Text

Tech Spec Pages for Issuance of License Amendment, DC Electric Power Sources Based on TSTF-360
	ML030300630
Person / Time
Site:	Limerick
Issue date:	01/29/2003
From:	; NRC/NRR/DLPM
To:	;
References
	TAC MB5257, TAC MB5258
	Download: ML030300630 (30)
	v • d • e

F1 FCTRICAI POWER

"ýYýTF" 3/4 8.2 D.C.

SOURCES D.C.

SOURCES - OPERATING I

TMTTING CONJDTTIOIJ FflR OPFRAT ION a minimum, the folloning D.C. electrical power sources shall be

a.

Division 1, Consisting of:

1.

125-Volt Battery 1A1 (IAID101).

2.

125-Volt Battery 1A2 (IA2D101).

3.

125-Volt Battery Charger IBCA1 (HAMDM03).

4.

125-Volt Battery Charger IBCA2 (1A2D103).

b.

Division 2, Consisting of:

1.

125-Volt Battery 1B1 (IBID101).

2.

125-Volt Battery 1B2 (1B2D101).

3.

125-Volt Battery Charger 1BCB1 (IBID103).

4.

125-Volt Battery Charger 1BCB2 (1B2D103).

c.

Division 3, Consisting of:

1.

125-Volt Battery IC (ICD101).

2.

125-Volt Battery Charger 1BCC (1CD103).

d.

Division 4, Consisting of:

1.

125-Volt Battery 1D (1DD101).

2.

125-Volt Battery Charger IBCD (1DD103).

APPLICABILITY:

OPERATIONAL CONDITIONS 1, 2, and 3.

ACTION:

a.

With one or two battery chargers on one division inoperable:

1.

Restore battery terminal voltage to greater than or equal estaolished flnat voltaqe qithin 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , to the minimum 2 erify associated DiviSIn 1 or 2 float current < 2 amps, or Division 3 or 4 f2 oat current < I amp ;.1thi.

18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months and once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter, and

3.

Restore battery charger(s) to OPERABLE status within 7 days.

b.

With one or more batteries inoperable due to:

1.

One or two batteries on one division with one or more battery cells float voltage < 2.07 volts, perform 4.8.2.1.a.1 and 4.8.2.1.a.2 within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for affected battery(s) and restore affected cell(s) voltage

> 2.07 volts within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

2.

Division I or 2 with float current > 2 amps, or with Division 3 or 4 with float current > 1 amp, perform 4.8.2.1.a.2 within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for affected battery(s) and restore battery float current to within limits within 18 "ours.

Amendment No. 164 3.8.2.1 As OPERABLE:

3/4 8-10 LIMERICK -

UNIT I

ELECTRICAL POWER SYSTEMS LIMITTNG CONDITION FOR OPERATION ACTION:

(Continued)

3.

One or two batteries on one division with one or more cells electrolyte level less than minimum established design limits, if electrolyte level was below the top of the plates restore electrolyte level to above top of plates within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months and verify no evidence of leakage(*) within 12 nours.

In all cases, restore electrolyte level to greater than or, equal to minimum established design limits within 31 days.

4.

One or two batteries on one division with temperature less than minimum established pilot cell temperature to greater than or design limits within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

pilot cell electrolyte design limits, restore battery equal to minimum established

5.

Batteries in more than one division affected, restore battery parameters for all batteries in all but one division to within limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

6.

Mi) Any battery having both (Action b.1) one or more battery cells float voltage < 2.07 volts and (Action b.2) float current not within limits, and/or (ii) Any battery not meeting any Action b.1 through b.5, Restore the battery parameters to within limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

c.

With any battery(les) on one division of the above required D.C. electrical power sources inoperable for reasons other than Action b.,

restore the inoperable division battery to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Otnerwise, be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Contrary to the provisions of Specification 3.0.2, if electrolyte level was below the top of the plates, the verification that there is no evidence of leakage is required to be completed regardless of when electrolyte level is restored.

LAmendment No. 164 1 LIMERICK - UNIT I 3/4 8-10a

ELCTDIC2L DOE 5URVELLLAN C E- -

LRE ENT:....

4.8.2.1 Each of the above required division batteries and chargers shall be demonstrated OPERABLE:

a.

At least once pEr 7 days by verifying that:

1.

Each Division 1 and 2 battery float current is < 2 amps, and Division 3 and A battery float current is

< I amp when battery terminal voltage is greater than or equal to the minimum established float voltage of 4.8.2.1.a.2, and

2.

Total battery terminal voltage for each 125-volt battery is greater than or equal to the minimum established float voltage.

b.

At least once per 31 days by verifying that:

1.

Each battery pilot cell voltage is ? 2.07 volts,

2.

Each battery connected cell electrolyte level is greater than or equal to minimum established design limits, and

3.

The electrolyte temperature of each pilot cell is greater than or equal to minimum established design limits.

c.

At least once per 92 days by verifying that each battery connected cell voltage is

> 2.07 volts.

d.

At least once per 24 months by verifying that:

1.

The battery chargers will supply the greater than or equal to the minimum voltage for at least 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

Charger IBCA1 1BCA2 IBCB1 1BCB2 1BCC 1BCD currents listed below at established float Current (Amperes) 300 300 300 300 75 75

2.

The battery capacity is adequate to supply and maintain in OPERABLE status the required emergency loads for the design duty cycle when subjected to a battery service test.

LIMERICK - UNIT I 3/4 8-11 Amendment No.

4, 421,164 Corrected by letter dated June 19, 1995 I

ELECTRICAL POWER SYSTEMS SURVEILLANCE REOUIREMENTS (Continued)

e.

At least once per 60 months by verifying that the battery capacity is at least 80% of the manufacturer's rating when subjected to a performance discharge test or modified performance discharge test.

The modified performance discharge test may be performed in lieu of the battery service test (Specification 4.8.2.1.d.2).

f.

Performance discharge tests or modified performance discharge tests of battery capacity shall be given as follows:

1.

At least once per 12 months when:

(a)

The battery shows degradation or (b)

The battery has reached 85% of expected life with battery capacity < 100% of manufacturer's rating, and

2.

At least once per 24 months when battery has reached 85% of expected life with battery capacity

100% of manufacturer's rating.

LIMERICK - UNIT 1 3/4 8-12 Amendment No.

-4, 42,164 Corrected by letter dated June 19, 1995

TABLE 4.8.2.1-1 (DELETED)

THE !NFORM&TIOll ON THIS PAGE HAS BEEN DELETED Amendment No. 24, 164 3/4 8-13 LIMERICK - UNIT I

ELECTRC-"

S'YSTENS D.C.

