ML20245B677
| ML20245B677 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/18/1989 |
| From: | Fox C TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-88-001, IEB-88-1, NUDOCS 8904260216 | |
| Download: ML20245B677 (8) | |
Text
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q TENNESSEE VALLEY AUTHORITY l
CH ATTANOOGA. TENNESSEE 37401 l-SN 1578 Lookout Place APR 181989-l l
U.S. Nuclear Regulatory Commission ATTN: Document Control-Desk
.Hashington, D.C.
20555 Gentlemen:
In the Matter of
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Docket No. 50-328 Tennessee. Valley Authortty
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SEQUOYAH NUCLEAR PLANT.(SQN) UNIT 2 - NRC BULLETIN NO. 88-01 INSPECTION RESULTS
References:
1.
NRC Bulletin No. 88-01: Defects in Westinghouse Circuit Breakers, dated February 5, 1988 2.
TVA letter to NRC dated February 27, 1988, "Sequoyah Nuclear Plant (SQN) - NRC Bulletin Number 88-01: Defects in Westinghouse Circuit Breakers" 3.
TVA letter to NRC dated September 26, 1988, "Sequoyah Nuclear Plant (SQN) Unit 1 - NRC Bulletin (NRCB) No. 88-01 Inspection Results" This letter provides NRC with the inspection results of SQN unit 2 Westinghouse Electric Corporation (H) breaker models DS-206 and DS-416 used in class IE applications as required by reference 1.
TVA's commitment to inspect the breakers identified in enclosure 2 of reference 3 and the breakers identified in enclosure 1 of reference 2 (not previously reported as completed) is now complete.
Reporting of these inspection results and replacement of the pole shafts listed in enclosure I complete the actions required by the subject bulletin for SQN.
Also, in enclosure 2 of reference 3 the first breaker identification number was listed as SQN-0-BCTB-067-0270-B.
The last letter in this breaker identifier number should be corrected from a B to an A. contains a list of the final 37 breakers inspected, the breaker model number, and the affected equipment identification. provides a breakdown of the total number of each type of breaker inspected (DS-206 and DS-416), the number that passed the inspection criteria as outlined in reference 1, and the number of pole shafts installed or repaired.
None of the breakers inspected required corrective actions because of mechanism alignments not meeting the acceptance criteria as discussed in the subject bulletin.
N wun m%e
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a An Equal opportunity Employer
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. APR 181989 U.S. Nuclear Regulatory Commission SQN has completed the actions required and reporting requirements in accordance with the subject bulletin for all DS-206 and 05-416 breakers identified in both references 2 and 3.
However, SQN does intend to inspect all DS-206 and DS-416 breakers in the class lE boards currently being maintained as spare breakers.
These inspections will be completed before nuclear startup (mode 2) following the unit 2 cycle 4 refueling outage.
If there are any questions regarding the information provided in this letter, please call B. S. Schofield at (615) 843-6172.
A summary statement of the commitments contained in this letter is included in enclosure 3.
A ORITY
. Fo,
., V ce President and Nuclear Techni al Director Sworn tggday of CCMJbd subscAibed bpfore me this /5 -
,1989 Y
Notary Public MyCommissionExpiresM-2 Enclosures cc (Enclosures):
Ms. S. C. Black, Assistant Director for Projects TVA' Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Ms. L. J. Watson, Acting Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NH, Suite 2900 Atlanta, Georgia 30323 l
Sequoyah Resident Inspector j
Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379
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ENCLOSURE 1 BREAKERS LISTED BELOW REQUIRE PERFORMANCE OF SMI-0-317-078 DURING UNIT 2 CYCLE 3 REFUELING OUTAGE 480-VOLT (V) SHUTDOWN BOARD 1Al-A BREAKER TYPE BREAKER IDENTIFICATION LOAD DS-416 SQN-1-BCTB-030-0103 AUX BLDG GENERAL SUPPLY FAN 1A 480-V SHUTDOWN BOARD 181-B BREAKER TYPE BREAKER IDENTIFICATION LOAD 0S-206 SQN-1-BCTB-062-0101 RECIPROCATING CHARGING PUMP 480-V SHUTDOWN BOARD 182-B
' BREAKER TYPE BREAKER IDENTIFICATION LOAD DS-416 SQN-1-BCTB-030-0162 AUX BLDG GENERAL EXHAUST FAN IB 05-206 SQN-0-BCTB-201-DM/4D EMERG FDR TO 480-V AUX BLDG COMMON BOARD (BUS A) i W.
