ML17298B934
| ML17298B934 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 01/31/1985 |
| From: | Knighton G Office of Nuclear Reactor Regulation |
| To: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| TAC-56680, NUDOCS 8503040515 | |
| Download: ML17298B934 (8) | |
Text
JAN31 S5 Docket Nos.:
50-528, 50-529 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 EJordan
~ oc et-i e 50=528/.5'/530 NRC PDR Local PDR NSIC PRC System LB¹3 Reading JLee EALicitra
- Attorney, OELD ACRS (16)
NGrace
Subject:
Request for Additional Information - Palo Verde Core Protection Calculator Software By letter dated December 2, 1984, you provided reports which describe software modifications to the, Palo Verde core protection calculator and the bases for the changes.
As a result of the staff's review of these reports, we have identified the need for additional information.
The specific information required is described in the enclosed request and has been discussed with members, of your staff.
We ask that you provide the required information so that the staff can complete its review of this matter.
r'*
rr If you have any questions regarding this letter, you should contact Mr. E. Licitra, the Licensing Project Manager.
rr lr Sincerely,
/gpss siB~
orisknG
~igh<on G ~,geN ~
George W. Knighton, Chief Licensing Branch No.
3 Division of Licensing
Enclosure:
As stated cc:
See next page DL:LB¹3 GWKnighton/yt 1/P)/85 DL' 1//I/85 850304 Oc~ 0~000M8 405iS 850i3i
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Pal o Verde Mr. E.
E.
Van Brunt, Jr.
Vice President
- Nuclear Pro,iects 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, Esq.
Southern California Edison Company P. 0.
Box 800
- Rosemead, California 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 Resident Inspector Palo Verde/NPS U.S. Nuclear Regulatory 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 Kenneth Ber 1 in, Esq.
Winston 5 Strawn Suite 500 2550 M Street, NW Washington, DC 20037 Ms. Lynne Bernabei Government Accountability Project of the Institute for Policy Studies 1901 gue Street, NW Washington, DC 20009 Ms. Jill Morrison 522 E. Colgate Tempi, Arizona 85238
o I
I 1
ENCLOSURE RE VEST FOR ADDITIONAL INFORMATION'EGARDING PVNGS CPC 1.
CEN-251(Y)-P, Revision 1, "PVNGS-1 Cycle 1
CPC and CEAC Data Base Listing", provides the values of flow constants associated with flow resistances through the core, pump line and steam generator, and curve fit coefficients for pump characteristics.
Those values are different from the values provided in Revision 0 of CEN-251(V)-P.
It is indicated that these values were amended to reflect design modifications to the reactor coolant pump.
Provide your analysis to show the correctness of the flow constants in the Revision 1 of CEN-251(V)-P.
2.
The values in Revision 1 of CEN-251(V)-P for the maximum DNBR and LPD (local power density) penalty factors, PF+XD and PFMAXL, and DNBR and LPD penalty factors for CEAC out of service, PFPRD and PFPRL are lower than those 1 isted in the Revision 0 ~
As indicated in E.E. VanBrunt's letter of December 3, 1984, the lower PF values reflect the action requirement in Action 6 of Table 3.3-1 of Technical Specification 3.3-1 where a power reduction of 15 percent is required within one hour of CEA misalignment with both CEACs out of service.
Provide your analysis to show that the PF reduction accompanied with the required power reduction provides adequate protection with respect to the DNB and fuel melt l'imits.
3.
The CEA inward deviation PFs listed in the Revision 1 of CEN-251(V)-P are 1.0.
The reduction of those PFs from the original values is in connection with the added restrictions in the approved Technical Specifications where CEA insertion limits are imposed in Technical
C'I l
Specifications 3.1.3.1 and 3.1.3.6 and a power reduction for CEA deviatio'n event is required per Figure 3.1.2.b.
A similar RF reduction has been approved for San Onofre Units 2 and 3.
During our review of the Palo Verde Technical Specifications, the staff was told that a plant specific analysis was performed in this regard.
Provide your analysis showing that the CEA insertion limits and power reduction specified in the Technical Specifications provide adequate pt'otection that the specified acceptable fuel design limits on DNBR and LPD will. not be violated using the reduced PFs.
4.
Provide a more detailed description with regard to the proposed EXECUTIVE changes for power'-up and CEAC display problems.
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