ML20011F472

Operability Evaluation of Salt Svc Water Pump Columns

ML20011F472
Person / Time
Site:	Pilgrim
Issue date:	01/19/1990
From:	BOSTON EDISON CO.
To:
Shared Package
ML20011F445	List: BECO-90-017, Forwards Operability Evaluation Re Salt Svc Water Pumps P208 B,C,D & E,Per 900117 Telcon.Evaluation Concluded That Salt Svc Water Pumps P208 B,C,D & E Operable & Tech Spec 3.5.B.1 Requirements Met ML20011F447 ML20011F472
References
M-410, M-410-R, M-410-R00, NUDOCS 9003060087
Download: ML20011F472 (51)

Text

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• ~ Assumptions are adequately described and are reasonable.

Input or assumptions requiring confirmation are identified, and if any exist, the l calculation has been identified as

• Preliminary" and a "Finaltration Due Date" has been specified.

Design requirements from applicable codes, standards and regulatory documents are I identified and reflected in the design. Applicable construction and operating experience was considered in the design. The calculation number has been preserly obtained and entered. An appropriate design method or computer code was used. A mathematical check has been performed. The output is reasonable compared to the input. ~ Alternate Calculation alternate eticulation (l,,_l including verification of asterisked items noted above. The pages) is attached. Qualificat' ion Testing ~lfordesignfeature including verification of asterisked items nosed above and the following: The test was performed in accordance with written test procedures. o Most adverse design conditions were used in the test. l Scaling laws were established and verified and error analyses were performed, if o applicable. Test acceptance criteria were clearly related to the design calculation. o-9 Test results (documented in ) were reviewed by the calculation Preparer or other cognizant engineer. Independent Verifier Comments: Od tz de A h 3 4e cH f'A4 Le' ~ ie

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See Paragraph 6.1 /S/ s Independtt0 V i f et. Date reparWr concurrence with /5/ B

• I findings and com.ent resolution arer 6r Other Date gnizant Engineer Exhibit 3.06-C Rev. 3

3 v[]v g j Massachusetts Maferlais Research, hx. 1 P.C DOK#10 + 341 WEST 90YLSTON STREET + WEST 90YLSTON, MA 01683

• TEL

' '.) Das January 19, 1990 . Boston Edison company l Pilgrim Nuclear Plant PO NO l Plymouth, MA 02360 i MMR Nei J2912 i Anonncn Ms. Cindy Ruhns Report of tuts Materials. Fractured Bronte Column i The tunsile test results for the column material nearest the fracture j are g. L Ultimate .2% Yield Brinell Strength Strength % Elongation Hardness f es i_) fosi) hE 13000 kg lead) 41 -23,900 21,700 .5 107, 103 1 $2 28,700 26,300 1.3 114, 114 93-28,900 25,900 2.2 107, 112 The. tensile test results for the column material about 2-1/2 feet from the fracture are: f Ultimate .2% Yield Brinell strength Strength 4 Elongation Hardness (bsii fossi hE (3000 kg load) $4 32,000 27,200 35 105, 107 l Swom to and cubscribed MASSACHUSETTS MATERIALS RESEARCH. Inc. before me this................ clay I . of....................... 19.... I ..........g......gg............ j David Krashes ~ President . We 20lieve the above leSt to be reH&D 9 thO Correct ih4Ceur6CieS of eff0ft. If they oCCuf. Will be co in no event shall M assachusetts Matets Researctn. lac. De liable tot any spt lal, consequential or other pamages. -2..- u -.E--------A - s----.-- w-- ,.----e-m.,. ~--w , -,, + = "----y +

N 1 Massachusetts Mateials Rese0PCh, Inc. ) P.O. BCA 810

• 341 WELT SOYLSTON STRE ET
• WEST tonSTON. MA 01943
• TEL 90643b4382 1

? s Dew January 15, 1990 PO Nn 2 i Bosten Edison MMR Na J2912 ( Attention: f 3 Asport of tests i Raw, ele Identificationi Tiange i Element connesition (t) copper 87.22 Aluminum' 9.22 L i Iron 3.51 Manganese .02 Lead .01 1 Einc .02 e silicon <.01 ') Nickel <.01 i Sulfur .004 v E ? i l l-Swom to aM subserlds: MASSACHUSETTS MATERIALS RESEARCM,Inc. befot me this................ Osy Gf................... 19... A g.......................... Nota'y Pubbe Thomas Strenk s Chemist We believe the above 1981 to be reliable 466 correct thaccuracies or error 6 af they occur, will be correct 66 free of cht'G6 in no event Shell Masb4?hu$$tt6 Material 8 R4664'Ch. Inc, De 14 Die for thy spe:ial. C0t,$4Quentist or Other S&'naget.

