INCE POWER STATION

Opened by

THE RT. HON. LORD CITRINE, P.C., K.B.E., LL.D., Comp. I.E.E

Chairman, Central Electricity Authority

9th October 1957

Lord Citrine

 

THE RT. HON. LORD CITRINE, P.C., K.B.E., LL.D., Comp. I.E.E

  Chairman, Central Electricity Authority

 

CENTRAL ELECTRICITY AUTHORITY

North West, Merseyside and North Wales Division

A.R. COOPER, M.Eng., M.I.E.E.. M.Inst.F.
Controller

 

J. L. ASHWORTH, A.M.I.E.E., A.M.I. Mech.E.
Deputy Controller

 

C. R. WATSON SMYTH, M.Inst.F.
Chief Generation Engineer (Construction)

 

E. W. CONNON, B.Sc.(Eng.) M.Eng., M.I.E.E., A.M.I.Mech.E
Divisional Electrical Engineer

 

P. H. FLATT, B.Sc.(Econ), F.C.I.S., A.M.I.E.E., F.C.W.A., M.B.I.M
Divisional Secretary

 

A. H. CAMPBELL, C.A.
Divisional Accountant

 

E. BUTTERWORTH, A.S.A.A.
Director of Labour and Welfare

 

A. R. COOPER, M. Eng., M.I.E.E., M. Inst. F.  
  Controller

 

J. L. ASHWORTH, A.M.I.E.E., A.M.I.Mech.E.
  Deputy Controller

 

 

C. R. WATSON SMYTH
M. Inst. F.
Chief Generation Engineer (Construction)
D. F. GRANT
A.M.I.E.E.  
Generation Engineer (Operation)
A. N. DUFFETT, B.Eng., A.M.I.E.E., A.M.I.Mech.E., A.M.Inst.F.
Generation Engineer (Construction)
A. PARKER, A.M.I.Mech.E. A.M.I.E.E., M.Inst.F.
Ince Power Station Superintendent

 

 

INCE POWER STATION

 

At the end of 1949 it became apparent that the future power demand of the atomic factory at Capenhurst (owned then by the Ministry of Supply and now by the United Kingdom Atomic Energy Authority) would be such that the construction of a new power station in the Wirral peninsula of Cheshire was essential.  A site was therefore sought within the limiting areas specified by the Ministry of Supply and after investigation the present location was chosen. This is situated on the edge of the Ince marshes, near Elton village, and immediately to the north of the Frodsham-Ellesmere Port railway.

The station, now fully completed, has a total capacity of 240,000 kilowatts made up of four 60,000 kilowatt turbo-alternators, each of which is supplied with steam from a boiler of 550,000 lb. per hour capacity.  Each boiler and its associated turbine operate as a complete unit, no interconnection of boilers being included in the design.

As a result of a study of some aspects of American boiler design by the Authority's engineers, it was decided in view of the need for speed in construction and the conservation of scarce building material and labour that the boilers at Ince should be of semi-outdoor construction; this approach being a compromise between a completely outdoor arrangement and the conventional totally enclosed boiler house.

Coal is delivered to the station by rail, normally from the East Midlands coalfields, and large sidings with a coal storage area have been provided on the site.

Ince, however, is one of 16 power stations, which it was decided at national level to adapt for oil firing.  The construction of the station was well advanced when it became apparent that the country's future power requirements could not be obtained solely from coal and investigations were therefore made at a number of power stations into the possibility of adapting boilers for dual firing, i.e. to be made capable of burning heavy fuel oil as an alternative to pulverised coal. At Ince, as at other stations, conversion was found to be practicable and the additional plant and equipment was planned.

Ince power station

The supplies of water, both for boiler and cooling tower make-up, are pumped from the River Dee at Chester through a pipeline constructed specifically for Capenhurst, Ince power station and industrial development in the Ellesmere Port district.  The water scheme has been provided by the West Cheshire Water Board and has entailed participation in the Bala Lake Scheme.  A reservoir is under construction on the high ground at Ince village for the purpose of emergency water supplies in the event of a failure of the normal make-up quantity.

Approximately 83 acres of land was acquired to accommodate the station and as a result of trial borings, the main buildings were located at a point where the load bearing sandstone approached its highest level.  After the removal of 14 feet of top soil and other low load bearing material, it was possible to erect the main buildings directly on the hard bound sand, thus eliminating the necessity for piled foundations.  The cooling towers and the north chimney did require piling as the sandstone formation falls away sharply from the main station site.

