ML17303A454

Unit 1 Steam Generator Eddy Current Exam,Feb 1987, NDE Summary Rept

ML17303A454
Person / Time
Site:	Palo Verde
Issue date:	06/04/1987
From:	Mary Anderson, Hauser D, Stickler J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:
Shared Package
ML17303A453	List: ML17303A452 ML17303A454
References
NUDOCS 8707100215
Download: ML17303A454 (34)

Text

Arizona Nuclear Power Project HQK SLIImmevy Repel t UNIT 1 STEAM GENERATOR EDDY CURRENT EXAMINATION FEBRUARY 1987 8707g002i5 pDR ADQCK 0500@DR SL.

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PALO VERDE NUCLEAR GENERATING STATION UNIT 1 STEAM GENERATOR EDDY CURRENT EXAMINATION FEBRUARY 1987 ARIZONA NUCLEAR POWER PROJECT P. 0. BOX 52034 PHOENIX, AZ 85072 PREPARED BY: DATE: 4' REVIEWED BY: DATE: CP I'ATE:

APPROVED BY: I REPORT DATE: 6/04/87

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INDEX 1.0 Summary 2.0 Examination Results 3.0 Examination Techniques and Equipment APPENDIX A Summary Data Sheets APPENDIX B Tubesheet Maps APPENDIX C Form NIS-1

lt UNIT 1 STFAM GENERATOR EDDY CURRENT EXAMINATION 1.0

SUMMARY

On January 17, 1987 a tube leak was observed in steam generator ll (Unit 1, steam generator 1). Unit 1 was subsequently shutdown on January 18, 1987 and work began towards opening the steam generators for eddy current examination. Following removal of the manway covers, the leak was visual-ly identified as being in the low numbered row/low numbered column corner of the tube bundle on the cold leg side. A full Technical Specification examination was performed with an initial sample of approximately 2800 tubes in each steam generator, with all examinations performed from the cold leg. All tubes were examined full length with the exception of row 1 and some row 2 tubes which were examined to the first support on the hot leg side when possible.

The initial examination results fell into category C-2 in both steam generators and an additional 716 tubes were examined in steam generator 11 and 696 tubes were examined in steam generator 12. The tubes in the expansion program were examined to the fourth support on the cold leg.

The results of the supplementory testing fell into category C-l.

2.0 EXAMINATION RESULTS The examination results revealed wear indications at the lower eggcrates on the cold leg side of both steam generators in the low row corners of the tube bundles. A total of fourteen degraded tubes and seven defec-tive tubes were identified in steam generator ll, and thirteen degraded tubes and six defective tubes were identified in steam generator 12 (Unit 1, steam generator 2). The summary data sheets in Appendix A list all tubes in both steam generators with thru-wall indications from 0-100K and distorted tube support signals with probable indications (DSI).

Several tubes were identified in each steam generator as having minor dings and dents. The majority of these had been identified during base-line examinations, however, the following tubes in steam generator ll showed significant denting at the feedwater flow distribution baffle that was not present during the baseline examination: Row 1 column 50, row 1 column 52, row 1 column 54, rowl column 56, row 1 column 60, row 1 column 62, and row 1 column 64. In addition, row 1 column 58 was dented to the point of 0.540" probe would not pass.

Steam generator 11 had sixteen tubes in the examination sample that were not explanded into the tubesheet while steam generator 12 had fourteen tubes with no tubesheet explansion.

Possible loose part indications were observed in both steam generators with steam generator 11 having five tubes and steam generator'12 having one tube. Sludge profiling was also performed during the examination and was found to be very minor. Less than 100 tubes in each steam genera-tor showed any indication of sludge with average depth less than an inch and maximum depth 1.5 inches.

Page 1 of 2

The examination resulted in plugging an additional 20 tubes in steam generator ll, and 14 tubes in steam generator 12. The tube sheet maps in Appendix B show the total tubes plugged in each steam generator to date and the examination extent during this outage. The NIS-1 form in Appendix C lists each of the tubes, by row and column, plugged as a result of this examination. The following Engineering Evaluation Requests (EER) were initiated to track the examination results: 87-RC-035, 87-RC-037, 87-RC-038 and 87-RC-039. In addition,' report on the steam generators, including root cause analysis, was transmitted to NRR by letter ANPP-40179-JGH/BJA/98.05.

3.0 EXAMINATION TECHNIQUES AND EQUIPKBlT The eddy current examination was performed by Conam Inspection using Zetec MIZ-18 digital data aquisition and analysis systems. The following test frequencies were used during the examination:

550 kHz differential and absolute 300 kHz differential and absolute 100 kHz differential and absolute 20 kHz differential and absolute The majority of the tubes in the examination sample were tested with Zetec manufactured 0.610" and 0.600" SFM/HF probes. The tubes in rows 1, 2, and 3 were examined with either 0.590" or 0.540" SFM/HF probes.

