IR 05000353/1986017
| ML20207P356 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 11/26/1986 |
| From: | Harris R, Kaplan H, Kerch H, Sterner P, Strosnider J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20207P355 | List: |
| References | |
| 50-353-86-17, IEB-82-01, NUDOCS 8701160015 | |
| Download: ML20207P356 (11) | |
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REGION I
Report No.
50-353/86-17 Docket No.- 50-353 License No. CPPR-107 Category A Licensee: Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101 Facility Name: Limerick Unit 2 Inspection At: Limerick, Pennsylvania Inspection Conducted: November 3-7, 1986 Inspectors: k }l h H.~ Keych,LeadReacorEngineer ' date ~ ab // 4kb ' .~ W. Haf+1's,' NOE Technician / date ' $N. W sLk ff f% t, lVL H. Kaplan, Reattor Inspector 'oatel yP.SterneF,Internk ud NN //dGdG date ///2/#6 Approvedby[:jd~. R Strosnider, Chief date V Materials and Processes Section, EB, DRS Inspection Summary: Inspection on November 3 through November 7, 1986 (Report No. 50-353/86-17) Areas Inspected: A routine, announced independent measurement pre-service inspection was conducted at the Limerick Unit 2 site consisting of a visual and nondestructive examination of selected safety related piping systems and associated piping support structures fabricated to ASME Code Class 1, 2 and 3.
In addition to the independent measurement activities, QA/QC documentation and personnel qualifications were reviewed.
Results: No violations were identified.
-, 8701160015 870106 DR ADOCK 0500
. . DETAILS 1.0 Persons Contacted Philadelphia Electric Co. (PECo)
- D. A. Di Paolo, QA Branch Head
- D. A. Marascio, QA Engineer-
- D. L. Schmidt, NDE Level III
- R. H. Zong, NDE Level III
- R. E. Crofton, QA Engineer J. M. Corcoran, QA Manager P. L. Naugle, Construction Supt. Asst.
-J. J. Kerecman, Construction Manager BechtelPowerCorporation(Bechtell
- S. J. Loofbourrow, QC Engineer
- R. Kerhin, QA Preservice Inspection
- J. Roulston, QA Supervisor
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- J. H. Khandhar, QC Engineer
- G. C. Bell, Project QA Engineer K. G. Stout, Project Construction QC Engineer
- G. J. Stoll, NDE Level III (Bechtel)
W. Press, Preservice Inspection Coordinator
- R. Palaniswamy, Assistant Projects Engineer
- J. T. Hawkins, Lead Preservice Inspection Technician
- D. S. Harden, Quality Engineer
- M. A. Drucker, QA Engineer
- P. W. Nederostek, Lead Engineer
- D. J. Arnold, QC Engineer Hartford Steam Boiler (HSB)
- A. Brooks, Authorized Nuclear Inspector (ANII)
- W. J. Mowbray, Authorized Nuclear Inspector (ANII)
General Electric (GE)
- M. A. Quirin, Project Manager
- W. F. Miller, Sr. NDE Specialist Nuclear Regulatory Commission (NRC)
P. Sterner, Intern
- Denotes those present at exit meeting
. .
2.0 Independent Measurements-Nondestructive Examination During the period of November 3 through-November 7,1986 an onsite inde-pendent verification inspection was conducted. The purpose of this inspection was to verify the adequacy of the licensee's preservice in-spection program.
An NRC inspector made a random selection of weldments intended to provide a sample of piping systems, piping materials and associated pipe supports.
The items selected were previously inspected and accepted by the licensee.
2.1 Nondestructive Examinaticn Nondestructive examinations were performed using NRC procedures, with the intent of duplicating the original examination to the extent practical.
[ The following examinations were performed.
Liquid Penetrant Examination: Nine (9) safety related pipe weldments and adjacent base material (1/2 inch on either side of weld) were examined using the visible liquid penetrant method per NRC Procedure NDE-9, Revision 0.
Samples examined were ASME Class I stainless steel piping weldments.
Results: No violations were identified.
