ML16341G436
| ML16341G436 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 01/24/1992 |
| From: | Kirsch D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16341G437 | List: |
| References | |
| GL-89-10, NUDOCS 9202110231 | |
| Download: ML16341G436 (8) | |
See also: IR 05000275/1991039
Text
UNITEO STATES
NUCLEAR REGULATORY COMMISSION
REGION V
1460 MARIALANE, SUITE 210
WALNUTCREEK, CALIFORNIA84696-6368
~F)AH a4 ~9m
Docket Nos.:
50-275
and 50-323
Pacific Gas
and Electric Company
77 Beale Street,
Room 1451
San Francisco,
94106
Attention:
Mr. Gregory
M. Rueger
Senior Vice President
and. General
Manager
Nuclear
Power Generation
Business
Unit
Gentlemen:
SUBJECT:
NRC INSPECTION
OF DIABLO CANYON NUCLEAR POWER
PLANT (DCPP)
This letter refers to the inspection
led by Mr. Dave Corporandy of this office
during the weeks of October
21 and
November 4, 1991, of activities authorized
by
NRC License
Nos.
and to the discussion of.our findings .
held with members of your staff on November 8, 1991.
Additional in-office
review of licensee
provided documents
continued through
November
29,
1991.
The
inspection evaluated
the adequacy of Diablo Canyon actions to assure
the
reliability of motor operated
valves
(MOVs).
Our inspectors
reviewed the
program that you have developed
in response
to
NRC Generic Letter 89-10,'Safety-Related
Motor Operated
Valve Testing
and Surveillance."
Generic Letter 89-10 provides
recommendations
for licensees
to develop
and implement
programs to ensure that
MOVs will operate properly under
design
b'asis
conditions.
Specific 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
of ongoing maintenance
of MOVs.
In general,
the inspection findings indicated that you appear to be developing
an aggressive,
well-integrated
program for assuring
MOV reliability.
Program
strengths
were found in the area of program
scope
and your high impact team
(HIT) approach to integrating the multidisciplined activities required for
the 89-10 program.
The inspection findings also indicated that your program
has areas
of weakness
and areas
in need of further development.
Your calculation methodology to
verify MOV capability
and switch setpoints
needs
improvement.
Specific
concerns
are outlined in the enclosed
inspection report
summary
and detailed
in the body of the inspection report,
Further development is needed in the
areas
of periodic verification and trending of MOV performance
parameters.
Regarding the overall administration of your program,
we are concerned with
your methods for determining
when
MOV operability evaluations
are required.
Your test evaluations for determining operability are
complex
and lengthy.
We
9202110231
920124
ADOCK 05000275
Q
-2-
are encouraged
by your.willingness
to modify MOVs, if. necessary,
to establish
..
capability based
on your GL 89-10 program factors,
but are concerned that your
threshold for evaluating
MOV operability is less stringent.
Further details
on this subject
are discussed
in the enclosed
report.
As mentioned at the
exit meeting
and in the enclosed report,
prompt corrective action should
be
initiated upon the discovery of any valve operability concerns.
No violations or deviations
were identified within the scope of this
inspection.
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.
Should you have
any questions
concerning this inspection,
we will be pleased
to discuss
them with you.
Sincerely,
.
F. Kirs
, Chief
Reactor Safety Branch
Enclosure:
Inspection
Report
Nos.
50-275/91-39
and 50-323/91-39
cc w/enclosure:
J.
A. Sexton,
PG8E
J.
D. Townsend,
Vice President/Plant
Manager,
PG8E
R.
F.
Locke, Esq.,
PG8E
D.
A. Taggart, Director, equality Support,
PG8E
B. Thomas,
News Services,
PG8E
T.
L. Grebel,
Regulatory Compliance Supervisor,
PGEE
State of California
Bob Hendrix, County Administrator
Sandra Silver (report only)
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