Text

Application to Revise Technical Specifications to Adopt Technical Specification Task Force (TSTF)-500, Revision 2, DC Electrical Rewrite-Update to TSTF-360.
	ML17275A069
Person / Time
Site:	Peach Bottom
Issue date:	09/29/2017
From:	Jim Barstow; Exelon Generation Co
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	Download: ML17275A069 (160)
	v • d • e

Exelon Generation 200 Exelon Way Kennett Square. P.A. 19348 www.exeloncorp.com 10 CFR 50.90 September 29, 2017 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Peach Bottom Atomic Power Station, Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277 and 50-278

Subject:

Application to Revise Technical Specifications to Adopt Technical Specification Task Force (TSTF)-500, Revision 2, "DC Electrical Rewrite-Update to TSTF-360."

In accordance with 10 CFR 50.90, "Application for amendment of license, construction permit, or early site permit," Exelon Generation Company, LLC (EGC) requests an amendment to the Technical Specifications (TS) for Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3.

The proposed changes incorporate the NRG-approved TSTF-500, Revision 2, "DC Electrical Rewrite-Update to TSTF-360."

EGC has concluded that the proposed changes present no significant hazards consideration under the standards set forth in 10 CFR 50.92.

The proposed changes have been reviewed by the PBAPS Plant Operations Review Committee in accordance with the requirements of the EGC Quality Assurance Program.

This amendment request contains three regulatory commitments, described in Attachment 4.

Attachment 1 provides an evaluation of the proposed changes. Attachment 2 provides the existing TS pages marked up to show the proposed changes. Attachment 3 provides the existing TS Bases pages marked up to show the proposed changes (for information only).

Attachment 4 provides the Summary of Regulatory Commitments. Attachment 5 provides the List of Required Updated Final Safety Analysis Report (UFSAR) Descriptions.

Attachment 6 provides the PBAPS DC System Simplified Diagram. Attachment 7 provides the PBAPS 4 kV Emergency Bus System Cross Ties. Attachment 8 provides the Conceptual Alternate Battery Charger Diagram. Attachment 9 provides the newly proposed PBAPS Technical Requirements Manual Section 3.21 Markup that contains the Battery Monitoring and Maintenance Program. Enclosure 1 provides the letter from the battery manufacturer, Enersys, verifying the acceptability of using float current monitoring.

U.S. Nuclear Regulatory Commission Application to Revise TS to Adopt TSTF-500 Docket Nos. 50-277 and 50-278 September 29, 2017 Page2 EGC requests approval of the proposed amendment by September 29, 2018. Once approved, the amendments shall be implemented on a per unit basis, prior to the first subsequent unit refueling outage to avoid repeated battery service discharge testing.

In accordance with 10 CFR 50.91, "Notice for public comment; State consultation,"

paragraph (b), EGC is notifying the Commonwealth of Pennsylvania of this application for license amendment by transmitting a copy of this letter and its attachments to the designated State Official.

If you have any questions or require additional information, please contact Frank J. Mascitelli at (610) 765-5512.

I declare under penalty of perjury that the foregoing is true and correct. Executed on the 291h day of September 2017.

Respectfully, bU:-

James Barstow Director - Licensing and Regulatory Affairs Exelon Generation Company, LLC Attachments: 1. Evaluation of Proposed Changes

2. Markup of Technical Specifications Pages

3. Markup of Technical Specifications Bases Pages (For Information Only)

4. Summary of Regulatory Commitments

5. List of Required Updated Final Safety Analysis Report (UFSAR)

Descriptions

6. PBAPS DC System Simplified Diagram (Unit 2 only)

7. PBAPS 4 kV Emergency Bus System Cross Ties 8 Conceptual Alternate Battery Charger Diagram

9. PBAPS Technical Requirements Manual Section 3.21 Markup Enclosure 1: Letter from Jan G. Reber, Director of Assembly Engineering, Enersys to Dipen Patel, System Engineer, Peach Bottom Atomic Power Station, Re:

Stabilized Float Current for Enersys GN Batteries," dated March 31, 2017.

cc: USNRC Region I, Regional Administrator w/ attachments USNRC Senior Resident Inspector, PBAPS USNRC Project Manager, PBAPS R. R. Janati, Pennsylvania Bureau of Radiation Protection S. T. Gray, State of Maryland

ATTACHMENT 1 Evaluation of Proposed Changes Peach Bottom Atomic Power Station, Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278

Subject:

Application to Revise Technical Specifications to Adopt Technical Specification Task Force (TSTF)-500, Revision 2, "DC Electrical Rewrite-Update to TSTF-360."

1.0 DESCRIPTION

2.0 ASSESSMENT 2.1 Applicability of Published Safety Evaluation 2.2 Verification and Regulatory Commitments 2.3 Optional Changes and Variations

3.0 REGULATORY ANALYSIS

3.1 Applicable Regulatory Requirements/Criteria 3.2 No Significant Hazards Consideration 4.0 PRECEDENT

5.0 ENVIRONMENTAL CONSIDERATION

6.0 REFERENCES

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 1 of 12 Docket Nos. 50-277 and 50-278

1.0 DESCRIPTION

Exelon Generation Company, LLC (EGC), proposes changes to the Technical Specifications (TS), Appendix A of Renewed Facility Operating License Nos. DPR-44 and DPR-56 for Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3, respectively.

The proposed changes request new TS Actions for an inoperable battery, battery charger and alternate battery charger testing criteria for Limiting Condition for Operation (LCO) 3.8.4, "DC Sources-Operating," and LCO 3.8.5, "DC Sources-Shutdown." The proposed changes also include the relocation of a number of Surveillance Requirements (SRs) in TS 3.8.4 that perform preventive maintenance on the safety related batteries to a licensee controlled program. It is proposed that LCO 3.8.6, "Battery Parameters," be modified by relocating Table 3.8.6-1, "Battery Cell Parameter Requirements," to a licensee-controlled program, and that specific actions with associated Completion Times for out-of-limits conditions for battery cell voltage, electrolyte level, and electrolyte temperature be added to TS 3.8.6. In addition, specific SRs are being proposed for verification of these parameters.

A new program is being proposed for TS Section 5.5, Programs and Manuals, of the Administrative Controls for the maintenance and monitoring of station batteries. The items proposed to be relocated will be contained within this new program, TS 5.5.15, titled "Battery Monitoring and Maintenance Program."

The proposed changes provide new Actions for an inoperable battery, battery charger, and alternate battery charger testing criteria. The longer Completion Time for an inoperable battery charger will allow additional time for maintenance and testing. In addition, a number of Surveillance Requirements are relocated to licensee control. Monitoring of battery cell parameter requirements and performance of battery maintenance activities are relocated to a licensee-controlled program, the PBAPS Technical Requirements Manual (TRM). The TS requirements are revised from requirements on battery cells to requirements on the battery.

This focuses the requirements on the assumed safety function of the battery.

These changes are consistent with the U.S. Nuclear Regulatory Commission (NRC)-approved Technical Specifications Task Force (TSTF) Traveler TSTF-500, Revision 2 (Reference 1). The availability of this TS improvement was announced in the Federal Register on September 1, 2011 (76 FR 54510).

In addition, a review of the existing PBAPS DC System Battery Capacity Analysis (Reference 3) and the preparation of three new Technical Evaluations (References 2, 4, 6) were completed to support station specific analyses required to adopt TSTF-500, Revision 2.

2.0 ASSESSMENT 2.1 Applicability of Published Safety Evaluation EGC has reviewed the model safety evaluation referenced in the Federal Register Notice of Availability published on September 1, 2011 (76 FR 54510). EGC has concluded that the justifications presented in TSTF-500 Revision 2 and the safety evaluation prepared by the NRC staff are applicable to PBAPS, Units 2 and 3, and justify this amendment for the incorporation of the changes to the PBAPS TS.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 2 of 12 Docket Nos. 50-277 and 50-278 The PBAPS DC System is very similar to the system described in TSTF-500 with respect to its ability to meet the duty cycle assumed in the accident analyses and with its operations in the float and equalize modes. Minor differences between the systems are noted in Section 2.3 below. The following section contains a brief description of the PBAPS DC System.

PBAPS DC System The 125/250 VDC System provides a source of reliable, uninterruptible 125/250 VDC power and 125 VDC control and instrument power to Class 1E and non-Class 1E loads during normal plant operating conditions and for safe shutdown of the plant following the initiation of any plant design basis event or accident as identified in the PBAPS Updated Final Safety Analysis report (UFSAR). , DC System Simplified Diagram (for Unit 2) is provided to facilitate the following description (Unit 3 is similar). There are two independent safety-related 125/250 V, 3-wire, DC systems (Subdivisions I and II) per unit. Each system is comprised of two 125 V batteries, each with its own battery charger panel consisting of two 100% chargers. Within the charger panel, one battery charger is in service and the other charger remains in standby and can be manually transferred, usually within a half hour, should the operating battery charger become inoperable.

There are a total of four safety-related 125/250 V batteries in the station, two for Unit 2 and two for Unit 3. Each safety-related 125/250 V battery is in a separate ventilated battery room. The two batteries for each unit are redundant. Loads are diversified between these systems so that each system serves loads which are identical and redundant, which are different but redundant to plant safety, or which back up AC equipment.

Power required for the larger loads, such as DC motor driven pumps and valves, is supplied at 250 V from the two 125 V sources of each system connected in series, and distributed through 250 voe motor control centers.

Power for all DC control functions, that is required for the control of the 13 kV and 4 kV circuit breakers, control relays, and annunciators, and power for exit lighting, is supplied at 125 V from each of the two 125 V sources of each system and distributed through 125 VDC power distribution panels.

Each safety related 125 V battery is of the lead-calcium type and consists of 58 shock absorbent, clear plastic cells, Enersys Model GN-23. The battery is rated at 1,712 amp-hours at the 8-hour rate (terminal voltage of 1.81 Vpc). The chargers are full wave, silicon controlled rectifiers. The housings are freestanding, NEMA Type I and are ventilated. The safety-related chargers are suitable for float charging the lead-calcium battery at 2.25 V per cell, and supplying an equalizing charge at 2.33 V per cell. The safety-related chargers operate from 480 V, 3-phase, 60 Hz sources supplied from separate 480 V motor control centers. Each of these motor control centers is connected to an independent emergency AC bus. The chargers for three Unit 2 and three Unit 3 batteries can be supplied from the other unit's emergency AC buses via manual transfer switches.

Charger voltage is maintained at(+/-) 1% from Oto 100 percent of charger rating with a supply voltage variation of(+/-) 10%. The chargers are in compliance with all applicable NEC, NEMA, and ANSI standards.

The 125 V chargers are capable of carrying the normal DC system load and, at the same time, supplying charging current to keep the batteries in a fully charged condition.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 3 of 12 Docket Nos. 50-277 and 50-278 In regards to PBAPS's specific parameters, the following values are listed below:

Battery full charge (100%) voltage is 130.5 V.

Battery full charge float voltage per cell is 2.25 VPC (volts per cell)

TS minimum established float voltage (MEFV) is 123.5 V (battery is inoperable below this voltage).

Battery cell voltage at minimum established float voltage is 2.13 VPC.

Battery Charger float current is 2 amps, representing 98% charged battery (proposed TS float value).

Battery Charger float current at 1 amp, represents 99% charged battery.

Alternate Battery Chargers Adoption of TSTF-500, Revision 2, will extend the Completion Time for an inoperable battery charger from the existing two hours to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months , provided that battery terminal voltage is restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , and battery float current is verified to be less than or equal to 2 amps once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

In order to maintain the battery voltage above a minimum threshold while the required battery charger is inoperable, an alternate battery charger is required. Given that the DC bus remains energized, that the battery discharge is terminated based on restoration of the battery terminal voltage, and that the battery is fully charged based on battery float current, there is reasonable basis for extending the restoration time for an inoperable battery charger beyond the existing two hour Completion Time to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months . The primary justification for the extended battery charger completion time is based on the availability of an alternate battery charger that is appropriately sized to perform the design function of the charger that becomes inoperable.

PBAPS will provide two 200 amp permanently installed (one per unit) non safety-related alternate battery chargers. The design of providing an alternate battery charger for each unit will ensure it can be placed in service within two hours, assuring that the discharging battery remains above its minimum TS MEFV, assuring operability of the battery. Use of alternate battery chargers has been established in similar licensee submittals. See Section 4, Precedent, below.

Technical Evaluation 619878, "Charger Sizing for PBAPS TSTF-500 LAR" (Reference 2) was prepared to properly size the alternate battery chargers and concluded:

1. A 200 amp rated non-safety related battery charger is acceptable for use as an alternate battery charger for the 1E station battery chargers.

2. A 200 amp rated battery charger will be able to recharge the battery to 95% capacity within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months after a 2-hour discharge under normal DC loading.

3. The alternate battery charger float and equalize voltages will be set to the same as the currently installed class 1E battery chargers.

4. Hydrogen generation is not expected to be a concern as the alternate battery charger is rated the same as the existing 1E battery chargers.

Attachment 8 provides a simplified single line diagram that illustrates the conceptual Alternate Battery Charger configuration when connected to the existing safety related battery chargers.

The newly installed fuse boxes and transfer switches, along with operating procedures to connect the alternate battery chargers will assure proper separation between safety and non-safety related systems and that the worst case battery discharge period will be limited to within two hours.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 4 of 12 Docket Nos. 50-277 and 50-278 Technical Evaluation 620526, "Battery Discharge Tech Eval," (Reference 4) was prepared to provide justification that after a 2-hour battery discharge under normal plant loading conditions, the battery will remain above 80% capacity (operable). The Technical Evaluation concluded:

1. A worst case 2-hour discharge under normal plant loading conditions results in less than 5% capacity removed from the battery, assuring the battery capacity will be greater than 80%.

2. When the alternate battery charger is connected and the battery terminal voltage is above the MEFV, the battery is able to be declared operable.

Applicable PBAPS TS sections The following PBAPS TS sections are affected by the proposed changes:

3.8.4 DC Sources - Operating 3.8.5 DC Sources- Shutdown 3.8.6 Battery Cell Parameters 5.5 Programs and Manuals 2.2 Verification and Regulatory Commitments PBAPS has reviewed the model safety evaluation referenced in the Federal Register Notice of Availability published on September 1, 2011 (76 FR 54510). This review included a review of the NRC staff's evaluation, as well as the supporting information provided to support TSTF-500.

As described in the subsequent paragraphs, PBAPS has concluded that the justifications presented in the TSTF-500 proposal and the model safety evaluation prepared by the NRC staff are applicable to PBAPS and justify this amendment for the incorporation of the changes to the PBAPSTS.

As described in Section 4.7.1, "Verifications," in TSTF-500, PBAPS provides the following verifications:

1. In Enclosure 1, PBAPS has provided a letter from the battery manufacturer, Enersys, of the batteries used at PBAPS verifying the acceptability of using float current monitoring instead of specific gravity monitoring as a reliable and accurate indication of the state-of-charge of the battery and that this will hold true over the life of the battery. Per Enersys, the battery manufacturer, it can be reasonably assumed that when the float current is less than or equal to a 2-amp threshold, the model GN-23 station batteries will have achieved a nominal returned capacity of at least 98 percent. At a float current of less than or equal to 1-amp, the GN-23 batteries are expected to have achieved a nominal returned capacity of at least 99 percent. These values are expected to be valid for the service life of the batteries.

2. PBAPS verifies that battery room temperature is routinely monitored such that a room temperature excursion could reasonably expect to be detected and corrected prior to the average battery electrolyte temperature dropping below the minimum electrolyte temperature.

There is control room annunciation if a battery room temperature is low (65°F) or high (100°F). In addition, if the alarm is in the 2(3)A or 2(3)C Battery rooms the battery pilot cell temperature is verified to be maintained greater than or equal to 40°F. As part of the commitment to maintain 5% design margin, the battery room temperature will be maintained above 50°F. Battery pilot cell temperature will be verified to be maintained greater than or equal to 50°F after TSTF-500 Rev 2 is implemented.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 5 of 12 Docket Nos. 50-277 and 50-278

3. PBAPS verifies that the equipment that will be used to monitor float current under SR 3.8.6.1 will have the necessary accuracy and capability to measure electrical currents in the expected range. The float current is a measured value per procedure and typically uses a Fluke model 189 multi-meter, which has an accuracy of 0.5%.

4. PBAPS will not be requesting a Completion Time greater than 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months for an inoperable battery charger.

5. PBAPS will not be requesting a Completion Time longer than 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for an inoperable battery or greater than 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months for an inoperable DC subdivision for other reasons than an inoperable battery or inoperable battery charger.

6. PBAPS verifies that there is an appropriate basis for the relocated inter-cell connection resistance limit of 40 micro-ohms, which is being relocated to the Battery Monitoring and Maintenance Program.

IEEE 450-2002 Annex D.2 identifies methods to establish inter-cell connection resistances. Method D.2, Connection resistance, states that the design maximum for the connection resistance may be calculated using manufacturer's connection voltage drop criterion. The maximum connection resistance can be calculated using V=IR. The current (I) should be equal to a current that bounds the continuous current in the duty cycle. Typically the performance test current rate bounds the continuous current in the duty cycle. Under these conditions, V = the manufacturer's connection voltage drop and I = the performance test rate.

The modified battery discharge performance tests identify the continuous duty current as 490/K1 where K1 is the temperature correction factor. The acceptance criterion for cell temperature is 40-90°F. The correction factor for 90° is 0.940. This yields a continuous duty of 521 A.

Engineering Work Request (EWR) P-51694 (Reference 5) calculated the inter-cell connection resistance using the method described above. Per the EWR a 30mV drop across the connections is acceptable. The EWR used 555 A as the continuous battery duty current. This results in a maximum limit of 54 micro-ohms. As such, the 40 micro-ohm limit is acceptable. The proposed increase in acceptance criteria to 50-90°F will have a negligible effect on the 40 micro-ohm limit.

7. PBAPS has confirmed for SR 3.8.4.7 that the modified performance discharge test completely encompasses the load profile of the battery service test and that it adequately confirms the intent of the service test to verify the battery capacity to supply the design basis load profile.

As described in Section 4.7.2, "Commitments," in TSTF-500, PBAPS makes the following regulatory commitments:

1. EGC commits to include in a licensee-controlled program that is controlled under 10 CFR 50.59 a requirement to maintain a 5% design margin for the batteries. Enersys (PBAPS battery manufacturer) has provided a letter which verifies that a 2 amp float current value is an indication that the battery is 98% charged. Using a 5% design margin is thus conservative in this aspect.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 6 of 12 Docket Nos. 50-277 and 50-278 Technical Evaluation 619923, "Battery Size 5% Design Margin" (Reference 6) evaluated incorporating a 5% design margin, which includes raising the minimum battery cell electrolyte temperature from 40°F to 50°F. The 5% design margin is used to ensure that with a battery float current of 2 amps or less, the battery will have the capacity to support design basis accident DC loads. PBAPS has verified via the battery manufacturer (Enersys) that a battery float current of 2 amps or less is indicative of a 98% battery charge. PBAPS will conservatively use a 5% design margin in the 1E battery sizing analysis. Enersys reviewed the battery charging curves, Tafel curves, and service testing data and established empirical relationships between each individual cell's float current based on the Tafel curves and the approximate capacity returned to the battery. The trigger point was 2 amps because that was the bracketed quantity in the TS, but the battery vendor also estimated the returned capacity at other float current values. Per Enersys, the culmination of that research, which they have stated is proprietary, has remained consistent with respect to returned capacity, and was the basis for the values provided in Enclosure 1.

To support maintaining the required 5% design margin, the minimum allowed battery electrolyte temperature will be changed from 40°F to 50°F. Historical battery room temperature records support this change. The current battery room low temperature control room alarm setpoint is 65°F. Additionally, battery room temperatures are monitored on a periodic basis and plant procedures provide operators with directions to take action upon receipt of high or low temperature alarms.

Technical Evaluation 619923 concluded:

1. It is acceptable for PBAPS to incorporate TSTF-500 and use float current as a method of monitoring for state of charge of the batteries and return to service limit.

2. Use of 5% design margin and 50°F minimum electrolyte temperature is acceptable for the Peach Bottom 1E Batteries.

3. The 5% design margin which will be incorporated into the PBAPS battery sizing analysis and the Enersys letter on float current (Enclosure 1) ensures that when the Peach Bottom 1E batteries' float current is 2 amps or less, the batteries will be greater than 100% capacity to support design bases accident DC loads.

4. With the incorporation of TSTF-500, the Enersys model GN-23 battery cells are of adequate size to support the design basis DC load profile.

2. EGC commits that the required licensee-controlled program described in TS Section 5.5, "Programs and Manuals," and titled "Battery Monitoring and Maintenance Program," will require verification of the selection of the pilot cell when performing SR 3.8.6.5. The existing TS Table 3.8.6-1 Categories A, B, values (electrolyte, level, float voltage, and specific gravity) that will be relocated to proposed TS 5.5.15, will continue to be controlled at their current levels in the Battery Monitoring and Maintenance Program and that action to restore deficient values will be implemented in accordance with the EGC Corrective Action Program. The Battery Monitoring and Maintenance Program will reside as new section 3.21 in the existing PBAPS Technical Requirements Manual (TAM). A draft markup of the newly proposed TAM has been provided in Attachment 9.

3. EGC commits to revise the PBAPS Updated Final Safety Analysis Report in accordance with Attachment 5, List of Required Updated Final Safety Analysis Report (UFSAR) Descriptions.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 7 of 12 Docket Nos. 50-277 and 50-278 2.3 Optional Changes and Variations PBAPS is proposing the following variations from the TS changes described in the TSTF-500, Revision 2, or the applicable parts of the NRC staff's model safety evaluation dated September 1, 2011.

PBAPS TS utilize different numberings than the improved Standard Technical Specifications on which TSTF-500 was based. The different numberings arise from the additional LCOs associated with the interdependence of Unit 2 and Unit 3 DC systems for certain loads. In addition, TSTF-500 deletes certain Surveillances and renumbers the subsequent Surveillances.

PBAPS has chosen to retain the deleted Surveillance numbers, mark them "DELETED," and to not renumber the subsequent Surveillances. PBAPS has implemented TSTF 425, "Relocate Surveillance Frequencies to Licensee Control," via License Amendment Nos. 278 and 281 (Reference 7) for Units 2 and 3, respectively, and will maintain the existing proposed SR frequencies in accordance with the Surveillance Frequency Control Program's current frequencies. New proposed SR frequencies will be consistent with the TSTF-500 proposed frequencies and the TS Frequencies column will state "In accordance with the Surveillance Frequency Control Program." These differences are administrative in nature and do not affect the applicability of TSTF-500 to the PBAPS TS.

The PBAPS DC system design differs from the design assumed for the standard plant described in the Standard Technical Specifications Bases (STS) and TSTF-500 Rev 2, in two notable ways: 1) DC system inter-unit crossties, and 2) installed spare battery chargers in standby condition.

The DC system inter-unit crossties are related to the 4 KV Emergency Buses and Emergency Diesel Generators (EDGs). Note that PBAPS does not have a separate EOG DC battery subsystem. The EDGs receive their DC control power from the 125/250 DC System. illustrates an example of this inter-unit dependence in regards to the EDGs. Each unit is provided with four 4 kV emergency buses for safety related equipment. A total of four EDGs provide AC power to each unit's four 4 kV emergency buses. The DC control power (which provides control power for the 4 kV load circuit breakers and the feeder breakers to the 4 kV emergency bus) for two of the four 4 kV emergency buses, as well as control power for two of the diesel generators, is provided by the Unit 3 DC electrical power subsystems. Therefore, the Unit 3 DC electrical power subsystems needed to support required Unit 2 components are also required to be OPERABLE. The Unit 3 DC electrical power subsystem OPERABILITY requirements are the same as those required for a Unit 2 DC electrical power subsystem. In addition, battery chargers (Unit 2 and Unit 3) can be powered from the opposite unit's AC source (as described in the Background section of the Bases for LCO 3.8.4, "DC Sources - Operating"), and be considered OPERABLE for the purpose of meeting this LCO.

Accordingly, PBAPS TS differ from the STS which were the basis for TSTF-500 due to the inter-unit crosstie design. The Unit 2 DC System contains a TS LCO Action (3.8.4.) for the Unit 3 DC system, and the Unit 3 DC System contains a TS LCO Action (3.8.4) for the Unit 2 DC System.

These LCOs will remain unaffected by the proposed changes to adopt TSTF-500 Rev 2.

In regards to the installed spare battery chargers in standby condition, within each battery charger panel there is an operating battery charger and an identical installed standby battery charger that can be manually transferred if the operating battery charger becomes unavailable.

For the purpose of adopting TSTF-500 Rev 2, the 72-hour inoperable battery charger LCO will be used when both the operating and standby battery chargers both become inoperable. The

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 8 of 12 Docket Nos. 50-277 and 50-278 published Safety Evaluation continues to be applicable to the plant-specific design. The two differences (DC system inter-unit crossties and installed standby battery chargers) do not affect the proposed actions for battery charger inoperability nor affect the proposed relocated preventative maintenance surveillances, certain operating limits, and actions to a newly-created licensee-controlled Battery Monitoring and Maintenance Program.

3.0 REGULATORY ANALYSIS

3.1 Applicable Regulatory Requirements I Criteria The following NRC requirements and guidance document are applicable to the review of the proposed change.

The proposed changes have been evaluated to determine whether applicable regulations and requirements continue to be met. EGC has determined that the proposed changes do not require any exemptions or relief from the applicable regulatory requirements. Note that PBAPS was designed and constructed taking into consideration the general design criteria for nuclear power plant construction permits as listed in the proposed AEC General Design Criteria, dated July 1967. The following current applicable regulations and regulatory requirements were reviewed in making this determination:

Title 10 of the Code of Federal Regulations (10 CFR) Part 50 Appendix A, General Design Criterion (GDC) 17, "Electric power systems," requires, in part, that nuclear power plants have onsite and offsite electric power systems to permit the functioning of structures, systems, and components (SSCs) that are important to safety. The onsite system is required to have sufficient independence, redundancy, and testability to perform its safety function, assuming a single failure. The offsite power system is required to be supplied by two physically independent circuits that are designed and located so as to minimize, to the extent practical, the likelihood of their simultaneous failure under operating and postulated accident and environmental conditions. In addition, this criterion requires provisions to minimize the probability of losing electric power from the remaining electric power supplies as a result of loss of power from the unit, the offsite transmission network, or the onsite power supplies.

GDC 18, "Inspection and testing of electric power systems," requires that electric power systems that are important to safety must be designed to permit appropriate periodic inspection and testing.

10 CFR 50.36, "Technical specifications," requires a licensee's TSs to establish limiting conditions for operation (LCOs), which include completion times (CTs) for equipment that is required for safe operation of the facility.

10 CFR 50.63, "Loss of all alternating current power," requires that each light-water cooled nuclear power plant licensed to operate must be able to withstand for a specified duration and recover from a station blackout (SBO).

10 CFR 50.65, "Requirements for monitoring the effectiveness of maintenance at nuclear power plants," requires that preventive maintenance activities must not reduce the overall availability of the SSCs.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 9 of 12 Docket Nos. 50-277 and 50-278 Regulatory Guide (RG) 1.75, Revision 3, "Criteria for Independence of Electrical Safety Systems," February 2005, provides guidance with respect to the physical independence requirements of the circuits and electrical equipment that comprise or are associated with safety related systems (ML043630448).

RG 1.129, Revision 2, "Maintenance, Testing, and Replacement of Vented Lead-Acid Storage Batteries for Nuclear Power Plants," February 2007, provides guidance with respect to the maintenance, testing, and replacement of vented lead-acid storage batteries in nuclear power plants. This RG endorses, in part, the Institute of Electrical and Electronics Engineers (IEEE)

Standard 450-2002, "IEEE Recommended Practice for Maintenance, Testing and Replacement of Vented Lead-Acid Batteries for Stationary Applications" (ML063490110).

TSTF-500, Revision 2, "DC Electrical Rewrite - Update to TSTF-360," dated September 22, 2009 (ML092670242).

