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MONTHYEARML20235S2971987-10-0202 October 1987
Summary of 870923 Meeting W/Westinghouse Re Technical Basis for Westinghouse Recommended Actions,Criteria & Conclusions in to Utils That Use Models DS-416,DSL-416, DS-420,DS-206 & DSL-206 Switchgear in Class 1E Svc
Project stage: Meeting
ML20236A8491987-10-16016 October 1987
Forwards I.6177-5-1, Interim Rept on McGuire Reactor Trip Breaker 2B Failure Evaluation & Rcommended Corrective Actions from Westingtonhouse. Rept Explains Mechanical Binding Which Kept Breaker from Opening on 870702
Project stage: Other
ML20236A6141987-10-16016 October 1987
Advises That Util Insp of Reactor Trip Breakers Revealed Catawba Pole Shaft Which Had Welds W/Indications of Cracking.Forwards Informal Technical Communication from Franklin Research Ctr Re Initial Observation
Project stage: Other
ML20236D1051987-10-21021 October 1987
Provides Record of 871020 Telcon Between D Hood,D Sellers & V Hodge of NRC & J Mcvicker & Cowne of Bg&E Re Unit 1 480 Volt Circuit Breaker W/Broken Weldment Connecting Ctr Pole Lever to Pole Shaft.Util Exam Results in 860918 Memo
Project stage: Other
ML20236F5471987-10-23023 October 1987
Documents 871020 Telcon W/Util Re Unit 2 Circuit Breaker Pole Shaft Weld Failure
Project stage: Other
ML20236F9651987-10-27027 October 1987
Notification of 871103 Meeting W/Util & Westinghouse in Philadelphia,Pa to Discuss Results of Franklin Research Ctr Exam of Cracks in Pole Shaft Welds of Reactor Trip Breaker
Project stage: Meeting
ML20236S0181987-11-18018 November 1987
Summarizes 871020 Telcon Between NRC & Util Re Two Broken Fillet Welds on Pole Shaft Assembly of Circuit Breaker That Energizes Emergency Fire Protection Pumps for Facility. Photographs Attached to 870710 Memo to NRC Encl
Project stage: Other
ML20149M1981988-02-16016 February 1988
Advises That Since Util No Longer Operating Reactor Licensee Due to 870430 Shutdown & 870804 Amend,Modifying License DPR-45 to Possess But Not Operate Status,Generic Ltr 88-01 Determined Inapplicable to Facility
Project stage: Other
3F0288-18, Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Plant Does Not Use Westinghouse Circuit Breaker Models DS-206,DSL-206,DS-416,DSL-416 & DS-4201988-02-23023 February 1988
Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Plant Does Not Use Westinghouse Circuit Breaker Models DS-206,DSL-206,DS-416,DSL-416 & DS-420
Project stage: Other
ML20196H3531988-02-25025 February 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. No Westinghouse Ds Series Circuit Breakers Installed at Facility
Project stage: Other
ML20147G8541988-03-0101 March 1988
Responds to NRC Bulletin 88-001 Re Westinghouse Ds Series Circuit Breakers Used in safety-related Applications.Plant Does Not Have Any Westinghouse Ds Series Circuit Breakers
Project stage: Other
ML20147F9981988-03-0404 March 1988
Submits Response to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Author Does Not Utilize Any Westinghouse Circuit Breakers,As Identified in Subj Bulletin,In Class 1E Applications at Facility
Project stage: Other
ML20148A8901988-03-0707 March 1988
Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Unit 1 Has No Westinghouse Ds Circuit Breakers Used in Class 1E Application.Unit 2 Reactor Trip & Bypass Breakers Insp Initiated Per Info Notice 87-035
Project stage: Other
ML20150B1821988-03-0707 March 1988
Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Plant Does Not Use Westinghouse Circuit Breakers in Class 1E Applications So Bulletin 88-001 Does Not Apply to Plant
Project stage: Other
ML20150A8991988-03-0909 March 1988
Provides Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Util Determined That Westinghouse Series Ds Circuit Breakers Not Employed at Plant.Insp Required by Bulletin Not Applicable to Plant
Project stage: Other
ML20150C4071988-03-11011 March 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Util Determined That Westinghouse Type Ds Circuit Breakers Not Used at Plant
Project stage: Other
BECO-88-050, Notifies That Westinghouse Circuit Breakers Not in Use or Planned to Be Used in safety-related Applications at Util, in Response to NRC Bulletin 88-0011988-03-15015 March 1988
Notifies That Westinghouse Circuit Breakers Not in Use or Planned to Be Used in safety-related Applications at Util, in Response to NRC Bulletin 88-001
Project stage: Other
ML20148B6661988-03-16016 March 1988
Responds to 880205 NRC Compliance Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Westinghouse Ds Series Circuit Breakers Not Used in Class IE Svc at Plant
Project stage: Other
NRC-88-0072, Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Util Does Not Utilize Subj Circuit Breakers1988-03-24024 March 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Util Does Not Utilize Subj Circuit Breakers
Project stage: Other