SOURCES -

SHUTDOWN LIMITING CONDITION FOR OPERATIOON 3.8.2.2 As a minimum, two of the folloeirg four divisions of the D.C.

electrical power sources system snail be OPERABLE.l-n:

a.

Division 1, Consisting

1.

125-Volt Battery

2.

125-Volt Battery

3.

125-Volt Battery

4.

125-Volt Battery

b.

Division 2, Consisting

1.

125-Volt Battery

2.

125-Volt Battery

3.

125-Volt Battery

4.

125-Volt Battery C.

Division 3, Consisting

1.

125-Volt Battery

2.

125-Volt Battery of:

lAI (iAIlOl).

1A2 (I,2D1O1).

Charger IBCAI (1AID103).

Charger 1BCA2 (IA2D103).

of:

IBi (IBIDIOI).

1B2 (IB2D1O1).

Charger IBCBI (IB1DIO3).

Charger 1BCB2 (1B2D103).

of:

IC (]CD101).

Charger 1BCC (1CD103).

d.

Division 4, Consisting of:

1.

125-Volt Battery ID (1DD101).

2.

125-Volt Battery Charger iBCD (1DD103).

APPLICABILITY:

OPERATIONAL CONDITIONS 4, 5, and

ACTION:

a.

With one or two required battery chargers on one required division inoperable:

1. Restore battery terminal voltage to greater than or equal to the minimum established float voltage aithin 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ,

2.

Verify associated Divisior 1 or 2 float current S 2 amps, or Division 3 or 4 float current : 1 amp within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months and once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter, and

3.

Restore battery charger(s) to OPERABLE status within 7 days.

b.

With one or more required batteries inoperable due to:

1. One or two batteries on one division with one or more battery cells float voltage < 2.07 volts, perform 4.8.2.1.a.1 and 4.8.2.1.a.2 within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for affected battery(s) and restore affected cell(s) voltage 2 2.07 volts within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

When handling irradiated fuel in the secondary containment.

Amendment No. 164 LIMERICK - UNIT I 3/4 8-14

ELECTRICAL P3.,'ER SYSTEM"S IIMITING CONDITION FOR OPERATTON (Con.int, ed)

ACTION:

(Continued)

2.

Div sion 1 o r 2 0

,oa t r

,r-

> 2 s,

D

,,i i v iisin 3 or 4

c. at cI rr ;

-, e.

. 2..

I 3.

ýItni',

2 hOurs for affected battertr s ard rest.re A Lt7e y f, I-:

-jrrent tc within limits 1, tn 1 r.

0L, r

3.

Ore or t-,.o :- ae,ies o'" ore 0

r s-cr,:

r r

e cIlls electrolyte 1,ev2' Iest tiarn

-ir -i"m es:a.D' sne- ýe -"g'5 l tS, if electrolyte level was below the top.of the p ates restore electrolyte level to above top of plates v, ithin 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months and verify no evidence of leakage(*) within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

In all cases, restore electrolyte level to greater than or equal to minimum estaDlished design limits within 31 days.

4.

One or two batteries on one division with pilot cell electrolyte temperature less than mlnimum established design limits, restore battery pilot cell temperature to greater than or equal to minimum establisned design iimits witnin 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

5.

Batteries in more than one division affected, restore battery parameters for all batteries in one division to within limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

6.

Mi) Any battery having both (Action b.1) one or more battery cells float voltage < 2.07 volts and (Action b.2) float current not within limits, and/or (ii)

Any battery not meeting any Action b.1 through b.5, Restore the battery parameters to within limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

c.

1.

With the requiremerts of Action a. and/or Action b.

not met, or

2.

With less than two divisions of the above required D.C. electrical power sources ODERABLE for reasons otner thar Actions a. and/or b.,

Suspend CORE ALTERATIONS, handling of irradiated fuel in the secondary containment and operations with a potential for draining the reactor vessel.

d.

The provisions of Specification 3.0.3 are not applicable.

SURVEILLANCE REOUIREMENTS 4.8.2.2 At least the above required battery and charger shall be demonstrated OPERABLE per Surveillance Requirement 4.8.2.1.

(*)

Contrary to the provisions of Specification 3.0.2, if electrolyte level was below the top of the plates, the verifrcation that there is no evidence of leakage is required to be completed regardless of when electrolyte level is restored.

I TMFIRrF -

UNIT 1 3/4 8-14a A-A,--*

"T-1,

=1' 1 I

t:J II I I LI::III.U I

'I

3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1. 3/4.8.2. and 3/4 8.3 A.C.

SOURCES, D C. SOURCES, and ONSITE POWER DISTRIBUTION SYSTEMS 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 accident conditions within the facility.

The minimum specified independent 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 Part 50.

An offsite power source consists of all breakers, transformers, switches, interrupting devices, cabling, and controls required to transmit power from the offsite transmission network to the onsite Class 1E emergency bus or buses.

The determination of the OPERABILITY of an offsite source of power can be made using three factors, that when taken together, describe the design basis calculation requirements for voltage regulation.

The combination of these factors, described below, ensures that the offsite source(s), which provide power to the plant emergency buses, will be fully capable of supporting the equipment required to achieve and maintain safe shutdown during postulated accidents and transients.

An offsite source of electrical power is considered OPERABLE if it is within the bounds of analyzed conditions.

The most limiting analysis provides the following bounds:

1. The Startup Transformer (#10 and/or #20)

Load Tap Changer(s) (LTC) are in service and in automatic operation,

2. offsite source grid voltages are maintained above 218.5 kV on the 230 kV system and 498 kV on the 525 kV networks,

3. electrical buses and breaker alignments (13 kV and 4 kV) are maintained within the bounds of approved plant procedures.

Based on specific design analysis, variations to any of these parameters can be determined, usually at the sacrifice of another parameter, based on plant conditions.

Specifics regarding these variations must be controlled by plant procedures or by operability determinations, backed by specific design calculations.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation.

The OPERABILITY of the power sources are con sistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least two of the onsite A.C.

and the corresponding 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. or D.C. source.

At least two onsite A.C. and their corresponding D.C. power sources and distribution systems providing power for at least two ECCS divisions (I Core Spray loop, 1 LPCI pump and 1 RHR pump in suppression pool cooling) are required for design basis accident mitigation as discussed in UFSAR Table 6.3-3.

Under Modes 1, 2 and 3, an offsite circuit is considered to be inoperable if it is not capable of supplying at least three Unit 1 4 kV emergency buses.

If both offsite sources are capable of supplying LIMERICK - UNIT 1 B 3/4 8-1 Amendment No.

=, 4-n,164 ECP go

@9P37, EC9 99 0C902

314.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1. 3/4.8.2. and 3/4.8.3 A.C.

SOURCES.