TSTF-425, Revision 3, "Relocate Surveillance Frequencies to Licensee Control - RITSTF Initiative Sb," dated March 18, 2009 (ML090850642).

Model application and Safety Evaluation for plant specific adoption of TSTF-500, Revision 2 (ML111751792), as published for availability in the Federal Register on September 1, 2011 (76 FR 54510).

3.2 No Significant Hazards Consideration Exelon Generation Company, LLC (EGC), proposes changes to the Technical Specifications (TS), Appendix A of Renewed Facility Operating License Nos. DPR-44 and DPR-56 for Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3, respectively.

EGC requests adoption of Technical Specifications Task Force {TSTF)-500, Revision 2, "DC Electrical Rewrite-Update to TSTF-360," which is an approved change to the Standard Technical Specifications (STS), into the PBAPS TS. The proposed changes request new actions for an inoperable battery charger and alternate battery charger testing criteria for Limiting Condition for Operation (LCO) 3.8.4, "DC Sources-Operating," and LCO 3.8.5, "DC Sources-Shutdown." The proposed changes also include the relocation of a number of Surveillance Requirements (SRs) in TS 3.8.4 that perform preventive maintenance on the safety related batteries to a licensee controlled program. It is proposed that LCO 3.8.6, "Battery Parameters," be modified by relocating Table 3.8.6-1, "Battery Cell Parameter Requirements,"

to a licensee-controlled program, and that specific actions with associated Completion Times for out-of-limits conditions for battery cell voltage, electrolyte level, and electrolyte temperature be added to TS 3.8.6. In addition, specific SRs are being proposed for verification of these parameters.

A new program is being proposed for TS Section 5.5, Programs and Manuals, for the maintenance and monitoring of station batteries. The items proposed to be relocated will be contained within this new program, TS 5.5.15, titled the "Battery Monitoring and Maintenance Program."

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 10 of 12 Docket Nos. 50-277 and 50-278 EGC has reviewed the proposed no significant hazards consideration determination (NSHCD) published in the Federal Register (76 FR 54510) as part of the NRC approved TSTF-500, Rev

2. EGC has concluded that the proposed NSHCD presented in the Federal Register notice is applicable to PBAPS and is hereby incorporated by reference to satisfy the requirements of 10CFR 50.91 (a):

1. Does the proposed change involve a significant increase in the probability or consequences of an accident previously evaluated?

Response: No.

The proposed change restructures the TS for the direct current (DC) electrical power system.

The proposed changes add actions to specifically address battery charger inoperability. The DC electrical power system, including associated battery chargers, is not an initiator of any accident sequence analyzed in the Updated Final Safety Analysis Report (UFSAR). Operation in accordance with the proposed TS ensures that the DC electrical power system is capable of performing its function as described in the UFSAR. Therefore, the mitigative functions supported by the DC electrical power system will continue to provide the protection assumed by the analysis, and the probability of previously analyzed accidents will not increase by implementing these changes.

The relocation of preventive maintenance surveillances, and certain operating limits and actions, to a newly created licensee-controlled Battery Monitoring and Maintenance Program will not challenge the ability of the DC electrical power system to perform its design function.

Appropriate monitoring and maintenance, consistent with industry standards, will continue to be performed. In addition, the DC electrical power system is within the scope of 10 CFR 50.65, "Requirements for monitoring the effectiveness of maintenance at nuclear power plants," which will ensure the control of maintenance activities associated with the DC electrical power system.

The integrity of fission product barriers, plant configuration, and operating procedures as described in the UFSAR will not be affected by the proposed changes. Therefore, the consequences of previously analyzed accidents will not increase by implementing these changes.

Therefore, the proposed change does not involve a significant increase in the probability or consequences of an accident previously evaluated.

2. Does the proposed change create the possibility of a new or different kind of accident from any accident previously evaluated?

Response: No.

The proposed change involves restructuring the TS for the DC electrical power system. The DC electrical power system, including associated battery chargers, is not an initiator to any accident sequence analyzed in the UFSAR. Rather, the DC electrical power system is used to supply equipment used to mitigate an accident.

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

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 11 of 12 Docket Nos. 50-277 and 50-278

3. Does the proposed change involve a significant reduction in a margin of safety?

Response: No.

The margin of safety is established through equipment design, operating parameters, and the setpoints at which automatic actions are initiated. The proposed changes will not adversely affect operation of plant equipment. These changes will not result in a change to the setpoints at which protective actions are initiated. Sufficient DC capacity to support operation of mitigation equipment is ensured. The changes associated with the new battery maintenance and monitoring program will ensure that the station batteries are maintained in a highly reliable manner. The equipment fed by the DC electrical sources will continue to provide adequate power to safety related loads in accordance with analysis assumptions.

Therefore, the proposed change does not involve a significant reduction in a margin of safety.

Based on the above, EGC concludes that the proposed amendment presents no significant hazards consideration under the standards set forth in 10 CFR 50.92(c), and, accordingly, a finding of "no significant hazards consideration" is justified.

3.3 Conclusions In conclusion, based on the considerations discussed above, (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commission's regulations, and (3) the approval of the proposed change will not be inimical to the common defense and security or to the health and safety of the public.

4.0 PRECEDENT The following industry precedent is applicable to the PBAPS license amendment request:

Palo Verde Nuclear Generating Station, Units 1, 2, and 3 - Issuance of Amendments Re:

License Amendment Request for Adoption of Technical Specifications Task Force (TSTF}

Traveler TSTF-500, Revision 2, DC Electrical Rewrite - Update to TSTF-360 (TAC NOS.

MF0450, MF0451, and MF0452}, dated June 25, 2014.

Arkansas Nuclear One, Unit 1 - Issuance of Amendment Re: Adoption of Technical Specifications Task Force (TSTF} Change Traveler TSTF-500, Revision 2, DC Electrical Rewrite - Update to TSTF-360 (TAC NO. MF0596), dated June 25, 2014.

Edwin I. Hatch Nuclear Plant - Units 1 and 2, License Amendment Request for Adoption of Technical Specifications Task Force (TSTF) Traveler TSTF-500, Revision 2, "DC Electrical Rewrite - Update to TSTF-360," dated August 11, 2015.

Evaluation of Proposed Changes Attachment 1 Application to Revise TS to Adopt TSTF-500 Page 12 of 12 Docket Nos. 50-277 and 50-278

5.0 ENVIRONMENTAL CONSIDERATION

A review has determined that the proposed amendment would change a requirement with respect to installation or use of a facility component located within the restricted area, as defined in 10 CFR 20, or would change an inspection or surveillance requirement. However, the proposed amendment does not involve (i) a significant hazards consideration, (ii) a significant change in the types or significant increase in the amounts of any effluent that may be released offsite, or (iii) a significant increase in individual or cumulative occupational radiation exposure.

Accordingly, the proposed amendment meets the eligibility criterion for categorical exclusion set forth in 10 CFR 51.22(c)(9). Therefore, pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment need be prepared in connection with the proposed amendment.

6.0 REFERENCES

1. Federal Register (76 FR 54510): Notice of Availability of Proposed Models for Plant Specific Adoption of technical Specifications Task Force Traveler TSTF-500, Revision 2, "DC Electrical Rewrite-Update to TSTF-360," dated September 1, 2011.

2. PBAPS Technical Evaluation 619878, "Charger Sizing for PBAPS TSTF-500 LAA," dated August 1, 2017.

3. PBAPS PE-0017 Calculation, "Perform 125/250 V DC Class 1E Battery Capacity Analysis and Distribution System Voltage Analysis," Rev 13, dated August 21, 2015.

4. Technical Evaluation 620526, "Battery Discharge Tech Eval," dated August 1, 2017.

5. Engineering Work Request (EWR)-P-51694, "Inter-cell Connection Resistance," dated May 9, 1990.

6. PBAPS Technical Evaluation 619923, "Battery Size 5% Design Margin Tech Eval," dated July31, 2017.

7. License Amendment Nos. 278 and 281: Peach Bottom Atomic Power Station Units 2 and 3-lssuance of Amendments Re: Adoption of TSTF Traveler 425, Revision 3, Relocate Surveillance Frequencies to Licensee Control (TAC NOS. ME2184 and ME2185), dated August 27, 2010.

ATTACHMENT2 Markup of Technical Specifications Pages Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278 Revised Technical Specifications Pages Unit 2 TS Pages 3.8-28 3.8-32 3.8-38a*

3.8-29 3.8-34 3.8-39 3.8-29a* 3.8-35 3.8-39a*

3.8-30 3.8-36 3.8-40 3.8-31 3.8-37 5.0-18b*

3.8-31a* 3.8-38 5.0-18c*

Unit 3 TS Pages 3.8-28 3.8-32 3.8-38a*

3.8-29 3.8-34 3.8-39 3.8-29a* 3.8-35 3.8-39a*

3.8-30 3.8-36 3.8-40 3.8-31 3.8-37 5.0-18b*

3.8-31 a* 3.8-38 5.0-18c*

Anticipated new pages, subject to change when clean pages are submitted and repagination is completed.

DC Sources - Operating 3.8.4 3.8 ELECTRICAL POWER SYSTEMS

3. 8. 4 DC Sources- Operating LCO 3.8.4 The following DC electrical power subsystems shall be OPERABLE:

a. Unit 2 Division I and Division II DC electrical power subsystems; and

b. Unit 3 Division I and Division II DC electrical power subsystems.

APPLICABILITY: MODES 1, 2, and 3.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One Unit 3 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO due to performance of 3.8.7, "Distribution SR 3.8.4.7 or Systems - Operating, " when SR 3.8 .4-;-8 . 6.6 Condition A results in de-energization of a Unit 2 4 kV emergency bus or de-energization of a Unit 3 DC bus.

A.l Restore Unit 3 DC 7 days electrical power subsystem to OPERABLE status.

(continued)

PBAPS UNIT 2 3.8-28 Amendment No.

DC Sources -Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One Unit 3 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO for reasons other than 3.8.7, "Distribution Condition A. Systems - Operating," when Condition B results in de-energization of a Unit 2 4 kV emergency bus.

B.1 Restore Unit 3 DC 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months electrical power subsystem to OPERABLE status.

h One battery charger on C.1 Restore battery 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months one subsystem terminal voltage to inogerable. greater than or egual to the minimum established float voltage.

AND C.2 Verify battery float Once ger 12 current < 2 amgs. hours AND

c. 3 Restore battery 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months charger to OPERABLE status.

Q_,_ One battery on one D.l Restore battery to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months subsystem inogerable. OPERABLE status.

(continued)

PBAPS UNIT 2 3.8-29 Amendment No.

DC Sources - Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME E.E_. One Unit 2 DC E.E_ .1 Restore Unit 2 DC 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power electrical power subs~stem inoperable. subsystem to OPERABLE For reasons other than status.

conditions C, or D.

9£ . Required Action and 9£ .1 Be in MODE 3. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Associated Completion Time of Condition A, AND B, C, D, or E not met.

F.2 Be in MODE 4. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months

~. Two or more inoperable ~ .1 Enter LCO 3.0.3. Immediately DC electrical power subsystems.

PBAPS UNIT 2 3.8-29a Amendment No.

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS

NOTE------------------------------- - -----

SR 3.8.4.1 through SR 3.8.4.8 are applicable only to the Unit 2 DC electrical power subsystems. SR 3.8.4.9 is applicable only to the Unit 3 DC electrical power subsystems.

SURVEILLANCE FREQUENCY SR 3.8.4.1 Verify battery terminal voltage is In accordance

~ 123.5 Von float cnarge. greater than or with the equal to the minimum established float Surveillance voltage. Frequency Control Program.

SR 3.8.4.2 DELETED Verify no visible corrosion at In accordance battery terminals and connectors. vwi th the Surveillance Frequefley-Eoflt rol Verif) battery connection resistance is Program .

..::: 40 [ 6 onm57 SR 3.8.4.3 DELETED Verify batter) cells, cell plates, In accordance and racks show flo visual ifldication of with the ph)sical damage or abnormal deterioratiofl Su rvei 11 ance that could potential l) degrade batter) Frequency performance. Control Program .

(continued)

PBAPS UNIT 2 3.8-30 Amendment No.

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.4 DELETED Remove ~isible corrosion and verify In accordance battery cell to cell and terminal ~dth t~

connections are coated ~ith anti corrosion Surveillance material. Frequency Control Program .

SR 3.8.4.5 DELETED Verify batter) connection In accordance resistance is ~~ with the-Survei llanee Frequency Control Program.

SR 3 . 8.4.6 Verify each required battery charger In accordance supplies ~ 200 amps at greater than or with the equal to 125 V for the minimum established Surveillance float voltage for ~ 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . Frequency Control Program.

Verify each battery charger can recharge the battery to the fully charged state within 20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months while supplying the largest combined demands of the various continuous steady state loads. after a battery discharge to the bounding design basis event discharge state.

(continued)

PBAPS UNIT 2 3.8-31 Amendment No.

DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.7 -------------------NOTES-------------------

1. SR 3.8 . 4.8 may be performed in lieu of the ser~ice test in SR 3.8.4.7 when SR 3.8.4.8 envelops the duty cycle of the battery. The modified performance discharge test in SR 3.8.6.6 may be performed in lieu of SR 3.8.4.7.

2. This Surveillance shall not be performed in MODE 1, 2, or 3.

However, credit may be taken for unplanned events that satisfy this SR.

Verify battery capacity is adequate to In accordance supply, and maintain in OPERABLE status, with the the required emergency loads for the design Surveillance duty cycle when subjected to a battery Frequency service test. Control Program.

(continued)

PBAPS UNIT 2 3.8-31a Amendment No.

DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.8 DELETED NOTE This Sur~eillance shall not be performed in MODE 1, 2, or 3. llou;ever, credit may be taken for unplanned events that satisf) tliis SR.

Verif) battery capacity is ~ 80% of the In accordance manufacturer's rating when subjected to a witli the performance discharge test or a modified Surveillance performance discharge test. Fre~uency Cont ml Program.

12 montlis vvhen batter) shows de9radation or has readied 85%

of expected fife ~d th capacity < 10096 of--

manufacturer's rating 24 months when battery has reached 85% of tne expected 1ife ~~i'tn capacity ~ 10096 o-f-manufacturer's firt-i-n!t (continued)

PBAPS UNIT 2 3.8-32 Amendment No.

DC Sources- Shutdown 3.8.5 3.8 ELECTRICAL POWER SYSTEMS

3. 8. 5 DC Sources - Shutdown LCO 3.8.5 The following DC electrical power subsystems shall be OPERABLE:

a. Unit 2 DC electrical power subsystems needed to support the DC electrical power distribution subsystem(s) required by LCO 3. 8. 8, "Distribution Systems - Shutdown";

and

b. Unit 3 DC electrical power subsystems needed to support the DC electrical power distribution subsystem(s) required by LCO 3. 8. 8, "Di stri buti on Systems - Shutdown."

APPLICABILITY: MODES 4 and 5, During movement of irradiated fuel assemblies in the secondary containment.

ACTIONS

NOTE-------------------------------------

LCO 3.0.3 is not applicable.

CONDITION REQUIRED ACTION COMPLETION TIME 8._,_ One battery charger on A.1 Restore battery 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months one subsystem terminal voltage to inoperable. greater than or equal to the minimum established float voltage.

The redundant subsystem battery and AND chargers OPERABLE.

Verify battery float Once per 12 current < 2 amps. hours Restore battery 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months charger to OPERABLE status.

(continued)

PBAPS UNIT 2 3.8-34 Amendment No.

DC Sources - Shutdown 3.8.5 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME A. (cont i nued)

Aa . One or more required Aa .1 Declare affected Immediately DC electrical power required feature (s) subsystems inoperable inoperable.

for reasons other than condition A. OR AB . 2.1 Suspend CORE Immediately ALTERATIONS.

Required actions and associated completion AND time of condition A not met.

Aa .2.2 Suspend movement of Immediately irradiated fuel assemblies in the secondary containment.

AND Aa .2.3 Initiate action to Immediately suspend operations with a potential for draining the reactor vessel.

AND Aa .2.4 Initiate action to Immediately restore required DC electrical power subsystems to OPERABLE status.

PBAPS UNIT 2 3.8-35 Amendment No.

DC Sources - Shutdown 3.8.5 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.5.1 -------------------NOTE------------------ --

The following SRs are not required to be performed: SR 3.8.4. r Q and SR .3.8.4 .a I.,_

For required Unit 2 DC electrical power In accordance subsystems, the following SRs are with 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 SR 3.8.5.2 -------------------NOTE--------------------

When Unit 3 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 3 SR 3.8.5.1 is applicable.

For required Unit 3 DC electrical power In accordance subsystems, the SRs of Unit 3 Specification with applicable 3.8.4 are applicable. SRs PBAPS UNIT 2 3.8-36 Amendment No.

Battery Cell Parameters 3.8.6 3.8 ELECTRICAL POWER SYSTEMS 3.8.6 Battery Eel+ Parameters LCO 3.8.6 Battery ee-l-=1-parameters for the station electrical power subsystem batteries shall be within the limits of-Ta:bl e 3 . a. 6 l.

APPLICABILITY: When associated DC electrical power subsystems are required to be OPERABLE.

ACTIONS

NOTE-------------------------------------

Separate Condition entry is allowed for each battery.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more batteries A.l Verify pilot cells ~ z hour

~vi tn one or more electrolyte level and battery cell float voltage meet parameter! not witnin Table 3.8.6 1 Category A or 6- Category E limits .

1 imi ts. One battery Perform SR 3.8.4.1 on one susbsystem with one or more batter y AND cells float voltage <

2.07. A.2 Verify battery cell 4 z hours parameters meet Table 3.8.6 1 ANS Category C limits.

Perform SR 3.8.6.1 Once per 7 days thereafter AND A.3 Restore battery cell 3-i-f.taY5 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months parameters to Category A and B limits of Tabl e 3 . a. 6 1.

Restore affected cell float voltage> 2.07

~

(continued)

PBAPS UNIT 2 3.8-37 Amendment No.

Battery Cell Parameters 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME

0. Reqtd r~d :A:eti on and B.1 Beel are assoeiated Immediately as sod ated Completion battery inoperable. 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Time of Condition A Perform SR 3.8.4.1.

net met . 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months AND OR B. 2 Restore battery float One or more batteries current to < 2 amgs.

wHt'l average el eetr-ol yte temperattt re of tt'le representati'll'e eel ls net *ni tt'li n l i mits .

OR One or more batteries wHn one or mor-e battery ee H parameters not Wi t hi Ii Category C 1 i mi t-s. One battery on one subs ystem with float current > 2 amgs.

- ---NOTE------- --- ------------ NOTE-------------

Reguired Action C.2 Reguired Actions C.1 and c. 2 shall be comgleted if are only agglicable if electrol yte level was electrolyte level was below below the to g of the tog of glates.

glates. -----------------------------

c. One battery on one C.1 Restore affected cell 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months subs ystem with one or electrol yte 1 evel to more cells electrol yte above the tOQ of Qlates.

level less than minimum established AND desi gn limits.

C.2 Verify no evidence of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months leakage.

AND

c. 3 Restore electrolyte 1 evel 31 days to greater than or egual to minimum established design 1 i mi ts.

(continued)

PBAPS UNIT 2 3.8-38 Amendment No.

Battery Parameters ACTIONS (continued )

CONDITION REQUIRED ACTION COMPLETION TIME Q_,_ One batter y with D.l Restore battery 12i 1ot 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 12il ot ce11 cell tem12erature to electrolyte greater tnan or egual tem ~ erature less than to minimum minimum esta6lis nea esta6lisnea design aesign limits. limits.

h One or more batteries E.l Restore battery 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months in reaun aant ~arameters for su6systems with -atteries in one 6attery ~arameters s¥stem to witnin not wit hin limits. limits.

L_ Reguired Action and F.l Declare associated Immediately associatea Com~letion 6attery ino12era6le.

Time of Conaition A, B, c, D or E not met.

OR One battery on one su6system wit n one or more 6attery cell s wit n f l oat vo l tage <

2. 07 v ana fl oat current > 2 am12s.

PBAPS UNIT 2 3.8-38a Amendment No.

Battery Cell Parameters 3.8.6 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.6.1 Verif) battery cell parameters meet Table 3.8.6 1 Category A limits.

- -- --- -- ---- -- -- --NOTE-- -- ----------------

Not required to be met when battery terminal voltage is l ess than the minimum establi shed f l oat vo l tage of SR 3.8.4.1.

Verify each battery float current is < 2 anps. In accordance with the Surveillance Frequency Control Program SR 3.8.6.2 Verify each battery cell meets In accordance Table 3.8.6 1 Category B limits. Verify with the each battery pilot cell float voltage is > Surveillance 2.07. Frequency Control Program.

Once ~1* i thin 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months after battery discharge

< 100 v Or1ce wi thi r1 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months after battery overcharge

> 145 v SR 3.8.6.3 ~e electrolyte temperature of- In accordance representati ve cells is ~ 40 ' F. Verify with the each battery connected cell electrolyte Surveillance level is greater than or equal to minimum Frequency established design limits. Control Program.

(continued)

PBAPS UNIT 2 3.8-39 Amendment No.

Battery Parameters SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.6.4 Verify each battery pilot cell temperature In accordance is greater than or eQual to minimum with the established design limits. Su rvei 11 ance Freguencp Controlrogram SR 3.8.6.5 Veriff each battery cell float voltage is In accordance

> 2.0 v. with the Surveillance Frequencr; Controlrogram SR 3.8.6.6 ------------------NOTE------------------- -

Thi s Surveillance shall not be performed in MODE 1. 2. 3. However credit may be taken for unplanned events that satisfy t his SR.

Verify battery capacitv is > 80% of the In accordance manufacturer's rating when subjected to a with the performance discharge test or a modified Surveillance performance discharge test. Frequencr; Controlrogram AND 12 months when battery shows degradation or has reached 85%

of the expected life with capacit y < 100%

of manufacturer's rating AND 24 months when battera has reache 85% of the exl?ected life With capacity > 100%

of manufacturer's rating PBAPS UNIT 2 3.8-39a Amendment No.

Battery Cell Parameters 3.8.6 The information on this page has been deleted.

Intentionally left blank.

Tabl e 3.8.6 1 (page 1 of 1)

Battery Ce ll Parameter Requirements EAfE69R¥ A: EAf E69R¥ B: EATE69R¥ E:

l:IMHS F9R EAEll l:IMHS FeR EACH Al:l:9'tt1ABl:E HMIT DESIGNATED Pil:9T EeNNEETED EEi:!: F9R EAEll PARAMETER Eat E9NNEETED EEl:I:

Electrolyte > '~i rd mum level > Mfoimum le'llel Above top of teve indication mark, and i ndi cation mark, plates, al'ld not

~ ~l 'inch above ~ ~ inch above overflowing maximum 1 e'lfel maximum level i ndi cati Ol'I markE-at i l'ldi cati ol'I mar kW Float Yoltage ~ 2.B v :::. 2.B '"iiI

> 2 .87Z "v Specific ~ 1.195 :::. 1.195 Not more than Gravi tyCb) Cc) 8.028 bel ouv Atffi a'lferage of all connected cells A*verage of all co!'lnected cells Ai'ffi

> 1.285 Average of all connected eel ls

. 1.198 (a) It is acceptable for the electrolyte level to temporarily i ncrease above the specified maximum level during equali ~ ing charges provided i t is not ove rfl mvi ng .

(b) Corrected for el ectrolyte temperature and level. l:evel correctiol'I is not required, horlever, when on float charge and battery charging current is < 1 amp.

(c) A battery charging current of < 1 amp when on float charge is acceptable for meeting specific gravity limits following a battery recharge for.

1) a maximum of 30 days if a deep discharge did not occur; and 2) a rna-x41Tlt1m of 188 days if a deep dis-charge did occur. 1Jhen charging1 current i s used to satisfy specific gra'lfity requirements, specific gra'll ity of each connected cell shall be measured prior to the expiration of t he applicable all owance.

PBAPS UNIT 2 3.8-40 Amendment No.

Programs and Manuals

5. 5 5.5 Programs and Manuals 5.5.15 Battery Monitoring and Maintenance Program This Program provides controls for battery restoration and maintenance. The program shall be in accordance with IEEE Standard (Std) 450-2002, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead - Acid Batteries for Stationary Applications . " as endorsed by Regulatory Guide 1.129 . Revision 2 CRG). with RG exceptions and program provisions as identified below:

~ The program allows the following RG 1.129, Revision 2 exceptions:

l_,_ Battery temperature correction may be performed before or after conducting discharge tests .

.£.,_ RG 1.129. Regulatory Position 1. Subsection 2.

"References . " is not applicable to this program.

1... In lieu of RG 1.129, Regulatory Position 2, Subsection 5.2, "Inspections." the following shall be used: "Where reference is made to the pilot cell. pilot cell selection shall be based on the lowest voltage cell in the battery ."

4. In Regulatory Guide 1.129, Regulatory Position 3, Subsection 5.4.1 . "State of Charge Indicator , " the following statements in paragraph Cd) may be omitted:

"When it has been recorded that the charging current has stabilized at the charging voltage for three consecutive hourl y measurements . the battery is near full charge. These measurements shall be made after the initially high charging current decreases sharply and the battery voltage rises to approach the charger output voltage."

i.,_ In lieu of RG 1.129. Regulatory Position 7. Subsection 7.6,"Restoration," the following may be used: "Following the test . record the float voltage of each cell of the string ."

Q_,_ The program shall include the following provisions:

PBAPS UNIT 2 5.0-18b Amendment No.

Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.15 Battery Monitoring and Maintenance Program (continued) l.,_ Actions to restore battery cells with float voltage <

2.13 V:

f__,_ Actions to determine whether the float voltage of the remaining battery cells is> 2.07 V when the float voltage of a battery cell has been found to be

< 2.13 V:

1.,_ Actions to equalize and test battery cells that had been discovered with electrolyte level below the top of the plates:

!_,_ Limits on average electrolyte temperature.

battery connection resistance, and batter y terminal voltage ; and

.i.,_ A requirement to obtain specific gravity readings of all cells at each discharge test . consistent with manufacturer recommendations.

PBAPS UNIT 2 5.0- 18c Amendment No.

DC Sources-Operating 3.8.4 3.8 ELECTRICAL POWER SYSTEMS

3. 8. 4 DC Sources-Operating LCO 3.8.4 The following DC electrical power subsystems shall be OPERABLE:

a. Unit 3 Division I and Division II DC electrical power subsystems; and

b. Unit 2 Division I and Division II DC electrical power subsystems.

APPLICABILITY: MODES 1, 2, and 3.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One Unit 2 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO due to performance of 3.8.7, "Distribution SR 3.8.4.7 or Systems - Operating," when SR 3.8~ . 6.6 Condition A results in de-energization of a Unit 3 4 kV emergency bus or de-energization of a Unit 2 DC bus.

A.1 Restore Unit 2 DC 7 days electrical power subsystem to OPERABLE status.

(continued)

PBAPS UNIT 3 3.8-28 Amendment No.

DC Sources - Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One Unit 2 DC -------------NOTE------------

electrical power Enter applicable Conditions subsystem inoperable and Required Actions of LCO for reasons other than 3.8.7, "Distribution Condition A. Systems - Operating," when Condition B results in de-energization of a Unit 3 4 kV emergency bus.

B.1 Restore Unit 2 DC 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months electrical power subsystem to OPERABLE status.

k_ One battery charger on C.1 Restore battery 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months one subs ystem terminal voltage to inogerable. greater than or egual to the minimum established float voltage.

AND C.2 Verify battery float Once ger 12 current < 2 amgs. hours AND

(. 3 Restore battery 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months charger to OPERABLE status.

.!h One battery on one D.l Restore battery to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months subs ystem inogerable. OPERABL E status.

(continued)

PBAPS UNIT 3 3.8-29 Amendment No.

DC Sources - Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME E£ . One Unit 2 DC Et .1 Restore Unit 2 DC 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power electrical power subs ~ stem inoperable. subsystem to OPERABLE For reasons other than status.

conditions C, or D.

B£. Required Action and Bf .1 Be in MODE 3. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Associated Completion Time of Condition A, AND B, c, D, or E not met.

