Document zoa2Gv5Nd126LNBJ5zwx9qvag

DOW CHEMICAL U.S.A July 11, 1991 LOUISIANA DIVISION P. O. BOX 160 PLAQUEMINE. LOUISIANA 70706-0160 604 380-8000 E. BAHRY B. BAILEY S. MILLIGAN R. PEEBLES C. TROXCLAIR D. WALTERS C. WEBER 3701 3301W 3701 5601 3601 5601 f 5601 SUBJECT: CELL SERVICE UPGRADE OF GAS TURBINE EQUIPMENT AND PROCEDURES TO HANDLE POTENTIAL HAZARD CAUSED BY UNBURNED FUEL. THE DOUBLE-BLOCK-AND-BLEED SYSTEM INSTALLATION ON THE FUEL GAS SUPPLY TO EACH TURBINE IS UNDERWAY. THE VALVES WILL BE AUTOMATICALLY ACTUATED AND WILL BE LOCATED AS NEAR AS IS PRACTICAL TO THE TURBINE. A COPPUS BLOWER WILL BE INSTALLED TO DISCHARGE AMBIENT AIR THROUGH 18 INCH BUTTERFLY VALVES INTO EACH TURBINE EXHAUST. THE BLOWER IS AIR DRIVEN AND WILL PROVIDE (5) VOLUME TURNOVERS WITHIN ABOUT FIVE (5) MINUTES. THE BLOWER AND VALVES WILL BE MANUALLY ACTUATED. PROCEDURES WILL BE UPDATED TO INCLUDE PROPER USAGE OF THE ABOVE EQUIPMENT. PLEASE CONTACT ME IF YOU HAVE ANY QUESTIONS, COMMENTS OR IF YOU FEEL THE GROUP SHOULD REASSEMBLE AND REVIEW THIS. CONTACT ME BY 7/22/91. 'JOHN LEWIS CELL SERVICE EXT. 6170 ATTACHMENT 00 Co NF * o??494 TFNTTAl FUEL GAS C.ONF TD F N T T GT-501B CATHODE OVEN OVEN BLOWER