D.C.

SOURCES.

and ONSITE POWER DISTRIBUTION SYSTEMS only three Unit 1 4 kV emergency buses, then each of the four Unit 1 4 kV emergency buses must be supplied from at least one operable offsite source.

Onsite A.C. operability requirements for common systems such as RHRSW and ESW are addressed in the appropriate system specification action statements.

The A.C. source allowable out-of-service times are based on Regulatory Guide 1.93, "Availability of Electrical Power Sources," December 1974.

When one or more diesel generators are inoperable, there is an additional ACTION requirement to verify that all required systems, subsystems, trains, components, and devices, that depend on the remaining OPERABLE diesel generators as a source of emergency power, are also OPERABLE.

The LPCI mode of the RHR system is considered a four train system, of which only two trains are required.

The verification for LPCI is not required until two diesel generators are inoperable.

This requirement is intended to provide assurance that a loss-of-offsite power event will not result in a complete loss of safety function of critical systems during the period when one or more of the diesel generators is inoperable.

The term verify as used in this context means to administratively check by examining logs or other information to determine if certain components are out-of-service for maintenance or other reasons.

It does not mean to perform the surveillance requirements needed to demonstrate the OPERABILITY of the component.

With one division with one or two battery chargers inoperable (e.g., the voltage limit of 4.8.2.1.a.2 is not maintained), the ACTIONS provide a tiered response that focuses on returning the battery to the fully charged state and r-estoring a fully qualified charger to OPERABLE status in a reasonable time period.

Action a.1 requires that the battery terminal voltage be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

This time provides for returning the inoperable charger to OPERABLE status or providing an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage.

Restoring the battery terminal voltage to greater than or equal to the minimum established float voltage provides good assurance that, within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months , the battery will be restored to its fully charged condition (Action a.2) from any discharge that might have occurred due to the charger inoperability.

A discharged battery having terminal voltage of at least the minimum established float voltage indicates that the battery is on the exponential charging current portion (the second part) of its recharge cycle.

The time to return a battery to its fully charged state under this condition is simply a function of the amount of the previous discharge and the recharge characteristic of the battery.

Thus there is good assurance of fully recharging the battery within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months , avoiding a premature shutdown with its own attendant risk.

If established battery terminal float voltage cannot be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , and the charger is not operating in the current-limiting mode, a faulty charger is indicated.

A faulty charger that is incapable of maintaining established battery terminal float voltage does not provide assurance that it can revert to and operate properly in the current limit mode that is necessary during the recovery period following a battery discharge event that the DC system is designed for.

Amendment No. 164 LIMERICK - UNIT 1 B 3/4 8-1a r

go 0092--7, N.,r 9a9-9968,

3/4.8 ELECTRICAL POWER SYSTEMS A.C.

SOURCES, D.C.

SOURCES, and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery is partially discharged and its capacity margins will be reduced.

The time to return the battery to its fully charged condition in this case is a function of the battery charger capacity, the amount of loads on the associated DC system, the amount of the previous discharge, and the recharge characteristic of the battery.

The charge time can be extensive, and there is not adequate assurance that it can be recharged within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months (Action a.2).

Action a.2 requires that the battery float current be verified for Divisions 1 and 2 as < 2 amps, and for Divisions 3 and 4 as < 1 amp.

This indicates that, if the battery had been discharged as the result of the inoperable battery charger, it has now been fully recharged.

If at the expiration of the initial 18 hour2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months period the battery float current is not within limits this indicates there may be additional battery problems.

Action a.3 limits the restoration time for the inoperable battery charger to 7 days.

This action is applicable if an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage has been used (e.g., balance of plant non-Class 1E battery charger).

The 7 days reflects a reasonable time to effect restoration of the qualified battery charger to OPERABLE status.

With one or more cells in one or more batteries in one division < 2.07 V, the battery cell is degraded.

Per Action b.1, within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , verification of the required battery charger OPERABILITY is made by monitoring the battery terminal voltage (4.8.2.1.a.2) and of the overall battery state of charge by monitoring the battery float charge current (4.8.2.1.a.1).

This assures that there is still sufficient battery capacity to perform the intended function.

Therefore, with one or more cells in one or more batteries < 2.07 V, continued operation is permitted for a limited period up to 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Division I or 2 with float current -

2 amps, or Division 3 or 4 with float current

> I amp, indicates that a partial discharge of the battery capacity has occurred.

This may be due to a temporary loss of a battery charger or possibly due to one or more battery cells in a low voltage condition reflecting some loss of capacity.

Per Action b.2, witnin 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verification of the required battery charger OPERABILITY is made by monitoring the battery terminal voltage.

Since Actions b.1 and b.2 only specify "perform," a failure of 4.8.2.1.a.1 or 4.8.2.1.a.2 acceptance criteria does not result in this Action not being met.

However, if one of the Surveillance Requirements is failed the appropriate Action(s),

depending on the cause of the failures, is also entered.

If the Action b.2 condition is due to one or more cells in a low voltage condition but still greater than 2.07 V and float voltage is found to be satisfactory, this is not indication of a substantially discharged battery and 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months is a reasonable time prior to declaring the battery inoperable.

With one or more batteries in one division with one or more cells electrolyte level above the top of the plates, but below the minimum established design limits, the battery still retains sufficient capacity to perform the intended function.

Per Action b.3, within 31 days the minimum established design limits for electrolyte level must be re-established.

Amendment No.

164 LIMERICK - UNIT I B 3/4 8-1b Up nQ QQQ22,

ECD, 1

3/4.8 ELECTRICAL POWER SYSTEMS BAESS A.C.

SOURCES.

D.C.

SOURCES, and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

With electrolyte level below the top of the plates there is a potential for dryout and plate degradation.

Action b.3 addresses this potential (as well as provisions in Specification 6.8.4.h, "Battery Monitoring and Maintenance Program").

Within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months level is required to be restored to above the top of the plates.

The Action requirement to verify that there is no leakage by visual inspection and the Specification 6.8.4.h item to initiate action to equalize and test in accordance with manufacturer's recommendation are taken from Annex D of IEEE Standard 450-1995.

They are performed following the restoration of the electrolyte level to above the top of the plates.

Based on the results of the manufacturer's recommended testing the battery may have to be declared inoperable and the affected cell(s) replaced.

Per Action b.4, with one or more batteries in one division with pilot cell temperature less than the minimum established design limits, 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is allowed to restore the temperature to within limits.

A low electrolyte temperature limits the current and power available.

Since the battery is sized with margin, while battery capacity is degraded, sufficient capacity exists to perform the intended function and the affecteo battery i, not required to be considered inoperable solely as a result of the pilot cell temperature not met.

