Document NEqX0RMd8pXvzGevjDgEja8BR

c c : ivir. yj. c o u rq u e . / M r. L. G. O liver M r. T. C. C oerver M r. J. F . H am ilton M r. C. B. Hunt . M r. J. C. K lock M r. w . C. S trader M r. H. H . W all PK . n . f . sftZ . X. i r . tfX D trX J M -f& A S TO: M r. J. J. B ergin FROM: ' H. W. Hobgood R. H. Jones J. F. M cE lderry D. E. P ark L . L. Reynolds SU B JEC T: L ead A lkyls A rea - P ro p o sed P ro g ra m | fo r R educing C ontam ination D ecem ber 22, 1966 loCV2 o o o w A p roposed p ro g ram fo r reducing contam ination in the lead alkyls a re a is outlined in th is m em orandum as ag reed upon by, T E L O perations and T E L T echnical S erv ices. Included in th is p ro g ra m a re recom m endations fo r m odificatio ns in equipm ent and p ro c e d u res to reduce the contam ination lev el and p e rso n nel ex p o su re. A lso included a re stu d ies w hich m u st be conducted to b e tte r define specific contam ination so u rc es. . S pecific p ro p o sals and reco m m en d atio n s, as a g re ed , a re liste d below : 1. _ V entilation and H ygiene C onsultant - D r. M elvin W. F ir s t Im plerjient D r. F ir s t's acceptable recom m endations a fte r evaluation. 2. Foxboro "T otal H ydrocarbon A nalyzer" O btain the Foxboro "T o tal H ydrocarbon A nalyzer" (hydrogen flam e ionization carb o n bond d e te c to r) on a re n ta l b a s is to d e te rm in e if it is su ita b le fo r detecting p ro c e ss leak s in the m an u factu rin g b u ild in g s. If it is found to be satisfacto ry fo r this p urpose, buy it and m ake a thorough survey fo r leak s. If th e survey is m ade, additional tech n ical m anpow er m ay be req u ired . This survey w ill not su p ersed e the routine leak checking now being done - by TE L O perations. . 3. E quipm ent F a ilu res N 6334 C ontinue to w ork to red u ce the freq u e n cy of equipm ent fa ilu re s , and im p le m ent a ll c o rre c tiv e action as quickly as p o ssib le. Review m aintenance and op eratin g p ro ced u res and m odify w here n e c e ssa ry to e n s u re 'th a t all . 2 contam inated m a te ria l. Specific item s of im m ed iate co n cern a re : : a . Atagle v a lv es - In s ta ll f la t- f a c e d s e a ts , e s p e c ia lly in T M L s e r v ic e . . O btain m ore a ir sam p les w hen an angle valve is being changed p ro p e rly to e n su re th at the ex istin g p ro c e d u re s a re adequate. b. D ura seals - D eterm in e w h eth er to u se sleev e o r stan d a rd o r J. D. D aigre seals com paring se rv ic e fa c to r w ith exposure during sea l rep lacem en t. O btain a ir sam p les to e sta b lish fa c ts about exposure during seal changes. ` c. C harging h ead plug cocks - O btain a ir sam p les during ch arg in g h ead plug cock rep lacem en t to d e term in e w h eth er th is co n trib u tes to contam ination. , d. plugged drop legs - In stall valves on the drop leg la te ra l plates iijt " C " B u ild in g p e r m a n e n tl y . T h e ty p e a n d s i z e o f th e v a lv e s m u s t b e d eterm in ed . R eplace drop leg s w ith units containing a sp ray ed Teflon lijning w hen re p la c e m e n t of th e e x istin g d ro p le g s b eco m es n e c e s s a ry , l^ean w h ile, continue to s e a rc h fo r a b e tte r lin in g . In sta ll a p e rm a n en t h ig h -p re ssu re w ater h ead er w ith hose connections on the fourth floor fcj>r w a t e r f lu s h in g a n d u n p lu g g in g d r o p l e g s , * e. Sj.ide v alv es - R e p la c e th e e x istin g s lid e .valve s te m p a ck in g w ith T e flo n "'S e lf M o ld " p a c k in g w h ic h h a s p e r f o r m e d s a t i s f a c t o r i l y o n t:wo t e s t u n its in " B " B u ild in g , f. V alves (G eneral) - P ro c e ss valves w hich a re o p erated during ev ery c;y c le - d e v e lo p p a c k in g g la n d le a k s a n d c a u s e c o n ta m in a tio n . A re c o rd o f v a lv e f a i l u r e s i s a tta c h e d a s T a b le I , " V a lv e s R e p a ir e d o r RIe p la c e d o n F o u r th a n d F if th F l o o r s o f " C " B u ild in g d u r in g 1966. " D a ily le a k c h e c k s o f b a ll v a lv e s i n s t a l l e d a t C - 2 a u to c la v e h a v e " -, d is c lo se d no le a k s sin c e th e te s t b eg an m o re th a n fiv e m o n th s ago. The te s t included b all valves in the follow ing se rv ic e s: (1) M eC l sc a le tan k vent. . {) N itro g e n to s c a le ta n k . (3) M eCl sca le tank p r e s s u r e gage. ( jl) M eC l s c a le ta n k v a p o r l in e m a in b lo c k . (5) M eCl ta k e-u p lin e a t sc a le tank. (S) M e C l f e e d lin e . a t; s c a l e ta n k . . .. r_ "... (7) M eCl r e a r feed. .3 MeCl feed d ia p h ra g m valve b y p a ss. (9) C h arg in g v en t. :: . (10) P rim a ry vent. . It is th e re fo re recom m ended th at the follow ing valves in "C " B uilding, a ll of w hich a re o p erated ev ery cy cle, be re p la ce d w ith b ^ll valves on a step w ise schedule in the follow ing o rd e r of p rio rity : - - f `r ~ . ' f t ; x rv " M eCl re a r feed and M eCl feed line at scale tank. c` > 1 <lfv (2) - Ctr I- V - f P rim a ry vent. (3) M eC l ta k e -u p lin e a t s c a le tan k . eiv-: - It is fu rth e r recom m ended th at the follow ing valves also / be changed pending fu rth e r evaluation of th e ir p e rfo rm an c e w hile the aforem entioned valves a re being replaced: (1) C harging vent. * (2) M eC l sc a le tan k vent. 6 In th e m ean tim e, the p re s e n t valves in th e n itro g en lin es to the sca le tan k s should be checked to en su re th a t they a re in sta lled in such a w ay th a t n itro g en p re s s u re ra th e r th an s c a le tank p r e s s u r e is ap p lied to th e stea m packing w hen the valves a re closed. S im ilarly , the p re se n t M eC l scale tank vent valves should be checked to see th at the packing is exposed to the d o w n stream p re s s u re ra th e r th an sc a le tank p re s s u re w hen the valves a re closed. / 4 . A lloy H oppers D eterm in e w h eth er the con tam in atio n fro m the h o p p ers a s in d ic a te d b y th e h ig h le a d a n a l y s e s in ,?C " B u ild in g e l e v a t o r a n d tu n n e l is caused by contam inated vapor fro m em pty hoppers o r by contam ination on the outside surface of the hopper slide valves. S ev eral altern ate solutions exist fo r reducing o r elim inating the contam ination w hich re su lts fro m vapors in sid e the h o p p ers. T h ese a lte rn a te s have " been review ed by T E L O perations and T echnical S erv ices sin ce the la s t contam ination m eeting w as held in N ovem ber. The consensus is th at th ese a lte rn a te s should be evaluated by p lan t te stin g in th e follow ing o rd e r of p rio rity until a sa tisfa c to ry solution is fpund: * 1^ E v acu ate em p ty h o p p e rs to a h ig h v a c u u m to re m o v e c o n ta m in a te d v a p o rs ^ a fte r charging. - 