IR 05000346/1982012
| ML20052B591 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 04/13/1982 |
| From: | Danielson D, Ward K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | |
| Shared Package | |
| ML20052B586 | List: |
| References | |
| 50-346-82-12, TAC-48349, NUDOCS 8205030338 | |
| Download: ML20052B591 (4) | |
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U.S. NUCLEAR REGULATORY COMMISSION Region III Report No. 50-346/82-12(DETP)
Docket No. 50-346 License No. NPF-3 Licensee: Toledo Edison Company Edison Plaza 300 Madison Avenue Toledo, OH 43652 Facility Name: Davis-Besse Nuclear Power Station, Unit 1 Inspection At: Davis-Besse Site, Port Clinton, OH Inspection Conducted: April 5 and 7, 1982 g/Irt4um-
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,K 3!#L Inspector: g. D. Ward l
dWLN}A-Approved By:
D. H. Danielson, Chief
/ 3/P 2-Materials and Processes Section Insepction Summary Inspection on April 5 and 7, 1982 (Report No. 50-346/82-12(DETP))
Areas Inspected:
Review of inservice inspection (ISI) data; material and equipment certifications; nondestructive examination (NDE) personnel certi-fications and observed work activities. The inspection involved a total of six onsite inspector-hours by one NRC inspector.
Results: No items of noncompliance or deviations were identified.
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' DETAILS Persons Contacted The Toledo Edison Company (TECol
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- C. Daft, QA Director E. Doerr, Code Inspection Supervisor
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J. Singer, Associate QC Specialist
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Babcock and Wilcox Company (B&W)
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n, Group Leader ISI The Hartford Steam Inspection and Insurance Company T. Sanford, Authorized Nuclear Service Inspector (ANII)
The inspector also contactnd and interviewed other licensee and contractor
. employees.
- Denotes those present at the exit interview.
Functional or Program Areas Inspected 1.
General
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Ref: NRC Report No. 50-346/82-11(DETP) (Inservice Inspection)
The Eddy Current Examination (ET) consisted of a 3% random sample
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plus a 100% lane tube examinaticn in each steam generator (SG). The 3% random sample examination in each generator included a limited number of "special interest" tubes such as concentrations of " dings" at a particular elevation on cross sectional area or the abnormal ding findings. The "special interest" tubes were counted as part of
.the 3% random sample examination in accordance with guidelines set forth in the Davis-Besse 1 Technical Specification.
In addition, a special examination of approximately 48 tubes in front of the eight internal auxiliary feedwater header brackets / dowel pin locations in each SG were also selected for ET.
Visual examination (VT) of the tube to tube support plate interfaces and accessible internal auxiliary feedwater headcr bracket / dowel pin locations-were performed in the "A" and "B" SG's through the XI-axis, Upper Secondary Manway.
In SG "A", one tube was found to have a 69% thin wall by ET.
Because of the results an-additional 6% ET was performed of SG "A".
Tube lists for the ' additional 6% ET 'were developed as part of the pre-outage planning effort and were supplied to B&W along ~with the 3% tube list for use as required.
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2.
Procedure Review
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The inspector reviewed the following procedures:
B&W, Personnel Qualification - Eddy Current Examination, ISI-24,
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Revision 4.
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B&W, Ultrasonic Examination of Piping and Vessel Velds Joining
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Similar and Dissimilar Materials, ISI-120, Revision 12.
B&W, Insertion, Calibration, Operation and Removal of Eddy a
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Current OTSG Tube Examination Equipment in the Upper Head, ISI-406, Revision 4.
B&W, Multifrequency Eddy Current Examination of OTSG Tubing in
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177 Steam Generators, ISI-416, Revision 3.
No items of noncompliance or deviations were identified.
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3.
Equipment Certification and NDE Personnel Certifications The inspector reviewed eddy current equipment certifications and several B&W NDE personnel certifications, Level I, II and III, in accordance with SNT-TC'1A, 1975 Edition.
t No items of noncompliance or deviations were identified.
4.
Observation of Work Activities and Data Review
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The inspector observed ET on several A and B SG tubes.
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Multi-frequency ET equipment was used for examining both SG's.
Therefore, debris data was taken simultaneously on all tubes probed for defect data.
Data was also reviewed on the following systems:
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Service Water System
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Reactor Coolant Drain System
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Containment Spray System
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Low Pressure Injection System
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Decay Heat Removal System
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Steam Generator Secondary System
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Reactor Coolant System - Loop A
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Radwaste Coolant
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Makeup and Purification System
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No items of noncompliance or deviations were identified.
Exit-Interview The inspector met with C. Daft at the conclusion of the inspection. The
inspector summarized the scope and findings of the inspection noted in this report.
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