Per Action b.5, with one or more batteries in more than one division with battery parameters not within limits there is not sufficient assurance that battery capacity has not been affected to the degree that the batteries can still perform their required function, given that multiple divisions are involved.

With multiple divisions involved, this potential could result in a total loss of function on multiple systems that rely upon the batteries.

The longer restoration times specified for battery parameters on one division not within limits are therefore not appropriate, and the parameters must be restored to within limits on all but one division within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

When any battery parameter is outside the allowances of Actions b.1, b.2, b.3, b.4, or b.5, sufficient capacity to supply the maximum expected load requirement is not ensured and a 2 hou restoration time is appropriate.

Additionally, discovering one or more batteries in one division with one or more battery cells float voltage less than 2.07 V and float current greater than limits indicates that the battery capacity may not be sufficient to perform the intended functions.

The battery must therefore be restored within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that (1) the facility can be maintained in the shutdown or refueling condition for extended time periods and (2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status. Under Modes 4, 5 and *, an offsite source is considered operable if it is capable of supplying all 4 kV emergency buses necessary for operating in that Mode.

The surveillance requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guide 1.9, "Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10, 1971, Regulatory Guide 1.137 "Fuel-Oil Systems for Standby Diesel Generators," Revision 1, October 1979 and Regulatory Guide 1.108, Amendment No. 164 L ER go UI 1B / 8iE 0U 00.07, r096 I

LIMERICK - UNIT I B 3/4 8-1c

ELECTRICAL POWER SYSTEMS BASES A C. SOURCES.

D.C.

SOURCES, and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

"Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977 except for paragraphs C.2.a(3), C.2.c(I), C.2.c(2), C.2.d(3) and C.2.d(4), and the periodic testing will be performed at least once per 24 months.

The exceptions to Regulatory Guide 1.108 allow for gradual loading of diesel generators during testing and decreased surveillance test frequencies (in response to Generic Letter 84-15).

The single largest post-accident load on each diesel generator is the RHR pump.

The Surveillance Requirement for removal of accumulated water from the fuel oil storage tanks is for preventive maintenance.

The presence of water does not necessarily represent failure of the Surveillance Requirement, provided the accumulated water is removed during performance of the Surveillance.

Accumulated water in the fuel oil storage tanks constitutes a collection of water at a level that can be consistently and reliably measured.

The minimum level at which accumulated water can be consistently and reliably measured in the fuel oil storage tank sump is 0.25 inches.

Microbiological fouling is a major cause of fuel oil degradation.

There are numerous bacteria that can grow in fuel oil and cause fouling, but all must have a water environment in order to survive.

Removal of accumulated water from the fuel storage tanks once every (31) days eliminates the necessary environment for bacterial survival.

This is the most effective means of controlling microbiological fouling.

In addition, it eliminates the potential for water entrainment in the fuel oil during DG operation.

Water may come from any of several sources, including condensation, ground water, rain water, contaminated fuel oil, and from breakdown of the fuel oil by bacteria.

Frequent checking for and removal of accumulated water minimizes fouling and provides data regarding the watertight integrity of the fuel oil system.

The Surveillance Frequencies are established by Regulatory Guide 1.137.

The surveillance requirements for demonstrating the OPERABILITY of the units batteries are in accordance with the recommendations of IEEE Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications."

Verifying battery float current while on float charge (4.8.2.1.a.1) is used to determine the state of charge of the battery.

Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery and maintain the battery in a charged state.

The float current requirements are based on the float current indicative of a charged battery.

Use of float current to determine the state of charge of the battery is consistent with IEEE Standard 450-1995.

The 7 day Frequency is consistent with IEEE Standard 450-1995.

This Surveillance Requirement (4.8.2.1.a.1) states the float current requirement is not required to be met when battery terminal voltage is less than the minimum established float voltage of 4.8.2.1.a.2.

When this float voltage is not maintained, the Actions of 3.8.2.1 Action a., provides the necessary and appropriate verifications of the battery condition.

Furthermore, the float current limits are established based on the float voltage range and is not directly applicable when this voltage is not maintained.

LIMERICK - UNIT 1 B 3/4 8-2 Amendment No. 4-,

-74, 4-2-1, 4-24,164 ECR 97 01057

EL ECTP!CAL POWER SSTEJIS BASES J~bRCEs.

n

,E DO, 9

DI-.*11"Tn' SYSTFý;1S (Continued)

A.C.

SOUPCES.

D.C.

SOURCES, -in ONSITE

E T)

S SC iern fyinz, per *.3.2.1

- .a

.2_, b

.*tty :erm-*

¢3ol tage ah', l on f'oat charge for the batteries relos to ensure-trie 2`C r

zatze-chargers.,Nrnich support the ability of the baýteries to oerfD

, -, r

_c :',czin.

Float crare is the condition in, rinich t'e crrger is

-r7 Zrtiruouls crage requirea to overcome the internal losses of battery,rd marar tter in a cnarged state while supplying the continuous steady sta.te loaos of t'e associated DC subsystem.

On float charge, battery cells will receive asequate currert to optimally charge the battery.

The voltage requirements are based on the mirimir float voltage established by the battery manufacturer (2.20 Vpc, average, or 132 V at tre battery terminals).

This voltage maintains the battery plates in a condition that supports maintaining tne grid life (expected to be approximately 20 years).

The 7 day Frequency is consistent with manufacturer recommendations and IEEE Standard 450-1995.

Surveillance Requirements 4.8.2.1.b.i and 4.8.2.1.c require verification that tihe cell float voltages are equal to or greater tran 2.07 V.

The Frequency for cell voltage verification every 31 days for pilot cell, and 92 days for each connected cell, is consistent with IEEE Standard 450-1995.

The limit specified in 4.3.2.1.b.2 for electrolyte level ensures that the plates suffer no physical damage and maintains adequate electron transfer capability.

The Frequency is consistent with IEEE Standard 450-1995.

Surveillance Requirement 4.8.2.1.b.3 verifies that the pilot cell temperature is greater than or equal To the minimum established design limit (i.e., 60 degrees Fahrenheit).

Pilot cell electrolyte temperature is maintained above this temperature to assure the battery can provide the required current and voltage to meet the design requirements.

Temperatures lower than assumed in battery sizing calculations act to inhibit or reduce battery capacity.

The Frequency is consistent with IEEE Standard 450 1995.

Surve!ilance Requirement 4.8.2.1.d.1 verifies tie design capacity of the battery chargers.

According to Regulatory Guide 1.32, the battery charger supply is recommended to be based on the largest combined demands of the various steady state loads and tne charging capacity to restore the battery from the oesign minimum charge state to the fully charged state, irresoect1i=e of the status of the unit during these demand occurrences.