Messrs. Rendel, Palmer & Tritton were appointed by the Authority as Civil Engineering Consultants, all Mechanical and Electrical plant in the station being engineered directly by the Authority.  

Excavations for main buildings

BUILDING AND

CIVIL ENGINEERING WORK

Foundations

The basement to the boiler and turbine houses has a reinforced concrete floor and reinforced retaining walls enclosing the whole area, both floor and walls being provided with an external layer of waterproofing material.  The circulating water culverts are constructed in reinforced concrete beneath the turbine house floor level. The turbo-alternator blocks are also constructed of reinforced concrete and are arranged to be completely independent of the main building superstructure.

Foundations to each of the four cooling towers are located over a sub-soil consisting of peat, necessitating the use of reinforced con­crete pre-cast piles~  The pond base is of reinforced concrete and carried directly on the pile caps.

The north chimney is also supported on reinforced concrete piles, but the south chimney has a mass concrete foundation due to the difficulty of driving piles in the area.

The basement floor throughout the boiler and turbine houses was completed by laying 2 feet 3 inches of mass topping concrete during the latter stages of construction.  This made possible the inclusion of various cable trenches and drains at a later date, thus simplifying programming of the work.

MAIN BUILDING

Steelwork

The main buildings are of steel framed construction; the boiler and turbine columns are welded sections using broad flanged beams. Due to the decision to use sheet cladding on the boiler house it was possible to use lighter steelwork than would have been the case with conventional brick superstructure.  The coal bunkers are of steel plate and girder construction.  The whole building, which measures 350 feet long by 232  feet  wide,  contains approximately 3,800 tons of steel.

Structural steelwork

Superstructure

The parts of the boiler house, which are enclosed, are clad with "Cellactite" sheeting, the minimum amount of brickwork being used.  The turbine house is of brick construction with the doors and window surrounds of pre-fabricated stone.  Windows throughout the station are steel framed, fitted with plain glass.  The roofs are formed from asbestos cement cavity decking, covered with three layer built up felt surfacing laid on an insulating layer and finished off with light reflecting stone chippings.  The turbine house has "Lenscrete" roof lights, some of which are provided with louvres for ventilation.

All the suspended concrete floors in the station are of steel filler beam construction.  The operating floor finishes are quarry tiles in the boiler house; in the turbine house, terrazzo surfaces.  The basement throughout has a granolithic finish.

Aluminium faced doors have been provided in the west wall of the turbine house for electrical rotor withdrawal, thus affecting a saving of several feet in the width of the building.

Structural steelwork for semi-outdoor boilers

ANCILLARY CIVIL WORKS

Cooling Towers

Each of the four cooling towers handles circulating water for condensers associated with one turbine, the culvert system being so arranged that any machine can be operated in conjunction with any tower.  The towers are 250 feet high with a base diameter of 205 feet.  The temperature drop of the circulating water through the tower is approximately 14 degrees Fahrenheit.  The cooling capacity of each tower is 2¾ million gallons per hour.  

Chimneys

The two circular chimneys are built from brick supported on a reinforced concrete plinth of square section 61 feet high.  The total chimney height is 300 feet with an internal diameter of 16 feet.  The external brickwork is "Nori" rustic brick, the acid and heat resisting lining of which is separated by an air space; the top 3 feet of the chimney is formed in acid resisting brickwork.  Each chimney carries the flue gases away from two boilers.

Administration and Amenity Buildings

The administration and amenity block is arranged adjacent to the turbine house but is separate from the main building.  An overhead access bridge joins the administration block with the turbine house.

The administration block contains the control room, cable rooms, battery rooms, laboratory, calorifier room and administration offices, and arranged in the amenity block are canteen and recreational facilities, heated double-tier lockers, showers, washing rooms, lavatories, medical treatment rooms and the time office.

To provide space heating and hot water services within the building, the calorifier plant utilises steam bled from any one of four turbo-alternator sets in the turbine house.  The condensed steam from the calorifiers is returned to the feed heating system at the turbine.  This gives a very satisfactory and economic system.  In addition to the calorifiers, a 150 kilowatt standby electrode boiler has been included and provided initial heating requirements until the first turbine was commissioned.

PLANT

Turbo-Alternators and Auxiliary Plant

The turbo-alternator plant comprises four 60,000 kilowatt turbo generators operating under steam conditions of 900 lb per square inch and 900 degrees Fahrenheit, running at 3,000 revolutions per minute.

