ML16342D787
| ML16342D787 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 09/11/1997 |
| From: | Richards S NRC (Affiliation Not Assigned) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16342D788 | List: |
| References | |
| 50-275-97-201, 50-323-97-201, NUDOCS 9709180107 | |
| Download: ML16342D787 (8) | |
See also: IR 05000275/1997201
Text
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UNITED STATES
NUCLEAR REGULATORY COMMISSION
WASHINGTON~ 0 C
2055&0001
September
11 '997
Mr. Greec"y
M. Rueger
Pacific Gas
& Electric Company
NPG-Mail Code
A10D
PO Box 770000
San Francisco.
CA
94177
Dear
Mrs Rueger:
SUBJECT:
NRC
INSPECTION OF THE DIABLO CANYON POWER
PLANT (REPORT
NOS.
50-275/97201
AND 50-323/97201)
During the period June 9-12,
1997. the Special
Inspection
Branch of tne U.S.
Nuclear Regulatory Commission's
(NRC's) Office of Nuclear Reactor
Regulation
(NRR) performed
an inspection of Pacific Gas
8 Electric Company's
(PG8E's)
activities related to the procurement'odifications
testing
and installation
of replacement
4-kV circuit breakers
at the Diablo Canyon
Power Plant
(DCPP)
~
Units
1 and 2.
The primary purpose of the inspection
was to determine if design verification
testing of the modified breaker
was accomplished
in accordance
with applicable
requirements
of American National Standards
Institute (ANSI)/Institute of
Electrical
and Electronic Engineers
( IEEE) Standards'
secondary
purpose of
the inspection
was to examine several
related
issues
involving production
testings modifications'nd post installation testing in-service
failures'he
results of this inspection are contained in the enclosed
inspection
report.
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With respect to design verifications the inspectors
determined that PG&E's
approach
was generally consistent with the applicable
NRC regulations
in that
PG&E undertook to verify. by engineering
analysis
and
a testing
program, that
DCPP's safety-related
4-kV electrical distribution system,
as converted
and
modified, would perform its safety functions under all design basis
conditions.
By NR(. let".er dated July 24,
1997 (Attachment
1 to the enclosed
inspection report). the question of consistency of the approach with
applicable industry standards,
in particular, taking credit for certain design
verification tests
done by the manufacturer of the circuit breakers
used in
the conversions
was referred to the Standards
Board of the
IEEE for
consideration
by the appropriate
subcommittee.
The details of the
IEEE
response.
contained in an August 21.
1997, letter from the
IEEE Power
Engineering Society Switchgear
Committee (Attachment
2 to the enclosed
report). are discussed
in the report.
In summary.
the
PG&E approach is
considered
consistent with the intent of the standards.
Although there is no
regulatory guide endorsing the standards
in question,
PG&E has committed to
them in the Final Safety Analysis Report
(FSAR) for
DCPP,
and they are
therefore relevant to the design
and licensing basis of the plant.
With
regard to the engineering
evaluations
necessary
to support the
PG8E approach,
the inspectors
could not
~ on the basis of documentation available for review
at
~ conclusively determine the adequacy of all the justifications for not
reperforming certain design tests.
9709i80i07 9709ii
ADOCK 05000275
8
III
Mr. Gregory
M. Rueger
-2-
Theref'ore,
the inspectors identified the need for further review at National
Technical
Systems
(NTS)
~ Inc., Acton, Massachusetts;
and possibly also
Power
Distribution Services
(PDS), Inc.. Cincinnati, Ohio.
In accordance
with 10 CFR 2.790 of the Commission's
regulations'
copy of this
letter and inspection report will be placed in the
NRC Public Document
Room.
Should you have any questions
concerning the attached
inspection
reports
please
contact the inspection
team leader,
Mr. Stephen
Alexander, at (301) 415-2995.
Sincerely,
/
/
Stuart A. Richards,
Chief
Special
Inspection
Branch
Division of Inspection
and Support
Programs
Office of Nuclear Reactor
Regulation
cc:
See next page
Docket Nos.
50-275 and 50-323
License Nos.:
Enclosure:
Inspection Report
No. 50-275,323/97201
Distribution:
<<"iOocket-Ff le's,-.50-276':and.50.-.323,>
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SAlexander
(2 signed copies)
Sl~ck
PPdr cQ KY'g< R ~~
DOCUMENT NAME:
G:KALEXANDENDIABLO.IR
- See previous concurrence.
