ML18016A263
| ML18016A263 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 06/30/1997 |
| From: | Jacobs B, Todd S SOUTHWEST RESEARCH INSTITUTE |
| To: | |
| Shared Package | |
| ML18016A262 | List: |
| References | |
| NUDOCS 9712230012 | |
| Download: ML18016A263 (26) | |
Text
1997 AUTOMATEDINSERVICE EXAMINATION OF THE REACTOR PRESSURE VESSEL AND ADJACENT PIPING WELDS AT THE SHEARON HARRIS NUCLEAR PLANT, UNIT 1 VOLUMEI FINALREPORT WITH APPENDICES SwRI Project 8504 Prepared for Carolina Power & Light Company Harris Plant State Route 1134 New Hill, North Carolina 27562 Prepared by Nondestructive Evaluation Science and Technology Division June 1997 Prepared b
Approved b
Steven J. T d
Project Engineer NDE Engineering Section Department of NDE Services Br ce M. Ja bs Director Department of NDE Services
r~
ABSTRACT An automated inservice examination (ISI) ofthe reactor pressure vessel (RPV) and adjacent piping welds at Carolina Power &Light Company's (CP&L) Shearon Harris Nuclear Plant, Unit 1 (Hams Plant), was performed by Southwest Research Institute (SwRI) personnel during the 1997 refueling outage. The examinations were performed during Apriland May 1997. These examinations constitute the second ISI ofthe third period performed at the Harris Plant during the first 10-year interval of
'perations.
The RPV ISI was performed utilizing automated ultrasonic (AUT) nondestructive examination techniques.
The AUTexaminations were performed in accordance with the American Society of Mechanical EngineersSection XI, 1983 Edition with Addenda through Summer 1983. AtCP&L's request, the RPV shell welds were examined using procedures which were qualified in accordance with Appendix VOI of Section XI as implemented by the utility Performance Demonstration Initiative.
During the examination activities, an AUTexamination technique was applied Rom the inside surface ofthe outlet nozzle-to-pipe welds (both sides) and the elbow-to-inlet nozzle (nozzle side only) in lieu ofthe Code-required outside surface examinations.
The techniques used for these examinations had been previously qualified at Swtu.
The AUTexaminations revealed six Code-allowable reflectors. CP&Lpersonnel were notified ofthe Code-allowable reflectors.
Limitations to the examination coverage were experienced during the ISI and documented on the appropriate examination data records. A Coverage Report for the AUTexamination is presented in Appendix C (Tab C).
No indications of a reportable nature were observed during this ISI.
APPENDIX C EXAMINATIONCOVERAGE REPORT FOR THE SHEARON HARRIS NUCLEAR PLANT, UNIT 1, REACTOR PRESSURE VESSEL AND PIPING OLDS
e APPENDIX C EXAMINATIONCOVERAGE REPORT FOR THE SHEARON HARRIS NUCLEAR PLANT, UNIT 1, REACTOR PRESSURE VESSEL AND PIPING WELDS This appendix describes the automated ultrasonic (AUT) examination coverage obtained and examination limitations encountered during the 1997 inservice examination of the Shearon Harris Nuclear Plant, Unit 1, reactor pressure vessel (RPV) and selected piping welds. The examinations were performed by Southwest Research Institute (SwRI) using automated scanning equipment and AUTdata recording and analysis systems in accordance with a Scan Plan and procedures approved by Carolina Power Ec Light Company (CP8cL). These procedures comply with requirements of the 1983 Edition with Addenda through Summer 1983 of the American Society of Mechanical Engineers (ASME)Section XI and United States Nuclear Regulatory Commission Regulatory Guide 1.150, Rev. 1, Appendix A. In addition, the RPV shell welds were examined in accordance with Appendix VIIIof Section XI as implemented by the utility Performance Demonstration Initiative (PDI) and Section XI,IWA-2240.
The scope ofthe RPV AUTexaminations included all circumferential, longitudinal, lower head, nozzle inner radius, and nozzle weld areas for 100 percent of the accessible weld length.
The scope ofthe piping AUTexaminations included the inner I/3t volume ofthe inlet and outlet nozzle-to-safe end weld areas.
Where possible, the outside surface of these piping welds were also examined with ultrasonic (UT) techniques in lieu of the Code-required surface techniques.
As stated above, the RPV AUTexaminations were conducted using either conventional ASME Code techniques or techniques qualified by SwRI under the utilitysponsored PDI. The following is a description ofthe coverage requirements as it relates to the different techniques.
1.
RPV Examination Coverage Requirements Using PDI Techniques In accordance with ASME Section XI, IWA-2240, Alternative Examinations, SwRI implemented qualified PDI techniques for selected circumferential, longitudinal, and meridional welds as requested by CPS'.
