ML20128M304
| ML20128M304 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 07/01/1985 |
| From: | Adensam E Office of Nuclear Reactor Regulation |
| To: | Foster D GEORGIA POWER CO. |
| References | |
| GL-83-28, NUDOCS 8507110652 | |
| Download: ML20128M304 (6) | |
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UNITED STATES
-[f,.,'h NUCLEAR REGULATORY COMMISSION jj WASHINGTON. D. C. 20555 t-S July 1, 1935 Docket File
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NSIC Mr. Donald 0. Foster Vice President and Project General Manager Georgia Power Company Rt. 2, Box 299A Waynesboro, GA 30830
Dear Mr. Foster:
Subject:
Request for Additional Information on Vogtle Response to Generic Letter 83-28, Items 4.2.1 and 4.2.2 The staff has reviewed your response to Generic Letter 83-28, Items 4.2.1 and 4.2.2 dated November 8, 1983.
Based on this review, the staff has determined that additional information is needed before it can complete the review. The request for additional information is enclosed. We request prompt attention to this matter. Generic Letter 83-28 has been identified as an open item in the Vogtle Safety Evaluation Report.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P. L.96-511.
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Elinor G. Adensam, Chief v-Licensing Branch No. 4 Division of Licensing 4
Enclosure:
As stated DESIGN 7ED ORIGIIIAL cc: See next page
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8507110652 850701
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Mr. Donald Foster Vogtle Electric Generating Plant Georgia Power Company CC:
Mr. L. T. Gucwa Mr. William S. Sanders Chief. Nuclear Engineer Desident Inspector / Nuclear Regulatory Georgia Power Company Ccmmission P.O. Rox 4545 P.O. Box 572 Atlanta, Georgia 30302 Waynesboro, Georgia 30830 Mr. Ruble A. Thomas Depoish Kirkland, III, Counsel Vice President - Licensing Office of the Consumers' Utility Vogtle Project Council Georgia Power Company /
Suite 225 Southern Company Services, Inc.
32 Peachtree Street, N.W.
P.O. Box 2625 Atlanta, Georgia 30303 Birmingham, Alabama 35202 James E. Joiner Mr. R. E. Conway Troutman, Sanders, Lockerman, Senior Vice President - Nuclear
& Ashmore Power Candler Building Georgia Power Company 127 Peachtree Street, N.E.
P.O. Box 4545 Atlanta, Georgia 30303 Atlanta, Georgia 30302 Douglas C. Teper Mr. J. A. Bailey Georgians Against Nuclear Energy Project Licensing Manager 1253 Lenox Circle Southern Company Services, Inc.
Atlanta, Georgia 30306 P.O. Box 2625 Birmingham, Alabama 35202 Laurie Fowler Leoal Environmental Assistance Ernest L. Blake, Jr.
Foundation Bruce V. Churchill, Esq.
1102 Healy Building Shaw, Pittman, Potts and Trowbridge 57 Forsyth Street 1800 M Street, N.W.
Atlanta, Georgia 30303 Washington, D. C.
20036 Tim Johnson Mr. G. Bockhold, Jr.
Executive Director Vogtle Plant Manager Educational Campaign for Georgia Power Company a Prosperous Georgia Route 2, Box 299-A 175 Trinity Avenue, S.W.
Waynesboro, Georgia 30830 Atlanta, Georgia 30303 Regional Administrator Nuclear Regulatory Commission Region II 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 0
"CGTLE ELECTRIC GENERATING DLANT, UNITS 1 AND 2 REQUEST FOR ADDITIONAL INFORMATICN GL 83-28. ITEMS 4.1. 4.2.1 AND 4.2.2.
INTRODUCTION i
Georgia Power, the applicant for Vogtle Electric Generating Plant, Units 1 and 2, submitted their response to Generic Letter 83-28 on November 8, 1983.
The response has teen reviewed with respect to Items 4.1, 4.2.1 and 4.2.2 of the Generic Letter. The applicant's response was not sufficiently detailed to permit an evaluation of the adequacy of the periodic maintenance and trending programs for the breakers. The following additional information is required to evaluate compliance with Items 4.1, 4.2.1 and 4.2.2.
