ML17298B980
| ML17298B980 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/12/1985 |
| From: | Knighton G Office of Nuclear Reactor Regulation |
| To: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| NUDOCS 8503250189 | |
| Download: ML17298B980 (8) | |
Text
]g85 Docket Nos.:
50-528, 50-529 and 50-530 Mr. E.
E.
Van Brunt, Jr.
Vice President - Nuclear Projects Arizona Public Service Company Post Office Box 21666 Phoenix, Arizona 85036
Dear Mr. Van Brunt:
DISTRIBUTION 0:525/52~5/550 NRC PDR LPDR EJordan NSIC ACRS (16)
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- Attorney, OELD JPartlow BGrimes
Subject:
Request for Additional Information - Palo Verde Safety Valves Based on the staff's review of the changes made to the primary and secondary valves for Palo Verde, as discussed in your transmittal, dated December 18,
- 1984, we have determined that additional information is required to complete our review.
The specific information required is identified in the enclosed request and has been discussed with members of your staff.
We ask that you provide responses to the enclosed request for information within two weeks of receipt of this letter.
If you have any questions regarding this letter, you should contact Mr. E. Licitra, the Licensing Project Manager.
Sincerely,
Enclosure:
As stated cc:
See next page George W. Knighton, Chief Licensing Branch No.
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Palo Verde Mr. E.
E.
Van Brunt, Jr.
Vice President
- Nuclear Projects Arizona Public Service Company P. 0.
Box 21666 Phoenix, Arizona 85036 Arthur C. Gehr, Esq.
Snell 5 Wilmer 3100 Valley Center Phoenix, Arizona 85073 Mr. James M. Flenner, Chief Counsel Arizona Corporation Commission 1200 West Washington Phoenix, Arizona 85007 Charles R. Kocher, Esq. Assistant Counsel James A. Boeletto, Eso.
Southern California Edison Company P. 0.
Box 800
- Rosemead, Cali fornia 91770 Ms. Margaret Walker Deputy Director of Energy Programs Economic Planning and Development Office 1700 West Washington Phoenix, Arizona 85007 Mr. Rand L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 Kenneth Berlin, Esq.
Winston 8 Strawn Suite 500 2550 M Street, NW Washington, DC 20037 Ms. Lynne Bernabei Government Accountability Project of the Institute for Policy Studies 1901
(}ue Street, NW Washington, DC 20009 Ms. Jill Morrison 522 E. Colgate Tempi, Arizona 85238 Resident Inspector Palo Verde/NPS U.S. Nuclear Requlatorv Commission P. 0.
Box 21324 Phoenix, Arizona 85001 Ms. Patricia Lee Hourihan 6413 S. 26th Street Phoenix, Arizona 85040 Regional Administrator - Region V
U. S. Nuclear Regulatory Commission 1450 Maria Lane Suite 210 Walnut Creek, California 94596
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ENCLOSURE PALO VERDE UNITS 1, 2
AND 3 REQUEST FOR ADDITIONAL INFORMATION 1.
Discuss the overall effects of Palo Verde plant specific changes (e.g, AFMS, HPSI, LPSI, primary and secondary safety valve parameters) on the results of the loss of load analyses documented in the CE Topical Report CEN-227.
2.
Page 5A-4 of CESSAR FSAR Amendment 9 indicates that the pressurizer safety valve nozzle elevation is at 107X pressurizer level.
Appendix C-1 of CEN-227 indicates that the nozzle elevation is at 100K pressurizer level.
Explain the above discrepancy.
3.
Both CESSAR FSAR Amendment 9 and CEN-227 indicate that the pressurizer water level reaches a maximum value of 98K during a loss of load transient with 20K primary safety valve blowdown.
This pressurizer water level is close to the safety valve nozzle elevation.
Provide a discussion of the possible water carryover to the safety valves and its consequences.
Specifically, discuss if water carryover will or will not occur for this (or any other) event.
If it will occur, please confirm that the safety valves are designed and certified for two-phase flow relief. If not, please discuss,why you consider the safety valve design in compliance with GDC-1.
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4.
A postulated FMLB may lead to the most limiting transient of RCS tempera-ture and pressurizer water level.
Provide the results of an FMLB analysis using Palo Verde. plant specific parameters (e.g.,
AFWS, HPSI,
- LPSI, Primary and Secondary Safety Valves).
Provide the transient curve to show the temporal behavior of pressurizer water level, RCS subcooling margin, RCS pressure and DNBR.
5.
Provide the results of an evaluation with regard to the overall effects of all eve'nts analyzed in Chapter 15 of the FSAR.
Incorporate the changes made in Palo Verde plant on AFM, HPSI, LPSI, Primary and Secondary Safety Valves.
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