IR 05000445/1978021
| ML19263B371 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/11/1978 |
| From: | Crossman W, Tapia J, Renee Taylor NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | |
| Shared Package | |
| ML19263B368 | List: |
| References | |
| 50-445-78-21, 50-446-78-21, NUDOCS 7901180116 | |
| Download: ML19263B371 (5) | |
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U. S. flVCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT
REGION IV
Report No. 50-445/78-21; 50-446/78-21 Docket flo. 50-445; 50-446 Category A2 Licensee:
Texas Utilities Generating Company 2001 Bryan Tower Dallas, Texas 75201 Facility Name:
Comanche Peak, Units 1 & 2 Inspection at:
Comanche Peak Site, Glen Rose, Texas Inspection conducted:
November 20-22, 1978 Inspector:
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Reviewed:
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)rv R. G. Taylor, Resident Inspector, Projects Section Date e
Approved:
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/2////7B W. A. Crossman, Chief, Projects Section Date l2-Jf ?/
R. E. Hall, Chief, Engineering Support Section Date 2901180116
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Inspection Summary:
Inspection on flovember 20-22, 1978 (Report flo. 50-445/78-21; 50-446/78-21)
Areas Inspected:
Routine, unannounced inspection of construction activities including observation of work and review of quality assurance documentation related to concrete placement in the Unit 1 Safeguards Building; Auxiliary Feedwater and Safety Injection Pumps (Unit 1); and Containment Liner Plate (Unit 2). The inspection involved eighteen inspector-hours on site by one flRC inspector.
Results:
No items of noncompliance were identified in the three areas in-spected.
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DETAILS 1.
Persons Contacted Principal Licensee Personnel
- R. G. Tolson, TUGCO, Site QA Supervisor
- H. O. Kirkland, TUSI/B&R, Project General Manager
- J. George, TUSI, Project General Manager R. V. Fleck, TUGC0/G&H, Civil QC Supervisor
- J. V. Hawkins, TUGC0/G&H, Product Assurance Supervisor
- D. E. Deviney, TUSI, QA Technician G. Clancy, TUGCO, Nuclear Power Plant Technician Other Personnel M. Jeffers, Project Welding & QA Supervisor, Chicago Bridge & Iron (CB&I)
S. Wilson, Civil QC Inspector, Brown & Root (B&R)
P. Van Teslaar, Field Representative, Westinghouse M. Wuestefeld, Field Representative, Westinghouse
- denotes those present at the exit interview.
2.
Site Tour The IE inspector toured the various areas of the site to observe construction activities in progress, including housekeeping.
No items of noncompliance or deviations were identified.
3.
Concrete Placement
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The removal of improperly consolidated concrete in the slab at elevation 852 of the Unit 1 Safeguards Building was observed by the IE inspector.
The nonconforming material was documented in concrete placement Inspection Report No. 105-7852-004 as having been caused by the failure of the vibrators to penetrate deeper than four inches into the first lift of concrete.
Discussions with the Civil QC Supervisor indicated that a nonconformance report would be issued that would identify excessive congesbon of the reinforcing steel at the bottom of the slab and the use of three-quarter inch aggregate as factors which led to the inability of the vibrators to adequately consolidate the concrete.
In order to eliminate the possibility of recurrence, a concrete
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mix using a maximum aggregate size of three-eights of an inch was designed and qualified according to ACI 301-72, " Specifications for Structural Concrete for Buildings." The plot of compressive strength versus water-cement ratio for the trial mixtures was reviewed for conformance of the proportions selected with the field controls in use during placement fio. 105-8873-004.
Portions of this 260 cubic yard roof slab placement in the Unit 1 Safeguards Building were ob-served by the IE inspector.
Concrete placement techniques observed and field records of concrete temperature, air content, and slump were found to be in conformance with the requirements of Gibbs and Ilill Specification No. 2323-SS-9, Rev. 4, " Concrete," and the Con-crete Mix Proportion Data report.
fio items of noncompliance or deviations were identified.
4.
Containment Liner Plate, Unit 2 containment liner plate, rings twelve through seventeen, were released by CB&I to Brown & Root for the initiation of reinforcing steel placement during this inspection.
The record drawing for the twelf th and thirteenth rings, from azimuth 0 to 180 degrees, was reviewed by the IE inspector.
Two weld joints were randomly selected from the drawing and reviewed for satisfaction of the testing require-ments and for proper documentation of the welds with respect to welder identification and physical testing results. The Radiographic Exam-ination and the Vacuum Box Test reports for each weld were reviewed.
The Welders Qualification Test reports for the two welders involved were also reviewed. All items reviewed were found to be consistent and in accordance with Gibbs & Hill Specification fio. 2323-SS-14, Rev. 3, " Containment Steel Liners."
fio items of noncompliance or deviations were identified.
5.
Pumps Two motor driven and one turbine driven auxiliary feedwater pumps and one high pressure safety injection (HPSI) pump, of Unit 1, were inspected for proper in-place storage. The quality assurance docu-mentation packages were reviewed to verify compliance with the American Society of Mechanical Engineer's Boiler and Pressure Vessel Code,Section III requirements for design specification contents as delineated in paragraph fiA-3250 of Section III. The documents reviewed included Certificates of Compliance, Material Test Reports, Inspection Records, and the design specifications.
Inspection of the in-place equipment verified conformance with Brown & Root Construction Procedure flo. 35-1195-MCP-10, Rev. 2, " Storage and Storage Maintenance of Mechanical and Electrical Equipment."
No items of noncompliance or deviations were identified.
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Exit Interview The IE inspector met with licensee representatives (denoted in para-graph 1) and with Mr. R. G. Taylor, the flRC Resident Inspector, at the conclusion of the inspection on flovember 22, 1978, in order to discuss the purpose, scope and findings of the inspection.
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