ML20148K2251988-03-25025 March 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Two Reactor Trip Breakers & Two Reactor Trip Bypass Breakers Subj to Bulletin Used at Millstone Unit 3.Main Pole Shaft Weld Insps Completed by 880225
Project stage: Other
ML20151G7911988-03-28028 March 1988
Confirms That Westinghouse Ds Breakers Not Used at Facility, Per IE Bulletin 88-001, Defects in Westinghouse Circuit Breakers
Project stage: Other
W3P88-0051, Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Util Does Not Use Westinghouse Series Ds Circuit Breakers & Not Subj to Insps Requested in Bulletin1988-03-29029 March 1988
Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Util Does Not Use Westinghouse Series Ds Circuit Breakers & Not Subj to Insps Requested in Bulletin
Project stage: Other
ML20151A9451988-03-30030 March 1988
Responds to IE Bulletin 88-001 Re Westinghouse Ds/Dsl Circuit Breakers.Ref Components Not Utilized at Facility
Project stage: Other
0CAN048804, Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Informs That No Instances of Circuit Breakers Being Installed in safety-related Applications Identified at Plant1988-04-0101 April 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Informs That No Instances of Circuit Breakers Being Installed in safety-related Applications Identified at Plant
Project stage: Other
ML20151B2021988-04-0404 April 1988
Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers.Insp of All Westinghouse DS-415 Reactor Trip & Bypass Breakers Completed on 880308 & Results Encl
Project stage: Other
RBG-27645, Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Util Does Not Utilize Any Circuit Breakers Subj to Bulletin in Class 1E Svc at Plant1988-04-0404 April 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Util Does Not Utilize Any Circuit Breakers Subj to Bulletin in Class 1E Svc at Plant
Project stage: Other
ML18152A8181988-04-0505 April 1988
Responds to IE Bulletin 88-001, Defects in Westinghouse Circuit Breakers. No Westinghouse Type Ds Breakers Used at Plant
Project stage: Other
ML20148Q7241988-04-0707 April 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. No Westinghouse Models DS-206,DSL-206, DS-416,DSL-416 or DS-420 Breakers in Class 1E Circuits at Hatch
Project stage: Other
ML17251B0461988-04-0707 April 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Plant Does Not Have Westinghouse Circuit Breakers Subj to Bulletin
Project stage: Other
ML20151H7791988-04-0707 April 1988
Informs That Westinghouse Ds Circuit Breakers Not Utilized in Any 1E Application at Plant But Used in non-1E Applications & Will Be Included in Util Preventive Maint Program
Project stage: Other
ML20151E4191988-04-0808 April 1988
Responds to 880205 NRC Bulletin 88-01 Re Defects in Westinghouse Circuit Breakers for Facilities.Westinghouse Ds Series Circuit Breakers Not Used at Plants.Other Provisions of Bulletin Do Not Apply to Plants
Project stage: Other
GO2-88-084, Submits Info as Requested by NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers1988-04-11011 April 1988
Submits Info as Requested by NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers
Project stage: Other
ML20151E8681988-04-11011 April 1988
Forwards Response to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers in Class 1E Svc.All Required long-term & short-term Insps Completed
Project stage: Other
ML20151H9651988-04-13013 April 1988
Responds to NRC Bulletin 88-001, Deficiencies in Westinghouse Circuit Breakers. Bulletin Addresses Deficiencies Exclusive to Westinghouse Ds/Dsl Type Circuit Breakers & Outlines Specific Insps to Be Performed
Project stage: Other
ML20151G1151988-04-13013 April 1988
Ack Receipt of in Response to NRC Bulletin 88-001 Re Westinghouse Circuit Breakers.Plant Does Not Use or Plan Use of Circuit Breakers,Therefore Matter Closed
Project stage: Other
ML20205P6881988-04-20020 April 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. No Circuit Breakers Subj to Bulletin Installed in Plant
Project stage: Other
ML20155E3921988-06-0909 June 1988
Responds to NRC Bulletin 88-001 Re Defects in Westinghouse Circuit breakers.Sixty-six of sixty-seven Breakers Required New Pole Shafts Due to Failure of Welds to Meet Bulletin Requirements Resulting from Insp
Project stage: Other
ML20150C7431988-06-28028 June 1988
Forwards Arvin/Calspan Investigation of Trip Breaker Failure..., Explaining Mechanical Binding Which Caused Failure on 870702
Project stage: Other
ML20150B5261988-06-30030 June 1988
Informs That All Class 1E DS-416 Breakers Now in Use Comply W/Nrc Bulletin 88-001 Re Defects in Westinghouse Circuit Breakers
Project stage: Other
ML20150D3971988-07-0505 July 1988
Advises That Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers, Satisfactory
Project stage: Other
GO2-88-153, Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Results of Reinsp of Nine Breakers After Removal of Spring Provided1988-07-13013 July 1988
Responds to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Results of Reinsp of Nine Breakers After Removal of Spring Provided