F.2 Be in MODE 4. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months

~ - Two or more inoperable fi! .l Enter LCD 3.0.3. Immediately DC electrical power subsystems.

PBAPS UNIT 3 3.8-29a Amendment No.

DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS

NOTE-------------------------------------

SR 3.8.4.1 through SR 3.8.4.8 are applicable only to the Unit 3 DC electrical power subsystems. SR 3.8.4.9 is applicable only to the Unit 2 DC electrical power subsystems.

SURVEILLANCE FREQUENCY SR 3.8.4.1 Verify battery terminal voltage is In accordance

~ 123.5 Von float charge greater than or with the equal to the minimum established float Surveillance voltage. Frequency Control Program.

SR 3.8.4.2 DELETED Verify no oisible corrosion at In accordance battery terminals and connectors. ~

Surveil 1 ance Fref!uency Control Verify battery connection resistance is Program.

f; 40 E 6 ohm! .

SR 3.8.4.3 DELETED Verify battery cells, cell plates , In accordance at'ld racks shm1* ftO visual il'ldicaboft of with the physical damage or abFtormal deterioratioft Sur"Veil lance that could poteFttially degrade battery Freeiuency performat'lce. (Ot'ltrol Program.

(continued)

PBAPS UNIT 3 3.8-30 Amendment No.

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.4 DELETED Remove visible corrosion and verify In accordance battery cell to cell and terminal with t he connecti ons are coated ~ith anti corrosion Surveillance mater"tal. Fre1:1uency Corrtrol Pro9ram .

SR 3.8.4.5 DELETED Verify battery connectio n !11 accordance resistance is ~-4-0 E 6 ohms . with the Surveillance Frequency Control Pro9ram .

SR 3.8.4.6 Verify each required battery charger In accordance supplies ~ 200 amps at greater than or with the equal to 125 V for the minimum established Surveillance float voltage for ~ 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . Frequency Control Program.

Verify each battery charger can recharge the battery to the full y charged state within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months while su ppl ying the largest combined demands of the various continuous stead y state loads. after a battery discharge to the bounding design basis event discharge state.

(continued)

PBAPS UNIT 3 3.8-31 Amendment No.

DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.7 -------------------NOTES-------------------

1. SR 3.8.4 . 8 may be performed in lieu of the service test in SR 3.8.4.7 when SR 3.8.4.8 envelops the duty cycle of the battery . The modified performance discharge test in SR 3.8.6.6 may be performed in lieu of SR 3.8.4.7.

2. This Surveillance shall not be performed in MODE 1, 2, or 3.

However, credit may be taken for unplanned events that satisfy this SR.

In accordance Verify battery capacity is adequate to with the supply, and maintain in OPERABLE status, Surveillance the required emergency loads for the design Frequency duty cycle when subjected to a battery Control service test. Program.

(continued)

PBAPS UNIT 3 3. 8-31a Amendment No.

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.8 Tnis Surveillance snall not be performed in MOOE 1, 2, or 3. llmvever, credit may be taken for unplanned events tnat satisfy this SR.

Ye1ify battery capacity is~ 80% of the In accordance mttrn:tfacturer' s rating v~hen subj eeted to a vd th the performance discharge test or a modified Surveillance performance discharge test. Frequency Control Program.

12 months n*hen battery shows degradation or has reached 8596 of expect-ed-1 i fe wi t-h-capacity < 100%

of--

manufacturer's rating 24 montns *~lien bat:te ry ha!

reached 8596 of the expected life with capad ty ;:.. 10096 of-manufacturer's rating (continued)

PBAPS UNIT 3 3.8-32 Amendment No.

DC Sources - Shutdown 3.8.5 3.8 ELECTRICAL POWER SYSTEMS

3. 8. 5 DC Sources - Shutdown LCO 3.8.5 The following DC electrical power subsystems shall be OPERABLE:

a. Unit 3 DC electrical power subsystems needed to support the DC electrical power distribution subsystem(s) required by LCO 3.8.8, "Distribution Systems-Shutdown";

and

b. Unit 2 DC electrical power subsystems needed to support the DC electrical power distribution subsystem(s) required by LCO 3. 8. 8, "Di stri buti on Systems - Shutdown."

APPLICABILITY: MODES 4 and 5, During movement of irradiated fuel assemblies in the secondary containment.

ACTIONS

NOTE-------------------------------------

LCO 3.0.3 is not applicable.

CONDITION REQUIRED ACTION COMPLETION TIME A,_ One battery charger on A.l Restore battery 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months one subsystem terminal voltage to inoperable. greater than or equal to the minimum established float voltage.

The redundant subs ystem battery and AND chargers OPERABLE.

Verify battery float Once per 12 current < 2 amps. hours Restore battery 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months charger to OPERABLE status.

(continued)

PBAPS UNIT 3 3.8-34 Amendment No.

DC Sources - Shutdown 3.8.5 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME A. (continuedt A.6_ . One or more required A.6_ .1 Declare affected Immediately DC electrical power required feature(s) subsystems inoperable inoperable.

for reasons other than condition A. OR AB.2.1 Suspend CORE Immediately ALTERATIONS.

Required actions and associated completion AND time of condition A not met.

A.$ .2.2 Suspend movement of Immediately i r radiated fue 1 assemblies in the secondary containment.

AND A.$ .2.3 Initiate action to Immediately suspend operations with a potential for draining the reactor vessel.

AND A.6_ .2.4 Initiate action to Immediately restore required DC electrical power subsystems to OPERABLE status.

PBAPS UNIT 3 3.8-35 Amendment No.

DC Sources - Shutdown 3.8.5 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.5.1 -------------------NOTE--------------------

The following SRs are not required to be performed: SR 3.8.4. r Q and SR 3.8.4. a .z_,_

For required Unit 3 DC electrical power In accordance subsystems, the following SRs are with 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 SR 3.8.5.2 -------------------NOTE--------------------

When Unit 2 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 2 SR 3.8.5.1 is applicable.

For required Unit 2 DC electrical power In accordance subsystems, the SRs for Unit 2 with applicable Specification 3.8.4 are applicable. SRs PBAPS UNIT 3 3.8-36 Amendment No.

Battery Cell Parameters 3.8.6 3.8 ELECTRICAL POWER SYSTEMS 3.8.6 Battery Ee++ Parameters LCO 3.8.6 Battery ee++ parameters for the station electrical power subsystem batteries shall be within 'the limits ef-Table 3 . B . G 1.

APPLICABILITY: When associated DC electrical power subsystems are required to be OPERABLE.

ACTIONS

- -----------NOTE--- - ---------------------------------

Separate Condition entry is allowed for each battery.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more batteries A.1 Verif) pilot cells -1 .f. hour

~~i th one or more electrolyte level and batter}' eel 1 float voltage meet parameters not within Table 3.8.6 1 Category-A or B Eftte9or) C limit-s-;-

limits. One battery Perform SR 3.8.4.1 on one subs ystem with one or more battery AND cells float voltage <

2.07. A.2 Verify batter) cell 4 .f. hours parameters meet Table 3.8.6 1 Category E l;mits.

Perform SR 3.8.6.1 Once J'.)e r 7 da) s thereafter AND A.3 Restore battery cell 31 da}'s 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months parameters to

~gor) A and B limits of

~ 3.8.6 1.

Restore affected cell float voltage > 2.07 y_,_

(continued)

PBAPS UNIT 3 3.8-37 Amendment No.

Battery Cell Parameters 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. Rec;it1i red Action and B.1 Bed are 8S!OCiated In1n1edi atel y assoei ated Comp l etion battery i nopera~ 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Time of Condition A Perform SR 3 . 8 . 4.1.

not met. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months AND OR B.2 Restore battery float One or more batteries current to < 2 amQs.

~ti t n a"terage electrolyte t-emperatt1re of tlie representati o*e c:el 1 s not ~vitni n limits.

OR One or more batter i es witn one or more battery een parameters no t wi tlii n E-ategory E limits. One battery on one subs ystem with float current > 2 amgs.

- --- -- --NOTE------- --- ------------ NOTE------- - -----

Regui red Action C.2 Reguired Actions C.1 and C.2 s hall be comQleted if are only aQglicable if electrolyte level was electrol yte level was below below the tO Q of the tog of glates.

Qlates. ---------------- --- ---- ------

c. One battery on one C.1 Restore affected cell 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months subs ystem with one or electrol yte level to more cells electrol yte above the tOQ of glates .

level less than min i mum established AND design l i mits.

C.2 Verify no evidence of 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months leakage.

AND

c. 3 Restore electrol yte level 31 days to greater than or egual to minimum established design limits .

(continued)

PBAPS UNIT 3 3.8-38 Amendment No.

Battery Parameters ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME One battery with Restore battery pilot 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months pi lot cell cell temperature to electrolyte greater than or equal temQerature less than to minimum minimum established established design design limits. limits.

One or more batteries E.1 Restore battery 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months in redun dant ~arameters for subsystems with atteri es in one battery ~arameters system to within not within li mits. 1i mi ts.

Required Action and Declare associated Immediately associated ComQletion battery inoperable.

Time of Condition A.

B. C, D or E not met.

OR One battery on one subsystem with one or more batterv cells with iloat voltage <

2.07 V and float current > 2 amps.

PBAPS UNIT 3 3.8 - 38a Amendment No.

Battery Cell Parameters 3.8.6 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.6.1 Verify battery cell parameters meet In accordance Table 3.8.6 1 Eategor) A limits. with the

-- - --- -------- -- --NOTE- - -- ---------------- Surveillance Not required to be met when battery Frequency terminal voltage is less than the minimum Control established float voltage of SR 3.8.4.1.

Program.

Verify each battery float current is < 2 anps.

SR 3.8.6.2 Verif) each battery cell meets In accordance Table 3.8.6 1 Categor) B limits. Verify with the each battery pilot cell float voltage is > Surveillance 2.07. Frequency Control Program .

Once u~ithin 24 lrntH"S after battery discharge

< 100 v OMce witniM 24 nours after battery overcharg-e-

> 145 v SR 3.8.6.3 Verify average electrolyte temperature of In accordance representative cells is ~ 40 F. Verify with the each battery connected cell electrolyte Surveillance level is greater than or equal to minimum Frequency established design limits. Control Program.

(continued)

PBAPS UNIT 3 3.8-39 Amendment No.

Battery Parameters SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.6.4 Verify each battery pilot cell temoerature In accordance is greater than or egual to minimum with the establ ished design l imits. Surveillance Frequencp Controlrogram SR 3.8.6.5 In accordance

> 2.0 v. with the Surveillance Frequencr; Controlrogram SR 3. 8.6.6 ------------------NOTE--------------------

This Survei 1 lance shal 1 not be oer~ormed in MODE 1, 2. 3. However credit may be taken for unplanned events that satisfy this SR.

Verify battery capacity is > 80% of the In accordance manufacturer's rating when subjected to a with the performance discharge test or a modified Surveillance performance discharge test. Freguencp Controlrogram AND 12 months when battery shows degradation or has reached 85%

of the expected life with capacity < 100%

of manufacturer's rating AND 24 months when battera has reache 85% of the exi;> ected life with capacity > 100%

of manufacturer's rating PBAPS UNIT 3 3.8-39a Amendment No.

Battery Cell Parameters 3.8.6 The information on this page has been delted.

Intentionally left blank.

Table 3.8.6 1 (page 1 of 1)

Battery Cell Parameter Requirements CAH69R¥ A: CATE69R¥ B: CATE69R¥ c.

l::+/-MITS F9R EAElt l:IMHS F9R EAEll All:OWABl:E UMIT DESIGNATED Pil:9T E9NNEETED EEl:I: -feR EAEll PARAMETER EB+/- E9NNEETED EEl:I::

Electrolyte > Minimum 1 evel > Minimum 1 evel Abo vi!! top of

~ indication mark, and indication mark, phtes, and not

~ ~ incn aboV'e and--6 l~ inch above o'llerfl m~i ng maximum level maximum 1 evel indication mar kW indication mar kW Float Vohage ~ 2 .13 II v ~ 2 .13 ...,..

\I

> 2.0;z >t v

Sp!!!d fi c ~ 1. 195 ~ 1.195 Not more than 6ravityCb)(c) 9.828 below AN9 aV'erage of all connected cells Average of all -

connected cells ANB

> 1. 285 Average of all cofll'leeted cells

~ 1.198 (a) It is acceptable for the electrolyte level to temporarily incre-ase above the speeified maximum level during equali~ing charges provided it is not o*verfl owing.

(b) Corrected for electrolyte temperature and level . Level correction is not required, ho~tever , wnen on float charge and bat1:ery d1ar9ing current

! < 1 an1p.

(c) A battery charging current of< 1 amp ~~hen on float cnarge is acceptable fo-r meeting specific graV'it:y limits following a--ba-ttery recharge f01"'7-l) a maximum of 38 days if a deep discharge did not occur; and 2) a--

maximum of 180 days if a deep discharge did oecur. Wnen charging current is used to satisfy specific gravity requirements, specific gravity of eacn connected cell snall be measured prior to the expiration of the applicable allowance.

PBAPS UNIT 3 3.8-40 Amendment No.

Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.15 Battery Monitoring and Maintenance Program This Program provides controls for battery restoration and maintenance. The program shall be in accordance with IEEE Standard (Std) 450-2002, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications," as endorsed by Regulatory Guide 1.129, Revision 2 CRG), with RG exceptions and program provisions as identified below:

~ The program allows the following RG 1.129, Revision 2 exceptions:

l_,_ Battery temperature correction may be performed before or after conducting discharge tests.

£._ RG 1.129 . Regulatory Position 1. Subsection 2.

"References , " is not applicable to this program.

l,__ In lieu of RG 1.129, Regulatory Position 2, Subsection 5.2."Inspections," the following shall be used: "Where reference is made to the pilot cell, pilot cell selection shall be based on the lowest voltage cell in the battery."

.1_,_ In Regulatory Guide 1.129. Regulatory Position 3, Subsection 5. 4 .1. "State of Charge Indicator," the following statements in paragraph Cd) may be omitted:

"When it has been recorded that the charging current has stabilized at the chargin g voltage for three consecutive hourl y measurements , the battery is near full charge. These measurements shall be made after the initially high charging current decreases sharply and the battery voltage rises to approach the charger out put voltage."

5. In lieu of RG 1.129. Regulatory Position 7, Subsection 7 .6. "Restoration," the following may be used: "Following the test, record the float voltage of each cell of the string."

b. The program shall include the following provisions:

PBAPS UNIT 3 5.0 - 18b Amendment No .

Programs and Manuals

5. 5

5. 5 Programs and Manuals 5.5.15 Battery Monitoring and Maintenance Program (continued) l,__ Actions to restore battery cells with float voltage <

2.13 V;

£,_ Actions to determine whether the float voltage of the remaining battery cells is > 2.07 V when the float voltage of a battery cell has been found to be

< 2.13 V:

l,_ Actions to equalize and test battery cells that had been discovered with electrol yte level below the to p of the plates :

1_,_ Limits on average electrol yte temperature ,

battery connection resistance . and battery terminal voltage : and

~ A requirement to obtain s pecific gravity readin gs of all cells at each discharge test , consistent with manufacturer recommendations.

PBAPS UNIT 3 5.0-18c Amendment No.

ATTACHMENT 3 Markup of Technical Specifications Bases Pages (For Information Only)

Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278 Revised Technical Specifications Bases Pages Unit 2 TS Bases Pages B 3.8-59 B 3.8-64a* B 3.8-71 B 3.8-78 8 3.8-81 B 3.8-59a* B 3.8-65 B 3.8-74 B 3.8-78a* 8 3.8-82 B 3.8-60 B 3.8-66 B 3.8-75 B 3.8-78b* 8 3.8-82a*

B 3.8-60a* B 3.8-67 B 3.8-75a* B 3.8-78c* 8 3.8-82b*

B 3.8-63 B 3.8-67a* B 3.8-75b* B 3.8-78d* B 3.8-82c*

B 3.8-63a* B 3.8-68 B 3.8-76 B 3.8-79 B 3.8-63b* B 3.8-69 B 3.8-77 B 3.8-79a*

B 3.8-64 B 3.3-70 B 3.8-77a* 8 3.8-80 Unit 3 TS Bases Pages 8 3.8-59 B 3.8-64a* B 3.8-71 B 3.8-78 B 3.8-81 B 3.8-59a* B 3.8-65 B 3.8-74 B 3.8-78a* B 3.8-82 B 3.8-60 B 3.8-66 B 3.8-75 B 3.8-78b* B 3.8-82a*

B 3.8-60a* B 3.8-67 B 3.8-75a* B 3.8-78c* B 3.8-82b*

8 3.8-63 B 3.8-67a* B 3.8-75b* 8 3.8-78d* B 3.8-82c*

B 3.8-63a* B 3.8-68 B 3.8-76 B 3.8-79 B 3.8-63b* B 3.8-69 B 3.8-77 B 3.8-79a*

B 3.8-64 B 3.3-70 B 3.8-77a* B 3.8-80

Anticipated new pages, subject to change when clean pages are submitted and repagination is completed.

DC Sources-Operating B 3.8.4 BASES BACKGROUND During normal operation, the DC loads are powered from the (continued) battery chargers with the batteries floating on the system.

In case of loss of normal power to the battery charger, the DC loads are powered from the batteries.

The DC power distribution system is described in more detail in Bases for LCO 3.8.7, "Distribution System - Operating,"

and LCO 3. 8. 8, "Di st ri bu ti on System - Shutdown. "

Each battery nas adequate 5torage capacity to carry tne required load continuously for approximately 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Each of the unit's two DC electrical power divisions, consisting of two 125 V batteries in series, four battery chargers (two normally inservice chargers and two spare chargers), and the corresponding control equipment and interconnecting cabling, is separately housed in a ventilated room apart from its chargers and distribution centers. Each division is separated electrically from the other division to ensure that a single failure in one division does not cause a failure in a redundant division.

There is no sharing between redundant Class lE divisions such as batteries, battery chargers, or distribution panels.

Each battery has adequate storage capacity to meet the dut y cycle ( s) discussed in the UFSAR . Chapter 8 ( Ref 7) .

The battery is designed with additional capacity above that required by the design dut y cycle to allow for temperature variations and other factors.

The batteries for 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 105% design demand. The minimum design voltage limit is 105 / 210 V. The minimum design voltage for sifing the battery using the methodology in IEEE 485 (Ref. 3) is based on a traditional 1.81 volts per cell at tne end of a 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months load profile. Tne battery terminal voltage using 1.81 volts per cell is 105 V. Using the LOOP/LOCA load profile, the predicted value of the battery terminals is greater than 105 YOE at the end of the p rof"il e. ~qany lE 1oads ope rate ex cl usi vel y at the beginning of the profile and require greater -t-han the design minimum terminal voltage. The analyzed voltage of the distribution panels and the MCCs is greater than that required during the LOOP/LOEA to support the operation of the lE loads during t ne time period they are required to operate.

(continued)

PBAPS UNIT 2 B 3.8-59 Revision No.

DC Sources - Operating B 3.8.4 The battery cells are of flooded lead acid construction with a nominal specific gravity of 1.215. This specific gravity corresponds to an open circuit battery voltage of approximatel y 120 V for a 58 cell battery Ci .e . . cell voltage of 2.07 volts per cell (Vpc)). The open circuit voltage is the voltage maintained when there is no charging or discharging. Once full y charged with its open circuit voltage > 2.07 Vpc , the battery cell will maintain its capacity for 30 days without further charging. Optimal long term performance however . is obtained by maintaining a float voltage 2.23 to 2.27 Vpc.

This provides adequate over-potential. which limits the formation of lead sulfate and self discharge. The nominal float voltage of 2.25 Vpc corresponds to a total float voltage output of 130.5 V for a 58 cell battery as discussed in the UFSAR . Chapter 8 (Ref. 7) .

Each required battery charger 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 (continued)

PBAPS UNIT 2 B 3.8-59a Revision No.

DC Sources - Operating B 3.8.4 BASES BACKGROUND bank fully charged. Each battery charger has sufficient (continued) capacity to restore the battery from the design minimum charge to its fully charged state within 20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months while supplying normal steady state loads following a LOCA coincident with a loss of offsite power.

The battery charger is normall y in the float - charge mode.

Float - charge is the condition in which the charger is supplying the connected loads and the battery cells are receiving adequate current to optimall y charge the battery. This assures the internal losses of a battery are overcome and the batter y is maintained in a full y charged state.

When desired. the charger can be placed in the equalize mode. The equalize mode is at a higher voltage than the float mode and charging current is correspondingl y higher. The battery charger is operated in the equalize mode after a batter y discharge or for routine maintenance. Following a battery discharge . the battery recharge characteristic accepts current at the current limit of the battery charger (if the discharge was significant . e.g., following a battery service test) until the batter y terminal voltage approaches the charger voltage setpoint. Charging current then reduces exponentiall y during the remainder of the recharge cycle.

Lead-calcium batteries have recharge efficiencies of greater than 95%, so once at least 105% of the ampere-hours discharged have been returned . the battery capacity would be restored to the same condition as it was prior to the discharge. This can be monitored by direct observation of the exponentiall y decayin g charging current or by evaluating the amp-hours discharged from the battery and amp-hours returned to the battery.

A description of the Unit 3 DC power sources is provided in the Bases for Unit 3 LCO 3.8.4, "DC Sources-Operating."

(continued)

PBAPS UNIT 2 B 3.8-60 Revision No.

DC Sources - Operating B 3.8.4 BASES APPLICABLE The initial conditions of Design Basis Accident (OBA) and SAFETY ANALYSES transient analyses in the UFSAR, Chapter 14 (Ref. 1), assume that Engineered Safety Feature (ESF) systems are OPERABLE.

The DC electrical power system provides normal and emergency DC electrical power for the DGs, 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 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 the NRC Policy Statement.

LCO The Unit 2 Division I and Division II DC electrical power subsystems, with each DC subsystem consisting of two 125 V station batteries in series, two battery chargers (one per battery), and the corresponding control equipment and interconnecting cabling supplying power to the associated bus, 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 abnormal operational transient or a postulated OBA. In addition, DC control power (which provides control power for the 4 kV load circuit breakers and the feeder breakers to the 4 kV emergency bus) for two of the four 4 kV emergency buses, as well as control power for two of the diesel generators, is provided by the Unit 3 DC electrical power subsystems.

Therefore, Unit 3 Division I and Division II DC electrical power subsystems are also required to be OPERABLE. A Unit 3 (continued)

PBAPS UNIT 2 B 3.8 - 60a Revision No.

DC Sources - Operating B 3.8.4 BASES ACTIONS B.1 (continued)

If one of the Unit 3 DC electrical power subsystems is inoperable for reasons other than Condition A, the remaining DC electrical power subsystems have the capacity to support a safe shutdown and to mitigate an accident condition.

Since a subsequent worst case single failure could, however, result in a loss of minimum necessary DC electrical subsystems to mitigate a worst case accident, continued power operation should not exceed 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . The 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Completion Time reflects a reasonable time to assess unit status as a function of the inoperable DC electrical power subsystem and takes into consideration the importance of the Unit 3 DC electrical power subsystem.

C.l, C.2. and C.3 Condition C represents one subsystem with one batter y charger inoperable (e.g., the voltage limit of SR 3.8.4.1 is not maintained). Condition C is exited when the standby battery charger is placed in service within two hours. However, if both the operating and standby battery chargers are inoperable , the ACTIONs must be completed while the alternate battery charger is in service. The ACTIONS provide a tiered response that focuses on returning the battery to the full y charged state and restoring a full y qualified charger to OPERABLE status in a reasonable time period. Required Action C.1 requires that the battery terminal voltage be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . This time provides for returning the inoperable charger to OPERABLE status or providing an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage. Restoring the battery terminal voltage to greater than or equal to the minimum established float voltage provides good assurance that , within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . the battery will be restored to its full y charged condition (Required Action C.2 ) from any discharge that might have occurred due to the charger inoperabili 1;.V_,_

A discharged battery having terminal voltage of at least the minimum established float voltage indicates that the battery is on the exponential charging current portion (the second part) of its recharge cycle. The time to return a battery to its full y charged state under this condition is simpl y a function of the amount of the previous discharge and the recharge characteristic of the battery. Thus there is good assurance of full y recharging the battery within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . avoiding a premature shutdown with its own attendant risk.

( continued )

PBAPS UNIT 2 B 3.8-63 Revision No.

DC Sources - Operating B 3.8.4 ACTIONS C.1 . C.2 and C.3 ( continued )

If established battery terminal float voltage cannot be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . and the charger is not operating in the current-limiting mode . a fault y charger is indicated. A fault y charger that is incapable of maintaining established battery terminal float voltage does not provide assurance that it can revert to and operate properly in the current limit mode that is necessary during the recovery period followin g a batter y discharge event that the DC system is designed for.

If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery is partially discharged and its capacity margins will be reduced. The time to return the battery to its full y charged condition in this case is a function of the battery charger capacit y, the amount of loads on the associated DC system . the amount of the previous discharge , and the recharge characteristic of the batter y.

The charge time can be extensive , and there is not adequate assurance that it can be recharged within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months ( Required Action C.2 ) .

Required Action C.2 requires that the battery float current be verified as less than or equal to 2 amps.

This indicates that . if the battery had been discharged as the result of the inoperable battery charger , it is now full y capable of sup pl ying the maximum expected load requirement. The 2 amp value is based on returning the battery to 98% charge and assumes a 5% design margin for the battery . If at the expiration of the initial 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months period the battery float current is not less than or equal to 2 amps this indicates there may be additional battery problems and the battery must be declared inoperable.

Required Action C.3 limits the restoration time for the inoperable batter y charger to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months . This action is applicable if an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage has been used ( e.g. , balance of plant non-Class lE battery charger ) . The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months Completion Time reflects a reasonable time to effect restoration of the qualified battery charger to OPERABLE status.

( continued )

PBAPS UNIT 2 B 3.8-63a Revi s ion No.

DC Sources - Operating B 3.8.4 ACTIONS D.1 (continued)

Condition D represents one subs ystem with one battery inoperable. With one battery inoperable . the DC bus is being supplied by the OPERABLE battery charger. Any event that results in a loss of the AC bus supporting the battery charger will also result in loss of DC to that subs ystem. Recovery of the AC bus. especially if it is due to a loss of offsite power . will be hampered by the fact that many of the components necessary for the recovery (e.g., diesel generator control and field flash.

AC load shed and diesel generator output circuit breakers.

etc.) likel y rel y upon the battery. In addition the energization transients of any DC loads that are beyond the capability of the battery charger and normall y require the assistance of the battery will not be able to be brought online. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit allows sufficient time to effect restoration of an inoperable battery given that the majority of the conditions that lead to batter y inoperability Ce.g. , loss of battery charger , battery cell voltage less than 2.07 V. etc. ) are identified in Specifications 3. 8.4 , 3.8.5 . and 3.8.6 together with additional specific completion times.

Condition EE represents one Unit 2 division subsystem with a loss of ability to completely respond to an event, and a potential loss of ability to remain energized during normal operation. It is therefore imperative that the operator's attention focus on stabilizing the unit, minimizing the potential for complete loss of DC power to the affected subs ystem . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for an inoperable DC Distribution System Subsystem.

If one of the Unit 2 DC electrical power subsystems is inoperable for reasons other than conditions C, or D, (e.g.,

inoperable battery/ batteries, inoperable required battery charger/c~argers , or inoperable required battery charger/chargers and associated ino perable battery/batteries ), the remaining DC electrical power subsystems have the capacity to support a safe shutdown and to mitigate an accident condition. Since a subsequent worst case single failure could result in the loss of minimum necessary DC electrical subsystems to mitigate a worst case accident, continued power operation should not exceed 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Completion Time is consistent with Regulatory Guide 1.93 (Ref. 4) and reflects a reasonable time to assess unit status as a function of the inoperable DC electrical power division and, if the Unit 2 DC electrical power division is not restored to OPERABLE status, to prepare to initiate an orderly and safe unit shutdown . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is also consistent with the allowed time for an inoperable Unit 2 DC Distribution System Subsystem .

