ML17300B363
| ML17300B363 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 10/02/1999 |
| From: | Powers D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Overbeck G ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| Shared Package | |
| ML17300B365 | List: |
| References | |
| 50-528-99-11, 50-529-99-11, 50-530-99-11, NUDOCS 9910120251 | |
| Download: ML17300B363 (14) | |
See also: IR 05000528/1999011
Text
REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)
CESSION NBR:9910120251
DOC.DATE: 99/10/02
NOTARIZED: NO
DOCKET I
ACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi
05000528
STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi
05000529
STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi
05000530
AUTH'.NAME
AUTHOR AFFILIATION
POWERS,D.A.
Region
4 (Post
820201)
RECIP.NAME
RECIPIENT AFFILIATION
OVERBECK,G.R.
Arizona Public Service
Co.
(formerly Arizona Nuclear Power
C
SUBJECT:
Forwards insp repts 50-528/99-11,50-529/99-11
6 50-530/99-11
on 990614-0702 with inoffice insp continued until 990901
&
suppl onsite insp from 990830-0902.Violations
occurred,&
being treated
as
NCVs.
DISTRIBUTION CODE: IE01F
COPIES
RECEIVED:LTR
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ENCL
(
SIZE:
TITLE: General
(50 Dkt)-Insp Rept/Notice of Violation Response
NOTES: STANDARDIZED PLANT
Standardized plant.
Standardized plant.
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05000528
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RECIPIENT
ID CODE/NAME
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ERNAL: ACRS
DEDRO
NRR/DIPM/IIPB
NRR/DRIP/REXB
RGN4
FILE
01
EXTERNAL: LMITCO MARSHALL
NRC PDR
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FILE CENTE
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NUDOCS-ABSTRACT
OGC/RP
NOAC
NUDOCS FULLTEXT
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NOTE TO ALL "RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE. TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS
OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT THE DOCUMENT CONTROL
DESK
{DCD)
ON EXTENSION 415-2083
TOTAL NUMBER OF COPIES
REQUIRED:
LTTR
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uNITED STATES
NUCLEAR REGULATORYCOMMISSION
REGION IV
611 RYANPLAZADRIVE, SuITE 400
ARLINGTON,TEXAS760114064
2
1999
Gregg R. Overbeck, Senior Vice
President, Nuclear
Arizona Public Service Company
P.O. Box 52034
Phoenix, Arizona 85072-2034
SUBJECT:
NRC 'INSPECTION REPGRT NO. 50-528/99-11; 50-529/99-11; 50-530/99-11
Dear Mr. Overbeck:
This refers to the inspection conducted on June 14 through July 2, 1999, at the Palo Verde
Nuclear Generating Station, Units 1, 2, and 3, facility. Additional review and inspection were
performed in the Region IVOffice until September
1, 1999. Supplemental onsite inspection
was also conducted August 30 through September 2, 1999. This inspection assessed
your
containment spray system, 125Vdc power system, and portions of your containment isolation
systems for conformance to applicable regulatory requirements for the Palo Verde Nuclear
Generating Station. The enclosed report presents the results of this inspection.
Atthe end of the first onsite period of the inspection, the team leader conducted an exit meeting
with you and members of your staff on July 2, 1999. Following this exit meeting, your staff
provided the inspection team with additional requested information. New information was
provided to the team in several telephonic conferences and during the supplemental onsite
inspection. This'new information changed some of the preliminary findings discussed
in the exit
meeting, necessitating a followup exit meeting that was conducted via teleconference on
September 30, 1999.
Overall, we concluded that the containment spray and 125Vdc systems conformed to their
design and licensing bases and were capable of performing their intended safety functions.
However, we identified numerous errors in design calculations, procedures, and the Updated
Safety Analysis Report. While none of these errors Individuallyconstituted operability
problems, the number of issues revealed problems in the implementation of your design control
program which, under different circumstances,
may have been more significant. Examples of
problems identified by the team included:
(1) improper assumptions,
references, and input
associated with design calculations; (2) inconsistencies among the Updated Final Safety
Analysis Report, design basis calculations, setpoints, and the installed configuration; and (3)
failure to translate changes to design basis calculations, drawings, and procedures.
Some of
these errors appeared to have been caused by a lack of a fullyeffective process for identifying
the interrelationship between calculations.
The team identified several examples in which your engineering staff failed to follow
through'ompletely
with changes to desigh basis calculations resulting from changes in the source
calculations or other inputs. One potential cause of this failure is the practice of relying on
99fOM02M 99f002
ADQCK 05000528
8
e
5
Arizona Public Service Company
-2-
engineering judgement to determine whether the individual significance of a change warrants
an update to the affected calculations.
While such changes may be minor, the collective
impact, which because of your current practices may not be recognized by your staff, could
result in unintended or unacceptable degradations.
