IR 05000327/1993011
| ML20045H890 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 06/18/1993 |
| From: | Gibson A NRC Office of Inspection & Enforcement (IE Region II) |
| To: | Medford M Tennessee Valley Authority |
| References | |
| NUDOCS 9307220078 | |
| Download: ML20045H890 (3) | |
Text
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t June 18, 1993
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Docket Nos. 50-327, 50-328 License Nos. DPR-77, DPR-79 t
Tennessee Valley Authority ATTN:
Dr. Mark 0. Medford Vice President, Technical Support 3B Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Gentlemen:
SUBJECT: NRC INSPECTION REPORT NOS. 50-327/93-11 AND 50-328/93-11 Thank you for your response of May 24, 1993, to our Notice of Violation issued on April 3, 1993, concerning activities conducted at your Sequoyah facility.
After careful consideration of the bases for your denial of the violation, we have reached the following conclusions:
1)
Upon discovery of the Intermediate Range Monitor's trip.setpoint being above allowable limits, your staff took the appropriate corrective actions for the inoperable instrument.
2)'
Setpoint drift and calculational error contributed to the out of tolerance condition of the instrument.
Because the drift could have occurred after reactor mode changes were made, we do not believe the
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event was reportable.
Therefore, we have concluded that there is no substantive evidence of a
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violation and the violation will be withdrawn.
However, you also claimed the Technical Specification allowable value was not exceeded because the difference between the nominal trip setpoint and the allowable value is only based on rack error terms. We disagree with this evaluation. After further discussions with your staff, we have agreed that if the setpoint of an instrument is not found to be within Technical Specifica-tion tolerance for any reason that it will be declared inoperable and the appropriate action statements followed.
We appreciate your cooperation in this matter.
Sincerely, (0RIGINAL SIGNED BY A. F. GIBSON)
Albert F. Gibson, Director Division of Reactor Safety cc:
(See page 2)
9307220070 930619~~
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Tennessee Valley Authority
'2 June 18, 1993 cc:
W. H. Kennoy, Director Tennessee Valley Authority ET 12A 400 West Summit Hill Drive Knoxville, TN 37902 R. M. Eytchison, Vice President Nuclear Operations Tennessee Valley Authority 3B Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 B. S. Schofield, Manager Nuclear Licensing and Regulatory Affairs Tennessee Valley Authority SB Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Robert A. Fenech, Vice President Sequoyah Nuclear Plant Tennessee Valley Authority P. O. 30x 2000 Soddy-Daisy,'TN 37379 TVA Representative Tennessee Valley Authority Rockville Office 11921 Rockville Pike Suite 402 Rockville, MD 20852 Ralph H. Shell Site Licensing Manager Sequoyah Nuclear Plant P. O. Box 2000 Soddy-Daisy, TN 37379 Michael H. Mobley, Director Division of Radiological Health 3rd Floor, L and C Annex 401 Church Street Nashville, TN 37243-1532 (cc cont'd --See page 3)
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Ter.nsssee Valley Authority
June 18, 1993 r
General Counsel Tennessee Valley Authority ET IIH 400 West Summit Hill Drive Knoxville, TN 37902 County Judge Hamilton County Courthouse Chattanooga, TN 37402 bcc: E. Merschoff, RII J. Johnson, RII P. J. Kellogg, RII S. E. Sparks, RII S. J. Vias, RII B. Bordenick, 0GC D. E. LaBarge, NRR Document Control Desk NRC Resident Inspector U.S. Nuclear Regulatory Commission 2600 Igou Ferry Soddy-Daisy, TN 37379
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