( contin ued)

PBAPS UNIT 2 B 3.8-63b Revision No.

DC Sources - Operating B 3.8.4 BASES ACTIONS BF . 1 (continued)

If the 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 overall plant risk is minimized. To achieve this status, the unit must be brought to at least MODE 3 within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and to MODE 4 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . Remaining in the Applicability of the LCO is acceptable because the plant risk in MODE 3 is similar to or lower than the risk in MODE 4 (Ref. 6) and because the time spent in MODE 3 to perform the necessary repairs to restore the system to OPERABLE status will be short.

However, voluntary entry into MODE 4 may be made as it is also an acceptable low-risk state. The allowed Completion Time is reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems.

The completion time to bring the unit to MODE 4 is consistent with the time required in Regulatory Guide 1 .93 (Ref. 4).

Condition ~ corresponds to a level of degradation in the DC electrical power subsystems that causes a required safety function to be lost. When more than one DC source is lost, this results in a loss of a required function, thus the plant is in a condition outside the accident analysis.

Therefore, no additional time is justified for continued operation. LCO 3.0.3 must be entered immediately to commence a controlled shutdown.

SURVEILLANCE As Noted at the beginning of the SRs, SR 3.8.4.1 through REQUIREMENTS SR 3.8.4.8 are applicable only to the Unit 2 DC electrical power subsystems and SR 3.8.4.9 is applicable only to the Unit 3 DC electrical power subsystems .

SR 3.8.4.1 Verifying battery terminal voltage while on float charge for the batteries helps to ensure the effectiveness of the charging s)stem and the abilit) of the batteries to perform their intended function battery chargers. which support 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 (continued)

PBAPS UNIT 2 B 3.8-64 Revision No.

DC Sources - Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.1 (continued)

REQUIREMENTS internal losses of a battery (or battery eell) and maintain the battery (or a battery cell) in a fully charged state while supplying the continuous steady state loads of the associated DC subsystem. On float charge, battery cells will receive adequate current to optimally charge the battery. The voltage requirements are based on the nominal design voltage of the battery and are consistent with the minimum established float voltage (2.13 Vpc times the number of connected cells or 123.5 V for a 58 cell battery at the battery terminals). This voltage maintains the battery plates in a condition that suoports maintaining the grid life.

(continued)

PBAPS UNIT 2 B 3.8- 64a Revision No.

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.1 (continued)

REQUIREMENTS based on the minimum cell voltage that will maintain a charged cell. This is consistent with the assumptions in the battery sizing calculations. The SR must be performed ttnless the battery is on equalize charge or has been on equalize charge any time during the pre"Vious 1 day. This

?H 10*1vs tl'le routine Frequency to be extended u11til such a time that the SR can be properly performed and meaningful results obtai 11ed. The survei 11 ance frequency is appl i cahl-e-and continues during the time that the battery is on e~ualize with the exception that the surveilla11ce does not need to be performed if the battery has been on equalize during the previous 1 day . The additional 1 day allows time for battery voltage to return to normal after the equali~e charge and time to pe1form the test. The intent of the Note is to allow orderly, yet prompt performance of the surveillance that will produce meaningful results once the equalize charge is complete . The Surveillance Frequency is controlled under the Surveillance Frequency Control Program.

SR 3.8.4.2 DELETED Visual inspection to detect corrosion of the battery cells and connections or measurement of the resistance of e-aclt-i-nte r ce 1-t-,-+nte r rack, inter tier, and terminal connection, provides an indication of physical damage or abnormal deteriorati~at could potentially degrade batt'@1""1" performance .

The battery connection resistance limits are established to maintain connection resistance as low as reasonably possible to minimize the overall voltage drop across the battery, and the possibility of battery damage due to heating of connection:! .

The Suroeillance Frequency is controlled under the Surveillance Fre~uency Control Program.

SR 3.8.4.3 DELETED 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 (continued)

PBAPS UNIT 2 B 3.8-65 Revision No.

DC Sources - Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.3 (continued)

REQUIREMENTS 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) .

The Surveillance Frequency is controlled unde1 the S~rveillance Frequency Control Program.

SR 3.8.4.4 and SR 3.8.4.5 DELETED Vi sual inspection and resistance measurements of inter cell , inter rack, inter tier, and terminal connections provides an indication of physical damage or abnormal deterio1ation that could indicate degraded battery condition . The anti corrosion material is used to help ensure good electrical connections and to reduce terminal deterioration. The visual inspect i on for corrosion is not intended to require removal of and inspection under each terminal connection .

The removal of ~isible corrosion is a preventive maintenance SR. The presence of visible corrosion does not necessarily represent a failure of this SR, pro~ided visible corrosion is removed during performance of this Surveillance .

The battery connection resistance limits are established to

~ain connection resistance as low as reasonably pos-s-i-bl-e-to minimi ze the overall voltage drop across the battery , and the possibility of battery damage due to heating of connections .

The Surveillance Frequency is controlled under the Surveillance Frequency Control Program.

SR 3.8.4.6 Battery charger capability requirements are based on This SR verifies the design capacity of the battery chargers. The minimum charging capacity requirement is based on the capacity to maintain the associated battery in its fully charged condition, and to restore the battery to its fully (continued)

PBAPS UNIT 2 B 3.8-66 Revision No.

DC Sources -Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.6 (continued)

REQUIREMENTS charged condition following the worst case design discharge while supplying normal steady state loads. The minimum required amperes and duration ensures that these requirements can be satisfied.

This SR provides two options. One option requires that each battery charger be capable of suppl ying 200 amps at the minimum established float voltage for 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . The ampere requirements are based on the output rating of the chargers. The voltage requirements are based on the charger voltage level after a response to a loss of AC power. The time period is sufficient for the charger tem perature to have stabilized and to have been maintained for at least 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

The other option requires that each battery charger be capable of recharging the batter y after a service test coincident with suppl ying the largest coincident demands of the various continuous steady state loads

{irrespective of the status of the plant during which these demands occur) . This level of loading may not normall y be available following the battery service test and will need to be supplemented with additional loads.

The duration for this test may be longer than the charger si zing criteria since the battery recharge is affected by float voltage. temperature , and the exponential decay in charging current. The battery is recharged when the measured charging current is < 2 amps.

The Surveillance Frequency is controlled under the Surveillance Frequency Control Program.

SR 3.8.4.7 A battery service test is a special test of the battery's capability, as found, to satisfy the design requirements (battery duty cycle) of the DC Electrical Power System. The discharge rate and test length corresponds to the design duty cycle requirements.

The Surveillance Frequency is controlled under the Surveillance Frequency Control Program.

(continued)

PBAPS UNIT 2 B 3.8-67 Revision No.

DC Sources - Operating B 3.8.4 SURVEILLANCE SR 3.8.4.7 (continued)

REQUIREMENTS This SR is modified by two Notes. Note 1 allows performance of either a modified performance discharge test or-a performance discharge test (described in the Bases for SR 3.8.478} in lieu of a service test~ provided the test performed envelops the duty cycle of the batter). This substitution is acceptable because as long as the test ettf'"rent is greater than or e~ual to the actual dut) cycle of the battery, SR 3.8.4.8 represents a more severe test of battery capacity than a ser~ice test.

(continued)

PBAPS UNIT 2 B 3.8-67a Revis ion No.

DC Sources - Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.7 (continued)

REQUIREMENTS The reason for Note 2 is that performing the Surveillance would remove a required DC electrical power subsystem from service, perturb the E~lectrical 9gistribution 5~ystem, and challenge safety systems. Credit may be taken for unplanned events that satisfy the Surveillance.

SR 3.8.4.8 DELETED A battery performanee discharge test is a test of the constant current capacity of a battery, performed between 3 and 30 days after an equali :r:e charge of the battery, to detect any change in the capacity determined b) the acceptance test. The test is intended to determine overall battery deg1adation due to age and usage.

A battery modified performance disenarge test is a simulateti-duty cycle consisting of just two rates; tile one 1ni rrnte rate published for the battery or the largest current load of the duty cycle, followed by the test rate employed for the performance test, both of which envelope the duty cycle of the service test. Si nce the ampere hours removed by a rated one minute discharge represents a very sma l l portion of the battery capacity, the test rate can be changed to that for the performance test without compromising the 1esults of the performance dischar9e test. The battery terminal volta9e for the modified performance diseharge test should rema+n-gf"eater than or equal to the minimum battery terminal voltage specified in the battery performance discharge test.

A modified performance discharge test is a test of the--

battery capacity and its ability to provide a high rate ,

short duration load (usually the highest rate of the duty cycle). This will often confirm the battery's ability to meet the critical period of the load duty cycle, in addition to determining its percentage of rated capacity . Initial conditions for the modified perfo1mance discharge test should be identical to those specified for a performance discharge test.

Either the battery performance discharge test or the modified performance discharge test is acceptable for satisfying SR 3.8.4.8; however, the discharge test may be (continued)

PBAPS UNIT 2 B 3.8-68 Revision No.

DC Sources - Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.8 (continued)

REQUIREMENTS used to satisfy SR 3.8.4.8 while satisfying the requirements of SR 3. 8. 4. 7 at the same t i me only* if tlie test envelops the duty cycle of tlie b8ttery.

The acceptance criteria for this Surveillance i s consistent w+th- IEEE 450 (Ref. 5) and IEEE 485 (Ref. 3) . These references recommend that the battery be replaced if its caf'adty is below 8096 of tne manufacturer's rating. A capacity of 80% shows that the battery rate of deterioration is increasing , even if there is amf'le capacity to meet the load requirements.

The Surveillance Frequency is control led under the Surveillance Frequency Control Program. If the battery sho~vs degradation, or if the battery nas reached 85% of ; ts expected life and capacity is < 100% of the manufacturers f"ating, tne Surveillance Frequency is reduced to 12 montns.

llm~eve r. if the battery sno*ns no deg rad at lel'I but nas reached 85% of its expected life, the Surveillance Frequen cy is only reduced to 24 mol'lths for batteries tnat retain capacity

~0% of tne manufacturer's rating . Degradation is indicated, according to IEEE 450 (Ref. 5) , when tne battery capacity drops by more than 10% relative to its capacity on the previous performance test or when it is 10% below the manufacturer's rating . If the rate of discharge varies significantly from the previous discliarge test, the absolute battery capacity may change ignificantly, resulting in a capacity drop exceeding tne criteri a specified above. Tnis absolute battery capacit~ change could be a result of acid concentration in the plate material, which is not an indication of degradation. Tnerefore, results of tests with significant rate differences should be discussed with tne vendor and evaluated to determine if degradation has oci:u rred. All these Frequencies , ~o'i th tlie excef'tion of tne 24 month Frequency, are consistent with the recommendations in IEEE 450 (Ref. 5). The 24 month Frequency is acceptable, given the battery has shown no signs of degradation, the unit conditions required to perform tne test and otner requirements e~isting to ensure battery performance during tnese 24 month intervals. In addition, the 24 montn Frequency is intended to be consistent hith exf'ected fuel cy el e 1engtns.

(continued)

PBAPS UNIT 2 B 3.8-69 Revision No.

DC Sources- Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.8 (continued)

REQUIREMENTS This SR is modified b) a Note. The reason for the Note is that performing the Surveillance would remo~e a required DE electrical power subs)stem from service, perturb the electrical distribution S)Stem, and challenge safety S)Stems. Credit ma) be taken for unplanned events that

-s-a-tisfy the Surve-Hlance. The DC batteries of the other tttti1:-are exempted from this restriction since they are required to be OPERABLE b) both units and the Surueillance cannot be performed in the manner required by the Note

~ut resulting in a dual unit shutdown.

SR 3.8.4.9 With the exception of this Surveillance, all other Surveillances of this Specification (SR 3.8.4.1 through SR 3.8.4.8) are applied only to the Unit 2 DC electrical power subsystems. This Surveillance is provided to direct that the appropriate Surveillances for the required Unit 3 DC electrical power subsystems are governed by the Unit 3 Technical Specifications. Performance of the applicable Unit 3 Surveillances will satisfy Unit 3 requirements, as well as satisfying this Unit 2 Surveillance Requirement.

The Frequency required by the applicable Unit 3 SR also governs performance of that SR for Unit 2. As Noted, if Unit 3 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 3 SR 3.8.5.1 is applicable. This ensures that a Unit 2 SR will not require a Unit 3 SR to be performed, when the Unit 3 Technical Specifications exempts performance of a Unit 3 SR. (However, as stated in the Unit 3 SR 3.8.5.1 Note, while performance of the SR is exempted, the SR still must be met.)

REFERENCES 1. UFSAR Chapter 14.

2. "Proposed IEEE Criteria for Class lE Electrical Systems for Nuclear Power Generating Stations," June 1969.

3. IEEE Standard 485, 1983.

(continued)

PBAPS UNIT 2 B 3.8-70 Revision No.

DC Sources - Operating B 3.8.4 BASES REFERENCES 4. Regulatory Guide 1.93, December 1974.

(continued)

5. IEEE Standard 450, +/-9-87-2002 .

6. NEDC-32988-A, Revision 2, Technical Justification to Support Risk-Informed Modification to Selected Required End States for BWR Plants, December 2002.

7. UFSAR . Chapter 8.

PBAPS UNIT 2 B 3.8-71 Revision No.

DC Sources - Shutdown B 3.8.5 BASES APPLICABILITY b. Required features needed to mitigate a fuel handling (continued) 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, and 3 are covered in LCO 3.8.4.

ACTIONS LCO 3.0.3 is not applicable while in MODE 4 or 5. However, since irradiated fuel assembly movement can occur in MODE 1, 2, or 3, the ACTIONS have been modified by a Note stating that LCO 3.0.3 is not applicable. If moving irradiated fuel assemblies while in MODE 4 or 5, LCO 3.0.3 would not specify any action. If moving irradiated fuel assemblies while in MODE 1, 2, or 3, the fuel movement is independent of reactor operations. Therefore, in either case, inability to suspend movement of irradiated fuel assemblies would not be sufficient reason to require a reactor shutdown.

A.1. A.2.1. A.2.2. A.2.3. and A.2.4 A.2, and A.3 I-f more than one DE distribution 'ubsystem is required according to LEO 3.8.8, tl'le DE electrical power subsystems remaining OPERABLE with one or more DE electrical poher subsystems inoperable may be capable of supporting sufficient required features to allo\~ continuation of CORE ALTERATIONS, fuel movement, and operations ~~itn a potential for draining the reactor vessel.

By all~uance of the option to declare required features inoperable with as,ociated DE electrical power subsystems inoperable, appropriate restrictions are implemented in accordance vv1tl'I the affected system LEOs' ACTIONS . llowever,

~n many instances, this option may involve undesired administrative efforts. Therefore, tne allowance for sufficiently conservative actions is made (i.e., to suspend CORE ALTERATIONS, movement of irradiated fuel assembl'i es in secondary containment, and any activities that could result in inadvertent draining of the reactor vessel).

(continued)

PBAPS UNIT 2 B 3.8-74 Revision No.

DC Sources - Shutdown B 3.8.5 BASES ACTIONS A.l. A.2.1. A.2.2. A.2.3. and A.2.4 A.2. and A.3 (continued)

Stispension of these activities shall not preclude completion of-actions to establish a safe conservative condition.

These actions minimize the probability of the occurrence of postulated events . It is further required to immediately initiate action to restore the required OE electrical power subsystems and to continue this action until restoration-4-5--

accompti shed in order to provide the necessary DE electrical pou~er to the pl ant safety systems.

The Completion Time of immediately is consistent witn 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 orde~

minimi~e the time during which the plant safety systems may be ~ithout sufficient power.

Condition A represents one subsystem with one battery charger inoperable (e.g .. the voltage limit of SR 3.8.4.1 is not maintained). The ACTIONS provide a tiered response that focuses on returning the battery to the fully charged state and restoring a fully qualified charger to OPERABLE status in a reasonable time period.

Required Action A.1 requires that the battery terminal voltage be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . This time provides for returning the inoperable charger to OPERABLE status or providing an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage.

Restoring the battery terminal voltage to greater than or equal to the minimum established float voltage provides good assurance that, within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , the battery will be restored to its fully charged condition (Required Action A.2) from any discharge that might have occurred due to the charger inoperability.

A discharged battery having terminal voltage of at least the minimum established float voltage indicates that the battery is on the exponential charging current portion (the second part) of its recharge cycle. The time to return a battery to its fully charged state under this condition is simply a function of the amount of the previous discharge and the recharge characteristic of the battery . Thus there is good assurance of fully recharging the battery within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

(continued)

PBAPS UNIT 2 B 3.8-75 Revision No.

DC Sources - Shutdown B 3.8.5 ACTIONS A.l. A. 2 . 1. A. 2. 2. A. 2. 3. and A. 2 . 4 A.2 . and A.3 (continued)

If established battery terminal float voltage cannot be restored to g reater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . and the charger is not operating in the current - limiting mode . a fault y charger is indicated. A fault y charger that is incapable of maintainin g established battery terminal float voltage does not provide assurance that it can revert to and operate pro perl y in the current limit mode that is necessary durin g the recover y period followin g a battery discharge event that the DC s ystem is desi gned for.

If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery is partiall y discharged and its capacity margins will be reduced. The time to return the battery to its full y char ged condition in this case is a function of the battery charger capacity. the amount of loads on the associated DC system , the amount of the previous discharge . and the recharge characteristic of the battery . The char ge time can be extensive . and there is not adequate assurance that it can be recharged within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months (Required Action A.2 ) .

Required Action A.2 requires that the battery float current be verified as less than or equal to 2 amps. This indicates that . if the battery had been discharged as the result of the inoperable battery charger . it has now been full y recharged.

If at the expiration of the initial 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months period the batter y float current is not less than or equal to 2 amps this indicates there may be additional battery problems and the battery must be declared inoperable.

Required Action A.3 limits the restoration time for the inoperable battery charger to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months . This action is

~ licable if an alternate means of restorin g batter y terminal voltage to greater than or equal to the minimum established float voltage has been used (e.g. , balance of plant non-Class lE battery charger) . The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months Completion Time reflects a reasonable time to effect restoration of the qualified batter y charger to OPERABLE status.

(continued)

PBAPS UNIT 2 B 3.8-75a Revision No.

DC Sources - Shutdown B 3.8.5 ACTIONS B.l, B.2.1. B.2.2. B.2.3. and B.2.4 If more than one DC distribution subs ystem is required according to LCO 3.8.8 . the DC subs ystems remaining OPERABLE with one or more DC power sources inoperable may be capable of supporting sufficient required features to allow continuation of CORE ALTERATIONS, fuel movement. and operations with a potential for draining the reactor vessel.

By allowance of the option to declare required features inoperable with associated DC power sources inoperable ,

appropriate restrictions are implemented in accordance with the affected system LCOs' ACTIONS. In man y instances , this option may involve undesired administrative efforts.

Therefore , the allowance for sufficientl y conservative actions is made ( i.e. , to suspend CORE ALTERATIONS . movement of irradiated fuel assemblies. and an y activities that could result in inadvertent draining of the reactor vessel ) .

Suspension of these activities shall not preclude completion of actions to establish a safe conservative condition. These actions minimize the probability of the occurrence of postulated events. It is further required to immediatel y initiate action to restore the required DC electrical power subs ystem [s] and to continue this action until restoration is accomplished in order to provide the necessar y DC electrical power to the plant safet y s ystems.

The Completion Time of immediatel y is consistent with the required times for actions requiring prompt attention.

The restoration of the required DC electrical power subs ystems should be completed as quickly as possible in order to minimize the time during which the plant safety systems may be without sufficient power.

PBAPS UNIT 2 B 3.8-75b Revision No.

DC Sources-Shutdown B 3.8.5 BASES SURVEILLANCE SR 3.8.5.1 REQUIREMENTS SR 3.8.5.1 requires performance of all Surveillances required by SR 3.8.4.1 through SR 3.8.4. 8 .Z 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 electrical power subsystems 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.

SR 3.8.5.2 This Surveillance is provided to direct that the appropriate Surveillances for the required Unit 3 DC electrical power subsystems are governed by the Unit 3 Technical Specifications. Performance of the applicable Unit 3 Surveillances will satisfy Unit 3 requirements, as well as satisfying this Unit 2 Surveillance Requirement. The Frequency required by the applicable Unit 3 SR also governs performance of that SR for Unit 2.

As Noted, if Unit 3 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 3 SR 3.8.5.1 is applicable. This ensures that a Unit 2 SR will not require a Unit 3 SR to be performed, when the Unit 3 Technical Specifications exempts performance of a Unit 3 SR. (However, as stated in the Unit 3 SR 3.8.5.1 Note, while performance of an SR is exempted, the SR still must be met.)

REFERENCES 1. UFSAR, Chapter 14.

PBAPS UNIT 2 B 3.8-76 Revision No.

Battery Eel+ Parameters B 3.8.6 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.6 Battery Eel+ Parameters BASES BACKGROUND This LCO delineates the limits on battery float current as well as electrolyte temperature, level, and float voltage.-

and specific graoity for the DC electrical power subsystems batteries. 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." In addition to the 1i mi tat ions of this Specification. the licensee controlled program also implements a program specified in Specification 5.5.15 for monitoring various battery parameters.

The battery cells are of flooded lead acid construction with a nominal specific gravity of 1.215. This specific gravity corresponds to an open circuit battery voltage of approximately 120 V for 58 cell battery (i.e .. cell voltage of 2.07 volts per cell CVpc )) . The open circuit voltage is the voltage maintained when there is no charging or discharging. Once fully charged with its open circuit voltage > 2.07 Vpc , the battery cell will maintain its capacity for 30 days without further charging per manufacturer's instructions. Optimal long term performance however, is obtained by maintaining a float voltage 2.23 to 2.27 Vpc. This provides adequate over-potential which limits the formation of lead sulfate and self discharge.

The nominal float voltage of 2.25 Vpc corresponds to a total float voltage output of 130.5 V for a 58 cell battery as discussed in the UFSAR . Chapter 8 ( Ref. 3) .

APPLICABLE The initial conditions of Design Basis Accident (OBA) and SAFETY ANALYSES transient analyses in UFSAR, Chapter 14 (Ref. 1), assume Engineered Safety Feature systems are OPERABLE. The DC electrical power subsystems provide normal and emergency DC electrical power for the diesel generators (DGs), 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 as discussed in the Bases of LCO 3.8.4, "DC Sources-Operating," and LCO 3. 8. 5, "DC Sources - Shutdown.

(continued)

PBAPS UNIT 2 B 3.8-77 Revision No.

Battery Eel+ Parameters B 3.8.6 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.6 Battery Eel+ Parameters APPLICABLE Since battery ee1-+ parameters support the operation of the SAFETY ANALYSES DC electrical power subsystems, they satisfy Criterion 3 of the NRC Policy Statement.

LCO Battery etH-+ 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 abnormal operational transient or a postulated OBA.

Electrolyte Battery Parameter limits are conservatively established, allowing continued DC electrical system function even with Eategor~ A ancl-B limits not met. Additional preventative maintenance, testing, and monitoring performed in accordance with the Technical Requirements Manual. Section 3.21. Battery Monitoring and Maintenance Program, is conducted as specified in Specification 5.5.15.

APPLICABILITY The battery ee+=I* parameters are required solely for the support of the associated DC electrical power subsystem.

Therefore, tnese cell battery parameters are only required when the DC power source is required to be OPERABLE. Refer to the Applicability discussions in Bases for LCO 3.8.4 and LCO 3.8.5.

(continued)

PBAPS UNIT 2 B 3.8-77a Revision No.

Battery Eet Parameters B 3.8.6 BASES (continued)

ACTIONS A.l. A.2, and A.3 With parameters of one or more cells in one or more batteries not within limits (i.e., Category A limits not met or Category B limits not met, or Category A and B limits no~

met) but within the Category E limits specified in Table 3. 8.6 1, the battery is degraded but there is still

~ufficient 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 continued operation is permitted for a 1 i mited period .

The pilot cell electrolyte level and float voltage are re~uired to be verified to meet the Category E limits within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months (Re~uired Action A. 1). This check provides a quick indication of the status of the 1emainder of the battery cells . One hour pro~ides time to inspect the electrolyte 1e*vel and t-o conf'irm the fl oat voltage of the ..,+1-e1: eel 1 s.

One hour is considered a reasonable amount of time to perform the required verification.

Verification that the Category E 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 allo~ved to complete tlie initial verification because specific gravity measurements must be obtained for each connected cell. Taking into consideration both the time re~uired to perform the required 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 Fre~uency of pilot cell sur"veillances.

Continued operation is only permitted for 31 da)S before battery cell parameters must be restored to within Category A and B limits. Taking into consideration that ,

~~hile battery capacity is degraded, sufficient capacity exists to perform the intended function and to allow time tB fully restore the battery cell parameters to normal limits, this time is acceptable for operation prior to declaring the DE batteries inoperable.

(continued)

PBAPS UNIT 2 B 3.8-78 Revision No. 0

Battery Eel+ Parameters B 3.8.6 BASES (continued)

ACTIONS A.l, A.2, and A.3 With one or more cells in one or more batteries in one subs ystem < 2.07 V. the battery cell is degraded. Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verification of the required battery charger OPERABILITY is made by monitoring the battery terminal voltage CSR 3.8.4.1) and of the overall battery state of charge by monitoring the battery float charge current (SR 3.8.6.1) . This assures that there is still sufficient battery capacity to perform the intended function.

Therefore . the affected battery is not required to be considered inoperable solel y as a result of one or more cells in one or more batteries < 2.07 V, and continued operation is permitted for a limited period up to 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Since the Required Actions onl y specify "perform , " a failure of SR 3.8.4.1 or SR 3.8.6.1 acceptance criteria does not result in this Required Action not met. However, if one of the SRs is failed the app ropriate Condition (s),

de pending on the cause of the failures . is entered. If SR 3.8.6.1 is failed then there is not assurance that there is still sufficient battery capacity to perform the intended function and the battery must be declared inoperable immediatel y.

B.1 and B.2 One or more batteries in one subs ystem with float > 2 amps indicates that a partial discharge of the batter y capacity has occurred. This may be due to a temporary loss of a battery charger or possibly due to one or more batter y cells in a low voltage condition reflecting some loss of capacity. Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verification of the required battery charger OPERABILITY is made by monitoring the battery terminal voltage. If the terminal voltage is found to be less than the minimum established float voltage there are two possibilities, the battery charger is inoperable or is operating in the current limit mode.

Condition A addresses charger inoperability. If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery has been substantiall y discharged and likel y cannot perform its required design functions. The time to return the battery to its full y charged condition in this case is a function of the battery charger capacity, the amount of loads on the associated DC system, the amount of the previous discharge. and the recharge characteristic of the battery .

( continued )

PBAPS UNIT 2 B 3.8-78a Revision No.

Battery Ee-1+ Parameters B 3.8.6 BASES ( continued )

ACTIONS B.l . and B.2

( continued)

The charge time can be extensive, and there is not adequate assurance that it can be recharged within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months (Required Action B.2 ) . The battery must therefore be declared inoperable.

If the float voltage is found to be satisfactory but there are one or more battery cells with float voltage less than 2.07 V, the associated "OR" statement in Condition F is applicable and the battery must be declared inoperable immediatel y . If float voltage is satisfactory and there are no cells less than 2.07 V there is good assurance that . within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . the batter y will be restored to its full y charged condition (Required Action B.2 ) from an y discharge that might have occurred due to a temporary loss of the battery charger.

A discharged battery with float voltage (the charger set point) ac ross its terminals indicates that the battery is on the exponential charging current portion (the second part) of its recharge cycle. The time to return a batter y to its full y charged state under this condition is simpl y a function of the amount of the previous discharge and the recharge characteristic of the battery . Thus there is good assurance of full y recharging the battery within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . avoiding a premature shutdown with its own attendant risk.

If the condition is due to one or more cells in a low voltage condition but still greater than 2.07 V and float voltage is found to be satisfactory, this is not an indication of a substantiall y discharged battery and 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is a reasonable time prior to declaring the batter y inoperable.

( continued)

PBAPS UNIT 2 B 3.8-78b Revision No.

