ML20072J877

Rev 0 to Station Battery Capacity Tests,125-Volt Dc

ML20072J877
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	09/02/1976
From:	GOULD, INC.
To:
Shared Package
ML20072J835	List: ML20072J833 ML20072J850 ML20072J877 ML20072J888 ML20072J895 ML20072J903 ML20072J910 ML20072J916 ML20072J922
References
34.315.02, NUDOCS 8303300240
Download: ML20072J877 (17)

Text

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STATION BATIERY CAP!. CITY TESTS 125V DC 1.0 PURPOSE -

To provide instructions for testing the cepacity of the station 125V LC batteries and their ability to meet the demand require::ents of the system to .rhich they are connected satisfying the requirements of Reference 11.6.

2.0 RESPONSIBILITY The Maintenance Engineer shall be responsible for the proper

• implementation of this procedure.

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\~ 3.0 DISCUSSION l

Capacity tests performed on the 125V station ba :eries are divided into the following categories.

3.1 Acceptance Test - A capacity test perfor=ed on a battery upon initial installation to determine that it cee:s specifications or manufacturers ratings or both. This test consists of a constant current load equal to the manufacturers rating of the battery for a specific length of time.

3.2 Performance Discharge Test - A capacity test perforced during shutdown, within the first 2 years of service and a: 5 year intervals until the battery shows signs of degrada: ion. Annual performance tests should be given a battery that shows signs of degradation or has reached 85 percent of the service life expected for the application. Degradation is it.dicated whec the batte:y capacity drops more than 10 percent of rated capacity from its average on previous performance tests, or is below 90 percent of the manufacturers rating. This test is perforced on the battery, as found, after it has been in service to detect any change in capacity as determined by the acceptance test. Successful co:pletion of this test verifies the battery capacity to be at least 80 percent of the manufacturers rating. Test parameters (i.e. curre.nt load and test time) are the same as Acceptance Test para =eters for comparison purposes.

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i 3.3 Service Test - A special capacity test perforced during refueling operations or at so=e other outage, with intervals between tests not to exceed 18 months. These tests are perfor=ed to verify the capacity of the battery is adequate to caintain in o;erable status l all the actual emergency loads for a period of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

3.4 The following topics are contained in this procedure:

Page 8.1 Test Preparation 4 8.2 Acceptance & Performance Discharge Test 7 8.3 Service Test 7 8.4 Test Limits 8 8.5 Test Completion 8 Appendix 12.1 - Battery Capacity Correction Curve Appendix 12.2 - 125 Volt Battery capacity Test Data Sheet Appendix 12.3 - Individual Cell Voltage Data Sheet i Appendix 12.4 - 125 Volt Battery A - Load and Voltage Profile j

Appendix 12.5 - 125 Volt Battery B - Load and Voltage Profile Appendix 12.6 - 125 Volt Battery C - Load and Voltage Profile O

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SP34.315.02 Rev. D 9/2/76 Page 2

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'. 0 PRECAUTIONS 4.1 There shall be no scoking, sparks or open flames permitted in any of the battery rooms. Eydrogen released by the battery is er.tr e:ely flammable and may explode.

4.2 Ensure the battery area ventilation is operable. If ventila: ion system is inoperable, area shall be checked with a portab:e hydrogen analyzer.

concentration Nogreater entry should than 24*. be cade into a battery room with hydrogen 4.3 Use approprir.te electrical safety precautions while working on the battery.

4.4 If electrolyte comes in contact witn the skin or clothing it should be flushed i==ediately with water and then neutraliced with a solution of baking soda and water (1 lb./ gal.). If the eltetrolytc comes in contact with the eyes, wash or flush with large a=ounts of clean water. Secure medical treatcent immediately.

4.5 Use insulated or sparkproof tools whenever possible during battery maintenance.

4.6 The test leads shall be connected with sufficient length of cable to prevent accidental arcing in the vicinity of the battery.

k 4.7 All terminals and connections made up during this test shall be torqued to a value of 150 in. Ibs. + 6 in. Ibs.

