ML20209G910
| ML20209G910 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 04/28/1987 |
| From: | Wisenburg M HOUSTON LIGHTING & POWER CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| Shared Package | |
| ML19292H178 | List: |
| References | |
| ST-HL-AE-2123, NUDOCS 8705010095 | |
| Download: ML20209G910 (4) | |
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'I'he Light COM My riousion i.iybiinx & rowe, e.o. Hox ivoo riousion. icxa, mooi (7i3>22s.92ii April 28, 1987 ST-HL-AE-2123 File No.: G9.10 10CFR50, Appendix A U. S. Nuclear Regulatory Commission Attention:
Document Control Desk Washington, DC 20555 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Alternative Pipe Break Criteria - Pressurizer Surge Line
References:
(1) HL&P letter to NRC, J. H. Goldberg to H. R. Denton, March 12, 1986, ST-HL-AE-1617 (2) NRC letter to HL&P, N. P. Kadambi to J. H. Goldberg, July 10, 1986, ST-AE-HL-90935 (3) llL&P letter to NRC, M. R. Wisenburg to V. S. Noonan, September 15, 1986, ST-HL-AE-1737 (4) HL&P letter to NRC, M. R. Wisenburg to V. S. Noonan, November 24, 1986, ST-HL-AE-1823 (5) NRC letter to HL&P, N. P. Kadambi to J. H. Goldberg, March 31, 1987, ST-AE-HL-91219 By letter dated March 12,1986 (reference 1), Houston Lighting & Power Company (HL&P) provided the technical basis for the elimination of postulated pipe ruptures in the pressurizer surge line, and requested an exemption to the requirements of 10CFR50, Appendix A GDC-4 for treatment of postulated surge line breaks. The NRC staff reviewed the information contained in our March 12, 1986 submittal and submitted a request for additional information (reference 2).
In response to the NRC request for additional information, llL&P provided the technical information in reference 3.
A meeting was held with the NRC on October 1, 1986 to review the reference 3 information. At that meeting, the NRC staff had additional questions which were addressed in a subsequent meeting which was held with the NRC on October 15, 1986.
By letter dated November 24, 1986 (reference 4), HL&P provided answers to all questions raised as of that date.
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ST-HL-AE-2123 Fils No.: G9.10 11ouston Lighting & Power Company Page 2 A request for additional information on CDC-4 exemption request was received from the NRC staff via reference 5.
A meeting was held with the NRC on April 16, 1987 to review the reference 5 information.
The purpose of this submittal is to docket information discussed during the April 16, 1987 meeting.
Question number 8 of reference 5 is related to discussion of the leakage detection system (s) at South Texas and operating experience at Westinghouse plants. Attachment 1 to this letter provides a detailed discussion of leakage detection system (s) at South Texas. At the April 16, 1987 meeting the staff also requested information on administrative procedures at STP relative to increases in sump leakage measurements.
Station procedure 1 POP 04-RC-0003 Rev. 1 dated December 2, 1986 provides symptoms and actions for excessive RCS leakage. One of ten (10) symptoms listed is containment normal sump level increasing and or flow totalizer showing an increase. Automatic and/or immediate actions are (1) possible containment ventilation isolation (2) verify pressurizer level and (3) start additional charging pumps as necessary.
Supplementary actions listed include the following:
a)
If leakage is into containment atmosphere as indicated by leak detection systems, ISOLATE If possible and notify Health and Safety Services of RCS leakage and location.
b)
If leakage is not into containment atmosphere, LOCATE and ISOLATE where applicable.
c)
NOTIFY Health and Safety Services Of RCS leakage and location.
d)
Determine the RCS leakage rate by performing RCS inventory.
e)
If leakage rate is greater than that specified in Technical Specification 3.4.6.2 follow appropriate action statement.
Because Attachment 1 contains information proprietary to Westinghouse Electric Corporation, the attached affidavit signed by Westinghouse management sets forth the basis on which the information may be withheld from public disclosure by the NRC in accordance with the requirements of 10CFR2.790(b)(1).
This affidavit addresses with specificity the considerations of 10CFR2.790(b)(4). Correspondence with respect to the proprietary aspects of the affidavit and Application for Withholding of Attachment 1 should reference l
CAW-87-036 and should be addressed to R. A. Wiesemann, Manager Regulatory and l
Legislature Affairs, Westinghouse Electric Corporation, P. O. Box 355, l
Pittsburgh, Pennsylvania 15230.
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If you should have any questions on this matter, please contact Mr.
M. E. Powell at (713) 993-1328.
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Attachments:
(1)' "NRC Request for Additional Information in Support of the Elimination of Postulated Pipe Ruptures in the Pressurizer Surgeline of South Texas Project Units 1 & 2,"
Westinghouse Proprietary Class 2, April 1987.
Also enclosed is a Westinghouse authorization letter, CAW-87-036. Proprietary Information Notice, and accompanying Affidavit, i
(2)
"NRC Request for Additional Information in Support of the Elimination of Postulated Pipe Ruptures in the Pressurizer Surgeline of South Texas Project Units 1 and 2,"
Westinghouse Proprietary Class 3, April 1987.
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d ST-HL-AE-2123 File No.: G9.10 Nouston Lighting & Power Company Page 4 cc:
Regional Administrator, Region IV M.B. Lee /J.E. Malaski Nuclear Regulatory Commission.
City of Austin 611 Ryan Plaza Drive, Suite 1000 P.O. Box 1088 Arlington, TX -76011 Austin, TX 78767-8814 (0) N. Prasad Radambi, Project Manager A. von Rosenberg/M.T. Hardt i
U.S. Nuclear Regulatory Commission City Public Service Board 7920 Norfolk Avenue P.O. Box 1771 i
Bethesda, MD 20814 San Antonio, TX 78296
-(0) Robert L. Perch, Project Manager Advisory Committee on Reactor Safeguards U.S. Nuclear Regulatory Commission U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue 1717 H Street
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Bethesda, MD 20814 Washington, DC 20555 i
Dan R. Carpenter Senior Resident Inspector / Operations c/o U.S. Nuclear Regulatory i
Commission P.O. Box 910 Bay City, TX 77414 i
Claude E. Johnson l
Senior Resident Inspector / Construction i
c/o U.S. Nuclear Regulatory Commission l
P.O. Box 910 Bay City, TX 77414 1
M.D. Schwarz, Jr., Esquire Baker & Botts l
One Shell Plaza Houston, TX 77002 J.R. Newman, Esquire Newman & Holtzinger, P.C.
j 1615 L Street, N.W.
Washington, DC 20036 i
T.V. Shockley/R.L. Range Central Power & Light Company l
P. O. Box 2121 l
Corpus Christi, TX 78403
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- Includes Attachments 1 & 2.
All others without attachments.
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L1/NRC/1w Revised 2/3/87 i
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