IR 05000528/1990010
| ML17305A884 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 04/06/1990 |
| From: | Harris R, Kerch H, Strosnider J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML17305A883 | List: |
| References | |
| 50-528-90-10, 50-529-90-10, 50-530-90-10, NUDOCS 9006200315 | |
| Download: ML17305A884 (21) | |
Text
e U. S.
NUCLEAR REGULATORY COMMISSION REGION Q Report No.
90-10 Docket Nos.
50-528 50-529 50-530 License Nos.
NPF-41 NPF-51 NPF-74 Licensee:
Arizona Public Service Co.
P.O.
Box 21666 Phoenix Arizona 85036 facility Name:
Palo Verde Units
2 and
Inspection At:
Wintersbur Arizona Inspection Conducted:
March 5 thru 16 1990 Inspectors:
e W. Kerch, Project Manager, NDE
/
. Harris, NDE Technician date W//pro date Approved by:
R. Strosnider, Chief, Materials, and rocesses Section, EB, DRS, Region I ate Ins ection Summar and Conclusions:
On March 5 through 16, 1990, an announced NRC independent measurements inspection was conducted at Palo Verde Unit 2 using the NRC Mobile Nondestructive Examination (NDE) Laboratory.
The inspection focused on inservice inspection related activities.
The erosion-corrosion and pipe support inspection programs also were inspected.
Implementation of the ISI program was good.
One violation was identified regarding failure to mark the centerline of welds inspected by ultrasonic testing as required by Section XI of the ASME Code.
The licensee took appropriate actions to correct this condition and demonstrated a positive attitude toward maintaining a high quality ISI program.
'0 9006200~12<
Detail s 1,0 Persons Contacted 30703 Arizona Public Service APS
" R.
D
" W.
T.
S.
R.
S.
S.
T.
R.
R.
S.
R.
Rouse, Compliance Engineer B. Hansen, Materials Engineer E. Webster, Supervisor Engineering H. Cogburn, Director Standards Terrigino, Management Service Supervisor Henry, Site Representative Johnson, Site Representative Gross, Engineer R. Brandish, Compliance Manager Badsgard, Nuclear Engineer Supervisor Fuller, Manager Quality Assurance Szuch, Quality Assurance Auditor Fountain, Deficiency Coordinator U.S. Nuclear Re viator Commission t
J.
F. Ringwald Resident Inspector RV
" Denotes those attending entrance and exit meeting.
The above listed personnel were present at the exit meeting.
The inspector also contacted other administrative and technical personnel during the inspection.
2.0 Inde endent Measurements NRC Nondestructiv'e Examination and ualit Records Review of Safet Related S stems During the period of March 5 through March 16, 1990, an onsite independent measurements inspection was conducted at Palo Verde Nuclear Power Station.
The inspection was conducted by regional based inspectors.
The objectives of this inspection were to assess the adequacy of the licensee's Inservice Inspection program, Welding Quality Control program, and the actions regarding the "As-Built" configuration of pipe hanger/supports.
This was accomplished by repeating examinations required of the licensee by regulations and codes and comparing the inspection results.
2. 1 Visual Examination 5~7050 Four (4) safety related Feedwater (FW) System pipe weldments and the adjacent base material (1 inch on either side of the weld) were visually examined in accordance with NRC procedure NDE-10, Rev.
1, Appendix A, and the associated licensee procedure for visual examination of pipe systems and attached components, QC documents, isometrics and as-built drawings.
Examinations were performed
specifically to identify any cracks or linear indications, gouges, leakage, arc stri kes with craters, or corrosion, which may infringe upon the minimum pipe wall thickness.
Mirrors, flash lights and weld gauges were used to aid in the inspection and evaluation of the weldments.
Specific weldments examined are as follows:
DWG/ISO LINE WELD ID COMPONENT e
UNIT 2 ZONE 56 SG-2020-DLBB"24
.
PIPE TO PIPE UNIT 2 ZONE 56 SG-2020-DLBB-24 PIPE TO VALVE UNIT 2 ZONE 56 SG-2020-DLBB"24
PIPE TO VALVE UNIT 2 ZONE 56 SG-2020-DLBB-24
'
PIPE TO VALVE Results:
The welding and overall workmanship inspected was satisfactory.
