ML18153B918

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Responds to NRC Bulletin 88-010 & Suppl 1, Nonconforming Molded Case Circuit Breakers.
ML18153B918
Person / Time
Site: Surry  Dominion icon.png
Issue date: 09/29/1989
From: Stewart W
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
IEB-88-010, IEB-88-10, NUDOCS 8910120057
Download: ML18153B918 (13)
v • d • e


Text

e _e VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 September 29, 1989 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555 Gentlemen:

VIRGINIA ELECTRIC ANO-POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 NRC BULLETIN 88-10 AND SUPPLEMENT 1 NONCONFORMING MOLDED CASE CIRCUIT BREAKERS Serial No.: SPS/GDM:pmk Docket*Nos.:

License Nos: 88-788E 80-280_ 80-281 DPR-32 DPR-37 Nontraceable molded case circuit breakers (MCCBs) installed in safety related systems have been tested in accordance with the subject bulletin criteria.

The test results are provided in Attachment

1. In addition, the NRC positions provided in Supplement 1 to the bulletin have been considered and addressed in this and earlier correspondence.

Prior to the issue of Supplement 1 to the bulletin, seven nontraceable MCCBs. were obtained from stock, satisfactorily tested, and issued for installation in the station. A list of these MCCBs and their installed locations is provided in Attachment

2. Since these breakers passed the bulletin testing criteria prior to install~tion, we considered them acceptable for use. However, the bulletin supplement considers nontraceable stock circuit breakers to be acceptable for use only as replacements for installed nontraceable MCCBs. Based ori. this position, we will replace these breakers with traceable MCCBs during each unit 1 s next refueling outage. Attachment 3 provides a revised listing of the nontraceable MCCBs installed in safety related systems that was previously provided in Table 2 of our letter dated June 22, 1989 (Serial No. 88-7880).

No additional MCCBs were identified; however, certain minor corrections to the table were incorporated.

A revised Table 2 is provided in its entirety with the corrections noted by revision bars in the margin. The information contained herein is true and accurate to the best of my knowledge.

If you require additional information, please contact us. Very truly yours, f ! *-, I . .:. -l --\ . ....__ -:: .. W. L. Stewart Senior Vice President

-Power -fP! / '(1 e cc: U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W. Suite 2900 Atlanta, Georgia 30323 Mr. W. E. Ho 11 and NRC Senior Resident Inspector Surry Power Station Mr. J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station COMMONWEAL TH OF VIRGINIA* ) ) COUNTY OF HENRICO ) e The foregoing

  • document was acknowledged before me, in _ and for the County* and Commonwealth aforesaid, today by W, L. Stewart who is Senior Vice President

-Power, of Virginia Electric and Power Company. He is duly authorized to execute and file the foregoing document in behalf of that Company, and the statements in the document are true to the best of his knowledge and belief.

  • Acknowledged before me this _f!l_ day of~, 1982._. My Commission Expires: ,~ 25'. , 1994 ... --~_:~~ Notary fu"tii{-(SEAL)

--ATTACHMENT 1

e e Nontraceable MCCB Testing Results As noted in our previous response dated June 22, 1989 (Serial No. 88-7880), we considered every safety related MCCB in stock to be nontraceable; consequently, we did not test these breakers.

However, the installed safety related MCCBs were reviewed for traceability and tested as appropriate.

The installed MCCBs identified as nontraceable were removed from their respective systems, tested for acceptability, and reinstalled.

A list of the tested breakers is provided in'the attached table. Every MCCB tested met the bulletin acceptance criteria with the exception of one breaker installed in a control rod drive mechanism shroud cooling fan circuit. This breaker tripped six minutes short of the two hour 100% hold-in test. However, an engineering evaluation of the test results plotted the test points obtained against the manufacturer's circuit breaker trip characteristic curve. This plot indicated the breaker test points were in agreement with the manufacturer's curve, and the ~reaker is operating within the proper design specifications.

Therefore, the breaker was considered acceptable for use and reinstalled.

One nontraceable MCCB installed in the reactor containment upender control cabinet could not be t~sted due to contamination.

Consequently, a nontraceable replacement MCCB was obtained from stock, tested satisfactorily to the bulletin test requirements, and installed in the cabinet. We had previously proposed testing the nontraceable in-stock MCCBs and considering

-them acceptable for use in the station, provided they satisfactorily passed the bulletin testing requirements.

