ML20212J954

Proposed Tech Spec Pages 3/4 8-8 & 3/4 8-9 & Table 4.8-1, Revising Battery Operability Requirements

ML20212J954
Person / Time
Site:	Davis Besse
Issue date:	01/21/1987
From:	TOLEDO EDISON CO.
To:
Shared Package
ML20212J918	List: ML20212J915 ML20212J948 ML20212J954
References
TAC-64465, NUDOCS 8701280380
Download: ML20212J954 (7)

Text

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ELECTRICAL POWER SYSTEMS I 0.C. DISTRIBUTION - OPERATING i

LIMITING CONDITION FOR OPERATION l l

3.8.2.3 The following D.C. bus trains shall be energized and OPERABLE with 44c breaker - between bu: trains open: l disconnect swHches TRAIN "A" consisting of 250/125-volt D.C. MCC 1,125-volt 0.C.

station batteries IP and lN and 2 full capacity chargers.

TRAIN "B" consisting of 250/125-volt D.C. MCC 2,125-volt D.C.

station batteries 2P and 2N and 2 full capacity chargers.

I APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION: -

a. With only one 125-volt D.C. bus of a 250/125 volt D.C. MCC OPERABLE, restore the inoperable bus to OPERABLE status within I

2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

b. With only one 125-volt D.C. battery or only one charger of one MCC OPERABLE, restore the inoperable battery or charger to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within

[ the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

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SURVEILLANCE REQUIREMENTS disconneci svdiches be+ ween redondan4- b ees 4.8.2.3.1 vEach D.C. bu train shall be detennined OPERABLE and energized -

with tie-breakers-open at least once per 7 days by verifying correct etiscennec+

}

sii4ch / breaker alignment end indicated power availability / frcrn 4hc charger and bauery, and vo t f og e on e bos cf greater won or ec3 cal to 26 voHs O.C.

4.8.2.3.2 Each 125-volt battery and charger shall be demonstrated OPERABLE:

a. At least once per 7 days by:verifyin;; th:t: I

-1. The ekctrolytc 1;;cl of ::ch piht cell i: beteen the minima and maximm kvci ir.dication :=rk:,

1. Verifying that the parameters in Table 4.B- 1 meet

+be colegery A timHs , anct 87012803s0 870121 PDR ADOCK 05000346 p PDR ll DAVIS-BESSE, UNIT 1 3/4 8-8

ADD TABLE 4.8-1 BATTERY SURVEILLANCE REQUIREMENTS CATEGORY A II) CATEGORYB(2)

Parameter Limits for each limits for each Allowable (3) designated pilot connected cell _ value for each cell connected cell Electrolyte > Minimum level > Minimum level Above top of Level indication mark, indication mark, plates, and < " 6bove and < h" above and not inaxiEum level maxiEum level overflowing indication mark indic,ation mark Float Voltage 1 2.33 volts 1 2.13 volts {b) > 2.07 volts t

Not more than

.020 belo,w the average of all 1 1.195~ connected ~ cells Specifig ) -> 1.200 Gravity ga Average of all Average of all connected cells connected. cells

> 1.205 1 1.195 (a) Corrected for electrolyte temperature and level.

(b) Corrected for average electrolyte temperature. ,

(1) For any Category A parameter (s) outside the limit (s) shown, the battery may be considered OPERABLE provided that within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> all the Category 8 measurements are taken and found to be within their allowable values, and provided all parameter (s) are restored to within limits within. the next 6 days.

(2) for any Category B para eter(s) outside the limit (s) shown, the battery cay be consic'ered CPERABLE provided that they are within their allowable values and provided the parameter (s) are restored to within limits within 7 days.

(3) Any Category B parameter not within its allewable value indicates an ,

inoperable battery. '

ELECTRICAL POWER SYSTEMS i SURVEILLANCE REQUIREMENTS (Continued)

2. voit o ten or Verif equdiing *otan tuttuy termimi129

• tis co flwt c*de.gc is yeater

2. The pilot ccli :pecific grevity, cer'redted to 77"i cad iu. c icui viy 6c icvci, m.

i c .. v.

3. The-p h t cell voltage 10 1,2.13 vel t:, and -

-4. The cycrcll bat 4 cry voltag: E ;,126 volts.

b. At leatrt-ence-per 02 day; by verifying that:-

-1 . The -vetage-efeh Connected 001' f C 1,2.l'3 vclt: ' ndcr-

-ficet-chergc and-ho: f.et decrc :cd merc than 0.10 velt: .

-from the value observed during the criginal cceptance pg gm, as . a..

