ML20216E439
| ML20216E439 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 03/12/1998 |
| From: | Grant G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wadley M NORTHERN STATES POWER CO. |
| Shared Package | |
| ML20216E445 | List: |
| References | |
| 50-282-98-03, 50-282-98-3, 50-306-98-03, 50-306-98-3, NUDOCS 9803180051 | |
| Download: ML20216E439 (3) | |
See also: IR 05000282/1998003
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NUCLEAR RECULATORY COMMISSION
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March 12, 1998
Mr. M. Wadley, Vice President
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Nuclear Generation
Northem States Power Company
414 Nicollet Mall
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Minneapolis, MN 55401
SUBJECT:
NRC NOTICE OF VIOLATION AND INSPECTION REPORT
NO. 50-282/96003(DRP); 50-306/g8003(DRP) FOR PRAIRIE ISLAND
NUCLEAR GENERATING PLANT
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Dear Mr. Wadley:
On February 24,1998, the NRC completed an inspection at your Prairie Island Nuclear
Generating Plant. The enclosed report presents the results of that inspection.
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During the six-week period covered by this inspection, continued improvements were noted in
procedure adherence by operators, in addition, operators exhibited improvements in control
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room access management, communications, and professionalism. A reactor coolant system
leak on Unit 2 was rapidly identified and conservative action was taken to shut down for repairs.
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The shutdown and outage operations activities were conducted well. Although compensatory
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actions for additional leak monitoring on Unit 1 were slow to be established, once started, they
were comprehensive. Removal, nondestructive examination, and repair activities associated
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with the Unit 2 leak from the partial length control rod drive mechanism were managed by a
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station task force and were conducted well. Effective radiation control practices were used to
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maintain reasonably low doses during the project. Also, during the inspection period, the backlog
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of maintenance work orders, control room deficiencies, and temporary modifications were very
low indicating a strong maintenance program which was receiving suitable management
attention.
Prompted by NRC concems, your staff conducted special control room ventilation testing, and as
a result, determined that in-leakage of both steam and airbome radioactivity during accidents
could have been greater than design assumptions, indicating a need for additional work to
resolve the issues. In addition, an inadequate review of breaker protection logic by a system
engineer led to an inappropriately sequenced work order and resulted in an engineered safety
feature system actuation and a violation of NRC sequirements. This was the fourth documented
case in a little over a year in which an inadequr.te review of logic circuits led to problems during
maintenance or testing activities.
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The violation identified above is cited in the ernlosed Notice of Violation (Notice), and the
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circumstances surrounding the violation are dercribed in detailin the enclosed report. Please
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note that you are required to respond to this letter and should follow the instructions specified in
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the enclosed Notice when preparing your response. The NRC will use your response, in part, to
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determine whether further enforcemerit action is necessary to ensure compliance with regulatory
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requirements.
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. M. Wadley
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in accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter, its
enclosures, and your response will be placed in the NRC Public Document Room.
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Sincerely,
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Geoffrey E. Grant, Director
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Division of Reactor Projects
Docket Nos.: 50 282; 50-306
Enclosures:
1.
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2.
Inspection Report
No. 50-282/98003(DRP);
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50-306/98003(DRP)
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cc w/encis:
Plant Manager, Prairie Island
John W. Forman, Ph.D.,
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Nuclear Engineer, MPCA
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State Liaison Officer, State
of Minnesota
State Liaison Officer, State
of Wisconsin
Tribal Council
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Prairie Island Dakota Community
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M. Wadley
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in accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter, its
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enclosures, and your response will be placed in the NRC Public Document Room.
Sincerely,
,
s/ Marc L. Dapas for
Geoffrey E. Grant, Director
Division of Reactor Projects
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Docket Nos.: 50-282; 50-306
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Enclosures:
1.
2.
Inspection Report
No. 50-282/98003(DRP);
50-306/98003(DRP)
cc w/encis:
Plant Manager, Prairie Island
John W. Ferman, Ph.D.,
Nuclear Engineer, MPCA
State Liaison Officer,
State of Minnesota
State Liaison Officer,
State of Wisconsin
Tribal Council
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Prairie Island Dakota Community
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Distribution:
Docket File w/encls
Rill PRR w/encls
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PUBLIC IE-01 w/encls
Prairie Island PM, NRR w/encls
SRI Prairie Island w/encls
IEO (E-mail)
Rill Enf. Coordinator w/encls
A. B. Beach w/encls
Deputy RA w/encls
DRS (2) w/encls
DOCDESK (E-mail)
TSS w/encls
DRP w/encls
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DATE
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03!nJ98
03//2/98
OFFICIAL RECORD COPY