ML20216K008
| ML20216K008 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 09/04/1997 |
| From: | Richards S NRC (Affiliation Not Assigned) |
| To: | Jeffery Wood CENTERIOR ENERGY |
| Shared Package | |
| ML20216K011 | List: |
| References | |
| 50-346-97-201, NUDOCS 9709180173 | |
| Download: ML20216K008 (4) | |
See also: IR 05000346/1997201
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UNITED STATES
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NUCLEAR REQULATORY Commission
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September 4, 1997
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-Mr.-John K. Wood
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Vice-President - Nuclear, Davis-Besse
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Centerior Service Company
c/o Toledo Edison Company
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Davis Besse Nuclear Power Station
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5501 North State Route 2
Dak. Harbor, Ohio 43449-9760
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SUBJECit DAVIS-BESSE DESIGN INSPECT 10N'
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(NRC.INSPEC110N REPORT NO. 50-346/97-201)
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Dear Mr. Wood:
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.A design inspection at Davic-Besse was performed by the Special Inspection
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BranchoftheOfficeofNuclearReactorRegulation-(NRR)duringtheperiod
. April 14, 1997 through June 20, 1997, including on-site inspections during
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May 5-9, May 19-23, and June 9-20, 1997.
The team selected for inspection the
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high pressure injection (HPI) system and the low pressure injection (LPI)
functionsofthedecayheatremoval. system (DHRS).
The purpose of the
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~ inspection was to evaluate the ,apability of the systems to perform safety
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functions required by their design bases, the adherence to the design and
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licensing bases, and the consistency of the as-built configuration with the
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updated safety analysis report (USAR),
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The results'of this ins uction are presented in the enclosed report.
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inspection team noted t1at the mechanical, electrical, and instrumentation and
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control designs of the HPI and.LPI systems were adequate to provide the
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required emergency core cooling flow to mitigate design basis accidents, and
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concluded that the systems were capable of performing their safety functions.
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The team identified some weaknesses in the design process and installation of
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the systems.
For example: reverse flow testing of check valves DH81 and DH82
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on the-two LPI pump tuction linas from the borated water storage tank (BWST)
and seat leakage testing of stop check valves HP31 and.HP32'on the HPI pump
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recirculation lines were not done; and although your staff had identified the
deterioration of the BWST level transmitter support hardware in 1994, no
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. action was taken to remove, examine, _and replace the hardware until the
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inspection team expressed its concern on the condition of the supports. =The
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-team referred to NRR-staff for evaluation the issue of the acceptability of
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Lthe use of normally open safety-related valves as safety class interface
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between the HPI-system and: local pressure gages that were not seismically
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qualified.
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NBC FRE CENTER 00PY
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Mr. John K. Wood
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Other issues identified by the team included USAR discrepancies, weaknesses in
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periodic testing of battery chargers, lack of testing of inverters, not
including certain electrical components in the environmental qualification
program, and not revising an installation detail drawing af ter modifying the
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actuators for DHR cooler outlet and bypass valves.
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You have initiated measures to addresh the team's concerns.
In order for the
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NRC to coordinate follow-up inspections, please provide within 60 days of this
letter a schedule for com)1etion of your corrective actions for the open items
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listed in Appendix A of t.1e enclosed report,
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Any enforcement action resulting from this inspection will be handled by the
NRC Region ill office via separate correspondence.
As with all NRC inspections, we expect that you will evaluate the
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ap)1icability of the results of this inspection and the specific findings to
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olier systems and components.
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 the attached inspection report, please contact the project manager,
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Mr. A.G. Hansen at (301) 415-1390, or the inspection team leader, Mr. S.K.
Malur at (301) 415-2963.
Sincerely,
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Stuart A. Richards, Chief
Special Inspection Branch
Division of Inspection and Support Programs
Office of Nuclear Reactor Regulation
Docket No.:
50-346
Enclosure :
NRC Inspection Report No.: 50-346/97-201
cc:
see next page
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John K. Wood
Davis-Besse Nuclear Power Station
Toledo Edison Company
Unit No. 1
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Mary E. O'Reilly
Robert E. Owen, Chief
Centerior Energy Corporation
Bureau of Radiological Health
300 Madison Avenue
Service
Toledo, OH 43652
Ohio Department of Health
P.O. Box 118
James L. Freels
Columbus, OH 43266-0118
Manager - Regulatory Affairs
Toledo Edison Company
James R. Williams
Davis-Besse Nuclear Power Station
Chief of Staff
5501 North State - Route 2
Ohio Emergency Management Agency
Oak Harbor, 011 43449-9760
2055 West Dublin Granville Road
Columbus, OH 43235-2206
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Gerald Charnoff, Esq.
Shaw, Pittman, Potts
Donna Owens, Director
and Trowbridge
Ohio Department of Commerce
2300 N Street, NW.
Division of Industrial Compliance
Washington, DC 20037
Bureau of Operations & Maintenance
6606 Tussing Road
P.O. Box 4009
Regional Administrator
Reynoldsburg, OH 43068-9009
U.S. NRC, Region 111
801 Warrenville Road
Ohio Environmental Protection Agency
Lisle, IL 60523-4351
DERR--Compliance Unit
ATTN:
Zack A. Clayton
Robert B. Borsum
P.O. Box 1049
Babcock & Wilcox
Columbus, OH 43266-0149
Nuclear Power Generation Division
1700 Rockville Pike, Suite 525
State of Ohio
Rockville, MD 20852
Public Utilities Commission
180 East Broad Street
Resident inspector
Columbus, OH 43266-0573
U.S. Nuclear Regulatory Commission
5503 North State Route 2
Attorney General
Oak Harbor. OH 43449
Department of Attorney
30 East Broad Street
James H. Lash, Plant Manager
Columbus, OH 43216
Toledo Edison Company
Davis-Besse Nuclear Power Station
President, Board of County
5501 North State Route 2
Commissioner of Ottawa County
Oak Harbor, OH 43449-f760
Port Clinton, OH 43252
Roy P. Lessy, Jr.
Akin, Gump. Srauss, Hauer & Feld, LLP
1333 New Hampshire Ave., NW., Ste 400
Washington, DC 20036
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Distribution -
Docket files 50-346
PSIB R/F
BSheron, NRR
FPGillespie, NRR
SARichards, NRR
DPNorkin, NRR-
CERossi, AE00-
EAdensam, NRR
GHMarcus, NRR
AGHansen, NRR
CBoyle. NRR
SStasek, SRI
Regional Administrators
Regional Division Directors
Inspection Team
PUBLIC
ACRS (3)
.0GC (3)
15 Distribution
SPSB, NRR
PRAB,'RES
RAB, AE00
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