IR 05000424/1986114
| ML20214P342 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 11/20/1986 |
| From: | Conlon T, Harris J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20214P327 | List: |
| References | |
| 50-424-86-114, 50-425-86-52, NUDOCS 8612040165 | |
| Download: ML20214P342 (6) | |
Text
9 UNITED STATES
>R 880,D
o NUCLEAR REGULATORY COMMISSION
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j 101 MARIETTA STREET.N.W.
- ATLANTA. GEORGI A 30323
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Report Nos.:
50-424/86-114 and 50-425/86-52 Licensee: Georgia Power Company P. O. Box 4545 Atlanta, GA 30302 Docket Nos.: 50-424 and 50-425 License Nos.: CPPR-108 and CPPR-109 Facility Name: Vogtle 1 and 2 Inspection Conducted:' Novembe 3-7, 1986 Inspecto C f/W4 74 -
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J. R. Harris I
Date Signed M
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/& fc-M Approved yv T. E. Conlon, Section Chief Date Signed Engineering Branch Division of Reactor Safety SUMMARY Scope: This routine, unannounced inspection was in the areas of post-tensioning activities, a licensee identified item,' and an employee concern in concrete.
Results: No violations or deviations were identified.
8612040165 861125 DR ADOCK 05000424 PDR
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REPORT DETAILS 1.
Persons Contacted Licensee Employees
- P. D. Rice, Vice President, Project Engineering
- E. D. Groover, QA Site Manager Construction
- G. A. McCarley, Project Compliance Coordination
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- 0. M. Fiquett, Unit 2 Construction Manager
- C. W. Hayes, Quality Assurance Manager J. Stanley, Civil Engineer Construction J. Hixon, Civil Engineer Construction Other licensee employees contacted included construction craftsmen, engineers, and technicians.
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Other Organization
- F. B. Marsh, Project Engineering Manager, Bechtel
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- J. W. Carson, QA Supervisor, Bechtel NRC Resident Inspectors
- J. Rogge, Senior Resident Inspector, Operations
- H. Livermore, Senior Resident Inspector, Construction
- Attended exit interview 2.
Exit Interview The inspection secpe and findings were summarized on November 7, 1986, with those persons indicated in paragraph 1 above.
The inspector described the areas' inspected and discussed in detail the inspection findings.
No dissenting comments were received from the licensee. The licensee did not identify as proprietary any of the materials provided to cr reviewed by the inspector during this inspection.
3.
Licensee Action on Previous Enforcement Matters This subject was not addressed in the inspection.
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Unresolved Items Unresolved items were not identified during the inspection.
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5.
Employee Concern, Discussion, and Finding (92705)
a.
Concern During the summer of 1983, the alleger indicated that in an area between the control building and turbine building he used a rock bit to drill holes one foot apart in an area approximately 20 feet by 100 feet in the floor where Tower Crane 2 was located. He indicated that after he drilled the holes he used a " concrete buster" to remove the concrete.
He indicated that while using the " concrete buster" it slipped and turned sideways hitting the north and south walls.
He indicated that he was concerned that this may have done some damage to the walls.
b.
Discussion The inspector discussed the use of " concrete busters" and rock bits with responsible engineers and craftsmen and examined the area in the control building where Tower Crane 2 was located and examined concrete slabs and walls in the control building.
Discussions with engineers and craftsmen disclosed that " concrete busters" used at the site are Jack Hammers, Rock Splitters and Ch4 ping Guns.
The Jack Hammer and Rock Splitter are hand-held pneumatic machines used to remove concrete and the chipping gun is a smaller versicn of the Jack Hammer which is used to roughen concrete surfaces for repair of defects.
Misuse of the Jack Hammer or Rock Splitter which resulted in the machine striking a wall or slab could cause some minor damage.
However, to cause any significant damage the machine would have to be deliberately held against the wall or slab for a significant length of time.
This would result in damage to the concrete such that the concrete would have to have been removed or repaired.
Examination of walls and slabs in the area of Tower Crane 2 and other areas in the control building disclosed no evidence of any damage to the concrete.
c.
Finding The inspector was unable to find any evidence of damage to walls and slabs in the control building that could have resulted from improper use of a " concrete buster."
If any damage did occur as a result of improper use of a " concrete buster," examination of the concrete indicated that it has either been replaced or repaired.
6.
Containment (Post-Tensioning) - Review o*f Quality Assurance Implementing Procedures (47061) Unit 2 The inspector examined QA-QC controls for post-tension activities.
Acceptance criteria appear in Sections 3.8 and 17 of the FSAR.