Tne minimum requi red amperes and duration ensures that these requirements can be satisfied.

Surveillance Requirement 4.8.2.1.d.1 requires tnat each battery charger be capable of supplying the amps listed for the specified charger at the minimum established float voltage for 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

The ampere requirements are based on the output rating of the chargers.

The voltage requirements are based on the charger voltage level after a response to a loss of AC power.

This time period is sufficient for the charger temperature to have stabilized arid to have been maintained for at least 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

A battery service test, per 4.8.2.].d.2, is a special test of the battery's capability, as found, to satisfy the design requirements (battery duty cycle) of the DC electrical power system.

Tile discharge rate and test length corresponds to the design duty cycle requirements as specified in the UFSAR.

LIMEICK UNT 1 3/48-I Amendment No. 3,164 ECR 97 01057 B 3/4 8-2a LIMERICK - UNIT I

ELECTRICAL POWER SYSTEMS BASES A.C. SOURCES.

D.C.

SOURCES, and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

A battery performance discharge test (4.8.2.1.e and f) is a test of constant current capacity of a battery, normally done in the as found condition, after having been in service, to detect any change in the capacity determined by the acceptance test.

The test is intended to determine overall battery degradation due to age and usage.

Degradation (as used in 4.8.2.1.f) is indicated when the battery capacity drops more than 10% from its capacity on the previous performance test, or is below 90% of the manufacturer's rating.

Either the battery performance discharge test or the modified performance discharge test is acceptable for satisfying 4.8.2.1.e and 4.8.2.1.f; however, only the modified performance discharge test may be used to satisfy the battery service test requirements of 4.8.2.1.d.2.

Amendment No. 164 1

B 3/4 8-2b LIMERICK - UNIT I

ADMINISTRATIVE CONTROLS PROCEDURES AND PROGRAMS (Continued)

i.

Battery Monitoring and Maintenance Program This Program provides for restoration and maintenance, based on the recommendations of IEEE Standard 450, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries For Stationary Applications," of the following:

a.

Actions to restore battery cells with float voltage < 2.13 volts, and

b.

Actions to equalize and test battery cells that have been discovered with electrolyte level below the minimum established design limit.

Amendment No. 164 1

LIMERICK - UNIT 1 6-14d

ELFCTR'C4AL DO-E

$SlTc'3 3/4.8.2 D C. SOURCES D.C. SOURCES - OPEPATIN'G LIMI-ITI"IG CONDITTO0NJ FOP c4il a mi*ri mum,',tne f0

..,*,g D.C. -ectr

ca p1we1 - s--our -cI s snaIl be

a.

Division 1, Consist'ng

1.

125-Volt Battery

2.

125-Volt Battery

3.

125-Volt Battery

4.

125-Volt Battery

b.

Division 2, Consisting

1.

125-Volt Battery

2.

125-Volt Battery

3.

125-Volt Battery

4.

125-Volt Battery

c.

Division 3, Consisting

1.

125-Volt Battery

2.

125-Volt Battery

d.

Division 4, Consisting

1.

125-Volt Battery

2.

125-Volt Battery o f:

2A1 (241D101).

2A2 (2A2D101).

Charger 2BCA1 (2AID103).

Charger 2BCA2 (2A2D103).

of:

2B1 (2B1DIOI).

2B2 (2B2D101).

Charger 2BCBI (2BD103).

Charger 2BCB2 (2B2D103).

of:

2C (2CD101).

Charger 2BCC (2CD103).

of:

2D (2DD101).

Charger 2BCD (2DD103).

APPLICABILITY:

OPERATIONAL CONDITIONS 1, 2, and 3.

ACTION:

a.

With one or two battery chargers on one division inoperable:

1. Restore battery termiral voltage to greater than or equal establisned float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , to the minimum

2.

jerify associated Division I or 2 float current < 2 amps, or Division 3 or 4 float current < ] amp *iithir 18 nours and once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter, and

3.

Restore battery cnarger(s) to OPERABLE status within 7 days.

b.

With one or more batteries inoperable due to:

I.

One or two batteries on one division with one or more battery cells float voltage < 2.07 volts, perform 4.8.2.1.a.1 and 4.8.2.1.a.2 within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for affected battery(s) and restore affected cell(s) voltage

> 2.07 volts within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

2.

Division 1 or 2 with float current > 2 amps, or with Division 3 or 4 with float current > I amp, perform 4.8.2.1.a.2 within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for affected batteryts, and restore batter, float current to within limits within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months .

Amendment No. 126 3.8.2.1 As OPERABLE:

3/4 8-1I0 LIMERICK - UNIT 2

ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOP, OPERATION ACTION:

(Continuea)

3.

One or to batteries or -,ne dlvjS-z-n with one or more celis electrolyte level less zran mininuxr estabiisne.J aesigr limits, if electrolyte level

-,as oelow the top of.- e :ýIates re-Tore electrolyte level to above top of plates aithin 8 rours and verifv no evidence of leakage(k) within 12 "ours.

Ui al oases, restore e'ezroi te

-PIce to greater than or equal to mi nimum established design imi.s wit,7 in 31 days.

4.

One or two batteries on one division with oilot cell electrolyte temperature less than minimum established design limits, restore battery pilot cell temperature to greater than or equal to minimum established design limits within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

5.

Batteries in more than one division affected, restore battery parameters for all batteries in all but one division to within limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

6.

(1)

Any battery having both (Action b.l) one or more battery cells float voltage < 2.07 volts and (Action b.2) float current not within limits, and/or (ii)

Any battery not meeting any Action b.1 through b.5, Restore the battery parameters to within limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

c.

With any battery(ies) on one division of the above required D.C. electrical power sources inoperable for reasons other than Action b., restore the inoperable division battery to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Otherwise, be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

(*)

Contrary to the provisions of Specification 3.0.2, if electrolyte level was below the top of the plates, the verification that there is no evidence of leakage is required to be completed regardless of when electrolyte level is restored.

Amendment No. 126 1 3/4 8-1l0a LIMERICK - UNIT 2

ELECTPICAL PCEI SST-....

SU RVE1_LLA NCLR£LQUP!ME NELT S-__

4.8.2.1 Each of the above required division batteries and chargers shall be demonstrated OPERABLE:

a.

At least once pe-7 days by verifying Thae:

1.

Each Division I and 2 battery float current is < 2 amps, and Division 3 and 4 battery float current is

< I amp when battery terminal voltage is greater than or equal to the minimum established float voltage of 4.8.2.1.a.2. and

2.

Total battery terminal voltage for each 125-volt battery is greater than or equal to the minimum established float voltage.

b.

At least once per 31 days by verifying that:

1.

Each battery pilot cell voltage is

> 2.07 volts,

2.

