ML19319D857

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Containment Structural Post-Tensioning Sys Surveillance Test Rept (First Yr Surveillance)
ML19319D857
Person / Time
Site: Rancho Seco
Issue date: 08/31/1975
From:
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
References
NUDOCS 8003260818
Download: ML19319D857 (69)
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y '( CONTAltf Bfr STRUCTRUAL POST-TENSIONING SYSTEM SLRVEILLANCE TEST REPORT (FIRSTYEARSURVEILLANCE) Rancho Seco Unit I Docket No. 50-312 Operating' License DPR-54 1 i 1 1 ' SACRAMENTO MUNICIPAL UTILITY DISTRICT j' a August, 1975 k' e --,-.-l-,,,,,-- ~-

CONTAINMENT STRUCTURAL POST-TENSIONING ~ SYSTEM SURVEILLANCE TEST REPORT l l l D.STRIBUTION LIST' COPIES Nuclear Regulatory Commission (Washington) 40 Nuclear Regulatory Commission (Region V) 1 I .E. K. Davis I f J. J. Mattimoe 1 I D. G. Raasch 6 1 R. J. Rodriguez 1 ) i R. W. Colombo 4 R. P. Oubre' I J. V. McColiigan l' D. C. Browning 1 D. Cass 1 G. Mitchell (B&W) 1 J. Hiltz 2 ~ Survelliance Procedures Flies (H. Heckert) 1 Document Control Center 1 Rancho Seco Library. I SMUD Main Library, 6201 S Street i Bechtel (c/o J. Hiltz) 1 'VSL (c/o J..Hiltz) 1 M + .,i-w - -- w-w - - g

d e CONTAINMENT STRUCTURAL POST-TENSIONING SYSTEM SURVEILLANCE TEST REPORT (FIRST YEAR SURVEILLANCE) TABLE OF CONTENTS PART PAGE i -1. INTRODUCTION 1-1 2.

SUMMARY

AND CONCLUSIONS 2-1 3. TEST PROCEDLi3-4. TEST RESULTS 5. ANALYSIS OF TEST RESULTS 5-1 6. SURVEILLANCE PROBLEMS AND SOLUTIONS 6-1 7. COMMENTS FOR FUTURE SURVEILLANCE 7-1 APPENDIX A DOME AND VERTICAL SURVEILLANCE DETENSIONING DOCUMENTATION APPENDIX B TENDON H-114 DOCUMENTATION l APPENDIX C TENDON H-25 DOCUMENTATION APPENDIX D JACK CALIBRATION RECORDS APPENDIX E

SUMMARY

OF LOSSES FOR CALCULATED LIFT-OFF 9 1

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? it. fi 5 ' p, . The test was' conducted in accordance with a written procedure which detailed test requirements, work methods, and.specified acceptance criteria. The test. procedure'is included in Part.~3 of this report. J L m

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Chanical -tests made on' grease samples taken~ from representative d:' + tendons confirmed that the grease properties have not changed ~. materially. k. i 4 _ s 'M enum 1 4 4 s e. 1 I L 7 l' 4 L e 2-2 v v <-6 .---a r c-wn - v-.r w, m e ,,ve-m---o-* w, ..r.m- - w,r e s er &n -+e4e~-- -~

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-) $~SMUD ~ SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, Box 15830, Sacramento, California 95813; (916) 452-3211 L RANCHO SECO NUCLEAR GENERATING STATION UNIT NO.1 ~ PROCEDURE CHANGE APPROVAL FORM Procedure Number SP 2 OS~m bb Title _j,,,,,.,,.,, j n,,,y. op c),, n u 'r a,... m Originator S, g, O ,,g.,E Date 3-f/-77 Approv AL? ///4 Date [. f "/[ ~ Gioup pr Recommend Approval by Plant Review Committee: Yes p(l No [ ] w Requested Change & /e f, ea,A c),reaf e. / ' }ean line S~ e S-x e +;ao 9*2

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Reason for Change l/ce-fie / cist,) O n n. fenefn.s nef Con f:e ut ee.) kr cle '/ees. ss,.,.. r Approved M-Dats k ' 7-3 Pt.nt R.wieuw Committ Recommend Review by Management Safety Review Cornmittee: Yes [ ] No [f] Approved h w Date 9 @ h' y eiwit su ri,*.ne.ni ~j 5 Forward to Management Saf; Review Committee: Yes [ ] No [() Reviewed Date u.n. n s.v.,y a.v% commeri SMUD-0366 12/74

? L: $SMUD SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S Street, Box 15830, Sacramento, California 95813; (916) 452-3211 RANCHQ SECO NUCf EAR GENERATING STATION UNIT NO.1 ~ PROCEDURE CHANGE APPROVAL FORM Procedure Number $'jOf Of,() 9 keQ 3 Title /,,, p,.,,e a f,, me f.on ,.,f G,,,.n,tpj L J,_, ~ Originator (; p /-),,,, 4 /g 73-- [g-J[ Approv / J//A Dae b'~ L-Group s4pervjforV ~ Recommend Approval by Plant Review Committee: Yes [Al. No [ ] Requested Change l. Dele fe 4% h,r,s,s, s,s C,/c.ulehe*, <> #1c.l t esl=.e r w.1%

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.n ar-J u ob Noo Yesc4n @ to 3 - - e/ en fle es in k f/<V +a / n Reason for Change 1, A/t, een.i..l e +,,, +,, ,,,,.n f eas.<//,se. 2, C A np r-feg sosu-e ir.- ~ J a, a ffa, e7%e d r e ouwd -fum Ase,s /- d n / / 9, Approved Dats @ lf Paent Reveew Committee Recommend Review by Management Safety Review Committee: Yes [ ] No [>(,) Approved o' Data 8 9 -)B Pta t' Superintendent Forward to Management Safety Review Committee: Yes [ ] No g] Reviewed Date Management Safety Review Committee $ MUD-0366 12/74

MF-R> p f.' o e;; ~ j SP 205.03 ~' . INSERVICE INSPECTION OF UNGROUTED TENDONS IN PRESTRESSED CONCRETE CONTAINMENT STRUCTURE ^ 1.0_ PURPOSE 4 Verify.the-structural integrity of the Containment Structure Post Tensioning System.

2.0 REFERENCES

.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-C12.05-35 & M9 File #6292-C12.05-36, 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 seated.by. tapping chucks with wood block. .5' -When lift-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. SP 205.03-1. 4 m...- m.

' 5 - j '4.0 : SURVEILLANCE TEST' PROCEDURE (Continued) D. - _ Bearing Plate and Trumpet - Visually inspect bearing plate ifor cracking, excessive deformation and movement into the anchorage. On those tendons which are detensioned, inspect trumpet for' grease coverage and physical appearance of grease. -E.- Strand - Visually inspect exposed 1 strands for broken wires, loose wedges and any indication of slippage into the anchor head. F. Bearing Plate Movement - The anchorages of Hoop Tendons 29, 53, and 112, Vertical Tendona 14, 60 and 190, and Dome Tendons l 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. 4 ) l' 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 seauence 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 l.2 i tendons must be detensioned in accordance with the procedure detailed on VSL Drawing 8M. Detensloring and retensioning will require simul-7 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 be 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 or pitting noted on Log Sheet 5. Samples from both ends and the middle of each of the 3 corrosion surveillance strands removed shall be tested to failure in tension 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 for melting point.per ASTM D127, chlorides per ASTM D512-62T, sul-fide ~per ASTM 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. t A representative grease sample shall be'obtained from one replace-ment' grease barrel (if allLbarrels are from same lot no.) and tested to - th'e ~above criteria prior to use, e SP 205.03-3 Rev. 2 . w - +. +- ,r, c., c.

n cq - .1 5.0. ACCEPTANCE CRITERIA ( Continued) C. Shims Inspection should reveal adequate grease coverage'and uncover no sign of excessive corro-sion or loss of functional capability. D. Bearing Plate and Trumpet Inspection should reveal adequate grease coverage and uncover no indication of excessive deformation or stress. No noticeable movement of the bearing plate into'the anchorage a .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, l .4 corrosion Surveillance: A. Single Strand Tension Tests - All single strand samples should fail above 41.3 kips (ultimate strength). B. Strand Corrosion Inspection - Strand must show no significant corrosion. Any area of significant or questiona51e corrosion shall be tested in-tension with acceptance per A above and the extent of corrosion defined. Any noticeable pitting saould 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. If the samples' tested fall outside the specified limits, further samples shall be taken and tested. If the additional tests confirm the initial tests, the grease shall be replaced. SP 205 5

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.,1 POST-TENSIONING SYSTEM LOG SHEET 1B Tendon Group Tendon Lift-Off Tendon Stressed to Elongation to SeC and Number Force .8f's = 1817 Kips Re tension SEQUENCE LoH i VERTICAL #64 (T) 3@ VERTICAL #15 (T) VERTICAL #61 (T') VERTICAL #101 h Q h Ih DOME #27 1@ hJ h h 2h DOME #28 2@ ~ h (h h 3h DOME #66 3@ i h DOME #19 g h DOME #29 h ~ DOME #75 j I i DATA BY: i DATE SP 205.03-11

