ML20040C992
| ML20040C992 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/22/1982 |
| From: | Gatchell C TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | |
| Shared Package | |
| ML20040C961 | List: |
| References | |
| NUDOCS 8201290449 | |
| Download: ML20040C992 (4) | |
Text
UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of
)
)
TEXAS UTILITIES GENERATING
)
Docket Nos. 50-445 COMPANY, et al.
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50-446
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(Comanche Peak Steam Electric
)
( Application for Station, Units 1 and 2)
)
Operating Licenses)
AFFIDAVIT OF C. H. GATCHELL REGARDING CONTENTION SEVEN (ROCK OVERBREAK) 1 Charles H. Gatchell, being first duly sworn, do depose 2
and state:
I was employed by Texas Utilities Services, Inc. in the position of Resident Manager from July 16, 1973 to June 16, 1977.
During that time, I was responsible for assuring that all concrete p1acements for seismic Category I structure foundations were done in accordance with the required specifications and procedures. My educational and professional qualifications are attached to this Affidavit.
This Affidavit addresses whether, during my tenure as Resident manager, any loose rock and other foreign material were thrown into the excavation site prior to or during the p1acement of concrete.
It will also address whether any corrective action had to be taken as a result of loose rock, foreign materials and voids.
.I 8201290449 820126 PDR ADOCK 05000445
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4 Based on my personal observation and my examination of all of the applicable pour cards, nonconformance reports and other documents as appropriate, I can attest to the fact that there were no instances in which loose rocks or other foreign materials were thrown into the site before concrete placements began for foundations of seismic Category I structures.
Further, with the exception of the four incidents below, I can attest to the fact that all concrete placements (including those necessary to repair incidents of rock-overbreak) were done in accordance with all applicable specifications and procedures.
There were two instances in which during or after concrete pours foreign material was found in seismic Category I foundations.
First, a chainfall was imbedded in the Unit I base mat. The increased mat stresses resulting from the chainfall were found to be negligible and for that reason no repairs were required.
In addition, two wood spreaders used to maintain form to steel clearance were left 17 a placement at the 797' elevation.
The spreaders were removed by drilling and chipping and the cavity repaired.
Two incidents of voiding were also reported. Visual inspection indicated the presence of voids under both sumps in the 4
Unit I containment base mat. The average void space was 3/8" with a maximum void of 5/8".
To repair these voids, they were filled with a neat cement grout placed under low pressure.
In addition, concrete was not properly worked around one of the valve embedments.
As a result, a void was evident under the embedment. The void was filled in with concrete.
Based on (Report on Unit 1 Containment Mat Evaluation, G8H, June 18, 1976), I concluded that there are no foreign material, loose rock and/or voids in the foundations of seismic Category I structures which will have an effect on the static, dynamic and engineering proporties of those structures.
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Charles H. GatcrypVI po-Subscribed and sworn to before me this,02 day of January 1982.
0-f./dL lL '
'Ndtary
CHARLES H. GATCHELL STATEMENT OF EDUCATIONAL AND PROFESSIONAL QUALIFICATIONS POSITION:
Senior Engineer, TUSI Technical Services FORMAL EDUCATION:
BS in Civil Engineering, Bucknell University, Lewisburg, PA, 1949 EXPERIENCE:
1980 - Present Texas Utilities Technical Services.
Estimating, planning & scheduling control systems for future TUSI steam generating plants 1977 - 1980 Texas Utilities Services Inc. as Assistant to Manager of ConstructWn.
Performed administrative work for the Company's construction program.
1973 - 1977 Texas Utilities Services Inc. as Resident Manager responsible for representing Owners during planning and early phases of construction at Comanche Peak nuclear steam electric station.
1970 - 1973 Texas Utilities Services Inc. as Resident Engineer during construction of a lignite burning steam electric station at Mt. Pleasant, Texas.
Assistant to Resident Manager.
Responsible for civil work.
1967 - 1970 Ebasco Services Inc. New York, NY.
Resident Engineer on two construction management type contracts for gas burning steam electric generating plants in Dallas.
Assistant to General Superintendent.
1961 - 1967 Texas Highway Department as Resident Engineer at Monahans, Texas responsible for overseeing construction of state and interstate highways in the area.
1952 - 1961 Ebasco Services Inc. New York, NY as Construction Engineer in various capacities during construction of steam electric generating plants at Rockdale, Texas, Fort Worth, Texas, Monahans, Texas, Colorado City, Texas, Graham, Texas.
1951 - 1952 Recalled to USMC.
Honorable discharge as 1st Lt.
1949 - 1951 Ebasco Services Inc. New York, NY as Inspector on construction of a coal burning steam electric generating plant, Sunburg, PA.