ML19317G693

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Containment Structural Post-Tensioning Sys Surveillance Test Rept, Second Yr Rept
ML19317G693
Person / Time
Site: Rancho Seco
Issue date: 02/29/1976
From:
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
References
NUDOCS 8003260821
Download: ML19317G693 (62)
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Text

{{#Wiki_filter:___ RANCHO SECO 7-nuclear generating station UNIT ONE UNITED STATES NUCLEAR REGULATORY COMMISSION DOCKET NUMBER 50-317 OPERATING LICENSE DPR-54 e COrTalnmerv s ruc ura cos ensioning sys~em survei ance es reoor w FEBRUARY 1976 g! 8e 86 gM

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~ CONTAlleENT STRUCHRAL POST-TENSIONING SYSTEM SURVEILLNCE TEST REPORT (SECOND YEAR SURVEILLANCE) Rancho Seco Unit i Docket No. 50-312 Operating License DPR-54 SACRAMENTO MUNICIPAL UTILITY DISTRICT ~ MARCH, 1976 0

7. RANCHO SECO NUCLEAR GENERATING STATION UNIT.1 . CONTAINMENT STRUCTURAL POST-TENSIONING SYSTEM SURVElLLANCE TEST REPORT (SECOND YEAR SURVEILLANCE) r' DISTRIBUTION LIST COPIES Nuclear Regulatory Commission Director of Regulatory Operations (Washington) 40 Nuclear Regulatory Commission Regulatory Operations Office, Region V 2 W. C. Walbridge 1 J. J. Mattimoe 1 D. G. Raasch 5 R. J. Rodriguer 1 R. W. Colombo 4 R. P. Oubre' 2 J. V. McColligan 5 D. C. Browning 1 D. B. Cass 1 L L. G. Schweiger (QA Files) 1 J. Janis 1 i l L. R. Kellman 2 L Surveillance Procedures File (H. Heckert) 1 Document Control Center 1 Rancho Seco Library 1 SMUD Main Library, 6201 "S" Stree;, Sacramento 1 R. Berchin, Babcock & Wilcox Company, Lynchburg 1 J. Bayshore, Bechtel Company, Norwalk I VSL (c/o J.'Hiltz) 1 V. C. Lewis j i 1 j 1 i

s CONTAINMENT STRUCTURAL POST-TENSIONING SYSTEM SURVEILLANCE TEST REPORT (SECOND YEAR SURVEILLANCE) TABLE OF CONTENTS I-PART ^* y_- PAGE l l. INTRODUCTION 1.1 [~ ' 2.

SUMMARY

AND CONCLUSIONS 2.1 3 TEST PROCEDURE 3.0 4. TEST RESULTS 4.0 5. ANALYSIS OF TEST RESULTS 5.1 6. SURVEILLANCE PROBLEMS AND SOLUTIONS 6.1 Y 7. COMMENTS FOR FUTURE SURVEILLANCE 7.1 i-p- APPENDIX A - DOME TENDON D-28 CORROSION SURVEILLANCE STRAND REMOVAL 1 DOCUMENTATION i APPENDIX B - HORIZONTAL TENDON H-25 CORROSION SURVEILLANCE STRAND I REMOVAL DOCUMENTATION APPENDIX C - JACK CALIBRATION RECORDS 7 APPENDIX D -

SUMMARY

OF LOSSES FOR CALCULATED LIFT-OFF ,I %e+ [ -. e L L I Fl f4. + m@d---

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p. L I 1. INTRODUCTION e Ip The Rancho Seco Unit No. I containment reructure post-tensioning F system surveillance test-(second year) was successfully conducted as defined l. ~by the Technical = Specifications, Sections 4.4.2.1 through 4.4.2.5*. This report covers the results of the second tendon surveillance test which was p l conducted;in. November-and December. The second surveillance test was origi-p nally' scheduled for the first quarter of 1976, but was rescheduled to the last -quarter of 1975 while the plant was shut-down. The containment structure censists of a post-tensioned, reinforced ' concrete' cylinder and dome connected to and supported by a massive reinforced concrete foundation. _ The cylinder wall thickness-is increased at three equally { spaced locations to form vertical buttresses for prestressing hoop tendon end anchorages. Reinforced openings in the cylinder wall are provided for equip-g ment'and personnel access as well as for electrical and mechanical system penetrations. The entire interior surface of the structure is lined with a r 1 1/4-inch thick, seal welded, ASTM 285 steel-plate which serves as a leak tight L membrane. [ _ Principal dimensions of the containment are: inside Diameter 130 feet Inside Height (including dome) 185 feet Vertical Wall Thickness 3 feet, 9 inches Dome Thickness 3 feet, 6 inches Foundation Slab Thickness 8-feet w The post-tensioning system utilizes the VSL_55 strand system and is ~ composed of.126 vertical tendons, 117 hoop tendons, and 81 dome tendons. The configuration of the tendons in the dome is based on a'three-way system of three groups of. tendons oriented at 120_ degrees with respect to each other. The ver- - tical cylinder wall is 'provided with a ' system of vertical and horizontal (hoop) tendons. Hoop tendons'are'placed in a 240 degree system in.which 3 tendons form ~ two complete rings _using three' buttresses for anchoring the tendons. e. The primary purpose of the tendon survelliance program is to provide sufficient evidence to maintain confidence that the integrity of the reactor . build ing :If being ' preserved. The program consists of tendon, tendon anchorage .A and grease surveillance testing. In order to accomplish.the intended test purpose,_special Ilft-off ~ -Jacks were employedLand an~ agreement entered into with.a contractor specializing l inl post-tensioning work to provide technical expert!se, craf t labor, and access w platforms required 'to conduct the surveillance program. I

  • See.Part 6 ofithis report for discussion of nonconformances and dispositions.

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SUMMARY

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SUMMARY

AND CONCLUSIONS The post-tensioning system surveillance test program consists of the ~ following: 1. Lift-off measurement of tendon force on a total of 18 preselected tendons. 2. Stressing three selected horizontal tendons to 80% of the ultimate strength of the strand material (.8f's). 3. Detensioning the horizontal tendons stressed to.8f's and inspect-ing for damaged strands. 4. Removing one strand from a selected tendon in each of the hoops, vertical and dome groups and inspecting and testing it for signs of corrosion or other deleterious effects. ~ 5 Inspecting selected tendon end anchorages including end anchor hardware for indications of corrosion, abnormal material behavior, lack of grease coverage, or excessive stress. All test results were recorded in the field as the work progressed. F All Jacks and gauges used in the test were calibrated within one year of use. L The results of the second year tendon surveillance program verified that the post-tensioning system is functioning as intended and demonstrated that the integrity of the reactor building is being preserved. The following conclusions can be drawn from the results presented in Part 4 of this report: i 1. All tendon lift-off values fall within the acceptance band speci-fled in the test procedure. ~ 2. Tendons stressed to.8f's accepted the load without Indication of overstressing, broken strands or other signs of degradation of the integrity of the post-tensioning system. ~ 3. Surveillance of tendon anchorages, including tendon anchor head hardware, verified that all components have adequate grease coverage i and slow no sig ns of corrosion, excessive stress or deformation. 4. All corrosion surveillance strands removed are found to be free of corrosion. Tensten tests on representative portions of the corrosion surveillance strand samples confirmed that the ' strand has not exper-lenced degradation from corrosion or any other source. (See Part 6 l i - of this report for discussion of problems encountered during strand l removal). 5. Chemical tests made on grease samples taken from representative ten-dons confirmed'that the grease properities have not changed mater- ~ially. 2.1 an

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~.... - L r(O ouuo SACRAMENTO MUN3CIPAL UTILITY DISTRICT O 6201 S Street, Box 15830, Sacramento, Califomia 95813; (916) 452-3211 4 I I t RANCHO SECO NUCLEAR GENERATING STATION UNIT NO.1 PROCEDURE APPROVAL FORM Procedure Number SP 205.03 i Title TwqERVICE INSPECTION OF UNGROUTED TENDONS IN PRESTRESSED CONCRETE CONTAINMENT STRUCTURE Originator c.orne Drev g w Date 3/18/75 Approved bb Date,)-2)- 7J oroup su p Recommend Approval by Plant Review Committee: Yes [)() No [ ] w. Approved [ Date 3 ,2l-7 7 t ri.nt a.peness g-- J, 3 Recommend Revie(b) Management Safety Review Committae: Yes [ ] No Dd L ^ Approved n A4, x Date M C f f4 K v v s,rt s rint.ne.nt Fonserd to Mdnagement S ty Review Committee: Yes [ ] NoA] 1 Reviewed Date Monogament Safety Review Cornmittee i d -: 5 _;l*" ?.: }' ' ;rb]'. 5 '; 'j ; j)p ':y{'. ~ ~ ~ ,y,* '~ ~ '; 9l,. (y'bf [ * " * ' ( .t, - 9 ;.g + 7.., p -',' ~ ?; 3r ?. 'S f t *~ ' ?, ' ' u).