Project stage: Other
ML20151E0181988-07-14014 July 1988
Advises That Util 880407 Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers, Satisfactory
Project stage: Other
ML20151Q9201988-08-0202 August 1988
Informs That Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers, Satisfactory
Project stage: Other
ML20154D2331988-09-0909 September 1988
Informs That Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers, Satisfactory & No Further Reply Necessary
Project stage: Other
ML20154E1541988-09-0909 September 1988
Advises That 880408 Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers, Satisfactory
Project stage: Other
ML20155A4561988-09-29029 September 1988
Requests Addl Info Re Util 880908 Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers. Response Requested within 70 Days of Ltr Date
Project stage: Other
ML17284A6111988-11-18018 November 1988
Advises That Util 880411 & 0713 Responses to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers Satisfactory
Project stage: Other
ML20235J1651989-02-17017 February 1989
Provides Final Response to NRC Bulletin 88-001, Defects in Westinhouse Circuit Breakers. Alignment Check Specified in 871201 Submittal Satisfactorily Performed During Installation of Replacement Pole Shaft in Breakers
Project stage: Other
ML20235J1681989-02-17017 February 1989
Advises That 880314 Response to NRC Bulletin 88-001, Defects in Westinghouse Circuit Breakers Satisfactory. Westinghouse Ds Series Circuit Breakers Not Used in safety-related Applications at Plant
Project stage: Other
ML20247C7191989-05-15015 May 1989
Forwards Supplemental Response to NRC Bulletin 88-001 Re Westinghouse Series Ds Circuit Breakers.Insp Info Corrected
Project stage: Supplement
1988-03-07
[Table View] |
Text
- _ - _ _ _ _. _ _
Lh L
j UNITED STATES
]f
?,
NUCLEAR REGULATORY COMMISSION
- 5 j
WASHINGTON, D. C. 20555 l
,6 OCT 211987 Docket Nos.:
50-317 and 50-318 i
i LICENSEE:
Baltimore Gas and Electric Company
' FACILITY:
Calvert Cliffs Nuclear Power Plant, Units 1 and 2
SUBJECT:
RECORD OF TELEPHONE DISCUSSION REGARDING CIRCUIT BREAKER FAILURE (TACS 65954/65955)
On October 20,'1987, members of the NRC-(D. Hood, D. Sellers and V. Hodge)-
called J. McVicker and S. Cowne of Baltimore Gas and Electric Company (BG&E) to discuss the Calvert. Cliffs Unit-1480 volt circuit breaker with a broken weldment connecting the' center pole lever to the pole shaft. Results of BG&E's examination are described in a September 18, 1986 memorandum (same as-i enclosure 2 of-0. Hood memorandum, " Notice of Meeting with Westinghouse Re-
'garding Class. IE Switchgear Models: DS-416, DSL-416, DS-420,.DS-206 and DSL 206," dated September 21, 1987, Docket Nos. 50-369 and 50-370).
BG&E responded to the following NRC questions:
Q.
When was the failure first discovered?
A.
September 2, 1986 Q.
Breaker type and service?
A.
Westinghouse Model DS-206 used in Class IE service for.the Unit 1 Control Room Habitability (Air Conditioning) System Q.
How detected?
A.
During routine maintenance Q.
How did breaker last perform?
A.
Broken weld did not affect breaker performance
.Q.
How many DS breakers are used at the facility?
A.
About 400 DS-206 breakers for both units.
Also use some 05-416 breakers.
Believe all of these to be Class IE.
Q. -Any other similar weld failures?
A.
None Q.
What is used for reactor trip breakers?
A.
GE AKs Q.
Why was a pole shaft removed from another breaker and sent along with the failed pole shaft to Materials Engineering and Analysis Unit for evaluation?
A.
It had bad appearing welds but was evaluated to be suitable for service.
8710200022 871021 POR ADOCK 05000317.
f P
PDR 1
-P-OCT 211987 Q.
Number of operating cycles at time of failure?
A.
Not known.
Breaker had operated for more than 2 years.
Failure probably happened in the first few cycles because it was an aged weld.
Fatigue was evidenced only in part of the weld associated with lack of fusion.
Q.
Any other reports on failed weld?
A.
Non conformance report 90386 and Maintenance Request 090286. Also Westinghouse reply by letter from E. Goslin and G. Steinel to J. McVicker dated November 17, 1986.
Will send copies (see enclosure).
\\b\\
Darl S. Hood, Project Manager Project Directorate II-3 Division of Reactor Projects, 1/II
Enclosure:
As stated cc:
J. McVicker, BG&E S. Cowne, BG&E J. Jelovich, W G. Steinel, C See next page
> 5 If 25li PD#11-3/DRP-I/II PD#11-3/DRP-I/II DHood/mac DHood, Acting PD 10/ u /87 10/
/87 71
ij c
MEETING
SUMMARY
DISTRIbUTION i.
OCT 211987
,M D6'ckEEFilii'?e, NRC Participants V*" N RCPDR "'""" 'O '
O. Hood e*
L PDR D. Sellers NSIC V. Hodge PRC System PD#I-1 Rdg f
S. McNeil-l A. Toalston l
T. Peebles, RII S., West K. Naidu J. Richardson Project Manager D. Hood M. Duncan B. Kolostyak W. Troskoski (MNBB 6113) 0GC-Bethesda ACRS (10) l G. Lainas OTHERS bec:
Licensee & Service List O
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