,_._4 ,Au_ae-. 4** * - - - - Massachusetts Mate 4als Research, Inc. .A l P.0 MX tiO

• 241 WEST 90YLSTON 8TMEET
• WEST DOYL4 TON. MA 01683 I

Que January 15, 1990 { MM \\ Boston Edison-MMR No J2912 j t Attemert Report of tests i Emmelet Identification: Column (tube) t i Element Comnomitlen-ft) i 1: Copper 89.17 t Alupinum S.35 Iron 2.43 Manganese .02 74ad <.01 Zine .02 ' silicon <.01 Nickel <.01 sulfur .015 1 k k' Swon to and subsenbod 'MASSACHustTTS MATERIALS RESEAR0H. Inc, bel 0re me this.............. 04f Cf.......'.............. 19.... k " _ J ~g;ig,;/i>Mi" """ Thomas strenx chemist . W6 t$lseve the above 1981 10 lh MD $vt31 Shall M&SlkthW69tt$ Maltrat!t Retterth, thC. De liable IOP any 600 Ciel. ConttQ

Massachusetts Mateials Researth hx. 9 'g P.O 90X 810

• 341 WEST SORSTON STMEET
• WEST DOYLSTON, MA 01683
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Das January 18, 1990 Boston Edison Company Nuclear Operations pc Na 6edR Na - U2912 Attention Thomas Burns hapet of tests Material: Bronze Flange adjacent to fracture of column - Done on cross-sections at least 1/2" from inner column surface. Mardness BAAdinos Flees i Brinell s Rockwell R 7 85.5 77.0 8 89.0 76.5 9 85.5 10 77.0 85.5 79.0 Tennile Pronerties - Section A Ultimate Strength (psi) 78.000 .2% Yield Strength (psi) 36,900 % Elongation in 1" 23 ) S*0m to and subscnDed hiASSACH ET78 MATERIALS RESEAROM. inc. Oefort m0 this...,........... Cay

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'c MS Thomas W. Baxter Manager of Testing Services we bet. eve tne nove int to de rehabie one correct. Inneevracies or enors, it they oceve, witi be co in no e em st.an Museenuneus Materials menearen. Inc. be new for any spec:si, conseavential or other

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$5 w. p..:.:.::5.:. u,,.u..... o .w, R. Y. Fairbank Manager - Nuclear tagineering Department January 16, 1990 Seaton Edison Company 25 Braintree Mill Office Park traintree, MA 02164 J. 0. No. 1724 7. 21 to 3Lg 21 313 Dear Mr. Fairbanks la per your P.O. 01297 five tensile specimens were machit.44 and accordance with Alm 16. The 9 tested in specimens were taken from two pieces of as AgTM 3148 C93200 cast aluminus bronte tubematerial eupplied by Mr. T , 1990 and identified column. from a service water pump I by loston Edison from the middle of the 80 inch long co diamater of it inch and well thickness of 3/4 inch. It had outside h Materials Engineering Laboratory, four longitudinal strips of m At stone & Webster 90 degrees apart were removed 4 rom the tube in a band saw. Tensile specimens were ma,chtted per Figure 13 of ASTM 14 fo11cving dimenstenal requirements for specimen 1 in this Figure, were nominally 0.5 and 2 inch, respectively. gage width and length i.e. 1 Three of the four specimens were machined on the I.D a surface layer attacked by corrosion. . and 0.D. to remove had a Af ter sachining, these specimens rectangular cross section. The approx.. 1/16 inch deep penetration near the end of the sagefourth sp i I local was teeted for information only. length and Another piece provided for testing was a 120 degree segment long cylindrical section removed from the same of the 4 inch from the fracture in the flange area. cast column 2 inches away round specimen identified as 75 was machined per Figure 6 of AgTH 13 The tensile tests were performed at the stone 6 Webster Material on a 60.000 lb. sATEC tensile frame. e Laboratory following Tables The results are summarited in the ) m o

