IR 05000270/1992004
| ML15219A067 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/05/1992 |
| From: | Blake J, Crowley B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML15219A066 | List: |
| References | |
| 50-270-92-04, 50-270-92-4, NUDOCS 9202240082 | |
| Download: ML15219A067 (11) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION
REGION II
101 MARIETTA STREET, ATLANTA, GEORGIA 30323 Report No.:
50-270/92-04 Licensee:
Duke Power Company 422 Church Street Charlotte, NC 28242 Docket No.:
50-270 License No.:
DPR-47 Facility Name:
Oconee 2 Inspection Conducted:
January 21-24, 1992 Inspector:
. F B. R. Crowley Date Signed Approved by:
Blake, Chief Date Signed Merials and Processes Section Engineering Branch Division of Reactor Safety SUMMARY Scope This routine, announced inspection was conducted on-site in the area of Inservice Inspection (ISI).
The inspection included a review of. the ISI inspection plans for this outage; reviews of nondestructive examination (NDE)
procedures; observations of in-process NDE examinations; review of NDE personnel qualifications; review of NDE equipment calibration and material certification documentation; and review of in-process NDE examination dat Resul ts In the areas inspected, violations or deviations were not identifie This inspection indicated that, in general, a good ISI program.was in place with good implementation. ISI nondestructive examinations were being conducted by qualified personnel in accordance with applicable procedure The procedures and examination techniques used to conduct the examinations were adequate and documentation of examination results was very goo PDR ADOCK 05000270 G
REPORT DETAILS 1. Persons Contacted Licensee Employees
- N. Barron, Station Manager B. Cheezem, Manager - NDE, Generation Services Department
- T. Coleman, ISI Coordinator, Component Engineering Group
- J. Hampton, Vice President, Oconee Nuclear Station
- J. McArdle, Level III Nondestructive Test Examiner
- S Perry, Assistant License Coordinator
- R. Rouse, Nuclear Services Department -.ISI Specialist Other licensee employees contacted during this inspection included craftsmen, engineers, security force members,-inspectors, technicians, and administrative personne Contractors R. Elgin, ANII, Hartford Steam Boilers H. Stoppelmann, Level III Nondestructive Test Examiner, B&W A. Richmond, Job Supervisor Vessel UT, B&W NRC Resident Inspectors
- K. Poertner, Resident Inspector B. Disai, Resident Inspector
- Attended exit interview Acronyms and Initialisms used throughout this report are listed in the last paragrap.
Inservice Inspection (ISI)
The inspector reviewed documents and records, and observed activities, as indicated below, to determine whether ISI was being conducted in accordance with applicable procedures, regulatory requirements, and licensee commitments. The applicable code for ISI is the American Society of Mechanical Engineers Boiler and Pressure Vessel (ASME B&PV) Code,Section XI, 1980 Edition with Addenda through Winter.1980, except selection of category B-D class 3 components is in accordance with the 1980 Edition including Addenda through the Winter of.1982. The Safety Evaluation Report (SER)
for the second ten year ISI plan and relief request is dated May 14, 1991. Oconee 2 is in the 12th refueling outage and the 3rd period-of the second ten year ISI interval. There will be one more refueling outage prior to the end of the 2nd 10 year interval, which ends March 1, 199 The licensee's Generation Services Department is responsible for the nondestructive examination (NDE) program and furnishes inspection personnel, except for specialized inspection such as Eddy Current (ET)
inspection of steam generators and automatic Ultrasonic (UT) inspection of the reactor vessel (RV).
