ST-HL-AE-2483, Forwards Hydraulic Transient in Main Feedwater During Filling of Steam Generators, Describing Events,Causes & Corrective Actions.Confirmatory Testing Will Be Completed Prior to Entry Into Mode 3
| ML20148F965 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 01/18/1988 |
| From: | Wisenburg M HOUSTON LIGHTING & POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| Shared Package | |
| ML20148F969 | List: |
| References | |
| ST-HL-AE-2483, NUDOCS 8801260368 | |
| Download: ML20148F965 (2) | |
Text
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A The Light company P.O. I ox 1700 llouston, Texas 77001 (713) 228 9211 llouston Lighting & Power -
January 18, 1988 ST HL AE-2483 p File No.: C02 7 10CFR50 U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 l
South Texas Project Electric Generating Station Unit 1 Docket No. STN 50-498 Main Feedwater Hydraulic Transients The attached report describes hydraulic transient events which have occurred in the South Texas Project Unit 1 mai. feedwater system during filling of steam generators; the root causes of the events; and the corrective actions undertaken by HL&P to eliminate the causes of the events.
The hydraulic transient events were a direct result of feeding steam generators with feedwater at a temperature higher than the saturation temperature corresponding to the steam generator pressure. Corrective actions are being taken prior to entry into Mode 3 to procedurally ensure that operations of this type are prevented. This will entail restricting usage of main feedwater as a source of feedwater when the system pressure and temperature conditions would result in en t base flow.
Confirmatory testing will be comple :i y to entry into Mode 3.
Following completion of this confirmato -ing, IIIAP will issue a supplement to this report to document ' :c t. Its.
These events are not related to t e Auxiliary Feedwater System hydraulic transients that occurred in . An r+ mber 1987.
If you should have any questions on ,an e, please contact Mark McDurnett at (512) 972-8530.
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O r,enbur M. R.
Mar.agc[r Eng eerin and Licensing MAM/j kk
Attachment:
Hydraulic Transients In Main Teed ater During Filling of Steam Generators a subsiaiary or itouston inaastries incorporaica ip
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I~ Houston Lighting & Power Company
'ST-HL-AE-2483 File No.: G02 Page 2 l
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Regional Administrator, Region IV Nuclear Regulatory Commission l 611 Ryan Plaza Drive, Suite 1000 l Arlington, TX 76011 '
N. Prasad Kadambi, Project Manager U. S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, MD 20814 ,
Dan R. Carpenter Senior Resident Inspector / Operations-c/o U. S. Nuclear Regulatory Commission P. O. Box 910 '
Bay City, TX 77414 J. R. Newman, Esquire Newman & Holtzinger, P.C.
1615 L Street, N.W.
Washington, DC 20036 R. L. Range /R. P. Verret Central Power & Light Company l
.P. O. Box 2121 Corpus Christi, TX 78403 R. John Miner- (2 copies)
Chief Operating Officer City of Austin Electric Utility 721 Barton Springs Road Austin, TX 78704 R. J. Costello/M.T. Hardt City Public Service Board P. O. Box 1771 San Antonio, TX 78296 Rufus S. Scott Associate General Counsel Houston Lighting & Power Company P. O. Box 1700 Houston, TX 77001 Revised 11/20/87 L3/CK/NRC