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Specification l Cr Yield strength j smacimen No. 9ees11e Streuth, rei 0,2% offesti rei Elenmatien. T. l Ar n 3148 65.000 (sin) 25,000 (ein) 20 (sin) T1 88.400 31.100 34 ) 72 70,000 29.000 16 73 84.700 31.100 33 T4 79.500 45.000 21 75 31.900 31.200 <1 $pecimens T1 through T4 rest the yield strength and ultimate tensile strength requirements. Three of the four specimens meet the elongstion requirement s. Specimen T4 has elongation noticeably lower than in specimens 71 and 73. This lower elongation in specimen 74 is attributed to the fracture path through a punch merk at the end of the sage tone. The test result for elongation in this specimen is still higher than the specified nintava and, per AgTH E8, this result is valid. Specimen 72 which contained a local penetration (Figure 1) at the end of the sage length failed at the penetration (Figure 2). The elongation at failure in this specimen was below the specified minimus. This result can be discarded since the specimen contained a sitm w snt flaw. Thus, the material of the piece removed from the middle of the column meets the specification requiresette for tensile prcperties based on results for specimens 71. 73 and T4. O fpecimen 75 failed stightly above the yield strength load at alongatten I of (1%. It met the yield strength requirement of AITH B146 but was well below its ultimate tensile strength and elongation requirements. The fracture surface in specimen 75 is orange red as opposed to the regular dull yellow color observed on tracture surfaces of specimens 71 through T4 An examination of the fracture surfaces in specimen 75 at low magnificattens indicate the presence of shrinkage porosity which could significantly affect the test results. Hardness morcemente using Rockwell, scale I were performed on specimens 71 and 7) asing k'ils on Rockwell Hardness Mater. All but two hardness measurement locations were en the grip section of the specimens. The instrument was calibrated prior to the hardness test using calibration blocks identified as 42.2

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The measured hardness of the blocks was 40.8 and 78.6 respectively. The results of the hardness test can be summarised as follows: soeeisen Rockwell, sesle i Hardnese T1 (middle of the column) 66 to 75 75 (near the flange) 41 to 52 ) S'd E 9E:JT 06, El id

Rardr.sse asesurements on the sage section of specimen 75 do not signs of strain hardening, . stow any .) i Fo hardness conversion tables for aluminus bronse are available. 3 rite 11 scale hardness can be estimated using conversion Table 4 (707 Howeve r. Cu 307. It) and Table 6 (Copper. Mos. 102 to 142 inclusive) free ASTM L specification 2140 as well steel and most non ferreve metals".as Wilson conversten chart No. 60 for "s l were as folleves The cor.verted 3rine11 hardness values beciren A W Table 4 Af *H Ta Y e 6 Vilson Chart Vitson Chart i 2.00 knf 500 kmt 500 +af 30D0 kaf 71 105 120 > 120 104 120 117 137 75 75 44 33 97 7$*83 The 3000-kgf values are available only for a limited range of hardness in the Wilson chart and net available in the ASTM 1140 tables. Note that the 3000 kgf scale generally gives higher hardness values compared to s the 500 kgf scale. i The results show a distitet difference between the hardness of the material in. the middle of the pump colun:n and hardness of the the material near the flange where the fracture occurred. Herdness of specimen 71 is close in ASTM 1148 for information only, while hardness of specim i f below the AgTM 3148 value. Therefore, in situ hardness measurements may be used for screening purposes in identifying the sones of low

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We apprettete this opportunity' to have served you and trust the above asets your requirements. Please contact us if you require any further assistante. Very truly yours. R. F.Cauthier Project Manager RF0/dm h. 'N yey r -e, ,.m.

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BOSTON EDISON COMPANY QUALITY CONTR01 INSPECTION REPOR1 No. IR3 # 96 0 0f._ Page / of A TYPE: ( ) INSTALLATION ( ) SURVEILLANCE (/)OTHER ~ BOSTON EDISON COMPANY DATE(s) PERFORMED: /- K-f o t PILGRIM NUCLEAR POWER STATION, UNIT #1 REFERENCE DOCUMENTS USED FOR INSPECTION PURPOSES: OCI 10.03 phpf 49er /.f3 f PDC # A'/4 DWG.# A/4-f' M.R.# MJf ##f PROC.# D.+'d OTHER: /. s'~. J. / u 4/. A 1. CONTACT: NAHE: A. V. FAffRAUN T TITLE: A/60 2.