For the current outage, B&W is performing the data acquisition portion of the steam generator ET inspection and the data is being analyzed by DPC personnel at McGuir B&W is also performing data acquisition for the RV UT inspectio The data is being analyzed by B&W at their Lynchburg facilit ISI Program Review (73051)
The inspector reviewed the following documents relating to the ISI program to determine whether relief requests had been approved by the NRC, the services of an Authorized Nuclear Inservice Inspector (ANII)
had been procured, the plan had been approved.by the licensee and to assure that procedures and plans had been established (written, reviewed, approved and issued) to control and accomplish the following applicable activities:
program organization including identification of commitments and regulatory requirements, preparing plans and schedules, and qualification, training, responsibilities, and duties of personnel responsible for ISI; personnel qualification requirements; and guidance for identifying and processing relief request Second Ten-Year Interval Inservice Inspection Plan, Revision 6 DPC QA Dept Pre-Service Inspection System Oconee Unit 2 RFO #12
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QCL-5, Revision 1, Control of Preservice and Inservice Inspection Activities
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QA-513, Revision 6, Control of Inservice Inspection Plans and Reports
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QA-514, Revision 3, Procedure for Discrepancies Identified During Inservice Inspection Visual Examination of Supports (ONS and MNS Only)
QA-516, Revision 1, Evaluation of IS1 Indications Review of the above specifications and procedures, discussions with ISI personnel, and observation of ISI activities revealed that, in general, ISI activities appeared to be adequately controlle However, based on discussions with personnel.performing ISI activities, a recent reorganization has changed the organizational structure for ISI personne The effectiveness of these changes will be evaluated during future inspection In.order to assess the status of ASME.Section XI relief requests, the inspector selected a sample of relief requests for verification that the licensee's inspection program met the provisions of the NRC Safety Analysis Report (SER)
dated May 14, 199 This review revealed that.in some cases, the SER had either, denied the relief request, or approved the relief request with conditions. In some cases, the program had not been changed to agree with the denial or the stipulated conditions, although inspections were progressin Examples are as follows:
Relief requests ONS-001 and ONS-002 involved request to inspect certain RV nozzle-to-safe end welds and nozzle-to-pipe welds using volumetric UT inspection from the inside surface in lieu of the code required volumetric inspection and an outside surface inspection. The SER granted the relief with condition One condition was that the UT instrumentation and procedures be demonstrated capable of detecting 0.D. surface connected defects in the circumferential orientation in a cracked, versus machined notches, laboratory test bloc.,Relief request ONS-003 involved use of calibration block 40350 (a flat block) in lieu of the code required block of the same nominal diameter and thicknes Relative to requests ONS-001 and ONS-002 and the use of a cracked block for demonstration of the inspection technique, the licensee pointed out that, if the final resolution requires demonstration on a cracked block, the demonstration can be performed after the inspectio Relative to the use of the flat versus curved block, a later edition of the code allows the use of a flat block for the welds in questio Further discussions revealed that, in June and July, 1991, personnel responsible for the ISI program had written responses justifying licensee positions on the NRC SE However, as of this inspection, the responses had not been transmitted to the NR Although 10 CFR 50.55a does not require that all code relief requests be approved prior to the end of the inspection interval, it is prudent to resolve these issues as soon as practical to preclude re-performing inspections and incurring additional dose if the relief requests are not approve b. Review of NDE Procedures (73052)
(1) The inspector reviewed the procedures listed below to determine whether these procedures were consistent with regulatory requirements and licensee commitments. The procedures were also reviewed in the areas of: procedure review and approval in accordance with licensee's QA program, requirements for
qualification of NDE personnel, compilation of required records, and division of responsibility between the licensee and contractor personnel, if applicabl NDE-B, Revision 16., Training, Qualification, and Certification of NDE personnel
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NDE-25, Revision 14, Magnetic Particle Examination Procedures and Techniques
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NDE-35, Revision 4, Liquid Penetrant Examination
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NDE-620, Revision 0, Ultrasonic Examination of Welds in
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Wroght Ferritic Pressure Vessels Greater Than 2 Inches in Thickness
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NDE-640, Revision 0, Straight Beam Ultrasonic Examination of Welds and Base Material in Pressure Vessels and Piping
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ISI-510, Revision 11, RPC System Operating Procedure
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ISI-418, Revision 7, Technical Procedure for.Multi-Frequency Eddy Current Examination of OTSG Tubing in 177 S/G Using MIZ-18/18A (2) Liquid Penetrant Examination (PT)
In addition to the general review above, the inspector reviewed the PT procedure for technical adequacy and conformance with ASME,Section XI and Section V, Article 6, and other licensee commitments/requirements in the following areas:
specified method; penetrant material identification; penetrant materials analyzed for sulfur; penetrant materials analyzed for total halogens; surface temperature; acceptable pre-examination surface conditioning; method used for pre-examination surface cleaning; surface drying time prior to penetrant application; method of penetrant application; penetrant dwell time; method used for excess penetrant removal; surface drying prior to developer application, if applicable; type of developer; examination technique; evaluation techniques; and procedure requalificatio (3) Magnetic Particle Examination (MT)
