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<br />- <br /> <br />- ----- <br /> <br />~ <br />-.J <br />.... <br />::n <br /> <br />/ <br /> <br />.~ .(2. <br /> <br />4>~ <br />u,s, Oepartment of the Interior <br />Bureau of Reclamation <br /> <br />~ <br />, <br /> <br />-- <br /> <br />- <br /> <br />'YF <br /> <br />- <br /> <br />- <br /> <br />Salinity Update <br /> <br />Powerplant Cooling <br />Investigations <br /> <br />DISCUSSIOnS are underway With Utah <br />Power and Light tor an InstallatJon and <br />veffllCallOl1 of the saline water cooling lower <br />at Hunter Powerplanl. The binary cooling <br />tower (BeT) at Mcintosh Powerplant In <br />lake/and. Flooda. currently IS the only <br />ronmerciaJ size facility 01 rtS type MIChael B <br />Bessler of the Water Quality Othce and Cass <br />L legal 01 Aquatraln, Inc_ tOUred the cooling <br />system facIlity and revteWed !he design <br />problems reported With the BCT <br />The BeT was bemg dismantled for repairs <br />and replacement of heat trans1er modules <br />When opef8tlng. the BeT at Lakeland <br />provides about 7 percent of the total cooling <br />capacity needed by the 364 MIN coal-hred <br />powerplant Rep.ms and replacements lor <br />the BCT are scheduled to bring the BeT <br />back on line to meet sumrTlef operaling <br />OO'nanas on the plant. <br />BasICally, the OCT serves to concentrate <br />astJ pond effluents which allerage nearly <br />7,rnJ mg;L of total diSSOlved SOlids This <br />wastewater is delivered at a rate of 20) gpm <br />(gallons per minute) 10 the BeT where 192 <br />gpm is evaporated and 8 gpm IS blown down <br />10 an on-Site disposal system Powerplant <br />cooling water dehvered to thIs BCT IS <br />essentially secondary-treated ~age water <br />The design prOblem. as rep:lrted and <br />confirmed by InspectIOn, is a mectlanlCal <br />failure In the heat-€llchanger Mylar heal- <br />eJl:ctlanger Sheets (better descnbed as sealed <br />bags) are separated by a l'fflnch diameter. <br />Sharp-edged, plastIC spacer Apparently, <br />when the BeT was not operating. beCauSe 01 <br />other plant outages, the Wind would cause <br />the vertlCal!y hanging Mylar sheets (bags) to <br />VIbrate freely In the to'Ner In addlliorl. dunng <br />BCT operation. there IS some <br />vibratlOnlmovemer'lt caused by the forced air <br />and thin film walerl1owoverthe MylarSheets <br />The Vibration resulted in abrasIOn and <br />cutting of the Mylar heat-€Jl:Changer Sheets <br />by the p1asllC spacer By running <br />conductIVity tests. 11 was estimated thaI over <br />60 percent 01 the heat transfer modules were <br />leaking because 01 ptnhOle-slZe leall.s or tears <br />ranging up to 2 or 3 Inches In dl8meter <br />Prescnbed repairs and replacements <br />agreed 10 by Lai<.e1and offICials and the BCT <br />manufacturer lnclude <br /> <br />A Quarterly Report on the <br />Colorado River Water Quality <br />Improvement Program <br /> <br />'~T~~!: ~ <br />COLORADO WAn <br />CONSERV^TlON 90A~D <br /> <br />July 1983 <br /> <br />... <br /> <br /> <br />... <br /> <br />- <br /> <br />- <br /> <br /> <br />-.. <br />..- <br />-- <br />-- <br /> <br />/.- <br /> <br />- <br /> <br /> <br />~ <br />