SUBJECT:

(0# .? ? ) S' S' N' 0#"A# b Y I#E //LTARSM!/C EMM/A/47/0Af CF l 3.- DISCUSSION: I SfA //M/0 96 ?f-dCS* /(4EV. B) ai d i 1 pes r 4 R. ev. /) cod obswc schxrs se'enedaM / arc zw/nn,ed on P.208-A esrce tsuma n' A4l (DP). D E' /) M/M. WA// Atw/dhre FN/mi eskn/dA<d ws c .? 96"('%0. Aw a/Att -d kners ,4 vi,A m s r 2 1s ". N H. u/Aa. de'e-txrs Aw,d was o/so, 370", We area. m5esfed .gc.fMd oniArm ise// dehc.r s~/ nset .2 % m w o fo o e, 2Mi&d e.rbasAesVMmaed l a r seNat di +rt' sss!/e> < / / / / / j' / / / / // / / / / / / / / / .////// / / / / / / / / / / / v ion Manager /IR File Prepared by: Pilgrim Station - D.C.C. (original) Reviewed by: Date: J

v.-- - - ~ ' - ~ BolyHEDISONC0: g# tachasnt A3,1 ~ ' '" i . ~..j?C ULTRASONIC THICKNESS MEASUREMENT PROJE ~ ' g CoyeoNENT on sysitW #M 'PacCEowat (c'himAs 6t//-7'ep GC.CS0 YO 46. 90-)1 005 MR NLHEIR v. gatg INsf AWWIN T W & TE No 6M" 64 9 /-tr. 9 6 . eRECDstoN - *005j ' WCCMANIC AL saust W L TE No. CIP"CC7 \\ a' enttistoN <Y *0 0/" ~' PREFERENCE s&WPLEs= WECMANICAL WEAsVREWENTs!

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+7 ge: a . [ '} p, ri: a N U C'L'E A R H E T W.O R K -_The-following information or question was received via INPO's Nuclear Network computer system. Requests for. additional infor-e _mation, or respone,es-to questions should be directed to Sarah' y Slater,Jin the Systems Engineering Division (Ext. 8397, PNPS) Distributions j g 4 m OE 3709-I SLATER (BOST) 18 JAN 90 19:36 EST Subj ec t s' SALT SERVICE VATER PUMP COLUMN INCIDENT a COMPANY............... BOSTON EDISON CO. q UNIT.................. PILGRIM STATION NSSS/AE...............GE/BECHTEL RATING............... 670 MVE BVR EO EN /1 I ON 1/11/90, 'VHILE TRA!' SPORTING THE ' A' SALT SERVICE VATER (SSV) PUMP .i FROM THE ON-SITE. MACHINE SHOP BACK TO THE~SCREENHOUSE, THE PUMP VAS ' DROPPED FROM A HEIGHT OF.6 70'12 INCHES. THE DROP RESULTED IN A FULL b CIRCUMFERENTIAL FRACTURE'0F THE PUMP SHAFT CASING. INITIAL VISUAL EXAMINATION AND SUBSEQUENT-METALLURIGICAL. EXAMINATIONS CONCLUDED THE FRACTURE VAS BRITTLE IN NATURE. THIS VAS CIGNIFICANT SINCE THE MATERIAL BEHAVED IN AN UNEXPECTED AND UNANTICIPATED MANNER. .[ + i --EVENT DESCRIPTION -THE SSV SYSTEM AT. PILGRIM PROVIDES; FLUID FROM THE ULTIMATE HEAT SINK '(ATLANTIC:0CEAN) TO COOL PLANT SAFETY-RELATED COMPONENTS VIA HEAT .EXCHANGERS.- THE SYSTEM IS SAFETY-RELATED AND IS CONFIGURED VITH FIVE j . PUMPS. TWO PER SAFETY DIVISION AND ONE SVING PUMP THAT CAN.BE ALIGNED TO EITHER DIVISION SHOULD A PUMP BECOME INOPERABLE. THE VERTICAL PUMPS ARE FED BY 100 hp'M0 TORS AND ARE APPROXIMATELY 42 FEET IN ELEVATION. 'THE CASING OF THE PUMPS CONSISTS OF THE IMPELLER, A SHORT TRANSITION __ PIECE BETWEEN THE IMPELLER HOUSING AND THE VERTICAL PIPE CASING, THE VERTICAL PIPE' CASING (CONSISTS OF'FIVE 80 INCH COLUMNS VITH BOLTED FL ANGES )', AND-A TRANSITION /ELBOV SECTION APPROXIMATELY SIX FEET IN LENGTH. THE CASING.IS MADE OF ALUMINUM / BRONZE ALLOY (ASTM B148 ALLOY zk

