ML13002A197

License Amendment Request for Adoption of Technical Specifications Task Force (TSTF) Traveler TSTF-500, Revision 2, DC Electrical Rewrite - Update to TSTF-360

ML13002A197
Person / Time
Site:	Palo Verde
Issue date:	12/26/2012
From:	Mims D Arizona Public Service Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
102-06640- DCM/RKR/CJS
Download: ML13002A197 (85)

Text

10 CFR 50.90 Z A M A subsidiary of Pinnacle West Capital Corporation Dwight C. Mims Mail Station 7605 Palo Verde Nuclear Senior Vice President Tel. 623-393-5403 P. 0. Box 52034 Generating Station Nuclear Regulatory and Oversight Fax 623-393-6077 Phoenix, Arizona 85072-2034 102-06640- DCM/RKR/CJS December 26, 2012 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Units 1, 2, and 3 Docket Nos. STN 50-528, 50-529, and 50-530 License Amendment Request for Adoption of Technical Specifications Task Force (TSTF) Traveler TSTF-500, Revision 2, DC Electrical Rewrite - Update to TSTF-360 In accordance with the provisions of Title 10 of the Code of Federal Regulations (10 CFR) Section 50.90, Arizona Public Service Company (APS) is submitting a request for amendment of the PVNGS Units 1, 2, and 3 Technical Specifications (TSs) to incorporate the NRC-approved TSTF-500, Revision 2, DC Electrical Rewrite

- Update to TSTF-360. provides a description and assessment of the proposed changes including the requested confirmation of applicability and plant-specific verifications, technical analyses, regulatory analyses, and environmental considerations. Attachment 2 provides a list of the required Updated Final Safety Analysis Report (UFSAR) descriptions. Attachment 3 provides markup pages of existing TSs and TS Bases to show the proposed changes. Attachment 4 provides revised (clean) TS pages.

APS requests approval of the proposed license amendment within one year of the date of this letter, to be implemented within 180 days of approval of the amendment.

Verification items 1 and 5 in Section 2.2 of Attachment 1 are considered to be one-time actions that have been completed. Verification items 2, 3, and 7 are considered to be ongoing mandated licensing basis requirements and, therefore, have been incorporated in the proposed TS Bases for the related Surveillance Requirements. Verification items 4 and 6 are considered to be requirements of the proposed TS 5.5.19, Battery Monitoring and Maintenance Program. APS commits to change or verify the UFSAR descriptions listed in Attachment 2 to this letter, consistent with the model application A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

• Comanche Peak - Diablo Canyon

• Palo Verde

• San Onofre o South Texas

• Wolf Creek

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission License Amendment Request for Adoption Of Technical Specifications Task Force (TSTF)

Traveler TSTF-500, Revision 2, DC Electrical Rewrite - Update to TSTF-360 Page 2 referenced in the TSTF-500 notice of availability in the September 1, 2011, Federal Register (76 FR 54510).

The following additional commitment is being made to the NRC in this letter, as described in item number 4 under section 2.1 in Attachment 1:

In order to be consistent with PVNGS TS Amendment No. 188 and Revision 4 of NUREG-1432, upon implementation of the approved TSTF-500 TS amendment, the surveillance frequencies and their bases shown in TSTF-500, Revision 2, for the LCO 3.8.4 and 3.8.6 SRs, except for the frequencies that are related to specific conditions such as battery degradation and capacity, will be specified in the Surveillance Frequency Control Program required by TS 5.5.18.

In accordance with the PVNGS Quality Assurance Program, the Plant Review Board and the Offsite Safety Review Committee have reviewed and concurred with the proposed amendment. By copy of this letter, this license amendment request is being forwarded to the Arizona Radiation Regulatory Agency (ARRA) pursuant to 10 CFR 50.91 (b)(1).

Should you need further information regarding this LAR, please contact Robert K.

Roehler, Licensing Section Leader, at (623) 393-5241.

I declare under penalty of perjury that the foregoing is true and correct.

Executed on

~O2 (date)

Sincerell DCM/RKR/CJS

Enclosure:

Letter from Battery Manufacturer Verifying the Acceptability of Using Float Current Monitoring Attachments:

1.

Description and Assessment of the Proposed Changes for TSTF-500

2.

List of Required Updated Final Safety Analysis Report (UFSAR)

Descriptions.

3.

Markup Pages of Existing TSs and TS Bases

4.

Revised (Clean) TS Pages

ATTN: Document Control Desk U.S. Nuclear Regulatory Commission License Amendment Request for Adoption Of Technical Specifications Task Force (TSTF)

Traveler TSTF-500, Revision 2, DC Electrical Rewrite - Update to TSTF-360 Page 3 cc:

E. E. Collins Jr.

L. K. Gibson M. A. Brown A. V. Godwin T. Morales NRC Region IV Regional Administrator NRC NRR Project Manager NRC Senior Resident Inspector for PVNGS Arizona Radiation Regulatory Agency (ARRA)

Arizona Radiation Regulatory Agency (ARRA)

Enclosure Letter from Battery Manufacturer Verifying the Acceptability of Using Float Current Monitoring

INDUSTRIAL POWER 13 June 2012 Float Current Monitoring From: Robert J. Schmitt Product Manager To:

Mr. Robert Doyle CC:

Mr. Archie Bell, NLI Senior Electrical Engineer Mr. Michael Berger, GNB Palo Verde NGS Mr. Kwok Chan, GNB GNB's position on the use of float current measurements to determine the state of charge of flooded stationary lead-calcium batteries is as follows:

The concept of utilizing float current levels of a flooded, stationary string battery to determine a state of charge throughout the life of the battery is reasonable. However, it is the user's responsibility to establish the value of float current at which the battery is capable of performing its design function and is operable.

There is a relationship between percentage of ampere-hours returned following a successful discharge capacity test and battery state of charge.

The charge current of each battery and can be affected by impurity levels, age, operating environment and maintenance history.

The battery should be maintained in accordance to GNB Installation and Operating Instructions section 93.10, latest edition or IEEE450-2002.

I hope this addresses your concerns on this matter and that you will contact me with any further questions.

Best regards, RjS Description and Assessment of the Proposed Changes for TSTF-500 1.0 Description 2.0 Assessment 2.1 Applicability of TSTF-500 and Model Safety Evaluation (SE) 2.2 Verifications and Required Final Safety Anallysis Report Changes 2.3 Optional Changes and Variations 3.0 Regulatory Analysis 3.1 No Significant Hazards Consideration Determination 3.2 Applicable Regulatory Requirements/Criteria 4.0 Environmental Consideration 5.0 References 1

Description and Assessment of Proposed Changes for TSTF-500

1.0 DESCRIPTION

The Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2, and 3 Technical Specification (TS) requirements are proposed to be revised from requirements on battery cells to requirements on the battery. This focuses the requirements on the assumed safety function of the battery. The proposed amendment would revise TS requirements related to direct current (DC) electrical systems in TS limiting condition for operation (LCO) 3.8.4, DC Sources - Operating, LCO 3.8.5, DC Sources - Shutdown, and LCO 3.8.6, Battery Parameters. A new Battery Monitoring and Maintenance Program is being proposed for Section 5.5, Administrative Controls - Programs and Manuals.

Specifically, the proposed changes request new actions for an inoperable battery charger and alternate battery charger testing criteria for 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 Surveillance Requirements, to a licensee-controlled program, and that specific actions with associated Completion Times (CTs) 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 Section 5.5 of the Administrative Controls for the maintenance and monitoring of station batteries. The items proposed to be relocated will be contained within this program, titled the Battery Monitoring and Maintenance Program.

The proposed changes provide new Actions for an inoperable battery charger and alternate battery charger testing criteria. The longer CT for an inoperable battery charger will allow additional time for maintenance and testing. In addition, a number of SRs are relocated to licensee control including the monitoring of battery cell parameter requirements and performance of battery maintenance activities.

These changes are consistent with the U.S. Nuclear Regulatory Commission (NRC)-

approved Technical Specifications Task Force (TSTF) Traveler TSTF-500, Revision 2.

The availability of this TS improvement was announced in the Federal Register on September 1, 2011 (76 FR 54510).

2 Description and Assessment of Proposed Changes for TSTF-500

2.0 ASSESSMENT

2.1 APPLICABILITY OF TSTF-500 AND MODEL SAFETY EVALUATION (SE)

APS has reviewed the model SE referenced in the Federal Register Notice of Availability published on September 1, 2011 (76 FR 54510). The review included the NRC staff SE, as well as the supporting information provided in TSTF-500, Revision 2.

As described herein, APS has concluded that the technical bases for the proposed changes presented in TSTF-500, Revision 2, and the model SE prepared by the NRC staff are applicable to PVNGS Units 1, 2, and 3 and support iincorporation of this amendment into the PVNGS Units 1, 2, and 3 TS.

TSTF-500, Revision 2, deletes certain Surveillances and renumbers the subsequent Surveillances. APS has chosen to retain the deleted Surveillance numbers, mark them "Deleted," and not to renumber the subsequent Surveillances. These differences are editorial and do not affect the applicability of TSTF-500, Revision 2, to the PVNGS Units 1, 2, and 3 TS.

The PVNGS Units 1, 2, and 3 TSs differ from the Standard TS (STS) which were the basis for TSTF-500 in the following ways:

1. The current PVNGS TS 3.8.4 contains two additional Actions (C and D) not in the STS that address the Condition of no battery chargers on a DC bus. These actions were included during the Improved Technical Specification conversion in Palo Verde Units 1, 2, and 3 Operating License Amendment No. 117 issued on May 20, 1998 (ADAMS Accession No. ML021720060). These Actions (Conditions, Required Actions, and Completion Times) will be replaced with the proposed Conditions, Required Actions, and Completion Times for Condition A and revised Condition C in TSTF-500. The published model SE continues to be applicable to the plant-specific amendment because the proposed PVNGS TS 3.8.4, Conditions A and C, are consistent with TSTF-500.

2. The current PVNGS SR 3.8.4.7 Note allows for the flexibility to perform either the battery performance discharge test or the modified performance discharge test of SR 3.8.4.8 (proposed SR 3.8.6.9) in lieu of the service test in SR 3.8.4.7 at any time, and does not specify a "once per 60 months" restriction. This flexibility was included during the Improved Technical Specification conversion in Operating License Amendment No. 117. The allowance in the current SR 3.8.4.7 Note to perform battery performance discharge test in lieu of the battery service test is being deleted to be consistent with TSTF-500. Also, since the PVNGS SR 3.8.4.7 Note currently does not specify a "once per 60 months" restriction, no change is needed to be consistent with the TSTF-500 change to delete the "once per 60 months" restriction. The published model SE continues to be applicable to the plant-specific amendment because the proposed SR 3.8.4.7 Note is consistent with TSTF-500.

3 Description and Assessment of Proposed Changes for TSTF-500

3. The current PVNGS TS 3.8.5 contains two additional Actions (B and C) not in the STS that address the Condition of no battery chargers on a DC bus. These Actions were included during the Improved Technical Specification conversion in Operating License Amendment No. 117. These Actions (Conditions, Required Actions, and Completion Times) will be replaced with the proposed Conditions, Required Actions, and Completion Times for Condition A and revised Condition B in TSTF-500. The published model SE continues to be applicable to the plant-specific amendment because the proposed PVNGS TS 3.8.5, Conditions A and B, are consistent with TSTF-500.

4.

The current PVNGS Technical Specifications have incorporated TSTF-425, Relocate Surveillance Frequencies to Licensee Control-RITSTF Initiative 5b, issued in Amendment No. 188 on December 15, 2011 (ADAMS Accession No. ML112620293). This TSTF-425 has also been incorporated in Revision 4 of N U REG-1432, Standard Technical Specifications, Combustion Engineering Plants. In order to be consistent with PVNGS TS Amendment No. 188 and Revision 4 of NUREG-1432, upon implementation of the approved TSTF-500 TS amendment, the surveillance frequencies and their bases shown in TSTF-500, Revision 2, for the LCO 3.8.4 and 3.8.6 SRs, except for the frequencies that are related to specific conditions such as battery degradation and capacity, will be specified in the Surveillance Frequency Control Program required by TS 5.5.18.

One variation from the TS changes in TSTF-500 is proposed, as described in Section 2.3, Optional Changes and Variations.

2.2 VERIFICATIONS AND REQUIRED FINAL SAFETY ANALYSIS REPORT CHANGES As described in Section 4.7.1, Verifications, in TSTF-500, APS provides the following verifications.