Each battery connected cell electrolyte level is greater than or equal to minimum established design limits, and

3.

The electrolyte temperature of each pilot cell is greater than or equal to minimum established design limits.

c.

At least once per 92 days by verifying that each battery connected cell voltage is > 2.07 volts.

d.

At least once per 24 months by verifying that:

1.

The battery chargers will supply the currents iisted below at greater than or equal to the minimum established float voltage for at least 4 hour4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months s:

Charger Current (Amperes) 2BCA1 300 2BCA2 300 2BCB1 300 2BCB2 300 2BCC 75 2BCD 75

2.

The battery capacity is adequate to supply and maintain in OPERABLE status the required emergency loads for the design duty cycle when subjected to a battery service test.

LIMERICK UNIT 2 3/4 8-11 Amendment No.

34, 56, 126 Corrected by letter dated June 19, 1995

1 -CT1T CAL,'

SYSTE'VS SURVTLLN CE-REF0LifREM1EW LLn*~el

~

e.

At least once per 60 months by verifying that the battery capacity is at least 80% of the manufacturer's rating when subjected to a performance discharge test or modified performance discharge test.

Tne moaified performance discharge test may be performed in lieu of the battery service test (Specification 4.8.2.1.d.2).

f.

Performance discharge tests or modified performance discharge tests of battery capacity shall be given as follows:

1.

At least once per 12 months when:

(a)

The battery shows degradation or (b)

The battery has reached 85% of expected life with battery capacity

< 100% of manufacturer's rating, and

2.

At least once per 24 months when battery has reached 85% of expected life with battery capacity Ž 100% of manufacturer's rating.

LIMERICK -

UNIT 2 3/4 8-12 Amendment No.

8-4, 156,126 Corrected by letter dated June 19, 1995 J

I

TABLE 4 8 2.1-1 DEL:'-.

THE ],FOP;'QTON OH THE P.GE HAS BEEN DELETED Amendment No. 98,126 I

3/4 8-13 LIMERICK

-UNIT 2

ELECTRICAL POOER S:'STEMS D.C SOURCES -

SHUTDOWN LIMITING CONDITION FOR OPERATIOwi 3.8.2.2 As a minimum, two of the following four divis1ons 'f tne D.C.

electrical power sources system snail be OPERABLE w,itn:

a.

Division 1, Consisting

1.

125-Volt Battery

2.

125-Volt Battery

3.

125-Volt Battery

4.

125-Volt Battery

b.

Division 2, Consisting

1.

125-Volt Battery

2.

125-Volt Battery

3.

125-Volt Battery

4.

125-Volt Battery of:

2A1 (2AIDOI0).

2A2 (2A2DI01).

Charger 2BCAI (2A1DI03).

Charger 2BCA2 (2A2D]03).

of:

2B1 (2B]D101).

2B2 (2B2D1I01).

Charger 2BCB1 (2BID103).

Charger 2BCB2 (2B2D103).

c.

Division 3, Consisting of:

1.

125-Volt Battery 2C (2CD101).

2.

125-Volt Battery Charger 2BCC (2CD103).

d.

Division 4, Consisting of:

1.

125-Volt Battery 2D (2DD101).

2.

125-Volt Battery Charger 2BCD (2DD103).

APPLICABILITY:

OPERATIONAL CONDITIONS 4, 5, and

ACTION:

a.

With one or two required battery chargers on one required division inoperable:

1. Restore battery termiral voltage to greater than or equal to the minimum established foat voltage within 2 rours,

2.

Verify asscciated D', isior I or 2 float current : 2 amps, or Division 3 or 4 float current < 1 amp within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months and once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months tnereafter, and

3.

Restore battery crarger(s) to OPERABLE status within 7 days.

b.

With one or more required batteries inoperable due to:

1.

One or two batteries on one division with one or more battery cells float voltage < 2.07 volts, perform 4.8.2.1.a.1 and 4.8.2.1.a.2 within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for affected battery(s) and restore affected cell(s) voltage > 2.07 volts withir 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

- When handling irradiated fuel in the secondary containment.

Amendment No. 126 3/4 8-14 LIHIERICK - UNIT 2

7;CT1D-i, C YS7-:.IS LTMITING COa:JD.TIO OR P OPrDAT.'

ACTION:

(Continued)

,:*itaz c,

7

.2.Z

.2 2 rours for 7ff7 E.

Z b)a --te

'-V S,'es e oa-w'e'

-1re,-

-o ;

n in imi1t.s

-1r -' 0' 'OU"5.

3.

_re o

te S c-D re sr r-re S:

electrolyte,eve I ie _S -,*

n r'm,;

d e

.e 1 g r ni ts, if electrolyte level was be'o;. t'e te

-f the pl tes restore electrolyte level to above top of plates,^ltnir 8 hOLrS arnd verify no evidence of leakage(*) within 12 rours.

In all cases, restore electrolyte level to greater than or equal to minimium establisned design limits within 31 days.

4.

One or two batteries on one d'vision iv:th pilot cell electrolyte temperature Iess t~an minium established design limits, restore battery pilot cell temperature to greater tnan or equal to minimum established design limits within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

5.

Batteries in more than one division affected, restore battery parameters for all batteries in one division to wlthirn limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

6.

(i)

Any battery having botn (Action b.1) one or more battery cells float voltage < 2.07 volts and (Action b.2) float current not within limits, and/or (ii)

Any battery not meeting any Action b.1 through b.5, Restore the battery parameters to within limits within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

c.

1.

With the requirements of Action a anrd/or1 Action b. rot met, or

2.

With less than two divisions of the above required D.C. electrical power sources OPEPABLE for reasors otýer trar Actions a.

and/or b.,

Suspend CORE ALTERATIONS, handling of irradiated fuel in the secondary containment and operations with a potential for draining the reactor vessel.

d.

The provisions of Specification 3.0.3 are not applicable.

SURVEILL ANCE REOUTREMENTS 4.8.2.2 At least the above required batteries and chargers shall be demonstrated OPERABLE per Surveillance Requirement 4.8.2.1.

"(W)

Contrary to the provisions of Specification 3.0.2, if electrolyte level was below the top of the plates, the verification that there is no evidence of leakage is required to be completed regardless of when electrolyte level is restored.

Amendment No. 126 I

3/4 8-14a LIMERICK -

UNIT 2

,/4.8 ELECTRICAL POW;ER 3STE"S BASES 3/4.8 1, 3/4.8 2. and 3/4.8.3 A.C.

SOURCES D C. SORCES., and ONSITE POWJER DISTR!IPITION SYSTEMS The OPERABILITY of the A.C.

and D.C.

