ML20214H396
| ML20214H396 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/14/1986 |
| From: | Mason C TENNESSEE VALLEY AUTHORITY |
| To: | Taylor J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| REF-PT21-86, REF-PT21-86-342-000, REF-PT21-86-369-000 PT21-86-342, PT21-86-342-000, PT21-86-369, PT21-86-369-000, NUDOCS 8611260393 | |
| Download: ML20214H396 (3) | |
Text
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h TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374C1 6N 38A Lookout Place November 17, 1986 Mr. James M. Taylor, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 l
Dear Mr. Taylor:
SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 - DOCKET NOS. 50-327 AND 50-328 -
FACILI**Y OPERATING LICENSES DPR 72 AND 77 - PART 21 REPORT ON BUSSMAN MIS-5 ACTUATINC FUSES Pleaac rcfer to my letter to you dated October 29, 1986 concerning a Part 21 report on the above subject. The resistance value stated on page 2' of the report should be 55 to f5 milli-ohms. A corrected page 2 is enclosed.
Very truly yours, TENNESSEE VALLEY AUTHORITY C. C. Mason Acting Manager of Nuclear Power Enclosure cc (Enclosure):
Mr. Hugh Thompson, Director Division of PWR Licensing - A U.S. Nuclear Regulatory Comission l
Washington, D.C.
20555 Mr. E. L. Jordon Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
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8611260393 861117 PDR ADOCK 0500 7
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An Equal Opportunity Employer g
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- Mr. James M. Taylor November 17, 1986 cc:
Mr. Robert L. Baer Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 U.S. Nuclear Regulatory Commission Resion II ATTN:
Dr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. Carl Stahle Sequoyah Project Manager U.S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 U.S. Nuclear Regulatory Commission Region II ATTN:
Mr. G. G. Zech, Director TVA Projects 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 y
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Corrective Action and Recurrence Control Taken or To Be Taken The immediate corrective action is to test all MIS-5 fuses required to maintain operability in Mode 5.
This test will ensure no defective fuses are contained in these circuits. Capability of conclusive testing has been ensured by Bussman Manufacturing. This test consists of either a resistivity measurement or an amperage measurement to determine operability. The acceptance criteria for the operability check is a resistance of 55 to 65 milli-ohn:s or successfully passing a current of one ampere.
Long-term corrective action will be based on the cause of the defect which is currently under evaluation by Bussman Manufacturing.
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