ML20039F412
| ML20039F412 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 01/08/1982 |
| From: | Goldberg J HOUSTON LIGHTING & POWER CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| ST-HL-AE-776, NUDOCS 8201120433 | |
| Download: ML20039F412 (2) | |
Text
f The Light Company n-,,,uem m a-nm,oo n-,,i.wm animn January 8,1982 ST-HL-AE-776 g,Wg g SFN: V-0530 Mr. Darrel G. Eisenhut p
,c,g;.3 O Division of Licensing
-9 Nuclear Regulatory Cormission T" w. 1 11g8?,;> Z.
3 Washington, D.C.
20555
- a,ma g sr.w neat u
Dear Mr. Eisenhut:
South Texas Project g
Units 1 & 2 Docket Nos. STN 50-498, STN 50-499 Large Break ECCS Analysis On December 22, 1981, HL&P received notification from Westinghouse Elec-tric Corporation that an error had been discovered in the large break ECCS analysis for the South Texas Project (STP). According to Westinghouse, a meeting was held with the NRC staff on December 17, 1981 to discuss this issue.
Westinghouse has detarmined that the single failure of emergency safe-guard equipment assumed in the large break ECCS analysis does not represent the most limiting assumption possible.
In fact, it has been detemined that it is more conservative to assume no failure in the emergency safeguards equipment for the ECCS analysis.
In the case of STP, Westinghouse has determined that this error results U
in a 19 F penalty in Peak Clad Temperature (PCT).
results indicate 144 F margin to the 10CFR50.46 ECCS acceptance criteria.
Since sufficient margin to the 10CFR50.46 limits is available, and no peaking assumptio0), the error was determined not to be a safety issue.
factor (F reduction is required due to the correction of the single failure It is HL&P's understanding that NRC concurred with Westinghouse on this detemination.
In the December 17, 1981 meeting with the NRC staff, Westinghouse agreed to request affected utilities to describe to the NRC how this problem affected theirunit(s).
This letter is intended to satisfy the above request.
If there are any questions, please contact Mr. Michael E. Powell at (713) 676-8592.
Very,t ul yours, t c' s
v.
Of y
J.c). Gol erg Vice President Nuclear Engineering and Construction McB/blt f00I 8201120134 4' O
')
lious:on Lighting & l'ower Com]uny cc:
G. W. Oprea, Jr.
January 8, 1982 J. H. Goldberg ST-HL-AE-776 J. G. Dewease SFN: C-0530 J. D. Parsons Page 2 D. G. Barker C. G. Robertson R. A. Frazar J. W. Williams J. W. Briskin J. E. Geiger S. M. Dew J. T. Collins (NRC)
D. E. Sells (NRC)
H. S. Phillips (NRC)
M. D. Schwarz (Baker & Botts)
R. Gordon Gooch (Baker & Botts)
J. R. Newman (Lowenstein, Newman, Reis, & Axelrac)
STP RMS Director, Office of Inspection & Enforcement Nuclear Regulatory Commission Washington, D. C. 20555 R. L. Range /G. W. Muench Charles Bechhoefer, Esquire Central Power & Light Company Chairman, Atomic Safety & Licensing Board P. O. Box 2121 U. S. Nuclear Regulatory Commission Corpus Christi, Texas 78403 Washington, D. C.
20555 R. L. Hancock/G. Pokorny Dr. James C. Lamb, III City of Austin 313 Woodhaven Road P. O. Box 1088 Chapel Hill, North Carolina 27514 Austin, Texas 78/67 J. B. Poston/A. vonRosenberg Mr. Ernest E. Hill City Public Service Board Lawrence Livermore Laboratory P. O. Box 1771 University of California San Antonio, Texas 78296 P. O. Box 808, L-46 Livermore, California 94550 Brian E. Berwick, Esquire William S. Jordan, III Assistant Attorney General Harnon & Weiss for the State of Texas 1725 I Street, N. W.
P. O. Box 12548 Suite 506 Capitol Station Washington, D. C.
20006 Austin, Texas 78711 Lanny Sinkin Citizens for Equitable Utilities, Inc.
Citizens Concerned About Nuclear Power c/o Ms. Peggy Buchorn 5106 Casa Oro Route 1, Box 1684 San Antonio, Texas 78233 Brazoria, Texas 77422 Jay Gutierrez, Esquire Hearing Attorney Office of the Executive Legal Director U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Revision Date 12-23-81