ML20154R947
| ML20154R947 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 09/26/1988 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-88-001, IEB-88-1, NUDOCS 8810040397 | |
| Download: ML20154R947 (5) | |
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TENNESSEE VALLEY AUTHORITY CHATTANOOGA TENNESSEE 37401 SN 1578 Lookout Place SEP 261988 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C.
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Gentlemen:
l In the Matter of
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Docket No. 50-327 l
Tennessee Valley Authority
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SEQUOYAH NUCLEAR PLANT (SQN) UNIT 1 - NRC BULLETIN (NRCB) NO. 88-01 i
INSPECTION RESULTS
Reference:
NRC Bulletin No. 88-01: Defects in Westinghouse Circuit Breakers, dated February 5, 1988 This letter provides NRC with the results of the inspections of SQN unit 1 Westinghouse Electric Corporation (H) breaker models05-206 and 416 used in class IE applications as required by NRCB 88-01 (reference letter).
The inspection of all breakers required for unit 1 operation used in class IE applications has been performed in accordance with the criteria provided by the referenced letter.
A total of 56 breakers was inspected. provides a breakdown of the total number of each type of breaker inspected (05-206 and -416),
the number that passed the inspection criteria as outilned in the l
reference letter, and the number of new pole shafts installed or repaired.
None of the breakers inspected required corrective actions because of mechanism alignments as provided in the subject bulletin.
There are a total of five breakers (05-206) that will rot be completed before unit I restart.
These breakers are removed from their respective I
breaker compartments as required by the 45N749 series of drawings and are not required for plant operation.
Inspections of these five remaining breakers will, however, be completed by the end of the unit 2 cycle 3 refueling outage. A Itst of these breakers is provided in enclosure 2.
The result: of these inspections will be provided in the SQN unit 2 NRCB 88-01 inspection results.
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An Equal opportunity Employer
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- U.S. Nuclear Regulatory Commission SEP 261988 Summary statements of commitments contained in this submittal are provided in enclosure 3.
Please direct questions concerning this issue to B. A. Kimsey at (615) 870-6847.
Very truly yours, TEN ESSEE EY AUTHORITY
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R. Gridley, Ma ager Nuclear Licensing and Regulatory Affairs Sworn to ar),d subscrit)ed Lefore me this.
Aday of 4/Ar 1988 Notary P My Commission Expires 7
d Enclosures cc (Enclosures):
Ms. S. C. Black, Assistant Director for Projects TVA Projects Olvision U.S. Nuclear Regulatory Commission One White Fitnt, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. F. R. McCoy, Assistant Olrector for Inspection Programs TVA Projects Olvision U.S. Nuclear Regulatory Comission kalon II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Sequoyah Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379
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ENCLOSuet 1 SON UNIT 1 FINAL STATUS $NEET AND INSPECTION RESULTS OF WESTINGN0USE ELECTRIC CDePotATION (W)05-206 AND 416 seEAKERS l
INSPECTIONS IN ACCDADANCE WI1N NAC SULLETIN NO. as-el Srtaker Total No.
Weld Nos. 2. 3. & 6 Wald Nos. 1. 4, 5. & 7 W Ener No. of New No. of No. of areakers Type DS Inspected Short-Tefle "aspections Long-Terie Inspections Weld Pole Shafts Pole Shafts under 6.2.2 6.1.1 No.
6.1.2 No.
7.1 No. Passed Evaluatton Installed Repaired Criteria Passed Passed 4IS 4
1 2
3 N/A 1
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206 52 1
33 27 N/A 14 38 e
Subtctal 56*
2 35 30 N/A 15 4e e
- Eight of these breakers (6 each D5-206 and 2 each D5-416) were reported in NaCB 88-81 inspection status letter dated May 26, 1984.
Therefore, a total of 48 breakers has been inspected since the aforementioned letter was sent to NAC.
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1 ENCLOSURE 2 i
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G BREAKER EQUIPMENT BREAXER H00EL IDENTIFICATION IDENTIFICAfION 05-206 Cooling Tower Fan A-A SQN-0-BCTB-067-0270-8 05-206 Cooling Tower Fan B-S SQN-0-BCTB-067-0271-A (normal feed)05-206 Cooling Tower Fan C-S SQN-0-BCTB-067-0272-A (alternate feed),
DS-206 Cooling Tower Fan B-S SQN-0-BCTB-067-01'.1-B (alternate feed) 0S-206
. Cooling Tower Fan C-S SQN-0-BCTB-067-0272-B NOTE:
The cooling tower fans are part of the Auxiliary Essential Raw Cooling Water (AERCH) system.
The AERCH system was removed from service with installation of the new ERCH system pumpin' station.
The above breakers will be uttilzed as spares after spection has been completed.
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ENCLOSURE 3 1.6 ' '
COMMI1 MENT LIST 1.
The five 05-206 breakers listed in enclosure 2 will be inspected in accordance with NRCB 88-01 requirements before startup following unit 2 cycle 3 refueling outage.
2.
The results of these inspections from 1 above will be included'in the'SQN unit 2 NRCB 88-01 results letter.
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