Steam from the low pressure cylinder exhausts into three-pass, twin casing, surface condensers working under a vacuum of 28.7 inches of mercury when the machine is operating at 60,000 kilowatts. Air is extracted from the condensers by two 100% steam operated air ejectors and for starting up purposes a quick start ejector is installed which will raise a vacuum of 24 inches of mercury in approximately ten minutes.

Two 100% capacity electrically driven extraction pumps remove the condensate from the condensers and deliver it to the feed heaters.  There are five feed heaters, three of which are high pres­sure, on the discharge side of the boiler feed pumps, and two are low pressure.  These heaters utilise steam bled from various stages of the turbine, giving a final temperature of the feed water leaving the last heater of 385 degrees Fahrenheit at full load.  One of the low pressure heaters is of the direct contact type which acts as a deaerator.  The remaining heaters are of the conventional tubular type.

The steam to the turbines is delivered through 12 inch diameter pipework which is of a chromium molybdenum alloy.  This steel has special creep resisting properties which are essential for the high temperature conditions met in this station.

The 12 inch steam pipe divides into two 9 inch loops after the main turbine stop valve, delivering the steam through strainers to two emergency valves, after which it splits again to provide steam to four throttle valves admitting the steam to the high pressure turbine. The emergency and throttle valves on the turbines are controlled by a relay oil pressure system.  This relay system is linked to various devices which trip the machine by releasing the oil pressure under dangerous conditions such as overspeeding, loss of vacuum, low oil level or certain electrical faults. In addition to the tripping mechanism, the turbine is progressively unloaded should vacuum begin to fall. Similarly, the turbine is unloaded if the boiler pressure falls.

Turbine house

Motor driven barring gear is installed to rotate the turbine and alternator shaft continuously prior to starting up or immediately after shutting down the machine, thus ensuring even cooling of the shafts and eliminating distortions.  This also enables the machine to be started up quickly within a short period of shutdown.

The main turbine oil pump is of the centrifugal type and located on the governor end of the turbine shaft.  This pump takes over the duty of the alternating current motor driven auxiliary oil pump when the machine reaches a speed of approximately 2,600 revolutions per minute

The auxiliary oil pump supplies oil to the bearings and the governor gear and is arranged to start up automatically should the pressure from the main oil pump fall below a pre-determined level. A direct current motor driven oil pump is installed to provide oil to the bearings in the event of a failure of the auxiliary oil pump. This delivers sufficient oil to the bearings to bring the machine safely to rest.

To commence barring the machine, a jacking oil pump is available to lift the shaft in its bearings and initiate the formation of an oil film.

Two 100% capacity oil coolers are provided with each machine, the cooling water being drawn from the circulating water system.

A motor driven centrifugal oil purifier is installed with each set and is located on the operating floor.

The condensate is treated by the injection of chemicals immediately before the boiler feed pumps; the dosing is completely automatic and is proportioned to the flow of condensate.

Three sets of evaporating plant are accommodated in the turbine house basement adjacent to each of Sets 1, 2 and 3.  Each plant is a self-contained, triple effect, live steam evaporator and supplies 34,000 lb per hour of distilled water.  This water is pumped to the reserve water tank and used for boiler make-up.

To ensure that a supply of air freed water for boiler make-up is always available, a shunt de-aerator unit of the direct contact type is installed with each machine.

The alternator is designed to generate at 11.8 kilovolts which is fed through the main bus bars direct to the generator transformer, where it is raised to 132 kilovolts.

The alternator is hydrogen cooled, the hydrogen passing through tubular type coolers supplied with water from the circulating system. The pressure of hydrogen in the alternator casing is one half lb per square inch gauge.

Feed Pumps

Two 100% capacity electrically driven feed pumps feed each boiler.  These pumps rotate at 3,000 revolutions per minute and the motors are 1,400 horse power.  The delivery pressure is 1,220 lb per square inch when the set is on full load.  The pumps are arranged so that in the event of a failure of one pump the standby pump will start up automatically.

 

Boiler feed pump for No. 3 machine

Water Treatment Plant

In order to prevent corrosion and scale formation in the boilers and associated pipework, it is essential that the boilers be provided with pure water.  The water treatment plant installed is of the hydrogen-ion sodium blend process.  The water is first dosed with Aluminium sulphate; it is then passed through pressure vessels con­taining sand filters which remove suspended solids, after which it enters the automatic treatment plant.

The water divides into two main streams.  One passes through the hydrogen-ion unit where the salts present in the water are converted to the corresponding acids.  The stream which passes to the sodium zeolite section undergoes a base exchange reaction.