To receive s redacted copy ot thta document, Indicate in the box:
C
Copy without sttachmentlenclosure
E
~ Copy with attachment/enclosure
N
No copy
OFFICE
PSIB
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PS:
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SAlexander:s f
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richards
DATE
7/31/97*
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9/ //97
9// /97
/
/97
Mr. Gregory
M. Rueger
- 3-
September
11.
1997
CC:
NRC Resident
Inspector
Diablo Canyon Nuclear
Power Plant
c/o U.S. Nuclear Regulatory Commission
P.O.
Box 369
~
Avila Beach
~ Cali fornia
93424
Dr. Richard Ferguson
~ Energy Chair
Sierra
Club Cali fornia
1100 lith,Street,
Suite
311
Sacramento.
Cali forni a
95814
Ms. Nancy Culve"
San Luis Obispo
Mothers for Peace
P.O.
Box 164
Pismo Beach, California
93448
Chairman
San Luis Obispo County Board of
Supervisors
Room 370
P.O.
Box 112
County Government
Center
San Luis Obispo. California
93408
Mr. Truman Burns
Mr. Robert Kinosian
California Public Utili'ties Commission
505 Van Ness,
Room 4102
San Francisco,
94102
Mr. Steve
Hsu
Radiologic Health Branch
State
Department of Health Services
Post Office Box 942732
Sacramento,
94232
Diablo Canyon
Independent
Safety
Committee
ATTN:
Robert
R. Wellington,
Esq.
Legal Counsel
857 Cass Street,
Suite
D
Monterey. California
93940
Regional Administrator,
Region
IV
U.S. Nuclear Regulatory Commission
Harris
Tower
8 Pavilion
611
Ryan Plaza Drive, Suite 400
Arlington, Texas
76011-8064
Christopher J.
Warner,
Esq.
Pacific Gas
8 Electric Company
Post Office Box 7442
San Francisco.
94120
Mr. Robert
P.
Powers
Vice President
and Plant Manager
Diablo Canyon Nuclear
Power Plant
P.O.
Box 56
Avila Beach,
Cali.fornia
93424
Telegram-Tribune
ATTN:
Managing Editor
1321 Johnson
Avenue
San Luis Obispo,
CA
93406
Mr. Gregory
M. Rueger
September
11,
1997
cc w/encl:
NRC Resident
Inspector
Diablo Canyon Nuclear
Power Plant
c/o U.S. Nuclear Regulatory
Commission
P.O.
Box 369
Avila Beach. California
93424
Dr. Richard Ferguson.
Energy Chai r
1100 lith,Street.
Suite 311
Sacramento.
Cali fornia
95814
Ms.
Nancy Culver
San Luis Obispo
Mothers for Peace
P.O.
Box 164
Pismo Beach, California
93448
Chairman
San Luis Obispo County Board of
Supervisors
Room 370
County Government
Center
San Luis Obispo. California
93408
Mr. Truman Burns
Mr. Robert Kinosian
California Public Utilities Commission
505 Van Ness.
Room 4102
San Francisco.
Cali fornia
94102
Mr. Steve
Hsu
Radiologic Health Branch
State
Department of Hea',th ~ervices
Post Office Box 942732
Sacramento.
94232
Diablo Canyon
Independent
Safety
Committee
ATTN:
Robert
R. Wellington. Esq.
Legal
Counsel
857 Cass Street,
Suite
D
Monterey. California
93940
Redwood Alliance
P.O.
Box 293
Arcata, California
95521
Regioral Administrator.
Region
IV
U.S. Nuclear Regulatory
Commission
Harris Tower
8 Pavilion
611
Ryan Plaza Drive, Suite 400
Arlington. Texas
76011-8064
Christopher
J.
Warner,
Esq.
Pacific Gas
8 Electric Company
Post Office Box 7442
San Francisco,
94120
Mr. Robert
P.
Powers
Vice President
and Plant Manager
Diablo Canyon Nuclear
Power Plant
P.O.
Box 56
Avila Beach, California
93424
Chief. Fuel Cycle and Decommissioning
Branch,
Region
IV
U.S. Nuclear Regulatory Commission
611 Ryan Plaza Drive, Suite 400
Arlington. Texas
76011-8064
Mr. Peter
H. Kaufman
Deputy Attorney General
State of California
110 West A Street,
Suite
700
San Diego. Cali fornia
92101
Mr. Thomas
A. Moulia
Humboldt Bay Plant Manager
Humboldt Bay Nuclear
Power
Plant
1000 King Salmon Avenue
Eureka. California
95503
Chairman,
Humboldt County Board
of Supervisors
County Courthouse
825 Fifth Street
Eureka, California
95501