4.8 Observe the bat:ery for intercell connector heating during the discharge test.

5.0 PREREQUISI~ES 5.1 Station Equipment Clearance Percits in accordance with Reference 11.4.

5.2 Ensure unobstructed egress from battery room.

5.3 Local eyevash and shower station operable.

l 5.4 Battery electrolyte at proper level.

5.5 l

Acceptance Test only - Equalizing Charge of station Batteries, 1

Reference 11.3, cust be performed 3 to 7 days prior to start of test.

'5.6 Prior to all capacity tests, Quarterly Station Battery Check -

Voltage & Density 125V DC, Reference 11.5, must be performed.

5.7 Insure load on battery is at cinimum by use of DC clamp on ammeter on battery output cables. The Maintenance Engineer's permission SP34.315.92 Rev. 9 9/2/76 Page 3

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shall be required for removal of battery leads with the battery carrying greater than a 10 amp load.

5.8 Visually check to insure all battery connections are clean, tight &

free of corrosion.

5.9 Test equipment required by this procedure shall be functional and shall not have exceeded the calibration due date.

5.10 The reactor shall be in CONDITION 3, 4 or 5 prior to the 125V battery being disconnected from its DC bus.

6.0 LIMITATIONS & ACTIONS i 6.1 During test as the battery voltage decreases the resistance of the load bank will have to be decreased periodically to naintain desired discharge current.

6.2 If any individual cell is approaching reversal of its polarity (plus 1 V or less) but the battery terminal voltage has not yet reached its lower test limits, the test should be continued with a jumper across the weak cell. Complete the jumper connection away from the cell to avoid arcing near the cell. The new minimum ter=inal voltage should be deterr.ined based on the recaining cells (1.75V x z no. of cells).

(s 1.0 MATERIALS OR TEST EQUIFMENT 7.1 Variable resistance bank 7.2 0-300 and 0-3 Volt DC voltmeter 7.3 0-1000 AMP /J: METER 7.4 0 to 300 AFJ DC CLAMP-ON A.M TER 7.5 0 to 300 IN. LB. TORQUE WRENCH '

8.0 PROCEDURE >

8.1 Test Freparation INITIAL 8.1.1 All applicable prerequisites completed, cla=p on ammeter reading

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SP34.315.92 Rev. 9 9/2/76 Page 4

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8.3.2 Isolate battery by removing the intercell bus connections tc which the output cable cor.nections are attached, lifting the six output cables as noted on the following sketch, and then replacing the intercell bus connections: -

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Figure 1: 125V Battery plan view

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-x 8.1.3 A cording to the following sketch connect test appara us to l the battery at terminals referred to in previous step, l (8.1.2). Test apparatus switch shall be left in the open position.

125 Volt Battery m

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Range 0-1000 A

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P Variable Resistr. ace Figure 2 125 Volt Battery - Capacity Test Apparatus Sketch SP34.315.02 Rev. D 9/2/76 Page 6

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8.1.4 Read and record temperature of battery electrolyte on every sixth cell.

cell no. temperature thermometer no.

8.2 Acceptance and Performance Discharge Test 8.2.1 Correct battery capacity for temperature according to capacity correction curve, Appendix 12.1 to correspond to a 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> discharge rate of 859 amps at 77'F (25'C).

Temperature corrected discharge rate amp.

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-] 8.2.2 Start the test by closing the test apparatus svitch, placing the load bank in the battery circuit, and caintain the constant current discharge rate calculated in step 8.2.1 for

{ the er. tire test period while performing and recording measurements designated on Appendices 12.2 612.3 at the following time intervals:

8.2.2.1 Appendix 12.2 - Reading at start of test and at ten minute intervals or whenever load resistance is changed.

l 8.2.2.2 Appendix 12.3 - Readings at start of test and at l

test times of 45, 90,105 and 120 cinutes.

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8.2.3 Proceed to step 8.4 for test limits.

