Document rBv0LmyXdmX1RD47bJp5eD6we

Page 1 of 3 Per-Tri Dowthem Furnace Startup STANDARD OPERATING PROCEDURE rev. 4/89 REACTOR AREAS Per-Tri Dowtherm Furnace Startup CHECK ACTION STEPS (All Caps) COMMENTS (Below steps) THE OPERATOR IS REQUIRED TO INITIAL EACH ITEM AS DONE IN THE SEQUENCE SHOWN. 1. PAD THE REACTOR TO BE HEATED UP BETWEEN 80-90// NITROGEN PRESSURE. 2. CHECK TO SEE THAT STEAM DRUM FOR THAT REACTOR IS IN SERVICE AND HAS A GOOD CONDENSATE LEVEL. 3. UNBLOCK SNUFFING STEAM EXCEPT FOR MANUAL LOADING STATION. 4. IF MAIN BURNER IS TO BE LIT, LINE UP DOWTHERM RECIRCULATION PUMPS TO REACTOR THAT IS TO BE HEATED UP. IF MAIN BURNER IS NOT TO BE STARTED, LEAVE VALVES BLOCKED UNTIL YOU ARE READY TO START PUMPS AND LIGHT MAIN BURNER. 5. OPEN INLET AND OUTLET VALVES AT FURNACE WITH MANUAL LOADING STATION. 6. START DOWTHERM CIRCULATION PUMPS AND INSURE MINIMUM DOWTHERM FLOW (270 GPM) HAS BEEN ESTA BLISHED IN FURNACE TUBES BY CHECKING RECEIVER GAUGE AT THE FIRETRON CONTROL PANEL. IF MAIN BURNER IS NOT GOING TO BE STARTED, LEAVE PUMPS DOWN UNTIL JUST BEFORE LIGHTING MAIN BURNER. 7. CHECK TO SEE THAT THE PILOT GAS GLOBE VALVE, MAIN BURNER FACTORY MUTUAL PLUGCOCK VALVE, AND BOTH MAIN GAS MAXON VALVES ARE IN THE POSITION. A<. Ot*er t -ct Co'* S\lb3eC 8. PUT THE NATURAL GAS PRESSURE R|GUjLATt)R ^TN^SER-91"1 RXSOP19 SL 021175 Page 2 of 3 Per-Tri Dowtherra Furnace Startup VICE. 9. ACTIVATE THE FIRETRON CONTROL PANEL BY PLACING BOTH THE MANUAL SHUTDOWN SWITCHES (ONE ON FIRETRON PANEL S-l AND THE ONE ON CONTROL ROOM PANEL SDS-230) IN THE "ON" POSITION. BOTH SWITCHES SHOULD BE NORMALLY IN THE "ON" POSITION TO KEEP POWER ON FIREYE AMPLIFIER AND HEAT LAMP L3 TO KEEP PANEL DRY. 10. ACTIVATE THE FURNACE PURGE CYCLE BY DEPRESSING THE "START PURGE CYCLE" SWITCH ON FIRETRON PANEL. THE PURGE CYCLE (SET FOR TWO MINUTES) IS COMPLETE WHEN "PURGE COMPLETE" LIGHT COMES ON. (IF "PURGE COMPLETE" LIGHT DOES NOT COME ON, CHECK TROUBLE-SHOOTING GUIDE.) 11. CHECK THE ATMOSPHERE INSIDE BOTTOM OF FURNACE (AT BURNER ASSEMBLY) WITH AN EXPLOSION METER TO ASSURE THAT NO RESIDUAL COMBUSTIBLE GASES ARE INSIDE THE HEATER. 12. LIGHT THE PILOT BURNER BY FIRST OPENING GLOBE VALVE IN GAS LINE, THEN DEPRESSING THE "PILOT START" SWITCH ON THE FIRETRON PANEL. a. This switch opens the solenoid valve in the pilot gas line and energizes the spark plug which ignites the pilot burner. The "pilot on" light comes on. b. When the fireye detects a flame, the voltage meter in the Firetron panel will show voltage. At this time, pilot has been successfully it and at this time, "pilot on" switch can be released. The "start" light LI will come on. (If pilot does not ignite, see trouble-shooting guide.) 13. VISUALLY INSPECT THE PILOT FLAME TO ASSURE IT IS PROPERLY ADJUSTED. THE PILOT WILL BURN INDEFINITELY AT THIS POINT, UNLESS "STOP" BUTTON S-3 IS PUSHED OR MAIN BURNER IS LIT. RXS0P19 som" SfiS'rSS"TM; C0WPII?3KTIAl*S otdr strictsublet-to court o'i4th SL 021176 Page 3 of 3 Per-Tri Dowtherm Furnace Startup AND THE HEATER IS READY FOR THE MAIN BURNER. (BE SURE THAT DOWTHERM RECIRCULATION PUMPS HAVE BEEN LINED UP AND STARTED.) 15. THE CONTROL ROOM OPERATOR WILL PLACE THE DOW THERM HEATER TEMPERATURE CONTROLLER IN THE MANUAL POSITION AND SET OUTPUT SIGNAL AT 4 TO 6 PSIG. INSURE THAT CONTROLLER IS IN MANUAL POSITION. 16. DEPRESS THE "MAIN BURNER START" SWITCH ON THE FIRETRON PANEL. THIS CLOSES VENT VALVE SV-216 AND PUTS POWER TO MAXON VALVES MV-217 AND MV218. IT ALSO RESETS PURGE TIMER Tl. 17. OPEN BOTH MAXON VALVES. a. This supplies natural gas pressure to low gas pressure switch PS-208. b. Starts 30 second pilot timer (after 30 seconds, solenoid valve to pilot will close). c. Supplies power to flame failure alarm. 18. AFTER BOTH MAXON VALVES ARE OPENED, SLOWLY OPEN PLUGCOCK VALVE ALLOWING PILOT FLAME TO IGNITE MAIN BURNER. IF A FLAME IS ESTABLISHED ON MAIN BURNER WHEN PILOT TIMES OUT THE FIREYE WILL CONTINUE TO SEE A FLAME. 19. IF LIGHTING OF THE MAIN BURNER IS NOT ACCOM PLISHED, STEPS 9 THROUGH 15 WILL HAVE TO BE REPEATED. 20. VISUALLY INSPECT MAIN BURNER FLAME AND INFORM OPERATOR THAT BURNER IS LIT AND HEATUP MAY BEGIN. The temperature controller should remain in the manual position and gas slowly increase for heatup. SL 021177