ML20009E413
| ML20009E413 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 07/02/1981 |
| From: | Oprea G HOUSTON LIGHTING & POWER CO. |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, ST-HL-AE-686, ST-HL-AE-686E, NUDOCS 8107280175 | |
| Download: ML20009E413 (3) | |
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Mr. Karl Seyfrit oi Uirector, Region IV Q k "1 [$
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Dear Mr. Seyfrit:
South Texas Project Units 1&2 Docket Nos. STN 50-498, STN 50-499 Final Report on the Containment Gas Analysis System Overpressurization By letter dated.1"ne 6, 1980, pursuant to 10CFR50.55(e), Houston Lighting &
Power Company (HL&P) submitted to your office an interim report concerning the design of the containment gas analysis system supplied by Consip, Inc.
In addition, this concern had been communicated to the NRC by Comsip, Inc. on April
- 3. 1980 pursuant to 10CFR21.
Repairs to the containment gas analysis systems have been completed utilizing repair kits furnished by Comsip.
The Final Report on this natter is attached.
Very t sly yours,
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Exec %tive / ice President SSR/anj Attachments
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P107280175 810702 DR ADOCK 05000
r e-Ilouston Lighting & Power Company cc:
J. H. Goldberg July 2, 1981
- 0. G. Barker ST-HL-AE-686 C. G. Robertson SFN: V-0530 Howard Pyle Page 2 R. L. Waldrop H. R. Dean D. R. Beeth J. D. Parsons J. W. Williams J. W. Briskin R. A. Frazar STP RMS H. S. Phillips (NRC)
J. O. Read (Read-Poland,Inc.)
M. D. Schwarz (Baker & Botts)
R. Gordon Gooch (Baker & Botts)
J. R. Newman (Lowenstein,Newman,Reis,&Axelrad)
Director, Office of Inspection & Enforcement Nuclear Reg"latory Commission Washington, D. C. 20555 M. L. Borchelt Charles Bechhoefer, Esquire President Chairman, Atomic Safety & Licensing Board Central Power & Light Company U. S. Nuclear Regulatory Commission P. O. Box 2121 Washington, D. C.
20555 Corpus Christi, Texas 78403 R. L. Range Dr. James C. Lamb, III Central Power & Light 313 Woodhaven Road P. O. Box 2121 Chapel Hill, North Carolina 27514 Corpus Christi, Texas 78403 R. L. Hancock Mr. Ernest E. Hill Director of Electrical Utilities Lawrence Livermore Laboratory City of Austin University of California P. O. Box 1088 P. O. Box 808, L-123 Austin, Texas 78767 Livernore, California 94550 T. H. Muehlenbeck William S. Jordan, III City of Austin Harmon & Weiss P. O. Box 1088 1725 I Street, N. W.
Austin, Texas-78767 Suite 506 Washington, D. C.
20006
- d. B. Poston Lanny Sinkin Assistant General Manager of Operations Citizens Concerned About Nuclear Power City Public Service Board 5106 Casa Oro P. O. Box 1771 San Antonio, Texas 78233 San Antonio, Texas 78296 A. vonRosenberg Citizens for Equitable Utilities, Inc.
City Public Service Board c/o Ms. Peggy Buchorn P. O. Box 1771 Route 1, Box 1684
' San Antonio, Texas 78296 Brazoria, Texas 77422 Brian E. Berwick, Esquire Jay Gutierrez, Esquire Assistant Attorney for the State of Texas Hearing Attorney P. O. Box.12548
" ice of the Executive Legal Director Capitol Station
FINAL REPudT CONTAINMF.NT GAS ANALYSIS SYSTEM OVERPRESSURIZATION July 2, 1981 DESCRI.' TION OF THE INCIDENT By letter dated April 3,1980 Comsip, Inc. notified the NRC paoinn V office of a concern pursuant to 10CFR21.
The concern relates to
...a design of the containment gas analysis system such that the system could be rendered inoperable under certain conditions.
Please refer to the Comsip letter for a detailed description.
CORRECTIVE ACTION Comsip has provided a modification kit as discussed in their April 3, 1980 letter to the NRC Region V office to alleviate the defect. This kit is comprised of a pump recirculation line, with a check valve, between the pump discharge and suction lines. These kits have been installed in the containment gas analysis systems at the STP site.
SAFETY ANALYSIS This deficiency could have impaired the. ability to perform hydrogen monitoring, which is required for post-accident operation. An additional concern was breaching the integrity of the containment gas analysis system.
The corrective action taken eliminates these concerns.
Additional detail concerning the safety evaluation is provided in Comsip's April 3,1980 letter to the NRC Region V office.
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