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June 18, 2001 June 18, 2001
Gregory M. Rueger, Senior Vice President
and General Manager
Nuclear Power Generation Bus. Unit
Pacific Gas and Electric Company
Nuclear Power Generation, B32
77 Beale Street, 32nd Floor
P.O. Box 770000
San Francisco, California 94177
SUBJECT:
DIABLO CANYON INSPECTION REPORT NO. 50-275/01-03; 50-323/01-03
Dear Mr. Rueger:
On May 19, 2001, the NRC completed routine resident inspection at the Diablo Canyon Nuclear
Power Plant, Units 1 and 2, facility. The enclosed report documents the inspection findings that
were discussed on May 18, 2001, with James R. Becker and members of your staff.
This inspection examined activities conducted under your licenses as they relate to safety and
compliance with the Commission's rules and regulations, and with the conditions of your licenses.
The inspectors reviewed selected procedures and records, observed activities, and interviewed
personnel.
One issue was evaluated under the Significance Determination Process and was determined to
be of very low safety significance (Green). The issue involved two sources of offsite power and a
diesel generator on Unit 2 being inoperable longer than allowed by the Technical Specifications.
This issue has been entered into your corrective action program and is discussed in the summary
of findings and in the body of the attached inspection report. This issue was determined to
involve a violation of NRC requirements, but because of its very low safety significance and that it
has been entered into your corrective action program, the violation is noncited, consistent with
Section VI.A of the NRC Enforcement Policy. The noncited violation is described in the subject
inspection report. If you contest the violation, you should provide a response within 30 days of the
date of this inspection report, with the basis for your denial, to the U. S. Nuclear Regulatory
Commission, ATTN: Document Control Desk, Washington, DC 20555-0001, with copies to the
Regional Administrator, U. S. Nuclear Regulatory Commission, Region IV, 611 Ryan Plaza Drive,
Suite 400, Arlington, Texas 76011; the Director, Office of Enforcement, U. S. Nuclear Regulatory
Commission, Washington, DC 20555-0001; and the NRC Resident Inspector at the Diablo
Canyon, Units 1 and 2, facility.
Pacific Gas and Electric Company filed for voluntary bankruptcy proceedings during this
inspection period. The NRC has exercised communications channels to better understand your
planned and implemented actions, especially as they relate to your responsibility to safely operate Pacific Gas and Electric Company
-2-
the Diablo Canyon reactors. NRC inspections, to date, have confirmed that you are operating
these reactors safely and that public health and safety is, thus far, assured.
In response to these conditions, there will continue to be two differences in how the Region
communicates its inspection findings. First, we will continue the 6-week periodicity of our
integrated inspection reports (the other reactors in Region IV implemented a quarterly report
frequency, with the exception of San Onofre Nuclear Generating Station). Second, the description
of the scope of the individual inspection activities will be more detailed. This is being done to
keep the public more fully informed of the breadth and depth of the NRCs inspection and
oversight activities.
In accordance with 10 CFR 2.790 of the NRC's "Rules of Practice," a copy of this letter and its
enclosure will be available electronically for public inspection in the NRC Public Document Room
or from the Publicly Available Records (PARS) component of NRC's document system (ADAMS).
ADAMS is accessible from the NRC Web site at http://www.nrc.gov/NRC/ADAMS/index.html (the
Public Electronic Reading Room).
Sincerely,
/RA/
William B. Jones, Chief
Project Branch E
Division of Reactor Projects
Docket Nos:
50-275
50-323
License Nos: DPR-80
DPR-82
Enclosure:
NRC Inspection Report No.
50-275/01-03; 50-323/01-03
cc w/enclosure:
David H. Oatley, Vice President
Diablo Canyon Operations and Plant Manager
Diablo Canyon Nuclear Power Plant
P.O. Box 56
Avila Beach, California 93424
Lawrence F. Womack, Vice President, Power
Generation & Nuclear Services
Diablo Canyon Power Plant
P.O. Box 56
Avila Beach, CA 93424 Pacific Gas and Electric Company
-3-
Dr. Richard Ferguson
Energy Chair
Sierra Club California
1100 llth Street, Suite 311
Sacramento, California 95814
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
Truman Burns\Mr. Robert Kinosian
California Public Utilities Commission
505 Van Ness, Rm. 4102
San Francisco, California 94102
Robert R. Wellington, Esq.