However, NRC Position #5 in Supplement 1 to the bulletin restricts the use of the tested nontraceable MCCBs in stock: These MCCBs are limited to replacing only nontraceable installed breakers.

To ensure the nontraceable MCCBs in our warehouse are not used to replace installed traceable MCCBs, we are obsoleting and removing the MCCBs from station stock. They will be replaced with MCCBs procured from or directly traceable to a MCCB manufacturer with a 10CFR50 Appendix B program. If any in-stock breakers must be retained due to the unavailability of replacements due to redesign, etc., they will only be used as replacements for installed nontraceable MCCBs.

  • Item No. Manufacturer
1. 2 Westinghouse
2. ,., Westinghouse t'.. 3. 1 Westinghouse
4. 2 Square D
6. 1 Westinghouse
7. 1 Square D
  • The replacement MCCB was tested due INSTALLED NONTRACEABLE MCCBs SATISFACTORILY TESTED TO NRCB 88-10 TESTING REQUIREMENTS , Model No. Installed Location EHB2020 EOG Control Panel ( DC IA CKTll) (DC 2A CKT6) HFC3070 Alternate Power Supply for Semi-Vital Bus (lHl-1211; 2Hl-1211)

FB3015 Charging Pump Suction Line MOV (Ol-CH-MOV-1286A)

AIB120 Semi-Vital Bus Panel (2SVB1-CKT-16, 26) FB3015 RX Side Fuel Assembly Upender Cabinet (02-FH-BKR-NA)

FB3015 Heat Trace Panel #5 (01-CH-HTT-CKT-2)

QOB120 Heat Trace Panel 2A2 (Ol-CH-HTT-CKT-36) to contamination of the installed breaker. Probable Procurement Chain* .e Electrical Suppliers, Inc. Electrical Suppliers, Inc. from Cutler-Hammer from Westinghouse Electrical Suppliers, Inc. from Electrical Panelboard or Westinghouse (16)-ECK Supply Co. from Square D (26)-Electrical Suppliers, Inc. from Stock/Square D e Electrical Suppliers, Inc. from Electrical Panel board or Westinghouse

  • Electrical Suppliers, Inc. from Electrical Panel board or Westinghouse Electrical Suppliers, *inc. from* Stock/Square D
  • Item No. Manufacturer
8. 1 Westinghouse
9. 2 Westinghouse
10. 1 Westinghouse
11. 1 Square D 12. 1 Square D '~* 13. 1 Westinghouse
14. 1 Square D 15. 1 Square D 16. 1 Square D TOTAL MCCBs Tested -20 Model No. JA3225W KA3225 EHB3070A AIB215 AIB220 JA3150W QOB120 QOB120 QOB120 Installed Location Emergency Switchgear Room Ventilation.Equip.

(02-EP-BKR-143)

Control Room Ventilation Chillers (Ol-VS-E-48,C)

Pressurizer Heater (02-RC-BKR-44)

Main Steam Trip Valve (DC Panel 2-1-CKT-8)

(02-EPD-PNL-2-1-8) (DC Panel 1-2-CKT-13)

(01-EPD-BKR-PN-1-2)

Control Rod Drive Mechanism Shroud ing Fan (l-VS-F-60C)

Heat Trace Panel 2Al (01-CH-HTT-2Al54)

Heat Trace Panel 2B3 (02-CH-HTT-283-03)

Heat Trace Panel 281 (01-CH-HTT-281-16)

    • Test results were determined to be satisfactory based on comparison with the manufacturer's breaker test curve. Probable Procurement Chain WESCO from Westinghouse Electrical Equipment Co. from Westinghouse WESCO from Westinghouse Electrical Suppliers, Inc. from Stock/Square D ECK Supply, Co. from Square D WESCO from Westinghouse Electrical Suppl~ers, Inc. from Stock/Square D Electrical Suppliers, Inc. from Stock/Square D Unknown e e ATTACHMENT 2

Item Manufacturer 1 Westinghouse 2 Westinghouse 3 Westinghouse 4 Westinghouse 5 Westinghouse 6 Westinghouse 7 Square D In-stock Nontraceable MCCBs That Have Been Tested and Installed in Safety Related Systems Prior to Issue of Supplement I to NRCB 88-10 Model No. Ins ta 11 ed Location FB 3030 Annunciator Circuit Jn th~ #2 Generator Excitation Cabinet FB 3015 1-PG-MOV-107 A FB 3050 1-SI-MOV-18658 FB 3050 1-S I -MOV-1865C FB 3030 1-SI-MOV-1869A FB 3030 1-CH-MOV-12758

  • AIB20AMP 02-EPL-LF-CONT (Light Fixture) Emergency Diesel e ATTACHMENT 3 .,, ~I.