No violations were identified.
2.2 Visual Ins ection of Pi e
Han ers and Su orts 57050 During this inspection sixty-five (65) safety related hanger/supports were visually inspected.
The inspectors used NRC procedure NDE-10, Rev.
1, Appendix A and B
in conjunction with licensee procedures entitled Visual Examination of Support Components (73TI-9ZZ18 Rev.
3) and Visual Examination of Welds and Bolting (73TI-9ZZ17 Rev. 2),
gC documents and associated isometric drawings.
Included in this inspection were ASME Class 3 hanger/supports selected from the Auxiliary Feedwater (AF) System.
In the area of welds, the accessible surface area and adjacent base metal for a distance of one-half inch on either side of the weld were examined.
In the area of component integrity, specific attributes looked for were proper installation, configuration or modification of supports, evidence of mechanical or structural damage, corrosion, and bent, missing or broken members.
Attachment ¹1 is a list of specific hanger/supports inspected.
Results:
Welding and overall workmanship were acceptable.
No violations were identified.
2.3 Ma netic Particle Examination 73753 The NRC inspector witnessed magnetic particle examinations performed by two, ASNT Certified, NDE site inspectors, of four (4) safety related pipe weldments and adjacent base material (2 inches on either side of the weld).
The examinations were performed in accordance with the licensee's procedure entitled,
"Dry Magnetic Particle Examination", 73TI-9ZZ05, Rev. 2.
The direct contact method (Yoke),
with dry powder was the inspection medium.
Included in this examination were ASME Class 2 pipe weldments selected from the Feedwater System.
DWG/ISO LINE WELD ID COMPONENT UNIT 2 ZONE 56 SG-2020-DLBB"24 UNIT 2 ZONE 56 SG"2020-DLBB"24 UNIT 2 ZONE 56 SG-2020-DLBB"24 UNIT 2 ZONE 56 SG-2020-DLBB-24 PIPE TO PIPE PIPE TO VALVE PIPE TO VALVE VALVE TO PIPE
Results:
No violations were identified.
2.4 Radio ra hic Examination/Review Unit
57090 One set of radiographic film, shot by the licensee's radiographers, was reviewed by the NRC inspector.
The aforementioned radiographs were of a four-inch butt weld between a cap and the nozzle of a blowdown line.
Radiography was performed and evaluated in accordance with the licensee's radiographic procedure 73TI-OZZ13, Rev.
1, on component ID 1PSGEL180 Upper Blowdown Nozzle-4".
Results:
No violations were identified.
2.5 Ultrasonic Examination 57080 Four (4) safety related pipe weldments were ultrasonically examined by the NRC using a Krautkramer USL-48 ultrasonic flaw detector in accordance with NRC procedure NDE-1 Rev.
0, Arizona Public Service (APS) procedure 73TI-9ZZ09, Rev.
3, and associated ultrasonic test data.
Instrument calibration (linear verification)
was performed using NRC procedure NDE-2, Rev. 0.
A distance-amplitude correction curve (DAC) was constructed using the licensee's calibration standards numbers 76 and 78.
Specific weldments examined are as follows:
DWG/ISO UNIT 2 ZONE 56 UNIT 2 ZONE 56 UNIT 2 ZONE 56 UNIT 2 ZONE 56 LINE SG-2020"DLBB-24 SG-2020-DLBB-24 SG-2020"DLBB-24 SG-2020"DLBB-24 WELD ID COMPONENT PIPE TO PIPE PIPE TO VALVE PIPE TO VALVE VALVE TO PIPE Results:
No violations were identified.
The inspector noted that the licensee had identified during fabrication that the counterbore area of one of the welds was under minimum required wall thickness and that the area had been properly restored to the required thickness by weld build-up.
2.6 Erosion/Corrosion 57080 Two pipe components (tee's)
were examined for erosion/corrosion using a Nova D-100 digital thickness gauge.
The method and procedures used were in accordance with NRC procedure NDE-ll, Rev. 0, the licensee's procedure entitled, "Erosion/
Corrosion Monitoring-73TI-OEE02", Rev.