The water delivered from the two processes is then automatically combined and so proportioned that the bicarbonates present in one stream and the acids in the other neutralise each other, resulting in the liberation of carbon dioxide.  The blended water has now zero hardness and low alkalinity.

The free carbon dioxide released from the blended water is removed by passing through a de-gassifier tower.  Treated water is stored in tanks in the main station building from where it is delivered to the evaporating plant before passing to the boilers as make-up water.  The total capacity of the water softening plant is 270,000 gallons of treated water per day.

Water treatment house

Boiler Plant

The boiler plant consists of four Lopulco radiant beat type boilers with a steam capacity of 550,000 lb per hour at a pressure of 950 lb per square inch and 925 degrees Fahrenheit at the superheater outlet.

Boiler erection - drum level

The boilers are of semi-outdoor construction.  Special precautions have been taken to prevent freezing trouble that might occur during winter operation.  The drum floor of each boiler is made into a separate enclosure by light sheet cladding thus giving a measure of heat insulation from adjacent boilers whilst work is proceeding on a particular boiler which is off for maintenance.

The boiler is of the tri-drum type, each drum being of forged steel construction.  The furnace chamber is completely water cooled and the wall tubes are of finned construction.  Each boiler is fired by pulverised coal which is ground by four suction type two roll mills, each of capacity 13 tons per hour.  A small " Impax " hammer mill is used for bringing the boiler up to pressure.

Four pulverised fuel burners are arranged at each corner of the combustion chamber for tangential firing, a high turbulence being obtained in the furnace  Superheat temperature is controlled by elevating or depressing the angle of the burners. The boiler is initially ignited by means of oil burners from which ignition on the coal burners is then established. The superheater is of the all welded type, the primary section being composed of multiple loop horizontal contra-flow elements while the secondary stage is of the pendant parallel flow type.

 

View from south-west showing semi-outdoor boilers

Each boiler is provided with an all welded economiser which is arranged in two banks.  The tube elements are arranged horizontally in such a way that the gases flow in a vertical path between them.

The air heaters are of the rotary type arranged for regenerative heat transfer.  The assembly consists of a mild steel casing in which is housed the rotating heating elements.  The hot flue gases pass through one side, heating the elements, whilst through the other half passes the incoming air prior to entering the furnace.

The automatic boiler control equipment, operated pneumatically, uses compressed air at a pressure of 30 lb per square inch to govern the control of the fuel, air for combustion, furnace pressure and steam pressure.

The main dampers on the boiler unit are remotely controlled by hydraulic mechanism from the main panel.

 

Induced draught fan for No.1 boiler

 

Coal Handling Plant

When the station is on full load the consumption of coal can reach approximately 18,000 tons per week.  The sidings are capable of accommodating 600 rail wagons of 10 to 24 tons capacity which are emptied into hoppers by means of three automatic wagon tipplers.

A novel device for drawing the wagons on to the tippler platform is incorporated.  This is known as the " beetle " marshalling gear and eliminates the use of ropes and capstans.

Boiler house mill bay

The coal from the tippler hoppers is delivered to feeder belts, which, in turn, pass the coal to a system of duplicate conveyor belts which can deliver the coal at a rate of 400 tons per hour to the boiler house bunkers or to the coal storage area as required.

The coal may be reclaimed from stock by bulldozing it into two underground hoppers whence it is again transferred to the main conveyor system to the coal bunkers.  The conveyor belts are duplicated and each is of 100 % capacity.

The effective bunker capacity per boiler is 900 tons.

 

Coal wagon tippler

Ash and Dust Handling Plant

The products of combustion in the boilers are handled in two ways. The heavy particles of ash fall to the bottom of the combustion chamber and are collected in water filled ash hoppers.  The light dust particles pass with the flue gases into a separate collecting system.

The contents of the ash hoppers are emptied periodically into a sluiceway in the boiler house basement, the ash being carried by a stream of water into two collecting pits outside the station.  The water to handle the ash is delivered through a series of high pressure jets which are distributed throughout the length of the system, thus eliminating blockages.  The ash is removed from the collecting pits by an overhead travelling grab crane and carried away by road vehicle to various dumping grounds.  The water which conveys the ash is drained from the pit, pumped to a reservoir, returned to the high pressure pumps and used again, thus the amount of make-up water is reduced to a minimum.

The dust which is carried by the flue gases is first passed through mechanical collectors, two of which are provided per boiler.  This plant comprises a bank of cells which induce a series of vortices and the resulting centrifugal force carries the dust particles to the periphery of each cell.  From this position the dust can fall into hoppers.