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s f', SMUD , SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street. Box 15830, Sacramento, Califomia 9!i413; (916) 452 3211 e RANCHO SECO NUCLEAR GENERATING STATION UNIT NO.1 PROCEDURE CHANGE APPROVAL FORM Procedure Number S P 2 Or. O v b1 Title /,,,,,,,; e, in.7,,, t, _ J L,,,yg,/ n,j,, _,,,, im 6%2aK O n. inator g _ y n p g,, m Date s,e,y,73-g e Appr [/g//f [,g.7,f Date '~ Oroub i rr ~ Recommend Approval by Plant eview Committee: Yes ()() No [ ] Requested Change 7Ae f,//m,,, A,f c A, m,_,. r, 4, ,,y d.* .i

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e-Anaa o of 1 h.ened e s~e na, _ n) Approved q 2 Date Q ~'l - 7 8 m, new commm Recommend Review by Management Safety Review Committes: Yes [ ] No [X) Approved J. A k Date A 9 ')B q g. w.m s o.n j i Fonnard to Menegement Safdy Review Committes: Yes [ ] Nok] s \\. Revened Date u.a n s. v noi commm L 'L. suuo4ses le/74 7 [$M.* xy 'y,..

r 'Tsuun SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street Box 15830, Sacramento, Califomia 95813; (916) 452-3211 RANCHO SECO NUCLEAR GENERATING STATION UNIT NO.1 PROCEDURE CHANGE APPROVAL FORM Procedure Number S p y ng, a y b2 y um ,,,,,,.m. /,,,. s..,, .t a. _ w w.a.,,,... Originator C F. D, ru 1-2 /- tr sp dJi /D Wod A M/ om F.-s-zc ~ ' ' Group Sup'ervpf f Recommend Approval by Plant Review Committee: Yes % .No [ ] Requested Change ne /, y, 4~,, s,,,,, g,,1 ' ' ;q,,,,j,,, z,. py. opp. Ls-<d J np L ae ap 6,,,- far,n. A'23 fa.,/ 7

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r s SP 205.03 . INSERVICE INSPECTION OF UNGROUTED c-TENDONS IN PRESTRESSED CONCRETE i CONTAINMENT STRUCTURE F m f 1.0 PURPOSE Verify the structural integrity of the Containment Structure Post Tensioning System. e

2.0 REFERENCES

r_ .1 A.E.C. Regulatory. Guide 1.35. ~ .2 Rancho Seco Unit 1 Technical Specifications, Section 4.4.2. .3 VSL, Drawings M8 File #6292-Cl2.05-35 & M9 File #6292-Cl2.05-36, E5.55 Detensioning Equipment. .4 Bechtel Drawings C-430,.C-432, C-447, C-470, and C-471. .5 Specification C12.05, Containment Structure Post-Tensioning System Surveillance. .6 Surveillance Standards AP 205.03. 3.0 LIMITS AND PRECAUTIONS .1 Timely performance of this procedure is necessary to assure compliance with Reference 2.2 above. .2 A maximum of one (1) tendon in each directional group may be detensioned at any one time. .3 Extreme care shall be exercised to protect exposed tendon material and anchorage from moisture and foreign materials. .4 Prior to operating jack, verify pulling head chucks are uniformly j seated by tapping chucks with wood block. .5 When lif t-off jack is pressurized, personnel shall be restricted from the back of the jack. Personnel shall keep hands and fingers ~ .away from tendon and ram while ram is pressurized, except as re-quired to install or remove shims. .6 ' Work within and in the area of the plant vent enclosure must be + coordinated with the Shif t Supervisor. = 1 SP 205.03-1 S i w, xa

r: 4 ~ 4.0L ~ SURVEILLANCE TEST PROCEDURE (Continued) D.'- -Bearing Plate and Trumpet - Visually = inspect bearing plate for cracking,1 excessive deformation and movement into the g.f-anchorage.. On those-tendons which are detensioned, inspect trumpet for grease coverage and physical appearance of grease. f Strand - Visually inspect exposed strands for broken wires, F J E. ' loose wedges and any indication of slippage into the anchor r - head. F. Bearing Plate'Hovement - The anchorages of Hoop Tendons 29, 53, and 112, Vertical Tendons 14, 60 and 100, and Dome Tendons 18, 74 and 30 shall be checked for movement of the bearing plates by measurement using the reference bars provided and dial depth gages. Resulting measurements shall be recorded. Sheets 2 and 4.of the surveillance log shall be filled in as-the tests are conducted. .4-

Corrosion Surveillance, Strand and Grease Test: At each surveillance, strands from three (3) tendons',

i.e., one in each of the three dir-ectional groups shall be removed for tension tests. The specific tendons. selected are to be those associated with the sequence number assigned the particular year of surveillance (See ".1" above~for sequence number and post-tensioning system log sheet 3 for correl-ation between tendon numbers and sequence). The horizontal selected l2 tendons must be detensioned in accordance with the procedure detailed on VSL Drawing' 8M. Detensioning and retensioning will require simul-taneous jacking at each end of the tendon. Once the tendons are de-tensioned, a single strand shall be removed. On vertical and dome 2 surveillance tendons only strands to he removed need be detensioned. The corrosion surveillance tendons were installed by first pulling in a 50-strand bundle and then installing and marking 5 surveillance. strands. The single ~ corrosion surveillance strands removed shall be one of'the marked strands. As.the strand is extracted the grease shall be wiped off and' any areas of corrosion cnf pitting noted on Log Sheet 5. Samples from both enda and the middle of each of the 3 corrosion surveillance' strands removed shall be tested to failure in tensior per ASTM 416. One' representative sample (1 quart minimum) of tendon filler material (grease) shall be removed-from each of the three modified corrosion surveillance tendons inspected and tested-forimelting, point per ASTM D127, chlorides per ASTM D512-62T, sul-fide per-AFTM D-1255, nitrates per ASTM D-992-52,'and water content per ASTM D-95-70. : Sheet ~3 of the surveillance log shall be filled 'in as the tests are completed. ~ A representative grease sample shall be obtained from one replace-ment grease barrel (if all barrels are from same lot no.) and tested to the above criteria prior to use. U SP 205.03-3 Rev. 2 j k 4.m M: W. ,lki s, a.. 2,. i:2, ?

