IR 05000282/1979020
| ML19209B182 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 08/29/1979 |
| From: | Danielson D, Ward K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML19209B178 | List: |
| References | |
| 50-282-79-20, NUDOCS 7910090288 | |
| Download: ML19209B182 (8) | |
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U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION III
Report No. 50-282/79-20 Docket No. 50-282 License No. DPP-42 L censee: Northern States Power Company 414 Nicollet Mall Minneapolis, MN Facility Name:
Prairie Island Nuclear Generating Plant, Unit 1 Inspection At:
Prairie Island Site, Red Wing, Minnesota
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Inspection Conducted: August 14 and 15, 1979
%A7ba Inspector:
K. D. Ward
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Aw Approved By:
D. H. Danielson, Chief d'!c79!79 Engineering Support Section 2 Inspection Summary Inspection on August 14 and 15, 1979 (Report No. 50-282/79-20)
Areas Inspected:
QA/QC program, review and evaluate nondestructive examination (VDE) and welding data, reports and radiographs of feedvater piping repair activities. Also QA/QC program, review and evaluate NDE data and reports of inservice inspection (ISI). This inspection iavolved a total of 8 inspector-hours c., site by one NRC inspector.
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Results:
No items of noncompliance or deviations were identified.
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DETAILS
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Persons Contacted Northern States Power Company (NSP)
J. Brokaw, Superintendent Operation and Maintenance D. Hansen, Engineer, ISI Coordinator S. Fehn, Senior Sch. Engineer A7 Hunstad, Staff Engineer All of the above were present at the exit interview.
Functional or Program Areas Inspected IE Bulletin 79-13, Unit 1 1.
General Information IE Bulletin 79-13 was sent to all pressurized water reactor facilities informing the licensee's of the cracks in feedwater system lines at the D. C. Cook site.
Being Unit 1 was shutdown because of turbine problems, radiographic and ultrasonic examinations were performed in accordance with the IE Bulletin 79-13.
When radiography was performed, an unacceptable wormhole and slag inclusion was revealed in weld No. FW-159, Loop A.
The recent radiographs were compared with the original radiographs taken in 1970. The recent radiographs had a better technique than the original therefore the defects were more clear.
AZCO, Inc. Appleton, Wisconsin, was contracted to perform the repair.
Peabody, Magnaflux Corporation was contracted to perform the radiography only.
Lambert, MacGill, Thomas, Inc. (LMT) was contracted to perform ultrasonics, liquid penetrant and magnetic particle examinations.
The ANI was present for the weld repair.
2.
Procedure Review The following procedures were reviewed.
a.
Northern States Power Company (Prepared by LMT)
Visual Examination, NSP-VT-1, Rev. 1, March 27, 1978, ASME Section V and XI, 1974 Edition, Summer 1975 Addenda.
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Visual Examination of Assembled Hanger Assemblies, NSP-VT-2, Rev. 1, September 19, 1979, ASME Section V, 1974 Edition, Summer 1975 Addenda.
Liquid Penetrant Examination, NSP-PT-1, Rev. 1, September 8, 1977, ASME Section V, 1974 Edition, Summer 1976 Addenda.
Magnetic Particle Examination (Yoke), NSP-MT-1, Rev.
1, September 8, 1977, ASME Section V, 1974 Edition, Summer 1976 Addenda.
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Ultrasonic Examination of Pipe Welds, NSP-UT-1, Rev. O, March 18, 1977, ASME Section V, 1974 Edition, Summer 1976 Addenda.
b.
Peabody, Magnaflux Corporation Radiographic Examination of Welds, 3.20. A.1-3, Rev. O, September 1, 1977, ASME Section V, 1974 Edition, Winter 1976 Addenda, c.
AZCO, Incorporated Welding Procedure ANITH-A, gas tungsten and shielded metal arc processes, B31.1, 1978. Procedure qualified to ASME Section IX, 1974 Edition.
No items of noncompliance or deviations were identified.
3.
Personnel Qualification Revie_w a.
AZCO, Incorporated, Welding J. Dorniden No. BA M. Knutson No. AH b.
Lambert, MacGill, Thomas, Incorporated, NDE Name Level Method D. Gonzalez II UT-PT D. Liembach I
UT R. Pechacek II UT S. Smith I
UT W. Tighe Trainee UT E. Thomas III UT-PT-MT E. Thomas I
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Peabody Magnaflux Corporation, NDE Name Level Method R. Carpente II RT C. Brown II RT 11'l)
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K. Erickson I
RT D. Olsen III RT T. Puchtel I
RT M. Sherwin III RT No items of noncompliance sr deviations were identified.
4.
Material and Equipment Certifications Review The following items were reviewed.
a.
Weld Rod 50 No. E705-2, 3/32" HT. 065162 50 No. E70S-2, 1/8" HT. 065163 50 No. 7018, 3/32" HT. 422B3681 200 No. 7018, 1/8" HT. 432C0201 200 No. 7018, 5/32" HT. 42158021 b.
Ultrasonic Couplant, LMT GEL, Batch No. 111778 c.
Ultrasonic instruments, recorders, calibration blocks, and transducers.
d.
Magnetic Particle equipment.
e.
Liguid Penetrant, Magnaflux Materials Cleaner - Batch No. 78LO35 Penetrant - Batch No. 7A004 Developer - Batch No. 6K069 No items of noncompliance or deviations were identified.
5.
Repair Weld FW-159 was ground out leaving an area approximately 3 1/2" long and 7/8" deep. The gauged area was then PT and MT examined to varify that the defect was removed. The root pass was welded in and a MT was performed when the root pass was completed.
UT, RT and MT was performed after final post weld heat treatment (PWHT) and found to be acceptable.
No items of noncompliance or deviations werc identified.
6.