Battery Ee1-+ Parameters B 3.8.6 BASES (continued)

ACTIONS B.1 . and B.2

( continued)

Since Required Action B.1 onl y s pecifies perform , " a failure of SR 3.8.4.1 acce ptance criteria does not result in the Required Action not met. However , if SR 3.8.4.1 is failed , the app ro priate Condition ( s). de pendin g on the cause of the failure . is entered.

C.l , C.2 , and C.3 With one or more batteries in one subs ystem with one or more cells electrol yte level above the to p of the plates ,

but below the minimum established desi gn limits , the battery still retains sufficient capacit y to perform the intended function. Therefore. the affected battery is not required to be considered inoperable solel y as a result of electrol yte level not met. Within 31 days the minimum established desi gn limits for electrol yte level must be re-established.

With electrol yte level below the to p of the plates there is a potential for dryout and plate degradation. Required Actions C.1 and C.2 address this potential ( as well as provisions in Specification 5.5.15 . Battery Monitorin g and Maintenance Program) . They are modified by a Note that indicates the y are onl y applicable if electrol yte level is below the to p of the plates. Within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months level is required to be restored to above the to p of the plates.

The Required Action C.2 requirement to verify that there is no leakage by visual ins pection and the Specification 5.5.15.b item to initiate action to equalize and test in accordance with manufacturer's recommendation. They are performed followin g the restoration of the electrol yte level to above the top of the plates. Based on the results of the manufacturer's recommended testin g the battery may have to be declared inoperable and the affected cells re placed.

( continued)

PBAPS UNIT 2 B 3. 8-78c Revision No.

Battery Eel+ Parameters B 3.8.6 BASES ( continued )

ACTIONS D.1

( continued )

With one or more batteries in one subs ystem with pilot cell temperature less than the minimum established design limits. 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is allowed to restore the temperature to within limits. A low electrol yte temperature limits the current and power available. Since the battery is sized with margin , while battery capacity is degraded ,

sufficient capacity exists to perform the intended function and the affected battery is not required to be considered inoperable solel y as a result of the pilot cell temperature not met.

With one or more batteries in redundant subs ystems with batter y parameters not within limits there is not sufficient assurance that battery capacity has not been affected to the degree that the batteries can still perform their required function. given that redundant batteries are involved. With redundant batteries involved this potential could result in a total loss of function on multiple s ystems that rel y upon the batteries. The longer Completion Times specified for battery parameters on non-redundant batteries not within limits are therefore not appropriate . and the parameters must be restored to within limits on at least one subs ystem within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

F.1 When an y battery parameter is outside the allowances of the Required Actions for Condition A. B. C. D. or E. sufficient capacity to suool v the maximum expected load requirement is not ensured and the corresponding batter y must be declared inoperable. Additionall y, discovering one or more batteries in one subs ystem with one or more battery cells float voltage less than 2.07 V and float current greater than 2 amps indicates that the batter y capacity may not be sufficient to perform the intended functions. The battery must therefore be declared inoperable immediatel y .

( continued )

PBAPS UNIT 2 B 3.8-78d Revision No.

Battery Eel+ Parameters B 3.8.6 BASES AEH-ON5 B.l feontinued)

When any battery parameter is outside the Category C limit for any connected cell, sufficient capacity to supply the maximum expected load requirement is not ensured and the corresponding DC electrical power subsystem must be declared inoperable. Additfonally, other f)otentially extreme conditions, such as not completing the Required Actions of Condition A within the required Completion Time or aierage electrolyte temf)erature of ref)resentative cells falling below 40 ' F, also are cause for immediately declaring the associated DE electrical pou~er subsy:st~

SURVEILLANCE SR 3.8.6.1 REQUIREMENTS Thi:s SR verifies that Category A battery cell parameters are consistent with IEEE 450 (Ref. 2), which recommends regular battery inspections including voltage, :specific graiity, and electrolyte temperature of pilot cells. The SR must be performed unless the battery is on equali~e charge or has been on equali~e charge any time during the previous 4 days .

This allows the routine Frequency to be extended until such a time that the SR can be properly pe1formed and meaningful results obtained. The surveillance frequency is af)f)licable and continues during the time that the battery - is on equalize with the excef)tion that the surveillance does not need to be f)erformed if the battery has been on equalize during the previous 4 days. The additional 4 days allows time for battery parameters to return to normal after the equali~e diarge (1iominall~ 3 da~s) and tin1e to perform the test (nominally 1 day). The intent of the Note is to allo-od 01"'tl-erly, yet prompt performance of the surveillance that will produce meaningful results once the equalize charge is complete. The Surveillance Frequency is eontro1led under

'the Survei 11 aMce Frequency Control Program.

Verifying battery float current while on float charge is used to determine the state of charge of the battery..._

Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery and maintain the battery in a charged state. The equipment used to monitor float current must have the necessary accuracy and capability to measure electrical currents in the expected range.

The float current requirements are based on the float current indicative of a charged battery. The Surveillance Frequency is controlled under the Surveillance Frequency Control Program.

(continued)

PBAPS UNIT 2 B 3.8-79 Revision No.

Battery Ee-f+ Parameters B 3.8.6 SURVEILLANCE SR 3.8.6.1 REQUIREMENTS (continued) This SR is modified by a Note that states the float current requirement is not required to be met when battery terminal voltage is less than the minimum established float voltage of SR 3.8.4.1. When this float voltage is not maintained the Required Actions of LCO 3.8.4 ACTION A are being taken. which provide the necessary and appropriate verifications of the battery condition. Furthermore. the float current limit of 2 amps is established based on the nominal float voltage value and is not directly applicable when this voltage is not maintained.

SR 3.8.6.2 and SR 3.8.6.5 The Surveillance Frequency is controlled under the Surveillance Frequency Control Program. In addition, within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of a battery discharge < 100 V or within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months of a battery overcharge > 145 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 ~ 100 V, do not constitute battery dis charge provided the battery terminal voltage and float current return to pre transient values. This inspection is also consistent with IEEE 450 (Ref. 2), which recommends sped al inspections follm4i ng a se'llere discharge or overcharge, to ensure that no significant degradation of the battery occurs as a conse~ uence of such discharge or overcharge.

Optimal long term batterv oerformance is obtained by maintaining a float voltage greater than or equal to the minimum established design limits, which corresponds to 130.5 Vat the battery terminals . or 2.25 Vpc . This provides adequate over-potential, which limits the formation of lead sulfate and self discharge. which could eventually render the battery inoperable. Float voltages in this range or less. but greater than 2.07 Vpc, are addressed in Specification 5.5.15. SRs 3.8.6.2 and 3.8.6.5 require verification that the cell float voltages are equal to or greater than the short term absolute minimum voltage of 2.07 V. The Surveillance Frequency i s controlled under The Survellance Frequency Control Program.

(continued)

PBAPS UNIT 2 B 3.8-79a Revision No.

Battery Et4-l- Parameters B 3.8.6 BASES SURVEILLANCE SR 3. 8.6.3 REQUIREMENTS (continued) The Surveillance Frequency is controlled under the Surveillance Frequency Control Program .

lo~uer than normal temperature:s act to inhibit or reduce battery capacity. Thi! SR ensures that the operating temperatures remain i~ithin an acceptable operating range.

Table 3.8 . 6 1 DELETED This table delineates the limits on electrolyte level, float voltage, and specific gravity for three different categories . The meaning of each category is discussed beloh .

Category A defines the normal parameter l imit for eac designated pilot cell in each battery . The cells selected as pilot cells are those whose temperature, voltage, and electroly t e specific grav i ty approximate the state of charge of the entire battery.

The Category A limits specified for electrolyte level are based on manufacturer's recommendations and are consistent with the guidance in IEEE 450 (Ref. 2), with the extra Yi inch allm~ance above the Iii gh ~~at er 1evel indication for operating margin to account for temperature and charge effect-s. In addition to this allowance, footnote a-te-Table 3 . 8.6 1 permits the electrolyte level to be above the specified maximum level during equali~ing charge, provided it is not overflowing. These limits ensure that the plat-es-suffer no physical damage, and that adequate electron transfer capability is maintained in the euent of transient conditions . IEEE 450 (Ref. 2) recommends that electrolyte leoel 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 ? 2.13 V per cell. This value is based on the recommendation of IEEE 450 (Ref . 2), which states that prolonged operation of cells below 2.13 V can reduce the life expectancy of cell!.

The Category A limit specified for specific gravity for each pilot cell is ~ 1.195 (0.020 below the manufacturer's fully (continued)

PBAPS UNIT 2 B 3.8-80 Revision No.

Battery Eel+ Parameters B 3.8.6 BASES

~ Table 3.8.6 1 (continued)

REQUIREMENTS charged nominal specific gra'Vity or a battery charging current that had stabilized at a low value). This value is characte1istic of a charged cell ~tith adequate capacity.

According to IEEE 450 (Ref. 2), the specific gravity readings are based on a temperature of 77 F (25 "C).

'.fhe specific gravity readings are corrected for actual electrolyte temperature and level. For each 3 F (1.67 C) above 77 "F (2S "C), 1 point (0.001) is added to the read+tt1r,-

1 point is subtracted for each 3 F below 77 F. The specific gravity of the electrolyte in a cell increases with a loss of ~tater due to electrolysis or e'Vaporation. Leoel correction will be in accordance with manufacturer's recommendations.

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 le'Vel and float 'Voltage are the same as those specified for Category A artd have been discussed above. Tne Category B limit specified for specific gra'Vity for each connected cell is

~ 1 . 195 (0.020 below the manufacturer's fully charged, nominal specific g1avity) with the average of all connected cells 1.205 (0.010 below the manufacturer's fully charged, nominal specific gravity). These values were developed from mant1facturer's recommendations. The minimum specific g-f'avity value required for each cell ensures that the effects of a highly charged or newly installed cell do not mask overall degradation of tne battery.

Eategory C defines the limit for each connected cell. T~

values, although reduced, provide assurance that sufficient capacity exists to perform the intended function and maintain a margin of safety. When any battery parameter is outside the Category C limit, tne assurance of sufficient capacity described above no longer exists, and the battery must be declared inoperable.

The Eategory C limit specified for electrolyte leoel (above the top of the plates and not overflowing) ensure that tne plates suffer no physical damage and maintain adequate electron transfer capability. The Category C Allowable Value for ooltage is based on IEEE 450 (Ref. 2), which (continued)

PBAPS UNIT 2 B 3.8-81 Revision No.

Battery Cell Parameters B 3.8.6 BASES 5BRVEILLANCE Table 3.8.6 1 (continued)

REQUIREMENTS states that a cell voltage of 2.07 V or below, under float eonditions and not caused by elevated temperature of the cell, indicates internal cell problems and may require cell replacement.

The Category E limit of average specific gravity ~--l-7+/-9e,-+s bas-eti on manufacturer's recommendations. In addition to that limit, it is required that the specific gravity for each connected C'el 1 must be no 1 ess than 0. 020 bel tM the average of al 1 connected eel 1s . This 1 i mi t 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 that apply to specific gravity are applicable to Category A, B, and E specific gravity~ Footnote b of Table 3.8.6 1 requires the above mentioned correction for electrolyte level and temperature, with the exception that level correction is not required when battery charging current, while on float charge, is

< 1 amp. This current provides, in general, an indication of overall battery condition.

Because of specific gravity gradients that are produced dttr-+ng the recharging process, delays of several days may occur while waiting for the specific gravity to stabili~e.

A stabili~ed charger current is an acceptable alternative to s-pee-ific gravity measurement for determining tne state of ehitt'ge of the designated pilot cell. Th'i-5 phenomenon is discussed in IEEE 450 (Ref. 2). Footnote c to Table 3.8.6 1 all m~s the fl oat charge current to be used as an alternate to specific gravity for up to 180 days following a battery recharge after a deep discharge. Witnin 180 days each connected cell 's specific gravity must be measured te-confi rm the state of charge. Followin9 a minor battery rechar9e (sucn as equalizin9 charge that does not follow a deep discharge) specific gravity gradients are not significant, and confirming measurements must be made ~ithin 30 days.

(continued)

PBAPS UNIT 2 B 3.8-82 Revision No.

Battery Eel+ Parameters B 3.8.6 SURVEILLANCE SR 3.8.6.3 REQUIREMENTS

( continued ) The limit specified for electrol yte level ensures that the plates suffer no physical damage and maintains adequate electron transfer capabilit y. The minimum design electrol yte level is the minimum level indication mark on the battery cell jar. The Surveillance Frequency is controlled under The Surveillance Frequency Control Program.

SR 3.8.6.4 This Surveillance verifies that the pilot cell temperature is greater than or equal to the minimum established design limit (i.e . . 50 F) . Pilot cell electrolyte temperature is maintained above this temperature to assure the battery can provide the required current and voltage to meet the design requirements. Temperatures lower than assumed in battery sizing calculations act to inhibit or reduce batter y capacity. The Surveillance Frequenc y is controlled under The Surveillance Frequency Control Program.

SR 3.8.6.6 A batterv oerformance discharge test is a test of constant current capacity of a battery, normall y done in the as found condition . after having been in service. to detect an y change in the capacity determined by the acceptance test. The test is intended to determine overall batter y degradation due to age and usage.

Either the battery performance discharge test or the modified performance discharge test is acceptable for satisfying SR 3.8.6.6; however . onl y the modified performance discharge test may be used to satisfy the batter y service test requirements of SR 3.8.4.7.

A modified discharge test is a test of the battery capacity and its ability to provide a high rate , short duration load (usuall y the highest rate of the duty cycle ) . This will often confirm the battery 's ability to meet the critical period of the load dut y cycle . in addition to determining its percentage of rated capacit y.

Initial conditions for the modified performance discharge test should be identical to those s pecified for a service

( continued )

PBAPS UNIT 2 B 3.8-82a Revision No.

Battery Eel+ Parameters B 3.8.6 SURVEILLANCE SR 3.8.6.6 (continued)

REQUIREMENTS It may consist of just two rates: for instance , the one minute rate for the batter y or the largest current load of the duty cycle , followed by the test rate employed for the performance test . both of which envelope the dut y cycle of the service test. Since the ampere-hours removed by a one minute discharge re presents a very small portion of the battery capacity , the test rate can be changed to that for the performance test without compromising the results of the performance discharge test. The batter y terminal voltage for the modified performance discharge test must remain above the minimum batter y terminal voltage specified in the batter y service test for the duration of time equal to that of the service test.

The acceptance criteria for this Surveillance are consistent with IEEE-450 ( Ref. 2) and IEEE - 485 ( Ref. 4) .

These references recommend that the battery be replaced if its capacity is below 80% of the manufacturer's rating . A capacity of 80% shows that the batter y rate of deterioration is increasing . even if there is ample capacity to meet the load requirements. Furthermore, the battery is sized to meet the assumed dut y cycle loads when the battery design capacity reaches this 80% limit.

The Frequenc y for this test is in accordance with The Frequency Control Program. 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 Frequenc y is reduced to 12 months . However. if the batter y shows no degradation but has reached 85% of its expected life , the Surveillance Frequency is onl y reduced to 24 months for batteries that retain capacity > 100% of the manufacturer's rating. Degradation is indicated ,

according to IEEE-450 ( Ref. 2) , when the battery capacity dro ps by more than 10% relative to its capacit y on the previous performance test or when it is 10% below the manufacturer's rating. All these Frequencies are consistent with the recommendations in IEEE-450 ( Ref. 2) .

This SR is modified by a Note. The reason for the Note is that performing the Surveillance would remove a required DC electrical power subs ystem from service ,

perturb the electrical distribution system , and challen ge safety systems.

(continued)

PBAPS UNIT 2 B 3.8- 82b Revision No.

Battery Eel-l Parameters B 3.

8.6 REFERENCES

1. UFSAR, Chapter 14.

2. IEEE Standard 450, T9&1-2002 .

3. UFSAR . Chapter 8.

4. IEEE Standard 485 . 1983.

PBAPS UNIT 2 B 3.8-82c Revision No.

DC Sources-Operating B 3.8.4 BASES BACKGROUND During normal operation , the DC loads are powered from the (continued) battery chargers with the batteries floating on the system.

In case of loss of normal power to the battery charger , the DC loads are powered from the batteries.

The DC power distribution system is described in more detail in Bases for LCO 3.8.7 , "Distribution System-Operating,"

and LCO 3.8.8, "Distribution System-Shutdown. "

Each battery has adequate stora~o capacity to carry thr required +/-oad contultlously :or appr2H1Rtc _ely c hours .

Each of the unit ' s two DC electrical power divisions, consisting of two 125 V batteries in series, four battery chargers (two normally inservice chargers and two spare chargers), and the corresponding control equipment and interconnecting cabling, is separately housed in a ventilated room apart from its chargers and distribution centers. Each division is separated ele c trically from the other division to ensure that a single failure in one division does not cause a failure in a redundant division. There is n o sharing between redundant Class lE divisi o ns such as batteries, battery chargers, or distributi on panels.

Each battery has adequate storage capacity to meet the duty cycle(s) discussed in the UFSAR , Chapter 8 (Ref 7) . The battery is designed with additional capacity above that required by the design duty cycle to allow for temperature variations and other factors .

The batteries for 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 105 design demand. The minimum design voltage limit is 105/210 V. Th e minimum a e siqn vo1*aqe f o r sizing the bat~ery us:n q the methodology .:.n lEEiE> q95 ' Re: . >1 is bases on a tr:.diti ona1 1 . 81 volts per ce1- a* '.:he end et a , hour _ oad profile. The battery tnrminal voltage using " . 81 volrs per cell is 103 V. Using the LiOOP/LOG.'\ load profile , ::hP pre d icted value or the battery terminals is greater than iQ§ VDC at the en d et the pro:Eile . Maw; JF; loads opcrale eHclusively at the beginning or thr pror1le and require sreater than the design m+/-n1wum terminal v ' tagc . The analyzed voltage of the d+/-strinur1on panols ana the Hl Cs i s q-reater than that' required during the LOOP / LOG\ t o support the operation of the lb ::.oaos during the t::_mr periad thry arr requ1rcd to operate .

(continued)

PBAPS UNIT 3 B 3 . 8-59 Revision No .

DC Sources-Operating B 3.8.4 BASES The battery cells are of flooded lead acid construction with a nominal specific gravity of 1.215 . This specific gravity corresponds to an open circuit battery voltage of approximately 120 V for a 58 cell battery (i . e ., cell voltage of 2 . 07 volts per cell (Vpc)) . The open circuit voltage is the voltage maintained when there is no charging or discharging . Once fully charged with its open circuit voltage> 2 . 07 Vpc, the battery cell will maintain its capacity for 30 days without further charging . Optimal long term performance however , is obtained by maintaining a float voltage 2 . 23 to 2 . 27 Vpc .

This provides adequate over-potential , which limits the formation of lead sulfate and self discharge . The nominal float voltage of 2.25 Vpc corresponds to a total float voltage output of 130 . 5 V for a 58 cell battery as discussed in the UFSAR , Chapter 8 (Ref . 7) .

Each required battery charger 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 (continued)

PBAPS UNIT 3 B 3 . 8-59a Revision No .

DC Sources-Operating B 3.8.4 BASES BACKGROUND bank fully charged. Each battery charger has sufficient (continued) capacity to restore the battery from the design minimum charge to its fully charged state within 20 hours2.314815e-4 days 0.00556 hours 3.306878e-5 weeks 7.61e-6 months while supplying normal steady state loads following a LOCA coincident with a loss of offsite power.

The battery charger is normally in the float-charge mode .

Float-charge is the condition in which the charger is supplying the connected loads and the battery cells are receiving adequate current to optimally charge the battery . This assures the internal losses of a battery are overcome and the battery is maintained in a fully charged state .

When desired , the charger can be placed in the equalize mode . The e q ualize mode is at a hi g her volta g e than the float mode and charging current is correspondingly hi g her . The batter y charg er is o p erated in th~ equalize mode after a battery discharge or for routine maintenance . Following a battery discharge , the battery recharge characteristic accepts current at the current limit of the battery charger (if the discharge was significant , e . g ., following a battery service test) until the battery terminal voltage approaches the charger voltage setpoint . Charging current then reduces exponentially during the remainder of the recharge cycle .

Lead-calcium batteries have recharge efficiencies of greater than 95 , so once at least 105 of the ampere-hours discharged have been returned , the battery capacity would be restored to the same condition as it was prior to the discharge. This can be monitored by direct observation of the exponentially decaying charging current or by evaluating the amp-hours discharged from the batter y and amp -hours returned to the batter;(.:.

A description of the Unit 3 DC power sources is provided in the Bases for Unit 3 LCO 3.8.4, "DC Sources-Operating ."

(continued)

PBAPS UNIT 3 B 3.8-60 Revision No .

DC Sources-Operating B 3.8.4 BASES APPLICABLE The initial conditions of Design Basis Accident (OBA} and SAFETY ANALYSES transient analyses in the UFSAR, Chapter 14 (Ref. 1), assume that Engineered Safety Feature (ESF) systems are OPERABLE.

The DC electrical power system provides normal and emergency DC electrical power for the DGs, 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 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 the NRC Policy Statement.

LCO The Unit 2 Division I and Division II DC electrical power subsystems, with each DC subsystem consisting of two 125 V station batteries in series, two battery chargers (one per battery), and the corresponding control equipment and interconnecting cabling supplying power to the associated bus, 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 abnormal operational transient or a postulated OBA. In addition, DC control power (which provides control power for the 4 kV load circuit breakers and the feeder breakers to the 4 kV emergency bus) for two of the four 4 kV emergency buses, as well as control power for two of the diesel generators, is provided by the Unit 3 DC electrical power subsystems.

Therefore, Unit 3 Division I and Division II DC electrical power subsystems are also required to be OPERABLE. A Unit 3 (continued)

PBAPS UNIT 3 B 3.8-60a Revision No .

DC Sources-Operating B 3.8.4 BASES ACTIONS B.l (continued)

If one of the Unit 3 DC electrical power subsystems is inoperable for reasons other than Condition A, the remaining DC electrical power subsystems have the capacity to support a safe shutdown and to mitigate an accident condition.

Since a subsequent worst case single failure could, however, result in a loss of minimum necessary DC electrical subsystems to mitigate a worst case accident, continued power operation should not exceed 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . The 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Completion Time reflects a reasonable time to assess unit status as a function of the inoperable DC electrical power subsystem and takes into consideration the importance of the Unit 3 DC electrical power subsystem.

C . l , C . 2 , and C . 3 Condition C represents one subsystem with one battery charger inoperable (e . g ., the voltage limit of SR 3 . 8 . 4 . 1 is not maintained) . Condition C is exited when the standby battery charger is placed in service within two hours . However , if both the operating and standby battery chargers are inoperable , the ACTIONS must be completed while the alternate battery charger is in service . The ACTIONS provide a tiered response that focuses on returnin g the batter y to the fully charged state and restoring a fully qualified charger to OPERABLE status in a reasonable time period . Required Action C . l requires that the battery terminal voltage be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . This time provides for returning the inoperable charger to OPERABLE status or providing an alternate means of restorin g batter y terminal volta ge to greater than or equal to the minimum established float voltage. Restoring the battery terminal voltage to greater than or equal to the minimum established float voltage provides good assurance that , within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , the battery will be restored to its fully charged condition (Required Action C . 2) from any discharge that might have occurred due to the charger inoperability .

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

£eturn a battery to its full y char g ed state under this condition is simply a function of the amount of the previous discharge and the recharge characteristic of the battery . Thus there is good assurance of fully recharging the battery within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , avoiding a premature shutdown with its own attendant risk .

(continued)

PBAPS UNIT 3 B 3.8-63 Revision No .

DC Sources-Operating B 3.8.4 BASES ACTIONS C . l , C . 2 and C . 3 (continued)

If established battery terminal float voltage cannot be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , and the charger is not operating in the current-limiting mode , a faulty charger is indicated . A faulty charger that is incapable of maintaining established battery terminal float voltage does not provide assurance that it can revert to and operate properly in the current limit mode that is necessary during the recovery period following a battery discharge event that the DC system is designed for .

If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery is partially discharged and its capacity margins will be reduced . The time to return the battery to its fully charged condition in this case is a function of the battery charger capacity , the amount of loads on the associated DC system , the amount of the previous discharge , and the recharge characteristic of the battery .

The charge time can be extensive , and there is not adequate assurance that it can be recharged within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months (Required Action C . 2) .

Required Action C . 2 requires that the battery float current be verified as less than or equal to 2 amps .

This indicates that , if the battery had been discharged as the result of the inoperable battery charger , it is now fully capable of supplying the maximum expected load requirement . The 2 amp value is based on returning the battery to 98 charge and assumes a 5 design margin for the battery . If at the expiration of the initial 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months period the battery float current is not less than or equal to .£_am~s this indicates there may be additional b~ttery problems and the battery must be declared inoperable .

Required Action C . 3 limits the restoration time for the inoperable battery charger to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months . This action is

~icable if an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage has been used (e . g . , balance of plant non-Class lE battery charger) . The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months Completion Time reflects a reasonable time to effect restoration of the qualified battery charger to OPERABLE status.

(continued)

PBAPS UNIT 3 B 3 . 8 - 63a Revision No .

DC Sources - Opera ting B 3.8.4 BASES ACTIONS D. l (continued)

Condition D reo resents one subs y stem with_Qile batter i inoperable . With one battery inoperable , the DC bus is being supplied by the OPERABLE battery charger . Any event that results in a loss of the AC bus supporting the battery charger will also result in loss of DC to that subsystem . Recovery of the AC bus , especially if it is due to a loss of offsite power , will be hampered by the fact that many of the components necessary for the recovery (e . g ., diesel generator control and field flash ,

AC load shed and diesel generator output circuit breakers ,

etc . ) likely rely upon the battery . In addition the energization transients of any DC loads that are beyond the capability of the battery charger and normally require the assistance of the battery will not be able to be brought online . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit allows sufficient time to effect restoration of an inoperable battery given that the majority of the conditions that lead to battery inoperability (e . g ., loss of battery charger , battery cell voltage less than 2 . 07 V, etc . ) are identified in Specifications 3 . 8 . 4 , 3 . 8 . 5, and 3 . 8 . 6 together with additional specific completion times .

GE .l Condition GE represents one Unit 2 divl:sicn subsystem with a loss of ability to completely respond to an event, and a potential loss of ability to remain energized during normal operation. It is therefore imperative that the operator ' s attention focus on stabilizing the unit, minimizing the potential for complete loss of DC power to the affected subsystem . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for an inoperable DC Distribution System Subsystem .

If one of the Unit 2 DC electrical power subsystems is inoperable for reasons other than conditions C, or D, (e.g.,

inoperablr battery/bo:Eeri 0 s , inoprrable iequirea battery rharger/eharqers 1 or inoperable required battery charger /oharg?rs and associated inoperable battery /batter1es ), the remaining DC electrical power subsystems have the capacity to support a safe shutdown and to mitigate an accident condition. Since a subsequent worst case single failure could result in the loss of minimum necessary DC electrical subsystems to mitigate a worst case accident, continued power operation should not exceed 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Completion Time is consistent with Regulatory Guide 1.93 (Ref. 4) and reflects a reasonable time to assess unit status as a function of the inoperable DC electrical power division and, if the Unit 2 DC electrical power division is not restored to OPERABLE status, to prepare to initiate an orderly and safe unit shutdown. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is also consistent with the allowed time for an inoperable Unit 2 DC Distribution System Subsystem .

(continued)

PBAPS UNIT 3 B 3 . 8-63b Revision No .

DC Sources - Operating B 3.8.4 BASES ACTIONS -91'. 1 (continued)

If the 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 overall plant risk is minimized. To achieve this status, the unit must be brought to at least MODE 3 within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . Remaining in the Applicability of the LCO is acceptable because the plant risk in MODE 3 is similar to or lower than the risk in MODE 4 (Ref. 6) and because the time spent in MODE 3 to perform the necessary repairs to restore the system to OPERABLE status will be short. However , voluntary entry into MODE 4 may be made as it is also an acceptable low-risk state. The allowed Completion Time is reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems. The completion time to bring the unit to MODE 4 is consistent with the time required in Re gulator y Guide 1 . 93 (Ref . 4) .

