Text

Proposed Technical Specifications (TS) Amendments to Sections 3.8.4, DC Sources - Operating; 3.8.5 - DC Sources - Shutdown; and 3.8.6, Battery Cell Parameters and Associated TS Bases
	ML041050163
Person / Time
Site:	Catawba
Issue date:	04/06/2004
From:	Jamil D; Duke Power Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML041050163 (69)
	v • d • e

p Duke D.M. JAMIL

wPowere Vice President A Duke Energy Company Duke Power Catawba Nuclear Station 4800 Concord Rd. I CNOIVP York, SC 29745-9635 803 831 4251 803 831 3221 fax April 6, 2004 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555

Subject:

Duke Energy Corporation Catawba Nuclear Station (CNS), Units 1 and 2 Docket Numbers 50-413 and 50-414 Proposed Technical Specifications (TS) Amendments to Sections 3.8.4, "DC Sources - Operating"; 3.8.5 -

"DC Sources - Shutdown"; and 3.8.6, "Battery Cell Parameters" and Associated TS Bases Pursuant to 10 CFR 50.90, Duke is requesting amendments to Technical Specifications (TS) Sections 3.8.4, "DC Sources -

Operating"; 3.8.5 - "DC Sources - Shutdown"; and 3.8.6, "Battery Cell Parameters" and associated TS Bases. This amendment change will allow a Diesel Generator (DG) Battery to remain operable with no more than one cell less than 1.36 Volts DC (Vdc) on float charge.

These license amendment requests have been developed based on information obtained via the battery manufacturer's report which includes a technical justification, battery sizing calculations, and supporting documentation. All calculations in the report were done in accordance with IEEE Standard 1115-2000, "IEEE Recommended Practice for Sizing Nickel Cadmium Batteries for Stationary Applications".

Duke is requesting that the NRC review and approve the enclosed license amendment requests no later than September 2004 to more accurately reflect the actual impact of a single battery cell failure on the actual diesel generator operability. This revision will also minimize unnecessary entries into a TS action statement due to an overly conservative TS requirement. The reprinted pages will be provided to the NRC following the completion of the technical review of the proposed amendment.

Implementation of this amendment will require revising Section 18, "Aging Management Programs and Activities" of the Catawba (kocD www. duke-energy. corn

U.S. Nuclear Regulatory Commission Page 2 April 6, 2004 Safety Analysis Report (UFSAR) to reflect renumbered surveillance steps.

Duke Energy Corporation has determined that a 60-day implementation period would be preferred in order to revise surveillances with minimum impact on scheduling.

In accordance with Duke administrative procedures and the Quality Assurance Program Topical Report, the proposed amendment has been previously reviewed and approved by the CNS Plant Operations Review Committee and on an overall basis by the Duke Nuclear Safety Review Board.

The contents of this amendment request package are as follows:

1.Attachment 1 provides marked copies of the affected TS and TS Bases pages for Catawba showing the proposed changes.

2. Attachment 2 provides a description of the proposed changes and technical justification.

3. Pursuant to 10 CFR 50.92, Attachment 3 documents the determination that the amendments contain No Significant Hazards Considerations.

4. Pursuant to 10 CFR 51.22(c)(9), Attachment 4 provides the basis for the categorical exclusion from performing an Environmental Assessment/Impact Statement.

5.Attachment 5 contains the Manufacturer's Technical Justification, Battery Sizing Calculations, and Supporting Documentation.

Pursuant to 10 CFR 50.91, copies of these proposed amendments are being sent to the appropriate state officials.

There are no regulatory commitments contained in this letter or its attachments.

U.S. Nuclear Regulatory Commission Page 3 April 6, 2004 Inquiries on this matter should be directed to A.P Jackson at (803) 831-3742.

Very truly yours, Dhiaa M. Jam Site Vice President Catawba Nuclear Station APJ/apj Attachments

U.S. Nuclear Regulatory Commission Page 4 April 6, 2004 Dhiaa M. Jamil affirms that he is the person who subscribed his name to the foregoing statement, and that all the matters and facts set forth herein are true and correct to the best of his knowledge.

Dhiaa M. Jamil ite Vice President, Catawba Nuclear Subscribed and sworn to me: I 4 Date Notar Public My commission expires: 7-/O - P/a Date

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U.S. Nuclear Regulatory Commission Page 5 April 6, 2004 xc (with attachments):

L.A. Reyes U.S. Nuclear Regulatory Commission Regional Administrator, Region II Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, GA 30303 E.F. Guthrie Senior Resident Inspector (CNS)

U.S. Nuclear Regulatory Commission Catawba Nuclear Station S. E. Peters NRC Project Manager (CNS)

U. S. Nuclear Regulatory Commission Mail Stop 0-8 G9 Washington, DC 20555-0001 H. J. Porter, Director Division of Radioactive Waste Management Bureau of Land and Waste Management Department of Health and Environmental Control 2600 Bull St.

Columbia, SC 29201

ATTACHMENT 1 MARKED-UP TS AND TS BASES PAGES FOR CATAWBA

INSERTS Insert 1 for TS 3.8.6:

Battery cell parameters for the channels of DC batteries shall be within the limits of Table 3.8.6-1 and the Diesel Generator (DG) Train A and Train B batteries shall be within the limits of temperature, level, and voltage.

Insert 2 for TS 3.8.6:

OR One or more DG batteries with two or more connected cells < 1.36V.

Insert 3 for TS 3.8.6:

SR 3.8.6.5 Verify DG battery cell voltage 7 days I 2 1.36 V on float charge. I I Insert 4 for TS BASES 3.8.6:

This LCO delineates the limits on electrolyte temperature, level, float voltage, and specific gravity for the channels DC power source batteries. The LCO also addresses the trains of DC for the Diesel Generators limits on temperature, level, and float voltage. A discussion of these batteries and their OPERABILITY requirements is provided in the Bases for LCO 3.8.4, "DC Sources-Operating,"

and LCO 3.8.5, "DC Sources-Shutdown."

Insert 5 for TS BASES 3.8.6:

With one or more DG batteries with one or more battery cell(s) not within limits of level or temperature, sufficient capacity to supply the required load for the DG is not assumed, and the corresponding DC electrical power subsystem must be declared inoperable immediately. With one or more DG batteries with two or more battery cells not within limits of voltage, sufficient capacity to supply the required load for the DG is not assumed, and the corresponding DC electrical power subsystem must be declared inoperable immediately. Appropriate LCO(s) must then be entered for the DG supported by the inoperable DC subsystem.

If the plant is in MODES 1 through 4, LCO 3.8.1, "AC Sources

- Operating"f is required to be entered.

If the DG is required to support equipment during MODES 5 or 6 or movement of irradiated fuel assemblies, regardless of operating mode, LCO 3.8.2, "AC Sources - Shutdown" is the appropriate LCO.

Insert 6 for TS BASES 3.8.6:

SR 3.8.6.5 Verifying battery individual cell voltage while on float charge for the DG batteries ensures each cell is capable of supporting its intended function. Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery (or battery cell) and maintain the battery (or a battery cell) in a fully charged state. The battery cell voltage limit of 2 1.36 V is consistent with the nominal design voltage of the battery and is based on the manufacturer's recommended minimum float charge voltage for a fully charged cell with adequate capacity. The battery is designed and sized with a capacity margin sufficient to allow up to one cell to be fully degraded with a voltage < 1.36 V assuming that no cells are jumpered out. The battery sizing calculations account for a degraded cell by assuming the degraded cell undergoes a worst-case polarity reversal during a design discharge. For this surveillance, a minimum of two cells shall be tested every seven days. The cells selected for testing shall be rotated on a monthly basis.

The 7-day Frequency is consistent with the manufacturer's recommendations.

DC Sources - Operating 3.8.4 3.8 ELECTRICAL POWER SYSTEMS 3.8.4 DC Sources-Operating I

LCO 3.8.4 Four channels of DC electrical power subsystems and the Train A and Train B Diesel Generator (DG) DC electrical power subsystems shall be OPERABLE.

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

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One channel of DC A.1 Verify associated bus tie 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months electrical power breakers are closed subsystem inoperable. between DC channels.

AND A.2 Restore channel of DC 10 days electrical power subsystem to OPERABLE status.

B. Required Action and B.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months Associated Completion lime not met. AND B2 Be in MODE 5. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months C. One or more DG DC C.1 Enter applicable Immediately electrical power Condition(s) and Required subsystem(s) Action(s) of 1CO 3.8.1, inoperable. 'AC Sources - Operating'.

for the associated DG made inoperable.

(continued)

Catawba Units 1 and 2 3.8.4-1 Amendment Nos. 173/165

DC Sources - Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. A and/or D channel of D.1 Enter applicable Immediately DC electrical power Condition(s) and Required subsystem inoperable. Action(s) of LCO 3.8.9, "Distribution Systems-AND Operating", for the associated train of DC Associated train of DG electrical power distribution DC electrical power subsystem made subsystem inoperable. inoperable.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.4.1 Verify DC channel and DG battery terminal voltage is 7 days

> 125 V on float charge.

5R3.12Verify DGvbatteryo-voltage > .4 6A-on float chaFge. -7 A1....

Relocecie to -S,5 .6 4s hetw 4 .9 3,8. 6, 5 4- yeyvnber suvcess.-ve steps SR 3.8.4.< Verify no visible corrosion at the DC channel and DG 92 days battery terminals and connectors.

OR (For the DC channel only) Verify battery connection resistance of these items is < 1.5 E-4 ohm.

(continued)

Catawba Units 1 and 2 3.8.4-2 Amendment Nos. 4:&L1'65

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

-SURVEILLANCE FREQUENCY SR 3.8.4 4$5 Verify DC channel and DG battery cells, cell plates, and racks show no visual indication of physical damage or abnormal deterioration that could degrade battery 18 months perfornance.

18 months -

SR 3S8;. Remove visible terninal corrosion, verify DC channel ahd 18 months DG battery cell to cell and terminal connections are dean and tight, and are coated with anti-corrosion material.

SR 3.8.4. -Verify DC channel battery connection resistance is < 1.5 18 months 6 E4 ohm.

SR 3.8.4.' Verify each DC channel battery charger supplies 18 months

> 200 amps and the DG battery charger supplies > 75 (J amps with each charger at > 125 V for > 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months .

SR 3.8.4 -- NOTES

1. The modified performance discharge test in (iM SR 3.8.4. may be perforned in lieu of the serviced tin SR 3.8.4

2. This S illance shall not be performed for the DG batteries in MODE 1, 2, 3, or 4.

Verify DC channel and DG battery capacity is adequate 18 months to supply, and maintain in OPERABLE status, the required emergency loads for the design duty cycle when subjected to a battery service test.

(continued)

Catawba Units 1 and 2 3.8.4-3 Amendment Nos.-:O4I+97

DC Sources - Operating 3.8.4 EVAIRJFPII SI

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-It44 SURVEILLANCE N FREQUENCY sN SR 3.8k4 NOTE This Surveillance shall not be performed for the DG batteries in MODE 1, 2,3, or 4.

Verify DC channel and DG battery capacity is > 80% of 60 months

- the-manufactureresratingwhen subjected-loa- -

performance discharge test or a modified performance AND discharge test.

18 months when battery shows degradation or has reached 85% of expected life with capacity < 100%

of manufacturer's rating AND

-NOTE-Not applicable to DG batteries 24 months when battery has reached 85% of the expected life with capacity >

100% of manufacturers rating Catawba Units 1 and 2 3.8.4-4 Amendment Nos..8a4W7&-

DC Sources-Operating B 3.8.4 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.4 DC Sources-Operating BASES BACKGROUND The station DC electrical power system provides the AC emergency power system with control power. It also provides both motive and control power to selected safety related equipment and preferred AC vital bus power (via inverters). As required by 10 CFR 50, Appendix A, GDC 17 (Ref. 1), the DC electrical power system is designed to have sufficient independence, redundancy, and testability to perform its safety functions, assuming a single failure. The DC electrical power system also conforms to the recommendations of Regulatory Guide 1.6 (Ref. 2) and IEEE-308 (Ref. 3).

The 125 VDC electrical power system consists of four independent and redundant safety related Class 1E DC electrical power subsystems (Channels A, B, C, and D). Each channel consists of one 125 VDC battery (each battery is capable of supplying 2 channels of DC loads for a train), the associated battery charger(s) for each battery, and all the associated control equipment and interconnecting cabling.

There is one spare battery charger which provides backup service in the event that the preferred battery charger is out of service. If the spare battery charger is substituted for one of the preferred battery chargers, then the requirements of independence and redundancy between trains are maintained.

During normal operation, the 125 VDC load is powered from the battery chargers with the batteries floating on the system. In case of loss of normal power to the battery charger, the DC load is automatically powered from the station batteries.

The Channels A and D of DC electrical power subsystems or the Diesel Generator (DG) DC electrical power subsystems provide through auctioneering diode assemblies, the buses EDE for the A train and EDF for the B train to supply the control power for its associated Class 1E AC power load group, 4.16 kV switchgear, and 600 V load centers. The DC electrical power subsystems also provide DC electrical power to the inverters, which in turn power the AC vital buses.

Catawba Units 1 and 2 B 3.8.4-1 PRevision No. 0

DC Sources-Operating B 3.8.4 BASES BACKGROUND (continued)

The DC power distribution system is described in more detail in Bases for LCO 3.8.9, 'Distribution System-Operating," and LCO 3.8.10,

'Distribution Systems-Shutdown.'

Each 125 V vital DC battery (EBA, EBB, EBC, EBD) has adequate storage capacity to carry the required duty cycle of its own load group and the loads of another load group for a period of two hours. Each 125 V vital DC battery is also capable of supplying the anticipated momentary loads during this two hour period. The 125 V DC DG batteries have adequate storage capacity to carry the required duty cyde for 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Each 125 V vital DC battery is separately housed in a ventilated room apart from its charger and distnrbution centers. Each subsystem or channel is located in an area separated physically and electrically from the other subsystem to ensure that a single failure in one subsystem does not cause a failure in a redundant subsystem. There is no sharing between redundant Class 1E subsystems, such as batteries, battery chargers, or distribution panels, except for the spare battery charger which may be aligned to either train.

The batteries for each channel DC electrical power subsystems are sized to produce required capacity at 80% of nameplate rating, corresponding to warranted capacity at end of life cycles and the 100% design demand.

Battery size is based on 125% of required capacity. The voltage limit is 2.13 V per cell, which corresponds to a total minimum voltage output of 125 V per battery discussed in the UFSAR, Chapter 8 (Ref. 4). The criteria for sizing large lead storage batteries are defined in IEEE-485 (Ref. 5).

Each channel of DC electrical power subsystem has ample power output capacity for the steady state operation of connected loads required during normal operation, while at the same time maintaining its battery bank fully charged. Each battery charger also has sufficient capacity to restore the battery from the design minimum charge to its fully charged state within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months while supplying normal steady state loads discussed in the UFSAR, Chapter 8 (Ref. 4).

APPLICABLE The initial conditions of Design Basis Accident (DBA) and transient SAFETY ANALYSES analyses in the UFSAR, Chapter 6 (Ref. 6), and in the UFSAR, Chapter 15 (Ref. 7), assume that Engineered Safety Feature (ESF) systems are OPERABLE. The DC electrical power system provides Catawba Units 1 and 2 B 3.8.4-2 Revision No. 1

DC Sources-Operating B 3.8.4 BASES APPLICABLE SAFETY ANALYSES (continued) normal and emergency DC electrical powe`,or the DGs, emergency auxiliaries, and control and switching during all MODES of operation.

The OPERABILITY of the DC sources is consistent with the initial assumptions of the accident analyses and is based upon meeting the design basis of the unit. This includes maintaining the DC sources OPERABLE during accident conditions in the event of:

a. An assumed loss of all offsite AC power or all onsite AC power; and

b. -A worst case single failure.