2. In crease the p resen t hopper purge ra te . . ' .4 The p re se n t hopper purge sy stem in nCM B uilding has not reduced th e co n tam in atio n in the e le v a to r and tunnel to accep tab le le v e ls. A co n tro lled evaluation of th is purging sy stem w ill be conducted during w hich an o p eratin g fo rem an w ill clo sely su p e rv ise the purging o p eratio n to en su re that the p ro p e r p ro c e d u re is follow ed. G reasing of the hopper slide valves began N ovem ber 24. H ow ever, the contam ination lev els in nCn B uilding elev a to r and tunnel continue to be v e ry high. 5. O utside A ir C ontam ination - C ontam ination of outside a ir is a m ajo r c o n trib u to r to the co n tam in atio n p ro b le m in sid e th e b u ild in g s. T he m a jo r so u rc e s of th is co n tam in atio n a re b eliev ed to be the co p p er d u cts and fu rn ace pit exhaust ducts. The organic lead content of vent stre a m s at "B " and "C " B uildings has been d eterm in ed as follow s based on continuous sam p les and spot flow m e a su re m e n ts. / ".B " B ld g . TEL, lb/d ay ; "C " Bldg. TM L, lb/day a. Copper duct b. P rim a ry ta ils gas c. Sniff ta ils gas d. F u rn ace pit exhaust e. N orth sum p ' 351 0 .3 0. 1 315 11 736 .- 280 o It should be noted that the lead content of the vent g a se s fro m the north sumpls w as v e ry high. H o w ev er, th e re w as little o r no flow o f th e se g ases into the plenum of the building exhaust fans indicating th at the lev el ' in the p ro c e ss ditches m ay be high. P a st m easu rem en ts have shown th at a fa irly high a ir ra te should e x ist fro m the n o rth sum ps to th e building exhaust fans. The p ro c e ss ditches should be cleaned and in sp ected reg u larly . A ir sam ples w ill be obtained in the vicinity of the north sum p betw een the b u ild in g and the fu rn aces to d e te rm in e w h eth er th is a re a is co n tam in ated . The b rg an ic lead content of. "D " B uilding co p p er duct and th e exhaust ducts fro m the furnace pits at the re m a in d er of the o p eratin g fu rn aces w ill be ' determ ined. 6. T im etable and M anpower R equirem ent . A c a le n d a r tim etab le and m anpow er re q u ire m e n t for. the stu d ies m entioned above is attached as Table II, "T im etab le and M anpow er R eq u irem en t fo r ,: . ^ 00025:4 F u tu re C ontam ination S tu d ie s ." Since th ese stu d ies re q u ire extensive a ir sam pling and subsequent an aly sis by GR&D p erso n n el, the pro jected schedule is g reatly dependent on the p rio rity placed on th is p ro g ram by the A nalytical G roup of CR&D. R H J:jht R. H. Jones 0002515 TABLE I V alves R epaired o r R eplaced on F ourth and Fifth F lo o rs of "C " B uilding D uring 1966* ; 1.. f . V alve Identification \' \ - ' ' ' : ' Feb. N um ber of V alves R epaired o r R M arch A pril M ay June July X 1. M eCl Scale Tank Vent m 2. N itrogen to S cale Tank "*) \3 o 3. $>" ' O ro 4. ox f"***V ' CD 5. 6. M eCl T ake-up Line at Scale Tank 3 M eCl R ear Feed 11 C harging Vent .5 P rim ary Vent .3 0 4. ' 2 4 1 8 0 4 1 9 2 10 2 2 0 . 1 ' .3 -, 9 2 0 4 1 0 0 * B ased on contam ination re p o rts of building su p e rv iso r (excludes angle valves, slid e tank valves, feed d iaphragm valves, sniff diaphragm v aly es, valves in nitrogen lin (overhead) and d ro p le g s, and charging head plug cocks. ** R epacked a ll s c a le tank vent valves on 3 -3 1 -6 6