The SwRI techniques and procedures are qualified for both single-
'nd double-sided detection capabilities.
The single-sided examination technique, which requires three examination angles, was utilized by SwRI to provide additional coverage when weld access was restricted.
The double-sided technique requires two examination angles and was used when access was not restricted.
The examination coverage requirements for this technique are as follows:
1.1 in le-ided Examination 1.1.1 e ectors rient d Parallel t
Id The examination for reflectors oriented parallel to the weld is performed with the beam directed perpendicular to the weld axis.
The first 1 inch of the inner 3.25" including the weld metal and adjacent base metal for V2t either side of the weld fusion line must be completely scanned with SLIC 40 search units.
The remainder of the inner 3.25" (Volume Ain the figures) must be completely scanned with SLIC 40 or 45-and 55-degree search units.
Scanning must be performed in at least one direction.
b.
The weld metal and adjacent base material in the outer volume beyond 3.25" (volume B in the figures) must be completely scanned with 45-and 55-degree search units.
Scanning must be performed in at least one direction.
C-1
I.I.2 e ect rs riented Transverse e Wel The examination for refiectors oriented transverse to the weld is performed with the beam directed parallel with the weld axis.
The first 1 inch of the inner 3.25" including the weld metal and adjacent base metal for 1/2t either side of the weld fusion line must be completely scanned with SLIC 40 search units.
The remainder of the inner 3.25" (Volume A in the figures) must be completely scanned with SLIC 40 or 45-and 55-degree search units.
Scanning must be performed in at least one direction.
b.
The weld metal and adjacent base material in the outer volume beyond 3.25" (volume B in the figures) must be completely scanned with 45-and 55-degree search units.
Scanning must be performed in at least one direction.
1.2 ouble-ided Examination I.2.I e t rs riented Parallel t the eM The examination for reflectors oriented parallel to the weld is performed with the beam directed perpendicular to the weld axis.
ao The first 1 inch of inner 3.25" including the weld metal and adjacent base metal for 1/2t either side of the weld fusion line must be completely scanned with SLIC 40 search units.
The remainder of the inner 3.25" (volume A in the figures) must be completely scanned with SLIC 40 or 55-degree search units.
Scanning must be performed in two directions 180 degrees to each.
other.
b.
The outer volume beyond 3.25" including weld metal and adjacent base material for 1/2t either side of the weld fusion line (volume B in the figures) must be completely scanned with 55-degree search units.
Scanning must be performed in two directions 180 degrees to each other.
1.2.2 Re ect rs riented Transverse to the WeM The examination for reOectors oriented transverse to the weld is performed with the beam directed parallel with the weld axis.
The first 1 inch of the inner 3.25" including the weld metal and adjacent base metal for 1/2t either side of the weld fusion line must be completely scanned with two SLIC 40 search units. The remainder of the inner 3.25" (Volume A in the figures) must be completely scanned with SLIC 40 or 55-degree search units.
Scanning must be performed in two directions 180 degrees to each other.
b.
The weld metal and adjacent base material in the outer volume beyond 3.25" (volume B in the figures) must be completely scanned with 55-degree search units.
Scanning must be performed in two directions 180 degrees to each other.
C-2
2.
RPV Examination Coverage Requirements Using Conventional Code Techniques
~ Conv'entional ASME Code techniques were utilized during the parallel examination of the nozzle-to-shell, nozzle inner radius, and flange-to-upper shell weld areas.
The examination coverage for these welds was determined in accordance with the requirements of Section V, T-441.
These requirements include the following:
ao For those examinations performed from the nozzle bores and flange seal surface, the UT beams must be directed essentially perpendicular to the plane ofthe weld to detect reflectors parallel to the welds. The beam angles used must be sufficient to provide complete coverage ofthe required volumes from one direction.
b.
The examination coverage for nozzle inner radius areas was determined in accordance with the requirements of Figure IWB-2500-7. The r'equired area must be scanned with 50/70 or SLIC 40 search units in two directions (clockwise and counterclock-wise) to detect radial-axial flaws.
3.
Piping Examination Coverage The examination coverage for the outlet nozzle-to-pipe and elbow-to-inlet nozzle welds is determined in accordance with the requirements ofSection XI,Appendix IG, Paragraphs III-4420 and III-4430. These requirements are as follows:
3.1 eflector Parallel to the Weld The inner 1/3t of the weld metal and adjacent base metal for 1/4 inch either side of the weld fusion line (volumeAinthefigures) mustbeexamined from two sides of the weld using the SLIC 40 or SLIC 20 search unit, with the beam directed perpendicular to the weld axis. The UT beam must pass through the volume in two opposing directions.