The DC sources satisfy Criterion 3 of 10 CFR 50.36 (Ref. 8).

LCO The DC electrical power subsystems, each subsystem consisting of one battery, battery charger and the corresponding control equipment and interconnecting cabling supplying power to the associated bus within the train are required to be OPERABLE to ensure the availability of the required power to shut down the reactor and maintain it in a safe condition after an anticipated operational occurrence (AOO) or a postulated DBA. Loss of any train DC electrical power subsystem does not prevent the minimum safety function from being performed (Ref. 4).

An OPERABLE DC electrical power subsystem requires a battery and respective charger to be operating and connected to the associated DC bus.

APPLICABILITY The DC electrical power sources are required to be OPERABLE in MODES 1, 2, 3, and 4 to ensure safe unit operation and to ensure that:

a. Acceptable fuel design limits and reactor coolant pressure boundary limits are not exceeded as a result of AOOs or abnormal transients; and

b. Adequate core cooling is provided, and containment integrity and other vital functions are maintained in the event of a postulated DBA.

The DC electrical power requirements for MODES 5 and 6 are addressed in the Bases for LCO 3.8.5, 'DC Sources-Shutdown.

Catawba Units 1 and 2 B 3.8.4-3 Revision No. 0

DC Sources-Operating B 3.8.4 BASES ACTIONS A1 and A.2 Condition A represents the loss of one channel for a DC source. The inoperable channel must be energized from an OPERABLE source within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . The inoperable channel may be powered from that train's other DC channel battery by closing the bus tie breakers. Each channel battery is sized and tested to supply two channels of DC for a period of two hours, in the event of a postulated DBA. Being powered from an OPERABLE source, the inoperable channel must be returned to OPERABLE status within 10 days or the plant must be prepared for a safe and orderly shutdown. The spare battery charger (ECS), which must be powered from the same train which it is supplying, may be substituted for the channel's battery charger to maintain a fully OPERABLE channel. In this case, Condition A is not applicable.

B.1 and B.2 If the inoperable channel of DC electrical power subsystem cannot be restored to OPERABLE status within the required Completion Time, the unit must be brought to a MODE in which the LCO does not apply. To achieve this status, the unit must be brought to at least MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and to MODE 5 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . The allowed Completion Times are reasonable, based on operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging plant systems.

C.1 Condition C represents one train's loss of the ability to adequately supply the DG with the required DC power and the DG is inoperable. The DG is no longer capable of supplying the required 4.16 kV AC power and applicable Condition(s) and Required Action(s) for the AC sources must be entered immediately.

D.1 Being powered from auctioneering diode circuits from either the A channel of DC or the A Train of DG DC, distribution center EDE supplies breaker control power to the 4.16 kV AC and the 600 VAC switchgear, auxiliary feedwater pump controls, and other important DC loads. The EDF center is powered from the B Train of DG DC or the D channel of DC and provides DC power to Train B loads, similar to EDE center. With Catawba Units 1 and 2 8 3.8.4-4 PRevision No- 1

DC Sources-Operating B 3.8A BASES ACTIONS (continued) the loss of the channel DC power and tie associated DG DC power, the load center power for the train is inoperable and the Condition(s) and Required Action(s) for the Distn'bution Systems must be entered immediately.

SURVEILLANCE SR 3.8.4.1 REQUIREMENTS Verifying battery terminal voltage while on float charge for the batteries helps to ensure the effectiveness of the charging system and the ability of the batteries to perform their intended function. Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery (or battery cell) and maintain the battery (or a battery cell) in a fully charged state. The voltage requirements are based on the nominal design voltage of the battery and are consistent with the initial voltages assumed in the battery sizing calculations. The 7 day Frequency is consistent with manufacturer recommendations and IEEE-450 (Ref. 9).

SH 3.8.4.2 RZelocate -lo TrS 1j3 a 5 e.:

Verifying attery individuIcell voltage .' e on float charge for the OG Rev~se, odv L51?3

~-- bades ensures ai cell is cap btof supportingA fIr intended ftnction. Float-farge is thondition in whichthe charger is-pplying the conti u6is charge je uired to overcorrnthe internalls6ses of a batt Wor batte nd) and maintain tfge battery (Qr-a'battery celin<

f:t4 charged sfate. The voltagd*equirementsYre based onthe nominal design volage of the batt4y and are consisent with the-,eiiiiial voltages asscimed in the battde sizing calculations. For this-dGrveillance twjo different cells-siall be tested eat1 month. Tj eJday FrequencGs connfwith manufacturrecommendaions.

SR 3.8.4. )

For the DC channel batteries, visual inspection to detect corrosion of the battery terminals and connections, or measurement of the resistance of I each intercell, interrack, intertier, and terminal connection, provides an indication of physical damage or abnormal deterioration that could potentially degrade battery performance. The presence of visible corrosion does not necessarily represent a failure of this SR, provided an evaluation determines that the visible corrosion does not affect the OPERABILITY of the battery.

Catawba Units 1 and 2 B 3.8A4-5 Revision No. 4-

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE REQUIREMENTS (continued)

For the DG batteries, visual inspection to detect corrosion of the battery terminals and connections provides lan indication of physical damage or abnormal deterioration that could potentially degrade battery perfomnance. The presence of visible corrosion does not necessarily represent a failure of this SR, provided an evaluation determines that the visible corrosion does not affect the OPERABILITY of the battery.

The Surveillance Frequency for these inspections, Which can detect conditions that can cause power losses due to resistance heating, is 92 days. This Frequency is considered acceptable based on operating experience related to detecting corrosion trends.

For the DC channel batteries, visual inspection of the battery cells, cell plates, and battery racks provides an indication of physical damage or abnormal deterioration that could potentially degrade battery performance. The presence of physical damage or deterioration does not necessarily represent a failure of this SR, provided an evaluation determines that the physical damage or deterioration does not affect the OPERABILITY of the battery (its ability to perform its design function).

For the DG batteries, visual inspection of the battery cells, cell plates, and battery racks provides an indication of physical damage or abnormal deterioration that could potentially degrade battery performance. Since the DG battery cell jars are not transparent, a direct visual inspection of the cell plates cannot be performed. Instead, the cell plates are inspected for physical damage and abnormal deterioration by: 1) visually inspecting the jar sides of each cell for excessive bowing andfor deformation, and 2) visually inspecting the electrolyte of each cell for abnormal appearance.

Operating experience has shown that these components usually pass the SR when performed at the 18 month Frequency. Therefore, the Frequency was concluded to be acceptable from a reliability standpoint.

SR 3.8.4. and SR 3.8.4.

Visual inspection and resistance measurements of intercell, interrack, intertier, and terminal connections provide an indication of physical damage or abnormal deterioration that could indicate degraded battery condition. The anticorrosion material, as recommended by the manufacturer for the DG batteries, is used to help ensure good electrical Catawba Units 1 and 2 B 3.8.446 Revision NoA-L-

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE REQUIREMENTS (continued) connections and to reduce termina! deterioration. The visual inspection for corrosion is not intended to require removal of and inspection under each terminal connection. The removal of visible corrosion is a preventive maintenance SR. The presence of visible corrosion does not necessarily represent a failure of this SR provided visible corrosion is removed during performance of SR 3.8A.

For the DG batteries, the cell-to-cell terminal pole screws should be set from 14 to 15 foot-pounds of torque. Operating experience has shown that these components usually pass the SR when performed at the 18 month Frequency. Therefore, the Frequency was concluded to be acceptable from a reliability standpoint.

,(I SR 3.8.4.

This SR requires that each battery charger for the DC channel be capable of supplying at least 200 amps and at least 75 amps for the DG chargers. All chargers shall be tested at a voltage of at least 125 V for 2 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months . These requirements are based on the design capacity of the chargers (Ref. 4). According to Regulatory Guide 1.32 (Ref. 10), the battery charger supply is required to be based on the largest combined demands of the various steady state loads and the charging capacity to restore the battery from the design minimum charge state to the fully charged state, irrespective of the status of the unit during these demand occurrences. The minimum required amperes and duration ensures that these requirements can be satisfied.

The Surveillance Frequency is acceptable, given the unit conditions required to perform the test and the other administrative controls existing to ensure adequate charger performance during these 18 month intervals. In addition, this Frequency is intended to be consistent with expected fuel cycle lengths.

SR 3.8.4.kCZJ A battery service test is a special test of battery capability, as found, to satisfy the design requirements (battery duty cycle) of the DC electrical power system. The discharge rate and test length should correspond to the design duty cycle requirements as specified in Reference 4. The DC channel batteries are tested to supply a current > 522.14 amps for the first minute, then > 267.71 amps for the next 9 minutes, > 376.15 amps for the next 10 minutes, and > 281.94 amps for the next 100 minutes.

Terminal voltage is required to remain > 110.4 volts during this test. The Catawba Units 1 and 2 B 3.8.4-7 Revision No.-

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE REQUIREMENTS (continued)

DG batteries are tested to supply a current 2 218.5 amps for the first minute, then 2 42.5 amps for the'next 10 minutes, then > 121.8 amps for the next minute, then > 42.5 amps for the remaining 108 minutes.

Terminal voltage is required to reryan > 105 volts during this test.

Except for performing SR 3.8.4. for the DC channel batteries with the unit on line, the Surveillance Frequency of 18 months is consistent with the recommendations of Regulatory Guide 1.32 (Ref. 10), which states that the battery service test should be performed during refueling operations or at some other outage, with intervals between tests, not to exceed 18 months.

This SR is modified by two Notes. Note 1 allows the performance of a modified performance discharge test in lieu of a service test The modified performance discharge test is a performance discharge test that is augmented to include the high-rate, short duration discharge loads (during the first minute and 11-to-1 2 minute discharge periods) of the service test. The duty cycle of the modified performance test must fully envelope the duty cycle of the service test if the modified performance discharge test is to be used in lieu of the service test. Since the ampere-hours removed by the high-rate, short duration discharge periods of the service test represents a very small portion of the battery capacity, the test rate can be changed to that for the modified performance discharge test without compromising the results of the performance discharge test.

The battery terminal voltage for the modified performance discharge test should remain above the minimum battery terminal voltage specified in the battery service test for the duration of time equal to that of the service test.

A modified discharge test is a test of the battery capacity and its ability to provide a high rate, short duration load (usually the highest rates of the duty cycle). This will often confirm the battery's ability to meet the critical periods of the load duty cycle, in addition to determining its percentage of rated capacity. Initial conditions for the modified performance discharge test should be identical to those specified for a service test. The reason for Note 2 is that performing the Surveillance would perturb the electrical distribution system and challenge safety systems.

SR 3.8.4.

A battery performance discharge test 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 Catawba Units 1 and 2 B 3.8.4-8 Revision No. e-

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE REQUIREMENTS (continued) by the acceptance test. The test is intended to determine overall battery degradation due to age and usage.

A battery modi erformance discharge test is described in the Bases for SR 3.8.4.'. Either the battery performance discharge test or the modified performance discharge'test is acceptable for satisfying SR 3.8A ; however, only t emodified performance discharge test may be 3 used to satisfy SR 3.8.4.% while satisfying the requirements of SR 3.8.4, at the same time.

The acceptance criteria for this Surveillance are consistent with IEEE-450 (Ref. 9). This reference recommends that the battery be replaced if its capacity is below 80% of the manufacturer's rating. A capacity of 80%

shows that the battery rate of deterioration is increasing, even if there is ample capacity to meet the load requirements.

The Surveillance Frequency for this test is normally 60 months. If the battery shows degradation, or if the battery has reached 85% of its expected life and capacity is < 100% of the manufacturer's rating, the Surveillance Frequency is reduced to 18 months. However (for DC vital batteries only), if the battery shows no degradation but has reached 85%

of its expected life, the Surveillance Frequency is only reduced to 24 months for batteries that retain capacity > 100% of the manufacturers rating. Degradation is indicated, according to IEEE-450 (Ref. 9), when the battery capacity drops by more than 10% relative to its average capacity on the previous performance tests or when it is > 10% below the manufacturer's rating. These Frequencies are consistent with the recommendations in IEEE-450 (Ref. 9). This SR is modified by a Note which is applicable to the DG batteries only. The reason for the Note is that performing the Surveillance would perturb the associated electrical distribution system and challenge safety systems.

REFERENCES 1. 10 CFR 50, Appendix A, GDC 17.

2. Regulatory Guide 1.6, March 10, 1971.

3. IEEE-308-1971 and 1974.

4. UFSAR, Chapter 8.

5. IEEE-485-1983, June 1983.

6. UFSAR, Chapter 6.

Catawba Units 1 and 2 B 3.8.4-9 Revision No.-4--

DC Sources-Operating B 3.8.4 BASES

REFERENCES (continued)

7. UFSAR, Chapter 15>

8. 10 CFR 50.36, Technical Specifications, (c)(2)(9).

9. IEEE-450-1975 and/or 1980.

10. Regulatory Guide 1.32, February 1977.

Catawba Units 1 and 2 3.8.4-1 0 ED Revision No.--or-

DC Sources - Shutdown 3.8.5 3.8 ELECTRICAL POWER SYSTEMS 3.8.5 DC Sources-Shutdown LCO 3.8.5 The following shall be OPERABLE:

a. Two channels of DC electrical power subsystems and a train of DG DC electrical power subsystem capable of supplying one train of the DC electrical power distribution subsystem(s) required by LCO 3.8.10, Distribution Systems-Shutdown," and

b. One source of DC electrical power, other than that required by LCO 3.8.5.a, capable of supplying the remaining train of the DC electrical power distribution subsystem(s) when required by LCO 3.8.10.

APPLICABILITY: MODES 5 and 6, During movement of irradiated fuel assemblies.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One or more required A.1.1 Declare affected required Immediately channel(s) of DC feature(s) inoperable.

electrical power subsystems or required OR DG DC electrical power subsystem inoperable. A.2.1 Suspend CORE Immediately ALTERATIONS.

AND A.2.2 Suspend movement of Immediately irradiated fuel assemblies.

AND (continued)

Catawba Units 1 and 2 3.8.5-1 Amendment Nos. 173/165

DC Sources - Shutdown 3.8.5 ACTIONS CONDITION PEQUIRED ACTION COMPLE1ION TIME A. (continued) A2.3 Initiate action to suspend Immediately operations involving positive reactivity additions.

AND A24 Initiate action to restore- Immediately required DC electrical power subsystems to OPERABLE status.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.5.1 -NOTE The following SRs are not required to be performed:

SR 3.8.4.1, SR 3.8.4.$f, andSR 3.8.4.9)

For DC sources required to be OPERABLE, the following In accordance with SRs are applicable: : applicable SRs SR 3.8.4.1 SR 3.8.4.4 SR 3.8.4.7 SR 3.8.4 2 SR 3.8.4.5 SR 3.8.4.8 SR 3.8.4.3 SR 3.8.4.6 Catawvba Units 1 and 2 :3.8-5-2 Amendment Nosos45-

DC Sources-Shutdown B 3.8.5 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.5 DC Sources-Shutdown BASES BACKGROUND A description of the DC sources is provided in the Bases for LCO 3.8.4, "DC Sources-Operating.0 APPLICABLE The initial conditions of Design Basis Accident and transient analyses SAFETY ANALYSES in the UFSAR, Chapter 6 (Ref. 1) and Chapter 15 (Ref. 2), assume that Engineered Safety Feature systems are OPERABLE. The DC electrical power system provides normal and emergency DC electrical power for the diesel generators, emergency auxiliaries, and control and switching during all MODES of operation.

The OPERABILITY of the DC subsystems is consistent with the initial assumptions of the accident analyses and the requirements for the supported systems' OPERABILITY.