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I 3 O l W l. i e . g w VERTICAL #62 1 W VERTICAL f63 2 w l ,9 VERTICAL #64 3 DONE #27 1 DOME f28 2 1 . DOME #68 3 Replacement Crease DATA BY I. .t e 9 0 l

7 I POST-TENSIONING SYSTEM ~ LOG SHEET 5 YEAR OF TEST SEQUENCE a-. v e. w c w.u. /. lll l 's ,s, I \\per%3'%' p; @@a Y~. ./ gg@4.>w cgg 'NN I v. w. frs( S.'iM.Y;O) dh ~~ .b6.*i/h)'2[( 3)N(9)hi@ 6 p Q4,)(o)if.)(z.Q(. ;)Q... -.-g ,g O O i[h({.$,(i kid 4.?)(d).~- ) I bMN)))& k)) h)

f. -9 9@.V@/

~ 2'c .ans p/. f- .) 1 I a. Tendon Nunber 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 provided to note the location and - DATA BY : 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. SP 205.03-15

-) C ij '

v

, r~ lic ENCLOSURE 6.4 RETENSTIONING CALCULATION n. - Retensioning to;be. accomplished to eloagation as. required by shim stock + 1/4" .3, (maximum load not'.to exceed.8f's). -Final lift-off to be recorded. 'f s 1 4 e f I SP 205.03-17 Rev. 3 + 4

, va#.WWW-N" P m: *t' W? -ir-w- ++A+ 7 =- w -*ue ~u 9 i.- w-l e ~d i M 4 M L .'e 1 ^' 4. TEST.RESULTS n I; 6 8 3 O d. 4 a

d.
  • J

-9 s k i 3 ). - it c V d m T' b 1wirYr < .q r n. ~ ~ - ~ ~. _. _ _,,., _.., _ _, n

1 1 TO: Socramento Municipal Utility District FROM: VSL CORPORATION, Los Gatos

SUBJECT:

Containment Structure Post-Tensioning System Surveillance for Rancho Seco Nuclear Generating Station #1 o Socramento County, Califomio 1.0 Dome Tendons 1.1 Tendons Surveyed: Lift-off on tendons #19, #29, and 75. Corrosion surveillance on tendons #27, #28, and 6 8. 1.2 _Date performed: March 24 through April 2,1975.

1.3 Comments

i No difficulties on lift-off tendons. Shims under anchor heads had been omitted at the time of initial installation of the surveillance tendons. As a result, the detensioning could not be performed with-out releosing the anchor head wedges. The corrosion surveillance strand was therefore the only element detensioned and was removed with a monostmnd rom. The five surveillance strands in each of the surveillance tendons were r.ot marked as indicated on the original installation drawings. Some cracks in concrete in all the corners of 4 bearing plates were observed. The cracks do not appear to have changed from the crack pattem shown ori SMUD Structural Integrity s Test Data Sheets 1 through 18. ~ 2.0 Hoop Tendons '2.1 Tendons Surveyed: Lift off on tendons #26, #50, and #115. Corrosion surveillance on tendons #10, #25, and #114. 2.2 Date performed: April 4 through Moy_12,1975. 2.3 Comments : No difficulties on lift-off tendons. Shims had been installed between onchor head and bearing plate on the surveillance tendons. Contrary to contract plans, the shim _ guide bolts were included on the second-to-lost shim. r -,ye-

}

a 5.0 - Anchorage Surveillonce u No' unusual conditions were noted on anchor hoods, anchor head wedges, shims and tw ng plates. All the parts were covered with grease and there was no t indic fw of corrosion, deformation or loss of functional capability. Visual ~' inspection of bearing plate indicated no relative movement with concrete. - 6.0 ' Reference Bar Measurements ~ ~ Reference bars on horizontal tendons #53, Southeast and 112 Southeast were domoged. Therefore, these measurements were inwlid. Visual in v tion ~ of bearing plate indicated no relative movement with concrete. ( / t Guido Schwager V W Page 3 of 3 pu-p,- + tw -'e wye ? -rie w-- - to e -e

l'OST-TENSLOMING LY', TEM LOG S!!EET la YEAR OF TEST, /97f g SEQUENCE _ / f R L7FT-OFF TESTS Tendon Group Tendon Lift-Off Tendon Stressed to b Elongntion to ( Scatd g and Number Force [#/M) .8f's = 1817 Kips % Re ten s i <>n 4 SEQUENCE Len v 171a & 12.82" /63o 1 (1). S'i HOOP #10 fSgf /CBS 0 /2 21' /SBS 1 Y / era ~ / /Mf &_ la. 42 /6/o 2 ht HOOP #25 /SSS V $dY &_ //. 37f " /4fo 2 /fCf /

  • le/7 @ *//. 74 # */6fo 3 (lb E HOOP #114 h

/E7f h / 3 (1 N 38 ~1917 @ *)f. 59 " /Cao / HOOP #26 /f/o JECC HOOP #50 h__ /7ao /dlo HOOP #115 /E7f ust _ VERTICAL-#62 /f75 h b b 1 k__ 2 k_ VERTICAL #63 /478 @ NOTE: @, @ or h indicates buttress number h or h indicates Top or Bottom of Vertient Tendons ), h, h or h indicates end number of Dome Tendons Elongation shall be measured by simul taneously.tressing cach end of the tenden to 107. of the specified jackinn force r. nil irarking the tendon with a tape marker on two stranils. Elont.. tion ahall he the differcuce in readings from the Datum to the total elongatton prior to sea ti.ng.

  • OMA FECM ' RC)*LMcB

/~f D f o x) DATA ni: _ _ _ Iwrie,,f,_7_, -/f

f: m 9 POST-rFNSl(WINC SYSTEM LOG SilEET 2 YEAR OF TEST /S7f SEQUENtt / AFif0R/.CF, f:URVEILI.AtJCE Cnniainm nt _ _m_ Tendon Group Interior NL ido Cresse Anchor Heads Concretc & & Pearing and Nurber Tef: p. 'F Temp. 'F Temp. 'F & kiedps Anchorages Shims Plates d //f fl - $3 HOOP 010 2 ffs 71 C2 e v s a / /e8 S2 64 4 HOOP 025 t Jat 32 K2 v / l 78 SA S8 HOOP 0114 3 78 XJ E9 a 2 /o8 So Go v HOOP 026 3 14 1/ C2 / v 9 1o8 - 4G S8 v. / HOOP #50 3 ff 32

  1. 7'

/ h / /of S2 62 / .i HOOP D115 9 AS S1. CS v v VIRTICAL #62 I //S Ea K9 or VERTICAL #63 7 //f g3 gp v / VERTICAL #64 f //p gg g2 VERTICAL #15 T //S If tg o V V VERTICAL #61 I //S 47 f_9 T VERTICAL #101 3 //0 _L (t 2 82 S8 62- / v V DOHE 021 / 77 Ks cf v v 4 78 39 52 v / g t DOME 02S S Bf AR tr / s. c 82 AC $8 e DOME 068 f A2 XK ff y v / / 2 Bo CS $8 v v DOME #19 /_ #g JS _Jg v v d 86 S4 6S V v DOME #29 3 #f IP r2 y Z 82 SS 62 v / DOME 015 6 78 E3

  • e v

NUTE: Any unusual condition noted during the surveillance shall be detailed on Log Sheet 5 No t/Abdeft/RL ' COAd/7/OA/S J)o rf 7', DATA Bis A (( DATE /v/ = 7e ~ 6 +

  • a N

Tw-w v 3

.:1 2 13S '~ES'~~ NG. A303A'JOI 3S ~ TESTING 8 INSPECTION SERVICES LABORATOAJES REPLY TO ~ OAK LAND 984-6900 AREA CODE 406 SAN JOSE O 3185 NORMAN AVENUE D* sawTA ctARA,cAUFORNIA C5050 uowrtan-sAuwas MN FRANCITO May 30,1975 HTL.NO. SD-859-2 CORRECTED REPORT LAB NO: 1274 PROJECT: RANCHO SECO SURVEILLANCE 1975 ~

SUBJECT:

Tension Tests on Seven-Wire Stressing Strands MATERIAL: Nine (9) 1/2"5 Seven Wire Strands DATE RECEIVED: May 16,1975 _ REPORT TO: VSL Corporation P. O. Box 459 Los Gatos, California 95030 REPORT Gage Length (%) Section Area Yield Strength Breaking Elongation in Mark (Sc.In.) At_1% Extension Strength 24 Inches 62 Center 0.1539 38,820 43,150 5.2 27 End 0.1537 39,100 43,000 5.2 62 End 0.1541 39,210 43,000 6.0 114 End 0.1529 39,400 43,450 5.2 27 Center 0.1527 39,000 43,250 6.2 27 End 0.1527 38,940 43,150 5.2 62 End 0.1547 39,360 43,300 6.0 114 center 0.1534 40,000 43,550 5.7 114 End 0.1529 38,940 43,950 6.2 Respectfully submitted, HALES TESTING LABORATORIES ByY ))A i., ivil/ss cc VSL Corporation