1. The Enclosure to this submittal contains a letter from the manufacturer of the batteries used at PVNGS Units 1, 2, and 3 verifying the acceptability of using float current monitoring instead of specific gravity monitoring as an indication of the state-of-charge of the battery and that this will hold true over the life of the battery.

2. APS verifies that the equipment that will be used to monitor float current under SR 3.8.6.4 will have the necessary accuracy and capability to measure electrical currents in the expected range. Additionally, APS verifies that the minimum required procedural time to measure battery float current will be 30 seconds or as recommended by the float current measurement instrument manufacturer. This minimum float current measurement time is required to provide a more accurate battery float current reading. These ongoing actions are included in proposed TS Bases for SR 3.8.6.4.

4 Description and Assessment of Proposed Changes for TSTF-500

3. APS verifies that battery room temperature is routinely monitored such that a room temperature excursion could reasonably be detected and corrected prior to the average battery electrolyte temperature dropping below the minimum electrolyte temperature. This ongoing action is included in proposed TS Bases for SR 3.8.6.7.

4. The cell resistance limits in existing SRs 3.8.4.2 and 3.8.4.5 will be relocated to the Battery Monitoring and Maintenance Program required and described in proposed TS Section 5.5, Programs and Manuals. The connection resistance limit is 30 pOhms based on a maximum 20 mV drop assumption for intercell battery connections, per Nuclear Logistics Incorporated (NLI) Technical Bulletin TB-Battery-001. This limit, which has been implemented in site procedures, will correct the non-conservative limit of 150 pOhms in the existing SRs 3.8.4.2 and 3.8.4.5.

5. APS verifies that the existing SR 3.8.4.8 (proposed SR 3.8.6.9) 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.

6. Monitoring of battery parameters (i.e., specific gravity, electrolyte level, cell temperature, float voltage, connection resistance, and physical condition) will be relocated to the licensee-controlled program, required and described in proposed TS Section 5.5, Programs and Manuals, and titled the Battery Monitoring and Maintenance Program.

7. APS verifies that plant procedures will require verification of the selection of the pilot cell or cells when performing SR 3.8.6.5. This ongoing action is included in proposed TS Bases for SR 3.8.6.5.

As described in Attachment 2, List of Required Updated Final Analysis Report (UFSAR) Descriptions, APS will verify or revise the PVNGS UJFSAR to include the following, as part of the adoption of TSTF-500, Revision 2, consistent with the model application referenced in the TSTF-500 notice of availability in the September 1, 2011 Federal Register (76 FR 54510).

1. How a 5 percent design margin for the batteries corresponds to a 2 amp float current value indicating that the battery is 95 percent charged.

2. How long term battery performance is obtained by maintaining a float voltage greater than or equal to the minimum established design limits provided by the battery manufacturer.

3. How the batteries are sized with correction margins that include temperature and aging and how these margins are maintained.

5 Description and Assessment of Proposed Changes for TSTF-500

4. The minimum established design limit for battery terminal float voltage.

5. The minimum established design limit for electrolyte level.

6. The minimum established design limit for electrolyte temperature.

7. How each battery is designed with additional capacity above that required by the design duty cycles to allow for temperature variations and other factors.

8. Normal DC system operation (i.e., powered from the battery chargers) with the batteries floating on the system and with a loss of normal power to the battery charger.

2.3 OPTIONAL CHANGES AND VARIATIONS APS is proposing the following variation from the TS changes described in TSTF-500, Revision 2. This variation is consistent with the applicable parts of the NRC staff model SE referenced in the Federal Registeron September 1, 2011 (76 FR 54510).

In TS 3.8.5, DC Sources - Shutdown, Condition A, APS is proposing to delete "AND the redundant subsystem battery and charger[s] OPERABLE." This variation from TSTF-500 will result in the proposed TS 3.8.5, Condition A, being identical to the new TS 3.8.4, Condition A. This variation would be consistent with the NRC staff model SE, Section 3.2.2.1, Evaluation of TS 3.8.5; Action, Condition A Change (1), which states the following with regard to the new TS 3.8.5, Condition A:

"This change is identical to the proposed change described in Section 3.2.1.1 of this SE with the exception that this Condition prescribes the limitations during shutdown conditions. The NRC staff's evaluation of this proposed change can be found in Section 3.2.1.1 of this SE and is applicable to both the shutdown and operating modes." (Note: SE Section 3.2.1.1 describes the acceptability of proposed TS 3.8.4 Condition A.)

3.0 REGULATORY ANALYSIS

3.1 NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION APS has evaluated the proposed changes to the Palo Verde Nuclear Generating Station (PVNGS) Units 1, 2, and 3 Technical Specifications (TS) using the criteria in Section 50.92 to Title 10 of the Code of Federal Regulations (10 CFR) and has determined that the proposed changes do not involve a significant hazards consideration.

Description of Amendment Request: The proposed amendment would revise PVNGS Units 1, 2, and 3 TS requirements related to direct current (DC) electrical systems in TS limiting condition for operation (LCO) 3.8.4, DC Sources - Operating, LCO 3.8.5, 6

Description and Assessment of Proposed Changes for TSTF-500 DC Sources - Shutdown, and LCO 3.8.6, Battery Parameters. A new Battery Monitoring and Maintenance Program is being proposed for Section 5.5, Administrative Controls - Programs and Manuals.

Basis for proposed no significant hazards consideration determination: As required by 10 CFR 50.91(a), the APS analysis of the issue of no significant hazards consideration is presented below:

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

Response: No.

The proposed changes restructure the TS for the direct current (DC) electrical power system and are consistent with TSTF-500, Revision 2. The proposed changes modify TS Actions relating to battery and 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). Rather, the DC electrical power system supports equipment used to mitigate accidents. The proposed changes to restructure TS and change surveillances for batteries and chargers to incorporate the updates included in TSTF-500, Revision 2, will maintain the same level of equipment performance required for mitigating accidents assumed in the UFSAR. Operation in accordance with the proposed TS would ensure that the DC electrical power system is capable of performing its specified safety function as described in the UFSAR. Therefore, the mitigating functions supported by the DC electrical power system will continue to provide the protection assumed by the analysis.

The relocation of preventive maintenance surveillances, and certain operating limits and actions, to a 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 arid maintenance that are 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 changes do 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 previously evaluated?

7 Description and Assessment of Proposed Changes for TSTF-500 Response: No The proposed changes involve 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 supports equipment used to mitigate accidents. The proposed changes to restructure the TS and change surveillances for batteries and chargers to incorporate the updates included in TSTF-500, Revision 2, will maintain the same level of equipment performance required for mitigating accidents assumed in the UFSAR. Administrative and mechanical controls are in place to ensure the design and operation of the DC systems continue to meet the plant design basis described in the UFSAR. Therefore, operation of the facility in accordance with this proposed change Will not create the possibility of a new or different kind of accident from any accident previously evaluated.

3.

Does the proposed change involve a significant reduction in the 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 equipment margins will be maintained in accordance with the plant-specific design bases as a result of the proposed changes. 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.

TS changes made in accordance with TSTF-500, Revision 2, maintain the same level of equipment performance stated in the UFSAR and the current TSs.

Therefore, the proposed changes do not involve a significant reduction in the margin of safety.

3.2 APPLICABLE REGULATORY REQUIREMENTS/CRITERIA APS has reviewed the NRC staff model SE referenced in the Notice of Availability and concluded that the Regulatory Evaluation section is applicable to PVNGS Units 1, 2, and 3.

8 Description and Assessment of Proposed Changes for TSTF-500 It should be noted that PVNGS is committed to different Regulatory Guide (RG) 1.32 and 1.75 revisions than those referenced in the Regulatory Evaluation section in the model SE as described below.

The model SE refers to Revision 3 of RG 1.32, Criteria for Power Systems for Nuclear Power Plants. However, as described in UFSAR Section 1.8 and TS Bases B 3.8.4, PVNGS is committed to RG 1.32 Revision 0 (August 11, 1972),

Use of IEEE STD 308-1971, Criteria for Class 1E Electrical Systems for Nuclear Power Generating Stations.

The model SE refers to Revision 3 of RG 1.75, Criteria for Independence of Electrical Safety System. However, as described in UFSAR Section 1.8, PVNGS is committed to Revision 1 of RG 1.75 (January 1975), Physical Independence of Electric Systems, with clarifications and/or exceptions.

These differences do not result in any needed changes for adoption of TSTF-500, Revision 2 at PVNGS and, therefore, should not affect the applicability of the NRC staff model SE to PVNGS Units 1, 2, and 3.

4.0 ENVIRONMENTAL CONSIDERATION

The proposed TS change would change a requirement with respect to installation or use of a facility component located within the restricted area, as defined in 10 CFR Part 20, and would change an inspection or surveillance requirement. However, the proposed change 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 TS change 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 TS change.

5.0 REFERENCES

1.

Federal Register 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 (77 FR 54510, September 1, 2011)

2.

Technical Specifications Task Force Traveler TSTF-500 Revision 2 (ADAMS Accession No. ML092670242)

3.

Model Application and Safety Evaluation for Plant-Specific Adoption of TSTF-500, Revision 2 (ADAMS Accession No. ML111751792) 9

ATTACHMENT 2 LIST OF REQUIRED UPDATED FINAL SAFETY ANALYSIS REPORT (UFSAR)

DESCRIPTIONS The following table identifies UFSAR descriptions required by APS as part of the adoption of TSTF-500, Revision 2.

REQUIRED UFSAR DESCRIPTIONS DUE DATE / EVENT

-I.

APS will change or verify that the UFSAR:

1. Describes how a 5 percent design margin for the batteries corresponds to a 2 amp float current value indicating that the battery is 95 percent charged.

2. States that long term battery performance is supported by maintaining a float voltage greater than or equal to the minimum established design limits provided by the battery manufacturer, which corresponds to 2.17 V per connected cell and that there are 60 connected cells in the battery, which corresponds to 130.2 V at the battery terminals.

3. Describes how the batteries are sized with correction margins that include temperature and aging and how these margins are maintained.

4. States the minimum established design limit for battery terminal float voltage.

5. States the minimum established design limit for electrolyte level.

6. States the minimum established design limit for electrolyte temperature.

7. Describes how each battery is designed with additional capacity above that required by the design duty cycles to allow for temperature variations and other factors.

8. Describes normal DC system operation (i.e., powered from the battery chargers) with the batteries 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.

Upon implementation of the approved Technical Specification amendment (applies to all)

Markup Pages of Existing TSs and TS Bases Technical Specification Page Markups 3.8.4-1 3.8.4-2 3.8.4-3 3.8.4-4 3.8.4-5 3.8.5-1 3.8.5-2 3.8.5-3 3.8.6-1 3.8.6-2 3.8.6-3 3.8.6-4 3.8.6-5 3.8.6-6 3.8.6-7 3.8.6-8 5.5-18 5.5-19 Technical Specification Bases Page Markups B 3.8.4-1 B 3.8.4-2 B 3.8.4-3 B 3.8.4-4 B 3.8.4-5 B 3.8.4-6 B 3.8.4-7 B 3.8.4-8 B 3.8.4-9 B 3.8.4-10 B 3.8.4-11 B 3.8.4-12 B 3.8.4-13 B 3.8.4-14 B 3.8.4-15 B 3.8.5-1 B 3.8.5-2 B 3.8.5-3 B 3.8.5-4 B 3.8.5-5 B 3.8.5-6 B 3.8.5-7 B 3.8.5-8 B 3.8.6-1 B 3.8.6-2 B 3.8.6-3 B 3.8.6-4 B 3.8.6-5 B 3.8.6-6 B 3.8.6-7 B 3.8.6-8 B 3.8.6-9

[ 3.8.6-10 B 3.8.6-11 3 3.8.6-12 B 3.8.6-13

[3 3.8.6-14

[3 3.8.6-15 3 3.8.6-16

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

3.8.4 APPLICABILITY

The Train A and Train B DC electrical power subsystems shall be OPERABLE.

MODES 1, 2, 3, and 4.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A.

One battery charger on A.1 Restore battery 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> one subsystem terminal voltage to inoperable.

greater than or equal to the minimum established float voltage.

AND A.2 Verify battery float Once per 12 current s 2 amps.

hours AND A.3 Restore battery 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> charger to OPERABLE status.