The OPERABILITY of the minimum DC electrical power sources during MODES 5 and 6 and during movement of irradiated fuel assemblies ensures that:

a. The unit can be maintained in the shutdown or refueling condition for extended periods;

b. Sufficient instrumentation and control capability is available for monitoring and maintaining the unit status; and

c. Adequate DC electrical power is provided to mitigate events postulated during shutdown, such as a fuel handling accident.

The DC sources satisfy Criterion 3 of 10 CFR 50.36 (Ref. 3).

LCO The DC electrical power subsystems, with 1) at least one subsystem consisting of two batteries, one battery charger per battery; and 2) when the redundant train of DC electrical power distribution subsystem is required by LCO 3.8.10, the other subsystem consisting of either a battery or a charger, and 3) the corresponding control equipment Catawba Units 1 and 2 8 3.8.5-1 Revision No. 0

DC Sources-Shutdown B 3.8.5 BASES LCO (continued) and interconnecting cabling within the train, are required to be OPERABLE to support required trains of the distribution systems required OPERABLE by LCO 3.8.10, 6Distribution Systems-Shutdown.' This ensures the availability of sufficient DC electrical power sources to operate the unit in a safe manner and to mitigate the consequences of postulated events during shutdown (e.g., fuel handling accidents).

APPLICABILITY The DC electrical power sources required to be OPERABLE in MODES 5 and 6, and during movement of irradiated fuel assemblies, provide assurance thatI

a. Required features to provide adequate coolant inventory makeup are available for the irradiated fuel assemblies in the core;

b. Required features needed to mitigate a fuel handling accident are available;

c. Required features necessary to mitigate the effects of events that can lead to core damage during shutdown are available; and

d. Instrumentation and control capability is available for monitoring and maintaining the unit in a cold shutdown condition or refueling condition.

The DC electrical power requirements for MODES 1, 2, 3, and 4 are covered in LCO 3.8.4.

ACTIONS A.1.1, A.2.1, A.2.2, A2.3, and A.2.4 If two trains are required by LCO 3.8.10, the remaining train with DC power available may be capable of supporting sufficient systems to allow continuation of CORE ALTERATIONS and fuel movement. By allowing the option to declare required features inoperable with the associated DC power source(s) inoperable, appropriate restrictions will be implemented in accordance with the affected required features LCO ACTIONS. In many instances, this option may involve undesired administrative efforts.

Therefore, the allowance for sufficiently conservative actions is made (i.e., to suspend CORE ALTERATIONS, movement of irradiated fuel assemblies, and operations involving positive reactivity additions) that could result in loss of required SDM (MODE 5) or required boron concentration (MODE 6). Suspending positive reactivity additions that could result in failure to meet the minimum SOM or boron concentration Catawba Units 1 and 2 B 3.8.5-2 Revision No. 2

DC Sources-Shutdown B 3.8.5 BASES ACTIONS (continued) limits is required to assure continued safe operation. Introduction of coolant inventory rm':st be from sources that have a boron concentration greater than that what would be required in the RCS for minimum SDM or refueling boron concentration. This may result in an overall reduction in RCS boron concentration, but provides acceptable margin to maintaining subcritical operation. Introduction of temperature changes including temperature increases when operating with a positive MTC must also be

evaluated to ensure they do not result in a loss of required SDM.

Suspension of these activities shall not preclude completion of actions to establish a safe conservative condition. These actions minimize probability of the occurrence of postulated events. It is further required to immediately initiate action to restore the required DC electrical power subsystems and to continue this action until restoration is accomplished in order to provide the necessary DC electrical power to the unit safety systems.

The Completion Time of immediately is consistent with the required times for actions requiring prompt attention. The restoration of the required DC electrical power subsystems should be completed as quickly as possible in order to minimize the time during which the unit safety systems may be without sufficient power.

SURVEILLANCE SR 3.8.5.1 6 REQUIREMENTS SR 3.8.5.1 requires performa e of all Surveillances required by SR 3.8.4.1 through SR 3.8.4. . Therefore, see the corresponding Bases for LCO 3.8.4 for a discussion of each SR.

This SR is modified by a Note. The reason for the Note is to preclude requiring the OPERABLE DC sources from being discharged below their capability to provide the required power supply or otherwise rendered inoperable during the performance of SRs. It is the intent that these SRs must still be capable of being met, but actual performance is not required.

REFERENCES 1. UFSAR, Chapter 6.

2. UFSAR, Chapter 15.

3. 10 CFR 50.36, Technical Specifications, (c)(2)(ii).

Catawba Units 1 and 2 B 3.8.5-3 Revision No. -+

Battery Cell Parameters

3.8.6 3.8 ELECTRICAL POWER SYSTEMS 3.8.6 Battery Cell Parameters"s DEL ETE -XSueR7j-LCO 3.8.6 ' Battery ce ammeters fre limitsfTable 3.8.6- nd the Dies channels C batteries ,all be within td' enerator (DG rain A and Tr b ettbries shall bithin the limof temperature d level.

B APPLICABILITY: When associated DC electrical power subsystems are required to be OPERABLE ACTIONS SepartCntoerialw oc--------NOTEr Separate Condition entry is allowed for each battery.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more channel(s) A.1 Verify pilot cells electrolyte 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months of DC batteries with one level and float voltage or more battery cell meet Table 3.8.6-1 parameters not within Category C limits.

Category A or B limits.

AND A.2 Verify battery cell. 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months parameters meet Table 3.8.6-1 Category C AND limits.

Once per 7 days thereafter AND A.3 Restore battery cell 31 days parameters to Category A and B limits of Table 3.8.6-1.

(continued)

Catawba Units 1 and 2 3.8.6-1 Amendment Nos. 17-3.14i-

Battery Cell Parameters f 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETlON TIME B. Required Action and 8.1 Declare associated battery Immediately associated Completion inoperable.

Time of Condition A not met-OR One or more channel(s) of DC batteries with average electrolyte temperature of the representative cells

< 60'F.

OR One or more channel(s) of DC batteries with one or more battery cell parameters not within Category C values.

C. One or more DG C.1 Enter applicable Immediately batteries with electrolyte Condition(s) and Required level not at or above the Action(s) of LCO 3.8.1, low mark and not at or 'AC Sources - Operating',

below the high mark. or LCO 3.8.2, 'AC Sources

- Shutdown' for thie OR associated DG made inoperable.

One or more DG batteries with average electrolyte temperature of the representative cells < 600F.

CNSE~T X.~ "__

Catawba Units 1 and 2 3.8.6-2 Amendment Nos. 4Z3 4-:

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Battery Cell Parameters 3.8.6 SURVEILLANCE REQUIREMENTS SURk'PILLANCE FREQUENCY SR 3.8.6.1 Verify battery cell parameters of the channels of DC 7 days batteries meet Table 3.8.6-1 Category A limits.

SR 3.8.62 Venrfy electroye level of DG batteries is at or above low 7 days

markand at or below high mark.

SR 3.8.6.3 _Verify battery cell parameters of the channels of DCG 92 days batteries meet Table 3.8.6-1 Category B limits.

AND Once within 7 days after a battery discharge

<110V AND Once within 7 days after a battery overcharge

> 150 V SR 3.8.6.4 Verify average electrolyte temperature for the channels 92 days of DC and DG batteries of representative cells is > 600 F.

I N 56 RT. 5 Catawba Units 1 and 2 3.8.6-3 Amendment Nos.

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Battely Cell Parameters 3.8.6 Table 3.8.6-1 (page 1 of 1)

Battery Cell Parameters Requirements CATEGORYkA u CATEGORY C.

UMITS FOR EACH CATEGORY B: ALLOWABLE DESIGNATED UMITS FOR EACH UMITS FOR EACH PARAMETER PILOT CELL CONNECTED CELL CONNECTED CELL Electrilytetevel > Minimum level > Minimum level 'Above top bf plates; indication mark, and indication mark, and . and not overflowing

< Y4 inch above . < %4inch above maximum level maximum level indication maek, indication rrark~l Float Voltage > 2.13 V > 2.13 V > 2.07 V Specific GravityeX > 1.200 > 1.195 Not more than 0.020 below average of all AND connected cells or

> 1.195 Average of all connected cells AND

> 1.205 Average of all connected cells

. > 1.195 (a) It is acceptable for the electrolyte level to temporarily increase above the specified maximum during equalizing charges provided it is not overflowing.

(b) Corrected for electrolyte temperature and level. Level correction is not required, however, when battery charging is < 2 amps when on float charge.

(c) A battery charging current of < 2 amps when on float charge is acceptable for meeting specific gravity limits following a battery recharge, for a maximum of 7 days. When charging current is used to satisfy specific gravity requirements, specific gravity of each connected cell shall be measured prior to expiration of the 7 day allowance.

Catawba Units 1 and 2 3.8.6-4 Amendment Nos. 1731165 1

Battery Cell Parameters B 3.8.6 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.6 Battery Cell Parameters, BASES 'Y- TZ r d BACKGROUND This LC9A lineates the imt n electrolyte temrn ture, level, float vol and specific gra for the channels power source batt s.

31f 100 also addre es the trains of D0 r the Diesel Gener s limits on temperature level. A discus nof these batteries d their OPERABI L requirements is ovided in the Bases 100 3.8.4, -DC Source perating.' and 3.8.5, "DC Sour utdown.

APPLICABLE The initial conditions of Design Basis Accident (DBA) and transient SAFETY ANALYSES analyses in the UFSAR, Chapter 6 (Ref. 1) and Chapter 15 (Ref. 2),

assume Engineered Safety Feature systems are OPERABLE. The DC electrical power system provides normal and emergency DC electrical power for the diesel generators, emergency auxiliaries, and control and switching during all MODES of operation.

The OPERABILITY of the DC subsystems is consistent with the initial assumptions of the accident analyses and is based upon meeting the design basis of the unit. This includes maintaining at least one train of DC sources OPERABLE during accident conditions, in the event of:

a. An assumed loss of all offsite AC power or all onsite AC power; and

b. A worst case single failure.

Battery cell parameters satisfy Criterion 3 of 10 CFR 50.36 (Ref. 3).

LCO Battery cell parameters must remain within acceptable limits to ensure availability of the required DC power to shut down the reactor and maintain it in a safe condition after an anticipated operational occurrence or a postulated DBA. Electrolyte limits are conservatively established, allowing continued DC electrical system function even with Category A and B limits not met.

Catawba Units 1 and 2 B 3.8.6-1 Revis'-on No.-e-

BatteryCell Parameters B 3.8.6 BASES APPUCABILITY The battery cell parameters are required solely for the support of the

\ associated DC electzical power subsystems. Therefore, battery electrol1e is only required when the DC power source is required to be OPERABLE Refer to the Applicability discussion in Bases for LCO 3.8.4 N and LCO 3.8.5.

ACTIONS A.1. A2. and A.3

-' With one or rwrdcells in one or more batteries notvWlfin imits (Le.;: --

CategoiyA limits not met, Category B limits not met, orCategotyA and B limits not met) but within the Category C limits specified fi Table 3.8.6-1 in the accompanying LCO, the battery is degraded but there is still sufficient capacity to perform the intended function. Therefore, the affected battery is not required to be considered inoperable solely as a result of Category A or B limits not met and operation is permitted for a limited period.

The pilot cell electrolyte level and float voltage are required to be verified to meet the Category C limits within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months (Required Action A.1). This check will provide a quick indication of the status of the remainder of the battery cells. One hour provides time to inspect the electrolyte level and to confirm the float voltage of the pilot cells. One hour is considered a reasonable amount of time to perform the required verification.

Verification that the Category C limits are met (Required Action A.2) provides assurance that during the time needed to restore the parameters to the Category A and B limits, the battery is still capable of performing its intended function. A period of 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is allowed to complete the initial verification because specific gravity measurements must be obtained for each connected cell. Taking into consideration both the time required to perform the requited verification and the assurance that the battery cell parameters are not severely degraded, this time is considered reasonable. The verification is repeated at 7 day intervals until the parameters are restored to Category A or B limits. This periodic verification is consistent with the normal Frequency of pilot cell Surveillances.

Continued operation is only permitted for 31 days before battery cell parameters must be restored to within Category A and B limits. With the consideration that, while battery capacity is degraded, sufficient capacity exists to perform the intended function and to allow time to fully restore the battery cell parameters to normal limits, this time is acceptable prior to declaring the battery inoperable.

Catawba Units I and 2 B 3.8.6-2 Revision No. 0 , -

Battey Cell Parameters B 3.8.6 BASES ACTIONS (continued)

N B.1 N With one or more batteries with one or more battery ceU parameters outside the Category C limit for any connected cell, sufficient capacity to supply the maximum expected load requirement is not assured and the corresponding DC electical power subsystem must be dedared inoperable. Additionally, other potentially extreme conditions, such as not completing the Required Actions of.Codion:Aihinthe4Cequired. - -

Completion Time or average electrolyte temperature of representative cells falling below 600 F, are also cause for immediately declaning the associated DC electrical power subsystem inoperable.

CA' With one more DG batt *es with one or moroattery cell(s) not withi the limit of level or temn rature, sufficient cadcity to supply the requir load for the is not assumed a the corresponding 0 elec cal power sub stem must be d ed inoperable immed ely.

Dr-LE TC ropriate LCO must then be ent for the DG support by the S -- 1 operable DC system If the plt is in MODES 1 thro Ih4, LCO 5/JSEPRT /3.81, -AC So cesperating'j required to be entere If the DG required to supp equipment during DES 5 or 6 or movem t of irradiated fu assemblies, regard! s of operating mode, LCOz8.2, 'AC Source Sihutdown,' is the aropriate LCO.

SURVEILLANCE SR 3.8.6.1 REQUIREMENTS This SR verifies that Category A battery cell parameters are consistent with IEEE-450 (Ref. 4), which recommends regular battery inspections (at least one per month) including voltage, specific gravity, and electrolyte temperature of pilot cells.

SR 3.8.62 This SR verifies the DG battery cell parameter of level via regular battery inspection (at least once every 7 days). The electrolyte level is monitored in order to maintain battery performance and effectiveness. The 7 day Frequency has been shown acceptable through operating experience.

Catawba Units I and 2 63.3.6-3 Revision No.-G-

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Battery Cell Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS (continued)

SR -8.6.3 The quarterly inspection of the channels of DC batteries for specific gravity and voltage is consistent with IEEE-450 (Ref. 4). In addition, within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of a battery discharge < 110 V or a battery overcharge

> 150 V, the battery must be demonstrated to meet Category B limits.

Transients, such as motor starting transients, which may momentarily

--- : - cause battery voltage -to drop to *-1 10 V, do not consfitute a-battety. - .: ..

discharge provided the battery terminal vbltage and float current return to pre-transient values. This inspection is also consistent with IEEE-450 (Ref. 4), which recommends special inspections folloWing a severe discharge or overcharge, to ensure that no significant degradation of the battery occurs as a consequence of such discharge or overcharge.

SR 3.8.6.4 This Surveillance verification that the average temperature of representative cells is > 600 F, is consistent with a recommendation of IEEE-450 (Ref. 4), that states that the temperature of electrolytes in representative cells should be determined on a quarterly basis.

Lower than normal temperatures act to inhibit or reduce battery capacity.

This SR ensures that the operating temperatures remain within an acceptable operating range. This limit is based on manufacturer recommendations.

The term representative cells replaces the fixed number of 'six connected cells, consistent with the recommendations of IEEE-450 (Ref.

4) to provide a general guidance to the number of cells adequate to monitor the temperature of the battery cells as an indicator of satisfactory performance. For some cases, the number of cells may be less than six, in other conditions, the number may be more.

1j45 R 6 Table 3.8.6-1 This table delineates the limits on electrolyte level, float voltage, and specific gravity for three different categories. The meaning of each category is discussed below.

