Lon D Wright Power Plant Unit # 8 Boiler Chemical Cleaning

2026-11-03

The Contractor shall provide the materials and labor as herein specified for a complete chemical cleaning of the furnace water wall tubes and headers and the economizer tubes and headers of Unit No . 8 675 , 000 pph boiler . The following is a general description of the work which shall be included but not limited to as a part of this Contract . 1 . 3 . 1 Obtain necessary dimensions and data during the site visit ( s ). 1 . 3 . 2 Provide suitable solvent , inhibitor , passivator and / or other chemicals necessary to chemically clean the boiler in accordance with the best available technology . The Contractor will bring at least 50 % extra chemicals to the site so that a sufficient supply of chemicals is always readily available in the event that deposit levels prove higher than anticipated . 1 . 3 . 3 The tetra ammonium EDTA ( ethylenediaminetetraacetic acid ) cleaning process shall be the basis of the base bid . Another cleaning process may be proposed by the bidder and submitted as an alternate bid . 1 . 3 . 4 No acid cleaning processes shall be permitted . 1 . 3 . 5 No anhydrous ammonia shall be permitted on the power plant site for use by this Contractor . 1 . 3 . 6 Provide all necessary pumping equipment , piping , valves , temporary storage tanks , safety equipment and other appurtenances to inject the chemical solutions into the boiler and recirculate and recover the expended fluids and rinses . 1 . 3 . 7 Provide at least one service supervisor , one chemist and one equipment technician per shift over the entire chemical cleaning periods . 1 . 3 . 8 Provide a detailed chemical clean plan which includes a list of all preparations necessary to accomplish the chemical cleaning with the bid proposal for Owner ' s later approval prior to start of work . 1 . 3 . 9 Monitor the ongoing progress of the cleaning processes and advise Owner ' s Plant Superintendent or designated representative of such progress and any changes in the cleaning process or schedule . A portable analytical laboratory that is fully equipped shall be provided onsite during the boiler chemical clean to monitor pH , chemical concentration and dissolved metals in the cleaning solvent . Include all processes in Contractor ' s Boiler Cleaning Report to be submitted within 30 calendar days after completion of all onsite work . 1 . 3 . 10 Determine when the cleaning is completed and notify Owner ' s Plant Superintendent or designated representative of such status . 1 . 3 . 11 Perform passivation , draining and rinsing of boiler coordinating such efforts with the plant operating supervisors on duty at the time . 1 . 3 . 12 Provide proper disposal of Boiler Chemical Cleaning Waste . 1 . 3 . 13 Accompany Owner ' s Plant Superintendent or designated representative ( s ) during the post cleaning inspection of the boiler . 1 . 3 . 14 Remove all temporary equipment , piping and other such materials except for piping inside the plant which can be effectively utilized , in the opinion of Owner ' s Plant Superintendent during future chemical cleaning of these boilers . Contractor provided piping , valves and appurtenances which shall remain in place shall have pressure / temperature ratings equal to or greater than the existing piping which it is adjoining . All permanently installed valves shall be at least 2 " in size and of suitable pressure class , steel body with butt or socket welding ends as approved by the Owner . 1 . 3 . 15 Provide a written report to the Owner and the Engineer describing the work performed including , but not limited to , the boiler water chemistry at the completion of each cleaning stage , the quantity of each chemical used during each cleaning stage and the total fluid quantity ( gallons ) injected into the boiler for incineration as further described in Paragraph E . 34 for submittal requirements .

Nebraska

2026-04-29