ML20073S032

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Proposed Tech Specs 4.8.2.1.2.e & 4.8.2.1.2.f Re Dc Sources
ML20073S032
Person / Time
Site: Byron, Braidwood  Constellation icon.png
Issue date: 02/10/1994
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20073S030 List:
References
NUDOCS 9402160319
Download: ML20073S032 (6)
v • d • e


Text

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ATTACHMENT B l

. l SUPPLEMENT TO MARKED UP PAGES FOR I PROPOSED CHANGES TO APPENDIX A TECHNICAL SPECIFICATIONS OF FACILITY OPERATING LICENSES l l NPF-37, NPF-66, NPF-72, AND NPF-77 l l

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BYRON STATION UNITS 1 & 2 BRAIDWOOD STATION UNITS 1 & 2 l REVISED PAGES: REVISED PAGES:  !

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l 3/4 8-11a 3/4 8-11 l l B 3/4 8-2 B 3/4 8-2 I l

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kinla/brwd:batrespl:6 9402160319 940210 PDR ADOCK 05000454 .

P PDR .!

. ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued)

b. At least once per 92 days and within 7 days after a battery discharge with battery terminal voltage below 110 volts, or battery overcharge with battery terminal voltage above 145-volts, by verifying tnat:
1) The parameters in Table 1.8-2 meet the Category B limits,
2) There is no visible corrosion at either terminals or correctors, or the connection resistance of these items is less than 150 x 10 s ohm *, and
3) The average electrolyte temperature of all connected cells is above 60 F.
c. At least once per 18 months by verifying that:
1) The cells, cell plates, and battery racks show no visual' indication of physical damage or abnormal deterioration,
2) The cell-to-cell and terminal connections are clean, tight, and coated with anticorrosion material,
3) The resistance of each cell-to-cell and terminal connection is less than or equal to 150 x 10 6 ohm *, and
4) The battery charger will supply a load equal to the manufacturer's rating for at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. l
d. At least once per 18 months, during shutdown, by verifying that the )

battery capacity is adequate to supply and maintain in OPERABLE l status all of the actual or simulated emergency loads _for 240 minutes l' when the battery subject to a batf,gcy_ service test; 6t hv M, O @T+T) 60% ba ,- Cb mcJhd ,4

e. __ , during shutdown, oy 7erifying-that-t At least battery onceisper capacity 60 months]t,$6% ofur_er's at leas the maJnufa rating whe subjected to a performance, discharge testF Th49erforma l tes9may be performed in lieu of the battery service test requireP b

M-T) b fmt 3'yleast Specification 4.8.2.1.Lddft'Aa-[C' once per 18~montns during s utdown,~by w tb5d'5*

~eddad giving performance M @;"dd 6*Y~' 0*h ,Q ischarge tests of battery capacity to any battery that_shows signs NO pig )\ pgg of degradation or has reached 85% of the service life expected for y the t aDolication. Degradation is indicated when the battery capacity ,g drops more thanM of rated capacity from its' n q% previous M perf ance tes or is below@ of the manufacturer's rating.

oc.ru) M lcd, w ee ks Qoo% ((1T+T) to% SAJ4 T B.2.1.3 At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, when in specification .$.8.2.1.c. (2),

verify the total crosstie loading will not exceed 63 amps.

  • 0btainec by subtracting the normal resistance of: 1) the cross room rack connector (400 x 10 6 ohm, typical) and 2) the bi-level rack connector (50 x 10 6 ohm, typical); from the measured cell-to-cell connection resistance.

BRAIDWOOD - UNITS 1 & 2 3/4 8-11 AMENDMENT NO. 5

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, ' ELECTRIC POWER SYSTEMS l BASES i

A.C. SOURCES, D.C. SOURCES, AND ONSITE POWER DISTRIBUTION (Continued)

The Surveillance Requirement for demonstrating the OPERABILITY of the /)pl)

! station batteries is based on the recommendations of Regulatory Guide 1.129, scer

! " Maintenance Testing and Replacement of Large Lead Storage Batteries for - o ba j Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommende ,

Practice for Maintenance, Testing, and Replacement of Large Lead Storage -

j Batteries for Generating Stations and Substations." f i Verifying average electrolyte temperature above the minimum for which the  ;

j battery was sized, total battery terminal voltage on float charge, and the  ;

j performance of battery service and discharge tests ensures the effectiveness

of the charging system, the ability to handle high discharge rates and compares i the battery capacity at that time with the rated capacity.
  • I Table 4.8-2 specifies the. normal limits for each designated pilot cell  ;

and each connected cell for electrolyte level, float voltage and specific i j gravity. The limits for the designated pilot cells float voltage and specific i

gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charge-

, specific gravity or a battery charger current that had stabilized at a low i value, is characteristic of a charged cell with adequate capacity. The normal -

i limits for each connected cell for float voltage and. specific gravity, greater  ;

l than 2.13 volts and not more than 0.020 below the manufacturer's full charge  :

j specific gravity with an average specific gravity of all the connected cells i

not more than 0.010 below the manufacturer's full charge specific gravity,
ensures the OPERABILITY and capability of the battery.