42 MORSE LABORATORIES. INC. CHEMICAL ANALYSIS AND REstARCM 1935 PuttOM AvsNus ~~* SAcnaastNTO. CALIFORNI A 99489 488 3148 May 13, 1975 ~~ VSL Corporation P. O. Box 459 Los Gatos, California 95030 Laboratory No. 94831 Date Receiv3d 4/30/75 Sample 3 Samples for Flash Point, Drop Helting Point, Chlorides, Sulfides, Nitrates Tests

  1. V-62 H#114 II #1-27-1 Flash Point (ASTHD-92) 3820F 3930F 383 F l

Drop Helting Point (D-127) 1560F 1500F 1610F Chloride (Cl) (D512-62T) 2.6 ppm 2.6 ppm 2.6 ppm Sulfide (S) (D-1255) < 1 ppm < 1 ppm < 1 ppm Nitrata (NO ) (D-992-52) 0.9 ppm 1.1 ppm 0.7 ppm 3 MORSE LABORATORIES, INC. hl-t't 't fb,Lt.A 30 0 Marjorie L. Dewey Director MLD:db l l

.r y m '4 j x 1 J POST-TENSIONING SYSTEM LOG SHEET 4 Year of Test /fff TENDON NO. REFERENCE BAR MEASUREMENTS j 14FT._ - _MIDD i., RT fmT INIT. SURV. DIFF. INIT. SURV. DIFF. INIT SURV. DIFF j i i Hoop #29 i ~ Hoop #53

1. -

Hoop #112 i i t Vertical #14 i ~ e Vertical #60 f i l Vertical #100 Dome #18 I Dome #74' Dome #30 Data By: 4 - n - If SMrA ON lOC ffdinF7 4 A, Date &cc / ro /8* 6 e 9 ~ >-,e-

m. c-Gi o C2)J

]. SACRA.'.iENTO MUNICIPAL ' UTILITY DISTRICT. l$ j,g fgg.g7 f,;g j { e, run e g.:7 DATE j ~, STRUCTURAL INTEGRITY TEST '~' End Anchor Surveillance oErT. i Generation Encinceria' ~' 'EY I REFERENCE

i..
. * '.

STP 006 ~ Horizontal ,,3f'*.g. 7DO TENDON TYPE ~~ eve r tii cal _,. 7 Tendon No. 4. EMD'- /' Dome ~ (n,_.f- '*: L 1. Baseline inspection Data. m'j* *' OVSERVED CRACKS 2. Peak pressure inspection Date 6 % L 7 % (." 7# " '3. One to three days after stru- / cture test Date 7f~ca W 2 4. Surveillance Date /./ ~.1Y b e 1 Time 9e' O k. //), ' Exterior Concrete Temp 6 3" Interior Temp ~/O " ~ '2 Tir.e. 2 05'O Exterior Concrete Temp 48)* Interior Temp S 2.# 3 Time /d30 Exterior Concrete Temp 65" Interior Temp '78" i \\ 4 Time /4'.** Exterior, Concrete Temp .l*8* Interior Temp //o

  • a A5.1ReferenceBarMeasurementsTakenAccordingtoSketch REFERENCE BAR MEASUREMENTS D

Left Middle Right 1. Base Line 2, s'o 9 !.4 Iw a. 6 -/.o 2 Peak Pressure 2.. m v. /,u20

2. 47a.

~ 3 1 to 3 days after S.T. 2..T v 2 /. v2 / 2 674 4 Surveillance . f. 4fIo /. #f/

f. 7//

Crack Sketch _ * ]N f (,.li. CI /ifi tc A li O d WI ,] 1 t 4 LEr'T-PN MtDDLE .-( i ~} RW RT" (,f, f {(E. { hl((, ?,,I.' SMUD PP.1$ Un2

m i ) & Ad ?O:0 & g SACRAMENTO MUNICIPAL UTILITY DIOTRICT h c, /b g,g fj,rapy-gg p.,, SUSJ:CY F oATE STRUCTURAL INTEGRITY TEST t i., End Anchor Surveillance oEPr. Generation Engineerf f~ SY A REFERENCE lf' fot)L w STP 006 ~ Horizont'al TENDON TYPE Vertical Tendon No. 6 EMD /b. //dUY ~ ~ O ' l. Baseline inspection Datn- ? ~ OVSERVED CRACKS 2. Peak pressure inspection Date >, ^ - ' g 3. One to three days after stru-cture test Date_29 ~7 4 ( 4. Surveillance Date 7-2,P-7f ~ iT-s '1 Time 100 E /A Exterior Concrete Temp ' 55

  • Interior Temp

'7 7

  • 2 Time C % W Exterior Concrete Temp 37*

Interior Temp 8o" 3 Time /O 4/ 6' Exterior Concrete Temp $7* Interior Temp 7~7 4 Time

8..To Exteri-

..srete Temp #2* Interior Temp BS' i All Reference Bar Measurements Taken According cc Sketch R'EFERENCE BAR 1EASUREMENTS s Left Middle Right i 1 Base Line

0. U '

/.04I a.12 4 + 2 Peak Pressure o,9c8

7

?. ' ' ' >. _ n 3 1 to 3 days after S.T. C ';GO /.04/ o o 2 5 '" O. 5 4, Surveillance [ o.SAS ?.o#P o.8 08 O9N Crack Sketch rn. s ti Wg P= m umog k. r-m aar ~ [h SMUo PP 15 602 t.

Q.. ** 6 2.3 U D RANClio SECO UNIT 1 ' SACRAME!4TO MUNICIPAt. UTIUTY DISTRICT /dB# '4Il# b P.,. of 1 susJECT DATE STRUCTURAL' INTEGRITY TEST ~ End Anchor Surveillance oErr. { Cenera ion Engineeri ~ sv 4 R E F E R E P'CE

0. w..

oortrEh TENDON TYPE Vertical Tendon No. 6 EMD 1f.nI

  • c.. n.,,... r *

/.^ Dome t ' 1. Baseline inspection Data.2*1" " t ~ OVSERVED CRACKS 2. Peak pressure inspection Date T '3 0 ~7 0 C.M .7,fre 3. One to three days after stru-cture test Date 9Fcs; '74l dM f. 4. Surveillance Date &- /r-7F "N .f0 M.' Exterior Concrete Temp K5* Interior Temp _ 80* 'l Time '2 Time 1 03T Exterior Concrete Temp h3 Interior Temp

  1. 2. #

3 Time @lO Exterioir Concrete Temp 4 '/' Interior Temp 7 '# ' 4 Time /_T I* Exterior Concrete Temp [o Interior Temp /o8 All Reference Bar Measurements Ta'asa According to Si etch REFERENCE BAR MEASLE!ENTS Left Middle Right L Base Line I. 4 Cie I_ . ~. t I p-+ 1 >2 Peak Pressure /Wsi

s. 6 r. e f.u //

3 1 to 3 days af ter S.T.

1. tM, 2.

/. (o o 3

1. 4 s 4

Surveillance /.90i /. 6 /o /. 9 /p Crack Sketch' fJn C C '. c q@N 90 c e,1 c ,o r 2. t- -9 t.crr P m vanotc i ) RW RT" se

)

RANCHO SECO UNIT 1 i .g)amgD .{ SACRAFAENTO r/UNICIPAL UT!!.lTY DISTRICT gg [pffy gp

p.,

h' ,, / 7 SUBJECT DATE I STRUCTURAL INTEGRITY TEST ~ ~ ' End Anchor Surveillance o Ee r., s { Generation Engineer 1 Q ".1..-\\u. VW STP 006 SY A fi REFEMENCE Horizontal-TENDON TYPE Vertical Tendo'n No. 4 END - ') 60CT.4 G%

  • >. l. ] A. - - ($ A-1.

