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PLAINTIFF'S EXHIBIT Pu rchaser's Identification: der No. NY-77l602 Spec. No. PSCC-C2-102-SG Date of Spec. October 1, 1958 Revision Dates: R1 August l4, 1959 R2 R3 EBASCO SPECIFICATION SPECIFICATION EBASCO 56-50 STEAM-GENERATING UNITS AND ACCESSORIES :-;c RATING COMPANY PUBLIC SERVICE COMPANY OF COLORADO____________________ STATION CHEROKEE STEAM ELECTRIC STATION PROJECT 1959 - HO OOP KW EXTENSIONuN I T NO. 2 LOCATION DENVER, COLORADO (l mile north of city limits) SELLER fev. ^i Ri Prepared by: Reviewed by: Pages Affected: EBASCO SERVICES INCORPORATED fncri ncr Deuflrt.meat WAD00073 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 INDEX 1. Scope.......................................................................... 2. Current Project ................................................... 3. Standards ................................................................. 4. Capability ............................................................. Page 1 1 2 2 DESIGN DATA 5. Design Conditions ............................................... 6. Fuel Data ................................................................. 7- Specific Performance ...................................... 8. Expected Performance ..................................... 9* Tests ... ............................................................. 2,3,4 & 5 5&6 6, 7 & 8 9,10,11,12 & 13 14 CONSTRUCTION FEATURES 10. General ...................................................................... 11. Boiler Drums ........................................................ 12. Boiler Tubes ........................................................ 13- Soot Blowers ........................................................ l4. Steam Washer ........................................................ 15- Water Columns ........................................................ l6. Furnace Wall Construction ............................ 17- Superheater ............................................................. 18. Reheater ................................................................. 19- Steam Temperature Control ............................ 20. Tube Joints ............................................................. 21. Economizer ............................................................. 22. Airheater .................................................................. 23- Airheater Steam Coils ...................................... 24. Pulverized Coal Burners ................................. 25- Primary Air Data ............................................... 26. Gas Burners ............................................................. 27. Ignition System .................................................... 14 & 15 16 & 17 17 17,18 & 19 20 20 21 & 22 22,23 & 24 24 & 25 25,26,27 & 28 28 28 & 29 29 & 30 30 & 31 31 31 8c 32 32 & 33 33 & 34 -1 WAD00074 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 28. Dust Separator.................................................................................................. 34 & 35 29. Setting................................................................................................................ 35,36 & 37 30. Forced Draft Fans......................................................................................... 37,38 & 39 31. Induced Draft Fans.........................................................................................39 & 40 32. Gas Recirculation Fan............................................................................... 40,4l & 42 33- Duct Work.......................................................................................................... 42 & 43 34. Structural and Supporting Steel ........................................................ 43,44,45,46, 47 & 48 35- Piping Valves and Fittings........................................................ .... 48,49,50 & 51 36. Instrument Connections ................................................................................52 & 53 37- Painting .................. ............................................................................................ 53 & 54 38. Sole Plates.................................... ......................................... .......................54 39" Weights........................................................................................................... . 54 40. Water Contents.................................................................................................. 55 41. Manufacturer's Data Reports and Certificates ....... 55 42. Drawings................................................................................................................ 55 43- Shipping Protection ................................................................................... 55 44. Nameplates........................................................................................................... 55 45. Tools..................................... ...............................................................................56 ii WAD00075 Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES 1 This specification covers performance and construction features of steam-generating unit and certain accessories. It is not the intent completely to specify all details of design and construction of equipment; however equipment shall conform in all respects to high standards of engineer ing, design and workmanship. Complete steam-generating unit and specified accessories shall be delivered with supervision of erection and shall be demonstrated capable of performing in continuous commercial operation up to Seller's guarantees and in a manner acceptable to Purchaser. 