1 and associated quality assurance records.
The erosion/corrosion examination was performed on selected pipe components to determine if wall thinning was present.
The thickness measurements were taken at predetermined locations on the systems selected and were on a 2 or 3 inch square grid depending on the size of the component.
Results:
The results of this examination revealed several areas that appeared to be below minimum wall thickness for this material according to the licensee's procedure and the pipe wall schedule for this material listed in ANSI/ASME B36.20.
The wall thickness measurements taken by the NRC inspectors were compared to those taken by the licensee's inspector to verify that areas existed which may be below minimum wall thickness.
Because of the instrument used.in taking
't I
measurements (the NRC used a digital thickness gauge), it could not be verified at the time of the inspection if there was a reduction in wall thickness below the code specified minimum.
The components examined were from balance of plant (BOP) and not safety related, therefore this is not a violation.
The licensee believes that laminar discontinuities may be interfering with the actual readings taken.
The licensee is having the fitting examined from the inside surface to determine if any corrosion/erosion has occurred and to determine if any of the minimum wall readings are due to laminations interfering with the examination and will give results to the resident NRC inspector.
2.7 Steam Generator Blowdown Sam le Line 92706 During this inspection the NRC NDE team inspected the repair welding of the Steam Generator Blowdown Sample line for Unit 1.
The welding and physical rework were performed in a professional manner, data packages were complete and ASME Code requirements were satisfied'.
No violations were identified.
2.8 Inservice Ins ection ISI Pro ram 73753 The 1988 ISI outage data was reviewed during this inspection.
The inspector reviewed the following to ascertain compliance with applicable ASME code requirements, licensee commitments and regulatory requirements.
1988 Outage ISI Report Inspection reports 88-2001 thou 88-2228 Inspection calibration reports ISI relief requests NDE personnel qualifications Based on the foregoing, the licensee's ISI program is intended to meet the requirements of the ASME Boiler and Pressure Vessel Code,Section XI, 1980 Edition through winter 1981 addenda.
The licensee has modified the ISI 'programs at all three Palo Verde plants in order to use the same code'nd addenda.
The inspector determined that Palo Verde's Materials Engineering Group has the prime responsi-
~ bility for coordinating and conducting the ISI Program, including developing inspection'chedules, preparing procedures and providing qualified inspection personnel.
The inspector concluded that Palo Verde's ISI Program was adequately staffed by site and contractor personnel to properly execute the program.
ASME Section XI, Article IWA-2600 and mandatory Appendix III, Supplement 2,
require that a marking system be established to provide a reference to the centerline of welds requiring volumetric examination.
The inspector found that the licensee has not been marking welds included in the ISI program in accordance with this requirement.
The following ISI welds were not centerline marked, line SG-2020-DLBB-24 welds 1, 4, 6 and '
e This item is in violation of 10CFR 50.55a that requires inspections be performed in accordance with the applicable sections of Section XI of the ASME Code (50-528, 529 and 530/90-10-01).
The licensee took appropriate actions before the conclusion of the inspection to assure that proper marking will be provided in the future.
The licensee wrote letter file 890-008-10 that provided the commitment to reviewing current ISI procedures and to start stamping the requirements of ASME Section XI during this outage.
Based on review of the licensee's corrective actions, no response to this notice of violation is required.
3.0 Review of Site NDE Procedures and Manuals The following procedures were reviewed in the regional office for compliance to the licensee's FSAR commitments and applicable codes, standards and specification:
Arizona Public Service APS Inservice Ins ection Nondestructive Examination Procedures Procedure title Number/Revision Visual Examination of Support Components Visual Examination of Welds and Bolting Liquid Penetrant Examination Ultrasonic Thickness Measurements Erosion/Corrosion Monitoring Ultrasonic Examination of Pipe Welds Results:
No violations were identified.
73TI-9ZZ18 Rev.
73TI-9ZZ17 Rev.
73TI-9ZZ07 Rev.
73TI-OZZ02 Rev.
73TI-OEE02 Rev.
73TI-9ZZ09 Rev.
4.0 Attachments:
Attachment No.
1 is a tabulation of specific hanger/support components examined and the examination results.
Attachment No.