Baseline inspection Dat n. + ' ' - OVSERVED CRACKS 2. Peak pressure inspection Date .. e i ' '..'. 'O 3. One to three days after stru-cture test Date f-9 ~7 d. (_ cg7 [ ,e 4. Surveillance Date 1 7 f-1 Time /Nl Exterior Concrete Temp I/' Interior Temp 77#

  • 2 Time ' 3'/ ^

Exterior Concrete Temp II* Interior Temp 8O~ 3 Time //2.5I" Exterior Concrete Temp 6'[ Interior Temp 78 4 Time /. 2e /// Exterior, Concrete Temp f2* Interior Temp 8f' Ai1ReferenceBarMeasurementsTakenAccordingtoSketch REFERENCE BAR MEA 5JRDIENTS a Left Middle Right 1 Base Line /. ; >. ' /./cs /. / ?.c 2 Peak Pressure ./ /, !,9 , / '. 1 3 1 to 3 days after S.T. /. / =3 '4 /./6.o /. / z H 4 Survci11ance _ f. /83 f./SS /. / 2 5 A i Crack Sketch g5 .6 Cpn o > r -- M Lerr l d tw ~- l F -3 MtDDLE -~ 8 i__ - 1 RsG RT-

f r,

a

~' g RANCito SECO UNIT 1 Gl%DD u g~ SACRAMENTO MUNICIPAL UTILITY DISTRfCT gg fgg gp,.,,, /O,, /h susact STRUCTURAL INTEGRITY TEST ~ End Anchor Surveillance o u r. ~, Concration Engineerine k),,;fy,j STP 006 Horizontal) x CYe'r'tTc'al TENDON TYPE Tendon No. 6 D.'D T?> E *' "* '.'7~~ Dome l g t ~ 1. Baseline inspection Data. " ' ' L' "I OVSERVED CRACKS 2. Peak pressure inspection Date /- 1 '3. One to three days after stru-eture test Date A-9 -7 d .c [UM r 4. Surveillance Date V - E-7f .u ~ '1 Time CT: ' Exterior Concrete Temp N Interior Temp ~?7' '2 Time 3 4.**' O Exterior Concrete Temp I*}**InteriorTemp 'Y 3 Time l'35 Exterior Concrete Temp 6'2' Interior Temp

  1. 77' 4 Time 8"

Exterior, Concrete Temp /M

  • Interior Temp

/o8

  • o s

All Reference Bar Measurements Taken According to Sketch REFERENCE BA1 MEASbREMENTS ~ Left Middle Right 1 Esse Ltne 186I .ils 1.r:-.1.. / 2 Peak Pressure 3 1 to 3 days after S.T. /. F//E 1.6 / 'l /. D V / 4 Surveillance /. d'ST /.6/2 /. 2. 63 N Crack Sketch CAcf5 Y r_ 46 do cp d d>M a dc >t-' s t.ccr LL lF"'~'s Msnocc

p. Repyggscp Egg f4M4fr Mr.c}dECMrptf /NFA4/Uf.

r~--

p,w N/xx4./DWecifor er EasRAtle lt C f3 PZArc Ausa
c.pgp no Adzsiwe

~

  • E Ner/MSN7 N/r# CONcZ4'f f,

4

e, . $.s.simg) RANCilo SECO UNIT 1 SACRAMENTO MUNICIPAL UTILITY OfSTRICT gg fgg gp p.,. SUSJECT DATE STRUCTURAL INTEGRITY TEST End Anchor Surveillance of er. Gencr'ation Eneiner _._ ev k, p f.s AEFEMENCE STP 006 Horizontal TENDON TYPE Qeitic'aD Tendon No.E,.EMD'p;O Dome 3. e -/- Data. -/. g. ")$ 1. Baseline inspection ~ OVSERVED CEACKS 2. Peak pressure inspection Date S-G Pl',) M ( h 3 3. One to three days after stru-eture test Date / i -l e 4. Surveillance Date // 73~ '1 Timeb .Al. ' Exterior Concrete Temp 62

  • Interior Temp 77
  • 2 Time M;ry]9.r.1 Exterior Concrete Temp- /rO** Interior Temp SE' 3 Time / O 3 P Exterior Concrete Temp 8.3 '

Interior Temp Y O 4 Time /// ** Exterior, Concrete Temp 58

  • Intarior Temp

//o *. e AkiReferenceBarMeasurementsTakenAccordingtoSketch REFERENCE BAR MEASLKEMENTS 9 s left Middle Right 1 Base Line .<. ' e i."M I.qn 2 Peak Pressure 7.4? /, /. 2. 2 2. /.4 4. 3 3 1 to 3 days af ter S.T. ~i. #4 /. 1. 2 s /. 9 4 J 4 Surveillance

1. So 2

/. ## /. S/S Crack Sketch . f y I c g. n t.; n c ; %,s h a '. n ti u e. 1't - - 7 1.CFT" r=e- -3 ggooty h ( n ;.,*- l'. ')**

i. *..

.=.

i.sg RANCHO SECO UNIT 1 n ~ L*k 5 .)' SACRAMENT 3 MUNICIPAt .h ~ . UTILITY DISTRICT g g- [p g 7-gg p.,, g ,, M, SUSJECT DATE STRUCTURAL INTEGRITY TEST i End Ancht.,r Surveillance - ~ ~ oser.hation Enginect Gene DY (), &* ~l & r REFERENCE STP 006 \\ Horizontal ' 8 g'.,,, -- TENDON' TYPE Vertical TendonNo.6EMD /, TDoEc 3 Data."-l 7-l ii Io.' .l. Baseline inspection OVSERVT.D CRACKS 2. Peak pressure inspection Date." - 3. One to three days after stru-Date_ 2 7 Y-( aft cture test ^ e 4. Surveillance Date .T- # 9-7f .u g 1 ' Time /' M. ' Exterior Concrete Temp f5' ' Interior Temp 80* ~ 2 Time - /) P/ '." Exterior Concrete Temp 3 T Interior Temp _ 90' 3 Time //00 Exterior Concrete Temp Y Interior Temp 77 4 Time ."I % Exterior. Concrete Temp (S

  • Interior Temp 78 *

? hilReferenceBarMeasure.mentsTakenAccordingtoSketch ~ REFERENCE BAR MEASUREMENTS b Left Middle Right 1+ Base Line !.0 0 2 -

?. i a rw 2 Peak Pressure 3 1 to 3 days after S.T. / 09/

/. 2 2,*/ O.09% 4 Surveillance /.032 /. 72 /,/ /.e82 b i Al {J Crack Sketch

3. 15

[ [3 .b E/ .e r-1 [pJ r\\ go I t"" ~ M L CW 48 '/ l f== =1 MtoDLE i i m \\bsst O'; .~.e -[G ^ a.. ~ t< 'y

7-qy.amgD m.u,~ .n.w unas s ^ SACRAMENTO MUNICIPAL UTILITY Of5TRICT /g fyy7 g g pm /[ /h c, I susJacv (. STRUCTURAL INTEGRITY TEST End Anchor Surveillance .r o u t. i Generation EncincertB SV REFERENCE STP 006 Horizontal TENDON TYPE (fe~rti@ Tendo'n No. 6 EMD ../ N O b o UO% ' Dome 1. Baseline inspection Data. / 9 /,]f-f.) OVSERVED CRACKS 2. Peak pressure inspection Date.. 5 ed ..,gd..t.'4184 4. 3. One to three days after stru-cture test Date 2' *l 'M (2 LE. 'H. H.a f 4. Surveillance Date 4 F = '1 Time M / O ' Exterior Concrete Temp b Interior Temp ~/d " '2 Time 3)OO Exterior Concrete Temp 4S* Interior Temp _._ S 2-3 Time t 17 o Exterior Concrete Temp 57s Interior Temp '77 4 Time /// *_* Exterior. Concrete Temp E8' Interior Temp //o * (.. A5.1ReferenceBarMeasurementsTakenAccordingtoSketch REFERENCE BAR 1EASURDENTS B 1.cft Middle Right ~ 1 Base Lfne /.Y/ 0 /. 3e '/ /.2p / W/S MW'" //' f3 2 Peak Pressure 1.413 / < /r / 39,f, 3 1 to 3 days af ter S.T. i s 2. /.3,s- /. 3a.3 ~ 4-Surveillance _ /. 37,f /. 9/4/ /. 4/o 9 gr ' Q J f, h,.? Crack Sketch \\.Q '.;s,. -= h% 3 g .._ : _4 y = te =t giong.c h ' 3.- gs - r ---- - -} pt,gs ar, t., . \\ b a x - +n ~. ,, u.,.,, S.h\\ ,fK 'R**~l'.+\\ MlT A / ~4'l-

l!- . EdMUD' RANClio SECO UNIT 1 ~ ' SACRAMENTO MUNidtf%f. UTILITY DISTRICT gg f p f g 7 g g p,,, kj ,,/h nuency oATE STRUCTURA1; INTEGRITY TEST .g. End Anchor Surveillance ocer. Ceneration Engineer # h-h--f,.. STP 006 ' h'tical"~ zon t'al) TENDON TYPE Gr Tendon No.d 64D //' ~ ., "> 'I " ' C Dome Dato

.L

. 2A^ I \\ ~~~~~~ o. :. ' ,e ~ 1. Baseline inspection OVSERVED CRACKS 2. Peak pressure inspection Date 3. One to three days after stru-cture test Date W *)-7N h EH T" e 4. Surveillance Date a.4r - 7f 4 s 1 Time 9:2 O A/d Exterior Concrete Temp dY Interior Temp '/#I ' ' ' " ^ ' ~ '2 Time Exterior Concrete Temp f 2-Interior Temp "YI 3 Time //MS Exterior Concrete Temp 5 8" Interior Temp _ '73 4 Time O/_ (a Exterior. Concrete Temp M Interior Temp M s go / c> 7' ~ Ah.1ReferenceBar}!cacurementsTakenAccordingtoSketch REFERENCE BAR 1EAS11RDENTS o Left Middl e Right e 1 Base Line I>K ,s.:,

t. g j f, 2 Peak Pressurc

~ ,. / :.- i 3 1 to 3 days af ter S.T. /. 2 n r. /,347 i, 4 i c 4 Surveillance rs?