2 Date October 1, 1958 Operating Company Public Service Company of Colorado StationCherokee Steam Electric Station Situated at Denver, Colorado (l mile north of city limits) Turbine Unit No. 2 Rating 110 000 kw Designation Steam-Generating Unit No. ___________ 2 Elevation above sea level 9130 ft Weather Conditions medium snowfall, medium high winds and sub zero temperatures in winter; light yearly rainfall Inspection by Hartford Steam Boiler Inspection & Insurance Company .1 Principal fuel is pulverized Colorado sub-bituminous (lignite); natural gas as secondary fuel. SCOPE CURRENT PROJECT .2 Steam generator shall be installed with respect to pro tection from weather, as follows: a Boiler Outdoors__________ b Economizer Outdoors__________ c Air-heater Outdoors__________ d Forced-draft fans Outdoors (in louvered enclosure) e Induced-draft fans Outdoors__________ f Dust Separator (Mechanical) Outdoors (in louvered enclosure) g Dust Separator (Future Electrical) Outdoors 1- - WAD00076 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 3 Steam-generating unit and accessories shall comply with applicable specifications and codes (latest revision) of American Standards Association, American Society for Testing Materials, American Society of Mechanical Engineers and National Board of Fire Underwriters. Construction shall comply with laws of State where equipment is installed, and with any local ordinances, as may be required. 4 Capability of each steam-generating unit shall be: a Maximum rate of heat absorption 1,004,000 b Maximum continuous steam output 8$2 000 kB per hr lb per hr STANDARDS CAPABILITY DESIGN DATA 5 Steam-generating unit shall be of type indicated and shall be designed for operating conditions as follows: DESIGN CONDITIONS a Type and design reheat, radiant, single drum, divided suction furnace, top fired, outdoor with enclosed Firing Aisle Level b Design boiler drum pressure1729psig c Design steam pressure at superheater outlet 1950 psig d Steam temperature at superheateroutlet 1005 F for range of 650 000 to 852 000 lb per hr (with principal fuel) and for range of 650 000 to 852 000 lb per hr (with secondary fuel) e Feed water temperature at maximum output 500 F f Total solids at maximum output (basis of performance) In feed water 15 ppm In boiler water(_____$ alkalinity of solids) 1000 ppm In steam leaving boiler drum 1 ppm g Type of firing (principal fuel) vertical firing down ward through roof of furnace h Type of firing (secondary fuel) vertical firing down ward through roof of furnace i Ambient air temperature minimum -20 F, maximum 90 F, design 80 F 2 WAD00077 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August 14-, 1959 j Air required for combustion (with principal fuel) 26.5# excess leaving economizer k Forced-draft fan capacity margin required: 132# head, 115# volume in excess of requirements 85O 000 lb steam per hr, with pulverized lignite firing as designated by Seller at 26.5 excess air 1 Induced-draft fan capacity margin required 132 # head, 115# volume in excess of requirements at 8$2 000 lb steam per hr, with pulverized lignite firing as designated by Seller at 26.9# excess air m Draft in furnace 0.9in. water n Minimum draft in setting 0.1in. water *0 Saturated steam for auxiliaries 8.0# at all loads p Rate of heat liberation at 8^2 000lb/hr output and pulverized lignite firing: Per cu ft furnace volume 14,300 Btu/hr Per sq ft projected water-wall surface 49; 800 h.u/hr q Special design features shall be as follows: 1) Unit shall be capable of maximum continuous output with increased reheat flow (775 000 lb/hr) with a feed water temperature entering economizer of 444f, resulting from removal of top high pressure heaters from the extraction cycle. 2) Boiler steel shall be designed to take wind loading of Purchaser's adjacent structure (turbine room and bunkers). In addition, boiler steel shall be designed for loads of louvered wall Forced Draft Fan enclosure (By Purchaser), solid wall firing aisle enclosure, piping loads from Purchaser's main steam, reheat steam and boiler feed discharge systems and wind load of ad jacent elevator structure. 3) Single connections shall be provided for Purchaser's main steam, hot reheat steam, cold reheat steam and boiler feed discharge piping. All extraction feed water heaters must be in service. DESIGN CONDITIONS (Cont'd) -3- WAD00078 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 Enclosure shall be provided for the firing aisle, complete DESIGN with access doors, windows, working area, etc. Weatherproof CONDITIONS skin tight enclosure shall be provided for each end of the (Cont'd) steam drum. Connections for all safety valves, including Power Control Valve, shall be furnished on boiler headers or piping. Provision shall be made for air flow measurement device. Provision shall be made for shielding ash in the hoppers from direct furnace radiation. Provision shall be made in the flue gas ducting for future installation of an electrostatic dust separator ahead of the Induced Draft Fans. All piping nozzles shall have sufficient length to permit rewelding. All safety valves shall be of the weld end type (this does not include Power Control Valve). Flues and ducts shall be insulated. Heat insulation shall be apoli-^ external.lv on flues and ducts carrying gas anc. hot air. The Forced and Induced Draft Fans shall be designed so that one fan of each service may be used up to approximately 60 per cent of maximum continuous superheated steam output. Time required for complete automatic sequential soot blowing cycle, when burning pulverized lignite, will not exceed 7 hrs. Minimum stable operation with all coal burners and pulverizers in operation is lb/hr superheated steam output. Emergency temperature control shall be provided by means of spray desuperheaters in the boiler superheater piping between the primary outlet and secondary inlet headers and in the reheat piping before the reheater inlet. Normal sources of the spray water shall be boiler feed pump discharge for superheater desu perheater and shell drains from 