.,er scirces anc associated distribution systems during operation ensures that suffitient po.er will be available to supply the safe-y-repated equirien aeztjr,1ed for (1) the safe shutdown of the facility and (2) the mitigation ard ccntroi of accicent conditions within the facilitv.

Tne minimu,-m sDecif~ed independent and redundant A.C.

and D.C. power sources ano distriDution systems satisfy the requirements of General Design Criterion 17 of Appendix A to 10 CFR Part 50.

An offsite power source consists of all breakers, transformers, switches, interrupting devices, cabling, and controls required to transmit power from the offsite transmission network to the onsite Class IE emergency bus or buses.

The determination of the OPERABILITY of an offsite source of power can be made using three factors, that when taken together, describe the design basis calculation requirements for voltage regulation.

The combination of these factors, described below, ensures that the offsite source(s), which provide power to the plant emergency buses, will be fully capable of supporting the equipment required to achieve and maintain safe shutdown during postulated accidents and transients.

An offsite source of electrical power is considered OPERABLE if it is within the bounds of analyzed conditions.

The most limiting analysis provides the following bounds:

1. The Startup Transformer (#10 and/or #20)

Load Tap Changer(s)

(LTC) are in service and in automatic operation,

2. offsite source grid voltages are maintained above 218.5 kV on the 230 kV system and 498 kV on the 525 kV networks,

3. electrical buses and breaker alignments (13 kV and 4 kV) are maintained within the bounds of approved plant procedures.

Based on specific design analysis, variations to any of these parameters can be determined, usually at the sacrifice of another parameter, based on plant conditions.

Specifics regarding these variations must be controlled by plant procedures or by operability determinations, backed by specific design calculations.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation.

The OPERABILITY of the power sources are con sistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least two of the onsite A.C. and the corresponding 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. or D.C. source.

At least two onsite A.C.

and their corresponding D.C.

power sources and distribution systems providing power for at least two ECCS divisions (1 Core Spray loop, I LPCI pump and 1 RHR pump in suppression pool cooling) are required for design basis accident mitigation as discussed in UFSAR Table 6.3-3.

Under Modes 1, 2 and 3, an offsite circuit is considered to be inoperable if it is not capable of supplying at least three Unit 2 4 kV emergency buses.

If both offsite sourres are capable of supplying Amendment No. 126 LIMERICK - UNIT 2 B 3/4 8-1 EGR go 0937

=,

9982,

V/4 A FLECTRICAL POWER SYSTEMS BASES 3/4.8.1. 3/4 8 2. and 3/4.8.3 A C. SOURCES, D.C

SOIjPCFS, and Of1SITV POWER DISTRIBUTION SYSTEMS only three Unit 2 4 kV emergency buses, then e7.ch of ;he four Unit 2 4 kV emergency buses must be supplied from at least one operable offsite source.

Onsite A.C. operability requirements for common systems such as CREFAS,

SGTS, RHRSW and ES'J are addressed in the appropriate syste-m specification action statements.

The A.C. source allowable out-of-service times are based on Regulatory Guide 1.93, "Availability of Electrical Power Sources,"

December 1974. When one or more diesel generators are inoperable, there is an additional ACTION requirement to verify that all remaining required systems, subsystems, trains, components, and devices, that depend on the OPERABLE diesel generators as a source of emergency power, are also OPERABLE.

The LPCI mode of the RHR system is considered a four train system, of which only two trains are required.

The verification for LPCI is not required until two diesel generators are inoperable.

This requirement is intended to provide assurance that a loss-of-offsite dower event will not result in a complete loss of safety function of critical systems during the period when one or more of the diesel generators are inoperable. The term verify as used in this context means to administratively check by examining logs or other information to determine if certain components are out-of-service for maintenance or other reasons.

It does not mean to perform the surveillance requirements needed to demonstrate the OPERABILITY of the component.

With one division with one or two battery chargers inoperable (e.g., the voltage limit of 4.8.2.1.a.2 is not maintained), the ACTIONS provide a tiered response that focuses on returning the battery to the fully charged state and restoring a fully qualified charger to OPERABLE status in a reasonable time period.

Action a.1 requires that the battery terminal voltage be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

This time provides for returning the inoperable charger to OPERABLE status or providing an alternate means of restoring battery Lerminal voage to greater tran or equal to the minimum establisned float voltage.

Restoring the battery ter:mnal voltage to greater tnan or equal to tne mnlninum established float voltage provides nqod assurance that, within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months , the battery will be restored to its f1l1Y crarged condition (Action a.2) from any discharge that ni gnt have occurred due t-; the crarger inoperabillity.

A discharged battery having terminal voitage of at least the minimum established float voltage indicates th'at the battery is on the exponential charging current portion (the second part) of its recharge cycle.

The time to return a battery to its fully charged state under this condition is simply a function of the amount of the previous discharge and the recharge characteristic of the battery.

Thus there is good assurance of fully recharging the battery within 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months , avoiding a premature shutdown with its own attendant risk.

If established battery terminal float voltage cannot be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , and the charger is not operating in the current-limiting mode, a faulty charger is indicated.

A faulty charger that is incapable of maintaining established battery terminal float voltage does not provide assurance that it can revert to and operate prooerly in the current limit mode that is necessary during the recovery period followlng a battery discharge event that the DC system is aesigned for.

Amendment No. 126 I TMFRICK - IINIT 2 B 3/4 8-1a

[C, 00 00937,

[CR 99 69;82,

LCTR "I

C O,,,;'FR ý YST S

BASES A.C.

SOURCES, D.C.

SOURCES, and ONSITE POWER Q-STR!EUT!OQ'J SYSTEMS (Continued)

If the charer is operating i1 tne czLrre,

-imit nc-.-e.-`ter 2.-,,rs tnat is an indication that tne,;ttery is carslay d'scr3"a'ed anci its capaci't

'iargins w.viil be reduced.

The time to return tne battern

ýto f,;i*v chrgeconglition in this case is a function of toe battery crarger c=oa" ty, tre

_a,.,,-

o'

,ads on tne associated DC system, the amount of the. prevlous disc large, a-: t.-

r-eýna,-ze c'3 racteristic of the battery.

The charge time c3n oe e cersi :e,

- ' :*e-'e is oz, edeL, a:e %Isurance that it can be recharged witnir 18 nouLrs

-4ClCOn a.2).

Action a.2 requires that the battery float currernt be verified for Divisions i and 2 as < 2 amps, and for Divisions 3 and 4 as < I amp.

This ino*icates that, if the battery had been discharged as the result of the inoperable battery charger, it has now been fully recharged.

If at the expiration of tne initial 18 hour2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months period the battery float current is not within limits this indicates there may be additional battery problems.

Action a.3 limits tile restoration time for the inoperable battery charger to 7 days.