8.3 Service Test 8.3.1 Start the test by closing the test apparctus switch, placing the load bank in the battery circuit, and caintain the constant current discharge rates and times specified in the applicable 125 Volt Battery Load & Voltage Profile (Appendices 12.4, 12.5 6 12.6) while performing and recording r.easurements designated on Appendices 12.2 & 12.3 j at the following time intervals:

i'~# 8.3.1.1 Appendix 12.2 Readings at start of test and every ten minutes or whenever the load resistance is

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8.3.1.2 Appendix 12.3 Readings at start of test and at test times of 45, 90,105 and 120 minutes.

8.4 Test. Limits 8.4.1 Maintain required discharge current until one of the following limits is reachtd:

S.4.1.1 Battery terminal voltage decreases to 105 volts (Icv average 1.75 volts).

8.4.1.2 Inability to naintain required current discharge rate.

8.4.1.3 Test time of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> elapsed (Service Test only).

8.5 Test coep*etion .

S.5.1 When one of the limits of paragraph 8.4 is reached record:

Test Duration Battery Voltaga Instr. No.

Ending Discharge Rate Instr. No.

, ,) 8.5.2 Open test circuit switch cnd disconnect test apparatus.

(. E.5.3 Set system voltage equal to battery voltage and reconnect battery ootput cables lifted in step S.1.2 Intercell.t.attery connections to which the battery output cables are attached should be lifted prior to and replaced follcuing output cable reconnections. Bolts shall be Torqued to the values in paragraph 4.7.

B.S.4 Watch Engineer notified that battery system is back to norcal that the charger and bus should be returned to service, and Reference 11.3 should be perforced.

8.5.5 Tor capa" an s; .ep ance or perfor:ance test determine the battery af the following equation: ,

A espacity @ 25*C = Ta x 100 2 hrs were the test discharge current is at rating and where Ta=

Actual terminalduration voltageof test to minimum specified

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) Calculated percent especity at 25'c v

8.5.6 (i If the battery does not deliver its expected capacity the test shall be repeated cnce after:

SP34.315.fI Rev. 9 9/2/76 Page 8

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Nf' 8.5.6.1 An equalir.ing charge has been perforced on the battery at least 3 to 7 days prior to the retest.

8.5.6.2 All connections have been checked to be clean, tight and free of corrosion.

9.0 ACCEPTASCE CRITERIA 9.1 Battery discharge tests shall be considered acceptable if the following criteria are met:

9.1.1 Acceptance Test: espacity 100% or greater 9.1.2 Performance Test: capacity 80% or greater 9.1.3 Service Test:

greater than 105two VD0hour test co=plete with battery voltage 9.2 Upon failure to meet the above Acceptance Criteria, the Watch Engineer shall be notified and a MWR shall be initiated in accordance with Reference 11.8 to find and correct the cause of the problem.

FINAL CONDITIONS

' )10.0 10.1 Battery reconnected to its respective bus and on float

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10.2 Procedure and data shects submitted for review, approval and retention in accordance with Reference 11.7.

11.0 REFEPENCES 1 11.1 Could Battery Tech. Manual File R42.lSD 11.2 IEEE Standard 450-1975, IEEE Recommended Practice for Maintenance, Testing and Replacenent of Large Lead Storage Eatteries for Generating Stations and Substations 1).3 SNPS SP23.315.02 Equalicing Charge of Station Eatteries 11.4 SNPS SP12.Oll.01 Station Equipment Clearance Permits 11.5 SNPS SP34.315.01 125 VDC Quarterly Station Battery Check - Voltage & Density 11.6 Technical Specifications, 5/19/76, Section 4.8.2.3.2.d and e 11.7 SP 12.916.91 Surveillance Program 11.8 SP 12.913.01 Maintenance Uork Requests

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SP34.315.02 Rev. 9 9/2/76 Page 9

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t 12.0 APPI?CICES l

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l 12.1 Capacity Corre-tion Curve for Temperatures at variances to star.dard i 77'T (25*F) at 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rate discharges, Specific Gravity - 1.215 '

