ML20128K494
| ML20128K494 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 06/18/1985 |
| From: | Knighton G Office of Nuclear Reactor Regulation |
| To: | Carey J DUQUESNE LIGHT CO. |
| References | |
| TAC-62874, NUDOCS 8507100600 | |
| Download: ML20128K494 (7) | |
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Docket No.:
50-412 f!r. John J. Carey Vice President, Nuclear Duquesne Light Company Robinson Plaza Building, No. 2, Suite 10 PA Route 60 Pittsburch, Pennsylvania 15205
Dear Mr. Carey:
SUBJECT:
REQUEST FOR ADDITI0f'AL INFORMATION (PAI) REGARDING POST-FIRE SAFE SHUTDOWN CAPARILITY - BEAVER VALLEY POWER STATION, UNIT 2 Enclosed please find the RAI relatino to post-fire safe shutdown capability for review of SRP Section 9.5.1 (Appendix P). He understand that DLC has to provide supplemental information concerning safe shutdown and alternate shutdown by the end of June, 1985. Your pronot response to these requests along with the supplerrental information will expedite the resolution of this issue in the SER.
Should you have any questions concerning the enclosed requests please contact the Project Manager, B. K. Singh at (30I) 492-8423.
Sincerely, l5 Georae W. Knighton, Chief Licensing Branch No. 3 Division of Licensing
Enclosure:
As stated cc: See next page DISTRIBUTION
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l Beaver Valley Mr. John J. Carey Vice President, Nuclear Duquesne Light Company Robinson Plaza Building, No. 2, Suite 110 PA Route 60 Pittsburgh, Pennsylvania 15205 Gerald Charnoff, Esq.
Mr. R. E. Martin, Manager Engineering Jay E. Silberg, Esq.
Beaver Valley Two Proiect Shaw, Pittman, Potts & Trowbridge Duquesne Light Company 1800 M Street, N.W.
Robinson Plaza Building No. 2, Suite 110 Washington, DC 20036 PA Route 60 Pittsburgh, Pennsylvania 15205 Mr. C. W. Ewing, Quality Assurance Zori Ferkin Manager Assistant Counsel Quality Assurance Department Governor Energy Council Duquense Light Company 1625 N. Front Street P. O. Box 186 Shippingport, Pennsylvania 15077.
Harrisburg, PA 15105 Mr. John J. Carey Vice President, Nuclear Duquense Light Company Director, Pennsylvania Emergency P. O. Box 4 Management Agency Pittsburgh, Pennsylvania 15205 Room B-151 Transportation & Safety Building Harrisburg, Pennsylvania 17120 Mr. T. J. Lex Mr. Thomas Gerusky Westinghouse Electric Corporation Bureau of Radiation Protection Power Systems PA Department of Environmental P. O. Box 355 Resources Pittsburgh, Pennsylvania 15230 P. O. Box 2063 Harrisburg, Pennsylvania 17120 Mr. P. RaySircar Stone & Webster Engineering Corporation BVPS-2 Records Management Supervisor P. O. Box 2325 Duquesne Light Company Boston, Massachusetts 02107 Post Office Box 4 Shippingpart, Pennsylvania 15077 Mr. Glenn Walton U. S. NRC John A. Lee, Esq.
P. O. 181 Duquesne Light Company Shippingport, Pennsylvania 15077 1 0xford Centre 301 Grant Street Mr. Thomas E. Murley, Regional Admin.
Pittsburgh, Pennsylvania 15279 U. S. NRC, Region I 631 Park Avenue King of Prussia, Pennsylvania 15229
l-o 2-Mr. E. F. Kurtz, Jr., Manager Regulatory Affairs Beaver Valley Two Project Duquense Light Company Robinson Plaza Buidling No. 2 Suite #210 PA Route 60 Pittsburgh, Pennsylvania 15205 d'
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Enclosure BEAVER VALLEY POWER STATION, UNIT 2 REQUEST FOR ADDITIONAL INFORMATION GL 83-28, ITEMS 4.1, 4.2.1 AND 4.2.2.
INTRODUCTION Duquesne Light, the applicant for Beaver Valley Power Station, Unit 2, submitted their response to Generic Letter 83-28 on March 30, 1984. The response has been rc/lewed 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 ta 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 Evaluating Comoliance with Item 4.2.1 The Beaver Valley Unit 2 Reactor Trip System utilizes Westinghouse 05-416 circuit breakers. The primary 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 Trio Circuit Breaker, Revision 0, October 1984 The NRC staff, Equipment Qualification Branch, has reviewec this document and endorsed the maintenance program cescribec 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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Issues Relating to Item 4.2.1 The applicant's response states that he will review the Westinghouse program and adopt the preventive maintenance recommendations determined necessary to maintain the reactor trip breakers.
The Beaver Valley Unit 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.
The retaining rings inspection, including those on the under-voltage trip attachment (UVTA) and shunt trip attachment (STA);
2.
Arcing and main contacts inspection as specified by the Westinghouse Maintenance Manual; 3.
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; 4.
STA check as specified by the Westinghouse Maintenance Manual; 5.
Lubrication as specified by the Westinghouse Maintenance Manual; The applicant should confirm that his Periodic Maintenance Program for the reactor trip breakers includes, on a refueling interval basis (or when l
500 breaker operations have been counted, whichever comes first):
1.
Pre-cleaning insulation resistance measurement and recording; i
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Post-cleaning insulation resistance measurement and recording, as specified by the Westinghouse Maintenance Manual; i
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Inspection of main and secondary disconnecting contacts, bolt tightness, secondary wiring, mechanical parts, cell switches, instruments, relays and other panel mounted devices; 4.
UVTA trip force and breaker load check as specified by the Westinghouse Maintenance Manual; 5.
Functional test of the breaker prior to returning to service as speciffe'd 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 includes these ten items at the specified intervals or commit to their inclusion.
II.
Item 4.2.2 - Trending of Reactor Trip Breaker Parameters to Forecast Degradation of Operability.
1 Criteria for Evaluating Compliance 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 Relating to Item 4.2.2 The applicant states that he will trend the " breakers operational response time." Any significant degradations found will be identified to Operations, Maintenance, and Upper Management for corrective action.
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It is not clear what the applicant means by " breakers operational response time".
The applicant is to commit to inclusion of. trip force, breaker response time for undervoltage trip, dropout voltage for undervoltage trip and
. breaker insulation resistance as trending parameters.
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