ML20248E481

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Forwards Staff Position on Preoperational Testing of Upgraded Emergency Diesel Generators to Be Implemented During Refuel 7.Type Qualification Tests Not Required Provided Preoperational Test Program Successfully Completed
ML20248E481
Person / Time
Site: Crystal River Duke energy icon.png
Issue date: 09/25/1989
From: Silver H
Office of Nuclear Reactor Regulation
To: Wilgus W
FLORIDA POWER CORP.
References
TAC-67801, NUDOCS 8910050249
Download: ML20248E481 (6)


Text

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September 25, 1989 f

" Docket No. 50-302 DISTRIBUTION (DoctitFilet ACRS(10)

HRC & LPDRs SSaba 8/D/20 PD22 Rdg File MSinkuie RII Mr. W. S. Wilgus SVarga 14/E/4 Vic2 President, Nuclear Operations Glainas 14/H/3-Florida Power Corporation HSilver ATTH: Manager, Nuclear Operations GWunder Licensing HBerkow P. O. Box 219-NA-21 OGC Crystal River, Florida 32629 EJordan MNBB-3302 BGrimes 9/A/2

Dear Mr. W11gus:

SUBJECT:

CRYSTAL RIVER UNIT 3 - PRE-0PERATIONAL TESTING OF THE UPGRADED EMERGENCY DIESEL GENERATORS (EDG) (TAC NO. 67801)

In Florida Power Corporation (FPC) letters dated April 27, August 11, and August 14, 1989 and in the nceting of August 31, 1989, information was provided on the EDS upgrade program to be implemented during Refuel 7. At the August 31, meeting, we stated that because of the significant design changes to be made on the EDG, we considered the upgraded type EDG as not being previously qualified.

Therefore, qualification and pre-operational testing would be necessary as specified in Regulatory Cuide (RG) 1.0 Rev.2. However, in consideration of the tests and analyses performed by the EDG Manufacturer, the type qualification tests (300 tests with no more than 3 failures) would not be required, provided that a successful pre-operational test program is successfully completed. Ve agreed to provide the staff position on what would constitute an acceptable test program._ That position is enclosed.

Please confirm that the test outlined in the enclosure will be performed prior to declaring the EDGs operable. Any questions on this position should be discussed with the undersigned.

Sincerely, Original signed by Harley Silver, Project Manager Project Directorate 11-2 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

Enclosure:

As stated f

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/ I 2 kl DMil r HSilver:jd FRosafg/{'DHBerkow 09/ /89 09ggj89 09/n /89 09/gf/89 8910050249 890925 PDR ADOCK 05000302

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/orx .'e. 2 Mr. W. . S. -Wilgus ~ Crystal' River Unit No. 3 Nuclear g Florida Power Corporation. Generating' Plant cc: .

Mr.1X. H.'Stephens State Planning and Development

. General Counsel Clearinghouse

. . Florida Power Corporation. Office of Planning and Budget MAC'- ASD Executive Office of the Governor-P. O. Box 14042 .

The Capitol Building St. Petersburg, Florida 33733 Tallahassee, Florida 32301

~ Mr. - P. F. Mc' Ke'e, Director Chairman NuclearlPlant Operations - Board of County Commissioners Florida-Power Corporation Citrus County P. O. Box 219-NA-2C .

110 North Apopka Avenue w . Crystal River, Florida 32629 Inverness', Florida 32650 Mr._ Robert'B. Borsum Mr. Rolf C. Widell, Director i Babcock &.Wilcox ..

Nuclear Operations Site Support

. Nuclear Power Generation Division Florida Power Corporation

'1700 Rockville Pike, Suite 525 P.O. Box 219-NA-21 Rockville, Maryland 20852 Crystal River, Florida 32629 Senior. Resident. Inspector Mr. Gary L. Boldt

. Crystal River Unit: 3 Vice President, . Nuclear Production U.S. Nuclear Regulatory Commission Florida Power Corporation 15760 West Power'11ne Street' P. O. Box 219-SA-2C l , ' Crystal. River, Florida . 32629 Crystal River, Florida 32629

. Regional - Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street N.W., Suite 2900

~ Atlanta, Georgia 30323 Mr.. Jacob Daniel Nash Office' of Radiation Control Department of Health and Rehabilitative Services 1317 Winewood Blvd.

