ML17312B740
| ML17312B740 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 10/23/1997 |
| From: | Thomas K NRC (Affiliation Not Assigned) |
| To: | James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| TAC-M83654, TAC-M83655, TAC-M83656, NUDOCS 9711040195 | |
| Download: ML17312B740 (10) | |
Text
t Mr. James H. Levine Executive Vice President, Nuclear Arizona Public Service Company Post Office Box 53999
- Phoenix, Arizona 85072-3999 October 23, 1 997
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING INDIVIDUALPLANT EXAMINATION OF EXTERNAL EVENTS SUBMITTAL FOR THE PALO VERDE NUCLEAR GENERATING STATION (TAC NOS.
M83654.
H83655 AND H83656)
Dear Hr. Levine:
Based on the Nuclear Regulatory Commission's ongoing review of the Palo Verde Nuclear Generating Station, Units 1, 2, and 3 Individual Plant Examination of External Events (IPEEE) submittal, the staff has determined that the additional information described in the enclosure is needed to complete the review.
The information needed is related to the fire analyses in the IPEEE.
No further information is needed pertaining to seismic or high wind, flood and other external events (HFO) areas.
To assist the staff in meeting its review schedule.
please respond to this request in writing within 60 days from receipt of this letter.
If you have any questions, please contact me at (301) 415-1362.
Sincerely, ORIGINAL SIGNED BY Kristine M. Thomas, Project Manager Project Directorate IV-2 Division of Reactor Projects
- III/IV Office of Nuclear Reactor Regulation Docket Nos.
STN 50-528, STN 50-529 and STN 50-530
Enclosure:
Request for Additional Information cc w/encl:
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 October 23, 1997 1Mr. James M. Levine Executive Vice President.
Nuclear Arizona Public Service Company Post Office Box 53999
- Phoenix, Arizona 85072-3999
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING INDIVIDUALPLANT EXAMINATION OF EXTERNAL EVENTS'SUBMITTAL FOR THE PALO VERDE NUCLEAR GENERATING STATION (TAC NOS.
- M83654, M83655 AND M83656)
Dear Mr. Levine:
Based on the Nuclear Regulatory Commission's ongoing review of the Palo Verde Nuclear Generating Station, Units 1, 2, and 3 Individual Plant Examination of External Events (IPEEE) submittal, the staff has determined that the additional information described in the enclosure is needed to complete the review.
The information needed is related to, the fire analyses in the IPEEE.
No further information is needed pertaining to seismic or high wind, flood and other external events (HFO) areas.
To assist the staff in meeting its review schedule, please respond to this request in writing within 60 days from receipt of this letter.
If you have any questions, please contact me at (301) 415-1362.
Sincerely, Docket Nos.
STN 50-528, STN 50-529 and STN 50-530
Enclosure:
Request for Additional Information cc w/encl:
See next page 4
d4 Kristine M. Thomas, Project Manager Project Directorate IV-2 Division of Reactor Projects
- III/IV Office of Nuclear Reactor Regulation
, Iil
Mr. James M. Levine CC:
Mr. Steve Olea Arizona Corporation Commission 1200 W. Washington Street
- Phoenix, Arizona 85007 Douglas Kent Porter Senior Counsel Southern California Edison Company Law Department, Generation Resources P.O.
Box 800.
Rosemead.
California 91770 Senior Resident Inspector USNRC P. 0.
Box 40 Buckeye,,Arizona 85326 Regional Administrator, Region IV U. S.
Nuclear Regulatory Commission Harris Tower
& Payillion 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064
- Chairman, Board of Supervisors ATTN:
Chairman 301'W. Jefferson, 10th Floor
- Phoenix, Arizona 85003 Mr.'Aubrey V. Godwin, Director Arizona Radiation Regulatory Agency 4814 South 40 Street Phoenix, Arizona.
85040 Ms. Angela K. Krainik, Manager Nuclear Licensing Arizona Public Service Company P.O.
Box 52034
- Phoenix, Arizona 85072-2034 Mr. John C. Horne.
Vice President Power Supply Palo Verde Services 2025 N. Third Street, Suite 220
. Phoenix.
Arizona 85004 Mr. Robert Burt Los Angeles Department of Water
& Power Southern California Public Power Authority ill North Hope Street, Room 1255-B Los Angeles. California 90051 Mr. David Summers Public Service Company of New Mexico 414 Silver SW, f0604 Albuquerque.
New Mexico 87102 Mr. Robert D. Bledsoe Southern California Edison Company 14300 Mesa
- Road, Drop D41-SONGS San Clemente, California 92672 Mr.. Robert Henry Salt River Project 6504 East Thomas Road Scottsdale, Arizona 85251 Terry Bassham, Esq.
General Counsel El Paso Electric Company 123 W. Mills El Paso.
Texas 79901
Enclosure REQUEST FOR ADDITIONAL INFORMATION PALO VERDE NUCLEAR GENERATING STATION INDIVIDUALPLANT EXAMINATION OF EXTERNAL EVENTS Fire 1.
The submittal addr esses both human inter vention and non-inter vention aspects of the spurious recirculation actuation signal (RAS) scenario.
More detail is needed on this issue as discussed below.
Provide a description of the cable routing carrying the signals contributing to spurious RAS.
Identify each compartment and within each compartment.
describe the cabling geometry (i. e..
number of trays, elevation, orientation, and separation from each other and walls, floors, and ceiling).
Identify fire sources potentially impacting these cables.
Identify the thermal damage criteria used for these cables.
If Thermo-Lag is used on these
- cables, describe how it was credited in the analysis.
Provide an assessment of the operator diagnoses of spurious RAS.
How are spurious signals distinguished from real signals?
Are there independent instrumentation systems available to help diagnose this situations and can that cabling be involved in the same fire?
What is the cause of the spurious signal generated?
(Short to ground?
Open circuit cable?) If the operator prematurely isolates the refueling water tank (RWT), how much time is there to correct the situation before the onset of core damage?
If the operator error rate is 0. 1, what is the core damage frequency (CDF)?
In the seco'nd paragraph on page 4-14: additional discussion of the procedure for recovery from loss of off-site power (LOSP) is needed.
Please provide the sequence of events and an approximate time-line for the one-hour recovery.
allowing time needed f'r locating personnel and their travel to the required place.
3.
Fire zones 46A, 46B, and 46E are all charging pump rooms and are credited with three-hour barriers despite open doorways in each.
The consideration of open doorways as vital fire barriers is not consistent with the tire-induced vulnerability evaluation (FIVE) methodology.
Provide the analysis of these compartments with the open doorways explicitly included.
)
0 The CDF's of the containment class electrical penetration
- rooms, 42B and 47A, were reduced by crediting National Electrical Manufacturers Association (NEMA)-4 enclosures with fire propagation-limiting characteristics.
Since these enclosures do not have these assigned characteristics, please provide the bases for reducing the CDFs.
Seismic Events There are no RAIs in this area.
HFO There are no RAIs in this area.
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