3.2 eflectors Transverse to the Weld The inner 1/3t of the weld metal and adjacent base metal for 1/4 inch either side of the weld fusion line (volume A in the figures) must be examined using the SLIC 40 or SLIC 20 search unit, with the beam directed parallel to the weld axis. The UT beam must pass through the volume in two opposing directions.
3.3 Reflectors on the utside urface The outer surface of the weld and 1/2 inch either side of the weld fusion line (surface B in the figures) must be examined using the SLIC 20 search units with the beam directed parallel and perpendicular to the weld axis.
4.
Summary of Limitations and Coverage Obtained The outlet nozzle integral extensions, the lower core support pads, the lower head specimen tubes, and the vessel flange limited scanning accessibility to the fulllength and/or width of some areas from the inside surface.
The examination coverage obtained is compared to the weld and base metal volumes identified as the examination areas in Figures 1 through 8 contained in this report.
AUT examination coverage tables in this appendix quantify the volume of material examined with each UT technique for each examination area.
C-3
e t
EXPLANATIONOF TKE EXAMINATIONCOVERAGE TABLES The followingcontains an explanation ofeach item listed in the Examination Coverage Table:
Summary Number
- The examination Summary Sheet Number that is assigned to each particular weld.
Weld Number The specific weld identification number as supplied by CPS'.
Exam Area Identification - Description ofthe weld type or component identification.
Exam Volume and Figure-The specific volume as identified in ASME Section XI, Regulatory Guide 1.150, Figures 1 through 8.
Beam Angle(s))
The refracted longitudinal-or shear-wave angles used for the examination.
Exam Type Beam Direction(s)
Code Coverage Remarks As defined in Article4 ofASME Section V, the type offlaw that each examination is intended to detect, e.g., flaws transverse or parallel to the weld, straight beam for planar or laminar flaws etc.
For each volume, the number of directions that the beam was directed to detect the type of flaw (parallel or transverse to the weld).
The percent of coverage of each volume, as a function of beam angle(s), examination type, and beam direction(s).
This section is used to explain the source or cause of any limitations encountered.
NOTES:
- 1. The average shown as a percent is a simple average of the coverage for all required examinations performed.
2.
The examination coverage report and coverage tables are restricted to examinations performed by SwRI, and do not reflect limitations from examinations performed by others during previous inservice inspections, or examinations that have been deferred.
Sumina INumber< ~~,Number~~kk Shearon Harris Nuclear Plant, Unit 1 1997 Reactor Vessel Inservice Inspection Examination Coverage Tables Qgp@
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< 0 ulIle'0 i!Sur'race' gC 'dg Coyerag CSW-RV-02
, Upper Shell
-to-Intermediate Shell A
A,B A
A,B SLIC 40 55'LIC 40 55'arallel Parallel Transverse Transverse 2 directions 2 directions 2 directions 2 directions 100%
100%
100%
100%
CSW-RV-03 Intermediate Shell
-to-Lower Shell A
A,B A
A,B SLIC 40 55'LIC 40 55'arallel Parallel Transverse Transverse Average 2 directions 2 directions 2 directions 2 directions 100%
100%
100%
100%
100%
LSW-RV-05 Upper Shell Longitudinal I25' A,B A
A,B SLIC 40 55'LIC 40 45',
55'arallel Parallel Transverse Transverse Average 2 directions 2 directions 1 direction 1 direction 100%
90%
100%
91%
83%
Transverse and parallel examinations limited due to nozzle AON-06 and flange taper.
LSW-RV-06 Upper Shell Longitudinal I215' A,B A
A,B SLIC 40 55'LIC 40 45',
55'arallel Parallel Transverse Transverse
. Average 2 directions 2 directions 1 direction 1 direction 91%
100%
100%
89%
96%
Transverse and parallel examinations limited due to nozzle BIN-03 and flange taper.
Average 96%
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Shearon Harris Nuclear Plant, Unit 1 1997 Reactor Vessel Inservice Inspection Examination Coverage Tables (Cont'd).
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001600 MHW-RV-15 Meridional I 105' oume;o
)~Surface Figure A
A,B A
A,B SLIC 40 55'LIC 40 45',
55'arallel Parallel Transverse Transverse
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2 directions 2 directions 1 direction 1 direction
~Code" Coyerag 91%
93%
92%
89%
Parallel and transverse examinations limited due to instrumentation tubes and a radial support lug.
001700 MHW-RV-16 Meridional I45' A,B A
A,B SLIC 40 55'LIC 40 45',
55'arallel Parallel Transverse Transverse Average 2 directions 2 directions 1 direction 1 direction 91%
93%
91%
87%
87%
Parallel and transverse examinations limited due to instrumentation tubes.
001710 FTSW-RV-01 Flange
-to-Upper Shell A,B A,B 2', 4', ll'arallel 55' SLIC 40'ransverse Average N/A 2 directions 90%
100%
33%
Limited transverse examination due to the inside surface taper.