5 7 fa ; -

-. = /. ;,' 83 ~ / 40/ Crack Sketch' gciq {u c' / C Y5% 0 8 N ..,oA lII -7 9p) .I,, CiQ . /j. ? i i r-mm t., n - f {:?.. t f=- 3 rsso ns.: s & f6fCR&Cd Ef f~-'~ " "" '~ } Q yu n ~ HCA/4/fd"MdNrf /NM /N E . :s s'/.rusz /pspsinoe oP 8 " R/h*~ NY' 'N

,\\'

& # /~e /p//c~A.pcf Aro Adk M7'/re'~ 5 Norsgder* N/rw coverers i s

) _j . *N.1,f o POST-TENSIONING SYSTEM Y J un ~ LOG S!!EET S YEAR OF TEST /S7f [,B _h .. e SEQUDICH / - id. sk V$1. wc tv.e.. . ( Q.. _ iI, s l t I .c. c = m s., 6 C /c2mm 7a ) @g@u.(nu).&.: ocewoo fonwud I w~ eMMM.wc@s>c %.h .O.C':b';.M&W'i%'Y(@ .._.q, 4 g$r)p%t %ib6@: 9 ) ;gg(,,,)g.._..,g, 0 ~ } 3@?.3%) i f.J PA@ f ( m==c. - / r I y/ ..( r \\ J..---. / j 'I ( w Tendon Number /- #7-2 [pogg) Tendon End COMMENTS: jhip sinm siis rwonnstsamt Ajor x 2 e 1suorejr firmw F2 9 rarro nen smAcen ac.PNown no m'PolvoD. Chrsiv 14DerAs w h2nn isn/sormr L;nsres-Mrs d*f1AM mnj.mo Pur1.sra sr>es 1)Tf'A s n f ibPAess71 P' A/Afz~r2)' NOTE: 1. Contractor shall identify by color code on this sheet, the location of cMor coded surveillance strands for the corrosion surveillance tendons and r. ark the location of the single strand reneved for corrosion inspection. 2 Any unusucl conditicn noted during the surveillance program shall be recorded on this forrt with details provided to note the location and DATA BY: describe the festures of the condition 3 - 5/ - 7S 4 noted. DATE 3. Corwents o'etailing the condition of the strand removed for corrosion inspection j and tensile testing shal.' be included on tM n re, r.

4 e a POST-Tr.NSIONING SYSTEM LOG SitEET 5 YEAR OF ' TEST /9 7.f" .-( SEQUENCE / V3L WexWr.ey. ~ f: } 3 ll

l s

~ r } \\ p.-= ~.s (e)(c.VJJoh)e@,' ! Y ' ' (oXe I h')*m. 6.h(*$iN)@nll@)L'.Qh @) 0* (':DT M E % h 6 m.,. 4('Mi 967) }*hUs)M)(d) ~gg9 9p .,.y i N(U)6 A0h?.)h@/ l I.b '}6 'J W .o I / f i .f / [ w. ~ f w Tendon Nusber 2-29 A f.4kMg-) Tendon End COMMENTS: no svD1/AWAJ 7912 kJMODJ rarse.Nos J&ssymsssm's.Prsa ris n> Ja m sesir A m 1 NOTE: 1. Contractor shall identify by color code on this sheet, the location of color cod d 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 proc,T un shall be recorded on this form with details provided to note the location and DATA BY: describe the features of the condition noted. DATE S - PR - F 3. Comments detailint, the emdition of the strand removed for corrosion inspection and tenslic testing shall be included on this form.

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~ POST-TENSIONING SYSTEM LOG SHEET 5 YEAR OF TEST /.92f" (- SEQU1MCE / Vit. WC.or.c. h {>~ ......._._.....,,q;...._._ ll' .g s j 4

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. <.1 ~ f f I <s.c=" 9,, ' p)@@ v. s' 4-I @(4,.9xe.: w =. @t.sc M w @cn@en 3 .StMF:59#iHste) d G - 3 +6 q b 3p_b g y @.-- .,..o. i. G.t 1..- 3 :]j : ) @) ry f>h)@'/ / Y, r u ,/ w Ag t. \\ 3 w. y. Tendon Nusbee _2-co-d'(fo/pp) j Tendon End ,4 CONNENTSt na n= ~ ><sars /~ms>DsneD.! Der *M ~ -n,,-- m - - Ainn - - - - - n n r 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 ,k corrosion inspection. 2. Any unusual condition noted during the surveillance program shall be recorded on this form with details provided to note the location and DATA BY: describe the features of the condition

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DATE 4 .3 - X 3. Comments detailing the condition of the strand. removed for corrosion inspection and tensile testing, shall be included on tnis form.

G. i POST-Tr.NSIONING SYSTEM LOG SHEET 5 YEAR OF TEST /9fe SEQUENCE / v u. w e.re..r. t g. ........_....I,;..__.____...___..._____.._ l ll~l s r .}. - l- .; q, h bY (i) 6,'.',g.@. gg) (bye l y,..y:m. (h)(-($i.'D$16, (9)kh ND ~~hhk (- k .4 I )) (b)Q .Oi.- d4 .' } Gj) }.* a us / . o, .~s / g I / y ,/ .J ...._._._w l . e., w Tendon Nusber ft ##ET/ cpg Tendon End ros COMMENTS: _jja mwswjt rmissnojjf jjorss O 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 provided to note the location and DATA BY: describe the features of the condition noted. MTE 4-M-Zr 3. Comments detailing, the condition of the strand removed for corrosion inspectio's and. tensile testing, shall -be inc.lueled on thin fo ren

C' b I $ SACRAMENTO MUNICIPAL UTILITY D suun 1708 59th Street, Box 15830, Sacramento, Cahfornia 95813:(916)452 3211 l 4 The Acceptance Criteria for Test Procedure SP-205.03, Inservice ~ Inspection of Ungrouted Tendons in Prestressed Concrete Containment Structure",has been reviewed by me. I find all the data within the Acceptance Criteria as stated in Section 5.1, 5.2, 5.3, 5.4 and 5.5 of the Test Procedure. 5 l2-1 $ Joh-[Hiltz P Pribeipal Project hngineer

ym.- v C N1 L ks I i 5 e k awas ,A 5. ANALYSIS OF TEST RESULTS 9 4 9 4 [ s. 3 ) ,p-m- m - n

uU ~ ANALYSIS OF TEST RESL*LTS Tendon Force Minimum Accept-Maximum Accept-Percent Tendon At Lift-Off able Lift-Off able Lift-Off Actual Diffarential Number (Calculated) (-5%) (75% f's) Lift-Off From Calculated H-10 (1). 1516 KIPS 1440 KIPS 1704 KIPS 1585 KIPS +4.5 H-10 (2) 1577 KIPS 1498 KIPS 1704 KIPS 1580 KIPS +0.2 H (1) 1571 KIPS 1493 KIPS 1704 KIPS 1555 KIPS -1.1 ~ H-25' (2) 1406 KIPS 1336 KIPS 1704 KIPS 1565 KIPS +11.3 H-114 (1) 1605 KIPS -1525 KIPS 1704 KIPS 1575 KIPS -1.9 H-114 (3) 1542 KIPS 1465 KIPS 1704 KIPS 1600 KIPS +3.8 H-26 (2) 1426 KIPS 1355 KIPS 1704 KIPS 1610 KIPS +12.9 H-2C (3) 1328 KIPS 1261 KIPS 1704 KIPS 1565 KIPS +17.8 H-50 (2) 1547 KIPS 1470 KIPS 1.J4 KIPS 1700 KIPS +9.9 H-50 (3) 1610 KIPS 1530 KIPS 1704 KIPS 1610 KIPS 'O H-115 (1) 1567 KIPS 1489 KIPS 1704 KIPS 1575 KIPS +0.5 H-115 (2) 1456 KIPS 1383 KIPS 1704 KIPS 1495 KIPS +2.7 V-62 (T) 1490 KIPS 1416 KIPS 1704 KIPS 1575 KIPS +5.7 V-63 (T) 1472 KIPS 1398 KIPS 1704 KIPS 1475 KIPS +0.2 V-64 (T) 1493 KIPS 1418 KIPS 1704 KIPS 1585 KIPS +6.2 V-15 (T) 1511 KIPS 1435 KIPS 1704 KIPS 1550 KIPS +2.6 V-61 (T) 1458 KIPS 1385 KIPS 1704 KIPS 1475 KIPS +1.2 V-101-(T) 1523 KIPS 1447 KIPS 1704 KIPS 1595 KIPS 44.7 V-101 (B) 1523 KIPS 1447 KIPS 1704 KIPS 1520 KIPS -0.2 D-27 (1D) 1512 KIPS 1436 KIPS 1704 KIPS 1590 KIPS +5.2 D-27 (2D) 1512 KIPS 1436 KIPS 1704 KIPS 1575 KIPS +4.2 D-28 (3D) 1355 KIPS 1287 KIPS 1704 KIPS 1565 KIPS +15.5 D-28 (4D) 1490 KIPS 1416 KIPS 1704 KIPS 1630 KIPS +9.4 D-68 (SD) 1531 KIPS 1454 KIPS 1704 KIPS 1550 KIPS +1.2 D-68 (6D) 1466 KIPS 1393 KIPS 1704 KIPS 1630 KIPS +11.2 ~ D-19 (1D) 1514 KIPS 1438 KIPS 1704 KIPS 1620 KIPS +7.0 D-19 (2D) 1447 KIPS 1375 KIPS 1704 KIPS 1595 KIPS +10.2 D-29 (3D) 1482 KIPS 1408 KIPS 1704 KIPS 1640 KIPS +10.7 D-29 (4D) 1459 KIPS 1386 KIPS 1704 KIPS 1535 KIPS +5.2 D-75 (SD) 1514 KIPS 1438 KIPS 1704 KIPS 1575 KIPS +4.0 D-75 (6D) 1455 KIPS 1382 KIPS 1704 KIPS 1620 KIPS +11.3 i e 5-2