The gases from each boiler then pass through two electrostatic precipitators arranged in parallel.  These consist of vertical banks of hexagonal tubes with central wire electrodes.  In passing through the tubes the dust receives a static charge and is collected on the walls. The dust is then periodically discharged into hoppers by automatic operation of vibrating gear. From the various collecting hoppers the dust is conveyed under vacuum to elevated reinforced concrete dust bunkers whence it is passed through a screw type mixer conveyor and with the addition of a small amount of water, to facilitate handling and eliminate dust nuisance, it is discharged to road wagons.

The vacuum on the dust line is raised by passing the water from the high pressure pumps through an ejector, thus the same water is used for both ash and dust disposal.

Oil Firing Plant

The oil storage installation consists of three 8,000 ton tanks.

The oil to be used is Bunker C with a viscosity at 100 degrees Fahrenheit of between 4,50016,000 seconds Redwood No.1 and this will be pumped through a single pipeline from the nearby Stanlow Oil Refinery to site storage tanks.

The sides and roofs of the storage tanks are lagged and heating coils are provided to maintain the oil at approximately 140 degrees Fahrenheit.

From the storage tanks the oil is pumped through trace heated mains to the auxiliary boiler house and to the main boilers, and the surplus is circulated back to the tanks.  A separate pump house has been provided to house the oil transfer pumps.  The auxiliary boiler house is an addition to the station and contains three 15,000 lb/per hour Economic boilers which provide the low pressure steam for heating the oil in the tanks and pipelines and to the correct temperature for atomising before burning in the main boilers.

The conversion of the main boilers has been arranged to preserve the unit system originally adopted.  Separate oil pumping and heating sets are provided for each of the boilers; these are designed to raise the pressure and temperature of the oil to a maximum of 400 lb per square inch and 300 degrees Fahrenheit to give perfect atomising for burning.

The oil burners are located in the four corners of the furnace in the boxes originally housing the coal burners.  There arc seven burners in each corner and the tilting feature for superheat control has been retained.

The existing ash hoppers under the boiler furnaces will not be necessary when oil is being burnt and these are to be isolated.  A condensate recovery system is provided.

Circulating Water Pumps

Four circulating water pumps, each of capacity 43,600 gallons per minute are housed in a separate building, each pump providing sufficient water for one machine.  The cooling tower discharge delivers the water to the pump suctions which, in turn, pump the water through culverts to the condensers and back to the cooling tower distribution troughs whence it falls back into the ponds and returns to the circulating water pumps.

Chlorination

The make-up water supplied to the cooling towers is chlorinated before leaving the pumphouse at Chester, but to eliminate the growth of algae in the condenser tubes a supply of chlorine is injected automatically at each condenser inlet.

 

Circulating water pump house

Workshop

Adjoining the north of the turbine house, a workshop has been constructed.  This is provided with a 10 ton overhead electrically operated travelling crane.  The shop is equipped with lathes, milling machines, radial and bench drilling machines, blacksmith equipment, and has an electricians' shop and instrument workshop.

Control and Relay Rooms

The main control room is situated in the administration building which also houses the relay and meter room and a mess room.  From the control room the Control Engineer is in direct telecommunication with all operational positions.

 

Control room

Fire Fighting

Fire hydrants are installed on a ring main round the station and at numerous points and levels within the station.

Automatic spray type fire protection equipment is arranged to safeguard particularly vulnerable points inside the station, and the outdoor transformers.

 

ELECTRICAL EQUIPMENT

Generator Transformers

The generators are connected to the 132 kV system by single core oil filled cables through 72 MVA 11.8 / 132 kV generator transformers which are of the forced oil air blast type, having "On Load" tap changing equipment.

Station Auxiliary Supplies

Electrically, each turbo-alternator and boiler is operated on the unit principle, normal running supplies being derived from unit transformers directly connected to the main alternator.  The unit and boiler auxiliary transformers are located outdoors in an enclosure with the generator transformers.

General station supplies are obtained from two 7.5 MVA station transformers located outdoors in the 132 kV switchgear enclosure. They are of the naturally oil cooled type, having "On Load" tap changing equipment.

 

Boiler / turbine unit control panel

Diagram of main and auxiliary connections

Auxiliary Switchgear

The 3.3 kV and 415 volt switchgear is of the air break type, having breaking capacity ratings of 150 MVA and 25 MVA respectively.  The switchboards are located in the annexe between the boiler house and turbine house.

Cable Work

The station is connected to the 132 kV switchgear enclosure by cable conduits which convey all main and multicore cables between the two points.  The majority of the auxiliary cables inside the station are run in bituminised fibre conduit laid in the topping concrete.

