ML20134L201

Forwards Request for Addl Info Re Preventive Maint Program for Reactor Trip Breaker/Maint & Trending,Per Generic Ltr 83-28.Info Required to Evaluate Compliance W/Items 4.2.1 & 4.2.2 Required within 30 Days of Ltr Receipt

ML20134L201
Person / Time
Site:	Crystal River
Issue date:	08/26/1985
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Wilgus W FLORIDA POWER CORP.
References
GL-83-28, NUDOCS 8509030124
Download: ML20134L201 (5)

Text

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, , August 26, 1985 Docket No. 50-302 DISTRIBUTION tDocketFQega RIngram NRC~PDR HSilver L PDR BMozafari Mr. Walter S. Wilgus ORB #4 Rdg Gray File Vice President, Nuclear Operations HThompson EBrach Florida Power Corporation OELD N0rnstein ATTN: Manager, Nuclear Licensing EJordan WPaulson

& Fuel Management JPartlow GEdison P. O. Box 14042; M.A.C. H-3 ACRS-10 St. Petersburg, Florida 33733

Dear Mr. Wilgus:

We have reviewed ye"r response of November 4,1983 to Generic Letter 83-28 with respect to the preventive maintenance program for reactor trip breaker / maintenance and trending for Crystal River Unit 3. In order to complete our review, the additional information identified in the enclosure is required.

Please provide your responses to the enclosed request for additional information within 30 days of receipt of this letter.

Sincerely, acm ou.w ;#.u ef Jwu J. s1%4' John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing

Enclosure:

Request for Additional Information cc w/ enclosure:

See next page Tc7 0 BJ4:0L ORB #4:DL HSilver;cr JStolz 8/g85 8h>/85 8509030124 850826 PDR ADOCK 05000302 P pg

CRYSTAL RIVER UNIT 3 i REQUEST FOR ADDITIONAL INFORMATION GL 83-28, ITEMS 4.2.1 AND 4.2.2, TASK A6814 INTRODUCTION Florida Power Corporation, the licensee for Crystal River Unit 3, sucmitted their response to Generic Letter 83-28 on November 4, 1983.. That re:ponse has been' reviewed with respect to Items 4.2.1 and 4.2.2 of the Generic Letter. The licensee submitted tneir preventative maintenance procedure PM-118. The purpose of this procedure is stated "to provide

. instructions for inspecting, cleaning, and cesting of control rod crive (CRD) system AC and DC breakers on a six month basis." The following acditional 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 Trio Breakers.

1.1 Criteria for Evaluating Comoliance with Item 4.2.1 Crystal River Unit 3 Reactor Trip Systems utilize General Electric AK-2A circuit breakers. The primary criteria for j an acceptable maintenance program for this breaker are contained in Maintenance Instruction GEI-50299EI*, " Power Circuit Breakers, Types AK-2/2A-15, AK-2/3/2A/3A-25, ARU-2/3/2A/3A-25," and Service Advice 9.35 and 9.20, by

General Electric. The NRC Staff, Ecuipment Qualification

. Branch, has reviewed these items and encorsed the maintenance program they describe. .More specifically, the criteria used to evaluate compliance include those items in the General Electric instructions and acvisories that relate 4

to the safety function of the breaker, supplemented by tnose .

measures that must be taken to accumulate data for-trending. The acceptable maintenance ac-ivity interval is six months.

1.2 Issues Relating to Item 4.2.1-The licensee response states that. preventative maintenance on the Reactor Trip Breakers will be identified to achieve reliable breaker operability without unnecessary maintenance efforts. Data from all AC and DC Reactor Trip Breakers .

(RTSs) will be collected to include breaker response times, as-found and as-left trip bar torque values, and as-found.

and as-left undervoltage pickup voltage setpoints.

The Crystal River Unit 3 periodic maintenance program for i

the reactor trip breakers should include, on a six month I basis:

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1. Verification of breaker physical condition, including wiring insulation and termination, all retaining rings, pole bases, are quencher, stationary and movable contacts, anc tightness of nuts and bolts;

2. Verification of the optimum freedom of the armature as specified in General Electric Service Advice 175-9.35, item #51;

3. Verification of proper trip response time as specified in Service Advice 175-9.3S, item #56; 4 Lubrication of trip shaft and latch roller bearings with Mobil 25 lubricant;

5. Examination and cleaning of breaker enclosure;

6. Functional test of the breaker crior to returning it to service.

Tneikcenseeistoconfirmtnattheperiodicmaintenanceprogram includes tnese six items at tne specified interval or commit to their inclusion and e-ovide a date oy wnich tney will be included.

2. Item 4.2.2 - Trending of Reac+.or 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 torque, (3) breaker response time for undervoltage trip, and (4) breaker insulation resistance.

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2.2 Issues Relatino to Item 4.2.2 ine licensee suomittal states that tne licensee "is carticipating in the B&W Owners Grouc Reactor Trip Breaker  !

(RTB) Reliability Program. The RTB Reliability Program will l compile and analyze maintenance and surveillance data for  !

the General Electric AK-2 RTBs." The licensee stated also that they will collect data that includes breaker response time, trip bar torques values and undervoltage pickup voltage set points. The licensee and other utility members of B&W Owners Group will send the data to B&W which will compile the data and issue periodic reports to each of these utilities to compare its breaker performance with "the norm defined by the data base."

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. i The licensee is to commit to inclusion of trip torque, breaker response time and dropout voltage for undervoltage trip and breaker insulation resistance as trending parameters. The licensee should also identify the internal organization which will perform trend analysis, how often i the analysis will be performed and how the information derived from the analysis will be used to affect periodic maintenance.

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Mr. W. S. Wilgus Crystal River Unit No. 3 Nuclear ,

Florida Power Corporation Generating Plant '

cc:

Mr. R. W. Neiser Bureau of Intergovernmental Relations Senior Vice President 660 Apalachee Parkway i and General Counsel Tallahassee, Florida 32304 l Florida Power Corporation P. O. Box 14042 Mr. Wilbur Langely, Chairman St Petersburg, Florida 33733 Board of County Commissioners Citrus County Nuclear Plant Manager Inverness, Florida 36250 Florida Power Corporation P. O. Box 219

• Crystal River, Florida 32629 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Resident Inspector U.S. Nuclear Regulatory Commission Route #3, Box 717 Crystal River, Florida 32629 Regional Administrator, Revion II U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Mr. Ulray Clark, Administrator Radiological Health Services Department of Health and Rehabilitative Services 1323 Winewood Blvd.

Tallahassee, Florida 32301 Administrator Department of Environmental Regulation Power Plant Siting Section l State of Florida '

2600 Blair Stone Road Tallahassee, Florida 32301 Attorney General Department of Legal Affairs ,

The Capitol Tallahassee, Florida 32304 l