ML20070E587
| ML20070E587 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 07/08/1994 |
| From: | Powers K TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-90-001, IEB-90-1, TAC-M85442, TAC-M85443, NUDOCS 9407150203 | |
| Download: ML20070E587 (2) | |
Text
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Ken Powers we rww. snr,yan taxw, plan.
July 8, 1994 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:
In the Matter of
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Docket Nos. 50-327 Tennessee Valley Authority
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50-328 SEQUOYAH NUCLEAR PLANT (SQN) - NRC BULLETIN 90-01, SUPPLEMENT 1 - LOSS OF FILL-0IL IN TRANSMITTERS MANUFACTURED BY ROSEMOUNT, VERBAL REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. 85442 AND 85443)
References:
1.
TVA letter to NRC dated March 15, 1994, "Sequoyah Nuclear Plant (SQN) - NRC Bulletin 90-01, Supplement 1 - Loss of Fill-011 in Transmitters Manufactured by Rosemount, Verbal Request for Additional Information (TAC Nos. 85442 And 85443)"
2.
'IVA letter to NRC dated July 13, 1990, "Sequoyah Nuclear Plant (SQN) - NRC Bulletin 90 Loss of Fill-011 in Transmitters Manufactured by Rosemount" Reference 1 provided additional information in regard to TVA's trending program, which is being used to meet the enhanced surveillance program required in NRC Bulletin 90-01.
Reference 1 also stated that TVA will delete six Rosemount transmitters from the trending program in accordance with guidance provided in Supplement 1 of NRC Bulletin 90-01.
NRC has requested confirmation that, for the deleted transmitters, TVA has a high degree of confidence that failures from loss of fill-oil will be detected and a high degree of reliability is maintained for the function consistent with its safety significance.
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U.S. Nuclear Regulatory Commission Page 2 July 8, 1994 L
In Reference 2, SQN committed to " Revise procedures by adding steps and/or precautions to ensure appropriate personnel are aware of the loss of fill-oil issue and the need for additional management review if a Rosemount transmitter is discovered outside the normal drift tolerance."
l The appropriate procedures presently contain the information discussed in this commitment for the Rosemount transmitters listed in Reference 2.
TVA believes that maintenance of this commitment will maintain a high degree of confidence for detecting failure of these transmitters caused by a loss of fill-oil.
In addition, in accordance with TVA's maintenance practice, j
a high degree of reliability will be maintained for the transmitter's function consistent with its safety significance.
There are no new commitments as a result of this letter.
Please direct questions concerning this issue to W. C. Ludwig at (615) 843-7460.
Sincerel,
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en Psowers cc:
Mr. D. E. LaBarge, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 NRC Resident Inspector i
Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323-2711 t
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