Cables, in general, are of the paper insulated, non-draining type. Lead sheathed V.l.R. control cables and mineral insulated copper sheathed cables are also used.

 

Unit switchgear

132 kV SUBSTATION

The 132 kV substation is of double busbar type with air blast switchgear and manually operated isolators.

There are 19 circuit breakers comprising:-

    2 bus couplers

1 bus section - and those associated with

4 generator transformers

2 station transformers

8 feeders

2 reactors.

Two bus section circuit breakers are under construction and two further A.C.Bs for two Grid transformer circuits will shortly be added.

 

132 kV switching station

The air supply for operation of the A.C.Bs is obtained from four 3-stage automatic compressor units at 600 lb per square inch. The air is stored at this pressure in four outdoor air receivers and is reduced to 300 lb per square inch, distributed by ring main to the A.C.Bs where it is stored for operation of the breakers and also further reduced in pressure for air conditioning.

The 132 kV feeders are of overhead construction supported on lattice steel double circuit towers.

The control and protective gear associated with the 132 kV plant and with the generators, generator transformers and station transformers was engineered and installed along with the 132 kV switchgear.

 

 

MAIN CONTRACTORS AND

PRINCIPAL SUB-CONTRACTORS

 

CIVIL ENGINEERING WORKS

 

RECLAMATION A. Monk & Co.
Sub- Contractors:
   Fencing Penfold & Co., Ltd
   
MAIN AND ANCILLARY FOUNDATIONS, PERMANENT ROADS, PILING, ETC. Holland & Hannen & Cubitts, Ltd.
   
SUPERSTRUCTURE, MAIN BUILDING ADMINISTRATION AND ANCILLARY BUILDINGS Holland & Hannen & Cubitts, Ltd.
Sub- Contractors:
   Cladding Cellactite & British Uralite, Ltd
   Bricks Accrington Brick & Tile Co., Ltd. Barker & Jones, Ltd.
   Cavity Decking Roof Turners Asbestos Cement
   Roof Lights Girlings Ferro Concrete Co., Ltd
   Metal Windows Williams & Williams Ltd
   Artificial Stone Liverpool Artificial Stone Co., Ltd
   Roller Shutters Haskins
  Rubber Floor Tiles North British Rubber Co., Ltd
   Wood Block Flooring R. W. Brooke & Co., Ltd
   Thermoplastic Tile Flooring Rowan & Bowden Ltd.
   Guniting Concrete Proofing Co., Ltd
   Balustrading Bayliss, Jones & Bayliss, Ltd
   Terrazzo Diespeker & Co., Ltd
   Laboratory Fittings Ayrton-Graham Ltd.
   Lighting Standards Spun Concrete Ltd. Concrete Utilities Ltd.
   Administration Heating System Brightside Heating & Engineering Co., Ltd
  Canteen (Ancillary Equipment) Rowe Bros.
   Lift Aldous Campbell Ltd.
   Fencing Bayliss, Jones & Bayliss, Ltd
   Asphalt Val-de-Travers Ltd.
   Felt Roofing Vulcanite Ltd.
   Plastering & Granolithic Floors Plasterers, Ltd.
   
STRUCTURAL STEELWORK Horseley Bridge & Thomas Piggot, Ltd.
   Erection by Carter Horseley (Eng.) Ltd.
   
CHIMNEYS D. Theaker & Co. Ltd.
   
COOLING TOWERS Film Cooling Towers, 1925, Ltd.
   Civil Sub-Contractor J. L. Kier, Ltd.
   
RAILWAY SIDINGS B.C.S. (Engineers & Contractors), Ltd.
   
AGRICULTURAL ROAD WORKS J. W. Flather, Ltd.
 

MECHANICAL ENGINEERING PLANT

 