6th stage extraction feed water heater for reheater desuperheater. Alternate source of water for the reheater desuperheater will be boiler feed pump discharge. Spray system may not be used to demonstrate performance guaran tees. Spray system will, however, be permitted to operate if necessary to achieve maximum continuous superheater output with top high pressure heater removed from the extraction cycle. -4 - WAD00079 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 17) Fans shall be designed to provide a minimum margin of 15 per cent on capacity and 32 per cent on pressure. Some portion of these margins may be used to achieve maximum continuous superheater output with top high pressure heater removed from the extraction cycle. Fans shall be of Sturtevant TV-10 design and shall be complete with control levers for vanes and dampers, for connection to Purchaser's control drives located at grade. All fans shall have air cooled bearings. Gas recirculating fans shall be located at grade with its suction on the discharge side of the dust collector, recirculating cold gas. Fans shall not be released for production until details of design and fabrication have been reviewed and agreed upon by Purchaser. DESIGN CONDITIONS (Cont'd) 6 Steam-generating unit shall be fired with sub-bituminous (lignite) of characteristics as given below: FUEL DATA .1 a Character Size designation run of mine District Weld County Seam Northern Colorado b Analysis of coal, as supplied from boiler bunker (per cent by weight)* Source Weld County Carbon Hydrogen 55-24 3-08 * $ Oxygen IO.78 * Nitrogen Sulfur 1.14 0.6l * Ash Water Heating value (high) 5-15 24.00 9280 * * Btu/lb Softening temperature of ash Reducing 2090 Ash-fluid temperature * Fuel, on uln.-h u.n ,/o''uaoce and guarantees are based . :5 - F WAD00080 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Reducing Grindability (Hardgrove) 2250 45 F FUEL DATA (Conf1 <1) c Proximate analysis of coal supplied from boiler bunker as fired (per cent by weight) Moisture 24.00 Volatile matter 28.80 i Fixed. Carbon 42.00 t Ash 5.20 $ Total 100.00 i Sulfur (separate) 0.6l * 2 Natural gas (per cent by volume) (dry) Methane 81.0 * Ethane and higher 6.8 * Carbon dioxide 0-3 Ni;t rogen Heating value (high) (dry, at 60F 30-0 in. Hg) 11-9 $ 943 Bbu/cu ft 7 Completed steam-generating unit in operation, shall be guaranteed to meet specific performance requirements, as follows: SPECIFIC PERFORMANCE .1 Steam generator and accessories, when operating with principal fuel under conditions specified in paragraph 5 shall deliver steam at superheater outlet continu ously at an output of 8^2 000 lb per hr, at a gross efficiency of not less than 86.39^ (no tolerance allowed) with 26. yj, excess air for combustion. .2 Steam generator and accessories, when operating with secondary fuel under conditions specified in paragraph 5 shall deliver steam at superheater outlet continu ously at an output of 852 000 lb per hr, at a gross efficiency of not less than 83.23/6 (no tolerance allowed) with 13-0jo excess air for combustion. (This is predicted performance) 3 Steam generator and accessories shall operate through entire range of capacity without undue or injurious vi bration, pulsation or noise. 6- - WAD00081 SPECIFICATION EBASCO STEAM-GENEEATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 .4 Steam and water circulation through boiler, reheater and superheater at all loads shall be such as to prevent "starvation" of supply to and consequent overheating of heat-absorbing surfaces; if inadequate circulation is experienced Seller shall make improvements requisite to provide adequate circulation and demonstrate adequacy of design in this respect. 5 When firing principal fuel, steam shall be produced at the following conditions: a Temperature at superheater outlet shall be automatic ally controlled at 1005F for steam outputs from 650 000 lb per hr to 8^2 000 lb per hr, plus or minus 10F tolerance allowed b Steam leaving boiler drum and before superheater inlet shall contain not more than 1 ppm total solids, for conditions specified in paragraph 5- c Temperature at reheater outlet shall be automatically controlled at 1005F for steam outputs from 6^0 000 to 852 000 lb steam per hr, plus or minus 10F tolerance allowed. .6 Forced- and induced-draft fans shall supply air required for combustion and remove products of combustion, over entire range of output up to and including maximum condi tions specified in paragraph 5, without exceeding power input requirements as specified in paragraph 30-1 and 31.1, when using principal fuel. 7 Under all conditions of steam output it shall be possible to maintain: a Negative pressure in all parts of boiler setting of not less than 0.1 in. of water b Complete combustion in furnace proper, as evidenced by absence of CO or unburned hydrocarbons at entrance to superheater .8 Loss of pressure or draft from resistance in portions of steam generator (readings referred to same level) shall not exceed the following: a Loss of steam pressure through superheater, at flow of 892 000 lb per hr, not to exceed 75 psi-10^ tolerance SPECIFIC PERFORMANCE (Cont'd) -7 - WAD00082 SPECIFICATION EBASCO STEAM-GENERATING UNITS AND ACCESSORIES Purchaser's Identification Spec. No. PSCC-C2-102-SG October 1, 1958 Rev 1 - August l4, 1959 b Loss of draft from furnace to inlet of Induced-Draft Fans, not to exceed 13.0 in. water-10$ tolerance (primary fuel) includes 0-5 in. water allowance for future Elect. Dust Collector. c Loss of air pressure from outlet of Forced-Draft Fans to furnace, not to exceed 12.6 in. water - 10$ tolerance (pulverized lignite fuel) d Loss of steam pressure through reheater, at flow of 852 000 lb per hr, not to exceed 30 psi - 10$ tolerance SPECIFIC PERFORMANCE (Cont'd) -8 - WAD00083 -P a P urchaser's Id e n tific a tio n Spec. 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