002100 RVNOZAI-N-01 Inlet Nozzle I335',B A,B 6', 20'arallel 55' SLIC 40'ransverse Average TWD 2 directions Average 67%
100%
87%
93%
Transverse examination limited due to nozzle inner radius.
002200 RVNOZB0-N-02 002300 RVNOZBI-N-03 Outlet Nozzle I
265'nlet Nozzle I
215',B A;B A,B A,B 6',
20'5' SLIC 40,
20'5' SLIC 40'arallel Transverse Parallel Transverse TWD 2 directions Average TWD 2 directions Average 100%
60%
80%
100%
87%
93%
Transverse examination limited due to integral extension.
Transverse examination limited due to nozzle inner radius.
Shearon Harris Nuclear Plant, Unit 1 1997 Reactor Vessel Inservice Inspection Examination Coverage Tables (Cont'd).
Sum mti 002700 RVNOZCO-N-04 RVNOZCI-N-05 RVNOZAO-N-06 RVNOZAI-N-01-IRS
+~ ~z+Qe'je%fi
- ">IdentFicatlon>~
Outlet Nozzle 6
145'nlet Nozzle 6
95'utlet Nozzle O
25'nlet Nozzle O
335'~m
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Pigur'e A,B A,B A,B A,B A,B A,B
+@.37+~<>
6',
20'5' SLIC 40',
20'5' SLIC 40,
20'5' SLIC 40'0M0 Parallel Transverse Parallel Transverse Parallel Transverse Transverse L'<4'RDi~Pfon(s)g~ 'g TWD 2 directions Average TWD 2 directions Average TWD 2 directions Average 2 directions
~~Cadge,.
Coverag 100%
60%
80%
100%
87%
93%
100%
60%
80%
100%
Transverse examination limited due to integral extension.
Transverse examination limited due to nozzle innerradius.
Transverse examination limited due to integral extension.
002800 002900 RVNOZB0-N-02-IRS RVNOZBI-N-03-IRS Outlet Nozzle O
265'nlet Nozzle O 215' 7
SLIC 40 50MO Transverse Transverse 2 directions 2 directions 100%
100%
Examination limited due to the integral extension geometry.
003100 RVNOZCO-N-04-IRS RVNOZCI-N-05-IRS Outlet Nozzle O
145'nlet Nozzle O 95' SLIC 40 50M0 Transverse Transverse 2 directions 2 directions 100%
100%
Examination limited due to the integral extension geometry.
Shearon Harris Nuclear Plant, Unit 1 1997 Reactor Vessel Inservice Inspection Examination Coverage Tables (Cont'd)
MMAWz.g" Summa'Api"~
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003200 RVNOZAO-N-06-IRS Outlet Nozzle I25'LIC40 Transverse 2 directions 100%
Examination limited due to the integral extension geometry.
003300 RVNOZAI-N-01-SE Safe End
-to-Inlet Nozzle I335' A
SLIC 20 &40 Transverse SLIC 20 &40 Parallel 2 directions 2 directions Inner 1/3 Average 89%
59%
74%
Limitations due to the inside surface counterbore geometry B
B SLIC 20 SLIC 20 Transverse Parallel 2 directions 2 directions Outside Surface Average 20%
83%
52%
003400 RVNOZBO-N-02-SE Outlet Nozzle
-to-Safe End I265' A
SLIC 20 &40 Transverse SLIC 20 &40 Parallel 2 directions 2 directions Inner 1/3 Average 76%
75%
76%
Limitations due to the inside surface counterbore geometry.
003500 RVNOZBI-N-03-SE Safe End
-to-Inlet Nozzle I215' B
A A
B B
SLIC 20 SLIC 20 SLIC 20 &40 SLIC 20 &40 SLIC 20 SLIC 20 Transverse Parallel Transverse Parallel Transverse Parallel 2 directions
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2 directions Outside Surface Average 2 directions 2 directions Inner 1/3 Average 2 directions 2 directions Outside Surface Average 98%
88%
93%
99%
91%
95%
82%
66%
74%
Limitations due to the inside surface counterbore geometry.
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Vessel Welds with Tapers Figure 1
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I Vessel Shell Circumferential Welds Other Than Vessel to Flange Figure 2
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I Outlet Nozzle Inside Radius Section Figure 7
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122.38'25.55 0
45'0'80 270 315'60'/0'4,78'.
77.75'.
7456'.
7.88'.06 83.94'27 ARS 34A3'62A1 78.56'3 33 I
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HHV RV 16 45' HHV-RV-15 105'HV-RV-14 165' WV RV-13 225' I
CHV-RV-17 HHV-RV-12 HHV-RV-ll 285'45'hearon Harris Vessel Rollout 3 December 1996 RPV H-I
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