BA. One DC electrical BA.1 Restore DC electrical 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> power subsystem power subsystem to (exclusive of the OPERABLE status.

b-attery charger) inoperable for reasons other than Condition A.

C4. Required Action and C4.1 Be in MODE 3.

6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion Time of Condition A AND not met.

C8.2 Be in MODE 5.

36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> PALO VERDE UNITS 1,2,3 3.8.4-1 AMENDMENT NO. 117

DC Sources - Operating 3.8.4 C'

0 r,-~

fl

+--4-~1 pew*er subsy"ste battery charger C.

i Verify, battcryý crL4 par-ametei2s meet Table 3.8.6 1 category-A limits ANDP IDRestore P9 electr-cal po~wer subsy-&te battery charger-~

OPERABLE status AND Once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> D

Requi red ActioGRn and D.I DeclarIe associat.

-i-mmedi at&

associated Completion battery inoperab4 TimeA ofCoditio C not Met.

PALO VERDE UNITS 1,2,3 3.8.4-2 AMENDMENT NO. 117

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.4.1 Verify battery terminal voltage is greater In accordance than or equal to the minimum established with the float voltage *Ž

• 2 V on flo' t c*hage.

Surveillance Frequency Control Program SR 3.8.4.2 Deleted Verif no. visible cr.ro.sion a

• R Tn accrdan battery terminals n...o.

wet

.i.th the OR Frequency..

Control P*gramm Verif, battery conec.tion resistance.

_ 150E 6 ohms for inter ce!l connections.

< 150 6 ohms for inter rack cnnec.ti.s..-

< 1-5E 6 ohms -frP in-ter tier-R-Rnnet---! -

ad 0E 6 ohms for terminal connections.

SR 3.8.4.3 Deleted Verfy battery cels cell pl In accor dan e.

nd rackslshow no) visual indication of h4hZin physical damage or abnrm12al deterior2ation4 S6uVE~i11aRe tha could A

degrade battery perform;ance.

FrE~quep SR 3.8.4.4 Deleted Remove visible terminal corrosion In accordance and verify battery cell to ce llI and d;

ter-minal conecton are lean, _and are syu.ye44lla~e-e cated with ant crrsin atril SR 3.8.4.5 Deleted Ver-if-y batter~y conn~ection 1n accordanc r-esistance? is wi th the 1 TCE 6 ohMS for-inter cell conn~ections.

suvýýae 1nD7 6-ohms for inter-rack connections.-

Fr-equeR-Gy 15E 6 ohms for inter-tier-connections.

ConRtrol Progrpam and !5 16CE 6 ohms for terminal connetEi, GnRS---

(continued)

PALO VERDE UNITS 1,2,3 3.8.4-3 AMENDMENT NO. 4-59, 188

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY 4-SR 3.8.4.6 KlI fT:"

Tki,

IZ yrnI 1

n~

kn] I

-n+

1m 1,

Rn perfor".m in MODE 1,

, 3 or '1 on the charger ceaditerd far g

OPERABI ITY.

Howevep perpformed to reestablish OPERABILITY pgrovi~ded 8n asseGssment deterPmines the saet o the? plant 4s maintained or-enRhanced.

Verify each battery charger supplies

> 400 amps for Batteries A and B and

• 300 amps for Batteries C and D at, greater than or equal to the minimum In accordance with the Surveillance Frequency Control Program established float voltage 125-V for Ž 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

OR Verify each battery charger can recharge the battery to the fully charged state within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 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.

4-SR 3.8.4.7

---

---- ----NOTES

1.

The battery perrma.*

nce disGha...

e.st er--the modified performance discharge test in SR 3.8.6.94=4 may be performed in lieu of the service test in SR 3.8.4.7.

2.

This Surveillance shall performed in MODE 1, 2, not be 3, or 4.

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

In accordance with the Surveillance Frequency Control Program (continued)

AMENDMENT NO.

5r&, 188 PALO VERDE UNITS 1,2,3 3.8.4-4

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.8 Deleted NOTE T

Sri n

shll, not bc pcrfor-rn

,4 MODE 1, 2, 3, or 4.

kIc 1 f%/

kni-n-cvw rýnnmi Kt i c

ý,

Qnw rif f-hc f

i-

+-i nn

i. 'knn riikiný+nrl

-Fn n nc~rfrv'm~nr,2 cH c'hrr~c~ tc~ct r~y' n mrAi Fi cA nnrfnrm~ncr' dic.rh.~rpp tnc.t~

In accorda",

v' *nce' Contro-l Progrpam A4D 12 months when battery shows doq adaý t...

oor has reached 85%

of the e xpec ted

< 1O% of manufacturer's rating A4P 2<, months when batterl ha*

reached 81%

of capaci ty" PALO VERDE UNITS 1,2,3 3.8.4-5 AMENDMENT NO. 41-1ý9, 188

DC Sources - Shutdown 3.8.5 3.8 ELECTRICAL POWER SYSTEMS 3.8.5 DC Sources - Shutdown LCO

3.8.5 APPLICABILITY

DC electrical power subsystem shall be OPERABLE to support the DC electrical power distribution subsystem(s) required by LCO 3.8.10, "Distribution Systems - Shutdown."

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

ACTIONS 7-----------------------

NOTE In MODES 1, 2, 3, and 4, Required Action BA.2.3 is not applicable.

CONDITION REQUIRED ACTION COMPLETION TIME A.

One battery charger on A.1 Restore battery 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> one subsýstem terminal voltage to inoperable.

greater than or equal to the -minimum estabIished float voltage.

AND A.2 Verify battery float Once per 12 current : 2 amps.

hours AND A.3 Restore battery 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> charger to OPERABLE status.

PALO VERDE UNITS 1,2,3 3.8.5-1 AMENDMENT NO. 117

DC Sources Shutdown 3.8.5 BA.

One or more required DC electrical power subsystems (exclusive 9f thcbatterpy charge-r) inoperable for reasons other than Condition A.

OR Required Actions and associated Completion Time of Condition A not met.

BA.1 Declare affected required feature(s) inoperable.

OR BA.2.1 Suspend CORE ALTERATIONS.

AND BA.2.2 Suspend movement of irradiated fuel assemblies.

AND BA.2.3 Initiate action to suspend operations involving positive reactivity additions AND BA.2.4 Initiate action to restore required DC electrical power, subsystems to OPERABLE status.

Immediately Immediately Immediately Immediately Immediately PALO VERDE UNITS 1,2,3 3.8.5-2 AMENDMENT NO. 117

DC Sources - Shutdown 3.8.5 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME B

Requed electrical-B.1 Verify battery..

4 I-ell pewep ubsytem parameters meet Tabl-e battery chagepr 3.8.6 1 category-Once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> B 2 Restore DC electrical 24 ho,-s po'~~e SubS%~'steRm battepy chalrger-t OPERABLE status, C. Required Action and C.1 Declar-e associa

!ted t&

associated CompletGion battery !noper-abl-e-T-im4e of Condition B not m:et.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.5.1 NOTE-------------------

The following SRs are not required to be performed:

SR 3.8 4.6, and SR 3.8.4.7,-aed For DC sources required to be OPERABLE, the In accordance following SRs are applicable:

with applicable SRs SR 3.8.4.1 SR 3.8.1.1 SR 3.

8.

44 SR 3.8.4.6-2 SR 32.8.4.5 SR 3. 8. 4-.

SR 3.8.4.732 SR 32.8.4.6 PALO VERDE UNITS 1,2,3 3.8.5-3 AMENDMENT NO. 117

Battery G&4 Parameters 3.8.6 3.8 ELECTRICAL POWER SYSTEMS 3.8.6 Battery Q&4 Parameters LCO

3.8.6 APPLICABILITY

Battery Ge14 parameters for the Train A and Train B electrical power subsystem batteries shall be within te limits 01 !able 3.8.6 1.

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 Verify pilot ce!-

1-hgusr with one or mo.re electrolyte

,ev, !ap b.ite4-G&4 float Voltage mee parameteps not within Table 3.8.6 1 Category A^ or B Categ*r.y C limits.

AND A.

Verify battery Gi4 parameterPS eet AND Tabl 3.8.6 1e dy thereafter A4D 3l days

,A.3 Restore batter~y cell1 par ame ters t Category A and B l4imts of Table 3.8.6 1.

PALO VERDE UNITS 1,2,3 3.8.6-1 AMENDMENT NO. 117

Battery C-&4 Parameters 3.8.6 A.

One battery with one A. 1 Perform S R3.841 or more battery cells tloat voltage

<2.07 V.

AND A.2 Perform SR 3.8.6.4.

AND A.3 Restore affected cell voltage - 2.07 V.

2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 2 hours 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> B.

One battery with float B.1 Perform SR 3.8.4.1.

2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> current > 2 amps.

AND B.2 Restore float current 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to s 2 amps.

-NOTE NOTE------

Required Action C.2 shall Required Actions C.1 and C.2 be completed if are only applicable if electrolyte level was electrolyte level was below below the top of plates.

the top of plates.

C.

One battery with one C.1 Restore electrolyte 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or more cells level to above top of electrolyte level less plates.

than minimum established design AND limits.

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

AND C.3 Restore electrolyte 31 days level to greater than or equal to minimum established design limits.

PALO VERDE UNITS 1,2,3 3.8.6-2 AMENDMENT NO. 117

Battery 9-&4 Parameters 3.8.6 D.

One battery with pilot D.1 Restore battery pilot 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> cell electrol yte cell temperature to temperature less than greater than or equal minimum established to minimum design limits, established design limits.

E.

One or more batteries E.1 Restore battery 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> in redundant parameters for subsystems with batteries in one battery parameters not subsystem to within within limits.

limits.

(continued)

PALO VERDE UNITS 1,2,3 3.8.6-3 AMENDMENT NO. 117

Battery ;e4 Parameters 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME Fg.

Required Action and F8.1 Declare associated Immediately associated Completion battery inoperable.

Time of Condition A.

B, C, D, or E not met.

OR One battery with one or more battery cells float voltage < 2.07 V and float current

> 2 amps.

OnAe orp morPe batterie-s

'.i th averag9e el ectrol!"te temperature of the 4--

,ý,* -

71 71 fnyn nr mnr'n k2++n-Hnri p with one or more battery Gell parameters eot within Category C limits.

SURVEILLANCE REQUIREMENTS SURVEI LLANCE FREQUENCY SR 3.8.6.1 Deleted Vri fy battery cell pa.ameter meet In accordancc T,

B.6 1 Categepy A limits.

with the Sur-(eillanc e F

req ueRn ControProgre~am (conti nued)

PALO VERDE UNITS 1,2,3 3.8.6-4 AMENDMENT NO. 14, 188

Battery -e4 Parameters 3.8.6 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.6.2 Del eted-k/..-,

kn fn.

,Jl

-n-~-'-~*-*

m M I + r

- - I -

I In accordance With the Sur-veillance Frequency' Control Program AND Once w~i thin4

ý day"s afte-r battery discharge

<195 V AND Once Wl~thin 7 day"s after-battery' overcharge

> 159 V SR 3.8.6.3 Deleted Verify average elec-trolyte In

.accrac temperature of representative cells is-,

-ý ph, Frequency Control Progqram SR 3.8.6.4 NOTE Not required to be met when battery terminal voltage is less than the minimum established float voltage of SR 3.8.41 Verify each battery float current is < 2 In accordance amps.

with the Surveiol lance Cdt*hProgram PALO VERDE UNITS 1,2,3 3.8.6-5 AMENDMENT NO. 44-ý, 188

Battery ;e4 Parameters 3.8.6 SR 3.8.6.5 Verify each battery pilot cell float In accordance voltage is 2.U/ V.

with the Survei lance Frequency Control Program SR 3.8.6.6 Verify each battery connected cell In accordance electrolyte level is greater than or equal with the to minimum established design limits.

Surveillance Frequency Control Program SR 3.8.6.7 Verify each battery pilot cell temperature In accordance is greater than or equal to minimum with the established design limits.

Surveillance Frequency Control Program SR 3.8.6.8 Verify each battery connected cell float In accordance voltage is Ž 2.07 V.

with the SurveilIlance Frequency Control Program PALO VERDE UNITS 1,2,3 3.8.6-6 AMENDMENT NO. 44-7-, 188

Battery ;&4 Parameters 3.8.6.

SR 3.8.6.9 NOTE---------

This Surveillance shall not be performed in MODE 1, 2, 3, or 4.

