Document YGRgypoQ0D0OQn7BKOo3XQeN

WORK PKACIUI CON HUMS OSIIA u:i S TAN I i.M'.i1 1 1 10u AURAS The purpose of the vinyl reactors is to convert \ inyl chloride monoiiicr into polyvinyl chloride resin ( PTC). Severn l ('I t tie operator funclious in the large reactor ;nv,i c;m result in YCM exposure. I he following relates to those work practices which are affected be potential ViAl emissions, A. Opening Manhead on 1 .nipty Reactor 1. Cheek the external pres sure gauge to insure that the reactor is not under pressure. <2. Put on the continuous l ion fresh air breathing mash. a. Unlatch the manhead roll bar. 1. Radio panel operntor to open evacuation jet to the reactor.- This will move air inward and disperse YCfl vapors. a. Open manhead completely, o. Inspect reactor. N01I.: 1 lie manhead is not opened alder ever)' rear t ion hut only periodically to check the internal condition. II. Manual Reactor P.ntry 1. Open manhead using the procedure described in A. 2. follow equipment entry procedure as described in Attachment ''A" of Safety and Health Manual. 3. Close the top manhead. 1. Hydrostatically test' reactor for leakage. C.. Reactor Recover)' Unreactod YUM is removed from the po 1 vine r i .'a t i on reactor slurry by the recover)' system. the recovery system consists of vacuum pumps, compressors and condensers which remove the YCM from the reactor, compress, and condense it so that it can he recycled to the process. Operating personnel DTH 000000301 Rl Af 11li?_ ART. VS - CON 1 I .MILD C. Reactor Ri'rovei')' - Con l j mini arc required in the rceoverv area diiriiu; system start up and for periodic checks durim; t lie recovery. 'I lie recover}1 area is monitored for \VM levels from the f.out. rol Room. The operator is alerted hy radio before entering tlie area if the Yf.M level is above l.n ppm. D. Reactor lUnnj' i m; Puinpinp of the reactor slurry (recurs at the end of the Yf.M strippim; operation. the operator r>hse rv i in; the dual]' dr>es not need to rear a CITYI under normal vondit ion. This area is monitored from the eon in'I roo-a and the operator is notified if the YCI level is above 1 , t) ppm. Abnormal conditions requiviiu.; a i I t AM are: 1. blurred reactor dump valve or line. 2. bump ini; a coarse batch. T. Clean ini; dump Sweeo. 1. Inoperative Sweeo exhauster. IT filter Cleaniny, Removal and Re_p 1 acumen t the following, information applies to the: Recovered Yt.M Filters Fresh VlTl )' i 11 e rs Seal hater Filters (Compressors I these Filters come in contact with Yi M and therefore are potential exposure sources. The filter pack is steam purged and recovered to the process. The recovery system pulls a vacuum on the filter pack prior to opcnini;. Ihe operator tlnni puts on a CHAM, impervious plows and an impervious suit, IT Condenser. Suheooler, Fine and Yessel Maintenance Tiie followini; precautions are required to prevent Yf.M exposure while performim; maintenance on lines, vessels, suheooler aivd condensers. DTH 000000802 I:. Condenser , SubcooJje r_,Id no ;iml Vesso 1 Mn i n t cnanc r - tlon t i lUled 1. Tlil* equipment must bo blinded ;it ;i 1 1 inlols and out lets.. 2. 'Ibo unit is to bo flushed or evacuated until I roe of \CM as detected by the IINU OVA i nst rumeiH . (1. Ihe reactor ope rati nr. area and lank farm are or 11 1 nuous1v monitored for hiph VCM conceit t rat i ons by the lloi teyc.ell unit located in the reactor control room. DTH 000000603 r i| J ` ' 'v ' l'' / f. r rs / ytt .. / // -/ S/ / '/ t DTH 000000604 // 7 DTH 000000605 / d:jf 'jion; / / DTH 000000606 DTH 0000006C7