ML20154R164
| ML20154R164 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 10/20/1998 |
| From: | Burgess B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Gipson D DETROIT EDISON CO. |
| Shared Package | |
| ML20154R166 | List: |
| References | |
| 50-341-98-13, NUDOCS 9810260205 | |
| Download: ML20154R164 (2) | |
See also: IR 05000341/1998013
Text
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October 20, 1998
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Mr. D. R. Gipson -
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- Senior Vice President
Nuclear Generation
The Detroit Ediso 1 Company
6400 North Dixie Highway
Newport,-MI 48166
. SUBJECT:
FERMI INSPECTION REPORT 50-341/98013(DRP)
Dear Mr. Gipson:
i
On September.21,1998 the NRC completed an inspection at your Fermi 2 reactor facility.' The
enclosed report presents the results of that inspection.
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During the 7-week period covered by this inspection, the plant operated at reduced power in
response to the closure of the No. 4. main turbine control valve. The No. 4 turbine control valve
was closed subsequent to a determination that the valve was contributing to secondary power
oscillations. - An evaluation by General Electric determined that the plant could operate safely at
reduced power with the No. 4 turbine control valve closed. During the plant shutdown for
Refueling Outage 6, another secondary power oscillation occurred. The operators in the control
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room manually scrammed the reactor, and an investigation was conducted to determine the
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root cause. This investigation determined that the power oscillations were caused by loose
valve actucion linkage for the No. 3 turbine control valve. Evaluation and analysis of the
degraded conditions of both valves was performed during the refueling outage.
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In addition to the secondary power oscillations, the report discusses a number of work control
related deficiencies that contributed to human performance errors during the conduct of work
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activities. Your continued attention to this aren is warranted.-
in accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter and the
enclosure will be placed in the NRC Public Document Room.
Sincerely,
/s/ Bruce L. Burgess
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Bruce L. Burgess, Chief
.
Reactor Projects Branch 6
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Docket No.: 50-341
License No.: NPF-43
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Enclosure:
Inspection Report 50-341/98013(DRP)
See Attached Distribution
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cc w/ encl:
N. Peterson, Director, Nuclear Licensing
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P. Marquardt, Corporate Legal Department
R. Gaston, Compliance Supervisor
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R. Whale, Michigan Public Service Commission
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Michigan Department of Environmental Quality
Monroe County, Emergency Management Division
Emergency Management Division, MI Department
of State Police
Distribution:
CAC (E-Mail)
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RPC (E-Mail)
Project Mgr., NRR w/enci -
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J. Caldwell, Rlli w/ encl
C. Pederson, Rill w/enci
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B. Clayton, Rlli w/enct
~ SRI Fermi w/enci
DRP w/enct
TSS w/enci
. DRS (2) w/encI
- Rlli PRR w/enci
- PUBLIC IE-01 w/enci
Docket File w/enci
GREENS
LEO (E-Mail)
DOCDESK (E-Mail)
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