ML16342A476
| ML16342A476 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 04/01/1994 |
| From: | Perkins K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Rueger G PACIFIC GAS & ELECTRIC CO. |
| Shared Package | |
| ML16342A477 | List: |
| References | |
| NUDOCS 9404150134 | |
| Download: ML16342A476 (6) | |
See also: IR 05000275/1994007
Text
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UNITED STATES
NUCLEAR REGULATORY COMMISSION
REGION V
1450 MARIALANE,
WALNUTCREEK, CALIFORNIA94595-5368
APR I
iog
Dockets:
50-275
50-323
Licenses:
DPR-82
Pacific
Gas
and Electric Company
ATTN:
G.
H. Rueger,
Senior Vice President
and General
Manager,
Nuclear
Power Generation
Business
Unit
P. 0.
Box 770000
San Francisco,
California 94177
SUBJECT:
NRC
INSPECTION
REPORT 50-275/94-07;
50-323/94-07
(NOTICE OF
VIOLATION)
This refers to the routine inspection
conducted
by H. Miller, and the
inspectors
identified in the enclosed
report, of this office on February
17,
through March 19,
1994.
The inspection
included
a review of activities
authorized for your Diablo Canyon Nuclear
Power Generating Station,
Units
1
and 2, facility.
At the conclusion of the inspection,
the findings were
discussed
with those
members of your staff identified in the enclosed
report.
Areas
examined during this inspection
are identified in the report.
Within
these
areas,
the inspection consisted of selective
examinations
of procedures-
and representative
records,
interviews with personnel,
and observation of
activities in progress.
=
Based
on the results of this inspection,
certain licensed activities were in
violation of NRC requirements,
as specified in the enclosed
Notice of
Violation (Notice).
This violation is of concern
because it involved
a
failure to appropriately
implement the requirements
of an operating
procedure
during reduced
system inventory activities.
Operators
did not
properly vent the reactor vessel
head during
a draindown of the Unit
1 reactor
coolant system.
This resulted
in an abrupt
change
in
RCS level indication of
over six feet.
Although the reactor core
was never in any danger of becoming
uncovered during this event,
the event illustrates the need to positively
control operations
at reduced
inventory and the need for operators
to
anticipate the effects of their actions
before proceeding.
Regarding
an unrelated
issue,
while evaluating
an
NRC followup item during the
period of this inspection, it is our understanding
that Mr. M. Angus,
Manager,
Nuclear Engineering Services,
committed to install
ASME required tailpipe
'rains
in all relief valve tailpipes for which ASHE code
commitments
were
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applicable.
If your understanding
of this commitment differs from ours,
please
contact
me immediately.
You are required to respond
to this letter and should follow the instructions
specified in the enclosed
Notice when preparing your response.
In your
response,
you should document the specific actions taken
and
any additional
actions you plan'to prevent recurrence.
After reviewing your response
to this
Notice, including your proposed corrective actions
and the results of future
inspections,
the
NRC will determine
whether further
NRC enforcement
action is
necessary
to ensure
compliance with NRC regulatory requirements.
In accordance
with 10 CFR 2.790(a) of the NRC's "Rules of Practice,"
a copy of
this letter
and its enclosure(s) will be placed in the
NRC Public Document
Room.
C
The responses
directed
by this letter
and the enclosed
Notice are not subject
to the clearance
procedures
of the Office of Management
and
Budget
as required
by the Paperwork Reduction Act of 1980,
Pub.
No.96-511.
Should you have
any questions
concerning this inspection,
we will be pleased
to discuss
them with you.
Sincerely,
'iO~
K. E. Perkins
Acting Regional Administrator
Enclosures:
l.
Appendix A - Notice of Violation
2.
Appendix
B -
NRC Inspection
Reports
'0-275/94-07;
50-323/94-07
CC:
Dr. Richard Ferguson,
Energy Chair, Sierra
Club California
Ms. Nancy Culver,
San Luis Obispo Mothers for Peace
Ms. Jacquelyn
C. Wheeler
Managing Editor, The County Telegram Tribune
Chairman,
San Luis Obispo County Board of Supervisors
Mr. Truman Burns, California Public Utilities Commission
Mr. Robert Kinosian, California Public Utilities Commission
Robert
R. Wellington, Esq.,
Diablo Canyon
Independent
Safety
Committee
Mr. Steve
Hsu, Radiologic Health Branch,
State
Department
of Health Services
Mr. Peter
H. Kaufman,
Deputy Attorney General,
State of California
Christopher J. Warner,
Esq.,
PGRE
Mr. John
Townsend,
Vice President
and Plant Manager,
Diablo Canyon
0
Pacific Gas
And Electric
bcc w/copy of enclosures
I and 2:
Docket File
Project Inspector
Resident
Inspector
K. Perkins
S. Richards
R.
Huey
D. Kirsch
S. Peterson,
G.
Cook
bcc w/enclosure I only:
N. Smith
J.
Bianchi
D. Clevenger
D. Sullivan (electronic copy)
RIV:SRI:DRP I
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File Location:
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