This action is applIcabie if a n alternate means of restoring battery terminal voltage to greater than or equal to tne minimum established float voltage has been used (e.g., balance of plant non-Class IE battery charger).

The 7 days reflects a reasonable time to effect restoration of the qualified battery charger to OPERABLE status.

With one or more cells in one or more batteries in one division < 2.07 V, the battery cell is degraded.

Per Action b.1, within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , verification of the required battery charger OPERABILITY is made by monitoring the battery terminal voltage (4.8.2.1.a.2) and of t.ie overall battery state of charge by monitoring the battery float charge current (4.8.2.1.a.1).

This assures that there is still sufficient battery capacity to perform the intended function.

Therefore, with one or more cells iii one or more batteries < 2.07 V, continued operation is permitted for a limited period up to 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Division 1 or 2 with float current > 2 amps, or Division 3 or 4 with float current

> I amp, irdicates tnat a partiali distharge of tne battery capacity has occurred.

This may be due to a temporary loss of a battery charger or possibly due to one or more battery cel's in.a

'Dv; voltage Ocnditior reflecting soae loss of caoacity.

Per Action b.2, w-tit'.n 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verlfrcatl r of t-'e required battery cnarger OPERABILITY is made by monitorirg the battery terrnna1 voltage Since Actiors b.i and b.2 only specify "perform," a failure of 4.8.2.1.a.1 or 4.8.2.1.a.2 acceptance criteria aoes not result in this Pction not being met.

However, if one of the Surveillance Requirements is failed the appropriate Action(s), depending on tne cause of the failures, is also entered.

If the Action b.2 condition is due to one or more cells in a low voltage condition but still greater than 2.07 V and float voltage Is found to be satisfactory, this is not indication of a substantially discharged battery and 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months is a reasonable time prior to declaring the battery inoperable.

With one or more batteries in one division with one or more cells electrolyte level above the top of the plates, but below the minimum estabilshed design limits, tile battery still retains sufficient capacity to perform the intended function.

Per Action b.3, within 31 days the minimum estab'ished design limits for electrolyte level must be re-established.

Amendment No. 126 LIMERICK - UNIT 2 B 3/4 8-1D

BASES A.C. SOURCES, D.C.

SOURCES, and OhSITE P,,R O1-Rj61TION SYSTEMS (Contnued) a,intd elecTroayte

,e

-e t.e-e re oe'7t-'

for dryout ard plate cegr3catior.

'"ct-7o dc12resses

, :ter,,

"as,,e as provi sions in SoecIf fcati on 6.8.4.t,, ".atter,

irg-arc '-siterarce

-c-a-"

,,,,,thin 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months

]eve is reql

,!re, to be r

atcve -:ne p3,2 ci

ne sares.

ye Action requirement to veri fy that there iss no ae3,

vi L.,a*I I

SOec'l arid

!"3 Soe :'i cati on 6.8.4.h item to 111t,ate action r to :

, and z

.Wri

.. C l -3rU'af aCturer' S reco*:nendatiOn are taken from AnneA D of IEEE Staroard.153-19c15.

Tney are performed cor_

anatiineareptaken eXpDatef fi 3o,*ing the restoration -f tne =eec.,oote e Je2e to: a oie t!f po of tre p ates Based on the results of the :nanufacturer's recOm-mended testing the battery may nave to be declared inoperable and tne affe-ted cel(s) replaced.

Per Action b.4, with one or more batteries in one division witn pilot cell temperature less than the minimum established design limits, 11 nours is allowed to restore the temperature to within limits.

A low electrolyte temoerature limits tne current and power available.

Sirce tne batter, is si7ed..nth margin, ;,nile battery capacity is degraded, sufficient capacity exi.ts to perform the intended function and the affected battery is not required to be considered inoperable solely as a result of the pilot cell temperature not met.

Per Action b.5, with one or more batteries in more than one division with battery parameters not within limits there is not sufficient assurance that battery capacity has not been affected to te degree that the batteries can still perform their required function, given that multiple divisions are involved.

With multiple divisions involved, this potential could result in a total loss of function on multiple systems that rely upon the batteries.

The longer restoration times specified for battery parameters on one division not witnin liits are therefore not appropriate, and tee parameters must be restored to within limits on all but one division within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

When any battery parameter is outside the allowances of Actions b.1, b.2, b.3, b.4, or b.5, sufficient capacity to supply the maximum expected load requirenment is not ensured and a 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months restoration time is :opropriate.

Additionally, discovering one or more batteries in one dliimorn it iea or 7,ore battery cells float voltage less than 2.07 V and float current greater tnan.firits indicates teat the battery capacity may not be sufficiert to perform t'e inteided furcticn1s.

The battery must therefore be restored

,i toin 2 nours The OPERABILITY of tne minimum specified A.C.

and D.C. power sources and associated distribution systems during shutdown and refueling ensures that (1) the facility can be maintained in the shutdown or refueling condition for extended time periods and (2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

Under Modes 4, 5

and *, an offsite source is considered operable if it is capable of supplying all 4 kV emergency buses necessary for operating in that Mode.

The surveillance requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guide 1.9, "Selection of Diesel Generator Set Capacity for Standby Power Amendment No. 126 LIMERICK - UNiT 2 B 3/4 8-1c

3* 8 ECT i'A

-" 's EASES A.C

SOUPCES, 0 C. SOURCES, ano O ;SIT- :),JER 2,ST*IUtJTiO' SYSTEMqS (Continued)

Supplies,,arch 10 1971, Recuit~or gu, do a : 0 r I.'s

-eTS or StandDy Diesel Generators.

Revision 1, 1079 a',

Recu'at'-

Go-de 1.1,3, "Periodic TestinQ of Diesel Generator Uni :s Usec as Onsl te E7-_c-,rc Dower Systems at Nuclear Power Plants, Revision 1 S,Llu-.s; :P7 excep: `:r Darag"eohs C 2.a(3). C.2.c(1),

C.2.c(2), C.2.d(3) and C.2. j-l.,

anc the Deriozic tes:inr;,%ill ne

.erfor.ed at least once per 24 rontns.

Tne ex-CPtro.cS :'o for gradual loading of iesel generators ouring testing ard cecreased s;rveil!ance test frecuencies (in response to Generic Letter 84-15).

The single.argest Dost-accident load on each diesel generator is the RHR Dump.

The Surveillance Requirement for removal of accumulated water from the fuel oil storage tanks is for preventive maintenance.

The presence of water does not necessarily represent failure of the Surveillance Requirement, provided the accumulated water is removed during performance of the Surveillance.

Accumulated water in the fuel oil storage tanks constitutes a collection of water at P level that can be consistently and reliably measured.