IR 05000338/1982007
| ML20054D829 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 04/01/1982 |
| From: | Dance H, Dante Johnson, Shymlock M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20054D826 | List: |
| References | |
| 50-338-82-07, 50-338-82-7, 50-339-82-07, 50-339-82-7, NUDOCS 8204230426 | |
| Download: ML20054D829 (4) | |
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UNITED STATES 8'
g NUCLEAR REGULATORY COMMISSION o
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E REGION 11
o 101 MARlETTA ST., N.W., SUITE 3100 ATLANTA, GEORGIA 30303 o
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Report Nos. 50-338/82-07 and 50-339/82-07 Licensee: Virginia Electric and Power Company P. O. Box 26666 Richmond, VA 23?51 Facility Name: florth Anna Units 1 and 2 Docket Nos. 50-338 and 50-339 License Nos. NPF-4 and NPF-7 Inspection at Nor Anna,. site near flineral, Virginia Inspectors:
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Date Signed Approved by:
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H. C. Dance, Section Chief, Division of Datd Signed Project and Resident Programs SUliMARY Inspection on February 6 - fiarch 5, 1982 Areas Inspected This routine, inspection by the resident inspector involved 106 inspector-hours on site in the areas of followup of previously identified items, licensee event reports, surveillance and maintenance activities, and plant operations.
Resul ts Of the five areas inspected, no violations or deviations were identified.
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DETAILS 1..
Persons Contacted
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Licensee Employees
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- W. R. Cartwright, Station Manager E. W. Harrell, Assistant Station Manager
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J. A. Hanson, Superintendent - Technical Services J. R. Harper, Superintendent - !!aintenance i
S. L. Harvey, Superintendent - Operations G. Paxton, Superintendent - Administrative Services J. M. Mosticone, Operations Coordinator R. A. Bergquist, Instrument Supervisor A. H._ Stafford, Health Physics Supervisor J. P. Smith, Engineering Supervisor
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F. Terminella, Engineering Supervisor P. T. Knutsen, Engineering Supervisor
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- J. R. Stratton, Mechanical flaintenance Supervisor
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D. E. Thomas, Electrical Supervisor
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A. L. Hogg, Jr., Site QC,ftanager
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E. Fellows, Staff Assistant K. A. Huf fman, Clerk Other licensee employees contacted included security force members and office personnel.
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- Attended one or more exit interview
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Exit Interview h
The inspection scope and findings were summarized on March 8,1982, 'with those persons indicated in paragraph 1 above.
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Licensee Action on Previous Inspection Findings
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Not inspected.
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Unresolved Items l
Unresolved items were not identified during this inspection ~.
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5.
Plant Status During this inspection period both units operated at or near capacity load with the following exceptions:
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Unit 1 At approximately 0400 on February 23, 1982, the unit gland exhaust fans tripped, and the gland exhaust condenser was flooded with water as.a result of a ruptured - tube. The main turbine was manually tripped to protect the turbine fran possible water damage. This resulted in an associated reactor trip. All feed and condensate was secured and condenser vacuum breakers opened.
The unit was maintained in a safe controlled shutdown mode by use of auxiliary feedwater and atmospheric steam dump.
The gland exhaust condenser tube was repaired the same day and,at approximately 2000, the unit was brought back to power.
Unit 2
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At 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> on February 21, 1982, an automatic reactor trip occurred due to a high negative flux rate signal on all four power range channels.
The trip occurred while corrective maintenance was being performed in the rod
control cabinet. When the technician replaced a faulty mutiplexing error
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detection card, the control rods in that group were released causing the
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All equipment and instrumentation functioned as
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required, all actions of EP-1 " Reactor Trip" procedure were completed.
At approximately 0800, when returning the unit back to power, a second reactor trip occurred due to a turbine trip.
The cause of the turbine trip i
was determined to be fran low pressure in the turbine hydraulic control (EliC) system. The. low pressure was a result of a loose nut on the feedback
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linkage on the governor valves.
The faulty linkage caused the governor valves to cycle excessively which created a large demand on the EHC system
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and subsequent low oil pressure.
Repairs were conducted on the affected linkage and the unit was returned to power at approximately 0900.
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Followup of Previously Identified Items i
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(Closed) IFI 339/81-27-03, Followup issuance of revised LER 81-071.
The revised LER was reviewed and more completely identified the
l problems. encountered with the hydraulic snubber. The inspector had no further questions relating to the contents of this LER.
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Licensee Event Report (LER) Followup The following LER's were reviesed and closed. The inspector verified that reporting requirements had been met, causes had been identified, corrective t
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actions appeared appropriate, generic applicability had been considered, and i
the LER fonas were complete. Additionally, for those reports identified by asterick, a more detailed review was informed to verify that the licensee had reviewed the event, corrective action had been taken, no unreviewed
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safety questions were involved, and no violations of regulations or Technical Specification conditions had been identified.
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338/82-003 Fire door between Rod Drive Room and the outside would not latch.
339/82-006 B' Quench Spray pump' suction valve was. removed from service
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to repair.
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Plant Operations The inspector kept informed on a daily basis of overall status of the plants and of any signif,1 cant safety matters related to plant operations.
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Discussions were held with plant management and various members of the
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operations staff on a regular basis.
Selected portions of daily operating logs and operating data sheets were reviewed daily during this report period.
The inspector conducted various plant tours and made frequent visits to the control room.
Observation included: witnessing work activities in
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progress, status of operating and standby safety systems, confirming valve positions, instrument readings, and readings, annunciator alarms, house-
keeping and vital area controls.
Informal discussions were held with operators and other personnel on work activities in progress and the status of safety-related equipment or
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systems.
No violations or deviations were identified.
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