In addition to the general review above, the inspector reviewed the MT procedure for technical adequacy and for conformance with the ASME Code Section XI and Section V, Article 7, and other licensee commitments/requirements in the following areas:
examination methods; contrast of dry powder particle color with background; surface temperature; suspension medium and surface temperature requirement for wet particles; viewing conditions; examination overlap and directions; pole or prod spacing; current or lifting power (yoke); and acceptance criteri (4) Ultrasonic Examination (UT)
In additional to the general review above, the inspector reviewed the UT procedures for technical.adequacy and conformance with ASME, Sections XI and V, and other licensee commitments/requirements in the following areas:
type of apparatus used; extent of coverage of weldment -calibration requirements; search units; beam angles; DAC curves; reference level for monitoring discontinuities; method for demonstrating penetration; limits for evaluating and recording indications; recording significant indications; and, acceptance limit (5) Eddy Current Examination (ET)
In addition to the general review above, the inspector reviewed the ET procedures for technical adequacy and conformance with ASME Code c. Observation of Work and Work Activities (73753)
The inspector observed-work activities, reviewed certification records of NDE equipment and materials, and reviewed NDE personnel qualification records as detailed belo (1) Liquid Penetrant Examination (PT)
The inspector observed the in process PT examinations as indicated belo The observations were compared with the applicable procedure and the ASME B&PV Code in the following areas:
specified method, penetrant materials identified; penetrant materials analyzed for halogens and sulfur; acceptable pre-examination surface; surface temperature; surface drying time prior to penetrant application; method of penetrant application; penetrant dwell time; method used for.excess penetrant removal; surface drying.prior to developing, if applicable; type of developer; examination technique; evaluation technique; and, reporting of examination result Examinations Observed WELD NUMBER PIPE SIZE 2-54A-5-22 10"x. 250" 2-54A-5-17 10"x. 250" 2-54A-5-16 10"x.250" 2-53B-18.1-71 14"x. 250"
2-530-17.4-120 14"x.250" 2-53B-17.4-96 14"x. 250" 2-53B-17.4-93 14"x.,250" During observation of these PT inspections, the inspector noted that licensee NDE inspectors identified longitudinal pipe welds in elbows adjacent to welds 2-53B-17.4-93 and 120, that.were not identified on the weld ISO The NDE inspectors stated that their instructions were to visually inspect for longitudinal welds when inspecting circumferential welds, inspect the code required length (2-1/2 t) of the longitudinal weld and report the longitudinal weld to the ISI Coordinator for including in the progra Further discussions with licensee personnel revealed the following relative to identification and inspection of longitudinal welds in piping:
The applicable code requires inspection of 2-1/2t of longitudinal welds that intersect circumferential welds that require inspectio At the end of the 1st ten-year inspection interval, the licensee attempted to identify all longitudinal welds requiring inspection, by review of drawings and material test reports and specification Longitudinal welds that could be identified from reviewing vendor documentation were added to the inspection plan. However, for class 2 piping, it was not always clear from the old documentation whether piping components were seamless or welde Therefore, throughout the current interval, inspection personnel have been instructed to identify longitudinal welds during inspection of circumferential welds and add the welds to the program as noted abov NDE procedures define the inspection area to include the 2-1/2t length of intersecting longitudinal weld when inspecting circumferential weld The inspector questioned a number of NDE inspection personnel and all were aware of the requirement to inspect for longitudinal welds and identify the welds for including in the inspection progra The inspector reviewed the program and found that longitudinal welds have been added to the program as the interval has progresse (2) Ultrasonic Examination (UT)
The inspector observed calibration activities and the in-process UT examinations as indicated belo These observations were compared with the applicabTe procedures and the ASME B&PV Code in the following areas: availability of and compliance with approved NDE procedures; use of knowledgeable NDE personnel; use
of NDE personnel qualified to the proper level; type of apparatus used; calibration, requirements; search units; beam anal es; DAC curves; reference level for monitori n di scobtinuities; method of demonstrating penetration; extent of 1,11d/compcrent examination coverage; limits of evaluating and recording indications; recording significant indications; and, acceptance limit Examinations Observed Steam Generator Cirth Weld 2SGB-WGB-8:
Observed calibration for 0 and 15 deGree exams Observed portions of 0, 15, 45, ard CO degree exams During the 60 decree examination, a low amplitude;.360 degree intermittant indication was identifie At the.close of the inspection. the indication was still being evaluate (3) Eddy Current Inspection The following summarizes the licensee's steam generator ET inspectir prcgrza anid.status for the current outaYU:
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"BOBBIN" prcbc -
The planned inspection included full length inspection of approximately 60% (9292 for S/G "A" and 9260 fcr./C "F") of the tubes in each generatoe At the.close of the irspection, 5791 S/G "A" tubes and 4409 S/G B. tubes had beer inspecte No confirmed pluoqErs had been identifie "SLEEVE/CROSSWOUND"
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The planned inspection included 124 tubes in each S/ Inspection had been completed and all irspection results analyzed and. resolved for the sleeve inspection "MRPC LANE & WEDGE" -
For "Lane and Wedge" area tubes, the planned inspection included 220 tubes in S/G "A" and 196 tubes in S/G "B".