BOILER UNITS, PULVERISED FUEL EQUIPMENT AND AUXILIARY PLANT International Combustion, Ltd.
Sub- Contractors:
   Boiler Drums English Steel Corporation, Ltd.
   Boiler and Furnace Tubing Richards & Ross, Ltd.
   Superheaters Superheater Co., Ltd.
   Economisers Senior Economisers, Ltd.
   Boiler Valves and Mountings Hopkinsons, Ltd.
   Pipework Aiton & Co., Ltd.
   Air Heaters and Casings James Howden (Land), Ltd.
   I.D. and F.D. Fans James Howden (Land), Ltd.
   Fan Motors English Electric Co., Ltd.
   Insulating Refractories Ipscol, Ltd.
   Asbestos Material Cape Asbestos Co., Ltd
   Boiler Brickwork Kingscliff Insulating Products, Ltd.
   Pipework Insulating Material Chemical & Insulating Co., Ltd
   Electrostatic Precipitators Sturtevant Engineering Co., Ltd.
   Concrete Structure Bierrum & Partners, Ltd.
   Electrical Equipment British Thompson-Houston Co., Ltd
   Oil Fuel Burners and Pipework Wallsend Slipway & Eng. Co., Ltd.
   Coal Weighing Machines Richard Simon & Eng. Co., Ltd.
   Sootblowing Equipment Ivor Power Specialty Co., Ltd.
   Instrument and Control Panels Electroflo Meters, Ltd.
   Boiler Automatic Control Equipment Electroflo Meters, Ltd.
   Steam Temperature Control Equipment George Kent, Ltd.
   Motor for Auxiliaries Laurence Scott & Electromotors, Ltd.
   
TURBO-ALTERNATOR PLANT The General Electric Co., Ltd.
Sub- Contractors:
   Oil Purifier Alfa-Laval Co., Ltd.
   Auxiliary Oil Pump Mirrlees (Engineers), Ltd.
   Flushing Oil Pump Mirrlees (Engineers), Ltd.
   Jacking Pump Mirrlees (Engineers), Ltd.
   Barring Gear Mirrlees (Engineers), Ltd.
   Hydrogen Coolers Premier Cooler & Eng. Co., Ltd
   Hydrogen Seal Oil Pump Mirrlees (Engineers), Ltd.
   C.W. Booster Pumps Worthington & Simpson, Ltd.
   
CONDENSING AND FEED HEATING PLANT Hick Hargreaves & Co., Ltd.
Sub- Contractors:
   Condenser Shells The Colville Construction Co., Ltd.
   Condenser Tubes and Tube Plates Yorkshire Copper Works, Ltd. (I.C.I. Metals Division)
   Circulating Water Valves J. Blakeborough & Sons, Ltd.
   Motors The General Electric Co., Ltd.
   Instruments George Kent, Ltd.
   Oxygen Recorder Cambridge Instrument Co., Ltd.
   Water Purity Meter Evershed & Vignoles
   Gauges Budenberg Gauge Co., Ltd.
   
COAL HANDLING PLANT Simon-Carves, Ltd.
Main Sub- Contractor:
Naylor Brothers, Ltd.
Sub- Contractors:
   Coal Wagon Tipplers Mitchell Engineering Co. Ltd.
   Tippler Motors The General Electric Co., Ltd.
   Tippler Weighbridge W. & T. Avery, Ltd.
   Conveyor Belting Greengate & Irwell Rubber Co., Ltd.
   Belt Weighers Adequate Weighers, Ltd.
   Magnetic Pulleys Electromagneto, Ltd.
   
ASH AND DUST HANDLING PLANT Babcock & Wilcox, Ltd.
Sub- Contractors:
   
   ASH PLANT
   Sealing Water Pumps Worthington & Simpson, Ltd.
   Bilge Pumps Gwynnes Pumps, Ltd
   Valves Sir William H. Bailey & Co., Ltd.
   DUST PLANT
   Dust Cyclone Collectors Babcock & Wilcox, Ltd.
   Mixer Conveyors James Sadler, Ltd.
   
 BOILER FEED PUMPS Sulzer Bros. ( London), Ltd.
Sub- Contractors:
    Motors
Brown Boveri, Ltd.
English Electric Co., Ltd.
   
 STEAM AND FEED PIPEWORK Babcock & Wilcox, Ltd.
Sub- Contractors:
   Valves Hopkinsons, Ltd.
   Steam Traps Hopkinsons, Ltd.
   
EVAPORATOR Aiton & Co., Ltd.
   
CIRCULATING WATER PUMPS, VALVES AND PIPEWORK Drysdale & Co., Ltd.
Sub- Contractors:
   Motors English Construction Co., Ltd.
   Sluice Valves J. Blakeborough & Sons, Ltd.
   Non-return Valves J. Blakeborough & Sons, Ltd.
   Piping Aiton & Co., Ltd.
   C.W. System Control Panel Automatic Telephone & Elec. Co., Ltd.
   
LOW PRESSURE PIPEWORK AND VALVES Brightside Foundry & Engineering Co., Ltd
   
CHLORINATION Wallace & Tiernan, Ltd.
Sub- Contractors:
   Pipework and Valves Filtrators, Ltd.
   Chlorine Pump Pulsometer Engineering Co., Ltd.
   Strainer Royles, Ltd.
   Pump Motor Brookes Motors, Ltd.
   Drum Lifting Gear Felco Hoists, Ltd.
   
