38. CONCLUSION

39. Helping solve the UK’s
electricity sustainability
problem
Sustainable electricity to:
 Bring down the cost of living
 Keep up with energy demand, today and next century
 Repatriate energy profits and opportunities
 Protect and enhance the environment
 Support a new Industry in Wales and UK
Made possible by an iconic proof-of-concept
project 3

40. Q & A