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

Verify battery capacity is Ž 80% of the manufacturer's ratinq when sub~iected to a performance discharqe test or a modified performance discharqe test.

In accordance with-thFe Surveill1ance onrol rogram 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 battery has reached 85% of the expected life with capacity

Ž 100% of manufacturer's rating PALO VERDE UNITS 1,2,3 3.8.6-7 AMENDMENT NO. 44-ý, 188

Battery ;&4 Parameters 3.8.6 7.-.Il-,7

'1 C*

1C pI A

IP R-I

)1 I

A I"3....

4-*

n-ýý-

V V.

A.

1., '

J. 1*

CATEGORY A-.

CATEGORYD C.

ITMTTS FOR EACH CATEGORY-v ALLOWABLE LIMITS nlETSrIGNATED PILOT IMITS FOR EACH

.*DR4AGH PARAMETER C-E-L-6NNECE EL CONNECTED CELL ElectroGlyte Lee iiuevevel Minimum 4

l evel A toep 9@

iRd*-iatir, mark, indc-ato'n mark, p e

'kc

,Rt aRd ý* inch o

R G-,

a-Rd -

verfo.in above, max-imu above maximu 1 eve] indicatIion level indication

&pe~i-f--G 49.~Not mrGe than average conncc~ted cells-c AND AND connected cls Ave-ae Gf----1l-conncted ce..ll (a) it is acceptable for the electrolyte level to tempor-arily3 inrGeaSe above t~hp nrfe mqxlmiim dringiq nnuAli~inAq ph;4raocý. nrvidlrd it. iý. pnt I-.......

.~,

~~1~~~~

_.4 1 -

7-I-..

-7.

4 is,., I I is is L, J

I i

i...

I T

f

-j Txx r

vivs is:

v s

1z: T zji 1 ftj b f ttlu GhaPge.

..... 1

z. ie.. Y,,,

is

,,,I,[,

W

,n I,4 f

A k

ý I

k

-F -

4-4 I

/

I I I

11

+

ki

-F

ý -Fý I

i -; -

ý ý- ý

-p-1 I -

14 --

ý11 1, 1ý4--

rnkz.n n

Fn miviri

,rF 7

Aznr I.1k-nn

-inn in rnrn4 r

l. r sati sfy speci ficG gravi ty requirpements, specific-gravity of ec f-r,nnnr-+r't r'cl I rkhnl n' mrnc' rr,,A r-,.

n cýn' *nc c~r'-i

,-+-i,'n r-F 4-kr,7,

4 s

allo'~~ance.

PALO VERDE UNITS 1,2.3 3.8.6-8 AMENDMENT NO. 4-1-I-158

Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.18 Surveillance Frequency Control Program This program provides controls for Surveillance Frequencies.

The program shall ensure that Surveillance Requirements specified in the Technical Specifications are performed at intervals sufficient to assure the associated Limiting Conditions for Operation are met.

a.

The Surveillance Frequency Control Program shall contain a list of Frequencies of those Surveillance Requirements for which the Frequency is controlled by the program.

b.

Changes of the Frequencies listed in the Surveillance Frequency Control Program shall be made in accordance with NEI 04-10, "Risk-Informed Method for Control of Surveillance Frequencies," Revision 1.

c.

The provisions of Surveillance Requirements 3.0.2 and 3.0.3 are applicable to the Frequencies established in the Surveillance Frequency Control Program.

5.5.19 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 (RG),. with RG exceptions and program provisions as identified below:

a.

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

1.

Battery temperature correction may be performed before or after conducting 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, "Inspections," the following shall be used: "Wherereference is made to the pilot cell, pilot cell selection shall be based on the lowest voltage cell in the battery."

PALO VERDE UNITS 1,2,3 5.5-18 AMENDMENT NO. 188

Programs and Manuals 5.5 5.5 Programs and Manuals (continued)

4.

In Regulatory Guide 1.129, Regulatory Position 3, Subsection 5.4.1, "State of Charge Indicator," the following statements in paragraph (d) 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."

b.

The program shall include the following provisions:

1.

Actions to restore battery cells with float voltage

< 2.07 V;

2.

Actions to determine whether the float voltage of the remaining battery cells is Ž 2.07 V when the float voltage of a battery cell has been found to be < 2.07 V;

3.

Actions to equalize and test battery cells that had been discovered with electrolyte level below the top of the plates;

4.

Limits on average electrolyte temperature, batter connection resistance, and battery terminal vo tage: and

5.

A requirement to obtain specific gravity readings of all cells at each discharge test, consistent with manufactur'er recommendations.

PALO VERDE UNITS 1,2,3 5.5-19 AMENDMENT NO. 188

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

Operating BASES BACKGROUND The station DC electrical power system provides the AC emergency power system with control power.

It also provides both motive and control power to selected safety related equipment and preferred AC vital instrument bus power (via inverters).

As required by 10 CFR 50, Appendix A, GDC 17 (Ref. 1), the DC electrical power system is designed to have sufficient independence, redundancy, and testability to perform its safety functions, assuming a single failure.

The DC electrical power system also conforms to the recommendations of Regulatory Guide 1.6 (Ref. 2) and IEEE-308 (Ref. 3).

The 125 VDC electrical power system consists of two independent and redundant safety related Class 1E DC electrical power subsystems (Train A and Train B).

Each subsystem consists of two 125 VDC batteries (each batte..

1*

.G..ap..44y, the associated battery charger(s) for each battery, and all the associated control equipment and interconnecting cabling.

Each subsystem contains two DC power channels.

There are four channels designated as A and C for Train A, and B and D for Train B for each unit (See 3.8.4 LCO Bases section for detailed description).

Additionally there is one backup battery charger per subsystem, which provides backup service in the event that the normal battery charger is out of service.

If the backup battery charger is substituted for one of the normal battery chargers, then the requirements of independence and redundancy between subsystems are maintained.

During normal operation, the 125 VDC load is powered from the battery chargers with the batteries floating on the system.

In case of loss of normal power to the battery charger, the DC load is automatically powered from the station batteries.

The Train A and Train B DC electrical power subsystems provide the control power for its associated Class 1E AC power load group, 4.16 kV switchgear, and 480 V load centers.

The DC electrical power subsystems also provide DC electrical power to the inverters, which in turn power the AC vital instrument buses.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-1 REVISION 0

DC Sources - Operating B 3.

8.4 BACKGROUND

The DC power distribution system is described in more detail (continued) in the Bases for LCO 3.8.9, "Distribution Systems-Operating," and for LCO 3.8.10, "Distribution Systems -

Shutdown."

E-ah battery has adequ.ate storage capacity to car. the required load contiRnusly for, at least 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.s as diScussc in.

the UFSAR, Chaptcr 8 (Ref. '1).

Each 125 VDC battery is separately housed in a ventilated room apart from its charger and distribution centers.

Each subsystem is located in an area separated physically and electrically from the other subsystem to ensure that a single failure in one subsystem does not cause a failure in a redundant subsystem.

There is no sharing between redundant Class 1E subsystems, such as batteries, battery chargers, or distribution panels.

Each battery has adequate storage capacity to meet the duty cycle(s) discussed in the UFSAR, Chapter 8 (Ref 4).

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

In addition, each DC electrical power subsystem contains a backup battery charger which is manually transferable to either channel of a subsystem.

The transfer mechanism is mechanically interlocked to prevent both DC channels of a subsystem from being simultaneously connected to the backup battery charger.

The batteries for Train A and Train B DC electrical power subsystems are sized to produce required capacity at 80% of nameplate rating.

The minimum design voltage limit is determined for each train per Re erence 13. 7ý- eG-t-age V

Pel, Wph P-ppsponds to a total minimum volntag output of 128 V pe b*attery dlsGcussed i the DesignBa-sis Manua (ef41)

The battery cells are of flooded lead acid construction with a nominal specific gravity of 1.215 +/- 0.010.

This specific gravity corresponds to an open circuit battery voltage of approximately 123 V for 60 cell battery (i.e.,

cell voltage of 2.07 volts per cell (pc) at the upper range of the specific gravity) (Refs.

14 and 15). T e open circuit voltage is the voltage maintained when there is no charging or discharging.

Optimal long term performance is obtained by maintaining a float voltage 2.17 to 2.25 Vpc.

This provides adequate over-potential, which limits the formation of lead sulfate and self discharge. The nominal (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-2 REVISION 37

DC Sources - Operating B 3.8.4 float voltage of 2.25 Vpc corresponds to a total float voltage output of 135 V for a 60 cell battery as discussed in the UFSAR, Chapter 8 (Ref.

4).

Each Train A and Train B DC electrical power subsystem battery charger has ample power output capacity for the steady state operation of connected loads required during normal operation, while at the same time maintaining its battery bank fully charged.

Each battery charger also has sufficient excess capacity to restore the battery from the design minimum charge to its fully charged state within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> while supplying normal steady state loads discussed in the UFSAR, Chapter 8 (Ref. 4).

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 equalize mode is at a higher voltage than the float mode and charging current is correspondingly higher.

The battery charger is operated in the 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 15% 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 exponential ly decaying charging cUrrent or by evaluating the amp-hours discharged from the battery and amp-hours returned to the battery.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-3 REVISION 37

DC Sources - Operating B 3.8.4 APPLICABLE The initial conditions of Design Basis Accident (DBA) and SAFETY ANALYSES transient analyses in the UFSAR, Chapter 6 (Ref. 6) and Chapter 15 (Ref. 7),

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 sources is consistent with the initial assumptions of the accident analyses and is based upon meeting the design basis of the unit.

This includes maintaining the DC sources OPERABLE during accident conditions in the event of:

a.

An assumed loss of all offsite AC power or all onsite AC power: and

b.

A worst case single failure.

The DC sources satisfy Criterion 3 of 10 CFR 50.36 (c)(2)(ii).

LCO The DC electrical power subsystems, each subsystem consisting of two batteries, battery charger for each battery (the backup battery charger, one per train, may be used to satisfy this requirement),

and the corresponding control equipment and interconnecting cabling supplying power to the associated bus within the subsystem t are required to be OPERABLE to ensure the availability of the required power to shut down the reactor and maintain it in a safe condition after an anticipated operational occurrence (AOO) or a postulated DBA.

Loss of any tpa-? DC electrical power subsystem does not prevent the minimum safety function from being performed (Ref.

4).

Each DC electrical power subsystem (Train A or Train B) is subdivided into channels.

Train A consists of Channel A and Channel C. Train B consists of Channel B and Channel D.

Channel A includes 125 VDC bus PKA-M41, 125 VDC battery bank PKA-F11, and normal battery charger PKA-H11 or backup battery charger PKA-H15.

Channel C includes 125 VDC bus PKC-M43, 125 VDC battery bank PKC-F13, and normal battery charger PKC-H13 or backup battery charger PKA-H15.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-4 REVISION 0

DC Sources - Operating B 3.8.4 Channel B includes 125 VDC bus PKB-M42, 125 VDC battery bank PKB-F12, and normal battery charger PKB-H12 or backup battery charger PKB-H16.

Channel D includes 125 VDC bus PKD-M44, 125 VDC battery bank PKD-F14, and normal battery charger PKD-H14 or backup battery charger PKB-H16.

An OPERABLE DC electrical power subsystem requires all required batteries and respective chargers to be operating and connected to the associated DC bus(es).

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

a.

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

b.

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

The DC electrical power requirements for MODES 5 and 6, and during movement of irradiated fuel assemblies are addressed in the Bases for LCO 3.8.5, "DC Sources - Shutdown."

ACTIONS A.1, A.2, and A.3 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 (2.17 volts per cell (Vpc) times the number of connected cells or 130.2 V for a 60 cell battery at the battery terminals) within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

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 (e.g., backup Class 1E battery charger).

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 <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, the battery will be restored to its fully charged condition (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-5 REVISION 2

DC Sources - Operating B 3.8.4 (Required Action A.2) from any discharge that might have occurred due to the charger inoperabi lity.

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.

Me 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 goodassurance of fully recharging the battery within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, avoiding a premature shutdown with its own attendant risk.

If established battery terminal float voltage cannot be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, 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 <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> that is an indication that the battery is partially discharged and its capacity margins will be reduced.

Me time to return the battery to its fully charge~d condition in this case is a'function of the battery charger capacity, the amount of loads on the associate 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 <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> (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 charer, it is now fully capable of supplying the maximum epcted load requirement.