Legal Counsel
Diablo Canyon Independent Safety Committee
857 Cass Street, Suite D
Monterey, California 93940
Ed Bailey, Radiation Program Director
Radiologic Health Branch
State Department of Health Services
P.O. Box 942732 (MS 178)
Sacramento, CA 94327-7320
Steve Hsu
Radiologic Health Branch
State Department of Health Services
P.O. Box 942732
Sacramento, California 94327-7320
Christopher J. Warner, Esq.
Pacific Gas and Electric Company
P.O. Box 7442
San Francisco, California 94120 Pacific Gas and Electric Company
-4-
City Editor
The Tribune
3825 South Higuera Street
P.O. Box 112
San Luis Obispo, California 93406-0112
Robert A. Laurie, Commissioner
California Energy Commission
1516 Ninth Street (MS 31)
Sacramento, CA 95814 Pacific Gas and Electric Company
-5-
Electronic distribution from ADAMS by RIV:
Regional Administrator (EWM)
DRP Director (KEB)
DRS Director (ATH)
Senior Resident Inspector (DLP)
Branch Chief, DRP/E (WBJ)
Senior Project Engineer, DRP/E (GAP)
Section Chief, DRP/TSS (PHH)
RITS Coordinator (NBH)
Only inspection reports to the following:
Scott Morris (SAM1)
NRR Event Tracking System (IPAS)
DC Site Secretary (AAJ)
Dale Thatcher (DFT)
R:\_DC\2001\DC2001-03RP-DLP.wpd
RIV:SRI:DRP/E
SPE:DRP/E
C:DRP/E
DLProulx
GAPick
WBJones
/RA/
T-WBJones
/RA/
6/18/01
6/18/01
6/18/01
OFFICIAL RECORD COPY
T=Telephone E=E-mail F=Fax ENCLOSURE
U.S. NUCLEAR REGULATORY COMMISSION
REGION IV
Docket Nos:
50-275
50-323
License Nos:
DPR-80
DPR-82
Report No:
50-275/01-03
50-323/01-03
Licensee:
Pacific Gas and Electric Company
Facility:
Diablo Canyon Nuclear Power Plant, Unit 1 and 2
Location:
7 ½ miles NW of Avila Beach
Avila Beach, California
Dates:
April 1 through May 19, 2001
Inspectors:
D. L. Proulx, Senior Resident Inspector
T. W. Jackson, Resident Inspector
G. A. Pick, Senior Project Engineer, Region IV
Approved By:
W.B. Jones, Chief, Project Branch E
Division of Reactor Projects
ATTACHMENTS:
Attachment 1
Supplemental Information
Attachment 2
Auxiliary 1-2 Overheated Joint 309 SUMMARY OF FINDINGS
IR 05000-275-01-03, IR 05000-323-01-03, on 4/1/01 to 5/9/01, Pacific Gas and Electric Co.,
Diablo Canyon Nuclear Power Plant, Units 1 and 2. Resident Inspector Report. Maint. Risk
Assess. and Emerg. Work Cont.
This report covers a 7-week routine resident inspection conducted from April 1 through
May 19, 2001. One Green finding was identified. The significance of most findings is indicated by
their color (Green, White, Yellow, or Red) using IMC 0609 Significance Determination Process.
Findings for which the Significance Determination Process does not apply are indicated by No
Color or by the severity level of the applicable violation. The NRCs program for overseeing the
safe operation of commercial nuclear power reactors is described at its Reactor Oversight
Process website at
http://www.nrc.gov/NRR/OVERSIGHT/index.html
.
A.
Inspector Identified Findings
Cornerstone: Mitigating Systems Green. A violation of Technical Specification 3.0.3 and 3.8.1.1 occurred because
operators rendered two sources of offsite power and a diesel engine generator inoperable
simultaneously for approximately 7 hours, but did not take the required actions. Because
of inadequate planning and procedure guidance, operators placed the load tap changer for
Unit 2 Startup Transformer 2-1 to an inappropriate tap setting, but did not declare Startup
Transformer 2-1 inoperable. These actions, coupled with 500 kV auxiliary power
inoperable for breaker cubicle inspections, and Diesel Generator 2-2 inoperable because
of degraded wiring, rendered all three emergency power sources for Vital Bus H
inoperable in excess of the Technical Specification 3.0.3 allowed outage time of 1 hour.
This violation is being treated as a noncited violation, consistent with Section VI.A of the
NRC Enforcement Policy.