ML20236E997
| ML20236E997 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 06/25/1998 |
| From: | Grant G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wadley M NORTHERN STATES POWER CO. |
| Shared Package | |
| ML20236F000 | List: |
| References | |
| 50-263-98-07, 50-263-98-7, NUDOCS 9807010329 | |
| Download: ML20236E997 (2) | |
See also: IR 05000263/1998007
Text
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NUCLEAR REGULATORY COMMISSION
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UNITED STATES
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801 WARRENVILLE ROAD
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LISLE. ILLINOIS 60532-4351
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June 25, 1998
Mr. M. Wadley
Vice President
Nuclear Generation
Northem States Power Company
414 Nicollet Mall
Minneapolis, MN 55401
SUBJECT:
MONTICELLO INSPECTION REPORT 50-263/98007(DRP)
Dear Mr. Wadley:
On May 27,1998, the NRC completed an inspection at the Monticello reactor facility. The
enclosed report presents the results of that inspection.
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,
During the 6-week period covered by this inspection, the conduct of activities at the Monticello
facility was generally characterized by safety-conscious operations, sound engineering practices,
and careful radiological work controls. The reactor startup from the refueling outage was
conducted in a controlled and deliberate manner. The decision to delay the startup because of a
cracked contro; rod drive withdraw line reflected conservative, safety-conscious operation.
No violations were identified during this inspection. However, we are concerned that operations
personnel did not document in a condition report or in the control room log that a control room
manometer for the reactor building differential pressure was not operating properly. A work order
also was not initiated. Although venting the instrument line corrected the problem in the short
term, the root cause, a leak in the test connection, was not determined until the problem recurred
a few days later. Operators accepted the discrepant condition and did not aggressively pursue
,
resolution.
Also, the recombiner system was returned to service without completing a post-maintenance test
on newly installed switches. The system tripped about a week later during a train swapping
evolution because of miswiring of the switches. Although the switches were not safety-related,
this event is of concern since established controls for performing post-maintenance testing and
returning equipment to service were not effective.
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9807010329 980625
ADOCK 05000263
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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 and its
enclosure will be placed in the NRC Public Document Room.
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sincerely,
Original signed by M. Dapas for
Geoffrey E. Grant, Director
Division of Reactor Projects
Docket No.: 50-263
License No.: DPR-22
Enclosure:
Inspection Report 50-263/98007(DRP)
,
,
cc w/ encl:
Plant Manager, Monticello
State Liaison Officer, State
of Minnesota
' Distribution:
CAC (E-Mail)
Project Mgr., NRR w/enci
C. Paperiello, Rlli w/ encl
,
J. Caldwell, Rlli w/enci
B. Clayton, Rlll w/enct
SRI Monticello w/enci
DRP w/ enc!
TSS w/enci
DRS (2) w/enct
Rlli PRR w/ encl
!
PUBLIC IE-01 w/ encl
Docket File w/enci
GREENS
LEO (E-Mail)
DOCDESK (E-Mail)
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DOCUMENT NAME: G:\\MONT\\ MON 98007.DRP
.
To receive a copy of this docunwnt, indicate in the boa *C" = Copy without attachment / enclosure *E" = Copy with attachment / enclosure
{
- N' = No copy
OFFICE
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NAME
MKunowski:ml MK JMcC-B a Af( L GGrant/2:3DM
DATE
06/M/98
06/J5798
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0625/98
OFFICIAL RECORD COPY
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