Review of Radiographs The inspector reviewed the following radiographs as specified in IE Bulletin No. 79-13:
ISO No.
Weld No.
Diameter Thickness Date RT ISI-52A FW164 16" 0.64" 7/79 (Nozzle to Pipe)
ISI-69A FW216 16" 0.62" 7/79 (Pipe to Nozzle ISI-52A FW163 16" 1.03" 7/79-4-1F?
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ISI-52A FW157 16" 1.12" 7/79 ISI-52A FW158 16" 1.16" 7/79 ISI-52A FW160 16" 1.05" 7/79 ISI-52A FW162 16" 1.15" 7/79 ISI-52A FW155 16" 1.30" 7/79 ISI-52A FW153 16" 1.05" 7/79 ISI-152A FW156 16" 1.06" 7/79 ISI-52A FW154 16" 1.02" 7/79 ISI-52A FW152 16" 1.06" 7/79 ISI-52A FW151 16" 1.17" 7/79
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ISI-52A FW161 16" 1.03" 7/79 ISI-69A FW215 16" 1.03" 7/79 ISI-69A FW213 16" 1.05" 7/79 ISI-52A FW150 16" 1.15" 7/79 ISI-52A FW227 16" 1.16" 7/79 ISI-52A FW149 16" 1.11" 7/79 ISI-52A FW148 16" 1.06" 7/79 ISI-52A FW159 16" 1.12" 7/79 ISO No.
Base Metal Diameter Thickness Date RT ISI-52A Lopp A 16" 1.03" 7/79 ISI-52A Loop B 16" 1.03" 7/79 No items of noncompliance or deviations were identified.
7.
Data and Audit Review The followirg documents were reviewed:
Surveillance data performed by NSP.
a.
b.
Welding process and data sheets.
No items of noncompliance or deviations were identified.
8.
Conclusion The construction testing and repair of the feedwater sections appeared to satisfy the applicable procedures and code requirements. RIII will review the licensee's written response to IE Bulletin 79-13 upon receipt. This is an unresolved item.
(282/79-20-1)
Inservice Inspection 1.
General Information a.
Lambert, MacGill, Thomas, Incorporated (LMT) performed the inservice inspection (ISI) in accordance with ASME Section XI, 1974 Edition, Summer 1975 Addenda, b.
The ANI was present for the ISI.
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2.
Review of Program and Procedures a.
The ita'ector established through review and discussion with the li _nsee representatives that the NSP ISI Program was in accordance with ASME Section XI, 1974 Edition, Summer 1975 Addenda. The program was organized as " fill in time" when LMT was not performing NDE in accordance with Bulletin 79-13.
b.
LMT prepared the following NSP procedures.
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Ultrasonic Examination of Pipe Welds, NSP-UT-1, Rev. O, March 18, 1977.
Liquid Penetrant Examination, NSP-PT-1, Rev. 1, September 8,
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1977.
Visual Examination, NSP-VT-1, Rev. 1, March 27, 1978.
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Visual Examination of Assembled Hanger Assemblies, NSP-VT-2,
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Rev. 1, September 18, 1978.
No items of noncompliance or deviations were identified.
3.
Data Review and Evaluation Review of the data files for the following systems demonstrated that the QA/QC and technical requirements were met.
The specified information was available for the UT, PT and VT examinations performed.
Circ. Butt Welds Class I Component Line No.
ISO No.
Weld No.
NDE Seal Injection B 2-VC-21E 27A W-14 UT-VT Seal Injection B 2-VC-21B 27B W-15A UT-VT Auxiliary Spray to Pressurizer 2-RC-19
W-8 UT-VT Auxiliary Spray to Pressurizer 2-RC-19
W-9 UT-VT RTD C. L. A.
2-RC-8A
W-22 UT-Vf RTD C. L. A.
2-RC-8A
W-20 UT-VT RTD H. L. A.
2-RC-7A
W-19 UT-VT Socket Weld Component Line No.
ISO No.
Weld No.
2-RC-7A
SW-10 PT-VT-6-
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Pressure Retaining Bolting
Component ISO No.
Weld No.
KDE RTD Cold Leg A
RC-1-12 VT Supports (Non Welded)
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Component ISO No.
Weld No.
NDE Seal Injection A 11A RCVCH-1247, Al VT RTD C. L. B.
137-RTD-3, D VT Drain X-Over B
RPCH-17, A VT Letdown Line
RPCH-139, C1
_ VT Letdown Line
RPCH-126, D
'VT PZR Surge B
RPCH, 43, D VT PZR Surge B
134-RC-4 C1 VT Auxiliary Spray to PZR
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RPCH-7, D VT Auxiliary Spray to PZR RPCH-6, E VT
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No items of noncompliance or deviations were identified.
4.
Material and Equipment Certification The inspector reviewed the following items, a.
Ultrasonic Couplant, LMT GEL, Batch No. 111778.
b.
Ultrasonic instruments, recorders, calibration blocks, and transducers.
c.
Liquid Penetrant, Magnaflux materials.
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Cleaner - Batch No. 78LO35 Penetrant - Batch No. 7A004
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Developer - Batch No. 6K069 No items of noncompliance or deviations were identified.
5.
NDE Personnel Certifications Name Level Method D. Gonzalez II UT-PT D. Liembach I
UT R. Pechacek II UT S. Smith I
UT-7-3gg
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W. Tighe Trainee LTT E. Thomas III UT-PT-MT E. Thomas I
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Unresolved Items Unresolved items are matters about which more information is required in ogier to ascertain whether they are acceptable items, items of noncompliance, or deviations. An unresolved item disclosed during the inspection is discussed in Paragraph 8.
Exit Interview The inspector met with the site representatives at the conclusion of the inspection. The inspector summarized the scope and findings of the inspection noted in the report.
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