£.G . 1 Condition £.G corresp o nds to a level of degradation in the DC electrical power subsystems that causes a required safety function to be lost. When more than one DC s o urce is lost, this results in a loss of a required function , thus the plant is in a condition o utside the accident analysis. Therefore, no additional time is justified for continued operation. LCO 3.0.3 must be entered immediately to commence a controlled shutdown.

SURVEILLANCE As Noted at the beginning of the SRs , SR 3 . 8.4.1 thro ugh REQUIREMENTS SR 3.8.4 . 8 are applicable only to the Unit 3 DC electrical power subsystems and SR 3.8.4.9 is applicable only to the Unit 2 DC electrical power subsystems.

SR 3.8.4.1 Verifying battery terminal voltage while on float charge for the batteries helps to ensure the effectiveness of the charqi n g system ana thr aoi l ity of the batteries o perform th e i r intended fun r*::-4-eft battery chargers , which support 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 (continued)

PBAPS UNIT 3 B 3.8-64 Revision No.

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.1 (continued)

REQUIREMENTS internal losses of a battery (or ba-tery ce~l) and maintain the battery (or a battery eel+/-) in a fully charged state while supplying the continuous steady state loads of the associated DC subsystem . On float charge ,

battery cells will receive adequate current to optimally charge the battery . The voltage requirements are based on the nominal design voltage of the battery and are consistent with the minimum established float voltage (2 . 13 Vpc times the number of connected cells or 123 . 5 V for a 58 cell battery at the battery terminals) . This voltage maintains the battery plates in a condition that supports maintaining the grid life .

(continued)

PBAPS UNIT 3 B 3 . 8-64a Revision No .

DC Sources-Operating B 3.8 . 4 BASES SURVEILLANCE SR 3.8.4.1 (continued)

REQUIREMENTS based OA the ffiAifflUfR cell YOlt ,go rha1 'flizl F!\aintaln a eh a rged eell . TJ:ns is 'unsistent *.1ith the assmnp' ions in tnc bJttery sizing cnzculat1ons . Thr SR Rust oe performed un+/-ess th - oattery is or. cq:ual1ze eharEJc or nas been on equal i::e rharEJe an:~!' time iuring t=he prev1 aus 1 day . ':'his a.L xo11s r hr routine trequency to b~ etttend~d unt+/-l such a time that the 8P can be properly performed and mean1nqrul rcsulrs on:aineci .

The surYcillance frequency 1s appl+/-oJble and con*inues during the tiffie that the batLery is on equal::-e ;atn the ettccption :hat rhe =urvci+/-lance dccs noE n°ed Eo oe performed i _ Ehc battery has seen on rqua;ize during -he previous 1 da;*. !'he additional 1 day allm1s t:HF.e :or batts.ry -.. oltag~ -o return re nor~~] aftrr the tqual1ze charge and t_ffie te pcrfrn*!fi the test . ~h.- intent et lno ~late. is to aj_lm<' crderly ,

yet profflpt pc rf ormanPe of - ne sur-r i llanr.e tnat Hilz produce weaningful results once the equaiize charqe is - omplet - . The Surveillance Frequency is controlled under the Surveillance Frequency Control Program .

SR 3.8.4.2 DELETED Visu3] inspection FP dete0c esrrosien nf ehe battery cells and c0finect*ons or ~zasurem n: of the r sistanc sf 0

ear;fi inter r* 11 , inter rctclc 1 inter ti0r, an':! rerminal conneration , provides an 'ndication er pnysicaz damage or abnormal 'ieterim:-.ition that could potPF1-!azly deqrcidc battery

~

ihe bat*ery connection r 0 s*stan°c limits are es~abljshcd to lf,a-:.ntain r;onnec" ion r::;i stancr as lm1 as re.,sonably possible to miniwize the over~ll vo_~age drop across the ~a:tcry 1 aEo the possibility ot oat:ery damage due ts heatinq of canqc-t+/-cA8 .

':"h1 :;;urveizlance : requency J:S ,- ontroz:i:ed under= th<:

Survcillornc.-- ~r ' qu.-:ncy 1-ontro} Prograffi .

SR 3.8.4.3 DELETED Visual inspert on ot 'he bacr ry cells, eell pates ,

0 and battery raeks prev'dcs an indicJtion of pnysical aamage or abnorffial deterior~tion tnat could potent1a+/-iy dcqrade ba' tcry performance . The presenre or physical damage or dcterior-arion dots not necessar1i:y represent J tazi11re of (continued)

PBAPS UNIT 3 B 3 . 8- 65 Revision No .

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.3 (continued)

REQUIREMENTS this FR, oreYided an evaluation jcEerminEs :har the phy!ica+/-

aamage or dete11eraEion does net artccL tho OPbRABTLITY uf th2 battery (its abil1ry to perform iLs jcsign function)

The Surveillan'E Freeu:nay is controlled under thr Surv:+/-llance Frequency Control P£ogram .

SR 3.8.4.4 and SR 3.8.4 . 5 DELETED ~a1 inFpection dnd resistance measurefficnrs ot inter ceil 1 inter raclt 1 inter t:er 1 and tcrffi ' na eonnt::ctibn!-,

provides in indleut1on o* p~ys12a: oamage or abnor~al dctcr1orat1on :hat rou~d inoicate argradco bat:ery

onditivn.

The anti corrosien ffiatcr+/-a. is used ~o he;p ensure good clectr1aal conncer10"1c; aAEl r-o ir.dur" c-eH!U:Adl d2tcr1oraEJ:Ofl.

Th visuu_ incpecrion for 0 0 nr~rsion is net intcnoed re rcq*1ire rcffiov01 of ana inspc 0 r-inn unck" caan '"enftinal eennccEion .

The r~mevar st visib ~ c corrcsie11 is a preventiv . maintenance SR. l'h 0 !JFC sencc or vis io le c ar res ion do e s AO t Ac:'- 0 ssar i l'f-Fcprc sc n t a railore of t.n,,s SR, provided visibl* *- orres+/-cr1--i reffiov0d dur ' ng pcrtermance of tA ' s Survcillarer.

-he battery eenneetion resist"atlt'E liffii: s are cstotlishea te main"ain sonneer1en r s:stance us _911 ,9 rcasorubly possibl -

0 to minimiEe the overall vo_~agr d*op arross tne bat:ery 1 and the pcssibiriLy et tat! ry damagr due to heat+/-ng of COAAC;:ticAS.

The ~urveilldnc c Frequency +/-S

ontrolird under the SurvrillaRce Frequency CoAtrEl Proaruffir SR 3.8.4.6 2aEECKy charger capability requ:remento are oarrd on This SR verifies the design capacity of the battery chargers. The minimum charging capacity requirement is based on the capacity to maintain the associated battery in its fully charged condition , and to restore the battery to its fully (continued)

PBAPS UNIT 3 B 3 . 8-66 Revision No.

DC Sources - Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.6 (continued)

REQUIREMENTS charged condition following the worst case design discharge while supplying normal steady state loads. The minimum required amperes and duration ensures that these requirements can be satisfied.

This SR provides two options . One option requires that each battery charger be capable of supplying 200 amps at the minimum established float voltage for 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . The amcere reauirements are based on the output rating of the chargers . The voltage requirements are based on the charger voltage level after a response to a loss of AC power . The time period is sufficient for the charger temperature to have stabilized and to have been maintained for at least 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

The other option requires that each battery charger be capable of recharging the battery after a service test coincident with supplying the largest coincident demands of the various continuous steady state loads (irrespective of the status of the plant during which these demands occur) . This level of loading may not normally be available following the battery service test and will need to be supplemented with additional loads .

The duration for this test may be longer than the char~

sizing criteria since the battery recharge is affected by float voltage , temperature , and the exponential decay in charging current . The battery is recharged when the measured charging current is < 2 amps .

The Surveillance Frequency is controlled under the Surveillance Frequency Control Program.

SR 3.8.4 . 7 A battery service test is a special test of the battery ' s capability , as found , to satisfy the design requirements (battery duty cycle) of the DC Electrical Power System. The discharge rate and test length corresponds to the design duty cycle requirements .

The Surveillance Frequency is controlled under the Surveillance Frequency Control Program.

(continued)

PBAPS UNIT 3 B 3.8-67 Revision No .

DC Sources= Opera ting B 3.8.4 BASES SURVEILLANCE SR 3.8.4.7 (continued)

REQUIREMENTS This SR is modified by two Notes. Note 1 allows performance of e1ther a modified performance discharge test er-a-performanee disehargP -est rdeseribed in the Bases for SA 1 . 8 . q . 8) in lieu of a service test ~ provided the test pcrforwed enveloos the duty cyele of thr batlery . This subsritution is aeeeptaole because as ~?~q as the te~

current is greater than or equae to Lhe actual duty ejcle of the bartery , bR 3 . 8 . 1 . 8 Fepresents a m,re severt test sf battery capacity than a serv1cc test.

(continued)

PBAPS UNIT 3 B 3 . 8 - 67a Revision No .

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.7 (continued)

REQUIREMENTS The reason for Note 2 is that performing the Surveillance would remove a required DC electrical power subsystem from service, perturb the £~ lectrical B~ istribution ~s ystem , and challenge safety systems. Credit may be taken for unplanned events that satisfy the Surveillance.

SR 3 . 8.4 . 8 DELETED ,'\ batter*t perfon:Ranee d .i schJ:rge *est is c: ~est ,- f Hte-constant eurre n t capaczry et a b1ttsry 1 pcrformrd b:t11ern 3 ano 30 days after an equalize charge of the bat

cry , ED detect any change in the capacity dctrrmined by the aceeptanec test . Inc test is intrnaed to de-ermine overall bcctery degra13tion SdC to age and usage .

A battery ffiod+/-fied performance ~i"chargc reet is a siffiulatcd duty cycle 2ons1st1nq ef 3ust :we rat - s ; he one m'nute ratr publishc-d for lhe battery or -:he larqcst eun* enE lo,,d or *he rjJ'.::y cyr1e 1 tel+/-o*,1cd oy the test ra t e employed rer rf-.c P* rformunee test , beth of 1:h1ch envr~ope tne du:y cyrlc st the servire test . 1' i nc the ampere nours r0mo*,rea by " £a-ea 0

~schargc represeRts a very sma~l port.:on f -Hte-aattcry capacity , the test rate can oe ehaRgea to Lhut tcr the performance cest without comprLm ' sing L~e rcsui

n ot !he performance dischurgc tes~ . The bat-cry tnrminal valtaqe for t~e modified perforffianee eiaeharge test shcu.d r:ma+/-n greater than er equal Ee the ffiin1mum eat:ery terminal voltagt spe=iried in the aa-tery prrformanrr disehJ~ge test .

A modif+/-rd performance discnarge *est is a :st ~r *he W.-:rcry capaci11* and: its aoi!it~* *" prcvidr a fligh ra~

snort ddration :oao 1usually the t.1qhes1 r *,te cf * '1 - duty cycle) . Tflis .,; ill often confirm the bJ'tcry ' s ati!i-y tr meet rhe critical per1od of the load duty cy=lc 1 ' n addiri*:n to determining its percentage of ratrd eapaei*y. Initial conditions for the modiried perf c rmanee ais?hGrqc test should se iaeAtioal to those sper

fied tor a pcrtorffianc: d10chargc

~

itflcr the battnry ocrforffianec dise~arge test er Lfle ffiOd1fi 0 a oerformance a+/-scnarge rrs t is arreptablr f~F sar1sfy1ng ER 3 . 8 . 1 . 8; hmieve!', tfle dis: ::flarg . te01: may be-(continued)

PBAPS UNIT 3 B 3.8-68 Revision No .

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.8 (continued)

REQUIREMENTS used to :;atisfy e>R 3 . 8.1.B ';1hi 1 c ::atisfy'.nq the r=cqu r e rncnEs of SR J . B.q . 7 a: the sam t'me unly it ~ hr tPst - nvelu~s the duEy cycle ot the bact:ry .

The aecepranre erieeria fer this Surveillance Is consistent

'*ath HJEo 450 (Ref . &l and TEE>t: lf3 \Ref. 3). 1hese refcrencss reco!!lfRend that rnr ball or=y be tPplaced if its eapasiEy +/-5 oe~O'a' 80 et the lf\anufacturer ' s Eating . A capacity of 80 ° shows tnat rhe batrery ruto ot aeterio~ulibP is in c: reasir.g, even +/-f rher i 6 ampl . c apar:i ': y to ffi CC t lh*

load requirements.

The 3urvci+/-lanoe ~requeney is controlled ciAder thr 8brve1llanee Frequency Control P*ogram . If ~he batrcry shows dcqrasation , nr it rhr bat:ery hae rroehed 8§ or *ra

~Kpe:tcd life ana capacity is < 100 of the manufaceur 0 rs rating, the Survriz+/-anee Fr 0 qurFey is rcducei Eo

2 ffionehs .

However , it the battery sho*.is RO degraaa::ior rut ha *; re:icheo SS of its eHpeetrd life, tne Survei+/-la 0 ec E:rrquency is on.:.y reduced to 24 months for ba-cer1os tha

rcta*~ ~apa=1ty

> zOO of the f!ianufacc* urer ' s ra* inq . D0 graaation is Htd-4:eat e d 1 accord ' ncr Ee lf.88 430 (Rrt. " ,, "1hrr th e bart' e ry c opa c iey dr ops by mo r e than 10 r 0 .ativr ~o its rapa c +/-ty on the previous performance test nr when 1 ~ is 10 " below the manutacrurer ' s rat1ng . if Ehc ra-e of iiseharg2 varz2e significantly from tne previous ci

s - hacgr t2s1 1 -he aesolut:..

bJttery capacity may change si§nifi3antly , result

ng in a c ,1pae1ty drop eiteeed:..Rg tne c:r+/-" C"ia sr::er1 fied ai:Jove. This abso+/-ute battery caoacily ehanqc eou a be a rrsu ' t 1f ~ - ia ccneentration in the plare ma** er;a+/- , 1;f'1 - h is ret an

ndicati1 n of dqp*aaatiorL Ther.-:o*c , rPOU+/-L> of :::st:; H:'..th Ri ar.ifi c ant rat. c ditt e r::n c cs should OP d i oc uss2d n*it:1 :~

1 v r nd o r ana evaluated to det

rffiine if a c grada1 i ~ n has o:::currod . .n.11 these t requcACiC5 1 '*htn the P:!t:cpt1or. o:: :h _

2; .month frequency, are con.:;: stem.. ;,ith the reco!Rffiendatiui _

.:.n i6E8 ~50 Flet. §, . The ~4 mont-r. Frequc* 1c*,r l:S a::::ep"Jblc. ,

qiven the battery has sho;m no sigr.s of r1egradat j on , tnr unit conditions requires r - pcrfrrm -h?

est and other rc:quireffH nts cHisting tr ensure bat-cry rcrtormanee db* ir.E!'

these Ll ffiOnth interva 1 s . In 1tidieion 1 the ~4 month frequency is intended ro be rorois:ent "ath 2:cpe::t:d fuel e y e .Le 1 e r,gths.

(continued)

PBAPS UNIT 3 B 3.8-69 Revision No.

DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.8 (continued)

REQUIREMENTS This 8R is modified by a NoEe . The reason foe rhc Note is that performin§ tne Survr;il+/-ance *..*ould remove a r-equired DC elee1:1:-i cal po"n'er subsy*;tcm rreF£1 scrYiee 1 pertu10 the e+/-eelr1eal distribution system , and chal:enqe saf:ty ay~!cms.

Crea+/-t may se -aKen for unplanneo eYencs that satisfy ~he Surve+/-llanee . 1he DC ba-t*ries of the ethrr Jni- arc eitcH!pred froffi this restriPt1on S+/-Pce they are required lo be OPEJR.'\BbEi by beth units and the Survr1+/-lane? earrnot be performed 1 r; the manne: rrqu* red ry tl'le Nott "1ithout

-re-st1lt1n13 Hi a due.; unit shutdo1m .

SR 3.8.4.9 With the exception of this Surveillance, all other Surveillances of this Specification (SR 3.8.4.1 through SR 3.8.4.8) are applied only to the Unit 3 DC electrical power subsystems. This Surveillance is provided to direct that the appropriate Surveillances for the required Unit 2 DC electrical power subsystems are governed by the Unit 2 Technical Specifications. Performance of the applicable Unit 2 Surveillances will satisfy Unit 2 requirements, as well as satisfying this Unit 3 Surveillance Requirement.

The Frequency required by the applicable Unit 2 SR also governs performance of that SR for Unit 3. As Noted, if Unit 2 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 2 SR 3.8.5.1 is applicable. This ensures that a Unit 3 SR will not require a Unit 2 SR to be performed, when the Unit 2 Technical Specifications exempts performance of a Unit 2 SR. (However, as stated in the Unit 2 SR 3.8.5.1 Note, while performance of the SR is exempted, the SR still must be met.)

REFERENCES 1. UFSAR, Chapter 14.

2. "Proposed IEEE Criteria for Class lE Electrical Systems for Nuclear Power Generating Stations," June 1969.

3. IEEE Standard 485, 1983.

(continued)

PBAPS UNIT 3 B 3.8-70 Revision No .

DC Sources-Operating B 3.8.4 BASES REFERENCES 4. Regulatory Guide 1.93, December 1974.

(continued)

5. IEEE Standard 450, ~2002 .

6. NEDC-32988-A, Revision 2, Technical Justification to Support Risk-Informed Modification to Selected Required End States for BWR Plants, December 2002.

7. UFSAR , Chapter 8 .

PBAPS UNIT 3 B 3.8-71 Revision No.

DC Sources - Shutdown B 3.8.5 BASES APPLICABILITY b. Required features needed to mitigate a fuel handling (continued) 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 c o ld shutdown condition or refueling condition.

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

ACTIONS LCO 3.0.3 is not applicable while in MODE 4 or 5. However, since irradiated fuel assembly movement can occur in MODE 1, 2, or 3, the ACTIONS have been modified by a Note stating that LCO 3.0.3 is not applicable. If moving irradiated fuel assemblies while in MODE 4 or 5, LCO 3.0.3 would not specify any action. If moving irradiated fuel assemblies while in MODE 1, 2, or 3, the fuel movement is independent of reactor operations. Therefore, in either case, inability to suspend movement of irradiated fuel assemblies would not be sufficient reason to require a reactor shutdown.

A . 1, ! . . : . 1 , l\ . 2 . 2, A. * . 1 , ana /\, 2 . 4 A. 2, and A. 3 If mure tnan one DC distrjbut1on subsysreffi is requ£rcd according -e bCO J.B.B, the De eloc - r1ea1 r2*.1er sJt.s:,*stems remaining OPSRPiBLEi *,1i1 h one or more DC e1Fetrieal py,;er subsystems inooerable may be eapabz 0 of suppor:1ng sutti 0 i ' nt

~i red features : u , 1 l o*"' c on~ i Ruat1 o n of : OP.b r:,TERl\TIO?W 1 fu e l movemPnt, and op 0 ~ations 111th a po t~ nt1a_ f~r draining -

the reaGlnr vessel .

By allo*<<an0e cf the opti GA to drc _are required feaEUL.. s inoperable Hith assoc a"ed DC clre=rical po11e:E subsystcw.a inoperabze, appropriate restrictions are 1mp+/-cmented 'n aseol:"danee '<ll tn the affecteo syst'cffi LCOs ' 7\CTIONF:. '{oHe*:er 1 in many instances, tn1s epE"6A ffiay iAvo:ve undesired aElffiin1strat1ve efforts . TAEH' ferc, the' al+/-O'+MAP for stJfficieAtly eonsrrvat.::.ve anti o ns ' s fftade ! i.e., t o suspPn d-COREi ,",L~t:.Rl\':':::ml.- 1 mov e ment of irradiat e d fuel usse?.lbL.Ls '..A secondary contazAffiEnt 1 and any activities th - t cculd result in inadverteAt draining r& the r actor v , ssel 1 *

(continued)

PBAPS UNIT 3 B 3.8-74 Revision No.

DC Sources - Shutdown B 3.8.5 BASES ACTIONS A.l, A. 2 . 1, A.2 . 2 , A. 2 . 3 1 anti A . 2 . ~ A . 2 . and A . 3 (continued}

Suspension of those activities sha~: not pre=+/-ude 0=ffip!et i on af ac t ions to establish a sate conservative =onaiti0n . T~ese actions ~inimivr the probability cf the c c currcnec cf postulat e d c-1cnts . I t '. s turth 0 E required r e iffllfledia~ely iniliatc aetioFt to restore the rrquired DC rl e eEriea~ pm:er subsysteffis ana ,,, :ontinu 0 this action until restoru~ion is aeeemplisncd in order !e provide the necessary DC elcetrieaz poHer co ;=he pxunt sat=t'J' sys t eFRs.

The Completion T.:..:11 o f iR'lffis Jiately is ;:;onsis r eflt Hi th ;:J.* :e-require d times for asti ons requiring pr ompt attenti on . The restoration et the- r 0 q"Jired DG e lect r isa:: p o.,;er subsy.;* ows shoul d oe c offiplet r o as quisltly as pJssiblc iH order E'o fflir. 1wc1ze the tll'l\P au ring 11tn C"'* t h e pl ant safrty systc fFS lf\ay be 1<'ithout su-ticien~ pm; - r .

Condition A represents one subsystem with one battery charger inoperable (e . g . , the voltage limit of SR 3 . 8 . 4 . 1 is not maintained} . The ACTIONS provide a tiered response that focuses on returning the battery to the fully charged state and restoring a fully qualified charger to OPERABLE status in a reasonable time period .

Required Action A . 1 requires that the battery terminal voltage be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . This time provides for returning the inoperable charger to OPERABLE status or providing an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage .

Restoring the battery terminal voltage to greater than or equal to the minimum established float voltage provides good assurance that , within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , the battery will be restored to its fully charged condition (Required Action A . 2) from any discharge that might have occurred due to the charger inoperability .

A discharged battery having terminal voltage of at least the minimum established float voltage indicates that the battery is on the exponential charging current portion (the second part} of its recharge cycle . The time to return a battery to its fully charged state under this condition is simply a function of the amount of the previous discharge and the recharge characteristic of the battery . Thus there is good assurance of fully recharging the battery within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

(continued}

PBAPS UNIT 3 B 3.8-75 Revision No .

DC Sources Shutdown B 3.8.5 BASES ACTIONS A.l , ~, l\.L . 2 , P*. 2 . J , dF1d l'i . L .1 A . 2 , and A. 3 (continued If established battery terminal float voltage cannot be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , and the charger is not operating in the current-limiting mode , a faulty charger is indicated . A faulty charger that is incapable of maintaining established battery terminal float voltage does not provide assurance that it can revert to and~rate properly in the_

current limit mode that is necessary during the recovery period following a battery discharge event that the DC system is designed for .

If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery is partially discharged and its capacity margins will be reduced . The time to return the battery to its fully charged condition in this case is a function of the b~ttery charger capacity , the amount of loads on the associated DC system , the amount of the previous discharge , and the recharge characteristic of the battery . The charge time can be extensive , and there is not adequate assurance that it can be recharged within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months (Required Action A . 2) .

Required Action A. 2 requires that the battery float current be verified as less than or equal to 2 amps . This indicates that , if the battery had been discharged as the result of the inoperable battery charger , it has now been fully recharged .

If~the~iration of the initial 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months ~eriod the battery float current is not less than or equal to 2 amps this indicates there may be additional battery problems and the battery must be declared inoperable .

Required Action A . 3 limits the restoration time for the inoperable battery charger to 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months . This action is applicable if an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage has been used (e . g ., balance of plant non-Class lE battery charqer) . The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months Completion Time reflects a reasonable time to effect restoration of the qualified battery charger to OPERABLE status .

(continued)

PBAPS UNIT 3 B 3.8-75a Revision No.

DC Sources Shutdown B 3.8.5 BASES ACTIONS B. 1 , B. 2 . 1 , B . 2 . 2 , B . 2 . 3 , and B . 2 . 4 If more than one DC distribution subsystem is required according to LCO 3 . 8 . 8 , the DC subsystems remaining OPERABLE with one or more DC power sources inoperable may be capable of supporting sufficient required features to allow continuation of CORE ALTERATIONS , fuel movement , and operati~ns with a potential foF draining the reactor vessel .

By allowance of the option to declare required featur~

inoperable with associated DC power sources inoperable ,

appropriate restrictions are implemented in accordance with the affected system LCOs ' 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 any activities that could result in inadvertent draining of the reactor vessel)

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

systems may be without sufficient power .

PBAPS UNIT 3 B 3 . 8 - 75b Revision No .

DC Sources - Shutdown B 3.8.5 BASES SURVEILLANCE SR 3.8.5.1 REQUIREMENTS SR 3.8.5.1 requires performance 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 electrical power subsystems 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.

SR 3.8.5.2 This Surveillance is provided to direct that the appropriate Surveillances for the required Unit 2 DC electrical power subsystems are governed by the Unit 2 Technical Specifications. Performance of the applicable Unit 2 Surveillances will satisfy Unit 2 requirements, as well as satisfying this Unit 3 Surveillance Requirement. The Frequency required by the applicable Unit 2 SR also governs performance of that SR for Unit 3.

As Noted, if Unit 2 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 2 SR 3.8.5.1 is applicable. This ensures that a Unit 3 SR will not require a Unit 2 SR to be performed, when the Unit 2 Technical Specifications exempts performance of a Unit 2 SR. (However, as stated in the Unit 2 SR 3.8.5.1 Note, while performance of an SR is exempted, the SR still must be met.)

REFERENCES 1. UFSAR, Chapter 14.

PBAPS UNIT 3 B 3.8-76 Revision No.

Battery ~ Parameters B 3.8.6 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8. 6 Battery Ge+/-+/- Parameters BASES BACKGROUND This LCO de lineates the limits on battery float current as well as elec trolyte temperature , level, and float voltage, and specific qravity for the DC electrical power subsystems batteries. 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 ." In addition to the limitations of this Specification , the licensee controlled program also implements a program specified in specification 5 . 5 . 15 for monitoring various battery parameters .

The battery cells are of flooded lead acid construction with a nominal specific gravity of 1 . 215 . This specific gravity corresponds to an open circuit battery voltage of approximately 120 V for 58 cell battery (i . e ., cell voltage of 2 . 07 volts per cell (Vpc)) . The open circuit voltage is the voltage maintained when there is no charging or discharging . Once fully charged with its open circuit voltage > 2 . 07 Vpc , the battery cell will maintain its capacity for 30 days without further charging per manufacturer ' s instructions . Optimal long term performance however , is obtained by maintaining a float voltage 2 . 23 to 2 . 27 Vpc . This provides adeauate over -potential which limits the formation of lead sulfate and self discharge .

The nominal float voltage of 2 . 25 Vpc corresponds to a total float voltage output of 130 . 5 V for a 58 cell battery as discussed in the UFSAR , Chapter 8 (Ref . 3) .

APPLICABLE The initial conditions of Design Basis Accident (OBA) and SAFETY ANALYSES transient analyses in UFSAR, Chapter 14 (Ref. 1), assume Engineered Safety Feature systems are OPERABLE. The DC electrical power subsystems provide normal and emergency DC electrical power for the diesel generators (DGs), 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 as discussed in the Bases of LCO 3.8.4, "DC Sources-Operating," and LCO 3.8.5,

" DC Sources-Shutdown.

(continued)

PBAPS UNIT 3 B 3.8-77 Revision No.

Battery ~ Parameters B 3.8.6 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.6 Battery Ge-+/-+ Parameters BASES APPLICABLE Since battery :'-+/--+/- parameters support the operation of the SAFETY ANALYSES DC electrical power subsystems, they satisfy Criterion 3 of the NRC Policy Statement.

LCO Battery ee++/- 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 c o ndition after an abnormal operational transient or a postulated OBA.

El eelr o :yte Battery Parameter limits are conservatively established , allowing continued DC electrical system function even with Categ or y A t:HTt-B limits not met. Additional p reventative maintenance , testing , and monitorin g p erformed _

in accordance with the Technical Requirements Manual , Section 3 . 21 , Battery Monitoring and Maintenance Program , is conducted as specified in Specification 5 . 5 . 15 .