The 2 amp value is based on returning the battery to 95% charge and assumes a 5% design margin for the battery.

If at the expiration of the initial 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 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 A.3 limits the restoration time for the inoperable battery Charger to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

This action is applicable if an alternate means of restoring battery (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-6 REVISION 2

DC Sources - Operating B 3.8.4 terminal voltage to greater than or equal to the minimum established float voltage has been used (e.g., backup Class 1E battery charger).

The 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> Completion Time reflects a reasonable time to effect restoration of the required battery charger to OPERABLE status.

The loss of the two required (in-service) battery chargers on the same subsystem would be a degradation ot the subsystem beyond the scope oT Condition A, thus rendering the subsystem inoperable and requiring entry into Condition B.

BA. 1 Condition BA represents one subsystem t with a loss of ability to-completely respon to an event, and a potential loss of ability to remain energized during normal operation.

This condition is exclusive of the status of one battery charger.

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

-r-a!H.

The 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> limit is consistent with the alowed time for an inoperable DC distribution subsystem 44i-.

If one of the required DC electrical power subsystems is inoperable for reasons other than Condition A (exclusive Qf

,h.....,, the remaining DC electrical power subsystem has the capacity to support a safe shutdown and to mitigate an accident condition.

Since a subsequent worst case single failure would, however, result in the complete loss of the remaining 125 VDC electrical power subsystem with attendant loss of ESF functions, continued power operation should not exceed 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

The 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Completion Time is based on Regulatory Guide 1.93 (Ref. 8) and reflects a reasonable time to assess unit status as a function of the inoperable DC electrical power subsystem and, if the DC electrical power subsystem is not restored to OPERABLE status, to prepare to effect an orderly and safe unit shutdown.

Entry iRto CoRdition A is *n rcquicd -ith one of the rcquired~~~~

(i evie ateycagcr inoper-able.

When onc o-f thcp rpequired (in servic-e) batr haresisioerbe Crodi*tio*nC i s apprpr iate tenter The loss o9f tWo rter chargers o the m tin go Ld eadgaaino h tr-ain beyon9d the scoApe of Condition C, thus r-endering the train inoperable ;an reqi rngentr-y inRto Condi t! on A-.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-7 REVISION 2

DC Sources - Operating B 3.8.4 CB.1 and C4.2 If the inoperable DC electrical power subsystem (exe!Hsive of the batter* y charger) cannot be restored to OPERABLE status within the required Completion Time of Condition A the unit must be brought to a MODE in which the LCO does not apply.

To achieve this status, the unit must be brought to at least MODE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and to MODE 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />.

The allowed Completion Times are reasonable, based on operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems.

The Completion Time to bring the unit to MODE 5 is consistent with the time required in Regulatory Guide 1.93 (Ref. 8).

C.1 and C.2 Crdition 9 C repr.esets the loss of one of the required (in service) batter-y chargers and assumes that acton ill, be takPe immediately to restore char.ing capability to the battery with the al te.rate harger (i e. normal or backup..

Under nr-mal nplant load conditions, the loss of the'bttry chaGer-fo-1 1hu has a neg i gi ble effec-t oni~

therae battery' capacty/ and does; not impact the-DC-electricGal power subsytem' ca a

-- -~i]

ityt perform its DBA safety function.

immediately hloing the loss of the charaing capability, battery Ge*ll paramee-r may not-mýeet Categor A limitsl-:

bec.a.se these limis-assme that the battery is being char-ged at a MInimum float voltage. The I hor completionu (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-8 REVISION 2

DC Sources - Operating B 3.8.4 ACTIONS C.1 a*nd C.2 (c9ntiRnnu*ed*

T4me alloWS for Pe e*ta*blihing charging cGapabilt S"uch that Category A param~eter-s can be Met.

Opera~tio 9it the DG enlner.cal power subsystem battey char-inoperable 4S not a-lloYd for an Hneinte -per iod of time even when the battery cell parameters have hb-en wvrified to meet the 1 1m-1 n+ý n Category A l4imits o Table 3.8.6 1 The 21 hour2.430556e-4 days <br />0.00583 hours <br />3.472222e-5 weeks <br />7.9905e-6 months <br /> completion tl'r, mrn

)Amc r

m-Sl a nnk-h i-ha 4

f tmer t,'GGn,-.t thP m

'nl-l A

Pn-ihIP DC1 ePlpe**rcl po..er. su System battery charger in an OPERABLE status.

The ThG the two d 0R Sn-vlce) batter+

y char.gers.

9R

~L th sam tpu w

~deqation of the train beyond the cr-nscA r*- riti*-r~

i, t ar-larin the train 4...

l, oF",

kr nl,

• +,r, 4,,

Categor.y A lmits as specified in LCO 3.8.6, the short capab14iy of the battery is alo degraded anRd the batterzy must be declared inoperabl~e.

SURVEILLANCE SR 3.8.4.1 REQUIREMENTS Verifying battery terminal voltage while on float charge for the batteries helps to ensure the effectiveness of the battery chargers, which support the ability of the batteries to perform their intended function charging Sy\\cfam tn e a-bl Iht1Y-G4c thel hattnies ton peiArfom thei intended function.

Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery (or battery3, ce!)

and maintain the battery (r a-,b*atte......*Gel) in a fully charged state while supplying the continuous steady state loads of the associated DC subsystem.

On float charge, battery cel Ils 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 float voltage established by the battery manufacturer (2.17 volts per cell (Vpc) times the number of connected cells or 130.2 V for a 60 cell battery at the battery terminals). This voltage maintains the battery plates in a condition that supports maintaining the grid life.

The voltage r-equ.irem.en.ts r asd o the nominzr ig vo4

,ltage of the battery.ad are consiste*

t With the 4in4tal voltages assumedin the battery sizing (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-9 REVISION 56

DC Sources - Operating B 3.8.4 ca,"uI,-a-t-,.i*

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

SR 3.8.4.2 Deleted Visual inspection to detect corrosio of the battr cels and connections, orPm oeasoreiment of the resistace of each iter cel, inter rack, inter-tier, an terminal conn*ction, proVideS an nR-indicatin o-f phsicaljr-damage or abnormal deterioration th*at could otentia*ly degradef-bater perfrmane.

The limits established for this SR are based oRn calulation 1,2, 3ECPK2O7 Whirch statesG that 4 e'ver-y termi nRal conn~ectio weret dge te to 50[ 6 ohms,, there wol esufficient.

battery capacity to satisfy the nBA Duty Cycle (Ref. 13).

The Sur.vei.llance Frequeny is contrlled under the S urveil

-lnc Frequn*-

C oGntr ProgrwH-.

SR 3.8.4.3 Deleted Visya* inspec.tiHn of the batter*y cells, c1el

plate, and battery racks proevides ani indication of physical damage or abnormal deter-oration that could physical damage or-deteriorpation does, not necessarily rPepresent a failure of this SR. p-rovided an evaluation determines that the physical damage or deterAioration does not affect the OPERABILITý

• o the battern y (its ablitylt* o perform its design func-tion).

The SuvilneFrqec scontrolled underp the SR 3.8.4.4 and SR 3.8.4.5 Deleted Visual iýnspecto*

aRd resistance measur.em..

ents of inte cel, iter-rack, inter-tier-,

Rnd terminal connection pronvide an indicatioRn of physical damage or, abnr.mal deter-ioration that coul0d indicate deg.P-aded batfte.ayL condition.

The antiorrSion material1 is uised to help ensrFHe?94 good elecrica connections and to reduce terminal deterior-ationR.

(conti nued)

PALO VERDE UNITS 1,2,3 B 3.8.4-10 REVISION 56

DC Sources - Operating B 3.8.4 SURVEILLANCE SR 3.8.11 4 Ad ýR 3.8.41:5 944 REQUIREMENTS (continued)

The visual in.SPctý.ion for. co.rroion iS not intcnded t requir re;moval of Rnd inspemtiRon un,.der a-ch terinmal r-nnr--

n Thn

ýnma\\xi7 I T

nf

-% r hk I rn-a

-ncinn)-

ic m

preventive mai*tenance SR.

The pre.ence o visible Coros.ion does not necessarily repr.esent a failre of this SR provided visible corsion is r.emo.ved during perf or.man of SR 3.84-4--.

The con*et*ion reGistance limits Sor 3.89..5 is based on calcu,,ati on 1,2,3ECPK297 which stat-s that if every terminal connection were to degrade to 0 6SO ohms there wou~ld be sufficient battery c.apaity to satisfy the PBA Duty Cyele (Ref.

a).

The Surve!ilance Frequency-iscotroll!]d un~der the SurveillaePFeHqu*c CoRtrl Prgam.

SR 3.8.4.6 This SR verifies r-equires that eac-h required battery chapgqe be caal fsupyn 00 amps forp batteries A and B and 30n amps for batteries C and, and 125 V for > 8 hor...

These r.equirements ar.e bed on the design capacity of the battery chargers (Ref.

,).

According to Regulatory Guide T7327(Ref. 10), the battery charger supply is recommended PeqU-i-r-e4-to be based on the largest combined demands of the various steady state loads and the charging capacity to restore the battery from the design minimum charge state to the fully charged state, irrespective of the status of the unit during these demand occurrences.

The minimum required amperes and duration ensures that these requirements can be satisfied.

This SR provides two options. One option requires that each battery charger be capable of supplying the required amps at the minimum established float voltage for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

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 temperature to have stabilized and *o have been maintained for at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

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 (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-11 REVISION 56

DC Sources - Operating B 3.8.4 the battery service test and will need to be supplemented with additional loads. The duration For this test may be longer than the charger 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 5 2 amps.

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

This SR is modified bY a Note. The reason for c

the Note is that performing the Surveillance on t-he charger-creditedfo (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-12 REVISION 56

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

REQUIREMENTS OPERABILITY woulld pcrtur*b the elecr-ical distrb*uHtior sstem aRd challenge safety Systems.

This criction fpro m nrmmally performing the surveillance in MODEe 1, 2, 3 and A i

further amplified to allow npotions of the sur-veillaRnc t-be performed for the Pinrp-oe ot acb4---h-i-n OPERABILITY (e.g., post WorK testing fGolloWing corr.ectie, maiteance, co~rrec-tive modification, deficient o~r

-incomplete surve..ill.ce testing, and the unrticipated OPERABILIT cnes) proGvided an assessment deter-mines plan-Rt sfety i main4a-ined o enhanced.

This assessmeRt shall, as m-in-imum, consider the potenti1

• utcom"es a*d trniet associated with a failed par-tial suirveillance, a sur-ccsu partialI survillyP-ý anc r-e, anHd a pe r-tu6r-b atio of theG ofGt orost ytmwhen they arc tied together or-operateda indepaendnly, for the part+ial surveillane as..... wll asthe operator procedures avaý 1 be to cope wi th ths ou-t-comes.

These shall be measured agai* n

.st the avoided risk of a plant Shu.tdon. and start*u-t determine that plant Safety is mRain-taýined or enha*ned when por-tioes of the surveillanRe are perfored in MODE 1 2, 3 r-.

Risk is4ights or deterministic methods may be used for this assessment.r SR 3.8.4.7 A battery service test is a special test of battery capability, as found, to satisfy the design requirements (battery duty cycle) of the DC electrical power system.

The discharge rate and test length should correspond to the design duty cycle requirements as specified in Reference 4.

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

This SR is modified by two Notes.

Note 1 allows the performance of a battery pe.r.for-mane discharge test or a modified performance discharge test in SR 3.8.6.9 *48in lieu of a service test since beth the modified-performance discharge test parameters envelope-the service test.

The reason for Note 2 is that performing the Surve.illance would perturb the electrical distribution system and challenge safety systems.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-13 REVISION 56

DC Sources - Operating B 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SR 3.8.4.8 Deleted A battery.

perfo-rmance discharge test is a test of contan-t currnpt capacity of a batter-,

ormRally done in the

.As; found' codiinafe havling b4een !n ser-vice, to dzetect4 an cagei the c-apac-ity det~er-i-ee&byhe acceptance test. The-teSt isitn edt determine overall battery degradation due to age and use--

Thc, modifed performance discharg.e test is a simulated duty cycle conGsGting of jUSt tYo rates: the on e Rinute rate published for the battery or, the largest cuIrr-e loa of th dujty cy3clýe (buit in no case; lower-than the per-formance test rate), followed by the test r-Pate emP]Gyed fe. 4iahe performan~e test, bothfwhc envlpe the duity cy3c-le of the service test.