WATER SOFTENING PLANT Permutit Co., Ltd.
   
CHEMICAL TREATMENT PLANT Paterson Engineering Co., Ltd.
Sub- Contractors:
   Mixing Tanks James Day Sheet Metal Workers, Ltd.
   Electrical Equipment Lancashire Dynamo Electronic Products, Ltd.
   pH Equipment Cambridge Instrument Co., Ltd.
   
TANKS Horseley Bridge & Thomas Piggot, Ltd.
Sub- Contractors:
   Remote Water Level Indicators Evershed & Vignoles, Ltd.
   Audible Electric Alarms Evershed & Vignoles, Ltd.
   Tank Panel Evershed & Vignoles, Ltd.
   
TURBINE HOUSE CRANE Sir Wm. Arrol & Co. Ltd.
Sub- Contractors:
   Hoisting Ropes British Ropes, Ltd.
   Motors English Electric Co., Ltd.
   
VACUUM CLEANING PLANT B.V.C. Industrial Construction, Ltd.
Sub- Contractors:
   Motors Lancashire Dynamo and Crypto, Ltd.
   Filter Container Braby & Co., Ltd.
   
STATION COMPRESSOR Ingersoll Rand Co., Ltd.
   
WORKSHOP EQUIPMENT The Selson Machine Tool Co., Ltd.
   
TWO DIESEL SHUNTING LOCOMOTIVES John Fowler, Ltd.
   
AUXILIARY CRANES Wharton Crane and Hoist Co., Ltd.
   
AUXILIARY PUMPS Worthington Simpson, Ltd
 

ELECTRICAL PLANT

 

MAIN SWITCHGEAR English Electric Co., Ltd.
   
AUXILIARY SWITCHGEAR English Electric Co., Ltd.
Sub- Contractor:
Contactor Switchgear, Ltd.
   
GENERATOR TRANSFORMERS General Electric Co., Ltd.
   
STATION TRANSFORMERS English Electric Co., Ltd.
   
AUXILIARY TRANSFORMERS Bonar Long & Co., Ltd.
   
CABLING British Insulated Callender Cables, Ltd.
   
BATTERIES & RECTIFIERS Chloride Batteries, Ltd.
   
LIGHTING AND HEATING Geo. E. Taylor & Co. (London), Ltd.
   
TELEPHONES
Standard Telephone Co., Ltd.
Communication Systems, Ltd.
   
MULSIFYRE EQUIPMENT Mather & Platt, Ltd.
132kV SUBSTATION
   
CIVIL A. Monk & Co., Ltd.
   
132 kV SWITCHGEAR English Electric Co., Ltd.
   
132 kV CABLES British Insulated Callender Cables, Ltd.
   
132 kV LINES Watshams, Ltd.
   
LIGHTING AND HEATING INSTALLATION Thomas Wood & Son (Chester), Ltd.
 

DUAL FIRING CONVERSION CONTRACTORS

 

PLANT
   
MODIFICATIONS TO THE MAIN BOILERS International Combustion, Ltd.
Sub- Contractors:
   Pumps Mirrlees (Engineers), Ltd.
   Control Electroflo Meters, Ltd.
   
TRANSFER PUMPS Mirrlees (Engineers), Ltd.
   
PIPEWORK EXTERIOR TO THE BOILER HOUSE Babcock & Wilcox, Ltd.
   
AUXILIARY BOILERS Babcock & Wilcox, Ltd. Edwin Danks & Co. (Oldbury), Ltd.
Sub- Contractors:
   Control Bailey Meters & Controls, Ltd.
   Oil Burning Equipment Hamworthy Engineering Co., Ltd.
   Oil Storage Tanks Whessoe, Ltd.
   
CIVIL
   
CONSULTANTS Rendel, Palmer & Tritton
   
   
TANKS AND OTHER FOUNDATIONS AND AUXILIARY BOILER HOUSE J. L. Kier & Co., Ltd.
   
STRUCTURAL STEELWORK Ed. Wood & Co., Ltd.
   
ELECTRICAL
   
SWITCHGEAR Castle Fuse & Eng. Co., Ltd.
   
CABLING AND LIGHTING Geo. E. Taylor & Co. (London), Ltd.

Original Printing by the Central Electricity Authority

Trafalgar Buildings, London, S.W. 1.

by Brownlee Printing, London.

P.S.B. 153        9/10/57