M 'IJ t a "N 6. SURVEILLANCE PROBLEMS AND SOLUTIONS M e w h I 6 m

~~ m. J findings and steps taken to correct the damage and eliminate the chance of reoccurrence are detailed below. Tendon No.114 is a corrosion surveillance tendon running from Buttress No. 1 to No.' 3. It was installed with a stack of seven ~ (7) pairs 'of U-shaped shims between _the bearing plate and anchor head to allow detensioning and strand removal (refer to VSL Drawing No. 11594-10 which is included in Appendix B in VSL's report on Tendon No. H-114). On April 4,1975, stressing equip-. ~ ment was installed on both ends of the subject tendon and lift-off was performed in accordance with the test procedure. Subsequently, the tendon was successfully stressed to.8f's. To allow removal of the first pair of shims, an elongation of 3/8-inch to 1/2-inch was found to be required to clear shim guide bolts. After the first half-shim was removed, the ram was extended to its full travel and recycling was required because the position of the pulling head wedges did not; allow enough stroke to clear the guide bolts. The previously removed half-shim was replaced, the ram retracted and the pulling head repositioned.- With the pulling ~ wedges saated, jack _ pressure was applied and the ram extended to permit removal of both shims. At a stress level'of.819f's, one-half shin was removed; however, the guide bolts on the mating shim required slightly more elongation to disengage. Shortly after removal of the first shim, as the ram continued to extend in order to remove the other half-shim, several clicking sounds ~ vere heard followed by a sharp pop. The stressing operation was halted immediately and in an attempt to decrease the tendon stress, jacking pressure was reduced. The anchor head moved inward and was seated on the uneven stack of shims (see VSL Drawing No. 11594-11 in Appendix B). In this position, several strands were placed in severe bending and subsequently failed. The tendon was left in this condition for three days and was then detensioned from Buttress No. 1. Once the tendon was detensioned, _the anchorage hardware was removed and the tendon was pulled out and a new one was installed. A. Cause of Railure On the assumption that the shims directly benesth the anchor head were not engaged in guide bolts, the stack of shims . between the bearing plate and jack was dimensioned to allow removal of all shims under the anchor head. Dice the presence of the guide bolts was discovered,' additional jack chair shims should have been installed to provide sufficient clearanca for the anchor head to travel an additional 3/8-inch to 1/2-4 inch. Instead, jack pressure was applied evea though the anchor head was unable to move. This conditioG is illustrated on VSL Drawing No. 11594-10. As pressure continued to be applied above the.8f's level, some wedges were unseated -(clicking sound) while others.were unable to unseat because ~ of the presence of the retainer plate and/or increased force required for unseating. At this point, one or a combination of the following took place: 6-2 a-c

for this anchor head could not be certified' and the head thickness did not conform to the original design. However, since this was a surveillance' tendon, it was desirable to put the replacement tendon in at this time. Since one anchorage of.the tendon could not be considered Class I, a review of the structure was conducted to verify that the structural integrity of the containment would not be compromised by the assumed deletion of Tendon No. H-114. This review indicated that if the tendon were assumed to be ineffective there would _be essentially no adverse structural effect on containment. A letter outlining the findings of w this review is contained in Appendix B. In the process of replacement of the tendon, two minor non- ~ 'conformances were noted and documented. The total tendon elongation fell short of the specified minimum, 21-1/2 inches, 90% elongation. The actual measured 90% elongation was 20-15/16 inches. The tendon'was accepted with the measured elongation noted. Continuing surveillance lift-offs will verify the acceptability of the force in the tendon. Also, the first attempt to regrease the tendon was not completely successful. However, once the reactor.was in operation, a second attempt resulted in filling of the tendon as required. NCR No. S-292 was prepared documenting these problems and is included in Appendix B. 3. HORIZONTAL TENDON H-25 UNSEATING Some wedges in the anchor head on Tendon No. H-25 were inadver-tcatly _ unseated during detensioning. The unseating occurred at a very low tendon tension while the lift-off jack was being cycled. This unseating did not cause any damage; however, to avoid reseating the anchor head wedges on the same area of the strand, one set of anchor head shims was removed and the anchor head moved forward a distance equal to the shim thickness. NCR No. S-299, included in Appendix C, documents this problem. A modification was made to the lift-off jack to prevent this from recurring. This modification was tested on a sample tendon in a test bed _to assure the problem was corrected. The test procedure and data sheet are included in Appendix C. 4 REFERENCE BAR DISPLACEMENT 'The reference bar measurements on Tendons H-112, H-53, V-100 and i V- '< were found to be invalid due to accidental displacement of the bars.: Visual inspection of the joint between the bearing _ plate and concrete indicated that no movement had occurred. 5.: IDENTIFICATION OF CORROSION SURVEILLANCE STRANDS Corrosion surveillance t'endons were 'found to be installed without adequate identification on the 5 corrosion surveillance strands. It was found t hat once detensioned from one end, the corresponding 6.

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{ E r.{ . C.2 O f M a ad N 9 APPENDIIES 9 m f 4 K

O d APPENDIX A DOME AND VERTICAL SURVEILLANCE DOCUMENTATION 4 4.s

3 .1 .y s. t1suun SACRAMENTO MUNICIPAt UTitlTY DISTRICT O 1708 59th Street. Box 15830. Sacramento, California 95813;(916) 452 3211 May 23, 1975 Mr. Angelo Giambusso, Director Division of Reactor Licensing Of f!ce of Nuclear Reactor. Regulation U.S. Nuclear Regulatory Commission-Washington, D. C. 20555 Re: Docket No. 50-312 i Proposed Amendment No. 33 Rancho Seco Nuclear Generating Station, Unit No'. 1

Dear Mr. Giambusso:

in accordance with 10 CFR 50.59, the Sacramento Municipal Utility District hereby proposes to amend its Operating License DPR-54 for Rancho Seco Nuclear Generating Station, Unit No. 1, by submitting forty (40) copies of Proposed Amendme.nt No. 33. The Proposed Amendment No. 33 contains changes to the Rancho Seco Unic No. 1 Technical Specifications concerning the Surveilt v e Standards to determine the Structural Integrity of the Reactor Bullo-Please find attached a Technical Specification changc that modifies the present wording of Section 4.4.2 to agree with our actual capability as Indicated in Section 5.2.5.3 of the Rancho Seco FSAR. Section 4.4.2 of the Rancho Seco Technical Specification presently requires stressing to.8f's and detensioning three tendons in each of the three directional groups (dome, vertical, horizontal). The "as built" tendon end anchorage configurations will only allow stressing to.8f's and detension-Ing three horizontal tendons. The cause of the inconsistency between our capabil'ty in the area of tendon-surveillance as i dicated by the FSAR Section 5.2.5.3 and our pre-n sent Technical Specification commitment arises from an oversight on our part. Specifically upon receipt of the applicable AEC Regulatory Guide (1.35) we modified the Technical Specifications (Amene; ment 27) to agree as closely as possibic with the' guide. In.so doing we indicated that we could stress to .8f's and detension the three modified tendons in-each directional group. This was incorrect. Prior to issuance of the guide, detensioning was not considered -_to.be a' surveillance requirement but was used only as a tool to allow single strand removal. Since'only horizontal tendons must be detensioned to facil-Itate strand removal, th installation of.the anchor head shim stack essen-tial to detensioning we -limited to three horizontal surveillance t.endons. p -e,-