A Zetec SM-4 remote fixture was used for probe positioning and tubesheet templates were installed for tube location verification.

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f APPENDIX A Summary Data Sheets

'l ROW: Indicates the row number of a given tube.

LIN: Indicates the column number of a given tube.

LEG: Indicates the tube leg from which examination was performed; either the hot (H) leg or cold (C) leg.

EXTENT REQ: Indicates the tube length required to be examined, i.e.,

F/L full length, 07H-seventh support on hot leg side.

EXTENT TST: Indicates the tube length actually examined.

REM: Remarks column used for comments relating to examination.

REEL: Indicates reel number data was recorded on.

PROBE: Indicates probe diameter and style used for examination.

LOCATION: Gives indication location relative to known landmarks such as supports and batwings.

VOLTS: Indicates the peak-to-peak voltage of a given indication response.

DEG: The measured phase angle of a given indication response.

Fo ~ The percent through the tube wall of a given indication based on the measured phase angle and the calibration curve established for that particular channel.

CH: Indicates the channel used to measure and evaluate a given indication.

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CUMULATIVE REPORT 81/87, ARiZONA PUBLiC SERVICE CO, PALO VFRD:", UNIT 1 STEAN GEi4ERATOR: 1 PAGE: 1 OF 2 LOCATION: ALL DATE: 92/87/87 CRiTERIA: 8/ TO 199'A, DSI TiiNE: 98: 89: 14 I I t I IEXTFi4T I I I I I CURREi4T I IROMILINIHEATOILEGIREQITSTIRENIREELIPROBEI LOCATION IVOLTSliNILIDEGI '/ ICHI I I I I I I I I I I I I I I I I 21 11 187HI87CIRiTI 991 1618SN I 83C- Q. 8 8. 61 11531 <28 I Yi31 I

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s 81/87, I CUNULATIVE RFPORT ARIZONA PUBLIC SERVICE CO, PALO VERDE., UNIT 1 STEAN GENERATOR: 1 PAGE: 20F 2 I OCATIOV,: ALL DATE: 82/87/87 CRiTERIA: 8% TO 188/, DSI TINE: QB:89:14 I I I I IEXTENT I I I I I CURREilT I I RGWILIHIHEATIIILEGIREGIITSTIREiNIREFLIPROBEI LOCATION IVOLTSINILIDEGI  % ICHI I I I I I I I I

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MO TREiilD ANALYSiS REQUESTED Page A3 of CONAN

CUNULATIVE REPORT Gl/87~ ARIZONA PUBLIC SERVICE CO, PALO VERDE, UNIT 1 STEAN GENERATOR: 2 PAGE: 1 OF 2 LOCATION: ALL DATE: 82/GB/87 CRITERIA: 8/ 70 188/, DSI TINE: 89:15:41 I I I I IEXTENT I I I I I CURRENT I I ROW I L IN I HEATS i LEG I REQ I TST I REN I REEL I PROBE I LOCATION IVOLTSINILIDEGI 8 ICHI I I I I I I I I I I I I I I I I

31 21 187H I F/L I I 8381688SNI82C- 8.2 I l. 21 11581 <281>%31 I

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CUiviULATiVE REPORT 81/87, ARiZONA PUBI IC SERViCE CO, PALO VERDE, UNiT 1 STEAN GENERATOR: 2 PAGE: 2 OF 2 LOCATION: ALL DATE: 82/88/87 CRiTERiA: 8% TO 188%, DSi TINE: 89: 15: 41 I I I I IEXTENT I I I I I CURRENT I I ROW I L iiM I HEATS I LEG I REQ I TST I REiN I REEL I PROBE I LOCATION I VOLTS liNiLIDES I / I CHI I I I I I I I I I I I I I I I I I 4 I 189 I I C I87HI87CIRPII 882I618SNI82C+ 8.8 I 11. 2 I I 186 l 59IN3I I I I I C I87HI87CIRITI 882I618SNI82C+ 8.8 I 11. 4 I I 951 64IN3I I I I I C I87HIF/LIP?DI 812 I 618SN I 82C- 8. 6 I 14.8l l1281 53IN3I I 6 I 1891 I C IF/LIF/LI I 882 I 618SN I 82C+ 8. 9 I 1.9l I 125 I 33 I N3 I I I I I C IF/LIF/LIRPII 8121618Sivl I 82C+ 8. 9 I 9m3I l127I 47IN3I I I I I C IF/LIF/LIRPil 882I618SNI82C+ 8.8 I 6.4I ~ l114l 53IN3I I I I I C IF/LIF/LI I 882I618SNI82C+ 8.8 I 6.4I l181I 58IN3I I I I I I I I I I I I I I I I I NUNBER OF TUBES SEL CTED FRON CURRENT OUTAGF: 23 NO TREND ANALYSiS REQUESTED Page A5 of 5 CONAN