APPLICABILITY The battery -et4-~ parameters are required solely for the support of the associated DC electrical power subsystem .

Therefore, these eell battery parameters are only required when the DC power source is required to be OPERABLE . Refer to the Applicability discussions in Bases for LCO 3 . 8.4 and LCO 3 . 8 . 5.

(continued)

PBAPS UNIT 3 B 3 . 8- 77a Revision No .

Battery ~ Parameters B 3.8 . 6 BASES (continued)

ACTIONS A.l, A.2, and A.3 With parameters ot one or more cel+/-s in one or ffiOFc baEzcrics not \u,** hin rHRits (i . e. , '::ategor)' A l:imits no~- ffiCE or CaEegory B rimits not met , or Categery A and B limits not R'leEl but ;nthin the Ca"egory G limit"s spreif1e9 in Table 3 . 8 . o 1 , the bar*ery is degrades but zhere is still sufficient capacity zo ~crform the inrendcd function .

Therefore , the affected bateery is noE rrquired to be cons1der0d inoperaole soJely as a resu1* ef Category A or B liffiiEs not met , and continued operation is perwitted fur a

+/-imited pcriea .

The pilot cell elecrrolyte lever ano t+/-oat vollogc ar.

requires to be ver1tied ~o ffiee:: th~ Car c gcr-1* -: lJl!'.its .i- ::!nn 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months 1Reguired l\etion A . 1). This eheclc pr-o*,;idr.:; a qui.::l<

indicatioR et tne status of the r.!flainder of -he ba::r* ry cells. One hour provides tiffie te JnspeeL the elrctrolyte level and lo 0 oni+/-rffi the flra- vo_-age af the p+/-l9t s - +/-+/-5.

One hour is considcrrd a *rasonable affiount rf tiwc . to prrfcrm the r-eauirea verifieaticn .

Verif+/-eation :nat the Cazegory r limits are mrt lhequirea Ac::ion A.i) prov~aes asuurancc thaE daring th Eiw 0 needee re

!"estor2 the par1meters to tne C'cit~qery P and P limits, !:.fie--

oattery is still sapaole of pcrforffi1ng its intenaea cunet+/- ill .

A !'Jeri od of 2 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months is a+/-lm1ed to coRpletr ~he EH" 1al veri:ioation because speciric gravity !fleasur fflen;:s fI:Ust oe obtained for each connerted erl 1

Ta tine in-o censi*:kratiun beth the time required to perf8rw rhe required vcrifica _ion and lhr assurance that the ba t=ry erll parameters are net severely degraded , this t*ffie is considcreo rrasenabll. The verification lS repeared at 7 day intrrva+/-s 1rn:::i+/- th _

parameters are restored to G3tcqery P or B limits. This periodic ve.riticat-iofl is cr,nsistsnt 11ith tJ-.2 nerma1 Fr qu _ney-of p1loe cell surveillances .

continued operat10R is o~ly permi::~eci for 31 dayc scforr battery eel+/- parameters mus~ br r-eseorr_d to *..*ithin CeJteqcry ,e, and B liwits . 'facing lntc e-.in:.;idera*i r: that , *,;hi+/-e battery eapacit:t is degraded , sufti Bient cap ic'.:ty eHists Ee perform the iritenoed func::+/-on and *o allm,* t:mc :o fuily r s:ore Ehc 0 baLrery cezJ parameters to Rorma+/- limi-s, this tiffiL is rif>tabxe for- opeta~icn pr*or to derlaring the uC bat~er1es inoperable.

(continued)

PBAPS UNIT 3 B 3 . 8-78 Revision No.

Battery ~ Parameters B 3.8. 6 BASES (continued)

ACTIONS A.l, A.2, and A.3 With one or more cells in one or more batteries in one subsystem< 2 . 07 V, the battery cell is degraded . Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verification of the required battery charger OPERABILITY is made by monitoring the battery terminal voltage (SR 3 . 8 . 4 . 1) and of the overall battery state of charge by monitoring the battery float charge current (SR 3 . 8 . 6 . 1) . This assures that there is still sufficient battery capacity to perform the intended function .

Therefore , the affected battery is not required to be considered inoperable solely as a result of one or more cells in one or more batteries < 2 . 07 V, and continued operation is permitted for a limited period up to 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Since the Required Actions only specify perform ," a failure of SR 3 . 8 . 4 . l or SR 3 . 8 . 6 . 1 acceptance criteria does not result in this Required Action not met . However ,

if one of the SRs is failed the appropriate Condition(s) ,

depending on the cause of the failures , is entered . If SR 3 . 8 . 6 . 1 is failed then there is not assurance that there is still sufficient battery capacity to perform the intended function and the battery must be declared inoperable immediately .

B . l and B . 2 One or more batteries in one subsystem with float > 2 amps indicates that a partial discharge of the battery capacity has occurred . This may be due to a temporary loss of a battery charger or possibly due to one or more battery cells in a low voltage condition reflecting some loss of capacity . Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verification of the required battery charger OPERABILITY is made by monitoring the battery terminal voltage . If the terminal voltage is found to be less than the minimum established float voltage there are two possibilities , the battery charger is inoperable or is operating in the current limit mode .

Condition A addresses charger inoperability . If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery has been substantially discharged and likely cannot perform its required design functions . The time to return the battery to its fully charged condition in this case is a function of the battery charger capacity , the amount of loads on the associated DC system , the amount of the previous discharge , and the recharge characteristic of the battery .

(continued)

PBAPS UNIT 3 B 3 . 8-78a Revision No .

Battery ~ Parameters B 3.8.6 BASES (continued)

ACTIONS B . l , and B . 2 (continued)

The charge time can be extensive , and there is not adequate assurance that it can be recharged within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months (Required Action B . 2) The battery must therefore be declared inoperable .

If the float voltage is found to be satisfactory but there are one or more battery cells with float voltage less than 2 . 07 V, the associated OR " statement in Condition Fis applicable and the battery must be declared inoperable immediately . If float voltage is satisfactory and there are no cells less than 2 . 07 V there is good assurance that , within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , the battery will be restored to its fully charged condition (Required Action B . 2) from any discharge that might have occurred due to a temporary loss of the battery charger .

A discharged battery with float voltage (the charger setpoint) across its terminals indicates that the battery is on the exponential charging current portion (the second part) of its recharge cycle . The time to return a battery to its full y char g ed state under this condition is simp l y a function of the amount of the previous discharge and the recharge characteristic of the battery . Thus there is good assurance of fully recharging the battery within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , avoiding a premature shutdown with its own attendant risk .

If the condition is due to one or more cells in a low voltage condition but still greater than 2 . 07 V and float voltage is found to be satisfactory , this is not an indication of a substantially discharged battery and 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is a reasonable time prior to declaring the battery inoperable .

(continued)

PBAPS UNIT 3 B 3 . 8-78b Revision No .

Battery f!e-+/--+/-. Parameters B 3.8.6 BASES (continued)

ACTIONS B . l , and B . 2 (continued)

Since Required Action B . l only specifies " perform ," a failure of SR 3 . 8 . 4 . l acceptance criteria does not result in the Required Action not met . However , if SR 3 . 8 . 4 . l is failed , the appropriate Condition(s) , depending on the cause of the failure , is entered .

C . l , C . 2 , and C . 3 With one or more batteries in one subsystem with one or more cells electrolyte level above the top of the plates ,

but below the minimum established design limits , the battery still retains sufficient capacity__!_o _~rform the intended function . Therefore , the affected battery is not required to be considered inoperable solely as a result of electrolyte level not met . Within 31 days the minimum established design limits for electrolyte level must be re-established .

With electrolyte level below the top of the plates there is a potential for dryout and plate degradation . Required Actions C . l and C . 2 address this potential (as well as provisions in Specification 5 . 5 . 15 , Battery Monitoring and Maintenance Program) . They are modified by a Note that indicates they are only applicable if electrolyte level is below the top of the plates . Within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months level is required to be restored to above the top of the plates .

The Required Action C . 2 requirement to verify that there is no leakage by visual inspection and the Specification 5 . 5 . 15 . b item to initiate action to equalize and test in accordance with manufacturer ' s recommendation . They are performed following the restoration of the electrolyte level to above the top of the plates . Based on the results of the manufacturer ' s recommended testing the battery may have to be declared inoperable and the affected cells replaced .

(continued)

PBAPS UNIT 3 B 3 . 8-78c Revision No .

Battery ~ Parameters B 3.8.6 BASES (continued)

ACTIONS D. l (continued)

With one or more batteries in one subsystem with pilot cell temperature less than the minimum established design limits , 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is allowed to restore the temperature to within limits . A low electrolyte temperature limits the current and power available . Since the battery is sized with margin , while battery capacity is degraded ,

sufficient capacity exists to perform the intended function and the affected battery is not required to be considered inoperable solely as a result of the pilot cell temperature not met .

E.l With one or more batteries in redundant subsystems with battery parameters not within limits there is not sufficient assurance that battery capacity has not been affected to the degree that the batteries can still perform their required function, given that redundant batteries are involved . With redundant batteries involved this potential could result in a total loss of function on multiple systems that rely upon the batteries . The longer Completion Times specified for battery parameters on non-redundant batteries not within limits are therefore not appropriate , and the parameters must be restored to within limits on at least one subsystem within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

F. l When any battery parameter is outside the allowances of the Required Actions for Condition A, B, C, D, or E , sufficient capacity to supply the maximum expected load requirement is not ensured and the corresponding battery must be declared

~nop erable . Additionall y , discoverin g one or more batteries in one subsystem with one or more battery cells float voltage less than 2 . 07 V and float current greater than 2 amps indicates that the battery capacity may not be sufficient to perform the intended functions . The battery must therefore be declared inoperable immediately .

(continued)

PBAPS UNIT 3 B 3 . 8 - 78d Revision No .

Battery Ge+/-+ Parameters B 3.8.6 BASES J\CTIOHS 1conEiAUPd)

When any battery paraff\eter is cu-side the Co~e~ory L liffiit for any connected cell 1 sufficient capaeiry to supply ~he FRa21HRum cJ1pcetcd load requirefflf'At is Rot ensured and the correspondi n g DC electrical po11er subsys1ew must be dee:ared inoperable . P.cdditionally , other potcn::..:.ally eJEtrcFRe conditio n s , sueh as Rot: COffcpJ et 1f1g the Required l\etlORS o::

Conaibon A *.nthin the required CoFRp ethn Tiffie or average electrolyte temperature of reoresentative cells fa - ~inq belov: 90 ° F 1 also ar=e cause f o r i fflffl ed:ia"rly declaring ':he assoeiat:cci Dl' electrica~ po;1er subsystef'! iRopcrabl,., .

SURVEILLANCE SR 3.8.6.1 REQUIREMENTS This FR verities tha- Category A baetcry rell paramr1nr2 arc aonsis t en;: 11itr. :SES J§O !Rei. 2) 1 11hich rc;coRlfftenas regular ba* -?ry inspecti 0 ns including v-ltagc , specific gravity , an~

e:cetrelyte temperature o f pilot cells . The Sh must be perforRed unl e ss the oattery is on equa111e charge or has been on equalize :harg: any time during the previous 4 days.

r.is alloHs the routiRe !'reaueney to be rl!tenciea un-il such a time that ~he SR 0 an br properly performed una ffieaning:u '

results ootaincd . The surveillance f requcn:y ic applicable and continues during the time tRat the battery 1s on cqua_ize *.11th the eHccpt iL'n that thl: sur Yci+/- 'aA* e docs r.ot-neea to he pertormed if the battrry has b 0 cn on equal:6r dur=.ng the pr=cv=.ous 4 days . The aadit1ona+/- 4 days allmm time !or batte*y para~ 0 ters tc return te normal after ehc equalize eharae (neffi1nally 3 days) aRa -1me to pcr!0rm the test 1n0Ftinally l dayl . The ir." nt et the ~l o te is : o ,,1 :-aw-orderly , yet premp- psrf9rffinRcc et the survcillanec ~haE 11ill prodaec mean1nqful rcsalts cnee th1: equaliee charae: is complete . The Surv 0 ill~nce Frequeney is eontEellcd under

-he Surveillance Frequ<>ncy CoRtro+/- Program.

Verif y in g batter y float current while on float char g e is used to determine the state of charge of the battery .

Float charge is the condition in which the charger is supplying the continu s us charge required to overcome the internal losses of a battery and maintain the battery in a charged state . The equipment used to monitor float current must have the necessary accuracy and capability to measure electrical currents in the expected range .

The float current requirements arc based on the float current indicative of a charged battery . The Surveillance Frequency is controlled under the Surveillance Frequency Control Program .

(continued)

PBAPS UNIT 3 B 3 . 8-79 Revision No .

Battery ~ Parameters B 3.8.6 BASES SURVEILLANCE SR 3 . 8 . 6.1 REQUIREMENTS (continued) This SR is modified by a Note that states the float current requirement is not required to be met when battery terminal voltage is less than the minimum established float voltage of SR 3 . 8.4.1. When this float voltage is not maintained the Required Actions of LCO 3 . 8.4 ACTION A are being taken , which provide the necessary and appropriate verifications of the battery condition. Furthermore , the float current limit of 2 amps is established based on the nominal float voltage value and is not directly applicable when this voltage is not maintained.

SR 3 . 8.6 . 2 and SR 3.8 . 6.5 The Survei1lan°c Er

queney is eontrollea under the 6urve 11. lancf' f"req-uer.c:y Centro+/- Pr ograFR . In add1tion 1 ., .. : tnin e~ hours of a batter1* di!lcharqe <.. 100 V or *.iithin ,,4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months of a battery ovcrrnarqc > 11~ V1 the bciECery ffiust be dcffic nscEat l j -o ffiret Gau qory H 1 i Fftics. Transients, zu c n as ffintnr scartinq ti ..msients vhieh ffiuy ffiOffientari.y cause buttery ~F1Laae to drsp FG < 100 V, ao not eonsticuer battery discharge prov1dea che battery terffiinal vc _-age and f+/-oat eur¥ent F tdrn to pre transient values.

3 This inspec'Cion is t.lso eons: s:eAL >vi tn +/-6Eio 4j0 (Ref . ?) , Hhicn recoffiffiendn special inspec::ions ~cilo*.ii ng a severe o

s=ha.::-ge or overcharge , to ensurr that ns signirieant dcgraaation or tnc buttery occurs as a eonsequen°r et su "h dise~arge ur O'ierehu rqe .

Optimal long term battery performance is obtained by maintaining a float voltage greater than or equal to the minimum established design limits, which corresponds to 130.5 Vat the battery terminals, or 2 . 25 Vpc. This provides adequate over-potential, which limits the formation of lead sulfate and self discharge, which could eventually render the battery inoperable. Float voltages in this range or less, but greater than 2 . 07 Vpc, are addressed in Specification 5.5.15. SRs 3.8 . 6.2 and 3.8.6.5 require verification that the cell float voltages are equal to or greater than the short term absolute minimum voltage of 2.07 V. The Surveillance Frequency is controlled under The Surveillance Frequency Control Program .

(continued)

PBAPS UNIT 3 B 3.8-79a Revision No.

Battery ee++/-- Parameters B 3.8.6 BASES SURVEILLANCE SR 3.8.6.3 REQUIREMENTS (continued) Thr Furveillan *e Frequrney is controlled under the Surve'llance ~rcqueney Control Program.

T01.*er 'hJn nor!!ial temperatures ael to inhibit er reE'lucc tattzry 0 apa 0 ity. This SR ensures that che operating rempcratuY :s remain *<'iEhi n an acceptable operating rar:i;re-:-

Table 3 . 8 . ~ l DELETED This -able dcl1neotes the Llmits en cleccre1yte levc1 1 fl 0 at vo

cag: , and specific qraviry fer Lhrce differenE catcgor1es .

'hr !'leaning o: eaF?h sa-egory is discussed eclo1.'.

Gateg:ry A ri f-:.nes Eh nonwl paramcLu- limi1 fer each 0

~ated pil9t cell in each battery. ~he cells selecte~

pile- c:ei+/-s ar those 11hose tonperatur._ 1 vo1::agr 1 and e I c,~r rolyEe spe::1 tic grcvity approJtimalt. ':he stare or chd!-q 0 of t:L :rt'rt: e,,ttcry .

The C3t:qery A z1mirs spceifitd for ele *trolyte level arc based nn manufar*-urer ' s r:ooffiffiendarions and arc ronsistcnt "nth rr.c quidanr~s iE Ibb6 4§0 'Rrf. cl , 11ith Ehe entra 1 ! +/-r.ch allm1an°c above th,e hign Hater level ina:cea'.:J:on for orcra*. ng ffiarq+/-n to acef'un_ for tew.perature and eharqe etteets. In aad:rtion to this a+/-lm1an-e, footnote a t-e-iab*e * . 8.e l prrm1ts the clectrolyte +/-CVLl to be above Ehc specif: d ma1!1ffiLiffi level d*1rinq equalizing charge , provided 1:

is no 1

VPrflm1lng. Th"s

limits e surc tl=JE the p:;.aEes 0

suffrr no ph~*9j >"al daffiage, and rhat aarquaEc e+/-eetron transfer capability *n maintained in 'hr event uf trans:rn~

eondit-ions. l5e5 HiiJ 1Pef. 2) reeofflffiends that elestrolyte levrl readings should be made only af.er the battery has been a* fl cat nfiarge zor dt leas* 7? hcur.1 .

ThC' C:H:es<>r y P. li11<it specif'icd tor float voltaqe is > ,

12' V

!'rr ce i. This Vd~Ue is based on the recommendation of ISEE 150 (Ref . ~) 1 i1hiah states that prolonged operdticn of GC~iS f1C lo*.i 2. l *~ \' San t ' Ou CC the ] ife eHpectancy cf cells.

";he *:ateqory l\ : ilfit speeii:ied for spe-ifie gravi ':y i:or Pd:;n pilot cell is> 1 . 195 (0 . 020 belo'd the manutaeturer ' s ful 1 y (continued)

PBAPS UNIT 3 B 3 . 8-80 Revision No .

Battery ~ Parameters B 3.8.6 BASES 2U8VE. T LLP.~1Cb Table 3 . ~ . e l leontin~

REQU:R5ME.~lT8 charged n ominal so~cific qravi~y or ct eatt2ry rnarg'ng current EhJt had scab1l1=ed at a lm1 *;,,luej. Tnis value :.s ehor u cc:eristic e t a charges eel"!. 1Jith ad2quar2 oapacity .

According to ISE.8 450 (Ref . L 1 tne specirie grav*ty !eadings are eased on u tempera*ure of 77 F (2S 0 r) .

The specific aravity read1nqs are ccrrArt=a for actual electrolyte :emperature a nd level . For ra-h 3 12 . el cl above 77 ° F (2:; ° C) , 1 point (0 . 001) io added to the readl*rn ;

-+/--point i::: sutl1acted tor each J°F bel.O'd 77 ° f . ThP speri:'~-e gravity :f the c 1 ctro+/-yl E ln a eel l incr as es 111 t'h a +/-flSS er water db _ to eJ.ectrolysis or evaporation . level .-:orrecti n Hi1+/- be: in aceoi:dance *,11rh manufacturer ' s recommendatior.c .

Gateocry P defines the norffial paraffieter +/-iwits fFr ca::h eonnso*ed Gell. ihc terf!'. " ronneetPd cell " "H'.:zbd 0 r; any hdttery etl 1 that ffiay be JUmpered out .

1Lc c'atcq2:t:y " lifldt'S spcail~ed tor clc:;::ro;ytc .'.."'J*

aFJd t+/-oat voltage are the saffie as those specified for Cdtrgory A and h a ve been discussed above . The C&~cqory B iFRil si=eeifird toL specific- QFavily ~or each ccnf!c1-t-"-d rcll is

" : . 1qc: (0 . 0LO belm1 'he FRanu1acturcr ' s tulJ.y charE1ed ,

nomin.:;1 epeezfie Qravity *n' i'..h the averaqe o: all eonne-tcci eerlu 1.dO~ (0 . 010 below th2 ffianutarturer ' s fuliy 2hJrgsn, nomln -h spce+/-fic qravityJ . These '.'&lues *.:er0 o vclogJOd frsm 0

F.:anu:'.dsturc£ ' b recoffiffirndation:1 . The R'. niff1Uffi .9p<cit::e g r ayi ty value r 0 quir2J fer eaeh cell ensures that the rff2cta r~ a highly rhargrd or ne\1ly ins:ai;ed sell do Rb' ffiask overall drgraaatisn of the oattcry.

Cat 0 gcry - Jc fines the liFRit for each eonne*t e d ~ell. Thes~

"o'alues, a+/-l!.uuqh i* 0 ducea , prov:dc assuranc 0 tnat s1'f1c1 " nt c.:tpilcity ?Lists to pertorm -ne :ntended .t-.i nct:on and !'la1nt u i n

& marqin nf oarety . When 3AY battLry paramstcr s outs19L the Category r 11w1t , the assurance o~ suLr101rn- capa"iry dcocr.:.bed abov 0 no zonger enists, and thn ba . tery w.ust b 3ec+/-crea :noperab+/-e .

The r utcqory ~ lifRlL soeeir.:.ed tor r~ectro yre l vcl ;abt"Vt- 0 thc top of the plat f's and not o v erf. o;; ing) nnsur 0 thcJ t the

~s suffer no pnysieal dawagr and ffiaintujn adequo'"e-

~--t-rrn transfer capability . :'h0 Category C .'\llo*,;dble Val U1' for volro(]C is based on iE.EE> 4'>0 1 Ret. :' 1 o.:h1rh (continued)

PBAPS UNIT 3 B 3.8-81 Revision No .

Battery ~ Parameters B 3.8.6 BASES SOF<VEILLN;ci:; l'ab_t:: l . S . 6 l ieont1nued )

REQUIRbMSN~S stab. s thaE '" cell viltaqe of *' . u I \' or '.r'e_ o.,,., undrr fl oat eondilions and noc eaused by elevated temperature of :he cel1 1 injicatcs inEernar eel+/- problrms and may require erll rep+/-uCC!TICnt .

The Category C li!TliE of average specific gravity > l . 19u , is based on fF.aFiufacturer ' s 1*eeofflfflendat* ens . In additis'l ts thee limit , it is required that the specifir gravity for eceh connected cell n1ust be no less ~han 0 . 0?0 belo*,.. ti'le average of a+/-+/- 20nnccted cel-s . This limit ennures tnat thL effect of a highly charged or ne "1 cell does rnt FRasl< overall degradatiun oi the battery.

The tcot!1(1tcs te Taole ., . 8 . ~ i that apply t 0 sprcifif' gravity are applicanls te Cacego~y A, B, 3Ad G speo1f1c qravity.

toornoce b of Tablo 3 . 8 . e 1 reqJ+/-res tho above wentiqnrd c:orr 0 .:tion for c.'..0cr!'elyte : evel 2nd tompc ra:urr 1 .,,i-h t=hc snseptien that +/-evc:1 correction is nor £FE]Uin'd "'"*CR bJtter:,,

churg1ng CULHT'<E , ;1h1le on f1oai: eharqe , is < 1 3fflp. lh1s current provides, in qeneral, an indicat+/-on of ov0rall bactery r n~+/-tion .

B.cause of sper;'.fic gravity gradients that ars oroauc~

during the rerharging process , delays DE sevrral aays ffiay occur 11h:le *,.*.,iring for the speeit1e grav.:. y ts s"abilizc . :1 71 stabil1red charger current .:.s an aeoeptab _o a:-srnativc to specific gravity measuremenL for delermin+/-ng the state of eharg - cf the desiqnatea pile- ccil. ~his phenoffienon is discussed in 188E q9g (Ref . el . Eeotnore r to Tab:e 3 . 8 . 5 1 alle11s tile flcat charge current to oc used as an alternate ::o specif+/-e qra*;ity tot up te 180 days follo'.dng a battery r charge aftc r a deep disch<>r-ge .

0 Within 180 dayc: CdCh

=Jn11ccted ec. ~ ' s specific qravity ffiUSt' bP ff'Casurrd t'J ~onf+/-...rm.

the state s:E: :hargP . Follmii nq a An nor ba~ :ery re-hartjr (sucL as equal i zing charge that aocs not "' ::..:zo-.; J deep 0

13tseharge I sEJec+/- fie grav' ty ~radients ar- nor signifiean:- ,

<rnd sorninfl.::.ng ffteasurements fftUSc ee ffiude '++'ithin :JO days .

(continued)

PBAPS UNIT 3 8 3.8-82 Revision No.

Battery ~ Parameters B 3.8.6 BASES SURVEILLANCE SR 3.8.6.3 REQUIREMENTS (continued) The limit specified for electrolyte level ensures that the plates suffer no physical damage and maintains adequate electron transfer capability . The minimum design electrolyte level is the minimum level indication mark on the battery cell jar . The Surveillance Frequency is controlled under The Surveillance Fre q uenc y Control Pro g ram .

SR 3 . 8 . 6 . 4 This Surveillance verifies that the pilot cell temperature is greater than or equal to the minimum established design limit (i . e ., 50°F . Pilot cell electrolyte temperature is maintained above this temperature to assure the battery can provide the required current and voltage to meet the design requirements . Temperatures lower than assumed in battery sizing calculations act to inhibit or reduce battery capacity . The Surveillance Frequency is controlled under The Surveillance Frequency Control Program .

SR 3 . 8 . 6 . 6 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 by the acceptance test . The test is intended to determine overall battery degradation due to age and usage .

Either the battery performance discharge test or the modified performance discharge test is acceptable for satisfying SR 3 . 8 . 6 . 6 ; however , only the modified performance discharge test may be used to satisfy the battery service test requirements of SR 3 . 8 . 4 . 7 .

A modified discharge test is a test of the battery cap acit y and its abilit y to p rovide a hi gh rate ~hort duration load (usually the highest rate of the duty cycle) . This will often confirm the battery ' s ability t o meet the critical period 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 .

(continued)

PBAPS UNIT 2 B 3 . 8-82a Revision No .

Battery ~ Parameters B 3.8.6 BASES SURVEILLANCE SR 3 . 8 . 6 . 6 (continued)

REQUIREMENTS It may consist of just two rates ; for instance , the one minute rate for the battery or the largest current load of the duty cycle , followed by the test rate employed for the performance test , both of which envelope the duty cycle of the service test . Since the ampere-hours removed by a one minute discharge represents a very small portion of the battery capacity , the test rate can be changed to that for the performance test without compromising the results of the performance discharge test . The battery terminal voltage for the modified performance discharge test must 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 .

The acceptance criteria for this Surveillance are consistent with IEEE-450 (Ref . 2) and IEEE-485 (Ref . 4 .

These references recommend 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 : f deterioration is increasing , even if there is ample capacity to meet the load requirements . Furthermore , the battery is sized to meet the assumed duty cycle loads when the battery design capacity reaches this 80 limit .

The Frequency for this test is in accordance with The Frequency Control Program . If the battery shows degradation , or if the battery has reached 85 of its

~xpected life and caoacity is < 100 of the manufacturer ' s rating , the Surveillance Frequency is reduced to 12 months . However , 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 manufacturer ' s rating . Degradation is indicated ,

according to IEEE-450 (Ref . 2) , when the battery capacity drops by more than 10 ' relative to its capacity on the previous performance test or when it i~ below the manufacturer ' s rating . All these Frequencies are consistent with the recommendations in IEEE-450 (Ref . 2) .

This SR is modified by a Note . The reason for the Note is that performing the Surveillance would remove a required DC electrical power subsystem from service ,

perturb the electrical distribution system , and challenge safety systems .

(continued)

PBAPS UNIT 3 B 3 . 8-82b Revision No .

Battery ~ Parameters B 3.8.6 BASES REFERENCES 1. UFSAR, Chapter 14.

2. IEEE Standard 450, ~2002 .

3. UFSAR , Chapter 8 .

4. IEEE Standard 485 , 1983 .

PBAPS UNIT 3 B 3 . 8-82c Revision No .