Accordingly, we stress that revising design
basis calculations to reflect changes and modifications, regardless of the impact of each
individual change, is an essential element in the maintenance of your plant's design basis.
We,
therefore, encourage you to review your policies, processes,
and practices to ensure that the .
plant's design basis and licensing basis is appropriately maintained.
Based on the results of this inspection, the NRC has determined that violations of NRC
requirements occurred, all of which are being treated as noncited violations, consistent with
Appendix C of the Enforcement Policy. The noncited violations are described in the subject
inspection report.
If you contest any of the violations or severity level of the noncited violations,
you should provide a response within 30 days of the date of this inspection report, with the
basis for your denial, to the Nuclear Regulatory Commission, ATTN: Document Control Desk,
Washington, DC 20555-0001, with copies to the Regional Administrator, Region IV; the
Director, Office of Enforcement, United States Nuclear Regulatory Commission, Washington,
DC 20555-0001; and the NRC Resident Inspector at the Palo Verde Nuclear Generating
Station.,
In accordance with 10 CFR 2.790 of the NRC's "Rules of Practice," a copy of this letter and its
enclosure willbe placed in the NRC Public Document Room.
Should you have any questions concerning this inspection, we will be pleased to discuss them
with you.
Sincerely,
<U.CC ( 4g
'~r-gg. r~~~>
Dr. Dale A. Powers, Chief
Engineering and Maintenance Branch
Division of Reactor Safety
Docket Nos.:
50-528; 50-529; 50-530
License Nos.: NPF-41; NPF-51; NPF-74
Enclosure:
NRC Inspection Report No.
50-528/99-11; 50-529/99-11; 50-530/99-1 1
cc w/enclosure:
Steve Olea
Arizona Corporation Commission
1200 W. Washington Street
Phoenix, Arizona 85007
e
Arizona Public Service Company
Douglas K. Porter, Senior Counsel
Southern California Edison Company
Law Department, Generation Resources
P.O. Box 800
Rosemead,
California 91770
Chairman
Maricopa County Board of Supervisors
301 W. Jefferson, 10th Floor
Phoenix, Arizona 85003
Aubrey Y. Godwin, Director
Arizona Radiation Regulatory Agency
4814 South 40 Street
Phoenix, Arizona 85040
Angela K. Krainik, Director
Regulatory Affairs
Arizona Public Service Company
P.O. Box 52034
Phoenix, Arizona 85072-2034
John C. Horne, Yice President,
Power Generation
El Paso Electric Company
2702 N. Third Street, Suite 3040
Phoenix, Arizona 85004
Terry Bassham,
Esq.
General Counsel
El Paso Electric Company
123 W. Mills
El Paso, Texas
79901
John W. Schumann
Los Angeles Department of Water 8 Power
Southern California Public Power Authority
P.O. Box 51111, Room 1255-C
Los Angeles, California 90051-0100
David Summers
Public Service Company of New Mexico
Albuquerque, New Mexico 87102
~L
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1
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Arizona Public Service Company
Jarlath Curran
Southern California Edison Company
5000 Pacific Coast Hwy..Bldg. DIN
San Clemente, California 92672
Robert Henry
Salt River Project
6504 East Thomas Road
Scottsdale, Arizona 85251
-5-
bcc to DCD (IE01)
bcc distrib. by RIV:
Regional Administrator
Palo Verde Senior Resident Inspector (2)
DRP Director
DRS Director
MIS System
Branch Chief (DRP/D)
Project Engineer (DRP/D)
Branch Chief (DRP/TSS)
RIV File
Arizona Public Service Company
. E-Mail report to T. Frye (TJF)
E-Mail report to D. Lange (DJL)
E-Mail report to NRR Event Tracking System (IPAS)
E-Mail report to Document Control Desk (DOCDESK)
E-Mail report to Richard Correia (RPC)
DOCUMENT NAME: R:5 PNPV9
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To receive co
of document, indicate in bo:
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without enclosures
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OFFICIAL RECORD COPY
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bcc to DCD (IE01)
bcc distrib. by RIV:
Regional Administrator
Palo Verde Senior Resident Inspector (2)
DRP Director
DRS Director
MIS System
Branch Chief (DRP/D)
Project Engineer (DRP/D)
Branch Chief (DRP/TSS)
RIV File
Arizona Public Service Company
E-Mail report to T. Frye (TJF)
E-Mail report to D. Lange (DJL)
E-Mail report to NRR Event Tracking System (IPAS)
E-Mail report to Document Control Desk (DOCDESK)
E-Mail report to Richard Correia (RPC)
DOCUMENT NAME: R:3 PNPV9
RP.RLN.wpd
To receive co
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viithout enclosures
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RIV:SRI:EMB
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OFFICIAL RECORD COPY
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