ML19341D144
| ML19341D144 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 10/02/1980 |
| From: | Oprea G HOUSTON LIGHTING & POWER CO. |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| ST-HL-AE-555, NUDOCS 8103041035 | |
| Download: ML19341D144 (9) | |
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The Light Company m-n unngmer m %x nm m-n. Texas 77m m3msen October 2, 1980 ST-HL-AE-555 SFN:
V-0110 Mr. Karl Seyfrit
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Nuclear Regulatory Commission
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Dear Mr. Seyfrit:
s s South Texas Project Units 162 Docket Nos. STh 50-498, STN 50-499 Limited Restart of Safety Related Welding and Complex Concrete In order to verify the implementation of our corrective action taken relative to our stop work on complex safety related concrete and safety related AWS and AShE welding, we request that limited work be authorized be-ginning on October 6, 1980.
The specific work to be id.tiated for complex concrete, AWS and ASME welding are identified in the attachments to this letter.
Providing that we receive an authori:ation by October 6, 1980, we can commence the following schedule for this work:
AWS welding
- October 6, 1980 AS5E welding
- October 15, 1980 Complex concrete
- October 28, 1980 (first placement)
Relative to welding, we are committed to giving equal priority to the reexamination and repair of previous welds and to new producticn. As you know, we have committed to an extensive reexamination program of ASSE and AWS welding.
It is our plans to perform this work as quickly as possible and make the necessary repairs.
Since the public meeting we have developed detailed inspection plans, acceptance criteria and after providing for access it is our plans to proceed with the reexamination and repair using a combined inspector and welder team.
N04h1035
Houston Lighting & Power Company Mr. Karl Seyfrit
-ST-HL-AE-555 October 2, 1980 Page 2 We are ready to begin limited restart'of safety related complex concrete and safety related AWS and ASME welding because:
1.
Management systems and special' processes controlling these activities are established, 2.
Training of personnel has been completed, 3.
Adequate staffing exists to both perform and manage the work, and 4.
Corrective actions for previously identified non-compliances related directly to this work are j
essentially complete, as verified by recent NRC inspections.
i The work identified in this step will be the first of several steps in our efforts to eventually achieve full production on a normal basis.
Very truly yours, a
G. W. Oprea, Jr.
Executive Vice President GWO/cmd q
Attachments
. Houston Lighting & Power Cornpany
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- D. G. Barker Howard Pyle R. L. Waldrop H. R. Dean D. R. Beeth J. D. Parsons G. B. Painter
.L. K. English A: J. Granger R. A. Frazar i
H. S. Phillips (NRC) 1 J. O. Read (Read-Poland,Inc.)
M. D. Schwar2 (Baker & Botts)
R. Gordon Gooch
.(Baker & Botts)
J.-R. Newman (Lowenstein, Newman, Reis, Axelrad & Toll)
Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D.C.
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.- Houstori Lighting & Power Company M. L.'Borchelt Executive Vice President i
Central Power 6 Light Company P. O. Box 2121 Corpus Christi, Texas 78403
-R. L. Range-Central Power 6 Light Company P. O. Box 2121 Corpus Christi, Texas 78403 R. L. Hancock Director of Electrical Utilities City of Austin P. O. Box 1088
78767 T. H. Muehlenbeck
_ City of Austin P. O. Box 1088 Austin, Texas 7S767 J. B. Poston Assistant General Manager of Operations City Public Service Board P. O. Box 1771 San Antonio, Texas 78296 i
A. vonRosenberg c
i City Public Service Board
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P. O. Box 1771 l,
San Antonio, Texas 78296 I
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. Houston Lighting & Power Company Charles Bechoefer, Esquire Q airman, Atomic Safety 6 Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Dr. James C. Lamb, III 313 Woodhaven Road Chapel Hill, North Carolina 27S14 Dr. Emmeth A. Luebke Atomic Safety 6 Licensing Commission U. S. Nuclear Regulatory Commission Washington, D.-C.
20555 Steven A. Sinkin, Esquire 116 Villita Street San Antonio, Texas 78205 Citizens for Equitable Utilities e/o Ms. Peggy Buchorn
- Route 1, Box 432 Brazoria, Texas 77422 Richard W. Lowerre, Esquire Assistant Attorney General for the State of Texas P. O. Box 12548 Capitol Station Austin, Texas 78711 Bernard M. Bordenick Hearing Attorney Office of the Executive Legal Director U. S. Nuclear Regulatory Commission Washington, D. C. 20555
ATTPCIIMENT 1 SAFETY RELATED COMPLEX CONCRETE PLACEMENTS Pour Location Concrete Scheduled Scheduled
- umber Quantity Start Date Pour Date CI2-W24 Unit 2 Containment Internal - North Valve 230 Cu. Yds.
10/6/80 10/28/80 Room Walls and Secondary Shield Walls (EL. - 2' 0"
to
+ 9' 3")
C12-W22 Unit 2 Containment Internal - South lleat 170 Cu. Yds.