12.2 125 volt Battery capa-ity Test Data Sheet 12.3 Individual Cell Voltage Data Sheet 12.4 125V Battery A Load and Voltage Profile 12.5 125V Eattery B Load and Voltage Profile 12.6 125V Eattery C Load and Voltage Profile T

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. - a r ---- i Cap city Corrsetica Curva for Te=paraturas

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', hour rate dircharges Specific Gravity - 1.215 I Y(~% -

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App ndix 12.2 O

I 125 Volt Battery Capacity Test System _ Data Sheet Volteeter No.__

A:seter No.

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Fr a dirg No . I 2 3 4 l 5 6 7 i l The .

Battery Voltue _

,Bettery Curren t

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iing N3. i 8 9 10 11 12 13

_ 14 17 e

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Battery Volter,e Battery Currect Reading No. 15 17 1_6 18 19 20 21 Time Battsry ,

Voltate Battery Current Conducted By: Date: '

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O Vslnt. Er.gr. Review: Date:

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SP 34.315.92 Rev. 6 9/2/76 .' Page 12 1

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APPEiDIX 12.3 INDIVIDL'AL CELL VOLTAGE DATA SHEET 125 VDC s'ts!EM VOLTETER NO.

,' Call Cell l No. ' Start 45 win 90 min .105 ein ,120 min No.

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Start 45 nin 90 min 105 ein 120 cir.

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Ccnducted By: Date:

Maint. Eng. Review: Date:

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. 1600 -

, NOTE: T!!.tE SCt,t.E IS EXPANDED i

1400 -

BEGINNit!G 1,t!O EtJO OF PERIOD 1200 - 111 5 cn1000 -

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w 800 -

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< 600 594 546

, 537 521 i 483 r---

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0 ' I I ' .1..-.J l 2 30 60 1;s 12o TIME (MINUTES) 120 -

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\l l G.67 g f il5.49 115 -

\l16.01 i 112.95 M \114.94 \

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105 I I I I 2 30 60 '

119 120 TIME (MINUTES) .

APPENDIX 12.4 s 125V BATTERY A f.

- LOAD AND VOLTAGE PROFILE

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l600 -

/q 1584 NOTE: TIME SCALE IS EXPANDED I400 -

BEGINNING A.N3 Et.D OF PERIOD 1200 -

m 1000 -

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CC W 800 -

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k 600 - 585 400 -

345 33s

, 282 20 i

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. I 2 30 60 11 9 120 TIME (MINUTES) - -

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11 6.7 o .16.85 en ,

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I 2 30 60 11 9 120 TIME (MINUTES)

.4 APPENDIX 12.5 125V D C BATTERY S

(. LOAD AND VOLTAGE PROFILE o

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O 1600 -

1 V 1456 NOTE: TIME SCI,LE IS EXPANOED l 1400 -

BEGINNI.'JG AND END OF PERio3 1200 -

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en 1000 -

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482 502 400 -

200 -

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1 2 30 60 11 9 120 TIME (MINUTES)

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APPENDIX 12.6 125 V BATTERY C b LOAD AND VOLTAGE PRO."ILE

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DOTES FOR APPENDICES 12.4, 12.5 & 12.6

1. Voltage profiles are based on the design minimum temperature of 77'F.

- 2. Voltage profiles are based on end-of-life capacity of the batteries (80 percent of rated capacity).

3. Voltage profiles are based on assumed loss of current supplied by the battery charges fer the entire 2 hr. period.

4. The load profiles are based on the limiting DBA with respect to battery capacity, which is the LOCA.

5. Load profiles are based en canual/ remote stopping from the main control roem of certain non-safety related loads after they are no lor.ger required. These' loads are oil ptaps for reactor recirculation pump M.G. set - turned of f after 60 min.

Main turbine bearing oil pu=p - turned off after 60 min.

.v Design minicum charge state is 105 V.

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