ML20205T178
| ML20205T178 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/07/1988 |
| From: | Partlow J NRC OFFICE OF SPECIAL PROJECTS |
| To: | White S TENNESSEE VALLEY AUTHORITY |
| References | |
| CAL, TAC-60081, TAC-60409, NUDOCS 8811140160 | |
| Download: ML20205T178 (3) | |
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UNITED STATES 8
f, NUCLEAR REGULATORY COMMISSION 1
WASHINGTCN D. C. 20$55 November 7, 1938 Docket No. 50-327 Mr. S. A. White Senior Vice President, Nuclear Power Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37407.-2801
Dear Mr. White:
SUBJECT:
CONFIRMATORY LETTER ON AUTHORIZATION FOR RESTART AND POWER ESCALATION OF UNIT 1 - SEQUOYAH NUCLEAR PLANT, UNIT 1 (TAC 60081, 60409)
By letter dated November 4, 1988 you provided the staff with the Tennessee Valley Authority (TVA) plan for the power escalation of Unit I during the restart of the unit from the current extended outage.
This plan describes the initial operation of Unit 1 at various power levels with the five identified unit deficiencies.
These deficiencies are the follcwing:
(1) reactor vetsel flange inner 0-ring seal seepage, (?) emergency diesel generator with failed load sensor card, (3) pressurizer safety valve seepage, (4) steam generator Pain steam safety valves seepage and (5) main stean system steam dump valve seepage.
These deficiencies have been evaluated by TVA with the conclusion that it is safe for Unit 1 to restart with these deficiencies.
In your letter, you stated that the reactor vessel flange inner 0-ring seal seepage is acceptable for the upcoming Unit 1, Cycle 4 power operation.
The Unit 1. Cycle 4 refueling outage, when the 0-ring seal would be repaired, is scheduled for early 1990.
The repairs-for the failed load sensor card will be made during the upcoming diesel generator outage scheduled for the week i
of November 28, 1988.
If the pressurizer safety valve seepace has not stopped, Unit I will be shut down af ter operating in Mode 1 for a maximum of 21 days.
At the present schedule, this would be November 30, 1988.
You further state' that, in the event that linit I has to shut down to cold shutdown during the power ascension in this restart, the three deficiencies listed above, Items (3) to (5), on valve seepage will be repaired before resumina power operation.
We have evaluated your letter and have discussed it with your staff by telephone on November 4 and 5, 1988.
The reports docue.entinq the evaluations by TVA of the deficiencies have been reviewed by the NRC staff.
We conclude that the plan for the power escalation of Unit I with these deficiencies and the evaluations of the safety significance of the deficiencies for power escalation are acceptable for Unit I to restart at this time fron the current outage.
Therefore, by telephone on November 5, 1988. I.9uthorized Unit 1 8911140160 SG1107
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a Mr. S. A. White November 7, 1988 to enter Mode 2.
The NRC holdpoints at 30% and 75% power remain in effect. As we agreed, the NRC holdpoint at Mode 2 will be reinstated prior to your return to operation following a shutdown to effect repairs of the items discussed above.
If you have any questions concerr.;ng this letter, please contact J. Donohew, Sequoyah Nuclear Plant Project Manager at 301-492-0704.
Sincerely, Original Signed by Steven D. Richardson for James G. Partlow, Director Office of Special Projects cc: See next page Distribution "Docket File
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,Mr. S. A. White Senuoyah Nuclear Plant cc:
General Counsel Regional Administrator, Region II Tennessee Valley Authority U.S. Nuclear Regulatory Commission 200 West Summit Hill Drive 101 Marietta Street, N.W.
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Eli B33 Atlanta, Georgia 30323 Knoxville, Tennessee 37902 Pesident Inspector /Sequoyah NP Mr. R. L. Gridley c/o U.S. Nuclear Regulatory Commission Tennessee Valley Authority 2600 Igou Ferry Road SN 157R Lookout Place Soddy Daisy, Tennessee 37379 Chattanooga, Tennessee 37402-2801 Mr. John T. LaPoint Mr. Michael H. Mobley, Director Tennessee Valley Authority Division of Radiological Health Sequoyah Nuclear Plant T.E.R.R.A. Building, 6th Floor P.O. Box 2000 150 9th Avenue North Soddy Daisy Tennessee 37379 Nashville, Tennessee 37219-5404 Mr. M. Ray Dr. Henry Myers, Science Advisor Tennessee Valley Authority Committee on Interior Sequoyah Nuclear Plant and Insular Affairs 1
P.O. Box 2000 U.S. House of Representatives i
Soddy Daisy, Tennessee 37379 Washington. 0.C.
20515 Mr. D. L. Williams Tennesser> Valley Authority Tennessee Valley Authority Rockville Office 400 Vest Summit Hill Drive 11921 Pnckville Pike W10 R85 Suite 402 Knoxville, Tennessee 37902 Rockville, Maryland 20852 County Judge Hamilton County Courthouse i
Chattenooga, Tennessee 37402 i
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