j, RANCHO SECO UNIT I 'J TECHNICAL SPECIFICATIONS. 1. Surveillance Standards 4.4.2 STRUCTURAL INTEGRITY Applicability Applies to.the structural integrity of the Reacto-Building. Objective i To define the inservice surveillance program for the Reactor Building. Specification 1 j 4.4.2.1 _ Tendon Surveillance AnlbspectionasdescribedbelowforIlft-offmeasurements, strand serveillance and anchorage survelliance shall be performed I, 2 and 3 years af ter the initial containme,t integrity test and every .5 years thereaf ter. 4.4.2.2 Lif t-Of f Measurements Lift-off measurements of the prestress forc'e shall be made on the following: A. Six dome tendons, 3 normal and 3 mcdified with one of each in each 60* group. B. Six vertical Landons, 3 normal and 3 modified. C. Six hoop tendons, 3 normal and 3 modified; modified hoop ten-i dons are provided with shim stack at.each anchorage to allow detensioning. ~ The lif t-of f readings shali not be Icss than the values predicted for the particular tiene the inspection is made.' These predicted values shall be based upon the final Jacking forces corrected for recorded seating losses and' calculated losses.due to concrete creep and shrinkage and pre-stressing steel relaxation. After the initial lift-off readings heve been taken on the modified hoop tendons they shallobe Jacked to e force of.8f's and then com-pletely detensioned to inspect.for broken or damaged strands. Strand continuity'w!!! be verified during retensioning by comparison of pre-dicted and observed clengations and-fcrces. All other surveillance tendons will be jacked only to observe and record. lift-off. ~ 4-21 2

"illJ j RANCHO SECO UNIT 1 TECHNICAL SPECIFICATIONS Surveillance Standards Specification (Continued) 8. 'The grease coverage will be noted along with the temperature to accumulate a record of grease variation versus temperature. 4.4.2 5 Reports A report covering the results of each inspection will be prepared, ~ reviewed by the District's Generation Engineering Department and filed with the plant quality assurance records. If any significant or critical deterioration is noted by this inspection, it will be-reported to the AEC as an abnormal occurrence. Should this be necessary, the initial report may be made within 10 days of the completion of the tests and the detailed report may follow within 90 days of the completion of the tests. 4.4.2.6 Liner Plate Surveillance The liner plate will be examined prior to the initial pressure test in accessible areas to determine the following: j A. Location of areas which have inward deformations. The magnitude of the inward deformations shall be measured and recorded. l l These areas shall be permanently marked for future reference and the inward deformations shall be measured between the angle stif ferers which are on 15-inch centers. The measurements shall be accurate to 0.01 inch. Temperature readings shall be obtained on both the liner plate and outside containment wall at the locations where inward de' formations occur. B. Locations of areas having strain concentrations by visual examination with emphasis on the condition of the liner surface. The location of these areas shall be recorded. 4.4.2.6.2 Shortly after the initial pressure test and approximately one year af ter initia1 ' start-up, a re-examination of the areas located in paragraph 4.4.2.6.1.A shall be made. Measurements of the inward 3 deformations and observations of any-strain concentrations shall 4 be made. 4.4.2.6.3 'If the dif ference in the measured inward deformations exceeds 0.25 inch' (for a. particular location) and/or changes in strain concen-tration exist, and investigation shall be made. The investigation will ' determine any necessary corrective action. 4.4'.2.6.4 The surveillance. program shall be discontinued after the one year initial. start-up Inspection if-corrective action was needed. If. corrective action is requirec, the frequency of'inspe,ction for a continued surveillance program shall'be determined. 4-23 .m-. y.y.9 y, -9 ,y9 ry. w v g

y -- ! 4 '..) ewe I APPENDIX B TENDON H-114 DOCUMENTATION 4 9 '

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1 BechtelPower Corporation r e Two Sacramento Municipal Utility District ..ttent on: Mr. D. G. Raasch i Containment Surveillance Tendon No. 114 May 12, 1975 at Therefore, it is acceptable with no adverse effect to operate with tendon No. 114 eliminated. If further information is desired, please contact us. Very truly yours, BECHTEL POWER CORPORATION M L. R. Brown INM/sp ~ -w d ~ .n

O u VSL CORPORATION '[ INTEROFFICE MEMORANDUM L TO: Rend Friedrich, President FROM: Merrill R. Wolstad, Manager, Engineering Structeres Division ~

SUBJECT:

Containment Structure Post-tensioning System Surveillance for Rancho Seco Nuclear Generating Station #1 i Socramento County, Californio On January 27,1975 VSL Corporation was awarded a contract for furnishing all labor and i equipment to perform surveillance of the VSL Tendons installed in the containment structure. The scope of work is described in invitation No. C12.05 by Socramento Municipal Utility District. On April 4,1975 horizontal tendon #114 was domoged during detensioning. The condition leading to this domoge, the findings and steps token by VSL Corporation to correct said domoge are outlined below. DESCRIPTION OF TENDON Tendon #114 is a corrosion surveillance tendon running from buttress #1 to # and was installed 3 with a stock of seven pairs of U-shaped shims between bearing plate and anchor head to allow detensioning and strand removal (refer VSL Dws. #11594-10). On April 4,1975 VSL Stressing Equipment was installed on both ends of subject tendon (refer Fig. # ) and lift-off was performer 1 in accordance with specifications. Subsequently, the tendon was stressed to.8 GUTS for the purpose of removing shims under rhe anchor head to allow detensioning. At this point it was discovered that, contrary to contract plans, the shims directly beneath the anchor head hoc guide bolts installed which were engaged in the adjacent shims. To allow removal of the first pair of shims, on elongation of 3/8" to 1/2" greater than anticipated by original contract drow-ings was required. After tho' first half-shim was removed, the rom was extended to its full trove and recycling was required. The previously removed half-shim was Installed, the rom retracted and the pulling head repositioned. With pulling wedges correctly seated, jock pressure was ~ opplied and the rom extended to permit removal of the shims. At a stress level of.819 GUTS, one-half shim.was removed. Shortly ofterwards, as the rom continued to extend in order to remove the other half-shim, several clicking sounds were heard, followed by a sharp pop. The stressing operation was. holted immediately, and in on ottempt to decrease the tendon stress, jocking pressure was reduced. The anchor head moved inward and was seated on the uneven stock of shims (refer VSL Dwg. #11594-11 and Fig. # ). In this position, several stronds were 2 placed in severe bending and subsequently failed. The tendon was left in this condition for three days and was then detensioned from buttress 1, removed and replaced.

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1 a .i HAiES ~ES~ NG JA 3D;7A~Oll:ES TESTING B INSPECTION SERVICES f~' LA90RATolut 3r OAKLAND RE PLY TO SAN JOSL $62 2773 - Anf A CODE dii ' MONTE R E Y _ t,46 6tECENF1 RCL k ROA1) .MN f RANCisCO OAALAND, Calif 0RNIA 94621 April 15, 1975 LAB NO: 44513 HTL NO: OD 859-1 ~

SUBJECT:

Tension Tests of Seven-Wire Stress-Relieved Strands for. Prestressed Concrete, ASTM: A416-74 j ~ REPORT TO: VSL Corporation l ~ P. O. Box 459 Los Gatos, CA 95030 Attention: Mr. Ed Davis i REPORT MATERIAL: Four (4) 1/2" dia. 270 kip, seven wire stress relieved strands were submitted to our laboratory on April 10, 1975. Two (2) strands, one (1) rusty and one (1) not rusty from C F & I Pack No. 8E4K6565L and two. (2) strands, one (1) rusty.and one (1) not rusty from C F & I Pack No. BE4K6564L. Sample' Area Yield Strength @ Breaking Elongation Identification Sq. Inches 1% Extension, Lb. Strength, Lb. in 24 in. % 6565L (Rusty) 0.1527 39340 42850 5.7 6565L (Not Rusty) 0.1524 39480 42900 5.5 '~6564L (Rusty ~ 0.1532 39280 42700 5.7 0.1524 38890 42850 5.7 6564L (Not Rusty) ~ The samples were tested in accordance with and meet the requirements of , ASTM: A416-74 for grade 270. Respectfully submitted, HALES TESTING LABORATORIES ik p1.,c %.,t S1<. J , MM u. 6.. - L.J.( H - t 14 Daniel Staab Laboratory Manager DS/lb ene ,e y v,

n

?!Y F s .as** APPENDIX C TENDON H-25 DOCUMENTATION 1 1 1 1 m l t 1 M h h w a p vv e n 7

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1

~. SACRAMENTO MUNICIPAL UTILITY DISTRICT id OFFICE MEMORANDUM

r:

To: File,(C12.05) DATE: April 29, 1975 ? .2 90 FROM: Ceor'ge Drew cu JECT ' Tes t Results for -Detensioning/Retensioning Procedure and Hardware Modifications, C12.05, Contract No. 5367, Test Results. The: attached letter and accompanying procedure directed the . tenden surveillance contractor (VSL) to conduct a test to verify the ability of a tendon lif t-off jack, modified by the addition of a pulling head chuck retainer plate including chuck contact springs, to repeatedly detension and retension a. tendon without unseating the pulling head. chucks. The intent of this memo is to present the re-sults of the test program. As shown by the completed data sheet attached to this memo, the test. verified that the modified-lif t-off jack can repeatedly cycle a tendon without unseating the pulling head chucks. This confirms. that .the Rancho Seco Tendon Surveillance Procedure can be accomplished through'.40 years of plant life without problems resulting from strand erosion. he test also demonstrated that the tendon lif t-off jack can successfully stress a tendon to.85f's from behind the anchor head without strand failure or anchor head wedge unseating, his confirms that the strand f ailure encountered during lif t-off testing of Tendon H-114 was related to a jack / anchor head interference as concluded by i NCR S-283 Revision 1. Finally the test confirmed and quantified the residual seating force which holds-the strand-in' the anchor head / wedge assembly af ter j all strand tension is released. GD:dm' c'c: Dal Raasch/ John"Hiltz a 4 - - +

Ds n LIFT-OFF/DETENSIONING JACK' PROGRAM i . \\ 1.0 PURPOSE- .1 Develop hardware ~ar.d procedure to detension and retension horizontal 1 surveillance tendons without unseating and reseating pulling head chucks after each jack stroke. .2 Verify capability of anchorage system to accept a load equivalent to.85f's from lift-off jack without strand failure at anchor head.

2.0 REFERENCES

,.1 NRC. Regulatory Guide -No.1.35. .2 ' VSL Corporation Drawing No. M8. '.3-Specification No. C12.05. 3.0 LIMITS AND PRECAUTIONS .11 Prior to operating jack, verify pulling head chucks are uniformly , seated by tapping chucks. .2 When lift-off jack is pressurized, personnel shall b'e restricted from back of jack. 4.0 TEST PROCEDURE A 35 foot long steel test bed shall be set up with a V'SL tendon with anchor head configuration similar to that shown in Reference No. 2. Fifty-two strands of low relaxation,270 ksi strand are to be installed. Shim pairs to be as follows: three (3) each, one-half (1/2) inch; one (1) each, two (2)' inch. Tendon shall-be stressed with calibrated lift-off jack. Tendon to be stressed to.8f's with seating loss calculated to anchor tendon at.7f's, seating loss approx'mately.405 inches. -.l' Ninety percent (90%) elongation to be measured and recorded. .2 - l Seating loss to be measured and recorded. Jack shim arrangement to be set up to allow shim removal. Remove shims, detension, retension and replace shims repeatedly, check pulling head chucks to verify chucks remain seated. Check anchor head wedges.to verify - -w + c-

Q T LIFT-OFF/DETENSIONING JACK TEST PROCRAM Data Sheet Anchor heads, describe condition: 5 2 $ 7 r u el A J o,.c 4 r, ne-e/s,me.w

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f. % eAo seen A:~-er:t 3 se/ - el. /r ter) -% 4 7, GesA //s/e. Ats/ lo *10 M /!T M 4 Y Strand, describe condition: ASTM 4M M feetea I. /h Cerrar tn u/eA n (A rs s.,s., w s-f., +. s.,4 sea rs n< car a so/ni-oa.es r:/~,j

~ Jack, record number on jack & pressure gauges: v e, c. h 3 70fd Govya 2B Ce/;}rd.vs e f/'be Aru/ I Record lift-off prior to stressing /05o PS/.= 7/ 7' N, o.r Mr ~ Record pressure to stress tendon to.8~'s: 770o ~ / 7/ 7 N/My PF y Record % percent elongation A /3 , Seating loss /s , Lif t-off 7 000.*.T/* /r4 0 a T o Cycles completed (one cycle includes detensioning & recensioning): 1 n!2 /3 /4 [5 /6 /7 ! [9 10 ! 11 / 12 / 13 / 14 / 15 M 8 Stress tendon to.85f's, comments: 8/9s*Ps /, tono sterprco wirmrer wrar ejesegrM6 Detension, remove jack, record condition of strand at jack chuck marks ON. e>-4 /.rd '$ Single strand jack no. SNC'3fLoad cell no. 700 2. Strain ind. no. oo 10s~5 t /6. or: j CeI;b. A1%e4W Unseat 10 strands from anchor head, record unseating force (KIPS): 1. DI 2._ f', 33 3. f,70 4. 3.78 5. .i. d' S "'* * .m A ~

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7. 9. S*2 8.

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9. 4.*30
10. % C2 4

Aay :O Record strand condition at wedge marks: S f,.. c/,,<,r/r,,/ w f /r enr Sc f ( Aw k m, <' /r,. Ab S / :s op e.. o 9-fror /' t Photograph: general arrangement, anchorage co'nfiguration, jacking operation, strand condition at chuck marks, strand condition at wedge marks. WORor. Accot,n tsnEO 4-z r.71 4 12 4 7f~ /w

.,.l. 2 ~. av j APPENDIX D 1 JACK CALIBRATION BRCORDS 90 m -e e

y+ F g. CALIBRATION READINGS FOR 908' TON RAM CALIBRATED ~IN 4000 KIP UNIVERSAL TESTING MACHINE b UNIVERSITY OF CALIFORNIA, BERKELEY. MARCH 13,1975 INDICATED RUN # 1 ,RUN #'2 RUN # 3 i GAGE SMUD 2# INDICATED INDICATED INDICATED l GAGE SMUD ' LOAD' GAGE SMUD LOAD GAGE SMUD LOAD PRESSURE. 2B-PRESSURE KIP. 2B-PRESSURE KIP 28-PRESSURE KIP F PSI PSI PSI PSI 0 0 0 0 0 0 0 1000-1000 21 0 975 200 950 200 U 2000-1950 450 1950 450 1950 425 3000 2950 700 2950 650 2950 650 4000 3950 850 3950 875 3950 870 l 5000 4950 1100 4950 .1100 4925 1100 6000 5950 1350 5900 1320 5900 1320 7000 -6950 1555-6925 1550 6950 1550 8000 7950 1775 '7950 1775 7925 1775 Ram extended 1" at start of calibration .i 's PTD 908.6 3 1/4 - 37040 908.6.U.S.-TONS AT-8005 PSI EFF. AREA 227 SQ. IN. VOL/STR0KE 737 CU. IN. 375' F313 e O +

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la CALIBRATION RFADINGS'FOR 908 TON RAM ~ i CALI'BRATED IN 4000 KIP. UNIVERSAL TESTING MACHINE l UNIVERSITY OF CALIFORNIA, BERKELEY 1 4MRGP995=99P!r M AN (og l97 6 INDICATED RUN i 1 RUN ' 2 RUN f 3 GAGE SMUD INDICATED INDICATED INDICATED GAGE SMUD LOAD GAGE SMUD LOAD GAGE SMUD LOAD 1A PRESSURE IB PRESSURE KIP IB PRESSURE KIP 1B PRESSURE KIP PSI psi pq' _ PSI O O 0 0 0 6 0 t icio 2.% tizo z4(, uAo 2.45 1000 . M00 -et0-M00-tie-4000- -2+0-N<t\\ b60 ~2200 472.

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2000 2000-490-30M 430-32.'2.o 7o2. SL Ebo (o45 3 t to o G O 3000 -3000 -650-0000-4M-4000-4 2.2.sco CL SO 4 tto o c)2.0 4850 945 4000 0995 -0M- -39M. -800-s975-S. 5 - SZbo \\lSO E140 114 7 i S t 2_, o t ic. O 5000 4959-409fr 4950-4095 -e95tr te95-GISc2 t 5% eo 1%F 6 pa,o t%o 6000 -5925 -MM MM -5900-4GM- ~ 7too 1585 7t oo t sc15 7 00 is6o 7000 4 900 -M40-6900-M30 - 1000-M45 - 8000 N N N M N JW 6 500 s C&O 19157-tsso \\ %.o 6 E60 1St5 RAM EXTENDED t:2" AT START OF LALIBRAllVN st PTD 908.6 - 3 1/4-908.6 TONS AT 8005 PSI EFF. AREA 226.8 SQ. IN. C 409872 e R e.c..I. % s. ; e a. m o f t., 44 ds sevs .p.w. t W uso7 u ^ r -r--t g rw w-v----- ,,es+w y wy-+wrg-- qg-p in wis ty w$ g ,*e qw e evww -g wpr - w ww9**p---m-- ywrt-

R O. L.; 1 AFPENDIX E

SUMMARY

OF LOSSES FOR CALCULATED LIFI-OFF I -1 4 i ~ i -}}

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