C95200) 12 INCHES INNER DIAMETER. THE PUMP SHAFT,IS CONCENTRICALLY MOUNTED IN THE CASING AND IS STABILIZED BY SPIDER BEARINGS SECURED AT THE CASING FLANGE FITTINGS.

THE PUMPS ARE MANUFACTURED BY GOULDS PUMPS, VERTICAL PRODUCTS DIVISION AND ARE SECTIONAL - VIT 16 DHLC

1-STAGE' PUMPS.

)' PRIOR 70 1/11/90, THE ' A' SSV PUHP HAD BEEN PIMOVED FROM SERVICE FOR A MOTOR PROBLEM. WHILE THE MOTOR VAS BEING REPAIPID, THE PUMP VAS i t. A "r 3

i .>: 1 IREMOVEDFROMITSSCREENHOUSEHOUSINGANDTRANSPORTEDTO'THEMAINTEN- + -)ANCESHOPON.SITEFORMAINTENANCEANDINSPECTION. ON 1/11/90.-THE j -ASSEMBLED PUMP VITHOUT THE MOTOR VAS BEING TRANSPORTED BACK 70 THE . SCREENHOU SE. - TRANSPORT VAS BEING ACCOMPLISHED BY TWO FORKLIFTS WITH THE'42 FOOT PUMP SUSPENDED BORI20NTALLY FROM THE FORKS VITH SLINGS.- 4 DURING TRANSPORT. THE SLING HOLDING THE IMPELLER END OF THE PUFP i PULLED FREE DROPPING THE IMPELLER END OF THE ASSEMBLY 6 TO 12 INCHES 1 . 70 THE CONCRETE-FLOOR OF THE MAINTENANCE SHOP. FOLLOVING THE EVENT A '3600 CIRCUMFERENTIAL FRACTURE VAS OBSERVED IN THE PUMP CASING IN 'THE VICINITY OF A COLUMN FLANGE APPROXIMATELY 16 FEET FROM THE IMPELLER ' END.0F THE ASSEMBLY. VISUAL EXAMINATION INDICATED A BRITTLE FRACTURE OF THE CASING. THIS VAS: UNEXPECTED DUE TO THE DUCTILE NATURE OF' THE ALUMINUM / BRONZE ALLOY f FROM VHICH THE COLUMNS ARE CAST. DETAILED METALLURIGICAL TESTING AND ANALYSIS VAS PERFORMED AT THE LOCA-i. TION OF THE FRACTURE AND AT OTHER LOCATIONS ALONG THE COLUMN. ENG-L EERING STRESS ANALYSIS VAS ALS0' PERFORMED. THE FRACTURE IN THE VICINITY '0F.THE FLANGE-TO-BARREL LOCATION VAS DUE TO THE IMPACT LOAD OF THE L DROP..THE COLUMN FAILED IN A SUDDEN AND BRITTLE MANNER. FAILURE VAS l' THROUGH. A CRACK THAT INITIATED AT MULTIPLE SITES AND PROPAGATED ALONG $8%b A COPPER RICH, LOV STRENGTH NETWORK AT THE MATERIAL GRAIN BOUNDARIES. ')'THE'FRACTURESURFACEEXHIBITEDADISTINCTREDCOLORASOPPOSED70 L, THE CHARACTERISTIC YELLOW COLOR OF THE BASE METAL AVAY, FROM THE FRACTURE l LOCATION. A PRE-EXISTING CRACK VAS ALSO FOUND IN THE FRACTURE LOCA. TION THAT HAD BEEN PRESENT FOR AN EXTENDED PERIOD. THE CRACK EXHIBITED NO SIGNS '0F MIGRATION OR FATIGUE AND HAS BEEN ATTRIBUTED TO POOR VELDING. VELDING IN THIS LOCATION VAS A REPAIR VELD BUILDUP OF A MACHINED. SURFACE ON THE COLUMN INSIDE DIAMETER 70 REPAIR BEARING DAMAGE.- THE VELD BUILDUP VAS REMACHINED. THE FLANGE IS AN INTEGRAL PART OF THE COLUMN CASTING AND IS NOT VELDED TO THE COLUMN' BARREL. n MATERIAL TESTING-OF THE FRACTURE AREA METAL INDICATED REDUCED STRENGTH AND MATERIAL EMBRITTLEMENT. ULTIMATE TENSILE STRENGTH VAS 372 0F MINIMUM STANDARD, YIELD STRENGTH VAS 892 0F MINIMUM STANDARD, AND ELONGATION VAS VERY LOV. THE REDUCED STRINGTH/ EMBRITTLEMENT VAS BEEN ATTRIBUTED 70 A CASTING DEFECT (A-EUTECTOID CONDITION VAS FOUND INDI-CATING THE REQUIRED SINGLE PHASE OF THE MATERIAL VAS NOT ACHIEVED). IN ADDITION,1THE REPAIR VELD THAT LED TO THE PRE-EXISTING CRACK MAY -HAVE-AGCRAVATED~THE CONDITION. THE PUMP MANUFACTURER HAS INDICATED NO OTHER~ REPORTED FAILURES. TESTING IS CONTINUING VITH OTHER SSV SYSTEM COLUMNS. ANY UNEXPECTED RESULTS VILL BE REPORTED IN FUTURE NOTICES. ' UTILITIES VITH SIMILAR PUMPS OF SIMILAR MATERIALS SHOULD BE ALERT TO THIS CONDITION AND POTENTIALLY INCLUDE HETALLURIGICAL TESTING

