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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8 M. R.
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Attachment:
Hydraulic Transients In Main Teed ater During Filling of Steam Generators ip a subsiaiary or itouston inaastries incorporaica
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Houston Lighting & Power Company
'ST-HL-AE-2483 File No.: G02 Page 2 Il cc:
I Regional Administrator, Region IV Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 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