4 5.0 ACCEPTANCE CRITERIA'( Continued) C. Shims - Inspection should reveal adequate grease j coverage and uncover no sign of excessive corro-j sion or loss of functional capability. D. Bearing Plate and Trumpet - Inspection should reveal adequate grease covera 8e and uncover no indication of excessive deformation or stress. No noticeable movement of the bearing plate into the anchorage shall have occurred. E.- Strand - Inspection should uncover no broken wires, indication of slippage, or excessive corrosion. F. Bearing Plate Movement - Movement between readings shall in no case exceed 50 mils. .4 Corrosion Surveillance: A. Sint;1e Strand Tension Tests - All single strand samples should fail above 41.3 kips (ultimate atrength). B. Strand Corrosion Inspection - Strand must show no ~' significant corrosion. Any area of significant or y questionable corrosion shall be tested in tension with acceptance per A above and the extent of corrosion defined. Any noticeable pitting should be measured and tested. Light oxidation as evidenced by a reddish brown color is acceptable. C. Grease Tests - All grease samples should meet the following limits: Melting Point greater than 110*F ~ Water soluble chlorides less than 10 ppm Water soluble nitrates less than 10 ppm Water soluble sulfides less than 10 ppm Water content-information only. P: If the samples tested fall outside the specified ILnits, further ' samples shall be taken and tested. l If the additional tests confirm the initial tests, j the grease shall be replaced. L1 t SP 205 5 4 l ~ = nn wn

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' EL 6'-11% -4.. -.* EL 5'-8 GROUND / / / / / / / / / / / EL = 0' EL.13'-8% ~- / / / /- / //// / 46'.E DEVELOPED ELEVATION I55 fbi 5'T5 NiZd i E. TEN 5 liSI5LY). ~ MODIFIED CORROSIONSURVEILLANCE TENDONS -se LIFT.0FF TENDONS - - - - - - * () NORMAL FIGURE 1 REACTOR BUILDING i SURVEILLANCE TENDON LAYOUT {lQQ e SACRAMENTO MUNICIPAL UTILITY DISTRICT SP 205.03-9 --hi-1 8J _ Pan a I-i r. m-b

i e POST-TENSIONING SYSTEM LOG SHEET 1B Tendon Group Tendon Lift-Off Tendon Stressed to Elongation to Seat and Number Force .8f's = 1817 Kips Retension SEQUENCE Loss I VERTICAL #64 (T) 3@ VERTICAL #15 b VERTICAL #61 k) VERTICAL #101 h h h 1@ DOME #27 t@ h h h 2h DOME #28 2e h h h 3h DOME #68 h h h 3h h DOME #19 h OME #29 h DOME #75 DATA BY: ~ DATE SP 205.03-11 %lW e t

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s. CORROSION SURVEII. LANCE u f' Tendon Group Sinale Strand Tension Test f's crease Tests and Number, Sequence End Middle End Melt Ft. CL S03 NO2 H O Content j-2 k.'. .g. HCOP 1114 1 5-l i. HOOP #25 2 ~ n s- . o vi HOOP #10 3 -o 3 5-y i. l l 9-p W VERTICAL f62 1-W VERTICAL f63 2 - W 1 l VERTICAL #64 3 l DONE #27 1 DONE #28 2 DONE f68 3 Replacement Crease 80 I. DATA BY n t 6 mM - I.- ,.:. ; J

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~ h@.>,/ ^ 2 / 1 y/ / 7 j ~ w. ) l M* - -. - ~. ~. - Tendon Number Tendon End COMMENTS: NOTE: 1. Contractor shall identify by color code on this sheet, the location of color coded surveillance strands for the corrosion surveillance tendons and mark the location of the single strand removed for corrosion inspection. 2. Any unusual condition noted during the surveillance program shall be recorded on this form with details DATA BY: provided to note the location and describe the features of the condition noted. DATE 3. Comments detailing the condition of the - strand removed for corrosion inspection and tensile testing shall be included on this form. \\ SF 205.03-15 .d A' /4 djd.$ '-.,Ys _h..d,

s. ENCLOSURE 6.4 RETENSTIONING CALCULATION Retensioning to be ' accomplished to elongation as required by shim stock + 1/4" (maximum load not to exceed.8f's). Final lift-off to be recorded. 3 7 i ~ h-r w SP 205.03-17 Rev. 3 s 6 I p'l;- t' *]_ M M_ %_, I - ~~r < .,j[ p_- % [ E t

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k r. ( 1 I RANCHO SECO NUCLEAR GENERATING STATION UNIT NO. I PO ST-TENSIO NING SYSTEM SURVEILL ANCE NO. 2 7 SURVEILLANCE REPORT i- ) J u km l LOS GATOS: February 1976 Prepared by: @d, G 'do Schwager / m s Reviewed by: , / cm ). Mwp-7 David T.)5wons6n ' e L -.

3.; '2.0 HOOP TENDONS e 2.1 Tendons Surveyed: [- Lift-off on tendons #26, #50, and #115. Corrosion surveillance on tendons #10, #25, and #114. b 2.2 Date Performed: November 17 thru December 12, 1975. [

2.3 Comments

No difficulties on lift-off tendons and corrosion surveillance tendon #10 and #114. Horizontal tendon #25 was identified as the horizontal surveillo.;:e tendon requiring stmnd removal during the second surveillance period. Upon removal of the grease cop and inspection of the anchomge it was realized that there were no color marks or other indication of the defensionable stronds. Without identification of individual stmnds at each end it was not possible to remove o single strand without a search. I The tendon was defensioned nearly totally and, assuming that the 5 remove-oble strands had been positioned at the top of the tendon, the uppermost _ strand was released imm the wedge at one end. The opposit< tendon end was then searched by pulling on the 9 uppermost strands. This search was un- ~ successful and subsequently, the remaining 8 uppermost stmnds on +he first end were released and pulled. Having tried 9 etmnds at each end, the tendon was totally relaxed and the wedges removed from all stmnds on one end (buttress 1), then a stmnd was removed imm buttress 2 and four other stmnds were moved slightly to identify each end. These ends were identi- ~ E fled Individually to insure easy removal on subsequent surveillances. The retensioning procedure followed the guidelines specified below: 1. Removed anchor heads from each end and shipped to VSL shop for honing of seating surface and replacement of wedges. 2. Endoed tendon to insure equal length of strand protrudes from each bearing plate. 3. Placed 4 shims under tendon anchoroge to end up with 7 shims and 3 shims under tendon anchomge to end up with 6 shims., a -. m.. m

h-2.0 ' HOOP TENDONS (Continued) r-4. Stressed tendon through anchomge to.3f's. l S. ' Sequentially inserted remaining 3 shims under each onchomge using normal retensioning procedure. e-I t 6. Once all shims were installed, stressed each end up to.75f's { through onchorage and seated normally. ~Made final lift-off. 7. 3.1 Tendons Surveyed: Lift-off on tendons #15, #61, and #101. r Corrosion surveillance on tendon #62, #63, and 64, i 3.2 Date Performed: December 2 thru December 9,1975.

3.3 Comments

No difficulties on lift-off tendons and or, corrosion surveillance tendons. ~ 4.0 GREASE SAA'.rLES AND CORROSION SURVEILLANCE STRANDS rW All the grease was clear. For results of laboratory tests, see Report No. 97532 or Log Sheet 3. The 3 removed strands for coirosion inspection exhibited no corrosion. The entire length of the stmnds was uniformly coated with grease. No unusual conditions were noted. For results of labomfory tests see Report No. 351 or Log ( Sheet 3. 5.0 ANCHORAGE SURVEILL/ NCE No unusual conditions were noted on anchor heads, anchor head wedges, shims .and bearing plates. All the parts were covered with grease and there was no indication of corrosion,' deformation o-loss of functional capability. Visual inspection of bearing plate Ind::.oted no relative movement with concrete. 1 = l ! ~ ,a+

( c2o ( !l g N n-w \\zd G 1'iP ~ \\ / h g2r 5 s s I 1 l 's 1 1 ~ ~ s $., \\ / s/ /* u l p ~ s i 1 ~,, ' - Y 1930 / \\ / ~ / c- 'N, P' ' [- n R~,