Catawba Units 1 and 2 B 3.8.6-4 Revision No.v

Battery Cell Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS (continued)

Category A defines the normal parameter limit for each designated pilot cell in each battery. The cells selected as pilot cells are tiose whosu-temperature, voltage, and electrolyte specific gravity approximate the state of charge of the entire battery.

The Category A limits specified for electrolyte level are based on manufacturer recommendations and are consistent with the guidance in

- -IEEE-450 (Ref. 4), with the extra %inch allowancembovelhe Higtrwater level indication for operating margin to account for temperatures and charge effects. In addition tothis allowance, footnoteatoTable 3.8.6-1 permits the electrolyte level to be above the specified'maximum level during equalizing charge, provided it is not overflowing. These limits ensure that the plates suffer no physical damage, and that adequate electron transfer capability is rnaintained in the event of transient conditions. IEEE-450 (Ref. 4) recommends that electrolyte level readings should be made only after the battery has been at float charge for at least 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

The Category A limit specified for float voltage is 2 2.13 V per cell. This value is based on the recommendations of IEEE-450 (Ref. 4). which states that prolonged operation of cells < 2.13 V can reduce the life expectancy of cells. The Category A limit specified for specific gravity for each pilot cell is > 1.200 (0.015 belowthe manufacturerfully charged nominal specific gravity or a battery charging current that had stabilized at a low value). This value is characteristic of a charged cell with adequate capacity. According to IEEE-450 (Ref. 4), the specific gravity readings are based on a temperature of 77TF (250C).

The specific gravity readings are corrected for actual electrolyte temperature and level. For each 30 F (1.670C) above 77F (250C), 1 point (0.001) is added to the reading; 1 point is subtracted for each 30 F below 77 0F. The specific gravity of the electrolyte in a cell increases withl a loss of water due to electrolysis or evaporation.

Category B defines the normal parameter limits for each connected cell.

The term connected cell' excludes any battery cell that may be jumpered out.

The Category B limits specified for electrolyte level and float voltage are the same as those specified for Category A and have been discussed above. The Category B limit specified for specific gravity for each connected cell is > 1.195 (0.020 below the manufacturer fully ciarged, nominal specific gravity) with tihe average of all connected cells > 1205 Catawba Units 1 and 2 B 3.8.6-5 Revision No. 0

Battery Cell Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS (continued)

(0.010 below the manufacturer fully charged, nominal specific gravity).

These values are based on manufacturers recommendations. The minimum specific gravity value required for each cell ensures that the effects of a highly charged or newly installed cell will not mask overall degradation of the battery.

Category C defines the limits for each connected celL These values, although reduoed providerassuranetthafuffident apacity2existst~- :

perform the intended function and maintain a margin of safety. When any battery parameter is outside the Category C rimits, the assurance of sufficient capacity described above no longer exists, and tFe battery must be declared inoperable.

The Category C limits specified for electrolyte level (above the top of the plates and not overflowing) ensure that the plates suffer no physical damage and maintain adequate electron transfer capability. The Category C limits for float voltage are based on IEEE-450 (Ref. 4), which states that a cell voltage of 2.07 V or below, under float conditions and not caused by elevated temperature of the cell, indicates internal cell problems and may require cell replacement The Category C limit of average specific gravity 21.195 is based on manufacturer recommendations (0.020 below the manufacturer recommended fully charged, nominal specific gravity). In addition to that limit, it is required that the specific gravity for each connected cell must be no less than 0.020 below the average of all connected cells. This limit ensures that the effect of a highly charged or new cell does not mask overall degradation of the battery.

The footnotes to Table 3.8.6-1 are applicable to Category A, B. and C specific gravity. Footnote (b) to Table 3.8.6-1 requiresthe above mentioned correction for electrolyte level and temperature, with the exception that level correction is not required when battery charging current is < 2 amps on float charge. This current provides, in general, an indication of overall battery condition.

Because of specific gravity gradients that are produced during the recharging process, delays of several days may occur while waiting for the specific gravity to stabilize. A stabilized charger current is an acceptable alternative to specific gravity measurement for determining the state of charge. This phenomenon is discussed in IEEE-450 (Ref. 4).

Footnote (c) to Table 3.8.6-1 allows the float charge current to be used as an alternate to specific gravity for up to 7 days following a battery Catawba Units 1 and 2 B 3.8.646 Revision No 0 X

Battery Cell Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS (continued) raicharge. Within 7 days, each connected celIls specific gravity must be measured to confirm the state of charge. Folloving a minor battery recharge (such as equaring charge that does not follow a deep discharge) specific gravity gradients are not significant, and confirming measurements may be made in less than 7 days.

The value of 2 amps used in footnote (b) and (c) is the nominal value for float current established by-the battery-vendor as representing a fully.

charged battery with an allowance for ov&rall battery condition.

REFERENCES 1. UFSAR, Chapter 6.

2. UFSAR, Chapter 15.

3. 10 CFR 50.36, Technical Specifications, (c)(2)(ii).

4. IEEE-450-1980.

Catawba Units 1 and 2 6 3.8.6-7 Reanision No. 0

ATTACHMENT 2 DESCRIPTION OF PROPOSED CHANGES AND TECHNICAL JUSTIFICATION

DESCRIPTION OF PROPOSED CHANGES AND TECHNICAL JUSTIFICATION Background Information:

In 1998 (U2) and 1999(U1) the Emergency Diesel Generator batteries were replaced with Ni-Cd cells. Also, this modification installed battery cells with a higher Ampere-Hour capacity, 237Ah to 277Ah, and upsized the battery to 94 cells from the former 92 cell battery to add additional margin. Under the current Technical Specification requirements, an Emergency DG found to have a DG battery with a cell below 1.36 V shall be immediately declared inoperable. This places the affected unit into a 72-hour shutdown action. The subsequent corrective actions to restore operability typically involve jumpering out or replacing the low-voltage cell. Either action takes approximately 4-6 hours, during which time the affected Emergency DG is unavailable. This change will more accurately reflect the actual impact of a single battery cell failure on the actual diesel generator operability.

This revision will also minimize unnecessary entries into a Technical Specification Action Statement and battery unavailability due to an overly conservative TS requirement.

Description of Proposed Changes:

Duke Energy Corporation is proposing to revise Technical Specification Sections 3.8.4, "DC Sources - Operating";

3.8.5, "DC Sources - Shutdown"; and 3.8.6, "Battery Cell Parameters", to allow a Diesel Generator battery to remain operable with no more than one cell < 1.36 Vdc on float charge. The specific revisions are as follows:

l.Delete SR 3.8.4.2 and associated bases from section 3.8.4. SR 3.8.4.2 currently reads as follows:

SR 3.8.4.2: Verify DG battery cell voltage > 1.36 V on float charge.

Renumber existing SR 3.8.4.3 through SR 3.8.4.9 and the associated bases.

This change is simply relocating this surveillance from TS 3.8.4, "DC Sources-Operating" to a more appropriate Technical Specification. TS 3.8.6, "Battery Cell Parameters" is the new location for the surveillance.

Note item #6 in this section, which adds the new SR 3.8.6.5. The wording in the Bases section for SR ATTACHMENT 2 Page 1 of 8

3.8.6.5 will be revised for clarity, also: Under the Bases section the current wording:

"For this surveillance, two different cells shall be tested each month."

will be revised for clarity as follows to state:

"For this surveillance, a minimum of two cells shall be tested every 7 days. The cells selected for testing shall be rotated on a monthly basis."

2.Revise SR 3.8.5.1 to reflect the deletion of SR 3.8.4.2 as follows:

I SURVEILLANCE ]FREQUENCY SR 3.8.5.1 --------------------------

NOTE-------------_______________

The following SRs are not required to be performed:

SR 3.8.4.6, SR 3.8.4.7, and SR In 3.8.4.8. accordance with applicable SRs For DC sources required to be OPERABLE, the following SRs are applicable:

SR 3.8.4.1 SR 3.8.4.4 SR 3.8.4.7 SR 3.8.4.2 SR 3.8.4.5 SR 3.8.4.8 SR 3.8.4.3 SR 3.8.4.6 ATTACHMENT 2 Page 2 of 8

3. Revise the text for SR 3.8.5.1 in Bases Section B 3.8.5 as follows:

SR 3.8.5.1 SR 3.8.5.1 requires performance of all Surveillances required by SR 3.8.4.1 through SR 3.8.4.8. Therefore, see the corresponding Bases for LCO 3.8.4 for a discussion of each SR.

This SR is modified by a Note. The reason for the Note is to preclude requiring the OPERABLE DC sources from being discharged below their capability to provide the required power supply or otherwise rendered inoperable during the performance of SRs. It is the intent that these SRs must still be capable of being met, but actual performance is not required.

4. Revise the text in Technical Specification 3.8.6 as follows:

LCO Battery cell parameters for the channels of DC batteries shall be within the limits of Table 3.8.6-1 and the Diesel Generator (DG)

Train A and Train B batteries shall be within the limits of temperature, level, and voltage.

5. Revise the text in the Background section of B 3.8.6 as follows:

BACKGROUND This LCO delineates the limits on electrolyte temperature, level, float voltage, and-specific gravity for the channels DC power source batteries. The LCO also addresses the trains of DC for the Diesel Generators limits on temperature, level, and float voltage.

A discussion of these batteries and their OPERABILITY requirements is provided in the Bases for LCO 3.8.4, "DC Sources-Operating," and LCO 3.8.5, "DC Sources-Shutdown."

ATTACHMENT 2 Page 3 of 8

6.Add a new surveillance requirement, SR. 3.8.6.5, to section 3.8.6 that reads as follows:

SURVEILLANCE FREQUENCY SR 3.8.6.5 Verify DG battery cell 7 days voltage Z 1.36 V on float charge.

7.Add the following text for SR 3.8.6.5 to TS Bases 3.8.6:

SR 3.8.6.5 Verifying battery individual cell voltage while on float charge for the DG batteries ensures each cell is capable of supporting its intended function. Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery (or battery cell) and maintain the battery (or a battery cell) in a fully charged state. The battery cell voltage limit of 2:

1.36 V is consistent with the nominal design voltage of the battery and is based on the manufacturer's recommended minimum float charge voltage for a fully charged cell with adequate capacity. The battery is designed and sized with a capacity margin sufficient to allow up to one cell to be fully degraded with a voltage < 1.36 V assuming that no cells are jumpered out. The battery sizing calculations account for a degraded cell by assuming the degraded cell undergoes a worst-case polarity reversal during a design discharge.

For this surveillance, a minimum of two cells shall be tested every seven days. The cells selected for testing shall be rotated on a monthly basis. The 7-day Frequency is consistent with the manufacturer's recommendations.

ATTACHMENT 2 Page 4 of 8

8. Revise the text for Action C.1 in TS Bases 3.8.6 as follows:

With one or more DG batteries with one or more battery cell(s) not within limits of level or temperature, sufficient capacity to supply the required load for the DG is not assumed, and the corresponding DC electrical power subsystem must be declared inoperable immediately. With one or more DG batteries with two or more battery cells not within limits of voltage, sufficient capacity to supply the required load for the DG is not assumed, and the corresponding DC electrical power subsystem must be declared inoperable immediately. Appropriate LCO(s) must then be entered for the DG supported by the inoperable DC subsystem.

If the plant is in MODES 1 through 4, LCO 3.8.1, "AC Sources - Operating" is required to be entered.

If the DG is required to support equipment during MODES 5 or 6 or movement of irradiated fuel assemblies, regardless of operating mode, LCO 3.8.2, "AC Sources -

Shutdown" is the appropriate LCO.

ATTACHMENT 2 Page 5 of 8

9. Revise Condition C in Technical Specification 3.8.6 by adding a new condition as shown in italics below:

CONDITION REQUIRED ACTION COMPLETION IlII TIME C. One or more DG C.1 Enter Immediately batteries with applicable electrolyte level Condition(s) not at or above and Required the low mark and Action(s) of not at or below LCO 3.8.1, the high mark. "AC Sources -

Operating",

OR or LCO 3.8.2, "AC Sources -

One or more DG Shutdown" for batteries with the average associated DG electrolyte made temperature of inoperable.

the representative cells < 602F.

OR One or more DG batteries with two or more connected cells

< 1.36V.

ATTACHMENT 2 Page 6 of 8-

Regulatory Requirements and General Discussion Technical Justification:

The DG (Emergency Diesel Generator) batteries each consist of 94 SAFT SBM277 pocket-plate Ni-Cd cells. As described on (the manufacturer's technical justification),

pocket plate Ni-Cd battery cells exhibit an occasional phenomenon in float service where a particle of active material lodges between the plates and causes a high-resistance internal short. In some cases, the resistance of the short may be low enough to cause the cell to slowly discharge. Over time, this condition normally reverses itself, and the cell recovers without any degradation; however, in the short term the discharging cell will typically have a float voltage less than 1.36V. As described in Attachment 5, if a battery containing a low-voltage, low-capacity cell is deeply discharged due to a high-resistance internal short, there is a possibility that the affected cell may undergo polarity reversal when subjected to a design discharge. In effect, the discharge current from the remaining cells acts to reverse charge the low-voltage, low-capacity cell. Ni-Cd cells are designed with excess negative capacity such that the positive will be depleted and reverse before the negative under discharge conditions. When the positive depletes and reverses under a discharge condition, the cell voltage will typically be

-0.3V. The amount of excess negative capacity (versus the positive) is such that the cell reverse voltage will remain at approximately -0.3V for an extended period of time. If a cell is at a very low state of charge at the beginning of discharge and the discharge duration is long enough, the negative will eventually be depleted and go into reversal as well. The magnitude of reversal is dependent on the discharge current and ampere-hour capacity of the cell. For an SBM277 cell discharging at 110 amps (which is 40% of its capacity rating), the maximum cell reverse voltage would be

-1.80V. The magnitude of the reverse voltage would be somewhat less for lower discharge currents.

As described in Attachment 5, the worst-case scenario would be one in which a low-voltage, low-capacity cell is discharged by a high-resistance internal short to the point where the positive plate is fully depleted. Once the positive plate is fully depleted, the electrochemical reaction stops and prevents further depletion of the negative plate. Under these conditions, a cell subjected to a design discharge would go into immediate reversal of approximately -0.3V, but it would take several minutes for the cell to go into a full reversal of -1.80V (assuming a ATTACHMENT 2 Page 7 of 8

maximum load current of 110 amps). Though the LOCA-BO duty cycle - the worst-case design discharge profile - includes some discharge currents higher than 110 amps, these occur during the first minute when a full cell reversal cannot occur. The discharge currents during the remainder of the LOCA-BO duty cycle, when full cell reversal can occur, are sufficiently below the discharge current (110 amps) assumed for a full reverse voltage of -1.80V.

'Assuming that one cell in a 94-cell battery is at a full-reverse voltage of -1.80V, the remaining cells would be required to supply 106.80V, or 1.1484V/cell, in order to maintain a minimum battery terminal voltage of 105.OV. Per , the manufacturer has extrapolated new sizing factors for an end-voltage of 1.1484V and used the new sizing factors to recalculate the battery capacity required to satisfy the design basis requirements (LOCA-BO design basis discharge profile). The load profile data and sizing methodology was taken from 125 Vdc Diesel Auxiliary Power Battery Sizing Calculations, CNC-1381.05-00-0050 and CNC-1381.05-00-0150. Considering all possible loading scenarios, the minimum capacity margin available with one cell assumed to be in full reversal (-1.80V) was calculated to be 34%. This assumes the battery is at an end-of-life capacity of 80%, the electrolyte temperature is at the design-minimum of 602F, and that no cells are jumpered out.

Based on the discussion above and the results of the battery sizing calculations documented on Attachment 5, a DG battery remains operable and fully capable of satisfying its design requirements with one cell <1.36V on an indefinite basis.