2 is a tabulation of specific areas inspected for erosion/corrosion and the thickness measurements.
5.0
~Mana ament Meettn s
30703 Licensee's management was informed of the scope and purpose of the inspection at the entrance interview on March 5, 1990.
The findings of the inspection were discussed with the licensee's representatives during the course of the inspection and presented to licensee's management at the exit interview (see paragraph 1.0 for attendees).
At no time during the inspection was written material provided to the licensee by the inspector.
The licensee did not indicate that proprietary information was involved within the scope of this inspectio ATTACHMENT 41 SITE:
PALO VERDE
INDEPENDENT MEASUREMENTS INSPECTION SHT
OF '8 HANGER/SUPPORT DATE 3/05-3/16/90 WG/ISO AFF-13 1 AFF-131 AFF-131 AFF-131 AFF-131 AFF-131 AFF-131 AFF-13 1 AFF-131 AFF-131 AFF-131 AFF-13 1 F-131 AFF-13 1 AFF-131 AFF-131 AFF-131 AFF-131 AFF-131 AFF-131 AFF-13 1 AFF-131 AFF-131 AFF-131 AFF-13 1 FF-131 F-131 AFF,-131 HANGER/SUPPORT 13AF 045H002 13AF 045H003 13AF 045H004 13AF 045H001 13AF 026H003 13AF 026H004
'3AF 003H002 13AF 003H001 13AF 009H001 13AF 009H020 13CT 022H001 13AF 015H003 13AF 015H001 13AF 015HOOA 13AF 025H002 13AF 003H007 13AF 064HOOA 13AF 064HOOB 13AF 064HOOC 13AF 064HOOK 13AF 013H019 13AF 013H018E 13AF 013H018W 13AF 030H003 13AF 030H002 13AF 030H004 13AF 030H001 13AF 031H001 SYS AF CL CAT ACC REJ X
COMB%NTS
ATTACHMENT 01 INDEPENDENT MEASUREMENTS INSPECTION SHT 2 OF 9 SITE:
PALO VERDE
HANGER/SUPPORT DATE 3/05-3/16/90 WG/ISO AFF-132 AFF-132 AFF-132 AFF-132 AFF-132 AFF-132 AFF-132 AFF-132 AFF-132 AFF-132 AFF-132 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 AFF-133 F-133 F-133 AFF-133 HANGER/SUPPORT 13SG 082H003 13AF 082H005 13AF 017H002 13AF 017H003 13AF 017H004 13AF 005H003 13AF 005H004 13AF 005H005 13AF 005H006 13AF 005H007 13CT 005H008 13AF 003H008 13AF 003H003 13AF 003H004 13AF 003H005 13AF 049HOOB 13AF 049HOOC 13AF 050HOOA 13AF 076HOOB 13AF 055HOOB 13AF 055HOOC 13AF 005HOOA 13AF 005HOOB 13AF 005H009 13AF 005H002 13AF 005H001 13AF 027H002 13AF 027H005 SYS CL AF" AF
AF,.
CAT ACC REJ X
X COMMENTS
ATTACHMENT 41 SITE:
PALO VERDE
INDEPENDENT MEASUREMENTS INSPECTION SHT
OF
HANGER/SUPPORT DATE 3/05-3/16/90 1G/ ISO AFF-134 HANGER/SUPPORT SYS CL 13AF 027H003 CAT ACC REJ COMMENTS AFF-134 AFF-134 AFF-134 13AF 027H004 13AF 020H003 13AF 020H004 AF
AFF-134 AFF-134 AFF-134 AFF-134'3CT 021H001 13AF 027H001 13AF 011H001 13AF 011H025
ATTACHMENT 42 INDEPENDENT MEASUREMENTS INSPECTION SITE-PALO VERDE
EROSION/CORROSION DATE: 3/05-3/16/90 SOLDWQ MELD/PART ACC REJ SYS CL.