Table 2 (Ref. Letter dated June 22, 1989: Serial No .. 88-788D) INSTALLED NONTRACEABLE MCCBs Item No. Manufacturer Model No. Installed Location Probable Procurement Chain 1.

  • 16 Square D QlB2100VH Vital Bus Panels' 'Electrical Suppliers, Inc. Feeder Breakers from Square D (VBI-1,lA;l-4) (VBII-1,J.A;l-4)
2. 2 Westinghouse EHB2020 EOG Control Panel Electrical Suppliers, Inc. (DC 1A CKTll) (OC 2A CKT6) , 3. 2 ~/esti nghouse HFC3070 Alternate Power Supply Electrical Suppliers, Inc. for Semi-Vital Bus from Cutler Hammer from (lHl-1211; 2Hl-1211)

Westinghouse Ll. 1 Westinghouse FB3015 Charging Pump Electrical Suppliers, Inc. Suction Line MOV from Electrical Panelboard or (Ol-CH-MOV-1286A)

Westinghouse

5. 2 Square D AIB120 Semi-Vital Bus Panel (16)-ECK Supply Co. from Square D (2SVB1-CKT-16,26)

(26)-Electrical Suppliers, Ince from Stock/Square D 6. 1 Westinghouse FB3015 RX Side Fuel Assembly Electrical Suppliers, Inc. from Upender Cabinet Electrical Panelboard or (02-FH-BKR-NA)

Westinghouse

7. 1 Westinghouse FB3015 Heat Trace Panel #5 Electrical Suppliers, Inc. from (01-CH-HTT-CKT-2)

Electrical Panelboard or .. Westinghouse

8. 1 Square D QOB120 Heat Trace Panel 2A2 Electrical Suppliers, Inc. from (Ol-CH-HTT-CKT-36)

Stock/Square D

  • Traceable Item 9. 10. 11. 12. , 13. 14. 15. 16.** 17.** 18.
  • Notes: No. 1 2 1 1 1 1 1 1 1 6
    • Installed after 8/88 Model No. JA3225W KA3225 EHB3070/\

AIB215 AIB220 JA3150W QOB120 QOB120 QOB120 (1) Five Star 480V MCC ( 6) HFB 20A Installed Location Emergency Switchgear R6om Ventilation Equip~ (02-EP-BKR-143)

Control Room Ventilation Chillers (Ol-VS-E-4B,C)

Pressurizer Heater (02-RC-BKR-44)

Main Steam Trip Valve (DC Panel 2-1-CKT-8)

(02-EPD-PNL-2-1-8) (DC Panel 1-2-CKT-13)

(01-EPD-BKR-PN-1-2)

Control Rod Drive Mechanism Shroud ing Fan (1-VS-F~60C)

Heat Trace Panel 2Al (01-CH-HTT-2A154)

  • Heat Tra~e Panel 2B3 . (02-CH-HTT-283-03)

Motor Control Center w/ (6) 20 AMP Breakers (DCP 88-33) Probable Procurement Chain WESCO from Westinghouse Electrical Equipme~t Co. from Westinghouse WESCO from Westinghouse Elettrical Suppliers, Int. from Stock/Square D ECK Supply Co. from Square D WESCO from Westinghouse Electrical Suppliers, Inc. from Stock/Square D Electrical Suppliers, Inc. from Stock/Square D Unknown Public Service of Indiana from Westinghouse e

Item No. Manufacturer Model No. Installed Location Probable Procurement Chain 19.* 4 Westinghouse FD3150L EOG Excitation Bkr Spectrum Technologies from (EWR 88-578) Westinghouse 20.* 3 Westinghouse HFB2100 DC Panels 1A/2A Systems Control from 9 Westinghouse HFB2050 Westinghouse 15 Westinghouse HFB2030 --6 WE;stinghouse HFB2020 21.

-20 Traceable

-60 TOTAL NUMBER: 80 Note:

  • Traceable e
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