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Item 4.2.1 - Periodic Maintenance Program for Reactor Trip Breakers.
Criteria for Evaluating Cc cliance with Item 4.2.1
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The Vogtle Electric Generating Plant, Units 1 and 2 Reactor Trip Syttems utilize Westinghouse 05-416 circuit breakers.
The prim.ry criteria for an acceptable maintenance program for the 05-416 Reactor Trip Breaker (RTB) are contained in Westinghouse Maintenance Manual for the 05-416 Reactor Tri, Circuit Breaker, Revision 0, October 1984.
The NRC staff, i
Equipment Qualification Branch, has reviewed this document and endorsed the maintenance program described in it.
More specifically, the criteria used to evaluate compliance include those items in this document that relate to the safety function of the breaker, supplemented by those measures that must be taken to accumulate data for trending.
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Issuas Relating to Item 4.2.1 The applicant's response states that his maintenance and surveillance programs will be c mpleted by July 1936.
Tne aoplicant will address the requirements expressed in the z
Generic Letter in that program.
The Vogtle Electric Generating Plant, Units 1 and 2 periodic maintenance program for the reactor trip breakers, when completed, should include, on a six-month basis (or when 500 breaker operations have been counted, wnichever comes first):
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General inspection to include checking of breaker's cleanliness, all bolts and nuts, pole bases, arc chutes, insulating link, wiring and auxiliary switches; 2.
The retaining rings inspection, including those on the j
undervoltage trip attachment (UVTA) and shunt trip attachment (STA);
3.
Arcing and main contacts inspection as specified by the Westinghouse Maintenance Manual; 4.
UVTA check as specified by the Westinghouse Maintenance Manual, including replacement of UVTA if dropout voltage is greater than 60% or less than 30% of rated UVTA coil voltage; 5.
STA check as specified by the Westinghouse Maintenance Manual; 6.
Lubrication as specified by the Westinghouse Maintenance Manual; 7.
Functional check of the breaker's operation prior to returning it to service.
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r Tne Vogtle Elec ric Generating Plant, Units I anc 2 Periccic Maintenance Program for the r.eactor trip creakers snoulc include, on a refueling interval basis (c'r when 500 breaker ocerations nave ceen countec, wnicnever comes first):
1.
Pre-cleaning insulation resistance measurement and recording; 2.
RTB dusting and cleaning; 3.
Post-cleaning insulation resistance measurement and recording, as specified by the Westingnouse Maintenance Manual; 4
Inscection of main and secondary disconnecting contacts, bolt tigntness, secondary wiring, mechanical parts, cell switches, instruments, relays and other panel mounted cevices; 5.
UVTA trip force and breaker load check as specified by the Westinghouse Maintenance Manual; 6.
Measurement and recording RTB response time for the undervoltage trip; 7.
Functional test of the breaker prior to returning to service as specified by the Westinghouse Maintenance Manual.
The maintenance procedure should include a caution to the maintenance personnel against undocumented adjustments or modifications to RTBs.
The applicant is to confirm that the periodic maintenance program will include these fourteen items at the specified intervals or commit to their inclusion.
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Item 4.2.2 - Trending of Reactor Trip Breaker Parameters to Forecast Degradation of Operability.
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-- l-3.1 Criteria for Evaluatine Comoliance with Item t.2.2 t
Four parameters hav'e been identified as trendable anc are incluced in the criteria for evaluation. These are (a) uncervoltage trio attacnment cropout voltage, (b) trip force, (c) breaker response time for undervoltage trip, and (d) breaker insulation resistance.
3.2 Issues Relatino to Item 4.2.2 1
The applicant did not commit to trend the four parameters identified in the criteria for evaluating compliance with Items 4.2.2.
The NRC requires this trending data to forecast the reactor trip breakers degradation of operability. The applicant is to commit to inclusion of trip force, breaker response time and dropout voltage for undervoltage trip and breaker insulation resistance as trending parameters. The licensee should also identify the organization which will perform trend analysis, how often the analysis will be performed and how the information derived from the analysis will be used to affect periodic' maintenance.
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