  • \\ '/

/ I 309 i [ q2s9 ~ D0ME (PL A N LS]lQW5. D.Of.ikfNDl!E}Q2dhfl@505YONM ~ BUTTRESS 3 BUTTRESS 2 DU1 TRESS 1 e-as@ - N 2GP 19P 2P ~ BOTTO?.! OF RING l GlHDER EL 123'-1% ~~ EL 121' 11 EL 120'-7.: 1 n a., y.r ,,:n; ; L--- EL 37'-11%

~~---- - - -

'---------------I

e. - - - - - -- - 5 EL 6* 11 %

EL S* 8 ^ ^ s GROUNO w j j j j j / / j j / t EL = O' EL - 13'-8% ~ / 4G'S DEVELOPEDELEVATION [5NOi5555Nikb0fN05NbONSONLYl. 110D1FTED CORROSIONSURVEILLANCE TENDONS se LIFT.OFF TENDONS - - - - - - * () NORMAL FIGURE 1 REACTOR DUILDING SURVEILLANCE TENbON LAYOUT ~ g z, bL SACRAf.1f.NIO fdVN!CIPAL UTILIIY D!OTRICT m ,.x? ' - ~ ~ ' .-..n f

L POST-TENSIONING SYSTEM LOG SilEET 1B Tendon Group Tendon Lift-Off Tendon Stressed to Elongation 'to Seat and 11oinlier Forec[t/NJ .8f's = IP,17 Kips Re tension SEQilENCE Loss [T) k h) 3@ VERTICAL #64 gro h) 1, VERTICAL #15 /Ito VERTICAL #61 p/gf (T) VERTICAL #101 /soo / ice 'N;~- 1h ~ DOME #27 KRo * - f// STRADES

n 1h

/Nao h /Irf h h 2h ' DOME #28 h 0 2@ /62o . h / iso h h. 3h DOME #68 ~ h /Coe h 3$ h /IBo DOME #19 h /C2o h /C/o ~ DOME #29 @_ m m h /soo DOME #75 /C2e DATA BY: L DATE /f - /f - 75 f \\E mm, i: =

f 'p., . mf._ -{=. _m... f_;., 7_... ! 1 "1 r - m ~ ;~ 7 7.,q

  • q:g;

-~~; ~..p' -,~,-} f;- s... ;,, .i....~...,... ....g a

4.. :

+ POST-TENSIONIUC SYSTEM, .= .s .. r.. LO3 SUEET 3 1, = 3 .~.... .~ :. l ' - l.- e.*. f '.'~' . ;. TEAK 07 TEST /274~' N7h,., L -l

  • ',.., ' '. ' '. 5,'. V.

{. '.,l *,Y :'. 1,: ' SEQUENCE 2 v - :y s. ~ CORROSION SURVEILLANCE ' - 1 .t Single Strand Ten 61on Test f's Creane Tests ?' Tendon Group' II0.jontent p,0g,,1 jog s M",['" l' elf,f t. ggC 2 and Ner.ber,, Sequence gjnj tJigdg. gnA7 f x g E00P fl0 1* e E00P 125 2 //2. 9fo

47. %

4/Jo o 978 * /H 4 <1 . 9a .or" .l . 9 - - t. o t., HOO? f114 3 p .o l .J ) g. VERTICAL #62 .1. - ~

42. Boo
  1. Lh7s 1/2ob6

> 200 /Vo / </ I. o 01~ VERTICAL C63

  • 2 l

i VERTICAL 164 - .3 )

    • DOME f 27 1

o 2 H2.o.h ' 4.9. Jo*o

  1. 2. % o 462 fff

</ </ .RC .of . DCMS i28 s 3 ..,DCY.Z f68 4 ~ Repl.acen&nt Crease </ .So . o d~ 36 2 /sg 2 t. E DATA BY: ; t. - j yg-l g _ g g _ 7g. ..., ; ~, ~

HALES T ES"ING A303ATOIIS TESTING B INSPECTION SERVICES r-agpry To 1A3CRATORIE5 964-69CO AREA CODE 406 OAKLAND IISS NORMAN AVENUE SAN JOSE r MTERU-SAUNAS SANTA CLARA,CAUFoRNIA 95050 MN f RANLIVo February 12,1976 HTL.NO.SD-859-2 LAB NO: 351 PROJECT: RANCHO SECO JOB

SUBJECT:

Tension Tests on Seven-Wire Stressing Strands PM Nine (9) 1/2"# Seven Wire Strands MATERIAL: DATE RECEIVED: January 27,1976 REPORT TO: VSL Corporation P. O. Box 459 Los Gatos, California 95030 REPORT Gage Length Section Area Yield Strength Breaking % Elongatio2 Mark (Sa.In.) at 1% Extension Strength in 24 Inche ~ Horizontal 25-M 0.1558 38,190 42,850 5.7 _ Horizontal 25-M 0.1543 39,170 42,900 5.7 H rizontal 25-M 0.1535 38,630 41,900 5.7 Vartical 63-M 0.1534 38,650 42,800 6.0 Vertical 63-M 0.1532 38,810 41,950 4.7 V rtical 63-M 0.1546 38,120 43,000 5.7 Dome 28-4 0.1531 38,790 42,050 4.7 i Doma 28-4 0.1558 39,330 43,100 5.7 Dom 3 28-4 0.1546 38,730 42,700 5.7 ~ M20ts ASTM A416-64. Respectfully submitted, HALES TESTING LABORATORIES By/b'?Mcl$.x c / ?Y MSivil/ss ~ 3 cc VSL Corporation '[ b M e [ J

r 'Q POST-Tl2!3]O!UNC SYSTE!! LOG SilEET 4 Year of Test /S 7f r I t [ TEliDON !!O. REFERENCE ' EAR 11EASURE14El!TS l-LE F.T_. 1111)D.L.E ' RT N P INIT. SURV. DIFF. INIT. SURV. DIFF. Il!IT SURV. DIFF i i -l lloop #29 t ~ ;2 5..~.'

57.:.-

Hoop #53 ...,t..o n,.t.:. .g,...=,~. .:: g;_.__ - ~* lloop #112 { I i l Vertical #14 I f Vertical #60 Vertical #100 i i ? i Dome #18 l .I -l I Dome #74 I. Dome #30 l .l el i, 1 Data By: .e .0,17/7 04 /06 f4667 4A Date /2 ;- /C - 75 ' /*,, rec /p To /8A e 6 g .,) s.j. l s%n. 2,. e

h-E[.!UM SACRAMENT 3 MUNICIPAL UTIL11Y DISTZlCT-gg fyg7-fj j p, f y,, jg sueJacT CATE STRUCTURAL INTECRITY TEST End Anchor Surveillance oser. Generation Engineerir.: p,e h Y j. % .}; 6- $b STP 006 Horizontal TENDON TYPE Vertical Teridon No. /4/ hM Dome \\ 1. Baseline inspection Dats O$ SERVED CRACKS 2. Peak pressure inspection Date 3. One to three days after stru-cture test Date 4. Surveillance Date /2 - / - 7f 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp 3 Time Exterior Concrete Temp Interior Temp 4 Time / 8.

  • Exterior Concrete Temp S/* Interior Temp 83*

w, All Reference Bar Measurements Taken According to Sketch REFERENCE BAR MEASURDIENTS ~ Left Middle Right 1 Base Line 2 Peak Pressure 3 1 to 3 days after S.T. 4 Surveillance 9.422 /. # 2 8 P. 7// Crack Sketch r. .r. r r p, g k* O [ t I$ 'suuore.ts sna 2C r L * "t - A, A.l_ h. t3 WJ b.

