ML17311B287
| ML17311B287 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 12/01/1995 |
| From: | Gwynn T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Stewart W ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| Shared Package | |
| ML17311B288 | List: |
| References | |
| NUDOCS 9512060181 | |
| Download: ML17311B287 (8) | |
See also: IR 05000528/1995098
Text
UNITED STATES
CLEAR REGULATORY COMMISSIO
REGION IV
611 RYAN PLAZA DRIVE, SUITE 400
ARLINGTON,TEXAS 76011.8064
I
I995
Arizona Public Service
Company
ATTN:
William L. Stewart
Executive Vice President.
Nuclear
P.O.
Box 53999
Phoenix,
85072-3999
SUBJECT:
NRC
INSPECTION REPORT 50-528/95-98:
50-529/95-98:
50-530/95-98
This refers to the inspection
conducted
by Mr. C. J.
Paulk and
Ms. L. J.
Smith
of this office on August 3-4,
1995, at the Palo Verde Nuclear Generating
Station.
Units l. 2.
and 3, facility.
This initiative was prompted
by
recurring fai lures of safety-related
steam turbine-driven standby
pumps at
several facilities in Region IV.
We concurrently performed this inspection at
most of the Region
IV facilities to better understand
the scope of design,
maintenance.
and testing practices
related to safety-related
steam turbines.
which were supplied
by the Terry Corporation.
We also examined several
aspects
of various experience
review processes
to determine
why similar
failures continued to occur.
On November 9.
1995, at the conclusion of the
in-office review, the findings were discussed
with those
members of your staff
identified in the enclosed
report.
Areas
examined during the inspection
are identified in the report.
Within
these
areas.
the inspection consisted of selective examinations of procedures,
representative
records,
and interviews with personnel.
The combined results
of this inspection
for each of the Region
IV facilities are documented
in the
enclosed
report
and executive
summary.
With respect to your facility. the inspection
found that, while your original
designs
were susceptible to many of the fai lure mechanisms
described
in this
reports
your engineers
have addressed
most of the vulnerabi lities.
The
inspection
noted two remaining factors which influence turbine reliability.
We noted that your use of a lubricant with vapor-phase
inhibitors was
consistent with vendor recommendations.
However.
use of this oil at other
facilities with high standby temperatures
has resulted in governor speed
control problems'nd
improper operation of the overspeed trip tappet.
While
you have not experienced
any problems related to the use of this type of
lubricant. your turbine would become susceptible if your steam
admission
valves
leaked significantly.
We also noted the absence
of alarms or
indication to alert operators to potential
problems in the turbine steam line
condensate
removal
system.
We encourage
you to review these conditions to
ensure
continued reliable operation of the auxiliary feedwater
pump turbines.
In accordance
with 10 CFR 2.790 of the NRC's "Rules of Practice,"
a copy 'of
this letter and its enclosures will be placed in the
NRC Public Oocument
Room.
9512060i8i 95i20i
ADGCK 05000528
8
Zqo
I (
Arizona Public Service
Company
-2-
Should you have any questions
concerning this inspection.
we will be pleased
to discuss
them with you.
Si neer ely,
Dockets:
50-528
50-529
50-530
Licenses:
NPF-51
T omas
P.
Gwynn,
D
or
Division of Reactor Safety
Enclosu're:
NRC Inspection
Report
50-528/95-98:
50-529/95-98;
50-530/95-98
w/attachments
cc w/enclosure:
Arizona Corporation
Commission
ATTN:
Hr. Steve
Olea
1200
W. Washington Street
Phoenix,
85007
Southern California Edison
Company
ATTN:
T.
E. Oubre.
Esq.
P.O.
Box 800
Rosemead.
91770
Arizona Radiation Regulatory Agency
ATTN:
Aubrey V. Godwin, Director
4814 South
40 Street
Phoenix,
85040
Haricopa
County Board of Supervisors
ATTN:
Chai rman
'111
South Third Avenue
Phoenix.
85003
I
0
I
Arizona Public Service
Company
Palo Verde Services
ATTN:
Curtis Hoskins,
Executive
Vice President
and
Chief Operating Officer
2025
N. 3rd Street.
Suite 220
Phoenix.
85004
Akin. Gump, Strauss,
Hauer
and Feld
El Paso Electric Company
ATTN:
Roy P.
Lessey. Jr.,
Esq.
1333
Avenue. Suite 400
D.C.
20036
Arizona Public Service
Company
ATTN:
Angela
K. Krainik, Manager
Nuclear Licensing
P.O.
Box 52034
Phoenix,
85072-2034
M
'
Arizona Public Service
Company
-4-
E-Mail report to D. Nelson
(DJN)
E-Mail report to NRR Event Tracking System
( IPAS)
bcc to
DMB ( IE01)
bcc distrib. by RIV:
L. J. Callan
DRSS- F IPB
Branch Chief (DRP/F,
WCFO)
Senior
Project Inspector
(DRP/F,
WCFO)
Leah Tremper
(OC/LFDCB,
MS:
TWFN 9E10)
Resident
Inspector
HIS System
RIV File
Branch Chief (DRP/TSS)
M.
Hammond
(PAO,
WCFO)
DOCUMENT NAME:
R:K PVNPV598RP.CJP
To receive copy of document, indicate In box: "C" ~ Copy without enclosures
" " ~ Copy with enclosures "N" ~ No copy
RIV: RI: EB
LJSmith
ll/Z5/95
RI: HB
CJPaulk*
11/22/95
C:EB
E
CAVanDenburgh*
11/22/95
D:DRS
TPGwynn
1W
/95
D:DRP
JEDye qaQ
11/Vl/95
D:DRS
TPGwyn
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