ML18153B918

Responds to NRC Bulletin 88-010 & Suppl 1, Nonconforming Molded Case Circuit Breakers.

ML18153B918
Person / Time
Site:	Surry
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)

Text

e _e VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 September 29, 1989 U.S. Nuclear Regulatory Commission Serial No.: 88-788E Attn: Document Control Desk SPS/GDM:pmk Washington, D.C. 20555 Docket*Nos.: 80-280_

80-281 License Nos: DPR-32 DPR-37 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 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 s next refueling outage.

1 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 l -- \

• -, I 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

e COMMONWEALTH OF VIRGINIA* )

)

COUNTY OF HENRICO )

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 o f ~ , 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

1. 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.

• INSTALLED NONTRACEABLE MCCBs SATISFACTORILY TESTED TO NRCB 88-10 TESTING REQUIREMENTS ,

Item No. Manufacturer Model No. Installed Location Probable Procurement Chain*

.e

1. 2 Westinghouse EHB2020 EOG Control Panel Electrical Suppliers, Inc.

( DC IA CKTll)

(DC 2A CKT6)

2. t'.. Westinghouse HFC3070 Alternate Power Supply Electrical Suppliers, Inc.

for Semi-Vital Bus from Cutler-Hammer from (lHl-1211; 2Hl-1211) Westinghouse

3. 1 Westinghouse FB3015 Charging Pump Electrical Suppliers, Inc.

Suction Line MOV from Electrical Panelboard or (Ol-CH-MOV-1286A) Westinghouse

4. 2 Square D AIB120 Semi-Vital Bus Panel (16)-ECK Supply Co. from Square D (2SVB1-CKT-16, 26) (26)-Electrical Suppliers, Inc.

5.

• 1 Westinghouse FB3015 RX Side Fuel Assembly from Stock/Square D Electrical Suppliers, Inc. from e

Upender Cabinet Electrical Panel board or Westinghouse *

(02-FH-BKR-NA)

6. 1 Westinghouse FB3015 Heat Trace Panel #5 Electrical Suppliers, Inc. from (01-CH-HTT-CKT-2) Electrical Panel board or Westinghouse

7. 1 Square D QOB120 Heat Trace Panel 2A2 Electrical Suppliers, *inc. from*

(Ol-CH-HTT-CKT-36) Stock/Square D *

• The replacement MCCB was tested due to contamination of the installed breaker.

Item No. Manufacturer Model No. Installed Location Probable Procurement Chain

8. 1 Westinghouse JA3225W Emergency Switchgear WESCO from Westinghouse Room Ventilation.Equip.

(02-EP-BKR-143)

9. 2 Westinghouse KA3225 Control Room Ventilation Electrical Equipment Co. from Chillers (Ol-VS-E-48,C) Westinghouse

10. 1 Westinghouse EHB3070A Pressurizer Heater WESCO from Westinghouse (02-RC-BKR-44)

11. 1 Square D AIB215 Main Steam Trip Valve Electrical Suppliers, Inc.

(DC Panel 2-1-CKT-8) from Stock/Square D (02-EPD-PNL-2-1-8)

12. 1 Square D AIB220 (DC Panel 1-2-CKT-13) ECK Supply, Co. from Square D (01-EPD-BKR-PN-1-2)

'~*

13. 1 Westinghouse JA3150W Control Rod Drive WESCO from Westinghouse Mechanism Shroud Cool-ing Fan (l-VS-F-60C)

14. 1 Square D QOB120 Heat Trace Panel 2Al Electrical Suppl~ers, Inc.

(01-CH-HTT-2Al54) from Stock/Square D

15. 1 Square D QOB120 Heat Trace Panel 2B3 (02-CH-HTT-283-03)

Electrical Suppliers, Inc.

from Stock/Square D e

16. 1 Square D QOB120 Heat Trace Panel 281 Unknown (01-CH-HTT-281-16)

TOTAL MCCBs Tested - 20

• • Test results were determined to be satisfactory based on comparison with the manufacturer's breaker test curve.

e ATTACHMENT 2

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

• AIB20AMP 02-EPL-LF-CONT (Light Fixture)

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 No. Manufacturer Model No. Installed Location Probable Procurement Chain

9. 1 Westinghouse JA3225W Emergency Switchgear WESCO from Westinghouse R6om Ventilation Equip~

(02-EP-BKR-143)

10. 2 Westinghouse KA3225 Control Room Ventilation Electrical Equipme~t Co. from Chillers (Ol-VS-E-4B,C) Westinghouse

11. 1 Westinghouse EHB3070/\ Pressurizer Heater (02-RC-BKR-44)

WESCO from Westinghouse e

12. , 1 Square D AIB215 Main Steam Trip Valve Elettrical Suppliers, Int.

(DC Panel 2-1-CKT-8) from Stock/Square D (02-EPD-PNL-2-1-8)

13. 1 Square D AIB220 (DC Panel 1-2-CKT-13) ECK Supply Co. from Square D (01-EPD-BKR-PN-1-2)

14. 1 Westinghouse JA3150W Control Rod Drive WESCO from Westinghouse Mechanism Shroud Cool-ing Fan (1-VS-F~60C)

15. 1 Square, D QOB120 Heat Trace Panel 2Al Electrical Suppliers, Inc.

(01-CH-HTT-2A154) from Stock/Square D 16.** 1 Square D QOB120

• Heat Tra~e Panel 2B3 Electrical Suppliers, Inc.

. (02-CH-HTT-283-03)

• from Stock/Square D 17.** 1 Square D QOB120 Heat Trace Panel 281 Unknown (01-CH-HTT-2Bl-16)

18.

• 6 -Westinghouse (1) Five Star Motor Control Center w/ Public Service of Indiana 480V MCC (6) 20 AMP Breakers from Westinghouse

( 6) HFB 20A (DCP 88-33)

Notes:

• Traceable

• • Installed after 8/88

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

21.

• 9 15 6

1 Westinghouse Westinghouse WE;stinghouse Westinghouse HFB2050 HFB2030 HFB2020 JD3200 Alternate Power Supply to 1-VS-E-48 Westinghouse Spectrum Technologies from Westinghouse Total: Nontraceable - 20 Traceable - 60 TOTAL NUMBER: 80 Note:

• Traceable e