At the close of the inspection, 207 tubes in S/G "A" and 190 tubes in S/G
"B."
had been inspected with no confirmed plugger "RE-EXPANDED TLIBES" Two tubes in each S/G were in the inspection progra One tube in S/G B" had been inspecte No pluagers were identifie "RkOLLED PLUGS"
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The planned inspection included 56 plugs in S/G "A" and 61 plugs in S/G "B".
This included 20% of the inconel-600 pluqs and IM0%
of the inconel-690 plug P11 pluas had been inspected and the inspection results resolvce The inspector observed data acquisition for the "BOBBIN" inspection of the following tubes:
S/G ROW COLUMN A
42 A
34 A
23 A
21 B
8 B
9 B
10 B
11 B
12
57
B
14 B
15 B
16 B
17 In addition. the inspector observed "End of-Tape" calibration for tape 3 (4) Personnel Qualifications The inspector reviewed personnel qualification documentation as indicated belowi for examiners who performed the examinations detailed in paraoraphs (1), (2),
and (3) above. These personnel quClifications were reviewed in the followind areas:
employer's name; person certified; activity qualified to perform;. current period of certification; signature of. employer's desigrated represntive basis used for certification; ard, annual visual acuity, color vision examination, and periodic recertificatio Examiner Records Examined Method Level Employer Number PT II DPC
UT I
ET I
ET 1W In addition qualification records for one DPC Level TII examiner were revie (5)
Equipment Certification Records
. Equipment certification records as listed below, for equipment used in the inspectienrs. detailed in paragraphs. (1), (2) and (3)
above, were reviewed to ensure compliance with all applicable requirement Equipment Type Equipmient Identification Penetrant Cleaner Batch 90C074 Penetrant-Batch 87K043 Peietra nt Developer Batch 69EC1K UT -Coul.F.rt Ultragel II Batch 9088 UT Instrument - Model 2002 Serial 1363 UT Ir;strurert - Model USD-10 Serial 31501-921 UT Instrument - Model USI-10 Serial 33i875-2536 UT Transducer Serial 1,118425 UT Transducer Serial M17211 UT Transducer Serial D13 23 UT Transducer
.Serial F21874 T 7 - I F PI, ET System Serial 1111 MIZ-18 RDAU ET System Serial 1112 HIZ-18 R DAU ET Svstem Serial 1113 MIZ-18 RDAU ET System Serial 1117 MIZ-18 RDAU ET SVstcr Seria 1120 d. Data Review aBd Evaluation (73755)
In-process datC for,he PT ard UT inspections observed ir paragraph Phcvc, iere reviewe Tr general, a good. ISI programn wa i piace with good implementatitor';.
T 451 Pex nAmiratns were being conducteb by quaified personnel *in accordanc with applicable procedurc In the areas inspected, no -vioiatiurl cr deviations were identifie ExitSinterview The inspection sccpre rd results were summarized on J2anuary 24, 1992, with those persons incicated in paragraph 1. The inspector described the areas inspectc-d are. discussed in detail the inspection results..,
Proprietary information is not contained in~ this report. Dissenting comments were not receive frrrr the license *. Acronyms ard Initialisms ANII
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Authorized Nucpear Inservice Inspector ASE
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American Society of Mechanical Enoineers B&PV
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Boiler and Pressure Vcssel B&W
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Babcock & Wilcox DAC
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Distance Amplitude Curve DPC
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Duke Power Company ET
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Inservice Inspection ISO
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Isometric Drawino MNS
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McGuire Nuclear Station MT
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Maanetic Particle NDE
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Nondestructive Exaniration NRC
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Nucler PReulatory Commission Outside Diameter ONS
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Oconee Nuclear Statio OTSC
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Once Through Steam Generator PT
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Quality"Assurance RDAU
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Remote Diital Data Acquisition System RFO
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Refuelinc Outage RPC
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Rotating Pancake Coil RV
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Reactor Vessel S/G Stearn Generat6r SER
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Safety Evaluation Report UT-Ultrasonic Test