10/6/80 11/04/80 Exchange Walls and Secondary Shield Walls (EL. - 2' 0"
to + 9' 3")
CIl-S60A Unit 1 Containment Internal - North Valve 76 Cu. Yds.
10/13/80 31/18/80 Room Walls and Slab (EL. 61' 3"
to 68" 0")
CS2-W8 Unit 2 Containment Shell 580 Cu. Yds.
10/06/80 12/11/80 (EL. 53' 0"
to 63' 0")
CI2-W24B Unit 2 Containment Internal - North Valve 131 Cu. Yds.
10/27/80 12/02/80 Room Walls and Secondary Shield Walls (EL.
9' 3" to 16')
CI2-W22B Unit 2 Containment Internal - South lleat 115 Cu. Yds.
10/27/80 12/09/80 Exchange Walls and Secondary Shield Walls (EL.
9' 3" to 16')
CSI-W18 Unit 1 Containment Dome 431 Cu. Yds.
12/02/80 12/23/80 (EL. 150' 0"
to 155' 0")
i ATTACHMENT 2 CATEGORY l STRUCTURAL STEEL WELDING (SAFETY-RELATED AWS Dl.1 WELDING)
I.
RESTART OF PRODUCTION WELDING The restart of Category I (AWS Dl.1) Structural Steel Welding will begin with the approximately 200 cable tray supports at Elev.
35'-O' in Relay Room 202 of the Unit 1 Mechanical-Electrical Auxiliary Building.
II.
REEXAMINATION AND REPAIR WELDING The reexamination and repair of Category I (AWS Dl.1)
Structural Steel Welding will begin with the approxi-mately 20 cable tray supports that have been installed at Elev.
35'-O' in Relay Room 202 of the Unit 1 Mechanical-Electrical Auxiliary Building.
The continuation of this activity will be integrated into the overall project schedule, with the highest priority assigned to the existing welds in those areas where ongoing non-weldi.1g production work is currently scheduled.
III.
SCHEDULE The time required to reexamine and repair Category I Structural Steel Welding is estimated to be approxi-mately 12 months.
Assuming a start date of October 6, 1980, the program would be completed on October 15, 1981.
This time estimate is based on the following assumptions:
- 1) Using 3 teams.
Each team consisting of one inspector, one weld technician, two welders and two grinders on a full time basis.
- 2) Working a 40 hour4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> work week.
- 3) Estimated number of weld groups to be i
reexamined is 2350.
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ATTACHMENT 3 ASME CLASS 1, 2 and 3 PIPE WELDING I.
PRODUCTION WELDING RESTART Restart of ASME Pipe Welding will begin with the following:
A.
Pipe Spool Welding in the site fabrication shop.
B.
Component Cooling Water System in the Unit 1 Mechanical Electrical Auxiliary Building, Cube 3J (ASME Class 3, Carbon Steel, approxi-mately 35 butt welds).
II.
REEXAMINATION AND REPAIR WELDING A.
Non-ECW Pipe Welds Reexamination and repair of existing ASME Pipe Welding will be integrated into the overall project schedule.
Radiographs of the following ASME Class 2 welds show indications which require repair.
Repair welding will begin on these welds:
System Line No.
Weld No.
Containment Spray 1102 0001 Chemical + Volume Control 1099 0009 Chemical + Volume Control 1088 0012 Safety Injection 1101 0002 Safety Injection 1101 0005 Safety Injection 1101 0007 Repair welding on other ASME Class 1, 2 and 3 Systems will be coordinated with reexamination of the pipe welds.
B.
ECW Pipe Welds There are approximately 430 welds that have been completed in this system.
The reexamination and repair will begin with those welds which have not been backfilled.
A detailed plan will be developed and implemented to allow section-by-section excavation, reexamination, repair as required, and backfill of all other accessible welds in the system.
-ASME Class 1, 2 and 3 Pipe Welding Pace 2 of 2 III.
SCHEDULE A.
Non-ECW Pipe Welds The time required to reexamine and repair ASME Class 1, 2 and 3 butt welds, socket welds, and ASME Sub-section NF pipe support welds is estimated to be approximately 12 months.
Assuming a start date of October 15, 1980, the program would be completed on November 1, 1981.
This time estimate is based on the following assumptions:
J
- 1) Using one (1) inspection team (2 inspectors) to perfor.n all surface PT and visual examination.
- 2) Assigning two (2) welders full time to make all required repair welds.
- 3) Working a 40-hour week.
B.
ECW Pipe Welds The time required to reexamine, repair, and backfill the existing ECW Pipe Welds is es-timated to be approximately 12 to 18 months.
The time required is based on the following assumptions:
- 1) Using one (1) inspection team to perform all radiography.
- 2) Using one (1) inspection team (2 inspectors) to perform all surface PT and visual examina-t tions.
- 3) Assigning two (2) welders full time to make all required repair welds.
- 4) Working a 40-hour week.
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