• d -2. The :pecific gravity, corrected t 77*F and full electrolyte icvel, of each connected cell h : 1.20 and

-has-not decrea:cd more th:n 0.01 frem the vale: cb:crved 4ttr-ir.g the previcu; tc t, :nd

3. Thc cicctrclytc icvci cf coch cennccted ccli h bct cca

. thc minimum and maximum icvci indkathn . rk:.

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 or4 d eterioration, l

3. The. ress4.ooceq abnormal of cocn cell 2. The cell-to-cell and terminal connections are clean, cent and-rumina l k tight and coated with anti-corrosion material, r r connccko ns The battery charger will supply at least 475 amperes at a M.

i is ic55 * ^ minimum of 130 volts for at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

or equot to isc ( ic N hms, / d. At least ence per 18 months, during shutdown, by verifying that onct s the battery capacity is adequate to supply and maintain in CPERABLE status. all of the actual emergency loads for i hcur 4.he.

design duty c)cle, when the battery is subjected to a battery service test.ef-

~6 N ce s*molab:d

e. At least once per 60 months, during shutdown, by verifying that the battery capacity is at least 80% of the manufacturer's rating when subjected to a performance discharge test. A fs- Once per (,o month inluwlthis performance discharge test shall be performed ,ubsequent to the-may be perkmcJ *n is of 4he utisfactory completion of the rcquired battery service test.

F. 2nsetW B l OAVIS-BESSE, UNIT 1 3/4 8-9

^

Insert " A"

b. At least once.per.92 days and within 7 days after a battery discharge (battery terminal voltage below -110 volts), or battery overcharge (battery terminal voltage above 150 volts),by:

1. Verifying that the parameters in Table 4.8-1 meet the Category B limits,

2. Verifying there is no visible corrosion at either terminals or connectors, or the connection resistance of these items is less than ~150 x 10 6 ohms, and

3. Verifying that the average electrolyte temperature of .

every six4h connected cell is above 60 7 .

Il

~_~nsert s6 is months, during shutdou>n,

f. EveryYperformance discharge tests of battery capacity shall be given to any battery that snows signs of degradation or has reached 85% of the service life expected for the application. Degradati'n o

is indicated when the battery capacity drops more than 10% of rated capacity from its average on previous performance tests, or is below 90% of the manufacturer's rating.

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ELECTRICAL POWER SYSTEMS 0.C. DISTRIBUTION - SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.2.4 As a minimum, the following D.C. electrical equipment and bus shall be energized and OPERABLE:

1 - 250/125-volt D.C. MCC, and 2 - 125-volt battery banks and chargers supplying the above O.C. MCC. .

APPLICABILITY: MODES 5 and 6.

ACTION:

With less than the above complement of D.C. equipment and bus OPERABLE, establish CONTAINMENT INTEGRITY within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

SURVEILLANCE REQUIREMENTS 4.8.2.4.1 The above required 250/125-volt D.C. MCC shall be determined OPERABLE and energized at least once per 7 days by verifying correct disconnect s d. t c h / breaker alignment,9fd indicated p0Wer availabilityp frem We, charger and bouery, (us ct vcit oge on +he cus of greater U1an er egttoi to l25 ve n ts D. C .

4.8.2.4.2 The above required 125-volt battery banks and chargers shall be demonstrated OPERABLE per Surveillance Requirement 4.8.2.3.2.

DAVIS-BESSE, UNIT 1 3/4 8-10

3/4.8 ELECTRICAL POWER SYSTEMS BASES The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety related equipment required for 1) the safe shutdown of the facility and 2) the mitigation and control of e accident conditions within the facility. The mifimum specified indeph- I dent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR 50.

The ACTION requirenents specified for the levels of degradation of the power sources provide restriction upon continued facility operation connensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least one of each of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that il the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumen-tation and control capability is available for monitoring maintaining l the facility status. g Inser t

• C "

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DAVIS-BESSE, UNIT I B 3/4 8-1 -

_--._,_,-.,__y., , . . _ . _ , , - . . , - _ . --

4 INSERT'C' The Surveillance Requirements for demonstrating the OPERABILITY of the station batteries are based on the recommendations of Regulatory Guide 1.129, 'Haintenance Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std. 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."

Verifying average electrolyte temperature above the minimum fer which the battery was sized, total battery terminal voltage on float charge, connec-tion resistance values 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 4.8-1 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage and specific gravity. The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and .015 below the manufacturer's full charge specific gravity is characteristic of a charged cell with adequate capacity. The normal limits for each connected cell for float voltage and specific gravity, greater than 2.13 volts and not more ths.n

.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells not more than .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 4.8-1 is permitted for up to seven days. During this seven-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 .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 .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 cell's float voltage, greater than 2.07 volts, ensures the battery's capability to perform its design function. ,

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