Tallahassee, Florida 32399-0700 Administrator Department of Environmental Regulation

' Power Plant Siting Section

. State of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Attorney General Department of Legal Affairs The Capitol Tallahassee, Florida 32304

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14  :. ENCLOSURE 9/11/89 5 STAFF POSITION ON PRE-OPERATIONAL TESTING l OF THE UPGRADED EMERGENCY DIESEL GENERATORS AT

. CRYSTAL RIVER 3 The two Emergency Diesel Generator (EDG) at Crystal River-3 (CR-3) will be modified according to an upgra5 program detailed in Florida Power Corporation

.(FPC) letters dated April 27, 1989, August 11, 1989, and August 14, 1989, and in the meeting of August 31, 1989. The FPC letter of August 11, 1989, states that the upgraded ratings have been confirmed by the diesel manufacturer based on testing performed at his plant on a 6-cylinder engine of similar basic design (the CR-3 diesels are 12-cylinder) and supporting analysis.

The old and the upgraded ratings of the EDG are:

Old Ratings Upgraded Ratings 0 - 2750kW Continuous 0 - 2850kW 2751 - 3000kW 2000 hours0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> 2851 - 3000kW


200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> 3001 - 3250kW 3001 - 3300kW- 30 minutes 3251 - 3500kW It was also stated in this FPC letter that after the upgrade modification, which will be implemented during Refuel 7- (Spring 1990), the automatically connected EDG accident load will be within the 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating, and that any subsequent manual loading that may be applied would not exceed the.200 hour0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> rating.

The staff considers the CR-3 upgraded EDGs as not having been previously qualified due to the significant design changes, and as such should meet the type qualification testing and site acceptance testing provisions respectively of Regulatory Guide (RG) 1.9 Rev. 2 and R.G.I.108.

With regard to type qualification, the staff concludes that this requirement has been met and no further " type qualification testing" is required provided the pre-operational (site acceptance) testing described below is successfully implemented.

This conclusion is based on consideration of the testing and analyses performed by the manufacturer cited above, and on the further confirmation of the capability

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2-f and reliability of the upgraded CR-3 EDGs which will be provided by successful

. completion of the following in-situ test program.

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. Pre-Operational Test Program:

, 4 The following tests should be conducted in-situ on each tipgraded EDG. These tests should be. performed after completion of the testing required by FPC for acceptance of the upgrade modification. . Credit may be taken for any FPC acceptance test that is essentially identical to a test in the pre-operational test program.

1.' Start and Load-Run Test:

a. Sta rt-Test: Demonstrate proper startup from ambient conditions and verify that the required design voltage and frequency is attained. For these tests, the diesel genera-tor can be slow started, be prelubricated, have prewarmed oil and water circulating, and should reach rated speed on a pre-specified schedule that is selected to minimize stress and wear.
b. Load-Run Test: Demonstrate full-plant emergency load carrying capability of not less than 2800kW until temperature equilibrium has been attained, but not less than I hour. This test could be accomplished by synchronizing the generator with offsite power.

The loading and unloading of a diesel generator during this test should be gradual and based on a prescribed schedule that is selected to minimize stress and wear on the diesel generator.

2. Fast-Start Test: Demonstrate tnat each diesel generator unit starts from ambient conditions and verify that the diesel generator reaches stable rated voltage and frequency within the limits and time, as de-fined in the plant technical specifications.
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3. Conbined Safety Injection Actuation Signal (SIAS) f and Loss of Offsite Power (LOOP) Test:

Demonstrate by simulating a LOOP in conjunction with SIAS that (1) the emergency buses are deenergized and loads are shed from the emergency buses and (2) the diesel generator starts on the auto-start '

signal from its standby conditions, attains the required voltage a.d frequency within the limits and time as per the plant technical  !

specifications, energizes auto-connected loads through the load sequencer, and operates while loaded with the auto-connected loads 4 for greater than or equal to 5 minutes.

4. Single-Load Rejection Test: Demonstrate the diesel generator's capability to reject a load equal to its largest single load (600kW) and verify that the voltage and frequency requirements are met.
5. Full-Load Rejection Test: Demonstrate the diesel generator's capability to reject a load equal to its expected maximum design .

load (approximately 3100kW), and verify that the voltage require-ments are met and that the unit will not trip on overspeed.

6. Endurance and Margin Test: Demonstrate full-load carrying capability for an interval of not less than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, of which 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> should be at a load of 3135kW and 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> at a load of 2800kW. Verify that voltage and frequency requirements are

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maintained.

7. Hot Restart Test: Demonstrate hot restart functional capability at full-load temperature conditions by verifying that the diesel generator starts on a manual or auto-start signal, attains the required voltage and frequency within the limits and time as per the plant technical specifications, and operates for longer than 5 minutes.

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8. ' Reliability Tests: Demonstrate through a mininum of 30 valid start '-

and-load; tests per item 1 above without failure on each diesel gen--

erator unit that an' acceptable level of reliability has been ' achieved

. to place the upgraded EDG into an operational category.

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