)OR ANALYSIS IN FUTURE PUMP INSPECTIONS AND MAINTENANCE ACTIVITIES.

INFORMATION CONTACT: VILLIAM RIGGS 617-849-8860 OR TOM BURNS i at i

pr is w w..e ENENERING $UMCESl e essenswswa E utmau,adastasa#W887tt MH44tM 40th 000 4864 9Wil ff tR 9464004 January 19, 199g 7257-1 Mr. R. V. Fairbank Manager - Nuclear Engineering Department loston Edison Company 25 Braintree Hill office Park .Braintree, MA 02184 subteet: Operability Evaluation of 3 alt Water Lervice Pumps

Dear Nr. Fairbank:

Teledyne Engineering Services (TES) has reviewed the material property information and the draft reports for the subject evaluation, with particular consideration of the structural design criteria applied. TE5 concurs with the criteria used in the structural Based on this review,lly including the analysis methods used to determine evaluation,' specifica the applied stressest the use of the as-measured material properties; the factors app 1*.ed to the measured properties in order to determtne allowable stress values (use of a nominal f actor of safety of 10 on the ultimate a multiplying factor of 1.5 because the limiting stresses tensile strength,dipg, and the multiplying factors of 2.0 for OBE and 2.4 era primarily ben g for 55E); and, the conclusions with respe:t to structural integrity based on the above itsted items. We pa'rticularly went to comment en the procedure and factors used to --n determine the allowable stresses. The data indicate that the material properties adjacent to the flan d d d from expected values. Not .only are the yield and tensils'ge are egra ematerial, but th stren-icantly reduced. The degraded material approaches the characteristics of the cast irons considered in Part UCI of Section Vill of the A5HE Boiler and Pressura Vessel Code. Therefore, We consider it appro riata to use the factors on the material properties of the rules-of UCI the values of 10 ai,J 1.5) rather than the muca more liberal factors app 11 d by the Code to this material in the normal more ductile condition. Having made this correction, we consider it Class 3 factors for-correct to continue to apply the normal Section 111,(the values 2.0 and the Service Level C and Service Levei 0 conditions 2.4). Finally, we note that the icwest measured value of the tensile and that the strength has been used as the basis of these calculationsThis,plusthealleviatIngfac next lowest value is 205 higher. would be demenstrated in a more detailed analysis and the fact that the slight overstress condition exists in only one column, contribute to our opinion that reasonable assurance of structu,ral integrity has been y dem0nstrated. Very truly yours, (' TELE 0YNE ENGINEERING SERVICES hhyw ff(q V .A W..E. Cocper, PE / J. C. Tsacoyeanes Consulting Engineer Censulting Engineer enc.mu rw toto.:nnu uncists

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