ATTACHMENT 2 Page 8 of 8

ATTACHMENT 3 NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION

NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION Requested Change:

Revise Technical Specification (TS) Sections 3.8.4, "DC Sources - Operating"; 3.8.5 - "DC Sources - Shutdown"; and 3.8.6, "Battery Cell Parameters", to allow a Diesel Generator (DG) Battery to remain operable with no more than one cell < 1.36 Volts DC (Vdc) on float charge.

No Significant Hazards Determination:

The following discussion is a summary of the evaluation of the changes contained in these proposed amendments against the 10 CFR 50.92(c) requirements to demonstrate that all three standards are satisfied. A no significant hazards consideration is indicated if operation of the facility in accordance with the proposed amendments would not:

1. Involve a significant increase in the probability or consequences of an accident previously evaluated, or

2. Create the possibility of a new or different kind of accident from any accident previously evaluated, or

3. Involve a significant reduction in a margin of safety.

First Standard Does the change involve a significant increase in the probability or consequences of an accident previously evaluated?

No. The DC electrical power system provides-normal and emergency DC electrical power for the diesel generators, emergency auxiliaries, and control and switching during all modes of operation. This change will not affect or degrade the ability of the DC Electrical Power Systems to perform their specified safety function.

The only effect on systems, structures and components (SSCs) by this change is that with one DG battery with one cell less than 1.36 volts the system will still be considered operable. With one or more DG batteries with one or more battery cell(s) not within limits of level or temperature, sufficient capacity to supply the required load for the DG is not assumed, and the corresponding DC electrical power subsystem must be declared inoperable immediately. With one or more DG batteries with two or more battery cells not ATTACHMENT 3 Page I of 3

within limits of voltage, sufficient capacity to supply the required load for the DG is not assumed, and the corresponding DC electrical power subsystem must be declared inoperable immediately.

Surveillance (SR) 3.8.4.2 is being relocated to TS 3.8.6 as a new surveillance and the wording of the Bases section is being revised for clarity as follows: "For this surveillance, a minimum of two cells shall be tested every seven days. The cells selected for testing shall be rotated on a monthly basis." The new SR 3.8.6.5 will check the DG battery cell voltage on selected cells to ensure they are greater than or equal to 1.36 volts on a seven day frequency. This test will continue to assure that the batteries are available to perform their design functions.

This amendment will not change any previously evaluated accidents such as "Loss of Non-Emergency AC Power to Station Auxiliaries (Blackout)", "Loss of Coolant Accident (LOCA)",

and "LOCA/Blackout". The prevention and mitigation of these accidents is also not affected by this change.

The likelihood of a malfunction of the batteries is not increased by this change in the surveillances. The systems will continue to be able to perform their design functions of supplying emergency power during the evaluated accidents listed above. Therefore, the changes do not involve a significant increase in the probability or consequences of an accident previously evaluated.

Second Standard Does the change create the possibility of a new or different kind of accident from any accident previously evaluated?

No. This change does not involve a physical alteration to the plant (i.e., no new or different type of equipment will be installed) or a change in the methods governing normal plant operation. The change does not alter assumptions made in the safety analysis or licensing basis. This change will not affect or degrade the ability of the DC Electrical Power Systems to perform their specified safety function.

Therefore, the change does not create the possibility of a new or different kind of credible accident from any accident previously evaluated. -

ATTACHMENT 3 Page 2 of 3

Third Standard Does the proposed change involve a significant reduction in a margin of safety?

No. Assuming that one cell in a 94-cell battery is at a full-reverse voltage of -1.80V, the remaining cells would be required to supply 106.80V, or 1.1484V/cell, in order to maintain a minimum battery terminal voltage of 105.OV. The manufacturer has extrapolated new sizing factors for an end-voltage of 1.1484V and used the new sizing factors to recalculate the battery capacity required to satisfy the design basis requirements. The load profile data and sizing methodology was taken from 125 Vdc Diesel Auxiliary Power Battery Sizing Calculations. Considering all possible loading scenarios, the minimum capacity margin available with one cell assumed to be in full reversal (-1.80V) was calculated to be 34%. This assumes the battery is at an end-of-life capacity of 80%, the electrolyte temperature is at the design-minimum of 602 F, and that no cells are jumpered out.

Based on the discussion above and the results of the battery sizing calculations, a DG battery remains operable and fully capable of satisfying its design requirements with one cell

<1.36V on an indefinite basis. Therefore, the proposed changes listed above do not involve a significant reduction in a margin of safety.

ATTACHMENT 3 Page 3 of 3

ATTACHMENT 4 ENVIRONMENTAL IMPACT STATEMENT CONSIDERATION

ENVIRONMENTAL IMPACT STATEMENT CONSIDERATION Pursuant to 10 CFR 51.22(b), an evaluation of this license amendment request has been performed to determine whether or not it meets the criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9) of the regulations.

This amendment revises Technical Specification (TS) Sections 3.8.4, "DC Sources - Operating"; 3.8.5 - "DC Sources -

Shutdown"; and 3.8.6, "Battery Cell Parameters", to allow a Diesel Generator (DG) Battery to remain operable with no more than one cell < 1.36 Volts DC (Vdc) on float charge.

Implementation of this amendment will have no adverse impact upon the Catawba units; neither will it contribute to any additional quantity or type of effluent being available for adverse environmental impact or personnel exposure.

It has been determined there is:

1. No significant hazards consideration,

2. No significant change in the types, or significant increase in the amounts, of any effluents that may be released offsite, and

3. No significant increase in individual or cumulative occupational radiation exposures involved.

Therefore, this amendment to the Catawba Technical Specifications and associated bases meets the criteria of 10 CFR 51.22(c)(9) for categorical exclusion from an environmental impact statement.

ATTACHMENT 4 Page 1 of 1

ATTACHMENT 5 Manufacturer's Technical Justification, Battery Resizing Calculations, and Supporting Documentation ATTACHMENT 5 Page Iof 16

It V

Duke Energy - Catawba Station Battery Resizing Project Summary Sizing calculations for the Catawba Emergency Diesel Generator batteries show that there is sufficient installed capacity under all load conditions to support one cell in full reversal. It therefore follows that these batteries should be -allowed to operate with one cell at low float voltage.

Cell Reversal Scenario Batteries comprising 94 Saft SBM277 pocket-plate Ni-Cd cells provide standby power to the Catawba Emergency Diesel Generators. An occasional phenomenon -withthese cells in float service is that a small particle of active material may lodge between the plates, causing a high-resistance internal short. While this condition is normally reversible, in the short term it may affect the available capacity from the battery. If the short circuit current exceeds the float current, the cell will slowly discharge. This can be observed by means of float voltage measurements, with a discharging cell typically showing a float voltage below about 136V.

If a battery containing a low-voltage, low-capacity cell is deeply discharged, there is a possibility that the affected cell may undergo polarity reversal. Because of its reduced state of charge, the cell voltage drops more rapidly and ultimately collapses; the remaining cells continue to support the load and their discharge current effectively becomes a reverse charging current for the low cell.

Ni-Cd cells are designed wvith excess negative capacity, so the positive plate reverses before the negative. At this point the cell voltage is typically around -0.3V. This condition lasts for an extended time, and typically the discharge is terminated before full reversal is encountered. If (he affected cell was at a very low state of charge at the beginning of the discharge, it is possible that the reversal condition may last long enough for the negative to be fully depleted and to go into reversal also. For an SBM cell discharging at 20% of the rated capacity (55A for the SBM277),

the cell voltage will increase negatively to approximately -1.75V, as shown in the accompanying CELL_REV.PDF file. Tllis shows the negative plate stabilizing at 1.97V (relative to a zinc reference electrode) and the positive at 0.22V relative to zinc. The resulting cell voltage is 0.22- 1.98 =-l.75V.

The worst-case condition is one in which a high-resistance short has completely depleted the positive plate capacity. The short cannot fully discharge the negative, since the reaction aithe positive has stopped and any electrochemical process requires balancing reactions to be occurring at both the positive and the negative. On discharge the positive would reverse immediately, but it would take several minutes for the negative to reverse, based on the load currents used in these calculations.

.. . A:;A- -_. ... -. .'.t ,*-S.

(Note that a low-esistance short does not represent a worse condition than the one described above, since it would not be cleared on discharge and the short would carry some of the load current, resulting in a lesser reversal voltage.)

To be conservative, we have considered a maximum cell reversal voltage of -1.80V. Based on the test data this would be equivalent to a discharge current of at least 40% of the battery capacity, or 110A for the SBM277. Although the LOCA-110 duty cycles include some higher load currents, they are limited to the first minute of discharge when full cell reversal cannot occur. Where full reversal is a possibility later in the duty cycle, all loads are at least 30% below our 'safe' level.

From a battery viewpoint, if one cell is contributing -1.80V the remaining 93 cells must provide at least 106.80V, or 1.1484V/cell, to maintain the overall battery voltage at orabovethe minimum level of 105.OV.

It should be noted that a temporary low voltage condition lasting for several months is not damaging to Ni-i2d cells, nor is polarity reversal during discharge. In fact, vigorous gassing during reversal may help to clear the internal short, allowing the cell to recharge normally.

Baffery Resizing Calculations To validate the operation of the Catawba Emergency Diesel Generator batteries with one low voltage cell (and hence the possibility of that cell going into full reversal on discharge), the required capacity for each of the load profiles has been recalculated for an end-of-discharge voltage of 1.1484V/cell. The calculations are in accordance with IEEE Std 1115-2000, IEEE Recommnnended Practicefor Sizing Nickel-Cadmium BatteriesforStationaryApplications.

The necessary curve of capacity rating factors (S.) for these calculations, based on prolonged float operation, was produced in Microcal Origin 7.0 and is shown in Figure I below.

9 8

7 0 6 Cn 5

0 4

2 o

0.1 I 10 100 Discharge time, min Figure 1 - Capacity rating factors for SBM cells discharging to 1.1484V/cell at 77°F4 The Origin software allows highly accurate readings to be taken from such curves by plotting the x and y coordinates from a magnified view of the chart. An example of this is shown in the screen shot in Figure 2, detailing the coordinates for a discharge time of 2 minutes (x) and a K, factor of 0.870.

riLT I VIN l,.

Eo Jit.

-4I PE 11 IC 1<

TIC- 41 AS -

£ ; I liii atuhbr-=..-- :-I=i----11, -I=-,- _1-1-=--==-7-D;--,,

d-f--4-4 -- f.

la~lucllael~ljbls E1I Figure 2 - Coordinate readout for capacity rating factor curve in Origin 7.0

The KR factors used in the sizing calculations are shown in the .'SizingFactors' worksheet of the accompanying Excel workbook, 'Duke Catawba Sizing Sheetsxls,' along with the corresponding temperature factors (Td)for operation at the specified temperature of 60 0 F.

Tihe workbook contains worksheets With MMEE 1115 calculations for each of the load profiles, with each calculation including the required 1.25 aging factor. There is also a summary sheet that shows the load profiles used in the sizing calculations, the required battery capacity, and the resulting margin for the SBM277 batteries.

The load profiles used in the calculations are simplified versions of the actual profiles. In each case, however, the profiles used fully envelope all actual loads. .

Considering all possible load scenarios, the minimum margin available under the worst-case condition is 34% (i.e. the required capacity is 66% of the rated capacity of the SBM277). On this basis, it is Saft's view that these batteries may be safely operated with one low voltage cell without compromising the battery's ability to perform as specified.

Jim McDowall February 28, 2003

Cell Reverml Profile (CELLREV.PDI)

Reference Ellectrode Positive and Negative Platc Potentials During Cell Disclarge a

inc1TEST:-

WV e.f-r t - $kg. - COMCKT X8e muxcA 4.0 2.2 42.0 20.0 34.e X.0 10 34.C 20.0 1.4 1.3 16.6 10 22.0 16.6 20.0 a 14.0 Me.

0.0 46.0 14.e 12.0 C.A 1C.0 4.5 -3

4.. ... .

E .0 6.o 4.?

4 .0

- -1: q ~i piA-- WEIi 1 1 2.0

, H U Legend:

Positivc (Ni) - to - Refcrcnce Electrode Potential Negative (Cd) - to - Refcrence Electrode Potential Positive (Ni) - to - Negative Terminal Potential (negativc values not Shown) sll. *.....

Duke Energy - Catawba Station -

Battery resizing projectassuming 1 ccil reversed 1DGBALOCA-BO 2DGBALOCA43O Load Profle- Siwng Suunary Load Prore Sizng Summary Start Wme End time nun time C cTnit Rcquired Start ime Erdfm Run Gime Current Required Marin (mrm) (In) (mwn) (A) % (rum (iriv (miri) (A) Ah %

0 1 1 178.61 181.t 34% o 1 t1 178.47 181.7 34%

1 11 10 28.67 1 11 10 29.57 11 12 1 97.87 11 12 1 99.57 12 20 8 27.87 12 20 8 29.57 20 61 41 26.31 20 61 41 2a.01 61 120 59 25.75 61 120 69 27.45 1DGBASBO 2DGBAS8O Load Profile Stzing Sumrmtary Load Profile Siing Summary Start lime End Gme Run time Current Required Mar&in Start Gime End im Run rme Cmert Reqred M-&

(min) (min) Irrin) (A) Ah % (min) (ri1i) -(rrun) (A) Ahs %

0 1 1 78.85 168.5 39% 0 1 1 7852 106.8 40%

1 20 19 31.00 1 20 19 30.62 20 22 2 82.54 20 22 2 82.2 22 30 8 33.81 22 30 8 33.48 30 60 30 20.12 30 60 '30 19.80 60 61 1 72.16 60 61 1 71.84 61 239 178 20.64 61 239 178 2031 239 240 1 54.27 239 240 1 54.27 1DGBB LOCA-[0 20GB3B LOCA-B0 Load Profile Sizing Summary Load Profile Sizing Summary Start time End time Run time Current Required Margin Start time End gme Run Cme Cuenvt Required Margin (min) (min) (min) (A) N % (min) (rin) (min) (A) N %

0 1 1 177.37 180.5 35% 0 1 1 177.47 1£0.6 35 %

1 11 10 26.19 1 11 10 26.29 11 12 1 95.15 11 12 1 9525 12 20 8 25.15 12 20 8 2525 20 61 41 23.57 20 61 41 23.67 61 120 59 23.01 61 120 59 23.11 1DGBBSBO 2DGBB SBO Load Profile Sizing Summary Load Profile Sizing Summary Start time End time nun time Curcent Required Margin Start time End time nun time Curent Required Margin (mnin) (mlin) (min) (A) NA y,, (mfin) (min) (min) (A) Nl %

0 1 1 76.28 1552 44% O 1 1 77.53 155.3 44%

1 20 19 28.41 1 20 19 28.40 20 22 2 79.96 20 22 2 79.95 22 30 e 31.22 22 30 a 3122 30 60 30 17.54 30 G0 30 17.53 60 61 1 69.58 IO G1 1 69.57 61 239 178 18.05 61 239 178 18,05 239 240 1 54.27 239 240 1 5427

1. .

.;. -: . . ILZ"-,.

Ptqect DukeEnergCatawba-1DG8ALOCA-eo Date: 1M30=20O3 Page: ofl1 Lowest Expected rnum eTemp 60of CellVd a 1.1484V Cei MTg. Saft CeITtSpe.zed By.JMcD (1) (2) (3) (4) (5) (6) (7) (8)

TcpePmpe floped Section Size Change in Duration TOW to nd Capacity Rating Deang (3)x(6) x(7)

Load Load or Period of Section Factorat radorfor R313 * '

Period (amn es) (amperes) (minutes) t fin Rate (N() t ln(T Pbs.Vakies .Valkes Section 1 - frst Period Only- If A2 is greaterthan Al, go to Secion 2 1 IA1= 178.61lAI-O= 178f61lMI= 1 tM1= 11 0.761 1.07 .14S44 Sec 1 Total '14M .