L fi) JUD ' ~ SACRAMENTO MUNICIPAL ' UTILITY DISTRICT ggg gg7 gj ,, gg i, /g SUSJECT oATE ~ STRUCTURAL INTEGRITY TEST End Anchor Surveillance o set. Generation Engineeri.: g.,' /f4 STP 006 4.u Horizontal TENDON TYPE Vertical Tendon No. /8 ffop/-# Dome 1. Baseline inspection Data. O$ SERVED CRACKS 2. Peak pressure inspection Date 3. One to three days after stru-cture test Date 4. Surveillance Date

  1. - /( - /f h 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior' Concrete Temp Interior Temp 1

3 Time Exterior Concrete Temp Interior Temp 4 Time /f Exterior Concrete Temp.[5

  • Interior Temp All Reference Bar Measurements Taken According to Sketch REFERENCE BAR MEASURDIENTS Left Middle Right 1 Base Line 2 Peak Pressure 3 1 to 3 days after S.T.

4 Surveillance ..frv /o W . f/o [ Crack Sketch 4 q:- . e c r= 1 Ato O/.//>cf /4/ C#d M R It 'suuo er'ts sna 2C .s..a w w : x

E ' SACRAMENT 3 MUNICIPAL UTILITY DIST2tCT Ag fpg g/- // g reos [ # o' /8 P' oATE STRUCTURAL INTECRITY TEST End Anchor Surveillance oErr. ~ Ceneration Engineeri.: A REFERENCE CY e w (cy J_uo g /[l STP 006 \\ Horizontal ~ TENDON T1??. Vertical Tendon No. /S da/W-/~#/ Dome-1. Baseline inspection Data. O$ SERVED CRACKS 2. Peak pressure inspection Date 3. One to three days after stru-cture test Date 4. Surveillance Date /f- // - /[ 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp ~ 3 Time Exterior Concrete Temp Interior Temp 1 4 Time .f ** Exterior Concrete Temp f#* Interior Temp 8f* We All Reference Bar Measurements Taken According to Sketch REFERENCE BAR MEASUREMENTS 9 Left Middle Right ~ 1 Base Line 2 Peak Pressure 3 1 to 3 days after.S.T. h 4 Surveillance /. 4'J2 /: 6/2 A 4o8 Crack Sk tch l p _;q e e e V AAo f/f/7// CE#Cfd sy-q. py b i-w i . g p suuoerts sna 2C =-_; : :.-.._:_.- .. =..,

,,,,,,m,

  • h$.b 0

SACRAMENTO CUNICIPAL UTILITY DISTRICT fog [gy-- // j e, g g /g b SUSJECT DATE STRUCTURAL INTECRITY TEST End Anchor Surveillance oErr. Generation Engineeri.: N h s,),. ).Mu h //// STP 006 f REFERENCE CY F Horizontal TENDON TYPE Vertical Tendon No. fo oprw Dome 1. Baseline inspection Data O$ SERVED CRACKS 2. Peak pressure inspection Date l 3. One to three days after stru-cture test Date 4. Surveillance Date /f 7f b 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp ~ 3 Time Exterior Concrete Temp Interior Temp 4 Time f #* Exterior Concrete Temp /d9 Interior Temp 88* i.. All Reference Bar Measurements Taken According to Sketch REFERENCE BAR MEASUREMENTS I left Middle Right 1 Base Line 2 Peak Pressure 3 1 to 3 days after S.T. L-4 Surveillance /, /82 AM2 //3/ l Crack Sketch ] L A/o C#as f w c b sc d. 7 r= /2 3-77 h i r. L it 4L. u ~ suuoPr.is sn2 2C

hi ) SACRAMENTO MUNICIPAL UTILITY DISTRICT gg /p y j- //g Page /g g of /[ SUSJEc7 CATE STRUCTURAL INTEGRITY TEST End Anchor Survcillance o m rT. Generation Engineeri.: uY, flb STP 006 g Horizontal TENDON TYPE Vertical Tendon No. SJ Opra 8a/r r i Dome i 1. Baseline inspection Data. O$ SERVED CRACKS 2. Peak pressure inspection Date 3. One to three days after stru-cture test Date 4. Surveillance Date /E - N - 7d' 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp 3 Time Exterior Concrete Temp Interior Temp 4 Time // f* Exterior Concrete Temp.I'4/

  • Interior Temp 8f*

I L m All Reference Bar Measurements Taken According to Sketch REFERENCE BAR MEASUREMENTS l Left Middle Right 1 Base Line 2 Peak Pressure 3 1 to 3 days after S.T. 4 Surveillance / 688 /.d[2 / 27Z Crack Sketch ~ i m" //fd/P/'d MG NTi /AJ ML /DC j j$WL /plMcrNo 0F Ec-fr/"'I ~ a /Wff / Sob". derf /Jer Rf/dhW~ Wf/4*NT 4//rw (ONCXG7f. g. os aww ct.wrt n _L ~ ~ ~ suuore1s ans 2C o.

.j y w v.qg gp . M taaf t SACRAMENTJ MUNICIPAL UTILITY DIST.' JCT gg fpg7. g,p ,,,, jy j,, pp I SUSJECT oATE I, STRUCTURAL INTEGRITY TEST End Anchor Surveillance o Eer. ~ Generation Engineeri.: CY REFERENCE c-- v I ~ Horizontal TENDON TYPE Vertical Tendon No. g~e, Top Dome 1. Baseline inspection Data O$ SERVED CRACKS 2. Peak pressure inspec:: ion Date 3. One to three days after stru-cture test Date 4. Surve.111ance Date /2 - / - 7f b 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp " ~ 3 Time Exterior Concrete Terzp Interior Temp 4 Time /U Exterior Concrete Temp M* Interior Temp _ 9f* F L All Reference Bar Measurements Taken According to Sketch REFERENCE BAR MEASbREMENTS teft Middle Right 1 Base Line 2 Peak Pressure 7 3 1 to 3 days after S.T. 4 Surveillance

f. 4SZ

/. 2.1/ /.39/ I Crack Sketch h /)d f/f/8/.f [fl?$ c e lg= 3 C l i. i h c 3 suuo re.is sn2 2C 1 1

h b.M.M SACRAMENTO CUNICIPAL UTILITY DISTRICT g fpggg pg ,, yg., /g F' sussect oATE {, STRUCTURAL INTEGRITY TEST End Anchor Surveillance oser. f-Ceneration Engineeri.: i sY x,,/u pfL STP 006 c t, Horizontal TENDON TYPE Vertical Tendon No. /9 4//-f7- _ Dome 1. Baseline inspection Data O$ SERVED CRACKS 2. Peak pressure inspection Date 3. One to three days after stru-cture test Date 4. Surveillance Date

  1. -25-7C d 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp 3 Time Exterior Concrete Temp Interior Temp 4 - Time IU Exterior Concrete Temp (f
  • Interior tem}.,
  1. fe #

L; All Reference Bar Measurements Taken According to Sketch REFERENCE BAR MEASUREMENTS g Left Middle Right 1 1 Base Line 2 Peak Pressure 3 1 to 3 days after S.T. ~ 4 Surveillance /. o f. /.72 f .SS( l Crack Sketch u. QQ [$/A)$$ lll = S-i- 7 1.* i, 'oneuo er.is sna L 2C

h* } {&} ~ ~ SACRAMENTO MUNICIPAL UTILITY DIST.~.lCT gj, /g gg fp g 7-fj j p, SUSJECT CATE ~ STRUCTURAL INTEGRITY TEST End Anchor Surveillance oi T. [ Ceneration Engineerir.7 LY REFERENCE STP 006 r-i Horizontal TENDON TYPE Vertical Tendon No._ /oo Z ryp// _ Dome 1. Laseline inspection Data. 0$ SERVED CRACKS 2. Peak pressure inspection Date 3. One to three days after stru-cture test Date 4. Surveillance Date /7 </- r b 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp 3 Time Exterior Concrete Temp Interior Temp I' 4 Time f "- Exterior Concrete Temp ff* Interior Temp 8f* e. All Reference Bar Heasurements Taken According to Sketch L r [, REFERENCE BAR MEASUREMENTS teft Middle Right 1 Base Line 2 Peak Pressure I 3 1 to 3 days after S.T. L-4 Surveillance A#6 /,J /8 /. J76' d [ Crack Sketch L. f 1 a a l lli= 3 4/o CHADGG ? CS,/Cfd t L 11 F. L snau o re is s/72 2C LS.<

