ML18150A138
| ML18150A138 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 11/16/1984 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| GL-83-28, NUDOCS 8412030449 | |
| Download: ML18150A138 (5) | |
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 Docket Nos. 50-280 and 50-281 Mr. W. L. Stewart November 16, 1984 Vice President - Nuclear Operations Virginia Electric and Power Company Post Office Box 26666 Richmond, Virginia 23261
Dear Mr. Stewart:
NOT[D NOV 2 6 \\984 o.JJortin By letter dated November 4, 1983, you submitted your response to Generic Letter 83-28 for Surry Power Station.
Your response included information on Items 4.2.1 and 4.2.2, Preventative Maintenance Program for Reactor Trip Breakers/Maintenance and Trending.
Based on our review of your submittal, we find that we need additional information to allow us to continue our review.
Please provide the information identified in the enclosure within 30 days or-provide us with your schedule for doing so.
This request for information was approved by the Office of Management and Budget under clearance number 3150-0011 which expires April 30, 1985.
Enclosure:
As stated cc w/enclosure:
See next page Sincerely,
~Steven A. Varga, Chief Operating Reactors Branch #1 Division of Licensing
e Mr. W. L. Stewart Virginia Electric and Power Company cc:
Mr. Michael W. Maupin Hunton and Williams Post Office Box 1535 Richmond, Virginia 23213 Mr. J. L. Wilson, Manager Post Office Box 315 Surry, Virginia 23883 Donald J. Burke, Resident Inspector Surry Power Station U.S. Nuclear Regulatory Commission Post Office Box 166, Route 1 Surry, Virginia 23883 Mr. Sherlock Holmes, Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683
. W. T. Lough Virginia Corporation Commission Division of Energy Regulation Post Office Box 1197 Richmond, Virginia 23209 Regional Radiation Representative EPA Region III Curtis Building - 6th Floor 6th and Walnut Streets Philadelphia, Pennsylvania 19106 Mr. J. H. Ferguson Executive Vice President - Power Virginia Electric and Power Company Post Office Box 26666 Richmond, Virginia 23261 James P. O'Reilly Regional Administrator - Region II U.S. Nuclear Regulatory Commission Suite 2900 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 James B. Kenley, M.D., Commissioner Department of Health 109 Governor Street Richmond, Virginia 23219 e
Surry Power Station Units 1 and 2 Attorney General 1101 East Broad Street Richmond, Virginia 05602
... ;/
SURRY UNITS. 1 AND 2 REQUEST FOR ADDITIONAL INFORMATION GL 83-28, ITEMS 4.2.1 AND 4.
2.2 INTRODUCTION
Virginia Electric and Power Company, the licensee for Surry Units 1 and 2, submitted their response to Generic Letter 83-28 on November 4, 1983.
That submittal has been reviewed with respect to Items 4.2.1 and 4.2.2 of the Generic Letter. The licensee'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.
- 1.
Item 4.2.1 - Periodic Maintenance Program for Reactor Trip Breakers.
1.1 Criteria for Evaluating Compliance with Item 4.2.1 The Surry Un its 1 and 2 Reactor Trip Systems ut 111 ze Westinghouse DB-SO circuit breakers.
The primary criteria for an acceptable maintenance program for this break.er are contained in Maintenance Program for DB-SO Reactor Trip Switchgear, Rev. 0, dated October 14, 1983, by Westinghouse.
The NRC Staff, Equipment Qualification Branch, has reviewed and endorsed the Westinghouse Maintenance Program for DB-SO Switchgear.
Specifically, the criteria used to evaluate compliance include those items in the Westinghouse program that relate to the safety function of the break.er, supplemented by those measures that must be taken to accumulate data for trending.
1.2 Issues Relating to Item 4.2.1 The licensee response states that preventive maintenance procedures for the breakers are in place and performed during each refueling outage.
Those procedures were not included in the submittal.
The response also states that the licensee expects to complete review and revision of the procedure by April, 1984.
Does the Surry Units 1 and 2 periodic maintenance program for the reactor tr1p breakers include, on a six month basis:
- 1.
Ver1f1cation of trip bar freedom;
- 2.
Verification of operating mechanism alignment and freedom, using the procedure identified in the Westinghouse program; 1
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- 3.
Retaining ring verification, 33 places;
- 4.
Verification of nut and bolt tightness;
- 5.
Verification of pole bases physical condition;
- 6.
Verification of arcing and main contacts physical condition, using the procedure identified in the Westinghouse program;
- 7.
Verification of insulating link's physical condition;
- 8.
Verification of wiring insulation and termination physical condition;
- 9.
Verification of arc chute physical condition; 10~
Verification of breaker cleanliness;
- 11. Undervoltage Trip Attachment (UVTA) dropout voltage test and lubrication, using the procedure identified in the Westinghouse program;
- 12.
Shunt Trip Attachment (STA) operation verification;
- 13.
Verification of operation of auxiliary switches;
- 14.
Inspection of positioning lever condition, using the procedure identified in Westinghouse program;
- 15.
Functional test of the breaker prior to returning it to service, using the procedure identified in the Westinghouse program.
Does the Surry Units 1 and 2 periodic maintenance program for the reactor trip.breakers include, on a refueling interval basis:
- 1.
Verification of cell interlock operation;
- 2.
Examination and cleaning of breaker enclosure;
- 3.. Measurement of trip force required, using the procedure identified in the Westinghouse program;
- 4.
Breaker response time for undervoltage trip;
-5.
Functional test of the breaker prior to returning it to service, using the procedure identified in the Westinghouse program.
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- I J
The licensee is to confirm that the periodic maintenance program includes these 20 items at the specified intervals or commit to their inclusion.
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- 2.
Item 4.2.2 - Trending of Reactor Trip Breaker Parameters to Forecast Degradation of Operability.
2.1 Criteria for Evaluating Compliance with Items 4.2.2 Four parameters have been identified as trendable and are included in the criteria for evaluation.
These are (1) undervoltage trip attachment dropout voltage,.(2) trip force, (3) breaker response time for undervoltag~ trip, and (4) breaker insulation resistance.
2.2 Issues Relating to Item 4.2.2 Th~ licensee submittal states that a "time response measuring device" for the reactor trip breaker will be evaluated in 1984, and, 1f acceptable, will be considered for incorporation into the maintenance program; the response, however, neither described the licensee's trending program nor identified those parameters which are being trended.
The licensee 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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