The following QA-QC controlling documents were examined by the inspecto *
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AX2AF04-100 Rev.14, Field Instruction Manual for Installation of USL
E5-55 Post-Tensioning System Within Nuclear Containment Structures Specification X2AF04 Rev. 3, Containment Post-Tensioning System
CD-T-28, Surveillance of Post-Tensioning Quality Control Inspections
Drawing 2X2AF04-37-7, Anchorage Details
Drawing 2X2AF04-45-0, Basemat Layout
Drawing 2X2AF04-53-6, Vertical Tendon Elevation Unit 2, Buttress
Numbers 1 to 2 Drawing 2X2AF04-54-5, Vertical Tendon Elevation - Unit 2, Buttress Numbers 2 to 3 Drawing 2X2AF04-55-7, Vertical Tendon Elevation Unit 2, Buttress
Numbers 3 to 1 Drawing 2X2AF04-56-5, Horizontal Tendon Elevation - Unit 2, Buttress Numbers 1 to 2 Drawing 2X2AF04-57-6, Horizontal Tendon Elevation Unit 2, Buttress
Numbers 2 to 3
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Drawing 2X2AF04-58-5, Horizontal Tendon Elevation Unit 2, Buttress Numbers 3 to 1 Drawing 2X2AF04-148-1, Vertical Tendon Stressing Data
Drawing AX2AF04-110-4, Grease Cap Details
Drawing AX2AF04-109-4, Tendon Grease Caps
Examination of the above documents indicated that FSAR requirements were being implemented in Site Specifications, procedures, and drawings.
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Within the areas examined, no violations were identified.
7.
Containment (Post-Tensioning) Observation Of Work (47063) - Unit 2 The inspector walked down the Unit 2 tendon gallery and examined vertical tendons that have been installed and observed ongoing pulling operations for six vertical tendons. Examination of completed work showed that two-thirds of the vertical tendons have been installed.
During this inspection, discussions with QC inspectors and responsible engineers disclosed that all of the horizontal tendons have been installed and that tendon operations are 76 percent complete on Unit 2.
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Inspection of work activities and discussions with QC inspectors and responsible engineers showed that post-tensioning activities were being performed in accordance with FSAR requirements and quality assurance implementing procedures drawings and specifications.
Within the areas inspected, no violations or deviations were identified.
8.
Containment (Post-Tensioning) Review Of Quality Records (47065) - Unit 2 The inspector examined quality records relating to post-tensioning activi-ties for the Unit 2 containment.
Acceptance criteria examined by the inspector appear in paragraph 6.
Records examined included tendon grease reports, receipt inspection records, and installation records for the following vertical and horizontal tendons:
VERTICAL TENDONS Tendon 18-94 Tendon 36-76 Tendon 55-131 Tendon 20-92 Tendon 39-147 Tendon 57-129 Tendon 22-90 Tendon 41-45 Tendon 59-127 Tendon 24-88 Tendon 43-143 Tendon 61-125 Tendon 24-86 Tendon 45-141 Tendon 63-123 Tendon 28-84 Tendon 47-139 Tendon 65-121 Tendon 30-82 Tendon 49-137 Tendon 67-119 Tendon 32-80 Tendon 51-135 Tendon 69-117 Tendon 34-78 Tendon 53-133 Tendon 71-115 HORIZONTAL TENDONS Tendon 1 Tendon 12 Tendon 20 Tendon 2 Tendon 13 Tendon 21 Tendon 3 Tendon 14 Tendon 22 Tendon 4 Tendon 15 Tendon 23 Tendon 8 Tendon 16-Tendon 24 Tendon 9 Tendon 17 Tendon 25 Tendon 10 Tendon 18 Tendon 26 Tendon 11 Tendon 19 Tendon 27 HORIZONTAL TENDONS Examination of records for the above tendons indicated that the tendons were being installed in accordance with specifications and drawing requirements and that the installations were being witnessed and documented by QC inspectors.
Within the areas inspected, no violations or deviations were identified.
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9.
Licensee Identified Items (92700)
(Closed) CDR84-61, Nuclear Service Cooling Water Tower Crossover Piping Backfill Location. During an engineering review of buried piping locations, initiated to evaluate various backfill placement techniques, safety-related.
Nuclear Service Cooling Water (NSCW) transfer discharge pipes (1202-036-6 and 1202-029-6) in Units 1 and 2 were found to be routed into a portion of Category I backfill that may be affected by the potential liquefaction of the adjacent in-situ sand stratum of in-situ soil. The subject piping for Unit I had been installed but not backfilled against. The piping for Unit 2 had not been installed.
Corrective actions included rerouting pipelines 1202-036-6 and 1202-029-6 into acceptable backfill areas and revising drawings to show acceptable areas. A review of the location routing of
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safety-related structures, buried piping and buried electrical duct banks was made to verify that the potential liquefaction of adjacent in-situ stratum will not affect their safety functions. This item is closed.
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