Document Y9bzKx02JpEwKB35NpRMRB40K

PRACTICAL IDEAS...here's the trading post for SHVB O.ONICA, Amcht* S^toe Keep Your Coffee Hot Corate stays right temperature if you keep coffee pot on a steam trap. H Holcomoe Los Alamos, N. M. Finding Condenser Air Leaks by Easy Method Findinc condenser air leaks comes up often, and locating exact trouble spot can take s long time. This fast method works well for checking turbine gland seola and other points in areas that can not he visually observed. We used s Pre*l-0-Lile halide de tector. This is a small burner arranged to pull primary combustion air through a tube and into burner. Flame is a pale blue if only air.is. pulled into burner through suction hose. H small amounta of vapor from carbon tetrachloride en- - ter suction tube, flame turns green. Torch was developed to detect leaks in refrigerating equipment using organic halides as refrigerant. But aince these materials are not always available around a power plant we tried carbon let. Vapors from this liquid color flame. Find condenser air leaks by placing burner where (1) it burns with s small, How Good Charging Methods, Maintenance Stretch Battery Life steady flame (2) suction hose can be pieced inside exhaust air line from afier-eondenser on air ejectors or vac- - Lire record of 62-eell battery Installed in 191ft--35 years ago---in Blue Island, 111. station of Public Service Co of Northern Illinois, shown how good charging methods and maintenance can stretch battery life. First 12 years, this battery was re charged by "cycle charge" method rec ommended at that time. Beginning In 1930,.battery has been charged by "float charging," preferred at pretent. Since Installation, battery has re ceived a 4-step maintenance inspection: (1) Voltage of eneh oell Is checked every three months. (2) Over all volt age of entire battery is checked daily. (3) Periodic check U made of panel meter against a ataadard meter. (4) Specific gravity of each cell is checked monthly. Written record is kept of all points checked. Deviations from norma! are easily caught and remedies immediately made. Cell repairs are also recorded. For instance, repair records show that in first 15 years, 96 separator repairs were made. This (a one separator re pair per cell, every ten years. Ever Expanding Ball Bearing aSketches show quick way to heat ball bearing before expanding on a shaft- First, take a short piece of pipe that fits inside ball bearing. Then stand pipa on and on a brick and heat pipe with torch. Slip ball bearing down over pipe so it also rests on the brick. Heat radiating from pipe expands beating. It U then slipped in place over shaft. II C Poolct Wilmington, Del. since the float-charging method hu been? in use, there's been s sharp decline lb" number of repairs. Battery Is used for oil-clrcuiL-breaker^ control, power for indicating lights and/ emergency lighting. Teat in 1941 re-"/' ^'Turning Down Generator's Shaft Ends in Place vested that battery gave belter thaa`>r,^|(.i-'^; 100% capacity, oloo that only one showed any deviation from normal---^W^.Downc turbine inspection and repair but not until eod of discharge period.^* >ppeerriiods, we hod to renew bearing-ring Maintenance department reported m*SjLg Amenta that support flexible coupling 1942 that battery would, give ten nmoorrs<..v^|l,i ^(th1 e shaft ends of the turbine and years of service. It't still going strong. ^jiyk-'^lsnerBtor. Courtesy. Could National Sotlerltt, //j"L-f''-S;ymifli/d:jri;Af'(lt"e'r o0,icdl see removed end ""ijy^pcw installed, we had to turn down new n .. T. in.wgs t--o -s-i-z--e-. T- h--is- c--alled for some kind turning device to turn turbine and ; iftneraior shafts, as well as a cutting- moved from generator shaft for ropaira, end this made It quite easy to (urn shaft. On steam end, emergency governor was removed from shaft end and a pul ley fastened by holts. We used boh holes that bolted emergency governor assembly lo end.of turbine shaft. This work was done on a 25,000-kva tur bine generator which runs like new. Moke Paper Work Easy ag v^?Trig to turn rings to sisc. ^'tffPhoiogropha show how we rigged i E F. Smith Clarks Summit, Pa. .JCuvg who think paper work is labor,' as I do, should make graphs to speed (l&rir-hoiit motor to turn rings down on f generotor shaft. They also show jj^compound rcat bolted to inside of center this unpleasant chore. Plot manometer L reading against gas flow, for example j^hjwing pedestal to hold cutting tool (or /v-turning rings to site. Dial Indicator was --and gaWlow or steam-flow efficiency. If an operator can figura quickly iutt what he is doing, he Is more apt to do $vj3,_l';.yr^'y,fjhtwindintog check shaft movement segmen! ring#. while ma- his best. We hove good luck with this 'urn rings down on tutbinc end visual method of speeding work. .J* ^*lt. same turning rig was used. On H Hoicouat Los Alamos. N. M- ftviterator end, cxciier armature was re- For Clean Drawings Tib tour sanding board end to a 3-fi piece of string, tacked to side of draft ing table. Then It will always be bandy, and your drawings won't get smudged with pencil carbon dust. Eo Ectcent New York, N. Y. uum-pump discharge line. If used for first time, test to observe reaction of flame when carbon tetrs. chloride vapor is present in air entering suction tube. A tow drops of carbon let may be added through the vacuum- breaker valve. After a few seconds, flame on' lamp shows a greenish color. After this experiment, use a pint, sire pump all-can to pump carbon tot on any joint or sea) to be tested. With suction tube of detector in oir-exhauja line, pump s few drops of carbon Un on a suspected point. Then observe':; detector flame for 30 or 40 seconds. Creenish discoloration In flame tells carbon-tet vapors are present in air eky. haust of ejectors. If carbon let Is con fined lo a small area or a tingle eon- ' nection, you can almost pinpoint a leak. Make double check hy waiting for flame to dear. Then use another carbon-tet shot on same area. Remember, carbon-tet vapors are toxic. Never use unless place is.well ventilated. Continued exposure to v#. port is dangerous. Brief persons using this materiel so testing fs safe- P H Renfore Dorger, Texas (Continued on page 150) awr operation and maintenance section `OCTOBER 1052 PLANT OPERATION ANO MAINTENANCE SECTION