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APPENDIX B Tubesheet Maps

]I Oi/87, ARIZONA PUBLIC SERVICE CO, PALO VERDE, UNIT i STEAM GENERATOR: 2 PROC: 73TI-9RC01 REV 0 DATE: 03/05/87 TIME: 09: 37 LOCATION: ALL STAY CRITERIA: PLG PLG 40 EVALUATED FIXTURE TEMPLATF 160 160 150 150 140 140

'rl fD pg 130 130 1~0 120 110 110 100 100 90 90 60 70 80 70

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60 60 50 aO ~0 30 30 20 10 10 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 CONAM

( I Oi/87, ARIZONA PUBLIC SERVICE CO, PALO VERDE, UNIT i STEAH GENERATOR: 1 PROC: 73TI-9RCOi REV 0 DATE: 03/04/87 TINE: 13: 04 LOCATION: ALL STAY CRITERIA: PLG PLG 28 EVALUATEO FIXTORE TEHPLATE 160 160 150 150 140 140 130 130 120 120 110 110 100 .---.- 100 90 90 eo 70 80 70

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60 50 50 40 40 30 30 20 20 10 10 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 CONAH

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APPENDIX C Form NIS-1

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FORM NIS-1 OWNERS'ATA REPORT FOR INSERVICE INSPECTIONS OWNFR ARIZONA PUBLIC SERVICE, et al ADDRESS P. 0. BOX 52034, PHOENIX, AZ 85072

2. PLANT PALO VERDE NUCLEAR GENERATING STATION ADDRESS 4 MILES SOUTH, WINTERSBURG, ARIZONA

3. UNIT NO. 1 4. OWNERS CERTIFICATE OF AUTHORIZATION N/A

5. COMMERCIAL SERVICE DATE 1/28/86

.6. COMPONENTS INSPECTED:

COMPONENT OF MANUFACTURER SERIAL STATE OR NATIONAL APPURTENANCE OR INSTALLER NUMBER PROVINCE BOARD NO

,IMRCEEOlA Steam Generator ll Combustion Engineering 78273-1 .. NA 22499 Tubing 1MRCEE01B Steam Generator 12 Combustion Engineering 78273-2 '..NA 22500 Tubing PAGE 1 OF 2

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c FORM NIS-1 (BACK)

7. EXAM DATES 1/27/87702/6/87 8. INSP INTERVAL PROM1/28/86T01/27/96

9. ABSTRACT OF EXAMINATION. INCLUDE A LIST OF EXANINATIONS AND A STATEiHENT COAVCERNIAVG STATUS OF WORK REQUIRED FOR CURRENT INTERVAL.

A total of,3,590 tubes were examined in Steam Generator ll and a total of 3,426 tubes were examined in Steam Generator 12.

10. ABSTRACT OF CONDITIONS NOTED.'

Steam Generator ll: 'ourteen degraded tubes and seven defective tubes. Eight tubes showed significant denting that were not present on the baseline data. Sixteen tubes were not explanded into the tube sheet. Five tubes had indications of possible loose parts.

Steam Generator 12: Thirteen degraded tubes and six defective tubes were identified. Fourteen tubes were not explanded into the tubesheet and one tube had indications of a possible loose part.

ll. ABSTRACT OF CORRECTIVE HEASURES.

The following tubes were plugged as a result of this examination:

S/G 11 S/G 12 ROW COL ROW COL ROM COL ROW COL ROW COL 2 1 39 86 1 52 3 , 2 2 187 4 1 1 170 '1 54 147 60 1 188 1 2 4 187 1 56 128 81 2 189 3 2 1 188 1 58 26 113 4 189 2 3 5 188 1 60 150 127 6 189 1 4 2 189 2 183 3 4 4 189 2 185 1 50 4 185 1 .186 WE CERTIFY THAT THE STATEHEViTS HADE IAV THIS REPORT ARE CORPXCT AND THE EXAMINATIONS AVLD CORRECTIVE iiIEARSUES TAKEN CONFORM TO THE RULES OF THE ASHE CODE, SECTION XI.

DATE SIGVAED ARIZONA PUBLIC SERVICE CO CERTIFICATE OF IiVSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of AZ employed by Kem er Grou of Long Grove IL have inspected the components described in this OWiNERS REPORT during the period 1/87 to 2/87 , and state that to the best of my knowledge and belief, the Owner has performed examinations and taken corrective measures described in this OWViERS REPORT in accordance with the requirements of the ASHE Code,Section XI. By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this OWVLERS REPORT.

Furthermore; neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arisi from or co n ed with this inspection.

IViSPECTOR Viat'1 Board, State, Province DATE~

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