Secton 2- FrstT Perods Only-llA3 Is greatertazn go to Section 3 1 IAI= JA1 0 MI= lt=&14& 01 0.00 0.00 2 lA2= IA2-A1= 0 -= t=M2= 0 0.00 0.00 2 - Total 0.. ._._ .

Section 3 - Fist Three Periods Only -It A4 Is greater Cman A3, go to Section 4 .-

1 IA1, 178.61 A1-0A 178.611MI= IrlA2.23= 1 130550.00 1AI= 28 671A27A1= -191LQ 10tILA=24l f, I2 106 I -GM. I- g20ll I97.7 A37A2= 69.21 1 It 1 0.761 1.07 56 0.00 SeC SubTotal 312E9 210.11

3. Total 102.77 Sccion 4 - F oustrP dsOnly - fASIs kreater tlan t , go to SectionS -_.

1 Al= 178.61 Alo= 178.61 M1= 1 t=M14-4= 20 13 106 299.0 0.00 2 A2, 28.67 A2-A1= -149.9 M2= 1l4j=2+WM4= 19 11560) 1.G ODO 247.94 3 A3= 97.87 A3-A2= 692 M3- 1 t=+M4-- 9 12U 1jiG 91.18 0.00 4 A4= 27.87 A4-A3= -70 M4= 8 t=M4= 8 1202 106 0110 89.19 Sec SubTotial 39088 _337.13 4 ToWtl L75 325_

SectionS- First Five Periods Only- It AG ispeater than A5, go to Section66 I IA1= 178.61IA1I0= 178.61IM1= 1lttM1+S.M=- lI Z.345 I I Jib I 4Aruj .. .

n VU.U

--. ---- I I t _ .

2 IA2= 28.67IA2-A1= -149SIM2= 101t=M24-M5= WI ZZ3Z8 l .

1.Ub U.l0u 3Go.51 3 A3= 97.87 A3-A2= 692M3J= 1 lt=M3+M44M5= 501 2.166 1.0G l 1i58.8 l 0.00 4 A4= 27.87[A4-A3= -70 M4t 8lt=M4+M5= 491 2.148 11.06 0.00 l 159.38 5 A5= 26311 A5-A4= -1 56 MS 41 t=M5= 411 2.018 1.06 0.00 334 Sec Sub Total l 598.6S 52923 5 TotaW 69.43 ... __

Section 6 - First Six Peods Only - it A7 Is rcatthan AG go to Section 7 1 A1= 178.61 Alu= 178.61 Ml.= I tdlt1._1G= 120 3217 1.04 597.57 0.00 2 A2= 28.67 A2-A1= -149.9 f2= 10 t-A2W+.M3G= 119 3202 1.04 0l00 49931 3 A3= 97.87 A3-A2= 692 &0= 1 [l=M3+.1MG= 109 3.0G6 1.04 220.t5 l 0.00 4 A4= 27.87 A4-A3= -70 W4= 8 t=M4+M54M6= 103 3.054 1.04 0O00 j 22233 5 AS= 26.31 A5-A4= -1.56l 5= 41 t=MStM6= 100 2.946 1.04 l090 4.78 6 lIA6= 25.75 lA6 PS= -0.56 l MG= 59 WAG= 59 2.312 l 1.05 l I OJD 1.36 Sec Sub Total - 81823 727.78 6 Total 90.44 _

Section 7- First Seven Periods Oni - dfA8 is eater than A7, ro to Section 8 1 Al= AA1-0= 0lMl= t=MI+..7= 0 l l 0.00 0.00 2 A2= A2-A1= 0 M2= lt=M2+.M7= 0 090 OJDl l 0.00 3 A3= A3-A2= 0 M43= t=K3+-tM7= 0 0.00 0.00 4 A4= A4-A3= 0 M4= t=1M4+.=M7= 0 l l 090 0.00 5 A5= IA5-A4= 0 M5= t-.M54MG4M7= 0 0.00 0.00 6 IA6= A6-AS= 0 M6= It=M64M7= 0 lJO 0.o0 o.oo 7 lA7= lA7-A6= 0lM7= lt=M7= 01 0u)0 0.00 Sec Sub Total 0.00 0.00 7 Total 0.00 Random Equipment Load Only (if needed)

JIAR= 0MR= tR=

-R0= ol 0.00 Maximum Section Size (9) 145.44 + Random Section Size (10) = Uncorrected Size (US) (11) 145.44 US(t2) 145.44 xDesignMargin(13) 1.00 xAgingFactor(14) 125 =(15) 181.80 When the cell size (15) is greater than a standard cell size, the next larger cell is required.

Required cell size (16) Amprere Hours. Therefore cett (17) is required.

Pn ieD t aukelEneW1gGatBawa5- 800ASlO Date: 1t0003 Paoeg d I Lowest Enxcled AnTm Tenp: 60 F Cell Vtage:1.1484V Cet ffg: Sdft *eTSez SBI Sized EhJ (1 3) - (4) (5) (7) (a)

TefaeR Fleqied Sction Size Ctaage in Daafon Tirne to End <J 9lOeS (4xfx xe x(7) d Load orPedod o(Secion *ra Factorb eRabhre Hs Pebd (atNpe-s) (ampees) (anues) (eWAs) >~ K) t mI ti) Pos em Vat akics.

Pedo 1-_______ _________ _________ ________

to Sec 1 s421 6 .. .

Section 2 - First TMtld av.# 3i a fma ,s oSc0 Secl &d Total 0.001 00

_____IA1. JA140 O l. 01 oo0 e.oo 2 '2= A2A1A- O4 =M2=O 0.00 0.00 SOC SlbTotal e.Oe 0.00 2 Total 0.00 ...

--- Sedion ti-Fist_ Te I _A11 78.851AI.O. 78 . ; lt=411442413..

lit _ __221 1 7 1.86 13A682 0.00 2 fA2 391.00 A2-AI= -47.85 42= 1914t42,43= 211 108 1t6 0.00 1s56 3 fA3s 82.54 A3-A2= 51541M3= 214t3= 2 0.J70 1 O7 4798 0.00

.Sc Sub Total 184.30 8156 3 Total - 10324 ._._.

Section 4 - Frst FOur Perbds Only - PASIs teag M. go to Section _

1 jA1= 78.85 A01. 78m8as1 .. 1t d=l+.4 30 tzz 1.0 1S28 0.00 2 jA= 31 0 Al.AI -47.851.42 I1t=142.43M4-4 291 103 1.06 0.00 91.45 3 8254 A3-A2= 5154 I3= 2z1t=3+44 10 1282- 1.0OG -- 70.04 0.00 A jA4= 33.81 PA3= -48.73144= 8 14.4-= 8 1202 t f 1.06G 0.00 W0 Sec Sb Toal 2Z.3 15354 4 Total 68.79 ...

be=ion 5 - le-st i ie Periods Onfv - NAG amat than A5,00 10 sectiOn t6 1 A1 IA10= olu Ic4A1.J. 01 _ 0.00 000 2 A2 A2.A1 0* M2= It=M2_.M.= 0 0.00 0.00 3 A3= A3A2= 0 M3 t 0 0.00 0.00 4 4- A43 0 t445 0 0.00 0.00 S AS= AS-A4= 0 t-1 t5 0 0.00 0.00 S 5cS^ Total 0.C0 O C0 S Total 0.00 .

Sectfon 8 - Fint six Perods Only - IftA7 Is g thaG MaeaterAG. co to Sectiort 7 I A.1 78.85 A1-0= 78.85 Ml- I t144I,+-MG= 61 2345 l 1.05 194.15 0.00 2 A2= 31.00 A2-Al= -47.85 bt2= 19 t=W+2.M6= 60 2.328 1.05 0.00 t1169G 3 A3= 82.54 A3-A2= 5154 M43= 2 t=M3,+_MG= 41 2.018 l 1.06 11025 0.00 4 A4= 33.81 M4-A3= -48.73 M4=- 81t=M44MS.MG= 39 1,987 l 1.OG 0.00 102.64 5 A.= 20.12 AS-A4-= -13.69 MS5= 30 t=M-S+MG= 31 1.844 l 1.06 0.00 26.76 6 AG= 72.16 A6-AS= 52.04 UIG= 1 t1=G= 1 0761 l 1D7 42.37 0.00

_Scc Sub Total 346.77 246.3G 6 Total 100.41t . ..

Section 7 - First Seven Perods Only - it AS is oreater tan A7. oo to Section 8 j__0 1 AP1 AlP-0= 0 M1= t=Mf,..M7= 0 o.00 000 2 A= A2-A1 = 0 9i2. t=M2*..M7= 0 , 000 000 3 A3= PA3-A2= 0 M13= t=A3 ..._M7. 0 { 0.00 0 00 A AA= A4-A3= 0 tA16= t=e4*M= 0.00 0 00 S A5= AS-A4= C U.= t4M644G+M7= 0 _ 0.00 0.00 G AG= AG-A4= 0 MG-l t=G4M7= 0 _ 0.00 0 00 7 A7= A7-AG= 0 l(7= t=ht7= 0J I 0 00 0 00 Lec 5..i Totat 0 00 000 7 Total 0 00 .. .

Sectiona - Fist Eight Periods Only - it A9 is than A8. go to Section 9 1 Al= 78.85 Al4-0= 78.85 Ml= 1 t=MI...M8= 240 4.754 1.03 38G.10 0.00 2 A2= 31.00 A2A1= -478 M2= 19 t=M2.M8= 239 4.740 1.03 0.00 233.61 3 A3= 8254 A3-A2= 5154 L3= 2 t=A3 ....M8= 220 4518 1.04 242.17 0.00 4 A4= 33.81 A4-A3= -48.73 4= 8 t4.14,.-M8 218 4.490 1.04 o0.0 22755 5 AS= 20.12 A5-A4= -13.69 G5' 30 t=MS..J8= 210 4398 1.04 0.00 2CL62 6 A-= 72.16 AGA45= 52.014 1G- 1 t=14647A8= 180 4.044 1.04 218.87 0.00 7 A7= 20.64 A7,A6= -51.52 M7= 178 =4M7,M1= 1791 4.031 1 1.04 0.00 215.98 8 A8= 5427 A8-A7= 3363 1l8= lt=M8= 1 0.7G1 1.07 27.38 l 000 Sec Sub Totl 87452 739.76 8 Total 134.76 l

Random EuipMlet Load Onlt (if needed) fl IAR= IAR0= 0148= t=MF= 0 0 axirnRrn Section Size (9) 134.76

Qandom Section Size ( 10) _ = Lrrected Size (US) (1 t) 134.76 US(12) 134.76 xDesignMargin(13) 1.00 xAgingFactor(14) 125 =(15) 168.45 When the cell size (15) is greater tun a slandand celt size, the next latger cell is required Required cell size (I 6) Apere I kurs,Therefore CeC(17) _ __is ,eqiired*

,.. . 1, .,

2-i .. 4...

Pavect DukeEneiWCl~atawba-lDG8SLOGCA40 Date: lr0O3 Page: .1 oti Lowest Expected *nrurn eTernp: 60 F Cell Vtagc:1.1484V Cel Mfg Satt Cel Tpe:SY SStzed By JMcD (1) (2) (3) J (4) (5) (6) (7) (8).

in Taenaature Reqsred Sedhin Sizc Change Daon Tme to End Capa ling Deang (3) x (6) x (7)

Load Load or Period otSection Factor at Factor for ated hprs Pefiod (amnperes) (amperes) l(ininutes) (Minutes) t hn Rate (fa) I Min (7V Pos. Values Neg. Values Section 1 - Rrst Period y -tA2 greater thanAl, go to Sectlon 2 1 JA1= 177.37lA10= 177.37lM1= 1lt=M1= 1 0.761 1.07 1 Sec I Total I144A3 .

Section 2 - First Two Periods Only - it A3 Is Vreater than A2, go to Secbon S 1 A1= A10. O M1= t=M1M2=- 0I 0.00 0.00 2 A2= A2-A1= 0 O= t=m21 0! 0.00 0.00

.Total 2 Om .00.--

2 _ 0

_Total . .0 Section 3 - First Three Periods Only - if PA s reater than A3. go to Section 4 1 Al= 177.371A1-G= 177.371M1= lt=M1+M2+M33= 1?4 1.355 1.06 25476 0.00 2 A2= 26.19 A2-A1= -1512 M2= 10 t=M2+3 Il 1.322 1.06 0.00 211.85 3 A3S 95.15 A3-A2= 68.96 M3= I t=M3= 1 0.761 1.07 515 -1 0.00 See SubTotal 31091 211.85 3 Total 99.06 .

Section 4 - First Fou Periods Only - i AS Is reater tan P4, go to Section S --

1 A1= 177.37 A140= 177.37 M1= 1 t=M1+.Ai4= 20 1583 f 1.06 297i2 0.00 2 A2= 26.19 A2-A1= -1512 M2=- 10 t=M2+iM434MA4= 19 1.5i

-cm06 0.00 249.99

_ A3= 95.15 A3-A2= 68.96 M3-. 1 t=M3+M4= 9 1243 1.06t 90.86 0.00 4 = 25.1 A4-A3= -70 M4= 8 t=A4= a 1.06i O.00 89.19 Sec Sub Total 388A8 339.18 4 Total 49.30 ...

Section 5 - First Fiv Periods Only - if AG Is reater han A5, go to Section 6t 1 IA1= 177.37 A1O= 177.37 M1= I1 t=Ml+.JA5= 611 2345 l 1.05 436.73 0.00 2 A2= 26.19 A2-A1= -1512 M2= 10tO=2+J.M5= GOl 2.328 1.05 0.00 369.54 3 A3= 95.15 A3-A2= 68.96 M3= t=M3tM4+A5= 2.166 1.06 158. 0.00 4 IA4= 25.15 A4-A3= -70 M4= 8 t=M44M5= 49 2.148 l 1. t i 0.00 l 15938 5 IA5= 23.57 AS-A4= -1.58 M-= 41 t=MS= 41 2.018 1.06 0.00 338 Sec SubTotal 595.06 532.31 5 Total 62.75 __*-

Section 6 - First Six Periods Only - It A7 is grcat rthan AG6go to Section 7 1 lA1= 177.37 Al-0= 177.37 Ml= I 120 3217 1.04 [5932 0.00 2 lA2= 26.19 A2-A1= -1512 M2= 10 t=M2+_M6= 119 3.202 11.04 l 0.00 503.A4 3 lA3= 95.15 A3-A2= 68.96 M3= i t=M3....M= 109 3.0Gt J 1.04 4 219.89 0.00 4 lA4= 25.15lA4-A3= -70 M4= 8 t=M4+tMS+MrG= 108j 3.054 1.04 0.00 222.33 5 IA5= 23.571 A5-A4= -1.58 M5= 41 t-M5+M36= 100 2.94G 1 1.04 1 0.00 4.84 6 IA6= 23.01 A6-A5= -0.56 MG= 59 t=M= 59 A 2*312 1.05 0.00 1.36 Sec Sub Total 813.31 731.937 6 Totat J. 8131b4

-.- - A Section 7 - First Seven Periods Only - if A8 g eat A7, go to Section 8 1 A1= A1-0= 0 Ml= =M14M7= 0l 0 I l 0 0 2 A2= A2-A1= 0 M2= t4A2+.J47= 0° l l 0 0 3 A3= l A3A2= 0oM3= t!=W3+...M7= 0 _ _ 4 0 0 4 A4= A4-A3= 0 tA4= t=M4+.M7= 0° l 0 0 5 AS= AS-A4= 0 MS= tt=*AS+MG6M7= 0_ 0 0 6 lA6= AG-A5= 0 MG= t-MG4M7= 0J 0 0 7 lA7= IA7-A6= 0lM7= t=M7= _ _ l 0 0 Sec Sub Total 0 0 7 Total 0 ...

