ML16341G444
| ML16341G444 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 01/31/1992 |
| From: | Richards S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16341G445 | List: |
| References | |
| NUDOCS 9202180131 | |
| Download: ML16341G444 (6) | |
See also: IR 05000275/1991040
Text
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UNITED STATES
NUCLEAR REGULATORYCOMMISSION
REGION V
1450 MARIALANE
WALNUTCREEK, CAUFORNIA94596-5368
dAN.
Docket Nos. 50-275
and 50-323
Pacific
Gas
and Electric Company
77 Scale Street,
Room 1451
San Francisco,
California 94106
Attention:
Mr. G.
M. Rueger,
Senior Vice President
and General
Manager,
Nuclear
Power Generation
Business
Unit
Gentlemen:
Subject:
NRC Inspection of Diablo Canyon Units
1 and
2
This refers to the routine inspection
conducted
by H. gong
and M. Miller
during the period of November
19 through
December .31,
1991.
This inspection
examined your activities
as authorized
by NRC License
Nos.
and DPR-82.
At the conclusion of the inspection,
discussions
of their findings were held
with you and other members of your staff.
Areas
examined during this inspection
are described
in the enclosed
inspection
report.
Within these
areas,
the inspection consisted of selective
examinations
of procedures
and representative
records,
interviews with
personnel,
and observations
by the inspectors.
No violations of NRC requirements
were identified
as
a result of this
inspection.
However, this inspection
noted weaknesses
in the preparation
and
implementation of an operability evaluation involving post-accident
monitoring
instrumentation,
which had
been reviewed
by the Plant Staff Review Committee
and approved
by the acting plant manager.
Factual errors
were made
and
corrective actions stated
in the evaluation
were not in all cases fully
implemented.
This demonstr ates
a need for engineering
personnel
to more fully
~ understand
the plant configur ation
and for corrective actions to be fully
coordinated
and verified.
We note that you have initiated certain actions
which should prevent these errors from recurring.
In addition, your attention is directed to paragraph
6.a,
which discusses
the
continuing problem associated
with the steam
admission
valve to the Unit
1
turbine-driven auxiliary feedwater
pump (FCV-95).
We are concerned with the
lack of identification of a root cause of the intermittent failures of
FCV-95.
We note that you are continuing to monitor the valve
and will be
i'nstrumenting the
same valve in Unit 2.
In accordance
with 10 CFR 2.790(a),
a copy of this letter
and the enclosure
will be placed in the
NRC Public Document
Room.
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9202180131
920131
ADOCK 05000275
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Mr. G. M. Rueger
-2-
Should you have
any questions
concerning this inspection,
we will be pleased
to discuss
them with you.
Sincerely,
S. A. Richards,
Chief
Reactor Projects
Branch
Enclosure:
Inspection Report Nos. 50-275/91-40
and 50-323/91-40
cc w/enclosure:
J.
A. Sexton,
PG5E
R. F. Locke,
PG5E
J.
D. Townsend,
PGLE (Diablo Canyon)
D. A. Taggart,
PGSE (Diablo Canyon)
T. L. Grebel,
PGEE (Diablo Ca;;on)
B. Thomas,
News Services,
PGEE
R. Hendrix, County Administrator
State of California
Sandra Silver
bcc w/enclosure:
Project Inspector
Resident
Inspector
Docket File
J. Martin
B. Faulkenberry
G.
Cook
bcc w/o enclosure:
M. Smith
J.
Zo1 l icoffer
J. Bianchi
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MMiller~
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( /ll /92
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PMorrill
SRichards
/ /3I /92
REQUEST
Y
REQUEST
Y
REQUEST
YES /
NO
YES /
N
YES /
NO
NO
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NO
R
UEST
COPY
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/
NO
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YES /
NO