%G N._

=-

~ SACRAMENTO MUNICIPAL UTILITY DIST.itCT g fp g 7-gj p ffj o // SUSJOT CATE STRUCTURAL INTEGRITY TEST End Anchor Surveilbnce oser. ~ Generation Engineerint h v'h ,,, gg pf4 STP 006 v ~ 1 Horizontal TENDON TYPE Vertical Tendon No. '/2 [oprg ##/7"~ ~ ~ Dome 1. Baseline inspection Dats 0$ SERVED CRACKS 2. Peak pressurc inspection Date 3. One to three days after stru-cture test Date )._ 4. Surveillance Date /2 -/- F 1 Time Exterior Concrete Temp Interior Temp 2 Time Exterior Concrete Temp Interior Temp

  • ~

3 Time Exterior Concrete Temp Interior Temp 4 Time // h Exterior Concrete Temp ff' ' Interior Temp /f* All Reference Bar Measurements Taken According to Sketch REFERENCE BAR NEASUREMENTS left Middle Right J 1 Base Line 2 Peak Pressure j I 3 1 to 3 days after S.T. 4 Surveillance / I.fJ /.2 f/' h Crack Sketch i g&h[h(f W Hes1wffs'rart Nrmkr n;, h h(Ef / V/E#ff,47. Ao felde M d lC= 3 i-N0' W N </7~ W/Yo Coc(fc=re c n ~ 'au uo're.ss s m 2C a-m _ ~

o v. .l. h0ST -TI.IISIO' ll:C SYSTE!! 1.0:: S!!EET 5 YE/dl 0F TEST /f7( SEQUENCC 2 vi u we.s a.c i J t. a _....,..q.. ;._.. g. = _ _. _. _

  • s s

!!l

  • e l

h ~,{, g ,\\ y .Pemoea sr.fa n e A w vc l \\g3.:-== *:-~4 Y /Je, / '\\ @gp(Wn)y.@.: 'i'~Q. N r 5 f-w~. e?A Kba @v.g - -..4,& S 'i M YC @$55;Q6 @. Mn L .' ' 4 $o %q g y &; g g @.... . g} . -.. -u . 'S(<@p; p@y ,) ..> s ' @Q u' ~ :.,1. % ~ ),,. i ^ }.,/ '~ l t l .V ~ T / .J.....---. /. . I. m [ l b I ...p.. v. .w foN# Tendon Nut 6er /-97-/ Tendon End COWLENTS: jjo m utu.st MDAh-Not .De re~ r r ADPm/an fuh&kt ADtf SD427J' JRPO N2VP Afff&c~E >en. NOTE:. 1. Contractor chcIl identify by color code on this sheet, the location of color coded surveillance strands for the corrosion surveillance ~ ~ tendons and mark the location of the single strand removed for i f corrosion inspection. 2. Any unusun1' condition noted during the nurveillence program shall f he recorde' on thin forn teith details provided to note the location nnd DATA BY: ~ dercribe the features of the condition s noted. pg,rE p- - 7( 4 Commentn detaillun the condition of the 3. strand removed for corrosion incpection .and'Lennile testing shall be included on thin" fo na.

a. a _

. _ _ _..i

i l'OST..TI:llSIO !II:G SYST1:M LOG SIia:r 5 Yl:/iR OF TCST /S 7( 4 SEnUDICn 2 g v3L we.w.c f., s N I l g l: .}f' g- ). frN"J,Pexores r-es ~ V ~ g^ l r.9.-...%4 e d'os*f0fbD ft/Prf &.4 D r d' Ch)(.@MDS42@p@in\\. w.o w.. (.) eng .6HSX'5GU%R@ g q- ._.y,_. g(h h, p).g,;g g g . ; 3, _._. . 6,3)h'; 5 . ',.) 8 . T I.h)6 . 1) I-u ) $ y@, **)/ 3 y= =..: c \\q ' /' 6 s l T. r l ~ m. [ [- 1 L z+- Tendon Nut:ber p - M-.S .Fous Tendon End COMMD;TS: sjo murust_ con _p/* E >>r Llore /- ('of Po fA?n lt/PrthO.zApr/~ frPAMM b W oPer/P' bp rs-D ~' NOTE: 1. Contractor chall identify by color code on' thic sheet, the location ~ of color coded surveillance strand: for the corrosion surveillance v tendons and narh the lo ation of the single strand removed for ) corrosion inspection. ~~ 2. Any untu:ual condition noted during the nurveillance program chall be recordc'd on this form udth details DATA BY: provided to note the location nnd describe the features of the coadition _.m . notcd. pg.g.E f-f7-Y 3. Commentn detailing the condition of the strand removed for corronion innpection i and tensile testing shall he included on thin fona. b. m

E L. :.., i l'OST--TI:(!SIO::II:C SYSTE!! Lot; S!!i:ET 5 YlMll 0F TEST /J7t~ l 1 SE0 tint!CE P w,. s.,c., > ,3 J ........ _.....,,.;..y j g. .j. - \\ I I f,. .B ,I e I I c ..h - ..... d p. i f. t l [@'gS*"-%' ce@@hb

u. > w..

@pp...- g W 4bae@ws# .6tM9@DM'N6@. .. y.- <, mg#0 0 Mqa@#65 ;gg.3 99.._ .,), _. _.. 3 .. f. .w '. W@@p!a @@I ' h@@/ M u@ 2c ~ s / .[ l l ~ l ~,- 1 ,..p. a. Tendon Muchdr 4-68-J~ (EOYM) Tendon End COWIENTS: Do zujytyA1 c'02]D !-l01)f /Jo7/./] mM1 Asis.% 9w-5/A W K NRAA>A f' E)PfoPM1P M 44 N't.B ~ h.m NOTE: 1. Contractor chall identify by color code on this sheet, the location of color coded surveillance strands for the corrosion surveillance tendenti and narl-the location of the single strand removed for corrosion inspection. 2. Any unusual condition noted during. the surveillance program shall W-he recorded on this form with details DATA BY: provided to note the location and - describe the features of the condition n oted.- DATE @ M-7S L _ 3. Comments detailing the condition of the strand removed for corrosion innpection and tensile testinn.shall.be included on this form n.

i F G suun SACRAMENTO MUNICIPAL UTILITY DISTRICT C 1708 59th Street, Box 15830, Sacramento, California 95813;(916)452 3211 I e i The Acceptance Criteria for Test Procedure SP-205 03, " Inservice p {; inspection of Ungrouted Tendons in Prestressed Concrete Containment Structure" has been reviend by me. I find all the data within the Acceptance Criteria as stated in Se.ction 5 1, 5.2, 5 3, 5.4, and 5.5 of the Test Procedure. YD / t-Val Lebis Senior Civil Engineer Yatch /C. /976, Date tg

s N

n; ) k I L Ah' ELECTRIC S Y S T E f' - SERVING MORE.THAN 600,000 IN THE HEART OF cal'FORN4A rc,-- w-- _- - -, - n

i I' b t n 5 ANALYSIS OF TEST RESULT 3 [1 h c. A T 4 + -.k s .M' a w.. W l f.- L_. 5.0 /