Since e ampreeG ho*rs emvd a r aed one minullte discharge rP--rese a very\\ Small nnpoti~* of the battery capacity, the test rate n be changed to that for the pePrGfrance test without conJmproing the resuilts of the performnce diseharge test.

A moHdified discharge test is a test of the battery capacity-and its ability to provide a high rate, short duration !ad (usually the highest rate f the duty cycle). This will often confirm +

thP atter.y's abiliy to meet the critical perioed of, the load duty cycle, in addition to determini ng tS percentage Of rated capacity.

Initial cRn4dions for the modified per-for-rance dischar-ge test should be ideti*Gca to those specified for, anservice tch-*

Either the battery3 perfor~manc-e dischargqe test or2 the modified p erfrmandrieh e test is aceptable forn performance disGharge tests may be used o csatISfy SR 3.8.4.8 while satis*ing the r.equiements of SR 32.84.7 at the same time, because the test parameters envelope the sepvi*e test described iR SR 3.8,47.

The acceptance criteria for this Sur-veillalnce are consisten wth IEEE 150 (Ref.9-

)

an 9d IEE

,,85 (Rf 5 These ppi-,pe.Rnes recRmmend that the battery be replaced if its capacity is", bel...o 880% of the manufactuer rating.

A capcit of 80% shows~qr thalt the battery ra4te of deterioration4 is increasing, evn -if there is a*mple capaity to meet the load regui rementS.

The SurveillI an e Frvequenc is controlleidk un10der the Surveiane Frequency' Contrl A]~Progam. If the battery sw degradation*!_,

or 4if the (continued)

PALO VERDE UNITS 1,2,3 B 3.8.4-14 REVISION 56

DC Sources - Operating B 3.8.4 SURVEILLANCE REQUIREMENTS SR 3.18(con~tiunucd) batter, haS ra*-hed R5% of is expected, 1fe and capacity i-s Frequency is reduc~ed to 12 months.

However-, if the -battý Py NHOWZb HH uyauatiR bULULI HUL riW~e 85UH1c 9O+b Uit expeUA~te life, the SurPVeillance FrequencY is only redued to 24 months for batteries that retain capacity Ž_ 100% of the maRufacture-'s rating.

Degradatin is indicated when te4 battery capacity drops by mor-e than 10% relative to its c-apac-ity on the previous performance test, or when i is T 1.

bel-ow the manufacturers r

atR,,--

This k SR s modified by a Note. The reason for-the Note is1 that perfo*m*ng the Survei{llance wHuld pert-rbh the elec-tric-a-l distrbi 1system and challenge safety systems.

REFERENCES

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

2. Regulatory Guide 1.6, March 10, 1971.

3.

IEEE-308-1974.

4.

UFSAR, Chapter 8.3.2.

5.

TFFFR IQR5 92 lonep 14R2. Deleted

6.

UFSAR, Chapter 6.

7.

UFSAR, Chapter 15.

8. Regulatory Guide 1.93., December 1974.

9.

IEEE 150 1995 Deleted

10.

Regulatory Guide 1.32, Revision 0, August 11, 1972.

11.

Regulatory Guide 1.129, Revision 1-2, February 4 2007.

12.

Design Basis Manual "Class 1E 125 VDC Power System".

13.

Calculations 1,2,3ECPK207 01/02/03-EC-PK-0207

14.

SDOC ENO5OB-AO0024, Installation, Operation and Maintenance Manual for Class 1E Batteries and Racks.

15.

EPRI TR-100248, Rev 2, Stationary Battery Guide:

Design, Application, and Maintenance, December 6, 200.

PALO VERDE UNITS 1,2,3 B 3.8.4-15 REVISION 48

DC Sources - Shutdown B 3.8.5 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.5 DC Sources -

Shutdown BASES BACKGROUND A description of the DC sources is provided in the Bases for LCO 3.8.4, "DC Sources ý'Operating."

APPLICABLE SAFETY ANALYSES The initial conditions of Design Basis Accident (DBA) and transient analyses in the UFSAR, Chapter 6 (Ref. 1) and Chapter 15 (Ref. 2), 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 initial assumptions of the accident analyses and the requirements for the supported systems' OPERABILITY.

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

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

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

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

In general, when the unit is shut down, the Technical Specification requirements ensure that the unit has the capability to mitigate the consequences of postulated accidents.

However, assuming a single failure and concurrent loss of all offsite or all onsite power is not required.

The rationale for this is based on the fact that many Design Basis Accidents (DBAs) that are analyzed in (continued)

PALO VERDE UNITS 1,2,3 B 3.8.5-1 REVISION I

DC Sources - Shutdown B 3.8.5 BASES APPLICABLE SAFETY ANALYSES (continued)

MODES 1, 2, 3, and 4 have no specific analyses in MODES 5 and 6.

Worst case bounding events are deemed not credible in MODES 5 and 6 because the energy contained within the reactor pressure boundary, reactor coolant temperature and pressure, and the corresponding stresses result in the probabilities of occurrence being significantly reduced or eliminated, and minimal in consequences.

These deviations from DBA analysis assumptions and design requirements during shutdown conditions are allowed by the LCO for required systems.

The DC sources support the equipment and instrumentation required to mitigate the Loss of Shutdown Cooling and Loss of RCS Inventory accidents analyzed -in response to NRC Generic Letter 88-17 "Loss of Decay Heat Removal."

The Generic Letter does not require the assumption of a single failure and concurrent loss of all offsite or all onsite power.

The DC sources satisfy Criterion 3 of 10 CFR 50.36 (c)(2)(ii).

LCO The DC electrical power subsystem as defined in this LCO consists of two batteries, one battery charger per battery and the corresponding control equipment and interconnecting cabling within the subsystem t-aziH.

The DC electrical power subsystem is required to ensure the availability of sufficient DC electrical power sources to operate the unit in a safe manner and to mitigate the consequences of postulated events during shutdown (e.g., fuel handling accidents).

In Modes 5 and & 6 and during movement of irradiated fuel assemblies, one DC electrical power subsystem, consisting of two batteries, one battery charger per battery and the corresponding control equipment and interconnecting cabling within the train, is required to be OPERABLE to support the requirements of LCO 3.8.10 "Distribution Systems - Shutdown".

This DC electrical power subsystem #-i-also supports the one required OPERABLE Diesel Generator specified in LCO 3.8.2 "AC Sources - Shutdown" on the corresponding same-train.

For situations where redundant trains o supported equipment are (continued)

PALO VERDE UNITS 1,2,3 PALO VERDE UNITS 1,2,3 B 3.8.5-2 REVISION 1 B 3.8.5-2 REVISION 1

DC Sources - Shutdown B 3.8.5 BASES LCO (continued) required to be OPERABLE by LCO 3.8.10, the necessary DC buses of that additional DC distribution subsystem t shall be energized by a minimum of *its associated battery charger or backup battery charger.

Should the minimum battery charger requirements not be maintained for that additional DC distribution subsystem tr-a-iR-required by LCO 3.8.10, then LCO 3.8.10 (Condition 'A')

would be applicable and not LCO 3.8.5.

This is because the requirements of LCO 3.8.5 would still be met (i.e. one OPERABLE DC electrical power subsystem maintained).

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

a.

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

b.

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

c.

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

Movement of spent fuel casks containing irradiated fuel assemblies is not within the scope of the Applicability of this technical specification.

The movement of dry casks containing irradiated fuel assemblies will be done with a single-failure-proof handling system and with transport equipment that would prevent any credible accident that could result in a release of radioactivity.

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

ACTIONS The Actions are modified by a Note that identifies required Action BA.2.3 is not applicable to the movement of irradiated fuel assemblies in Modes 1 through 4.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.5-3 REVISION 21

DC Sources - Shutdown B 3.8.5 BASES A.1, A.2 and A.3 Condition A represents one subsystem with one battery charger inoperable (e.g., the voltage limit of SR 3.8.4.1 is not maintained).

Mhe 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 (2.17 volts per cell (Vpc) times the number, of connected cells or 130.2 fV or a 60 cell battery at the battery terminals) within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

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. (e.g., backup Class IE battery charger).

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 <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, 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 attery.

Thus there is good assurance of fully recharging the battery within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, avoiding a premature shutdown with its own attendant risk.

If established battery terminal float, voltage cannot be restored to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, and the charger is not operating in the current-limit 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 <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> that is an indication that the battery is partialy discharged and its capacity margins w-171b reduced. 7The (continued)

PALO VERDE UNITS 1,2,3 B 3.8.5-4 REVISION 21

DC Sources - Shutdown B 3.8.5 BASES 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 <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> (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 thes resu`lt 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 95% charge and assumes a 5% design margin for the battery.

If at the expiration of the initial 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 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 A.3 limits the restoration time for the inoperable battery charger to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

This action is applicable if an alternate means of restorin battery terminal voltage to greater than or e ua to the minimum established float voltage has been used (e.g.,

ac u2 Class 1E battery charger).

The 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> Completion Time reflects a reasonable time to effect restoration of the qualified battery charger to OPERABLE status.

The loss of the two required (in-service) battery chargers on the same subsystem would be a degradation of the subsystem beyond the scope of ConditionA, thus rendering the subsystem inoperableand requiring entry into Condition B.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.5-5 REVISION 21

DC Sources - Shutdown B 3.8.5 BASES ACTIONS BA.1, BA.2.1, BA.2.2, BA.2.3, and BA.2.4 If two 125 VDC subsystems' trains' buses are required to be energized per LCO 3.8.10, of the two required subsystems r-a-i-m, the remaining buses with DC power available may be capable of supporting sufficient systems to allow continuation of CORE ALTERATIONS and fuel movement.

By allowing the option to declare required features inoperable with the associated DC power source(s) inoperable, appropriate restrictions will be implemented in accordance with the affected required features LCO ACTIONS.

For example, assume that the 'A' subsystem t-a-i-125 VDC sources are required to be OPERABLE per LCO 378.5.

Also assume that

.two SDC subsystems 4i-s are required to be OPERABLE and the corresponding 125VDC subsystems' traiRs' buses energized (i.e. PK system buses 'A' and 'C' for subsystem tpaiR 'A' and buses 'B' and 'D' for subsystem

-i-'B') per LCO 3.8.10.

Finally, assume that an electrical fault occurs on the PK system channel 'C' bus and the bus has been declared INOPERABLE.

The action of LCO 3.8.5 would allow declaring the corresponding SDC suction valve J-SIC-UV-653 INOPERABLE.

However the SDC system itself would not necessarily need to be declared INOPERABLE and this would allow CORE ALTERATIONS to continue.

However, in many instances, this option may involve undesired administrative efforts.

Therefore, the allowance for sufficiently conservative actions is made (i.e., to suspend CORE ALTERATIONS, movement of irradiated fuel assemblies, and operations involving positive reactivity additions).

The Required Action to suspend positive reactivity additions does not preclude actions to maintain or increase reactor vessel inventory, provided the required SDM is maintained.

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

If moving irradiated fuel assemblies while in MODES 1, 2, 3, or 4, the fuel movement is independent of reactor operations.

Therefore, inability to immediately suspend movement of irradiated fuel assemblies would not be sufficient reason to require a reactor shutdown.

These actions minimize probability of the occurrence of postulated events.

It is further required to immediately initiate action to restore the required DC electrical power subsystem and to continue.

this action until restoration is accomplished in order to provide the necessary DC electrical power to the unit safety systems.

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

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.5-6 REVISION 21

DC Sources - Shutdown B 3.8.5 BASES ACTIONS BA.1, BA.2.1, BA.2.2, BA.2.3, and BA.2.4 (continued)

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

Entry inte Condition A is not....

i 'rd

,i th one of the required (in Rsevic-e) battery c*har-g*er inopcr-ablc When onc of the rcquircd (in ser~vice) battcr crgr-is, inoperable, CGRdition B is app.... it to c*?tP. The loEs of two r-equircd (in ser.ice* battery chargers on the same tr-ain Woul, d be a dgadation of the train beyond the scope of Condition B, thus render-ing the train iRnper.able and requ i rin 1 -entr-y into Condition,A-B.1 and B.2 Condition B represents the loss of one of the required (in service) battery chargers and 8c!'assues hat action will be taken immediately to re store chai c9apabjilit to the battery with the alternate charger (i.e., normal or backup).

