ML18019A599
| ML18019A599 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 02/21/1986 |
| From: | Buckley B Office of Nuclear Reactor Regulation |
| To: | Utley E CAROLINA POWER & LIGHT CO. |
| References | |
| GL-83-28, NUDOCS 8603030221 | |
| Download: ML18019A599 (8) | |
Text
0 February 21, 1986 Docket No. 50-400 Mr. E.
E. Utley, Senior Executive Vice President Power Supply and Engineering and Construction Carolina Power and Light Company Post Office Box 1551
- Raleigh, North Carolina 27602
Dear Mr. Utley:
DISTRIBUTION NRC PDR Local PDR PAD¹2 rdg T. Novak OELD E. Jordan B. Grimes J. Partlow B. Buckley I. Lee ACRS (10)
Tech Branch Gray File
Subject:
Request for Additional Information regarding Generic Letter 83-28 Items 4. 1, 4.2, and 4.2.2 - Preventive Maintenance Program for Reactor Trip Breakers/Maintenance and Trending We have reviewed your response dated November 7, 1983, to Generic Letter 83-28 and find that additional information, as delineated in the enclosure, is required in order to continue our review.
If you should have any questions regarding this request, please contact me at 301-492-9799.
Enclosure:
As stated cc:
See next page B.
C. Buckley, Project M
ager PWR Project Directorate ¹2 Division of PWR Licensing-A Office of Nuclear Reactor Regulation PM:PAD¹2 BBucg1 ey: hc 2/<V/86 LRuben tein 2/W/86 860303022f 86022k PDR ADQCK 05000400 A
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Mr. E. E. Utley Carolina Power 5 Light Company CC:
George F. Trowbridge, Esq.
Shaw, Pittman, Potts 5 Trowbridge 1800 M Street, NW Washington, DC 20036 Richard E. Jones, Esq.
Associate General Counsel Carolina Power 5 Light Company 411 Fayetteville Street Mall
- Raleigh, North Carolina 27602 Jo Anne Sanford, Esq.
Special Deputy Attorney General State of North Carolina Post Office Box 629
- Raleigh, North Carolina 27602 Thomas S. Erwin, Esq.
115 W. Morgan Street
- Raleigh, North Carolina 27602 Resident Inspector/Harris NPS c/o U.S. Nuclear Regulatory Commission Route I, Box 315B New Hill, North Carolina 27562 Charles D. Barham, Jr.,
Esq.
Vice President 8 Senior Counsel Carolina Power 5 Light Company Post Office Box 1551
- Raleigh, North Carolina 27602 Mr. John Runkle, Executive Coordinator Conservation Council of North Carolina 307 Granville Road Chapel Hill, North Carolina 27514 Mr. Wells Eddleman 806 Parker Street Durham, North Carolina 2770l Mr. George Jackson, Secretary Environmental Law Project School of Law, 064-A University of North Carolina Chapel Hill, North Carolina 27514 Shearon Harris Mr. Travis Payne, Esq.
723 W. Johnson Street Post Office Box 12643
- Raleigh, North Carolina 27605 Mr. Daniel F.
Read CHANGE Post Office Box 2151 Raleigh, North Carolina 27602 Bradley W. Jones, Esq.
U.S. Nuclear Regulatory Commission Region II 101 Marietta Street Atlanta, Georgia 30303 Richard D. Wilson, M.D.
725 Hunter Street Apex, North Carolina 27502 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street Suite 2900 Atlanta, Georgia 30303 Mr. Robert P. Gruber Executive Director Public Staff -
NCUC Post Office Box 991
- Raleigh, North Carolina 27602 Dr. Linda Little Governor's Waste Management Board 513 Albermarle Building 325 North Salisbury Street
- Raleigh, North Carolina 27611
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SHEARON HARRIS NUCLEAR POWER PLANT UNIT:
1 REQUEST FOR ADDITIONAL INFORMATION GL 83-28 ITEMS 4.1 4.2.1 AND 4.2.2'
'NTRODUCTION Carolina Power and Light Company, the applicant for Shearon Harris Nuclear Power Plant, Unit:
1 submitted their response to Generic Letter 83-28 on November 7, 1983.
The response has been 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 4.2.1 and 4.2.2.
I.
Item 4.2. 1 - Periodic Maintenance Program for Reactor Trip Breakers.
Criteria for Evaluatin Com liance with Item 4,2.1 The Shearon Harris Nuclear Plant, Unit 1 and 2 Reactor Trip Systems utilize Westinghouse DS-416 circuit breakers.
The primary criteria for an. acceptable maintenance program for the DS-416 Reactor Trip Breaker (RTB) are contained in Westin house Maintenance Manual for the DS-416 Reactor Tri Circuit Breaker, Revision 0, October 1984.
The NRC staff, 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.
Issues Re atin to Item 4.2.1 E
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The applicant response states that he will ieplement a
compr'ehenss.ve planned maintenance program covering the t
reactor trip breakers 'by'.december 1984.
This program will be based on the latest results of the life cycle testing program and the westinghouse recommendation(s).
As of April 1st, 1985.,
the NRC has not received any applicant's correspondence addressing this issue.
The Shearon Harris Nuclear Power Plant, Units 1 and 2 Periodic Maintenance Program for the reactor trip breakers should include, on a six-month basis (or when 500 breaker operations have been counted, whichever comes first):
1.
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 undervoltage trip attachment (UVTA) and shunt trip attachment (STA);
r 3.
Arcing and main contacts inspection. as specified by the Mestinghouse Maintenance Manual; 4.
UYTA check as specified by the Westinghouse Maintenance
- Manual, including replacement of UVTA if dropout voltage is greater than 60%%d or less than 30% of rated UYTA coil voltage; 5.
STA check as specified by the Westinghouse Maintenance Manual; r
6.
Lubrication as specified by the Westinghouse Maintenance Manual;
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7.
Functional check of the breaker's operation prior to returning it to service.
The Shearon Harris Nuclear Power Plant, Units 1 and 2
Periodic'aintenance Program for the reactor trip breakers should include, on a
refueling interval basis (or when 500 breaker operations hav'e been counted, whichever 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 Westinghouse Maintenance Manual; 4.
Inspection of main and secondary disconnecting
- contacts, bolt tightness, secondary wiring, mechanical parts, cell switches, instruments, relays and other panel mounted devices; 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;
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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.
II.
Item 4.2.2 - Trending of Reactor Trip Breaker Parameters Co Forecast Degradation of Operabi lity: -"
Criteria for Evaluatin Com liance with Item 4.2.2 Four parameters have been identified as trendable and are included in the criteria for evaluation.
These are (a) undervoltage trip attachment dropout voltage, (b) trip force, (c) breaker response time for undervoltage trip, and (d) breaker insulation resistance.
Issues Relatin to Item 4.2 '
The applicant states that he will incorporate a review of the parameters necessary to be trended with his planned maintenance program.
These parameters will then be included under the overall plant trending program, which will be in operation by December 1984.
As of April 1st, 1985, the NRC has not recieved any applicant's corespondence addressing this issue.
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 applicant should also identify the organization which will perform the 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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