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8-2 is permitted for up to '

l 7 days. During this 7-day period: (1) the allowable values for electrolyte

. level ensures no physical damage to the plates with an adequate electron ,

transfer capability; (2) the allowable value for the average specific gravity  !
of all the cells, not more than 0.020 below the manufacturer's _ recommended full 1 i charge specific gravity, ensures that the decrease in rating will be less than j the safety margin provided in sizing; (3) the allowable value for an individual cell's specific gravity, ensures that an individual cell's specific gravity l will not be more than 0.040 below the manufacturer's full charge specific 4

gravity and that the overall capability of the battery will be maintained

, within an acceptable limit; and (4) the allowable value for an individual i cell's float voltage, greater than 2.05 volts, ensures the battery's capability j to perform its design function.

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4 BRAIDWOOD - UNITS 1 & 2 B 3/4 8-2 l

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ELECTRICAL POSER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 1hTQ~ %C#4' CMd))t CO' #' na tw-u doond M9

. easonce per 60 months ]during shit 00Wn, by verifyihTthat the ~f battery capacity is at leastW of the manufacturer's ratino when /

subjected to a performance discharge testfr Thgrperfomance discharge j* -

testmay be performed in lieu of the battery service test required Md p TeT) ad Akt At t.

LdM~ecif4catinn least once per 18 mofiths4.B.2.1.2d

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6 by_giving

~hdAts' during shutdown,-ad*

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twE-*bh dee-o performance ush discharge testdof battery capacity to any tiattery that shows signs ~%

, N of deoradation or has reached 85% of the service life expected for 5% ATJT lodMI)) the application.), Degradation is indicated when the battery capacit drops more than ME of rated capacity from its ave 2;;Pon(previous .L

~. nerformance test 4, or is below-90% of the manufacturer's rating hLnW4.8.2.1.3 kh*kts / WT4TxT1 90% (ww.

At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, when in specifi' cation 3.8.2.1.c. u),

verify the total crosstie loading will not exceed 63 amps.

BYRON - UNITS 1 & 2 3/4 8-11a Amendment No.5

i ELECTRIC POWER SYSTEMS BASES A.C. SOURCES, D.C. SOURCES, AND ONSITE POWER DISTRIBUTION (Continued) _

The Surveillance Requirement for demonstrating the OPERABILITY of the PDD pyycr station batteries is based on the recommendations of Regulatory Guide 1.129, ea"

, " Maintenance Testing and Replacement of Large Lead Storage Batteries for i Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended

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Practice for Maintenance, Testing, and Replacement of Large Lead Storage >

Batteries for Generating Stations and Substations." p_ _

verifying average electrolyte temperature above the minimum for wh hh the battery was sized, total battery terminal voltage on float charge, and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability to handle high discharge rates and compares the battery capacity at that time with the rated capacity.

) Table 4.8-2 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage and specific l gravity. The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charge specific gravity or a battery charger current that had stabilized at a low a

value, is characteristic of a charged cell with adequate capacity. The normal limits for each connected cell for float voltage and specific gravity, greater i

. than 2.13 volts and not more than 0.020 below the manufacturer's full charge  !

{ specific gravity with an average specific gravity of all the connected cells not more than 0.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8-2 is permitted for up to 7 days. During this 7-day period: (1) the allowable values for electrolyte 4 level ensures no physical damage to the plates with an adequate electron I transfer capability; (2) the allowable value for the average specific gravity

of all the cells, not more than 0.020 below the manufacturer's recommended full

. charge specific gravity, ensures that the decrease in rating will be less than  !

the safety margin provided in sizing; (3) the allowable value for an individual

. cell's specific gravity, ensures that an individual cell's specific gravity will not be more than 0.040 below the manufacturer's full charge specific gravity and that the overall capability of the battery will be maintained within an acceptable limit; and (4) the allowable value for an individual

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cell's float voltage, greater than 2.05 volts, ensures the battery's capability

, to perform its design function.

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BYRON - UNITS 1 & 2 B 3/4 8-2

ATTACHMENT B (Continued)

INSERT "D" for page B 3/4 8-2:

'idThb modified performance . . .

discharge test is describedfin ~the April 24fl992 Draft?avisionito'IEEE.Std1450, t'IEEE. Recommended Practice;for., Maintenance, Testip . ,( and Replacement 6f

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Vented. Lead-Acid Batteries for Stritio~ nary; Appl _icationi"ilt is permissible to.

perform aimodified performance,dischargeLtest on thWAT&Ttbattery in lieu 6f,ii service test andPosition L129,'. Regulatory a performance C.1, because discharge; test as ie' the test _ discharge quired;by,Regulatsry;Giiide rate envelo' pes,.the"lo hd cycle of the service.testj Verification of the crosstie loading limits in Specifications 3.8.2.1 and 3.8.2.2 ensures that the OPERABLE battery will have sufficient capacity to energize the design basis loads ofits DC bus while maintaining the limited DC loads of the inoperable DC bus on a shutdown unit.

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  • NOTE: Highlighted change indicates supplement l

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