ATTACHMENT 4 Summary of Regulatory Commitments Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278

SUMMARY

OF REGULATORY COMMITMENTS The following table identifies commitments made in this document. (Any other actions discussed in the submittal represent intended or planned actions. They are described to the NRC for the NRC's information and are not regulatory commitments.)

COMMITMENT TYPE COMMITTED DATE ONE-TIME COMMITMENT PROGRAMMATIC OR "OUTAGE" ACTION (Yes/No)

(Yes/No)

No Yes The 2 amp float current value is an Upon implementation indication that the battery is 98 of the approved TS percent charged. PBAPS is amendment.

committed to maintain a 5 percent design margin for the batteries.

The Battery Monitoring and Upon implementation No Yes Maintenance Program, which will of the approved TS be contained in the PBAPS amendment.

Technical Requirements Manual will require verification of the selection of the pilot cell or cells when performing SR 3.8.6.5.

EGC will revise the PBAPS Upon implementation Yes No Updated Final Safety Analysis of the approved TS Report in accordance with amendment. , List of Required Updated Final Safety Analysis Report (UFSAR) Descriptions

ATTACHMENT 5 List of Required Updated Final Safety Analysis Report (UFSAR) Descriptions Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-2n and 50-278

LIST OF REQUIRED UPDATED FINAL SAFETY ANALYSIS REPORT (UFSAR) DESCRIPTIONS The following table identifies UFSAR descriptions required by EGG as part of the adoption of TSTF-500, Revision 2 for Peach Bottom Atomic Power Station.

Required UFSAR Descriptions DUE DATE I EVENT

1. Describes how a 5 percent design margin for the Upon implementation of the approved batteries corresponds to 2 amp float current value , for Technical Specification amendment the station batteries, indicating the batteries are 98 percent charged.

2. States that long term battery performance is Upon implementation of the approved supported by maintaining a float voltage greater than or Technical Specification amendment equal to the minimum established design limits provided by the battery manufacturer, which corresponds to 2.25 V per connected cell and that there are 58 connected cells in the battery, which corresponds to 130.5 V at the battery terminals.

3. Describes how the batteries are sized with Upon implementation of the approved correction margins that include temperature and aging Technical Specification amendment and how these margins are maintained.

4. States the minimum established design limit for Upon implementation of the approved battery terminal float voltage. Technical Specification amendment

5. States the minimum established design limit for Upon implementation of the approved electrolyte level. Technical Specification amendment

6. States the minimum established design limit for Upon implementation of the approved electrolyte temperature. Technical Specification amendment

7. Describes how each battery is designed with Upon implementation of the approved additional capacity above that required by the design Technical Specification amendment duty cycles to allow for temperature variations and other factors.

8 . Deocribes normal DC system operation (i.e., Upon implementation of the approved powered from the battery chargers) with the batteries Technical Specification amendment floating on the system, and a loss of normal power to the battery charger describing how the DC load is automatically powered from the station batteries.

ATTACHMENTS PBAPS DC System Simplified Diagram Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278

Peach Bottom Atomic Power Station-Unit 2 2A 2C Each Battery consists 2B 20 of 58 cells connected in series -- 125 voe 125/250VOC 125/250VDC Batte:X Charger Batte~Ch~r Pane 2C0003 Pane 20 3 Battery Charger EMERGENCY Batte~Cha~r Panel 2AD003 Pane 280 3 MCCs 20A-W-A

~

RCIC 20012 I I I I EMERGENCY MCCs 208-A-B I I I HPCI EMERGENCY MCCs I SPARE I EMERGENCY MC Cs I I 20011 Static Inverter 20037 2PPA 2PPC 2 PPB 125 voe 2PPO 125 voe 20021 20023 20022 20024 DIVISION I DIVISION II 2PPB 2B0306 MBT == Manual Bus Transfer switch RCIC == Reactor Core Isolation Cooling HPCI == High Pressure Core Injection SINGLE LINE DIAGRAM OF 125/250 voe SAFEGUARD DISTRIBUTION SYSTEM (UNIT 2)

ATTACHMENT 7 PBAPS 4kV Emergency Bus System Cross Ties Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278

EDGs El AND E2 / 4KV SYSTEM CROSSTIES AND ALTERNATE POWER SUPPLIES

fROW Mee 208011 INON*OI UNIT 3 411V IWOR !. . . 41tY IWOR

+

BC

~ 3AD003 DIV*I DIV*ll ~ 110001 IADD01 110001 IADDOt HDOOI

- tADOOI UNIT I 1' 1' Ell EU 41tV IWGR i

I

["'"* i 41tV IWGft i

I A

e WAINTINANeE/THTING POWlll 80UlleE A'P*NDIJI R 4 )

fllOW wee 101011 I ~ I

- now wee eoaoeo POWlll 80UlleE wee 10*0** MCC 108010 I

1, FIGURE F3.l-l Peach Bottom Atomic Power Station, Units 2 and 080 No. P S*OlA 125/250vOC And 24/48vOC System Revision No. 14 F3.l*l, Page l of l

EDGs E3 AND E4 / 4KV SYSTEM CROSSTIES AND ALTERNATE POWER SUPPLIES A FROM MCC 008041

FROM MCC 201019 INON*OI

! A FROM MCC 008010 EH EU OY IWGll 1 IOl100 UNIT I EU

+

UMIT I 1'

- ICDHI DIV*I DIV*ll 1'

["""

EH Ut 411V 8WOA I OY IWGR I A MAINTENANCEITEITING l l

~ ~

POWEii IOURCI

*11011 llCC IHOIO I APPlllDIX 11 INON*OI POWEii IOURCE J MCC MCC )

tolOll toHH FIGURE F3.1-2 Peach Bottom Atomic Power Station, Units 2 and DBD No. P*S-OlA 125/250vDC And 24/4BvDC System Revision No. 14 F3.1

2, Page 1 of 1

ATTACHMENT 8 Conceptual Alternate Battery Charger Diagram Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278

Attachment 8 Conceptual Alternate Battery Charger Diagram 2B 2B 20 2A 2A 2C 2C Battery Charger Charger Battery Charger Charger Battery Existing Existing Fuse Fuse ------.

Boxes Boxes e

2B0019 2AD019 t - - - - --1 480VAC L. N~~. 1 UNIT2

Attachment 8 Conceptual Alternate Battery Charger Diagram 3B 30 30 3A 3A 3C Charger Charger Battery Battery Charger Charger Existing Existing 3BD017 Fuse --- .1300017 Fuse - - - - - _ 13CD017

~--

Boxes Boxes 3BD019 1 - - - ---l Fuse Fuse Fuse Box Box Box Safety Related Non-Safety Related 125 voe Alternate 480 VAC I ~ I Battery Charger Load Bank

~

UNIT 3

ATTACHMENT9 PBAPS Technical Requirements Manual Section 3.21 Markup Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278

Battery Monitoring and Maintenance Program 3.21 3.21 BATTERY MONITORING AND MAINTENANCE PROGRAM TAMS 3.21 Battery and Battery Cell Parameters and Test Requirement Criteria shall be met.

APPLICABILITY: When associated Battery is required to be OPERABLE by TS.

COMPENSATORY MEASURES

NOTE-------------------------------------------------------

Separate Condition entry is allowed for each battery.

CONDITION REQUIRED COMPENSATORY COMPLETION MEASURE TIME A. One or more batteries A.1 Verify other battery cells 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months with one or more battery in affected battery are cell do not meet Table within Table 3.21-1 3.21-1 Category A Float parameters.

Voltage.

AND A.2 Verify battery cell meets 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Table 3.21-1 Category B limit. AND Once per 7 days thereafter AND B.2 Restore battery cell 31 days parameters to Category A limit of Table 3.21-1.

B. Required Compensatory B.1 Initiate a Condition Immediately Measure and associated Report to perform Completion Time of corrective actions in Condition A not met. accordance with the Battery Monitoring and Maintenance Program.

(continued) .

PBAPS UNIT 2 3.21-1 Revision 0

Battery Monitoring and Maintenance Program 3.21 CONDITION REQUIRED COMPENSATORY COMPLETION MEASURE TIME

c. One or more batteries C.1 Verify battery cell meets 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months with one or more battery Table 3.21-1 Category cells do not meet Table B limit.

3.21-1 Category A Electrolyte Level. AND C.2 Restore battery cell 7 days parameters to Category A limit of Table 3.21-1.

D. Required Compensatory D.1 Equalize and test battery 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months Measure and associated cell(s)

Completion Time of Required Action C.1 not met.

E. Required Compensatory E.1 Initiate a Condition Immediately Measure and associated Report to perform Completion Time of corrective actions in Required Action C.2 not accordance with the met. Battery Monitoring and Maintenance Program.

(continued)

PBAPS UNIT 2 3.21-2 Revision 0

Battery Monitoring and Maintenance Program 3.21 CONDITION REQUIRED COMPENSATORY COMPLETION MEASURE TIME F. One or more batteries F.1 Verify battery cell meets 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months with one or more battery Table 3.21-1 Category cell do not meet Table B limit.

3.21-1 Category A specific gravity.

AND F.2 Restore battery cell 7 days parameters to Category A limit of Table 3.21-1.

G. Required Compensatory G.1 Initiate a Condition Immediately Measure and associated Report to perform Completion Time of corrective actions in Condition F not met. accordance with the Battery Monitoring and Maintenance Program.

H. TAMS not met for H.1 Initiate a Condition Immediately reasons other than Report to perform Condition A, C or F or corrective actions in Compensatory Measure accordance with the and Completion Time Battery Monitoring and not met. Maintenance Program.

PBAPS UNIT 2 3.21-3 Revision 0

Battery Monitoring and Maintenance Program 3.21 TEST REQUIREMENTS TEST FREQUENCY TR 3.21.1 Verify battery terminal voltage is~ 123.5 V on -----NOTE------

float charge. The 7 day Frequency is not applicable if the battery is on equalize charge or has been on equalize charge at any time during the previous 1 day.

7 days AND 14 days TR 3.21.2 Verify battery cell parameters meet Table 3.21-1 -----NOTE------

Category A limits. The 7 day Frequency is not applicable if the battery is on equalize charge or has been on equalize charge at any time during the previous 4 days.

7 days AND 14 days (continu ed)

PBAPS UNIT 2 3.21-4 Revision 0

Battery Monitoring and Maintenance Program 3.21 TEST REQUIREMENTS (continued)

TEST FREQUENCY TR 3.21.3 Verify battery cell parameters meet Table 92 days 3.8.6-1 Category B limits.

TR 3.21.4 Verify battery connection resistance is $ 40 E-6 12 months ohms.

TR 3.21.5 Verify Battery Room temperature is < 1oo°F 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months and ventilation is in service.

TR 3.21.6 Verify average electrolyte temperature of 10% 92 days of (representative) cells is~ so°F.

TR 3.21.7 Verify adequate appearance, cleanliness of 31 days the battery rack and area including the existence of any cell cracks or electrolyte leakage and any evidence of corrosion of terminals, connectors or racks.

TR 3.21.8 Verify no unintentional battery grounds. 31 days TR 3.21.9 Verify battery monitoring system is functional. 31 days TR 3.21.10 Verify battery cells meet the specific gravity During requirements based on manufacturer's performance of recommendations. discharge test required by TS SR 3.8.4.6 (continued)

PBAPS UNIT 2 3.21-5 Revision 0

Battery Monitoring and Maintenance Program 3.21 TEST REQUIREMENTS (continued)

TEST FREQUENCY TR 3.21.11 Verify acceptable specific gravity and 12 months temperature of each cell.

TR 3.21.12 Verify acceptable condition of battery cells in 12 months accordance with manufacturer's recommendations and the Battery Monitoring and Maintenance Program TR 3.21.13 Verify acceptable cell-to-cell and terminal 12 months connection resistance in accordance with the Battery Monitoring and Maintenance Program TR 3.21.14 Verify acceptable structural condition of the 12 months battery rack in accordance with the Battery Monitoring and Maintenance Program.

UNIT 2 PBAPS UNIT 2 3.21-6 Revision 0

Battery Monitoring and Maintenance Program 3.21 Table 3.21-1 (page 1 of 1)

Battery Cell Parameter Requirements CATEGORY A: CATEGORYB:

LIMITS FOR EACH LIMITS FOR EACH DESIGNATED PILOT CELL CONNECTED CELL PARAMETER Electrolyte Level > Minimum level indication mark, > Minimum level indication mark, and :::; Y2 inch above maximum and :::; Y2 inch above maximum level indication mark(a) level indication mark(a)

Float Voltage ~ 2.13 v .:::. 2.13 v Specific ~ 1.195 ~ 1.195 Gravity(b)(c)

AND Average of all connected cells

> 1.205 (a) It is acceptable for the electrolyte level to temporarily increase above the specified maximum level during equalizing charges provided it is not overflowing.

(b) Corrected for electrolyte temperature and level. Level correction is not required, however, when on float charge and battery charging current is < 1 amp.

(c) A battery charging current of< 1 amp when on float charge is acceptable for meeting specific gravity limits following a battery recharge for: 1) a maximum of 30 days if a deep discharge did not occur; and 2) a maximum of 180 days if a deep discharge did occur. When charging current is used to satisfy specific gravity requirements, specific gravity of each connected cell shall be measured prior to the expiration of the applicable allowance.

PBAPS UNIT 2 3.21-7 Revision 0

Battery Monitoring and Maintenance Program B 3.21 B 3.21 Battery Monitoring and Maintenance Program BASES TS 5.5.14 requires that a Battery Monitoring and Maintenance Program be established to ensure proper battery restoration and maintenance. The program is in accordance with IEEE 450-2002, "IEEE Recommended Practice for Maintenance, Testing and Replacement of Vented Lead-Acid Batteries for Stationary Applications". IEEE 450-22002 is endorsed by the NRC by virtue of NRG RG 1.129, Rev. 2, "Maintenance, Testing and Replacement of Vented Lead-Acid Batteries for Nuclear Power Plants".

The program allows for the following exceptions:

1. The battery temperature correction may be performed before or after concluding discharge tests.

2. RG 1.129, Regulatory Position 1, Subsection 2, "References" is not applicable to this program

3. In lieu of RG 1.129, Regulatory Position 2, Subsection 5.2, "Inspection", the following shall be used: "Where reference is made to the pilot cell, pilot cell selection shall be based on the lowest voltage cell in the battery."

4. In RG 1.129, Regulatory Position 3, Subsection 5.4.1, "State of Charge Indicator," the following statements in paragraph 9d) may be omitted: "When it has been recorded that the charging current has stabilized at the charging voltage for three consecutive hourly measurements, the battery is near full charge. These measurements shall be made after the initially high charging current decreases sharply and the battery voltage rises to approach the charger output voltage."

5. In lieu of RG 1.129, Regulatory Position 7, Subsection 7.6, "Restoration", the following may be used: "Following the test, record the float voltage of each cell of the string."

Other RG 1.129 NRC positions (Positions 4, 5, 6 and 8) apply.

COMPENSATORY MEASURES:

When the TRM references in the COMPENSATORY MEASURES that corrective actions must be taken in accordance with the Battery Monitoring and Maintenance Program, section 5.3 and Annexes C, D and F of IEEE 450-2002 must also be utilized as applicable.

(continued)

PBAPS UNIT 2 B 3.21-1 Revision O

Battery Monitoring and Maintenance Program B 3.21 BASES (continued)

TEST REQUIREMENTS:

When implementing TEST REQUIREMENTS, the contents of the surveillances and maintenance shall meet IEEE-450-2002 (with noted exceptions above).

TEST REQUIREMENTS FREQUENCY:

Because the testing and maintenance of batteries must be in accordance with IEEE-450-2002 (as modified by RG 1.129 and TS 5.5.14), the frequencies of the applicable TRs may not be changed without a license amendment. Some test frequencies are more than required by IEEE-450-2002 since they were relocated from the former requirements in TS 3.8.4 I 3.8.6. These frequencies may be changed using 10CFR 50.59 as long as the IEEE-450-2002 frequencies are not exceeded.

PBAPS UNIT 2 B 3.21-2 Revision 0

Battery Monitoring and Maintenance Program 3.21 3.21 BATTERY MONITORING AND MAINTENANCE PROGRAM TRMS 3.21 Battery and Battery Cell Parameters and Test Requirement Criteria shall be met.

APPLICABILITY: When associated Battery is required to be OPERABLE by TS.

COMPENSATORY MEASURES

NOTE-------------------------------------------------------

Separate Condition entry is allowed for each battery.

CONDITION REQUIRED COMPENSATORY COMPLETION MEASURE TIME A. One or more batteries A.1 Verify other battery cells 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months with one or more battery in affected battery are cell do not meet Table within Table 3.21-1 3.21-1 Category A Float parameters.

Voltage.

AND A.2 Verify battery cell meets 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months Table 3.21-1 Category B limit. AND Once per 7 days thereafter AND B.2 Restore battery cell 31 days parameters to Category A limit of Table 3.21-1.

B. Required Compensatory B.1 Initiate a Condition Immediately Measure and associated Report to perform Completion Time of corrective actions in Condition A not met. accordance with the Battery Monitoring and Maintenance Program.

(continued)

PBAPS UNIT 3 3.21-1 Revision 0

Battery Monitoring and Maintenance Program 3.21 CONDITION REQUIRED COMPENSATORY COMPLETION MEASURE TIME

c. One or more batteries C.1 Verify battery cell meets 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months with one or more battery Table 3.21-1 Category cells do not meet Table B limit.

3.21-1 Category A Electrolyte Level. AND C.2 Restore battery cell ?days parameters to Category A limit of Table 3.21-1.

D. Required Compensatory D.1 Equalize and test battery 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months Measure and associated cell(s)

Completion Time of Required Action C.1 not met.

E. Required Compensatory E.1 Initiate a Condition Immediately Measure and associated Report to perform Completion Time of corrective actions in Required Action C.2 not accordance with the met. Battery Monitoring and Maintenance Program.

(continued)

PBAPS UNIT 3 3.21-2 Revision 0

Battery Monitoring and Maintenance Program 3.21 CONDITION REQUIRED COMPENSATORY COMPLETION MEASURE TIME F. One or more batteries F.1 Verify battery cell meets 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months with one or more battery Table 3.21-1 Category cell do not meet Table B limit.

3.21-1 Category A specific gravity.

AND F.2 Restore battery cell 7 days parameters to Category A limit of Table 3.21-1.

G. Required Compensatory G.1 Initiate a Condition Immediately Measure and associated Report to perform Completion Time of corrective actions in Condition F not met. accordance with the Battery Monitoring and Maintenance Program.

H. TAMS not met for H.1 Initiate a Condition Immediately reasons other than Report to perform Condition A, C or F or corrective actions in Compensatory Measure accordance with the and Completion Time Battery Monitoring and not met. Maintenance Program.

PBAPS UNIT 3 3.21-3 Revision 0

Battery Monitoring and Maintenance Program 3.21 TEST REQUIREMENTS TEST FREQUENCY TR 3.21.1 Verify battery terminal voltage is~ 123.5 V on -----NOTE------

float charge. The 7 day Frequency is not applicable if the battery is on equalize charge or has been on equalize charge at anytime during the previous 1 day.

7 days AND 14 days TR 3.21.2 Verify battery cell parameters meet Table 3.21-1 -----NOTE------

Category A limits. The 7 day Frequency is not applicable if the battery is on equalize charge or has been on equalize charge at any time during the previous 4 days.

7 days AND 14 days (continu ed)

PBAPS UNIT 3 3.21-4 Revision O

Battery Monitoring and Maintenance Program 3.21 TEST REQUIREMENTS (continued)

TEST FREQUENCY TR 3.21.3 Verify battery cell parameters meet Table 92 days 3.8.6-1 Category B limits.

TR 3.21.4 Verify battery connection resistance is s. 40 E-6 12 months ohms.

TR 3.21.5 Verify Battery Room temperature is < 1oo°F 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months and ventilation is in service.

TR 3.21.6 Verify average electrolyte temperature of 10% 92 days of (representative) cells is~ 50°F.

TR 3.21.7 Verify adequate appearance, cleanliness of 31 days the battery rack and area including the existence of any cell cracks or electrolyte leakage and any evidence of corrosion of terminals, connectors or racks.

TR 3.21.8 Verify no unintentional battery grounds. 31 days TR 3.21.9 Verify battery monitoring system is functional. 31 days TR 3.21.10 Verify battery cells meet the specific gravity During requirements based on manufacturer's performance of recommendations. discharge test required by TS SR 3.8.4.6 (continued)

PBAPS UNIT 3 3.21-5 Revision 0

Battery Monitoring and Maintenance Program 3.21 TEST REQUIREMENTS (continued)

TEST FREQUENCY TR 3.21.11 Verify acceptable specific gravity and 12 months temperature of each cell.

TR 3.21.12 Verify acceptable condition of battery cells in 12 months accordance with manufacturer's recommendations and the Battery Monitoring and Maintenance Program TR 3.21.13 Verify acceptable cell-to-cell and terminal 12 months connection resistance in accordance with the Battery Monitoring and Maintenance Program TR 3.21.14 Verify acceptable structural condition of the 12 months battery rack in accordance with the Battery Monitoring and Maintenance Program.

PBAPS UNIT 3 3.21-6 Revision 0

Battery Monitoring and Maintenance Program 3.21 Table 3.21-1 (page 1of1)

Battery Cell Parameter Requirements CATEGORY A: CATEGORYB:

LIMITS FOR EACH LIMITS FOR EACH DESIGNATED PILOT CELL CONNECTED CELL PARAMETER Electrolyte Level > Minimum level indication mark, > Minimum level indication mark, and ::;; Y2 inch above maximum and ::;; Y2 inch above maximum level indication mark(a) level indication mark(a)

Float Voltage ~ 2.13 v ~ 2.13 v Specific ~ 1.195 ~ 1.195 Gravity(b)(c)

AND Average of all connected cells

> 1.205 (a) It is acceptable for the electrolyte level to temporarily increase above the specified maximum level during equalizing charges provided it is not overflowing.

(b) Corrected for electrolyte temperature and level. Level correction is not required, however, when on float charge and battery charging current is < 1 amp.

(c) A battery charging current of< 1 amp when on float charge is acceptable for meeting specific gravity limits following a battery recharge for: 1) a maximum of 30 days if a deep discharge did not occur; and 2) a maximum of 180 days if a deep discharge did occur. When charging current is used to satisfy specific gravity requirements, specific gravity of each connected cell shall be measured prior to the expiration of the applicable allowance.

PBAPS UNIT 3 3.21-7 Revision 0

Battery Monitoring and Maintenance Program B 3.21 B 3.21 Battery Monitoring and Maintenance Program BASES TS 5.5.14 requires that a Battery Monitoring and Maintenance Program be established to ensure proper battery restoration and maintenance. The program is in accordance with IEEE 450-2002, "IEEE Recommended Practice for Maintenance, Testing and Replacement of Vented Lead-Acid Batteries for Stationary Applications". IEEE 450-22002 is endorsed by the NRG by virtue of NRG RG 1.129, Rev. 2, "Maintenance, Testing and Replacement of Vented Lead-Acid Batteries for Nuclear Power Plants".

The program allows for the following exceptions:

1. The battery temperature correction may be performed before or after concluding discharge tests.

2. RG 1.129, Regulatory Position 1, Subsection 2, "References" is not applicable to this program

3. In lieu of RG 1.129, Regulatory Position 2, Subsection 5.2, "Inspection", the following shall be used: "Where reference is made to the pilot cell, pilot cell selection shall be based on the lowest voltage cell in the battery."

4. In RG 1.129, Regulatory Position 3, Subsection 5.4.1, "State of Charge Indicator," the following statements in paragraph 9d) may be omitted: "When it has been recorded that the charging current has stabilized at the charging voltage for three consecutive hourly measurements, the battery is near full charge. These measurements shall be made after the initially high charging current decreases sharply and the battery voltage rises to approach the charger output voltage."

5. In lieu of RG 1.129, Regulatory Position 7, Subsection 7.6, "Restoration", the following may be used: "Following the test, record the float voltage of each cell of the string."

Other RG 1.129 NRC positions (Positions 4, 5, 6 and 8) apply.

COMPENSATORY MEASURES:

When the TAM references in the COMPENSATORY MEASURES that corrective actions must be taken in accordance with the Battery Monitoring and Maintenance Program, section 5.3 and Annexes C, D and F of IEEE 450-2002 must also be utilized as applicable.

(continued)

PBAPS UNIT 3 B 3.21-1 Revision O

Battery Monitoring and Maintenance Program B 3.21 BASES (continued)

TEST REQUIREMENTS:

When implementing TEST REQUIREMENTS, the contents of the surveillances and maintenance shall meet IEEE-450-2002 (with noted exceptions above).

TEST REQUIREMENTS FREQUENCY:

Because the testing and maintenance of batteries must be in accordance with IEEE-450-2002 (as modified by RG 1.129 and TS 5.5.14), the frequencies of the applicable TRs may not be changed without a license amendment. Some test frequencies are more than required by IEEE-450-2002 since they were relocated from the former requirements in TS 3.8.4 I 3.8.6. These frequencies may be changed using 10CFR 50.59 as long as the IEEE-450-2002 frequencies are not exceeded.

PBAPS UNIT 3 B 3.21-2 Revision 0

Enclosure 1 Letter from Jan G. Reber, Director of Assembly Engineering, Enersys to Dipen Patel, System Engineer, Peach Bottom Atomic Power Station, Re:

Stabilized Float Current for Enersys GN Batteries,"

dated March 31, 2017.

Peach Bottom Atomic Power Station Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 Docket Nos. 50-277 and 50-278

Enersys P.O. Box 14145 Reading, PA 19612-4145 610 208-1680 Fax 610-208-1971 Email: jan.reber@enersys com www.enersvs.com Jan G. Reber Director of Assembly Engineering North America 3/31/17 Dipen Patel System Engineer Peach Bottom Atomic Power Station 1848 Lay Road Delta, PA 17314 Re: Stabilized Float Current for EnerSys GN Batteries

Dear Mr. Patel,

Enersys confirms that a stabilized float current is a necessary condition to determine if a battery has achieved a full state of charge. This value, however, is a variable of battery size and float voltage. It is also dependant on temperature and to a lesser degree on battery age 9nd manufacturing process variation. Due to the asymptotic nature of the charge current to state of charge relationship, Enersys states that there exists a float current value that can be selected for each battery type that, given no other extraneous conditions, can be used to justify that the monitored battery has achieved more than a particular state of charge . It would be ideal to develop this value for each Individual battery specifically. However, given the limits of 2.25 VPC nominal string average cell voltage and an average 72-80°F battery temperature, a reasonable estimate of the capacity returned to the battery can be made based on a particular float current by battery type. This value is referenced to the full charge capacity that the battery is capable of at the time the measurement is taken . With the above stipulations as prerequ isites, it can be reasonably assumed that when the float current is less than or equal to a 2-amp threshold the GN-23 station batteries located at Peach Bottom APS will have achieved a nominal returned capacity of at least 98 percent. At a float current of less than or equal to 1-amp the GN-23 batteries are expected to have achieved a nominal returned capacity of at least 99 percent.

These values are expected to be valid for the service life of the batteries . Note: this evaluation requires that a positive float current is verified, i.e. that the battery has not been opened, resulting in zero float current.

If you have any questions regarding this letter, please contact me.

Sincerely, Jan G. Reber Cc: File 352, S. Vechy, B. Ross

v t e Letter Sequence Request
EPID:L-2017-LLA-0312, TSTF-500, TSTF-425, TSTF-360 (Approved, Closed)
Initiation Request Acceptance Supplement, Supplement Administration Questions 14 August 2018 28 August 2018 Answers 14 September 2018 Results Approval Other:
MONTHYEAR2018-08-14 [Table View]

ML17275A069

Text

Subject:

Subject:

1.0 DESCRIPTION

3.0 REGULATORY ANALYSIS

5.0 ENVIRONMENTAL CONSIDERATION

6.0 REFERENCES

1.0 DESCRIPTION

3.0 REGULATORY ANALYSIS

5.0 ENVIRONMENTAL CONSIDERATION

6.0 REFERENCES

8.6 REFERENCES

SUMMARY

Dear Mr. Patel,

Navigation menu

Search