UInder normal plat lGad conditions, the less of the battenr.y chapgqe for

-:o* 1,hour has a negligible effect on the rated battery capaci.ty and does not impact the PC eleGtrical power subsystem's capability to perf*om its nBA safety function Tmm-ediately lfollong the loss of the chaqrgiG*caPabiliýy, battery cell parameters may not meet Catego*ry. A limits becGase these limit-s assume that thba httry is being charged at a mi*nimumfloat voltag.

The11 h

Cleio Time allos For

.e establishing charging capability such that Category A par~ameter-s can be met.

Oper-ationR With the PC electrical power subsystem battery charge; r

p inopable i

not allowed for an indefinite perio.

d of time even when the battery elel parameters have been ver-ified to meet the cateGory A limits of Table 3.8.6 1.

The 2< hours completion time provides a per-iod of timeF to correct the proble commen*surate With the importance*

o*f maintaining the PC eleGtrical power subsystem battery, chargr in an OPERABLE status.

The loss of the two r-equiired (in ser!vice) batter-y c-hargers on the sa.e train would be a degradation of the train beyond the scope of Condition B, thus e....d g-4,*

he--f.ai-"

4nperable ad requiring entry-into Connditinn A (conti nued)

PALO VERDE UNITS 1.2.3 B 3.8.5-7 REVISION 2

DC Sources - Shutdown B 3.8.5 BASES ACTIONS C-4 (continued)

If the? batteryý cell parametersG c-annot beP maintained wti Category A, limits as specified inq LCD3.6, the shor-t ter c ap a bý,"-iity of the bat*ery is a*o**

deýI r aded an i-d th,e,-' bAttr must be declared inoper-able.

SURVEILLANCE SR 3.8.5.1 REQUIREMENTS SR 3.8.5.1 states that Surveillances required by SR 3.8.4.1, 3.8.4.6, and 3.8.4.7 euq S..

P,.-

8.-4., are applicable in these MODES.

See the corresponding Bases for LCO 3.8.4 for a discussion of each SR.

This SR is modified by a Note.

The reason for the Note is to preclude requiring the OPERABLE DC sources from being discharged below their capability to provide the required power supply or otherwise rendered inoperable during the performance of SRs.

It is the intent that these SRs must still be capable of being met, but actual performance is not required.

REFERENCES

1.

UFSAR, Chapter 6.

2.

UFSAR, Chapter 15.

PALO VERDE UNITS 1,2,3 B 3.8.5-8 REVISION 2

Battery Ce-4 Parameters B 3.8.6 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.6 Battery Ce~-&4 Parameters BASES BACKGROUND This LCO delineates the limits on battery float current as well as electrolyte temperature, level, and float voltage, a

p~nd

.c avity for the DC power sub5-ystem sGarc-e 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 Battery Monitoring and Maintenance Program also implements a program specified in Specification 5.5.19 for monitoring various battery parameters.

The battery cells are of flooded lead acid construction with a nominal specific gravity of 1.215 +/- 0.010.

This specific gravity corresponds to an open circuit battery voltage of approximately 123 V for 60 cell battery (i.e., cell voltage of 2.07 volts per cell (Vpc) at the upper range of the specific gravity) (Refs. 6 and 7).

The open circuit voltage is the voltage maintained when there is no charging or discharging.

Optimal long term performance is obtained by maintaining a float voltage 2.17 to 2.25 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 135 V for a 60 cell battery as discussed in the UFSAR, Chapter 8 (Ref. 4).

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

1) and Chapter 15 (Ref. 2), assume 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 at least one subsystem *t.a-i-n of DC sources OPERABLE during accident conditions, in the event of:

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-1 REVISION 0

Battery Ge4 Parameters B 3.8.6

a.

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

b.

A worst case single failure.

Battery ee-ý-parameters satisfy Criterion 3 of 10 CFR 50.36 (c)(2)(ii).

LCO Battery £&4 parameters must remain within acceptable limits to ensure availability of the required DC power to shut down the reactor and maintain it in a safe condition after an anticipated operational occurrence (AO0) or a postulated DBA.

Battery parameter [lcctrl,,te (lvel And spcc.ific

gravit, an c,

oa voltage llmlts are conservatively established, allowing continued DC electrical system function even with Category A and B limits not met. Train A batteries are composed of Channel A and Channel C batteries.

Train B batteries are composed of Channel B and Channel D batteries.

(continued)

REVISION 0 PALO VERDE UNITS 1,2,3 B 3.8.6-2

Battery ý&

Parameters B 3.8.6 BASES (continued)

APPLICABILITY The battery e&-1-parameters are required solely for the support of the associated DC electrical power subsystems.

Therefore, battery parameter limits elecztolyte and cGl!

fat,,*,o j,& are only required whe-the DC power source is required to be OPERABLE.

Refer to the Applicability discussion in the Bases for LCO 3.8.4 and LCO 3.8.5.

ACTIONS A.,

A.2, aRd A.3 With onc or mopc battcries with one or-more battery Gel!

paraMetcrS not within limits (.e., Category2ý A limits no met or CAtegoY B lii tý s no't mcor C

,ateg*ory* A aRd B li*m*i not et)butWithinq the Cate~gory Climits specifie~d in Tabl 3..6 1 th bateryis degraded buit there is still sufficient capac ty to perform the intended function.

lhef P?

th A-1

• -*:t Pp~ui nHh Therefore, the a-ffected battepy,.

is not requre to b considered inoperable solely as a; result of Category A or B limitS

• nt met, and c-i-ont ed operatioR is permitted for a The pilot ell electrolyte level and float voitage arc r.equied to be verified to meet the Category 9 l withinR A hu (Required Action A..1).

This check will pronvder a quicnk indication of the status of the remainder Gf the battery cells.

One hour provides time to inspect the electrolyte level d to confirm the flot

.t g of the pilot -els.H r Onae u

i.s co..nsidered a reasonable amon of time to performithe requir erification.

VeriflcatioAn t the Che ategor. y C lms are met (Requir.e Action A. 2) provides assurance that during the tme oneeed) to VestoreI the parameters to the Category A nd B liIts, the batter-y will still be capable o-f-performin its intende~d function. A, period of 2< hour-s is aloe ocomplete the, initial verification because electrolyt1e? le-vel, temperature, cell float voltage, and specific gravity measur-ements mus be obtained for each connected Gel!. --T4-i-i-Rg to consideration both the time required to perform the required veriicaton ad te assurance that the battery cell parameters ape not severely degraded, this time 4iS considered reýasoable?. The verificaetion is repeated at7 day intervals unwPtilthe parameters ape retrdtoCatgr A andB liits.Thisper-iodic verificationis ositn with the normal Fr-equency of pilot :ell Surveillances.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-3 REVISION 0

Battery

&-4 Parameters B 3.8.6 BASES ACTIONS

^A, A.2, @nd,A.

(con tinu ed)

ConRtinu1ed oper-ation is only per-mitted for 31 days before battery cell parameters mulst be restored to withi Category' A and B limits.

With the considleration that, whil.e battery capacity is degraded, sufficient capacity exists t pePrGor the intended func.tion and to alloW time to fully restore the battery cell parameters to normal limits, this time is ac-eptable prior-to' deGlar-7 n t-he battery A.1, A.2, and A.3 With one or more cells in one battery in one subsystem

< 2.07'V, the battery cell is degraded.

Within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 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 J.8.6.4).

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

Therefore, the affected battery is not required to be considered inoperabe sole ly 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 <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Since the Required Actions only specify "perform," a failure of SR 3.8.4.1 or SR 3.8.6.4 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 3.8.6.4 is failed then there is no assurance that there is still sufficient battery capacity to perform the intended function and the 'battery Must be declared inoperable i mmedi ately.

B.1 and B.2 One battery in one subsystem with float current > 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 reflectin some loss of capacity.

Within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Vern ication of the (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-4 REVISION 56

Battery Qa-4 Parameters B 3.8.6 BASES 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 (2.17 volts per cell (Vpc) times the number of connected cells or 130.2 V for a 60 cell battery at the battery terminals) 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 <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 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.

The charge time can be extensive, and there is not adequate assurance that it can be recharged within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> (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 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 <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, the battery will be restored to its ful ly charged condition (Required Action [3.2) from any discharge that might have occurred due toa 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 fully charged state under this conditioh is simply a function ofthe amount of theprevious discharge and the recharge characteristic of the battery. Thus there is good assurance of fully recharging the battery within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, 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 indication of a substantially discharged battery and 12 (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-5 REVISION 56

Battery Geq4 Parameters B 3.8.6 BASES hours is a reasonable time prior to declaring the battery inoperable.

Since Required Action B.1 only specifies "perform," a failure of SR 3.8.4.1 acceptance criteria does not result in the Required Action not met.

However, if SR 3.8.4.1 is failed, the aoDropriate Condition(s), deoendinq on the cause of the failure, is entered..

C.1, C.2, and C.3 With one battery in one subsystem with one or more cells electrolyte level above the top of the lates, but below the minimum established desiqn limits, the battery still retains sufficient capacity to perform the intended function.

Therefore, the affected battery is not required to be considered inoperable solely as a result of electrolyte leve]lnot met.

Within 31 days the minimum established design limits for electrolyte level must be re-established.

Condition C is modified by a Note specifying that Required Action C.2 shall be completed if electrolyte level was below the top of the plates.

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

equired Actions C.1 and C.2 address this potential (aswell as Rrovisions in Specification 5.5.19, Battery Monitoring and aintenance Program).

They are moditied 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 <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> level is required to be restored to above the top of the plates.

The Required Action C.2 requirement to Veriny that there is no leakage by visual inspection and the Specification 5.5:19.b item to initiate action to equa ize and test in accordance with manufacturer's recommendation are taken from

.IEEE Standard 450(Ref 3).

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.

D.1 With one battery in one subsystem with pilot temperature less than the minimum established cell design limits, (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-6 REVISION.56

Battery

&-4 Parameters B 3.8.6 BASES 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 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.1 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 <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

F4.1 With one battery with any ore or more battery cell parameters outside the allowances of the Required Actions for Condition A, B, C. D, or E, P wh AJ, t40 G-ate*, 9 lmt o..

any cnected cell sufficient capacity to supply the maximum expected load requirement is not assured and the corresponding battery nC elec t'il power subsystem must be declared inopera

e.

Additionally, discovering 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 performii the intended functions. The battery must therefore be declared inoperable immediately.

9thep nnft n-* *l a1

,ý evt~erne G~npAif~nnS

'l I¢ ra'- t G

Pmtnl R~f~ 9 8

o the Required Ac-tions of C**

ltio, A within the required CompletionA Ti-me or average electroGlyte temper-atuire of r.epresentative cells falling below 60F, are also cause for immedaly-\\ rdeclaring the-asociat@ed DC electricl Ppwer subyse,(m inoperable.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-7 REVISION 56

Battery C-e4l-Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS SR 3.8.6.1 Deleted Thi-s SR v.."fies that Categor*

y A battery cell para.eter. arcI..

csistent ith I EEE A0 (Rtef 3,.

hich recommends egull ar bal-ttery.\\ inspct,,,-,lio*ns includling float voltage, spe.ifi gr.aviy, and elec-trolyte level of pilot ceplls.

The Surveillance Grqcc iscnrLled undcra the Surveillance Freuency Control r

Progra..

SR 3.8.6.2 Deleted The inspectioHn of lV.l.,

specific gra-viy and float voltage is consistent,it-h IEEE A50 (Ref q)

The SurVe..i*lan Frequency is controlled un1d0eta Sbr..eillance Frqncyn**\\

Contronl Program. In addit-ion withi days of a battery discharge 1

05 V or a battery overpc harpge > 150 V.

-the battery mu-1st beP demonstrated to meet Category B limits.

TransieRts, such as motor sta*rtig transi*es*R which mIa' momentarilýy cause battery voltage to droEp to !5 105-V. do not con)stbitte a batter2y discharge provide the battery terminal

,-ltage aRd float cu-.