Random Eeuipment Load Only (it needed) 1R AR= lAR-= O0MR= It=MR= o0 o Maximum Section Size (9) 144.43 + Random Section Sizc (10) = Uncorrected Size (US) (11) 144.43 US(12) 144.43 xDesignMargin(13) 1.00 xAgingFactor(14) 125 =(15) 180.54 When the cell size (15) is greater than a standard cell size, the next larger cell is required.

Required cell size (16) . . Ampere Hours. Therefore ccll (17) . . is required.

- -. . . . -.-:-e -- -. . :

Prject D<uke ergy/CatCawba -10G8850 SCule 1/3MM Pagm Id I Lowest Epccted MuirGwml e Tenp: 60eF Cell Vtage:11.1484V Cell Mt Satt Cell Type: SOM Sized W. JMc (11 I (2) l (3) 1 (4) 1 (5 l (i) I_ (7) I (X)

Ternperature Heqrdz Sdeon SIzM Change in CDXalon Thnlo End CapacityR'afn DearVg (3)x(GI x(7)

Load Load orPedod O(Section factrst Faclork - Rated ArIrs Neriod (arnroes)I (icutes)) (rminRtes) t MmnRabte (KU9 tM (T PcValues Section i- First PeidOnly -if A2 e A to seio2 1GA1 7628A1.OS 7628141= 1 1=- I1 0.761 1.07 l'C11 SecI TOaW 62.11 Section 2 - fist Two Peds Ony -fifA3ae gra AZ g t Section 1 A1' AIA4=

A=Mt 0 ItMf142' 0 l 0.00 0.00 2.A2' ,A2-A 0 0.00 1 0.00 2.Sec Stb TOW l 0.00 0.00 2 Total 0.00.

Section 3 gfirst1 e :: . G.----'. -.. -.- . . _ _ _.a-.

1 1Al 76281A140= 7628tMt. tI 1t4#KM3= 221 1 7 1.06 13236 0.00 2 -A2. 2841 A2A1= -47.87 1W= 19 1t=2+43. 21 1 1.08 1.06 0.00 81.59

-3 SA3= 79.96 A3A2- S1S5A 2l t j0 47.99 0.00 Sec .&Sib Total 180.35 81.59

3 Total [.08.76 ... __

Section 4 -First Fouir Perid Only- H AS Is greater than 4.go lo SectionS ___

1 A1' 7628 A140= 7628 M1t 1 t=M1+..A44= 30 1.22 1.0G 147.3Z 0.00 2 A2= 28A.1 A2.A= 47.8I= 19 t=h2+M344 291 1.803 1 000 91A9 3 A3= 79.96 A3-A2= 51S M3= 2 t=434 10 1282 1.0 _ 70.05 .0.00 4 A4= 3122 A4-A3-- -48.74jM4= 8 1444= t 1202 1.06 0.00 62.10 Sec Sub Total 217.37 153.59 4 Total C3.78 .

Section S - First Five Periods On AGis iaterthan AS go to Section 6 Ity-1- A1= A14=0 0M1= mlI .. JAS= 0 0.00 0.00 2 A2= A2-A O M2= t= 2+0 0.00 0.00 3 A3-A2= 0 M3=I t 01 0.00 000 4 A4-A3- 0 M44 t444M 5 0.00 0.00 S AS AS-A4= 00.00 0.00 -

Sec Sub Total 0.00 0.00 5 Total 0.00 ...

Section 6 - Firs Six Penods Only - It A7 is greater than A6. go to Section 7 I All 7628 A140= 7628 MI: 1 tl1+.M6= 61 2.45 1.05 l 187.82 0.00 2 A2= 28.41 A2-Al= -47.87 M2= 19 t=W+2.M6= 601 23Z8 1.05 0.00 117.01 3 A3= 79.96 A3,A2= 51.5 tS -3tM3G=

= 41 2_0_8 1.0_1027

_ 0.00 4 A4= 3122 A4-A3= -48.74 tl4= 8 =t14454MG= 391 1.987 1.06 000 102.66 AS= 17.54 A5-A4= -13.68 QS= 30 t t31l 1B44 i 1.0G6 l 0.00 2G.74 6 AG= 9.58 A6-AS= 5204 M6-- 1 t=MG= 1 0.761 1.07 42.37 0.00 Sec Sub Total 1 340 46 24G.41 6 Total 94.05 '- '

Section 7 - First Seven Periods Oy!-i A8 is qreater than A7. qoto Section 8 1 Al= Alo. O0al.- t--M1+._M7= ol0 l1 000 0100 2 A2= A2-A1= 0 Wr2= lt=M2+_..S7= 0

°l 0l00 0l00 3 A3= A3-A2= 0 o3lh t=M3+.M7= 00 000 0 00 4 A4= A4-A3= 0 144= t=M4+.M7= 0 l l 000 0l00 S AS= A5-A4= .- O M1= t445.146M17= 0 _ 0.00 0.00 6 AG= A6-AS= 01MG=

MG--6.tt7= 0 1 1 0.00 0 00 7 A7?. A7-AG= 0lh7- t447= 0 _ l 0.00 0l00 Sec S'b Totat 00 0l00 Section 8 - First Eiqht Penods Only - i8A9 is creater than A8. go to Section 9 7 _ Total ______

1 IAI 7628 Al 0= 7628 Ml= I t=IM1..ld8= 240 4.754 1.03 37351 0.00 2 lA2= 28.41 A2-A1= .47.87l2= 19 t=M2._M8= 239 4.740 1.03 0.00 23371 3 lA3= 79.96 A3-A2= 51.55 M3- 2 t3..t 220 4518 1.04 242.22 000 4 AA= 3122 A4-A3= .48.7414= 8 t=M4+-M8= 218 4.490 1.04 000 227.60 lAS= 17.54lA-A4= -13.G8 MS= 30 t=fA5+.t8= 210 4.398 1.04 000 62.57 G IAG= 69.58 AG-A5= 52.04 MG-- I t=fMG4WMZ+= 1so0 4044 1.04 l218.87 l 0.00 7 A7= 18 05lA7-AG= -51.531 7= 178 t=1741A8= 179 4.031 1.04 0.00 216.03 8 IA8 5427lA8-A7= 3622l14W= 1ftm8= 1l 0.7G 1.07 2949 0l00 Sec Sub Total 86409 739390 Random Equipment Load Only (it needed)

R lArt= ARO0 0l4R= lt=m= 0 0 MaximurmSectionSize(9) 124.19 *ftRndormScctionSize(10) _ =UncoTcdeedSizc JS)(11) 124.19 US(12) 124.19 xDesignt argin(I3) 1.00 x A VgFactor (t4) 1.25 = (t5) 155.24 When the WIl size (15) is greater than a standad cell size. the nexI larger ccll is required fiequired cell size (16) Anpere Iours. Therefore cell (I7) is required

I :.

Prolect DukelEnergy/Catawba -2DG8ALOCA-BO Date: 1130'2003 Page: 1 Of 1 Lowest Expected Krnim=m BectrdyteTOpW, 60 *F Cel Voltage: 1.1484V Cell Mg: Saft Cel Type: MM Sized Br: JMcD (1(2) (3) (4) (5) (6) (7)(8)

Teerisature Required Section Size Change hI Duration ane lo End Capadit Rating Deraling , (3) x (6) x (7)

Load orPeriod of Secion F1abcat Factor or .Rated Am Hrs i Perod (amweres) (anmeresi (minutesi (ninutes' t Mitn Rate (fK) t lMn () Pos. Valuesl Neo- VahmK Secton1- rst Pedod Only- i A2 Is gcater tian Al 0go to Sc(_ion2 1 IA1= 1787 A1A-0 178A71MI= 1It=M1= 11 .7 1i It.07 145 ..

Seci Total 145_

Section 2 - First Two Periods Onlv- If A3 ks greatertan A2, ao to Section 3_

1 IA1: AI-O= 0M1= t=mZ= 01 0.00 0.00 2 lA2= IA2-A1= 0 M2= r 0 0.00 0.00

5cc * -SubTotal 0 - 00u0-- --. .. ....

Z -iotaij I emu

. _I_..

Section 3- First Three Periods OnlyO-It A Is areater gm A3. go 10 Section 4 1 Al= 178.47lA1- 178A7lM1= lt=M1+M24ul3= 121 1U355 1.06 l 256.34 1 0.0U 2 IA2= 29.57lA2-A1= -148.9M2= 10lt=4M3= 11 -132 - 106 J 000 208.66 3 A3= 9957 A3-A2= 70lM3= 1 1I r61 1.07 57.00 0.00 Smc .Sub Total l 313.4 208.66 3 Total 104.8M 1 Section 4 - First Four Penods Only - If AS is ireater ffan , go to Section 5 2 JA1= 178A7l-A14= 178.A7 Ml= IOt=L1A+-MM 2011 1583 l 10G 0.2990 2 A2= 2957 A2-A1= -148.4 M2= 1( M=4=

O=*AI 20 1.56U 1.06 0.007 Z462 3 jA3= 99.57 A3-A2= 70 M3= 1 t=M3lM= 9 1 1OG 0 9223 0.00 4 4A4= 2957 A4-A3= -70 M4= t E 1202 1.06 0.00 89.19 Sec Sub Total 391.70 335A1 4 Total 5629 _

Section S - Frst five Periods Only - if A6 is greater than AS. go b Section 6 1 JA1= 178A7lA1-0= 178A7 M1= 1l=MI*.JAS= 611 2.345 1.05 l 439.44 0.00 2 lA2= 29S57JA2-A1= -148.9 M2= 10 t=M2+.AS= 60° 2328 1.05 0.00 3.97 3 1A3= 99.571A3-A2=- 701M3= I1t=WM~iM4M5= 501 2.166 l 1.0 160.72 0.00 4 1A4= 29.571A4-A3= - -701M4= 81t=M44M5= 491 2.148 I 1.06 0.00 159.38 5 lAS= 28.01lA5-A4= -1.56 M5= 41 t=M5= 411 2018 I 1.0G 0.00 3.34 Scc SubTotal 600.15 526.69 5 Total l 73.47 ...

Section 6 - First Sx PCods Only - if A7 is eater than AS go to Section 7 1 lA= 178.7 Al 0= 178.47 AI= I t-=MI..M= 120 3217 1.44 597.10 0.00 2 A2= 29.57e= M2= 10 t=M2+-JAG= 119 3202 1.04 0.00 495.65 3 lA3= 99.57lA3-A2= 70 M3= I 109l 3OG6 1.04 223.20 0.00 4 IA4= 29.571A4-A3= -70 M4= 8 t=M44M54ItAG= 108 3.054 1.04 0.00 222M 5 lA5= 28.01 A5-A4= -1.56 MS= 41 t=M54MG= 100 2.946 1.04 0.Do 4.78 6 IA6= 27AS AG-A5= -0.5G MG= 59[t=MG= 59 2,312 1.05 0.00 136 Scc Sub Total 82031 724.32 6 Total 95.99 1______

Section 7-First Seven Periods Onty - if A is reater than A7, go to Section 8 I lA1= IAl OlMl= t=Ml -+.7= 0 0 0 2 A2= A2-A1= 0 M2= t=M2+.M7= 01 0 0 3 IA32=I 0M3= t=M3+-7= 0 0 0 4 IA4= A4-A3= 0 M4= It=M4+M7= 0° I 1 0 0 5 IA5= A5-A4= 0 M5= It-M54MG+M7= 01 1 1 0 0 6 IAG= A6-A5= 0 M6= t=-MG4M7= 0o 0 0 7 A7= IA7-A6= 0lM7= lt-M7= 0l 0 0 Sec Sub Total 0 0 7 Total 0 ...

Random tquipment Load Onty (it needed)

R JAR= JAR-0= o0MR= It-MR= 01 0 Maximum Section Size (9) 145.32 + RandomSection Size (10) = Uncorrected Size (US) (11) 145.32 US(12) 145.32 xDcsignMargin(13) 1.00 xAgingFactor(14) 1.25 =(15) 181.65 When the cell size (15) is greater than a standard cell size, the next larger cell is required.

Required cclH size (16) Ampere Hours. Therefore cell (17) . . is required.

Pmfect ODu wEglCatawba -2DGBASOO Date: MtY Page: Id I Lowest Eipeced M~ini E Te: 60'If CeOVo 1.1484V CeO Mig: Saft Cell Tpe: SIMA SLad Or JA (t) (2) (3) (4) (5) (6) (7) .8)

L Tepeiatu e1 PReqAd Seioni 5ze Camwngh l Duration Trne to End capacity Raring Dcrtig t3) x () x (7)

Load Load o perwd d Sedion Fa~ at Facior ed s Pedod (arnprkmsi (ampcms) l(n*csJ l (nesXA) tlnatt tsat VajesINmqV2kjes Section 1 - Furst Pe=io Onyf A2 Is gae hnAl. g0 to Sedtion 2639 1 I= 7852 A1= M ERV 1l M1= 11 0761 107 6194 ..

Sec1 Tot1 63.94 Section2-FiRrst TvIo Pe rbdOZI Alsa e _ nA 2_ __

1 A. IA14= OMI.

a =m814Z 0° a1m 0.00 2 lA2. 1A2-A. 0J!4M2- SI 0.0 0G00 Sec S5d Total am~ 0.00 2 Total [ o00 Section frstlPedrlodsOnil, A4 s p ea ied - ::-- _

t )AI, 78521AO05 7a.521141= 1"t 4W41 2; tfi37 106 13625 0.00 2 JA2. 30.62 A2-A1- -47'M2- 1t9 t24)3. 211 t J 1_06 100O 8164 3 )A3s 82222 A3-A2. 5t.6M3= 2 t:21 0.70 1.07 4a3 0.00 Sec -Sib Total 1 18428 I81.

3 TOal 1 10264 1 ...

Section 4 - First Four Peods Only - f AS Is greatcr than .go Section 5 1 lAl- 78.52 Al -C 78.52114= 1 tA1,...M4= 30 1.22 1.06 151.85 0o0

-2 I 30._2 A2A1 1M.2- 19 j t 291 1.803 tD6 o0.0 55 3 A3= 8222 A3-A2= 51.C iM3= 2 t4134 , 10 1282 1D06 _ 70.2 o 4 A4=- 33.48 A4-3 -48.74 1K4. 8 t=&"4= 8 1202 1.06 0.00 [ 2.10 Sec Sub Total Z2.77 15165 4 Total 6812 ...

Section 5 - First Five Pe i Only-U O AG Isgreate_ Omn AS oo Section 6 1 JAl. A1.0= OMi- 1t1....M5= 01 0.00 0.00 2 A2= A20AI 1O2= It=W2+_5= 0 O.0 0.00 3 A3= A3-A2= 0 M3= 0 000 0.00 A4-= A4A43= 0 M4= 0.00 5 A5= A5-A4= 0 M= t= 0 0.00 0.00 Sec Sub Total 0.00 0.00 5 Total o000 -

Section 6 - First Six Periocs Only - A7 iss gtcater than A6. go to Section 7 Al. 78.52 A1-0= 78.52 Mil 1 t=MIt+M6- . 61 2.345 1.05 193.34 0.00 2 A2= 30.62 A2-A1. -47.9 M= 19 tz=..+Jv.= 60 2.328 1.05 . 000 _117.09 3 A3= 8222 A3-A2= 51.6 M3= 2 t 6M3+.MG= 41 2.018 1.0 11038 0.00 A A4= 33.48 A4A3= -48.74 ht4= ,, t=4444+M5.6. 39 1.87 1.06 0o.0 102.66 5 AS-- 19.80 A5-A4= -13.G8 M5= 30 tM==5416 31 1.844 1.06 0.00 2G.74 6 AG= 71.84 A6-A5= 52.04 btG= I t=tfGf, t 0-761 1.07 42.37 o-ao Sec Sub ToWat 346.09 246.48

_ _ G Total .-.