Visual Examination (a) Nine (9) safety related pipe weldments and adjacent base material were visually inspected for weld reinforcement, any cracks or-linear indications, gouges and general surface condition. Visual examina-tions were performed per NRC Procedure NDE-10, Revision 0, Appendix A, in conjunction with site documents.
Samples examined were ASME Class 1 and 2 carbon and stainless steel pipe weldments.
(b) Twelve (12) safety related pipe supports were visually examined per NRC Procedure NDE-10, Revision 0, Appendix B, in conjunction with site construction drawings.
Support connections, welds, dimensions and support structures were examined for evidence of cracks, cor-rosion, wear, extraordinary movement, misalignment, loose or broken connections, missing or bent parts and improper installation.
Results: No violations were identified.
Magnetic Particle Examination , Three (3) safety related pipe weldments and adjacent base material (1/2 inch either side of weld) and four (4) lugs welded to safety
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related piping were examined using the dry magnetic method per NRC Procedure NDE-6, Revision 0.
This sample included ASME Class 2 weld-ments.
Results: No violations were identified.
3.0 Unistrut Welding During the course of this inspection, the inspector reviewed the welding of unistrut material and welding qualification.
PECo had assigned an engineer to perform an audit of Limerick 2 welding procedures and qualiff-- cations. The assigned engineer was aware of the problem with the welding of unistrut supports that the NDE Van has identified at other facilities such as: Thickness of unistrut material outside of AWS D1.1 requirements.
- Material for unistrut supports not listed as prequalified material
for AWS D1.1.
Flare bevel welding is not a prequalified joint for AWS D1.1.
- PECo's findings so far indicate Bechtel's procedures are in compliance with AWS DI.1 in the area of welding unistrut material. However, PECo has identified the type of problems listed above with the HVAC Contractor (Schnider) in the welding of unistrut material and is pursuing resolution of these problems.
- 4.0 Preservice Inspection (PSI) Program The inspector reviewed the following documents to ascertain compliance with applicable ASME code requirements, license commitments and regulatory requirements:
General Electric Procedure 8031-M-246B-141-1
Bechtel Procedure 8031-P-505R1
PSI computer listing
Facility Technical Specifications
Based on the foregoing, the licensee's PSI program is intended to meet the requirements of the ASME Boiler and Pressure Vessel Code, Section XI, 1980 Edition through winter 1981 addenda.
The PSI plan is divided into two sections.
The first section consists of items to be inspected by automatic ultrasonic testing. These include the reactor vessel and all Class 1 stainless steel piping.
The second section consists of all remaining items within the PSI program. These items will be ultrasonically examined using manual techniques.
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.The PSI program is controlled by a computer listing of requirements. The ,
status of each item on this list is tracked on the computer to assure all inspections are completed. -All documents and procedures reviewed by the . inspector, including the computer listing, were controlled by the li- > , censee.
- During this inspection it was revealed that there were 32 shop welds from Southwest Fabrication that contained indications requiring evaluation.
L .The licensee dispositioned 19 of the original 32 welds as requiring repair. The indications were determined by the licensee, at the time of i' . repair,'to be lack of' fusion just above the root pass of the weld and ranged in length from a spot to 360* around the weld. The indications .. were not readily detectable using an ultrasonic angle beam, but were detectable using a straight beam (perpendicular to the surface of the pipe weld), indicating that they may be oriented in a plane parallel to
i the inside surface of the pipe.
In discussions with PECo, they stated , that all the indications would be evaluated against the criteria stated.
. in~both paragraphs IWC 3514.2 and IWB 3514.6 of Section XI of the 1980 , ASME Code including Winter of 1981 addenda.
Paragraphs IWB 3514.2 and 3514.6 apply to planar and laminar flaws, respectively. PEco committed-to submit the results of these evaluations to Region I.
The subject shop , welded piping sections had been Code N stamped.
The inspector reviewed vendor radiographs of 8 of the welds having U.T. indications. As indi-cated in Attachment 3,'the indications were not detectable on the-radiographs. Given the nature and orientation of the defects, it is understandable why they were not detected using radiography.
