Document DpGnk5eZZRb96nMd7qnrLrd4

VCM CONTAINMENT AN UPDATE History Design Features Operation Highlights Benefits and Long Term Results L. LaCorte, FPC Delaware, October 1,1992 CTL015193 OPERATION HIGHLIGHTS Pressure venting is initiated from a pressure sensing device mounted on the vessel f * Actuation is computer controlled * Set-point is locked into the computer * ERV valves tested monthly for actuation * Manual close position is not provided Containment Bullet tanks are in the active cycle of VCM recovery * Surge capacity of 100% * Allows compressors to operate efficiently CTL015196 BENEFITS AND LONG TERM RESULTS 1. Improved Environmental Protection * There has been only one significant VCM release due to equipment failure since 2/10/87 (faulty weld) 2. Improved plant productivity * Reactor stripping process and VCM recovery efficiency has been greatly improved, at least a 27% productivity increase in the reactor areas 3. Reductions in variable cost and maintenance cost* * Savings on electricity, steam, and water * Virtually maintenance free 4. Long Term Benefits * Efficient plant operation * Effective maintenance * Environmental assurance CTL015197 CONTAINMENT yai vafqr PAST VENT HEADER "A" NOTE: EACH BULLET HAS A VOLUME EQUAL TO 62.57. OF THE TOTAL REACTOR VOLUME 8" (8 REACTORS @ 6,000 GALLONS EACH) ____ X VCM VAPOR 3-7 PSIG TO NASH COMPRESSORS CONTAINMENT SYSTEM GAS HOLDER 10" (30,000 GALLONS EACH) LOW PRESSURE SOURCES ARE EITHER VENTED OR PULLED BY VACUUM PUMPS INTO THE BULLETS NORMAL DUTY EMERGENCY DUTY PRESSURIZED GAS HOLDER EOR VCM RECOVERY PRESSURE RELIEF AND COLLECTION OF A POTENTIAL VCM RELEASE TO THE ENVTRCtMNT VCM VAPOR SLOW VENT HEADER INLET - 10" Hg ABS 8' 75 Hp FIRST STAGE SEAL WATER TANK * BOTH BULLETS ARE IN SERVICE AT ALL TIMES * PRESSURE IS NOT ALLOWED TO EXCEED 15 PSIG TO ALLOW ADEQUATE ROCM TOR AN EMERGENCY DISCHARGE (AS PRESSURE APPROACHES 15 PSIG, ALL FEEDS ARE SHUT OFF EXCEPT EMERGENCY EARLY RELIEF) FIRST STAGE SEAL WATER OOOLER ( 2 REQUIRED @ 2.5 EM BTU EACH) NASH VACUUM PUMP ( 3 REQUIRED @ 1,000 ACFM EACH) NORMAL DUTY " 2 PUMPS IN OPERATION (STOPPED/STARTED AUTOMATICALLY) 10 PSIG @ 80 F SEAL WATER TRANSFER PUMP ( 2 REQUIRED @ 60 GPM/80 FEET HEAD EACH) CTL015199 i