.9..0 Section 7 - First Seven Penods Ont-K A8 is qreater than A7, 0o to Section 8 1 lA1= Al-C 0=MI t1W+...M7. 0 0t00 _0300 2 A2= A2-Al= 0 M2= t=l.01il7. 0 0.00 l 00 3 A3-- A3-A2= 0 M3= t=tA3+_M7- °l '.0 l 0°° -° A AA= A4-A3= 0 M4= tt__+ 7 0 00 000 6 AS= A-AM= t Ms= t6455+MG6, 7 0 0.00 000 3 AG= A3SA2 0 MG= cAti5M7- 0 OD0 O0 7 A7. A7-AG= 0 M7= t17= 00 000 000 Sec Sub Total 0.00 0100 7 Total 00 t Section 8 - First lGht Pcds Only - A9 is greater ttan A8 go to Section 9 __

1 Al= 78.52 A1-= 78.52 Ma= I 1*1,.J= 240 4.754 1.03 384.48 0l00 2 A2= 3062JA2-Al. -479 M2= 19 t42._.58 239 4.740 1.03 0l00 233-86 3 A3= 8222 A3-A2= 51 6 M3-= 2 20 230M8= 4.518 1.04 242.45 0o00 4 A4= 33.48 A4,A3 -4874 lt4= 8 t=44+4M8= 218 4A90 l 1.04 l O00 227.G0 5 AS= 19.80 AS-A4= 1368 MS= 3 t=145+.MS= 210 4.398 1.04 1000 62.57 6 AG= 71.84 AGAA5= 52G04M 1MG=t=MG6,7.8= 180 4.044 1.04 218287 000 7 IA7= 2031 A7AG -51.31Mi. 178 4M74)48= 179 4.031 1.04 000 2t603 8 A8= 5427 A8-A7= 339GlM8= 1148.= 1 0.761 1.07 27.65 0l00 SecC Sb Total 8734G 74005 8 Tota't 1341 -'

Randorn Equipent Load Only (it needed)

Ft lA= lAFl= 0 8= O I I O I '

Ua~dmnm Sction Size(9) 133.41 RandoMrSectnSizc(t0) _ _= UneCTCedSire(US)(11) 133.41 US(12) 133.41 xDesignMargin(13) 1.00 xAgingFactorI(14) 1.25 =(15) 166.76 When 'the cel sizc (15) is greater than a standard cfli size. thc nest larger cel is refquired Rcquired cellsize (16) .Aperex hours.Therteore cCetl(17) is required

Pipecti DukeEgYlCatawba-2DG88LOCA-BO Date: 1202W3 Page: 1o Lowest Expected MPiimuI lkctreoye Temp: 60 OF Cell Voltage: 1.1484V Cell MTg Salt Cd Type: S8m _- Sied_.

(1) (2) 1 (3) (4) (5) (6) (7) 1 (8)

. TemperabreeqMied Sectin Size PoChange in Oeitiod Time to End Capacoty RaCtng Derating (3) x (6) x (7)

Load ", Load cc Period of Section E -aclora rEaco Ifo - aed Amp Hrs _

Pediod (amperels) (amperes sominutes) (mintles) - t Ihn Raed (M) tern (T Po-aus~qvle Section 1 - Firt Period Only - If A2 is greater than Al. go to Section 2 1 IA1= 177.47 A1-0= 177.471MI= 1 t=MI= 1 0.761 1.07 14451 Sect Total 1 1445 Section 2 - rst Two Periods Only - If A3 Is reate Mman go c2. to Section 3 1 TAl - .A1-0= OM1= lt4AI4M2 01 0.00 0o00 2 A2= A2-A1= 0M= ItA2v 0 0.00 0.00

. .- ._.. . ,* r. h-oal-. .....-..... _:fl ... -00 -.-. .

2- Total I 0.00 I ..

Section3- Fifst Three Peeiodsonl-JiM Isreater than A3, go o Section 4 __

A t77A71A1.0- 17747 A;M1= 1ijt4A4M+M3- 121. 1.355 l 1.06 254-90 0.00 2 2629A2-A -= 10I=M2+A3- 11 12 1.06 0.00 211.85 3 A3= 9525I A3-A2= 68.96I3t- 1 It=1a3= 1 0.761 l 1.07 56.15 0.00 Sec SubTotal 311.05 211.85 3 Total 9920 ...

Section 4 - First Four Perods Only - If A5 Is Ireater than A4, go to Section 5 I A1=. 177.47 A1 177A.7 MI= 1 t=M1+.A4= 20 1.583 1.06 97.9 0.00 2 IA2= 2629 A2-A1= -1512 t2= 10 t=M2.M.34t,4= 19 1.560 1.06 0.00 249.99 3 A3= 95.25 A3-A2= 689 M 1 t=M3*M4= 9 1243 1.06 l 90.86 0.00 4 A4= 25.25 A4-A3= -70 M4= 8 t=M4= 8 1.202 1.06 l 0.00 89.19 Sec Sub Total 388.65 339.18 4 Total 49.47 ...

Section 5 - First Five Periods Only - if AG is I reater than A5, o to Section 6 1 A1= 177.47 A1-0= 177A7 M1= 1 it=M4-.M5= 61l 2.345 1.05 43638 0.00 2 A2= 2629 A2-A1= -1512 M2= 10 t=M2+_.M5= 60 2328 1.05 0.00 3G9.54*

3 A3= 95.25 A3-A2= 68.9G M3= lt=M3.M4+M5= 50 216G 1.06 158.3 0.00 4 A4= 2525 A4-A3= - ^70 M4- . 8 t=M44M5= 49 . Z148 .... O..1.0G-.z. -i'0.00 s* t159.38 5 A5= 23.67 AS-A4= '-1.58 MS= 41 t=MS= 41 2.018 . 1.0G 0.00 M3.38 '

Sec Sub Total 595.30 532.31 5 Total 63.00 Section 6 - First Six Perods Only - it A7 is greater than AG qo to Section 7 I A[= 177.47 A1-0= 177A7 MI= 1 t=M1+.MG= 120 3217 l 1.04 l 593.76 0.00 2 A2= 2G29 A2-A1= -1512 M2= 10 t=M2+JvG= 1191 3.202 1 1.04 0.00 503.44 3 A3= 9525 A3-A2= 68.96 M3= It=M3+...MG= 1091 3.0GG 1.04 l 219.89 0.00 4 A4= 2525 A4-A3= -70 M4= 8 t=M+M54M6= 1081 3.054 1.04 l 0.00 222.33 5 A5- 23.67 A5-A4= -1.58 M5= 41 t=M5t.MG= 100 2.946 1.04 j 0.00 4.84 6 A6=~ 23.11 AG-A5= -0S56 tAlG= 59lt=-M6= 591 2,1 1.05 l 0 00 l 1.3G Sec Sub Total 813.65 731.97 6 Total 81.67 _

Section 7 - First Seven Penods Ont - if A is greater than A7 go to Section 8 I lAl= IA1-0= 0 M1= t=MI+_TM7= 0 0 0 2 _ A2= IA2 Al- 0 M2= t=M2+...A7= 0 0 0 3 lA3= IA3-A2= 0 M3= -tM3.Jt47= ° l l 4 IA4= lA4-A3= 0M4= (=M4+_7= 0 I I s lAS= lAS-A4= OlMS= lt=MS.MG4M7= °l 1 1 3 6 IAG= lAG-AS= 0 MG= .t-M64h7= 0 _ _ 0 0 7 IA7=

_A7-A6= 0IM7= It-17= 01 1 _ 1 0 1 Sec Sub Total 0 0 7 Total o0 Random Equipment Load Only (it needed)

R JAR= IAR-0= 0lMR= It=-MR= 0o ' 0 Maximum Section Size (9) 144.51 4 Random Section Size (10) ___ = Uncorrected Size (US) (11) 14451 US (12) 144.51 xDesignMargin(13) 1.00 xAgingFactor(14) 125 =(15) 180.64 When the cell size (15) is greater than a standard cell size, the next larger cell is required.

Required cell size (16) Anpere Hours. Therefore cell (17) is required.

I r. I Pi*ct D eulneWvCatawba -20Gl0 80 Oate: t0I2003 Page, i14 ect eN~d Eow winitir Temo: 60 F Ce Vftagc t.1484V CeO Mfg:Saft CeflType:S5 J Sbed W. JUcD (1) (2) (3) (4) (5) (6) (7) . (8)

Teayerabqn3 fie d Section Size alnge i Dura6on 'rme to End Capadty Rating Oera J (3)x(6)x()

Ltoad Lod or Period 4d e&ion Factorial F~adori br te d AmnptHls Period (amperes) (amper) (minutes) (mnutes) t Min Rate 0)J tlQh(rr) Pos-Vakiesi"-Vahes Section 1 - frst Period Only- It A2 Is g1eater tn Al. golo Secton 2 1 JAI= 77.531A1-0= 77.53 P4=-. , 1 44=u 1 0.761 1.07 G3.113 Z Sec 1 Total G3.

Section 2- Ft Two Pedods Only-I A3 is Eaterllan AZgo lo Sedbn 3 I A1= A .014 2 0 0.00 000 2 A2= A2-A1= 012= = 0 000 000

-- Sec SaToblOl0 0 00 2 Toal 0.00 ...

- -Secion 3. Fgrst Three Periods Only- 11.4 ls geatereiarIA3~o toSeti __;t_:

1 lAl. 77-531A1- 77.531M1= lIt=A4A24w3 221 1.637 I 1.06 I 134.53 I 0.00 2 !A2= 28.40 A2-Al= -49.13 M2= 419 211 1.608 1 1.G l 0.00 l 8.74 JA3 79.95 A3-A2= 51.55 M3= 21t43- 21 0.870 l 1.07 47.99 0.00 Sec Sub Total t1n 83.74 3 Total 98.78 ..

Section 4 - First Four Periods Only - iS Is greater than M.go to Seco S IAt= 77. AI10= 77.531P4= 1t4 JA44= 30 1.822 1.OG 149.74 0.00 2 JA2= 28.40 A2-1= -49.131 M2= 19t=U2+A34M4- 291 1.B03 J 1G 0.00 93.90 3 A3= 79.9 A3-A2= 51.55' M3= 2it=43.M4= 10 1282 1.0G - 70.05 OJDO.

4 MA4= 3122 M4-A3---48.73X44= 81t=444= 8 1202 1.0G 0.00 &2.09 Sec SillTotal 219.79 155.98 4Total 63.80 -

Section S - First Five Periods Only - if AG Is great&r than AS. go to Section 6 1 Al. A14= 0 M1l= M+L5=

I 01 0.00 0.00 2 A2= A2-A1, 0 W2= I 0l 0.00 0.00 3 A3-= A3-A2= 0 M3= tM4+M= 0 O.OO OO0 4 A4= M A4-A3= 0PM4= 4 0.00 0.00 S As= A5-A4= 0 hS= tM 0 0.00 0.00 Sec Sib Total 0.00 0.00 5 Total 0.00 Section 6 - First Six Pe ondsOly- i aters than lGoSection77 - * . - . ... - ,

I Al- 77.53 A1-=O-' 77.53 PR1=."1 t41,.J --R EFI 2.345

l1.05 Pl .19i0.90 .0.00 ;

2 A2= 28.40 A2-A1= -49.13 M2= 19 t=M2LV+.1M- fRER 2.328 1.05 0.00 120.09 3 A3= 79.95 A3-A2= 51.55 M3= 2 t=M33...M6+ CREP 2.018 1.OG 11027 0.00 4 M4= 3122 A4-A3= -48.73 M4= t t=M4+MS4AGP4= CREF 1.987 1.06 0.00 t10264 5 AS= 17.53 A5-A4= -13.69 M5= 30 t=MS.PMG= rREFI 1.844 1.06 0.00 26.76 6 A6= 6957 A6-A5= 52.04 MG= 1 t=MG4= CREF 0.761 1.07 42.37 0.00 SCC Sub Tolal 343.54 249.49 6 Total 94.05 ...

Section 7 - First Seven Periods Only - if A8As greater than A7 to Section 8 1 IA1= AI-0= OlMl= l%=m1._.147= 61l 0l0i 0°00 2 A2= A2-AI= 0 1.2= t=1424.-47= t 00 00 000 3 A3= IA3A2= 0PM.3= 1'I=f1*47= 41 0100 0l00 4 IA4= A4-A3-= 0l4= i=A4+_.17= 39 _ __ 0 00 0.00 5 A5= A5-A4= 0 lh5= t4546.M47= 31l 0lO0 000 6 IA6= I6-A5= 0 MG= 1t44M7= 1 0l00 0°00 7 1A7= A7-A6= 0 M7= t=M_7= IO0 l .00 Sec Sill Total 000 .000 7 Total I 0 l00 Section 8 - Frst Eight Periods Only - it A9 is greater than A. go to Section 9 I IA1= 77.53 A1 0= 77.53 M1= 1 t=M1+_M8= 240 4.754 1.03 37963 0l00 2 A2= 28.40 A2-AI= -49.13 M2= 19 =12+,.M8= 239 4.740 1.03 0l00 23986 3 A3= 79.95 A3-A2= 5155 PM3= 2 +=M3._M8= 220 458 1.04 242.22 000 4 IA4= 3122 A4-A3= -48.73 M4= 8 =144M.M8= 218 4.490 1.04 0l00 227.55 5 A5= 17.53 A5-A4= -1369 M5= 30 1=M5+__M8= 210 4398 1.04 0l00 l 2.62 6 A6= 6957 A6-AS= 52.04 MG= 1 =W46M7*M8= 180 4.044 1.04 21887 0l00 7 IA7= 18.05lA7-A6= -5152lM7^ 1781t=M74M8= 179 4.031 1.04 000 21598 8 IA8= 5427l8A7= 3622lM,8= 1h=g= 11 0.7G1 1.07 29.49 0100 Sec Sub Total 87021 746.01 8 Total 12420 -- -

Random EquipmentMoad Only (it needed) lOrt= IAR .O= 0lMR1= :tmR= 0l 0 MaximrumSectionSizc(9) 124.20 Rtandom SectionSizC(10) = Uncorreted Size (US) (11) 124.20 US(12) 124.20 xDesignMarqin(13) 1.00 xAgingFactor(14) 1.25 =(15) 15525 When the cell size (15) is greater than a standard cell size. the nerd larger cell is required.

Required ceil size (16) PJTApCIOlours. Therefore cll (17) is requiredL

4 ads Sizing factors for SBM cells discharging to 1.1484VIcell at 60*F Time (min) Kt Tt 1 0.761 1.07 2 0.870 1.07 NI 8 1.202 1.06 9 1.243 1.06 10 1.282 1.06 11 1.322 1.06 12 1.355 1.06 19 1.560 1.06 20 1.583 1.06 -

21 1.608 1.06 22 1.637 1.06 29 1.803 1.06 30 1.822 1.06 31 1.844 1.06 39 1.987 1.06 41 2.018 1.06 49 2.148 1.06 50 2.166 1.06 59 2.312 1.05 60 2.328 1.05 61 2.345 1.05 100 2.946 1.04 108 3.054 1.04 109 3.066 . 1.04 >

119 3.202 1.04 120 3.217 1.04 179 4.031 1.04 180 4.044 1.04 210 4.398 1.04 218 4.490 1.04 220 4.518 1.04 239 4.740 1.03 240 4.754 1.03

ML041050163

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