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. 480-V SHUTDOWN BOARD 2Al-A
' BREAKER TYPE BREAKER IDENTIFICATION LOAD '
DS-206 SQN-2-BCTB-030-0083-A CRDM COOLER FAB 2A-A DS-206 SQN-2-BCTB-030-0074-A RX LWR COMPT COOLER FAN 2A-A DS-206 SQN-2-BCTB-201-DN/8B-A NOR FDR REACTOR MOV BD 2Al-A ALTN FDR REACTOR MOV BD 2A2-A 0S-206 SQN-2-BCTB-201-DN/9B-A NOR FDR. REACTOR VENT BD 2A-A ALTN FDR CONT & AUX BLDG VENT BD 2A2-A DS-206 SQN-2-BCTB-201-DN/108-A NOR FDR CONT & AUX BLDG VENT BD 2Al-A DS-206 SQN-2-BCTB-201-DN/11B-A NOR FDR 480-V DSL AUX BD 2Al-A ALTN FDR 480-V DSL AUX
' BD 2A2-A DS-206 SQN-0-BCTB-067-0270-A COOLING TOWER FAN A-A 480-V SHUTD0hN BOARD 2A2-A BREAKER TYPE BREAKER IDENTIFICATION LOAD DS-206 SQN-2-BCTB-201-D0/88-A ALTN FDR REACTOR MOV BD 2Al-A NOR FDR REACTOR M0V DB 2A2-A DS-206 SQN-2-BCTB-201-D0/98-A ALTN FDR CONT & AUX BLDG VENT BD 2Al-A DS-206 SQN-2-BCTB-201-D0/lDB-A ALT FDR 480-V REACTOR VENT BD 2A-A NOR FDR CONT & AUX BLOG VENT BD 2A2-A DS-206 SQN-0-BCTB-030-0136 FUEL HANDLING EXHAUST FAN A DS-206 SQN-2-BCTB-201-D0/ llc-A ALTN FDR 4EO-V DSL AUX BD 2Al-A NOR FDR 480-V DSL AUX BD 2A2-A DS-206 SQN-0-BCTB-067-0271-A COOLING TOWER FAN B-S (NORMAL FEED) i DS-206 SQN-0-BCTB-067-0272A COOLING TOWER FAN C-S (ALTERNATE FEED)
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- i 480-V SHUTDOWN BOARD 2B1-B BREAKER
' TYPE BREAKER IDENTIFICATION LOAD l
DS-206 SQN-2-BCTB-030-0092-B CRDM COOLER FAN 28-8 DS-206 SQN-2-BCTB-070-0033-B COMPONENT CLG SYS~PMP 2B-B
/
DS-206 SQN-2-BCTB-062-0101 RECIPROCATING CHARGING PUMP DS-206 SQii-2-BCTB-201-DP/88-B NOR'FDR REACTOR MOV BD 281-B ALTN FDR REACTOR MOV BD 282-8 DS-206 SQN-2-BCTB-247-DP/80-8 STANDBY LTG CAB NO. 3 XFMR DS-206 SQN-2-BCTB-201-DP/9B-B NOR FDR REACTOR VENT BD 28-B ALTN FDR CONT & AUX BLDG VENT BD 2B2-8 DS-206 SQN-2-BCTB-201-DP/108-B NOR FDR CONT & AUX BLDG VENT BD 281-B DS-206 SQN-2-BCTB-201-DP/118-B ALTN.FDR 480-V.DSL AUX BD 282-B NOR FDR 480-V DSL AUX BD 281 05-206 SQN-0-BCTB-067-0271-B COOLING TOWER FAN B-S (ALTERNATE FEED)
DS-206 SQN-0-BCTB-067-0272-8 COOLING TOWER FAN C-S 480-V SHUTDOWN BOARD 2B2-B BREAKER TYPE BREAKER IDENTIFICATION LOAD DS-206 SQN-0-bCTB-313-0367-B SHUTDOWN BD RH AHU 2B-B DS-206 SQN-2-BCTB-030-0080-B CRDM COOLER FAN 20-8 DS-206 SQN-2-BCTB-303-DQ/4C-B UNIT 2 REACTOR BLDG CRANE DS-206 SQN-2-BCTB-201-DQ/8B-B NOR FDR REACTOR MOV BD 2B2-B ALTN FDR REACTOR MOV BD 281-B 05-206 SQN-2-BCTB-201-DQ/98-8 ALTN FDR CONT & AUX BLDG VENT BD 281-B W.
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-4 480-V SHUTDOWN BOARD 2B2-B (Cont'd)
BREAKER
. TYPE' BREAKER IDENTIFICATION LOAD' DS-206 SQN-2-BCTB-030-0039-B CONTAINMENT AIR RETURN FAN 28-B 05-206 SQN-2-BCTB-201-DQ/10B-B ALTN FDR 480-V REACTOR VENT-BD 28-B:NOR FDR CONT & AUX BLDG VENT:
BD 2B2-B DS-206 SQN-2-BCTB-0047-0061/1 MN TURBINE TURNING GEAR OIL PUMP
,DS-206 SQN-2-BCTB-201-DQ/11B-B ALTN FDR 480-V DSL~ AUX BD 2B1-B-NOR FDR 480-V DSL AUX BD 2B2-B
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ENCLOSURE 3 Commitment TVA will inspect and repair or replace the pole shafts on all DS-206 and D5-416 breakers that are being currently maintained as spare breakers in all
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class IE boards at SQN. This action will be completed before nuclear startup (mode 2) following the unit 2 cycle 4 refueling outage.
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