IR 05000275/1986027
| ML16342C175 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 10/07/1986 |
| From: | Richards S, Wagner W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML16341D917 | List: |
| References | |
| 50-275-86-27, NUDOCS 8610210372 | |
| Download: ML16342C175 (8) | |
Text
U.
S.
NUCLEAR REGULATORY COMMISSION
REGION V
Report No. 50-275/86-27 Docket No. 50-275 License No.
DPR-80 Licensee:
Pacific Gas and Electric Company 77 Beale Street Room 1451 San Francisco, California 94106 Facility Name:
Diablo Canyon Unit 1 Inspection at:
Diablo Canyon Site, San Luis Obispo County, CA Inspection Conducted:
September 22-26, 1986 Inspector:
Approved by:
gner, eact nspector 1chards, hse Engineering Section a
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~Summar:
Ins ection durin the eriod of Se tember -22-26 1986 (Re ort No. 50-275/86-27 Areas Ins ected:
Routine, announced inspection by a regional based inspector o
1nserv)ce inspection activities.
During this inspection, Inspection Procedures 73052, 73753 and 73755 were covered.
Results:
In the areas examined, no violations or deviations were identified.
Bg10210372 861007 PDR ADOCK 05000275
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DETAILS 1.
Persons Contacted
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C. Thornberry, Plant Manager
~J.
A. Saxton, Plant Superintendent
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K. Franks, ISI/NDE Supervisor
"L. F.
Momack, Operations Manager
"D. Miklush, Maintenance Manager
~D.
A. Taggart, Director Quality Support QA
~K.
A. Levitt, Materials Services Manager
~T.
L. Gribel, Regulatory Compliance Supervisor D.
A. Gonzalez, NDE Specialist M. Leger, NDE Specialist
"Denotes those individuals attending exit meeting of September 26, 1986.
2.
Inse'rvice Ins ection - Review'of Procedures
The licensee filed their plans and schedules for inservice inspection (ISI) for this outage with theNRCin PG&E Letter No.
DCL-86-251 of August 22, 1986.
The plan is a descriPtion of the Class 1, 2 and
components scheduled for ISI dUring the first,refueling outage of Diablo Canyon Unit 1.
" The ISI program. plan was previously reviewed by the NRC as addressed in NRC Report No. 50-'275/86-26, The following ISI procedures were reviewed to>>assure adequate coverage of all required aspects of the ISI program:
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a.
QAP-9.A, Revision 9/23/85 "Control of Special Processes."
b.
N-UT-1, 'Revision 1 of 1/3/86 "Ultrasonic Examination Procedure for Pipe Melds."
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N-PT-l, Revision 2 of 5/30/86 "Solvent Removable Visible Dye Liquid Penetrant Examination Procedure."
N-VT-1, Revision 2 of 9/19/86 "VT-1 Visual Examination Procedure."
N-VT 3/4-1, Revision 1 of 12/24/84 "Visual Examination of Component and Piping Supports."
N-MT-l, Revision 2 of 5/30/86 "Magnetic Particle Examination Procedure Using Yoke and Prods."
AP-C-756, Revision 3 of 5/15/85
"ASME Section NI Repair/Replacement Progr am Implementati on. "
ISI C-850, Revision 3 of 2/2/86 "Verification of NDE Procedure and Per sonnel Qualification. "
ISI C-856, Revision 3 of 2/2/86 "Inservice Inspection Procedure.
Dispositioning of Recorded NDE Examination Data."
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2" The ISI procedures adequately covered all areas specified in the approved ISI program, and were approved by the authorized licensee personnel and by the Authorized Nuclear Inservice Inspector (ANII).
The technical
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content of, the procedures adequately described the methods of examination, extent, and technique, in compliance with applicable ASME Code Section V requirements.
J,iquid penetrant procedure N-PT-1 deviates from the ASME prescribed examination temperature range of 60-125'F.
However, the licensee provided the inspector with evidence showing proper code qualification within the temperature range of 50-125 F with approval by the licensee's ANII.
Procedural methods of recording, evaluating, dispositioning and reporting of findings were established.
The repair and replacement procedural elements were consistent with the applicable requirements of the ASME Code and the approved ISI program.
qualification of NDE personnel were specified for all NDE applications.
No violations or deviations were identified.
Inservice Ins ection - Observation of Work and Mork Activities The inspector observed liquid penetrant (PT) and ultrasonic examinations (UT) being performed on boron injection tank pipe weld number >IIC-348 (tee to pipe)
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To prevent masking of any possible indications, the PT examination was performed prior to UT.
Surface preparation for PT, application of penetrant and developer including recommended dwell times, penetrant removal, and visual inspection for surface indications were observed and found to be in compliance with ISI procedure N-PT-1.
The UT examination observed was found to be 'consistent with procedure N-UT-1 and the following ASME Section XI requirements:
the type of apparatus used, scanning technique, extent of coverage, calibration of the instrument and system prior to examination, beam angles, size and frequency of the search unit, limits of evaluation and recording of indications, and determination of acceptance limits.
The inspector also reviewed the chemical certifications of the UT coup]ant and the PT materials used and found the chloride and sulfur content not to exceed the one percent by weight requirement.
The inspector also observed visual examinations being performed on X-snubber and Y-restraint on line 1-K-81-20 of CCM Header 'A'eturn.
The visual examinations were performed using Y-restraint Drawing No.
049269, Snubber Drawing No.
049305; a traveler was attached to each drawing specifying the VT-3 and VT-4 items to be inspected.
The VT-3 visual examination included items such as loose or missing parts, welded connections, wear, debris and corrosion.
The VT-4 visual examination performed on the snubber included position setting, evidence of binding, fluid level and condition.
The visual examinations were properly conducted in compliance with ISI procedure VT 3/4-1.
The q'ualification and certification records of the NDE personnel performing the ISI examinations were reviewed by the inspector.
All personnel were qualified in accordance with ASME Section XI requirements.
No violations or deviations were identified.
Inservice Ins ection Data Review and Evaluation
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The inspector reviewed the NOE data generated on six welds to ascertain whether the following records were provided:
examination results and data sheets, examination equipment data, extent of examination, calibration data sheets, names of examiners, and examination evaluation data.
The ISI records reviewed were from the following areas:
a.
PT/UT on Meld No. MlB-42, Line 253 Accumulator Injection Loop/Pipe-to-Elbow.
b.
PT/UT on Weld No. M1B-RC-2-16, Line 254 Accumulator Injection Loop 2 Pipe-to-Nozzle.
c.
PT/UT on Weld No. M1B-210, Line 255 Accumulator Injection Loop 3 Tee-to-Nozzle.
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PU/UT on Weld No. 82, Line 236 Safety Injection Loop 4 Hot Leg Pipe-to-Reducer.
e.
PT/UT on Meld No.
MlB 217, Line 3846 RHR PP 1-2 Injection Cold Leg 3 Pipe-to-Pipe.
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MT/UT on Meld No.
MIGG 105-1, Line 554 Steam Generator Feedwater Supply Pipe-to-Elbow.
No violations or deviations were identified.
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The inspector met with licensee management representatives denoted in paragraph 1 on September 26, 1986.
The scope of the inspection and the inspector's findings as noted in this report were discusse II I,
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