y L W 5 ANALYSIS OF TEST RESULTS The tendon lif t-off tests verified that tendon force has relaxed as the. original design. assumptions would Indicate. This result confirms that the original design assumptions are accurate. In calculating anticipated lift-off loads, only reductions due to relaxation' and previous stand removals were considered. It can be assumed for all practical purposes, the only factor materially effecting tendon force af ter the first surveillance is prestressing steel relaxation. This is true because essentially all stressing sequence, concrete creep and concrete shrinkage losses have already taken place by the time of subsequent surveillances. A table f' listing the calculated lif t-off forces and calculated losses is included in Appendix E of this report. The acceptance band for individual lif t-offs allows a minimum force cf 5% below the calculated value and a maximum of.75f's. The minimum figure allowed for measurement inaccu racles. The maximum figure is the maximum stress level desirable at the tendon anchorage. The list on the following page tabulates the calculated lift-off load, specifies the acceptance band, lists the actual lift-off force and shows as a percentage the di fference between the calculated lif t-off and the actus1 lif t-off. L Assuming a maximum 40 year relaxation loss of 4% and that approximately 2.6% of this has taken place by the time of the second survelliance, the 40 year tendon force level can be estimated to be equal to the second year surveillance ~ force less 1.4%. This would indicate that the anticipated force level in all tendons af ter A0 years of service will be above the design minimum of 1363 kips average tandon force. An analysis of the reference bar measurements for the west end of horizontal tendon No. 29 (Log Sheet 4A, pg. 5A of 18), Indicates a difference in dial depth gage readings (from first survelliance), in excess of 50 mils for the left and right reference bars. After close vi'sual inspection of the j bearing plate, it was ' concluded that the lef t and right reference bars have been deflected towards the bearing plate rather than the bearing plate having moved outwards from the structure. The fact that the middle reference bar measurement has remained rather constant would offer further evidence that there has been no significant' movement of the bearing plate. l '1 - 5.1 v m} l * -w Y

6. SURVEILLANCE PROBLEMS AND SOLUTIONS m om A. / ~ L: N I L '6.0 f ~. 4

s.. ' r. 6. SURVEILLANCE PROBLEMS AND SOLUTIONS Two!relatively minor problems were encountered by the contractor performing' the tendon surveillance work. The following section describes the problems encountered and discusses the solutions. LI. ' DOME TENDON D-28 CORP.0510N SURVEILLANCE STRAND REMOVAL e . In attempting. to renove the surveillance-strand f rom Dome Tendon #28, it was found that the paint markings, on the strands prepared for removal, were no longer visible. Because of this, it was necessary to release one strand from the top of end 4 and attempt to locate the other end ~ by. pulling on the uppermost strands with a monostrand ram to.7f's. At this force, the wedges will not unseat if the 3 strand is loaded at othat end. Twenty-five strands ~ were tried without finding the unloaded strand. The re-leased strand at.end 4 was then stressed cack to its original' elongation and anchored. A second strand was then released at end 4 and a similar search for this strand at end 3 was successful. Nonconforming Report No'. S-451, ' included in Appendix A, documents this strand identification a problem. i w ? u-f 6.1 u \\ =1

=. v F j 7. COMMENTS FOR FUTURE SURVEl .4C ES he b D N 7.0 5 L.

r 7. COMMENTS FOR FUTURE SURVEILLANCES r In future surveillances consideration must _be given to the following factors to ensure accurate evaluation of the test results: 1. The anticipated lif t-off force should be calculated by m p deducting the relaxation losses anticipated since the L last surveillance from the lif t-off force recorded at the last surveillance.' g 2. The minimum acceptable lift-off should be the greater of -5% of the calculated or the minimum design value of 1363 kips. r -- 3. The acceptance band for corrosion surveillance tendons from.which. strands were removed for testing must be adjusted to. reflect the decrease in tendon force re-su l t ing f rom the st rand renoval. 4. Grease drained from vertical survelliance tendons should ~ be recovered and retur ned to the tendon upon completion ~ of the test. 5. Fill out Log Sheet 5 for (Se vertioal and horizontal tendons which have strands removed for corrosion sur-veillance. 6 h P d 6 s 7.I .s g. 'p-, -g_

p: e r l-i ? ( b APPENDlXES MP w 9 J 7. a ~ w to P

9, - le APPEND 1XES Append ix A DOME TENDON D-28 CORROSION SURVEILLANCE STRAND REMOVAL DOCUMENTATION NCR No. S-451 on inability to locate and remove corrosion surveillance strand from dome tendon D-28-3 end following detensioning color marked strand at D-28-4 end. B HORIZONTAL TENDON H-25 CORROSION SURVEILLANCE STRAND REMOVAL DOCU-MENTAT10N NCR No. 5-455-1 on inability to locate and remove-a corrosion-surveillance strand from horizontal tendon H-25. C JACK 'CAllBRATION RECORDS March 13, 1975 calibration of both Jacks. May 6, 1975 recalibration of Jack C409872. D

SUMMARY

OF LOSSES FOR CALCULATED LIFT-OFF %s = k p h L2_ 4 =+ I ' " r

F i h APPENDIX A s DOME TENDON 0-28 CORROSION SURVElLLANCE STRAND REMOVAL DOCUMENTATION P h M l 6 1 ~ ^ M N N

[- RANCHO SECO j Oua ty Clan I NONCONFOHMING REPORT CO. S431 ! YSTEM Eggt_tgnsioning jygdqge) S PREPARE *J CY V. Levin l f._ EQUIPMENT 1.0 NO. LOCATION p,nchn g,,pn DATE 12-5-7's EQUIPMENT NAME, East-tennioning Syst,em PURCHASE ORDER NO. Ref. Dwg. C-131 nr.o.a m, gg ( {,,ne.c h il DESCRIPTION OF NONCONFORMANCE Unable to locato and remove 3 strand at dome tendon #2-28-3 following detensioning orange marked strand from #2-28-4 end. r-l 4 IIA DESIGN REVIEW AND 10CFR Section 50.59 review required. , M '.'N Ic Cd i.A lJ - l M 5' Val Lewis 4 12-10-75 SMn a t ure' > Date DISPOSITION (Orck $ne) ill ACCEPT REJECT REPAIR REWORK REPLACE IV DISPOSITION INSTRUCTIONS AND TECHNICAL JUSTIFICATION (1) From #2-28-4, detension blue marked strand. (2) From #2-28-3, tension individual strands (0.7f's max.) starting at the top of the tendon and working in a logical sequence to unseat the appropriate wedge and remove the strand. In this manner only the wedges on the detensioned strand ~ will unseat. (3) Retension orange strand #28-4 to approx. original wedge position on strand. Do not exceed 0.8f's. M = ,2lnl7s- "".21M~,,"2' r~ '~c " - a , g ,,, e,,,,,,e, COGNIZ AN FE NGIN E E R / Odf7E V ENGINEERING REVIEW BOARD (required on sti neceptfrepair dispositt ns) 0** b h 'J D DATE P 5U Pt.Hl N T LN DEW D ATY. ~ -hW /2//6//f CODE INSPECT O R DATE (if reguired) hfAN AGER GENER ATION ENGINEERING 'OATE ~ VI REPAIR / REWORK / REPLACE COMPLETE and ACCEPTABLE COOL INSPECTOR O ATE (ef ernurred) INSPECTOR / ENGINEER DATE VIA RETEST COMPLETE and ACCEPTABLE TEST RESULTS APPRoVEo BY DATE Vil CAUSE CORRECTIVE ACTION ~ (1) Strands on #2-28-3 end not properly N/A - Construction deficiency.o Color Coded. g -fo M WR+ %/, r 41/- 'Yihr O Maneser Generation Engineerint t f OlelEngineer il) h . OlSTR19UTION Plant Superintendent _ _ (J) ShtUD QAD (I/ Orig.)