. Results: This items is considered unresolved pending completion of the licensee's evaluation and subsequent review by the NRC (353/86-17-01).
- 5.
Organization and Staffing of the PSI Program ' j The Limerick 2 PSI program is performed and staffed by the following organizations: ' l Automatic ultrasonic examinations are performed by General Electric.
- F f
Manual ultrasonic examinations are performed by Bechtel.
- Magnetic Particle, Liquid Penetrant and Visual examinations are
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[ performed by Bechtel.
, ! - ' Analysis and acceptance of code ultrasonic data is performed by
Gilbert Associates.
' ,
The inspector concluded that the Limerick 2 PSI program is adequately staffed by site personnel and augmented by contract personnel to properly execute the program.
! No violations were identified.
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6.
Ultrasonic Data Review The inspector reviewed a sample of manual ultrasonic data from the following systems: Feedwater
High pressure coolant injection
Reactor water cleanup
Standby Liquid control
Residual Heat removal e Main Steam
The inspector also completed the following inspection activities: A sample of the automatic ultrasonic data from the recirculation
piping system was reviewed.
In process automatic ultrasonic scanning and data collection was
observed.
Weld centerlines were verified to be marked in accordance with ASME
Section XI requirements.
Equipment calibration was reviewed and the documentation and drawings
for the calibration blocks were verified to be in accordance with ASME requirements.
The process used at Limerick 2 to determine the ASME Section XI
. acceptability of the ultrasonic data was reviewed.
No violations were identified.
7.
Qualification of NDE Personnel The inspector reviewed eight nondestructive examination (NDE) personnel qualification and certification records and verified they meet ASME code and regulatory requirements. The records were reviewed to determine that experience, training and educational requirements were satisfied and that eye examination records were current.
8.
Items Reviewed During this Inspection and Closed (Closed) Unresolved Item #353/86-07-03 Main Steam Quencher - Although this piping is designed GBC (ASME Class 3), the installation drawing requires ' that these welds be examined per GBB (ASME Class 2) requirements for ra-diographic examination of pressure welds and ultrasonic examinations.
In inspection 86-07, a regional inspector questions the acceptability of the radiographic technique in use and whether ultrasonic examination was needed.
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The inspector reviewed the re-ridiographs and the radiographic technique used on the welds in questions (see Attachment 2 for listing). The ini-tial radiographs did not provide full coverage in that the heat affected zone af the weld could not be determined. The inspector reviewed the radiographic technique for this weld configuration that repositioned the lead arrow ">" directly adjacent to the weld and then reviewed the re-radiographs of the welds. The inspector concluded the radiographs now meet ASME code. Also reviewed was PECo's finding report F274729 that provided justification for not performing ultrasonic examination on plate material. The inspector determined that no ultrasonic examination is required. The inspector has no further concerns with this item and considers it closed.
(Closed) IEB82-01 Alteration of Radiographs of Welds in Piping Sub-Assem-blies - This bulletin supplied information concerning altered radiographs of welds in piping subassemblies delivered to Washington Public Power Supply System by Associated Piping and Engineering Corporation (AP&E).
The alteration consisted of artificial enhancement of the ASME code speci-fied penetrameter hole. The inspector reviewed the licensee's response to this bulletin, dated July 23, 1982, which reported that a 100% audit of AP&E radiographic films was conducted with no abnormalities found. A region based inspection also conducted a spot check of AP&E film for artificial enhancement and did not identify any abnormalities. This Bulletin is closed.
9.
Attachments Attachment No. 1 is a tabulation of specific items examined and the results. Attachment No. 2 is a list of specific radiographs reviewed in order to close out unresolved item 353/86-07-03. Attachment No. 3 is a list of specific radiographs reviewed and the results.
10. Unresolved Items Unresolved items are matters about which more information is required in order to ascertain whether they are acceptable, violations or deviations.
Unresolved items are discussed within this report in paragraph 4.
11.
Exit Interview The inspectors met with licensee representatives, denoted in paragraph 1 at the conclucion of the inspection on November 7, 1986. The inspectors summarized the purpose, scope and findings of the inspection. No written material was provided to the licensee by the inspectors.
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