ML20043C796
| ML20043C796 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 06/01/1990 |
| From: | Holahan G Office of Nuclear Reactor Regulation |
| To: | Fay C WISCONSIN ELECTRIC POWER CO. |
| Shared Package | |
| ML20043C797 | List: |
| References | |
| NUDOCS 9006060187 | |
| Download: ML20043C796 (4) | |
See also: IR 05000266/1990201
Text
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UNITED STATES
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NUCLE AR REGULATORY COMMISSION
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W ASHINGT ON, D. C. 20555
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Oune 1, 1990
Docket Nos. 50-266
and 50-301
Mr. C. W. Fay, Vice President
Nuclear Power
Wisconsin Electric Power Company
,
231 West Michigan Street - P379
Milwaukee, Wisconsin 53201
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Dear Mr. Fay
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SUBJECT:
ELECTRICAL DISTRIBUTION SYSTEM FUNCTIONAL INSPECTION AT
POINT BEACH NUCLEAR PLANT, UNITS 1 AND 2; REPORT NUMBER
50-266/90-201 AND 50-301/90-201
We are forwarding)the report of the electrical distribution system functional
inspection (EDSFI
conducted by the NRC Office of Nuclear Reactor Regulation
during March 12 through 16 and March 26 through April 6, 1990. This EDSF1 was
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one of several pilot inspections performed in accordance with an NRC Inspection
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Manual draft temporary instruction entitled " Electrical Distribution System
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Functional Inspection." The inspection team consisted of NRC Heacquarters and
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Region 111 personnel and five consultants.
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The inspection was performed to determine whether the electrical distribution
system as designed installed, and ' configured at i'oint Beach Nuclear Plant,
Units 1and2,wouldbecapableofperformingitsintendedsafetyfunctions.
During the inspection, the team r6 viewed available calculations and supporting
documents for this system at your Nuclear Power Department offices in Milwaukee
and at the Point Beach plant and conducted system walkdown inspections. The
team also reviewed other activities associated with the electrical distribution
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system at the Point Beach plant.
The team identified weaknesses regarding the functionality of your electrical
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systems. The three issues that raised the most concern were (1) apparent
emergency diesel generator (EDG) loading exceeding the EDG ratings under
(2) portions of the EDG fuel oil system were not
certainaccidentscenarios(3) safety-relatedcableswereroutedinthesame
seismically designed, and
raceways as were cables of the redundant division. These three issues and a
number of significant team findings were discussed during the exit meeting,
which was held at Wisconsin Electric Power Company's Milwaukee offices on
April 17, 1990. During that meeting, WEPC0 discussed the actions it had taken
insnediately following the inspection to resolve many of the findings.
By means
of reviews, evaluations, and system modifications, WEPC0 alleviated the NRC's
immeciate operability concerns for the three major issues.
As a result of the inspection, the team identified four general areas of weak-
nesses and numerous technical deficiencies. The areas of weaknesses the team
identified were (1) design and modification deficiencies in the EDG and 125-Vdc
systems (2) lack of available design and engineering information, (3) design
features where a single failure can disable redundant equipment, and
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(4) engineering support that did not fully evaluate design or changes to
design.
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Mr. C. W. Fay
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June 1, 1990
While planning corrective actions based on the weaknesses identified in the
enclosed report, it is important that you realize that the focus of this
inspection was only on the electrical systems. Therefore, consideration
should be given to identifying and correcting similar problems in other
safety-related systems. Given the nature and importance of our inspection
findings, we expect to closely follow these and other corrective actions you
may take to assure improvement is sustained.
We recognize that you have already taken or plan to take corrective actions
relating to several of our concerns including undertaking a design basis
reconstitution effort, installing an additional emergency diesel generator, and
hiring additional engineering support staff. You have initiated nodifications
to electrical distribution systems, such as separation of offsite power sup-
plies to address weaknesses identifico in your own reviews. We have received
your letter of May 10, 1990, which reflects the information presented at the
April 17, 1990 exit meeting, describing steps you have taken or plan to take to
address the inspection findings presented at our exit neeting.
Any enforcement actions that result from this inspection will be forwarded by
the NRC Region 111 office under separate cover.
>
In accordance with 10 CFR 2.790 of the Commission's regulations, a copy of this
letter and the enclosure noted below will be placed in the NRC Public Document
Room.
Please respond to this office within 60 days to inform us of the date that
actions taken related to the items identified in the enclosed inspection
report will be completed for possible followup inspection.
Should you have any
questions concerning this inspection, please contact the NRR Project Manager,
Warren Swenson, at (301) 492-1386, or the inspection team leader,
StevenR. Stein,at(301)492-0977.
Sincerely,
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Original signed by:
Gary M. Holahan, Acting Director
Division of Reactor Projects 111/lV/V
and Special Projects
Office of Nuclear Reactor Regulation
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Enclosure:
NRC Inspection Report 50-266
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and 50-301/90-201
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cc w/ enclosure: See page 4
Distribution:
See page 3
- see previous concurrence
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Mr. C.~W. Fay.
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~ June 1, 1990
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Distr'bstion:..s .,
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pocken. riles-50-266 andl50-301?
RSIB R/F
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TEMurley, NRR
- FJMiraglia, NRR
WTRussell, NRR
RKGrimes, NRR
HArAming, NRR
d'<.t:".irie , NRR
SKStein, NRR
GMHolahan, NRR-
WHSwenson, NRR
JAZwolinski, NRR
JNHannon, NRR
JEDyer, EDO
RLSpessard. AE0D
CVanderniet, SRI Point Beach
- Regional Administrators
Regional Division Directors
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Inspection Team
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Mr.-C. W. Fay ~
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' Point Beach Nuclear Plant
Wisconsin- Electric Power Company.
Units 1-and 2
cc:
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- Ernest L. Blake, Jr.
Shaw, Pittman, Potts and Trowbridge
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2300 N Street,'N.W.
Washington, DC 20037
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Mr. James J. Zach, Manager
- Point Beach Nuclear Plant
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- Wisconsin Electric Power Company
6610 Nuclear Road
Two Rivers, Wisconsin 54241
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Town Chairman
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- Town of Two Creeks
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Route 3
Two Rivers, Wisconsin 54241
Chairman
Public Service Commission
of Wisconsin
,
Hills Farms State Office Building
Madison, Wisconsin 53702
Regional Administrator, Region 111
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U.S; Nuclear Regulatory Commission -
Office of Executive Director
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for Operations
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799 Roosevelt Road-
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- Sesider; Inspector's Office
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U.S. Uedeur Regulatory Comission
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00<.2 4de' ear Road
it.9 #tvara, Wisconsin 54241
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