7 5 r i ? a r* M APPENDIX B HORIZONTAL TENDON H-25 CORROSl0N SURVEILLANCE STRAND REMOVAL DOCUMENTATION [ n-g_ + = {r I., L [. !.u m, L.

i ~ RANCHO SECO Crigirl o.eilt, ci,,, I NONCONFORMING REPORT Los t U _S.-455 RI._ I SYSTEM Post _ Tensioning _ System PEEPAIED C1 John Hf itz EQUIPMENT f.D NO. LOCATION EoulPMENT NAME DATE __Decemb er._15, 19 75 _ WORK REOUEST NO. PURCHASE ORDER NO. r - mmm r i il DESCRIPTION OF NoNCONFORMANCE Surveillance strand cannot be removed from Tendon H-25. Surveillance strands were i not identified so unable to identify both ends of any strands. j 1 F l l DESIGN REVIEW A D1 RtSection 50.59 review required. Y. Y. O e%b 3 jf /$ 75" N ,v e KI DISPOSITION (C/ sect (>nel \\ (k ACCEPT b REJECT O aEPAiR R aEWORx 0 aEPLACE IV DISPOSITION INSTRUCTIONS AND TECHNICAL JUSTIFICATION The initial disposition was unsuccessful in locating and removing a surveillance strand and most of the wedges have been unseated in the 9 strands tested. Remove the anchor heads at both ends, remove one strand for surveillance, identify and permanently mark both ends of 4 more strands for future surveillance specimens. Ship anchor heads to shop to be honeri for removal cf any possible burrs. Replace the anchor heads using new wedges. Align the strands to insure that old wedge teeth marks are within the grip of the wedges or beyond the free side when the strand is retensioned. t Yes Test No* / / This disposition will require o terest of the Systern/ Unit gg//6 y g f r-i W COGN42 ANT ENGsNEER (.),4 T E L 3 V ENGINEERING REVIEW BOARD trequored on att acceptfrepair disposi f \\%m .rfg7g ylNT EgL ,9g 9g DATE FN g L' 5 MUD pA NxArt -s CODE INSPEC10R D ATE /sf errpured) M AN AGER GENER ATION FNV.INEERING DhTE VI REPAIR / REWORK / REPLACE COMPLETE and ACCEPTABLE COOr INWFCTO A D ATF ftf recistrrJJ INSPECTOet / ENGINEE R DATE VIA RETEST COMPLETE and ACCEPTABLE TEST RESULTS APPRoVEo BY DATE t vil CAUSE CORRECTIVE ACTION Construction contractor did not properly Not applicable. Construction contractor's L. identify the corrosion surveillance work is completed. i ctrands. L h-Y c.hhu 3h /n-DISTRIBUTION .tlanager Generatinus EngoneerWt C9xief Eragineer (1J } Plant Superintendent (3J ShfUD QAD (I/ Orig.) L

O P r*, e t i T 6 f' [- APPENDIX C JACK CALIBRATION RECORDS P D4-Mb ? +- h L L Yi c. c, UNIVERSITY OF CALIFORNIA, BERKELEY , 'h "w BEREELET

  • DAVIS
  • IRVINE
  • 14$ ANCELES
  • RIVERSIDE
  • SAN DIECO
  • SAN FRANCISCO SAprTA BARRARA
  • SANTA CRUE n

COLLECE OF ENCINEERING BEREELEY, CALIFORNIA 94720 DEFARTMENT OF CIVIL ENCINEERING Diva 10N OF STRUCWRA1, ENCINEERING March 14, 1975 AND STRUCTURAL MECHANICS r-RECEIVED Mbb 3l IO;i VSL Corporation 1077 Dell Avenue V 5 L CORPORATION Campbell, California 95008 l Attention : Mr. Ed Davis

Dear Mr. Divis:

On March 13, 1975, two 908-ton hydraulic rams were calibrated in the Southwash-Emery, Universal Testing Machine, University of California, Berke'iey, as service-to-industry project E. S. 7381. The rams were marked as follows: PTD 908.6 3 1/2 - 37040 908.6 U.S. Tons at 8005 PSI EFF. AREA 227 SQ. IN. Vol/ Stroke 737 CU. IN. 375 F 313 PTD 908.6 - 31/4 908.6 Tons at 8005 PSI EFF. AREA 226.8 SQ. IN. C 409 872 ~ Each ram was loaded three times with the appropriate gages supplied by VSL Corporation. The tabulated calibration readings are attached as well as Figures 1 and 2, which are the calibration curves of the rams. We trust that this will supply the information which you wanted. Oer truly yours,f, kA( LO l Roy M. Stephen Principal Development Engineer F Enclosures i

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5 E CALIBRATION READINGS FOR 908 TON RAM CALIBRATED IN 4000 KIP UNIVERSAL TESTING MACHINE ~ UNIVERSITY OF CALIFORNIA, BERKELEY MARCH 13,1975 INDICATED RUN # 1 RUN # 2 RUN # 3 GAGE SMUD INDICATED l INDICATED INDICATED GAGE SMllD LOAD GAGE SMUD LOAD GAGE SMUD LOAD 1A PRESSURE 1B PRESSURE KIP-1B PRESSURE KIP 1B PRESSURE KIP PSI psi psi PSI 0 0 0 0 0 0 0 1000 1000 210 1000 21 0 1000 210 2000 2000 430 2000 430 2000 430 3000 3000 650 3000 650 3000 640 e 4000 3975 875 3975 880 3975 875 5000 4950 1095 4950 1095 4950 1095 .6000 5925 1315 5925 1315 5900 1315 7000 6900 1540 6900 1530 6900 1545 ~ 8000 7925 1765 7925 1765 7925 1765 RAM EXTENDED 1/2" AT START OF CALIBRATION 9 PTD 908.6 - 3 1/4 908.6 TONS AT 8005 PSI EFF R A - 226.8 SQ. IN. O b. 9 u

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  • i*\\Y i

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f r 1 P Pea [' APPENDIX D i

SUMMARY

OF LOSSES FOR CALCULATED LIFT-OFF [ [ [ M L ti e

_ i. _ _ -_. _ _.

i

SUMMARY

0F LOSSES-FOR CALCULATED LIFT-OFF 1975 (Second Year) SURVEILLANCE Rancho Seco Nuclear Generating Station, Unit No. 1 'All Forces in KIPS)^ RELAXATION LOSSES 't. Relaxation @ 30,000 hours.@ 86*F = 2.6% (Second Surveillance) -2.5% (First Surveillance) Relaxation Losses:from First to Second. Surveillance = .1%

  • 2.

Relaxation @'5,000. hours-@ 86*F.= 1 95% (Tendon H-114 replaced 4/15/75) ~ STRAND REMOVAL LOSSES Previous Lif t-off x 54/55 -(Tendons V-62-T, D-27-1D, D-27-27) Previous Relaxation. Reduction Calculated Tendon Lift-off Loss Due To Lift-off For Number 1st Surveillance (0.1%) Strand Removal 2nd Surveillance H-10 (1) 1630 -2 1628 H-10_(2) 1585 2 1583 'H-25 (1) ~ 1610 - 2 1608 1448 H-25-(2)- 1450 2 H-114 (1) 1620

  • 32 1588 H-114 (3) 1600~
  • 31-1569 H-26-(2).

1610 2 1608. H-26 '(3) 1565 2 1563 H-50 (2) 1700 2 1698 H-50 (3) 1610 ~ 2 1608 H-115 (1) 1575-2 1573 H-115 (2) 1495 2 1493 V-62 (T) 1575 2 29 1544 V-63 (T) 1475-2 1473 V-64-(T) -1585 2 1583 V-15 (T) 1550 2-1548 V-61 ' (T) 1475 2 1473-V-101 (T) 1595 2 1593 V-101. (B) 1520 2 1518 D-27 (10)1 1590 2 29 1559 D-27 (2D)l 1575 2~ 29-1544 D-28 (3D) 1565 2-1563 0-28 (40) 1630 2 1628. D-68 (50) 1550 -2 1548' 1628 D-68 (60) 1630- _ 2 1618 D-19-(ID) 1620-2 0-19 (2D) 1595 2 1593 0-29 (3D) 1640-2 1638 D-29-(4D) 1535 2 1533 D-75 (SD) 1575' 2-1573-1618 D-75.(60)

1620 2

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