COMMENTS 3-P-CDF-402 C056-24-21 BOP FLOW TDC H
N
6
.375
.285
.265
.265.228
.475
.335
.410.295
.360.530.275
.210 220.220
.503.550.540
.771
.764
.772
.770
.770
.774
.775
.659.789
.335
.343
.527
.269.271
.257
.527
.489.480
.233 492.342
.230.373
.360
.258
.535
.225
.545 215
.544
.776
.780
.790
.490
. 196
.253
.230
. 198
.270
.285
.230
.310
.214
.484
.780
.788
.405
.492
.219
.279 198
. 219
WELD WELD
.850
.890
.804
.860
.834
.810
.840
.817
. 856
.832
. 850
.836
24
.680
.685
.690.700
.685
.695
.695
.700
.690.696
.703
.713
.711.710
.716
.711
.716.720
.720.719
.714
.714
.723
.718
.714.711
.707
.711
. 690
.700
.700
.700
.696
.700
.702
.704
.705
.716
.711
.707
.703
.704
33
.700
.700
.700
.690
.705
.685
.695
.690
.696 XXXX XXXX XXXX
.706 XXXX
.702 XXXX XXXX XXXX
.716 XXXX XXXX XXXX XXXX XXXX XXXX XXXX XXXX XXXX
.700
.685
.690
.680
.685
.685
.685
.686
.680
.690
.701
.702
.702
.700
.695
.695
.690
.680
. 675
.680
.675
.670 (WELD
.678
.675
.693
.697
.698
. 702 COMPONENT:
TEE TO SCH.
40 24 INCH PIPE NOM. WALL.687" (PIPE WALL THICKNESS SCHEDULE ASME/ANSI B36.10)
MIN. WALL.602" BOLD PRINT:
AREAS BELOW MINIMUMWALL THICKNESS (SEE REPORT EROSION/
CORROSION)
XXXX: AREAS WHERE THICKNESS MEASUREMENTS COULD NOT BE TAKEN DUE TO PIPE SUPPOR ATTACHMENT g2 SITE PALO VERDE
INDEPENDENT MEASUREMENTS INSPECTION EROSION/CORROSION DATE-3/05-3/16/90 IsoiDWG WELD/PART V-20-1 ACC REJ SYS CL.
COMMENTS FLOW V
TDC H
.985
.985
.980
.975
.967
.964
.959
.969
.981
.980
.992
.991
.993
. 995
.991
~
8 1. 05 1. 05 1. 05 1. 05 1. 05 1. 05 1. 05 1. 05 1. 05 1.05 1.05 1.05
.988
.999
.996
.983
.980.968
.988
.985
.985
.981.970
.969
.980
.969
.965
.978
.968
.960
.974
.959
.971
.975
.971
.967
.973
.970
.966
.971.969
.968
.975
.971
.965
.982
.970
.962
12 1.05 1.05 1.05 1.05 1.05 1.05 1.05 1.05
.999
.999
.999
.999
.985
.985
.988
.991
.992
.985
.983
.985
.969
.975
.969
.969
.965
.966
.960.970
.954
.960
.957
.970
16
.890
.715
.899
.742
.922
.762
.985
.873
.945
.765
.967
.810
.985
.696
.991.866
.989.851
.989
.801
.977
.830
.977
.850
.974
.807
.971
.807
.970.880
.980
.705
I
V
24 609 I. 616
. 639
. 613 V
.597(.597
.615
.603 V
595I.592
.619
~ 600 V
.598(.590
.626
.595 V
.597I.590
.624
.609 V
.696'.696
.621
.615 V
.607I.595
.630
.612 V
.623[.598 V
. 608 I. 601 V
.627
.613
.627
.606 6091 - 610
. 630
. 610 V
613I.615
.628
.612 V
.630I.611
.638
.626 V'617[.606.629 ;609 V
6131 615
.627
.599 V
.627
.615
.628
.600
~ 591I 595 615
.602 V
28
.597
.568
.601.580
.598
.580
.603
.585
.601.586
.600
.582
.595
.580
.589
.571
.580.569
.597
.557
.588.577
.590.579
.598.582
.599.579
.600.578
.604
.571 COMPONENT:
TEE TO SCH XS 24" X20" REDUCER NOM-WALL 500" (PIPE WALL THICKNESS SCHEDULE ASME/ANSI B36.10)
MIN. WALL.438" HEAVY WALL AREAS ON TEE SIDE OF WELD