-r-ent return to pre tr aRsieRt values. This inspec-tion is also consistent with IEEE 150 (Ref. 3), which reco.mends spec.ial inspec-tins following a severe discharge or overcharge, to ensure that no significant degr.adati.n of the battery ohccur.s as a consequence ofsuch discharge or qve~Gctned (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-8 REVISION 56

Battery Ge-i Parameters B 3.8.6 BASES SURVEILLANCE SR 3.8.6.3 REQUIREMENTS Deleted ThiS S,,prvl 1...cc verfi cat on that the average tem ue of representative

.lls. (a 10% representativ sample of available ccells for-each battery3 bank) is- Ž 64-4F is onn-sistent wiýth a r-ecommndatioRn of IEEE <50 (Ref. 3) which ng statesbatthery tempaturren of eletron lytes in representative ctell should be dete rmied ont a quaterly Lower than nrmalý temperatures act to inhibit or reduce battery capaciy. This SR end ses that the opargering iteprnatlrlS remain Within an acceiptable operating ryange This limit is based on ventdo usetomnl fr.

The SurveillancessFreqny i cortroalled uadPri the Survellanrce equency Cn-tro p rane.

SR 3.8.6.4 Verifying battery float current while on float charge is used to determine the state of chrge of the boattery.

eloat charge is the condition in which the charger is suppyng the continuous charg required to overcome t e 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 capabi lity to measure elsctrical currents in the expected range.

Mte mineimum resuired procedural time to measure battery float current will be 30 seconds or as recommended by the float current measurement instrument manufacturer. This minimum ;To-at current measurement time is required to rovide A more accurate battery float current reaing.

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

Use of float current to determine the state of charge of the battery is consistent with IEEE-450 The Surveillance Frequency is controlled under the SurveilIlance Frequency Control Program.

This SR is modified by a Note that states the float current requirement is not require to be met when battery termi-nal voltage is less than the minimum -established fl-o-at voltage of SR 3.8.4.1.

Jenthis float voltage is not maintained the Required Actions of LCO 3.8.4 Action A (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-9 REVISION 56

Battery Ge-4 Parameters B 3.8.6 BASES 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 whenthis voltage is not maintained.

SR 3.8.6.5 and SR 3.8.6.8 Optimal long term battery performance is obtained by maintaining a float voltage greater than or equal to the minimum established design limits provided by the battery manufacturer, which corresponds to 13U.2 V at the battery terminals, or 2.17 volts per cell (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 5.5.19.

SRs 3.8.6.5 and 3.8.6.8 require verification that the cell float voltages are equal to or greater than the short term absolute minimum voltage of 2.07 V.

Plant procedures must require verification of the selection of the pilot cell Or cells when performing SR 3.8.6.5.

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

SR 3.8.6.6 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 thebattery cell jar.

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

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-10 REVISION 56

Battery C-&4 Parameters B 3.8.6 BASES SR 3.8.6.7 This Surveillance verifies that the pilot cell temperature is greater than or equal to the minimum established design limit (i.e., 60°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.

Battery room temperature must be 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.

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

SR 3.8.6.9 A battery performance discharge test is a test of constant current capacity or a battery, normal ly 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 usaqe.

Either the battery performance discharge test or the modified performance discharge test is acceptable for satisfying SR 3.8.6.9 however, only the modified performance discharge test may be used to satistf the battery service test requirements of RK 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 (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 performance discharge test should be identical to those specified for a service test.

It may consist of just two rates: for instance the one minute rate for the battery or the largest current load of (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-11 REVISION 56

Battery Q&-4 Parameters B 3.8.6 BASES 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.

3) and IEEE-485 (Ref. 5).

These references recommend that the battery be replaced if its capacity is below 80% of the manufacturer's rating.

capacity of 80% shows that the battery 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 duty cycle loads when the battery design capacity reaches this 80% limit.

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

It the bttery shows degradation, or if the battery has reached 85% of its expected life and capacity is < 100% of the manufacturer's rating, the Surveillance Frequency is reduced to 12 months.

However, if the battery shows no degradation but has reached 85% of its expected life, the Surveil lance Frequency is only reduced to 24 months for batteries that retain capacity Ž 100% of the manufacturer's ratings.

Degradation is indicated, according to IEEE-450 (Ref.

3),

when the battery capacity drops by more than 10% relative to its capacity on the previous performance test or when it is Ž 10% below the manufacturer's rating. These Frequencies are consistent with the recommendations in IEEE-450 (Ref.

3).

This SR is modified by a Note.

The reason for the Note that performing the Surveillance would perturb the electrical distribution system and challenge safety systems.

Credit may be taken for unplanned events that is satisfy this SR.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-12 REVISION 56

Battery Ge4 Parameters B 3.8.6 BASES Tablc 3.8.6-1 Thie t-abcp delineatpes the lImits on electrolyte-leell floa4 voltage, and scii rvt o

he ifrn catqGories.

Thc Mcanig of cAc-hcaeoyidiusd Category A defines the normal par.ameter limit for each designated pilot cell in eaGh bat4e,4.

The *ells selected as pil4o cells are those Whose level, YGal electrolyte specific graviýt approximate the state of charge J

The Category A limits spec-ified for-electrolyte? level ar-e based on vendor recommendations and are consistent with the guidncein EEE~5O(Ref. 3), with teeta~ic alloance above the high water level iAndi cati on for opernto acout for temeratur(es and charged (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-13 REVISION 56

Battery e-i Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS e

-ffcts.

In addition to this alloWnRe, footnote (a) to T-ble 3.8.- 6 1 pemit the electolyte level to be above thE Tpecfied maximumA lemel during equaizi ngch-ag, pr.vided it is not ov er.floWing.

Tese liiS ensure that the plat suffer op hia damge and that aideqUate electro trnpsfer capability is maintained in the e t*,a f tr-anRsien conditions.

IEE 450 (Ref. 3 eomnsta lcrlt levelI redig should be made o

nla y

batter y

has been at float charge for at least 72 hGHPeS.~

The Categor-y A limit specified forh float voltage is Ž, 2.13,-

per-cell.

This value isbased on the batterdy vngdor E

recommendation whic-h sttsta rlngdoeaino cells

2. 1 V cA r c t f e ofc The Categor-y A limit specified for-specific gravity for each pilot cell is - 1.9090 (0.015 below the vendor-fully charge nominal Specific

.GAravity or a battersy charging currenHt that had stabilized- -At a low vaLue)

Thisvalueischar.

e tEr-isti of a charged cell with adequate capacity. Accor-ding to IEEE temperature of 770F (250C).

The specific-gravity r-eadings are corrected for actua elIectrol~yte temper-atur-e and level.

For each a4F (1.670G) above

-ooF (250C), 1 poit (9.901) is added 4o the reading:

grav-ty of the elero-lyt in a cetll increases ih a ls of water due to electrolysis or eapGPorat--m-r Categor-y 9 defines the nrGmal par-ameter-limits for each onnnnected cell ThE term "connnected cell'"

excludes anRy battey ce.ll that may be jumpered Gut-.,

The Category B limits specified or.

electr-lyte level aRd float ol-tage are the same as those specified fr Category*.A and have been disc.ssed above. Footnote (d) to Table 3.8.6 1 4s applic-able to Categor-y B float voltage. Footnote Wd4 requ.ire correction for average electro lte temperature. The e-.gry-'t B limit scif-..7lied for specific gravity for eac r~r,nnntc+-n r ol l 1

-ic

ý! 1 1 OF (f) 000f kn],.i 1-hon

,nnrln,-4,-,v 1,

j (continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-14 REVISION 37

Battery Ce-4 Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS Tabýe 3.8.6 1 W(c*ntlued) of All connected cell > 12905 (9.919 beloW the Vendr

,fully

charged, noia 4pcfic gravityl).

Thesea vau1es ar-E bae on vendors recommedations The minimum specific gra y

4 valuekw t'h..

• '-eqHie

f. nea~jl Ge4-lý 1~~ie ll j G G-highly charged or neWly installed cell will not mas o

degradation of the batter-y.

Category C defines the limit for, each connected cell ThGee values, although reduced, provide assuPrane that sufficient capacity exists to perform the intended function and m~aintain a magin f safety.

When any battery par-ameter is outside the Ctgry3 C limit, the assu~rane of sufficient capacity1 descibedabove no logqer exists and the battery must beý The Cate:gor C limi 9"n-t spe*-ified for2 electroyt lte vel (above the tGp oGf the plates and not overflowing) ensures that the r1tccci

+

ff Y-nc h ~,i c'1 (A~rc ~rA mi

+ i rl

+ri,

~c electron trasfer apability. The C.teg,-o,*r-, Allowable Value for fýoat voltage is based on ve,.o-r r-eommendations whi State that a cell vtGmage of 2.07 V Pr below, uRder float conHditlions and not czaused.by elevated temperature of the cel,1 indic-ates in--.tepnHal cel prolrems. and may lrelire cell The Cateanr'. C limit.- nfc............

ii c4 a.....it Ic-i_*

based on vendor recommendations (0.929 beiew the vendor recommended fully chargqed, nominal specific gravity). In F

...... c t;)

In addition to that limit, it is f-reqied that the speific-gravity for each connectedcell must# hbe n less than 0.020 below the average of all connected cells.

This limit esur.es that the effect of a highly chared or nHew Gell d9oe not mask over-all degra8dation of the batteryý.

Fqotnotes (b) and (G) to Table 3.8.6 1 arc applicable to Category A,, B, and C.

specific gravity.

Footnote (b) to Table 3.8.6 1 r

..qi res specific gqravity crrection for I l evel orprecin is not requir-ed when battery char.gi.h ng cuwrrentis 4S 2 amps on float cha-rge.

This current provides, in geRer-al, an indication f4 over*all batter-y Gcodition.

(continued)

PALO VERDE UNITS 1,2,3 B 3.8.6-15 REVISION 37

Battery Ge&-4 Parameters B 3.8.6 BASES SURVEILLANCE REQUIREMENTS Table 3.8.6 1 (continued)

Bec*auSe f Spei#fic graiy adientS that are produced durinýg the r-echargingp'rocess de-layc; of several days may occurP while wa ting for-the Spe. Gfi c.gravty to stabilize.

A

¢4-3k41U4-UT rc,*_

3 n

- -n I I I

-l I t

..tabilized charger cur is an acceptable alternative to

.spec.i gravity measur.ement for deteRinRg the state of charge.

This phenmen is diScSS.

in' EEE /50 (Ref. 3).

Footnote (C) to Table 3.8.6 1 al!ows the float charge current to be used as An alern.ate to specific. gr-ayty for up to 7 days following battery equalizing PrGharge.

Within 7 days, each conneRted cell's specif ig.avity must be measu-ed to confirm the state oef charge.

FollowinRg a minor-batteray rPecharge (such as equalizing charge that does not follow a deep discharge) specific-gravity gradients are not signqifiaRnt, and confrming measurements may be made in less tha 7 day"s.

REFERENCES

1.

UFSAR, Chapter 6.

2.

UFSAR, Chapter 15.

3.

IEEE-450-995--2002.

4.

UFSAR, Chapter 8.

5.

IEEE-485-1983, June 1983

6.

SDOC ENO50B-AO0024, Installation, Operation and Maintenance Manual for Class E batteries and Racks.

7.

EPRI TR-100248, Rev 2, Stationary Battery Guide:

Design, Application, and Maintenance, December 6, 2006.

PALO VERDE UNITS 1,2,3 B 3.8.6-16 REVISION 48 Revised (Clean) TS Pages 3.8.4-1 3.8.4-2 3.8.4-3 3.8.5-1 3.8.5-2 3.8.6-1 3.8.6-2 3.8.6-3 3.8.6-4 5.5-18 5.5-19

DC Sources - Operating 3.8.4 3.8 ELECTRICAL POWER SYSTEMS 3.8.4, DC Sources - Operating LCO

3.8.4 APPLICABILITY

The Train A and Train B DC electrical power subsystems shall be OPERABLE.

MODES 1, 2, 3, and 4.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A.

One battery charger on A.1 Restore battery 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> one subsystem terminal voltage to inoperable, greater than or equal to the minimum established float voltage.

AND A.2 Verify battery float Once per 12 current : 2 amps.

hours AND A.3 Restore battery 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> charger to OPERABLE status.

B. One DC electrical B.1 Restore DC electrical 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> power subsystem power subsystem to inoperable for reasons OPERABLE status other than Condition A.

C. Required Action and C.1 Be in MODE 3.

1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> associated Completion Time not met.

AND C.2 Be in MODE 5.

36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> PALO VERDE UNITS 1,2,3 3.8.4-1 AMENDMENT NO, 44-ý,

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.4.1 Verify battery terminal voltage is greater In accordance than or equal to the minimum established with the float voltage.

Surveillance Frequency Control Program SR 3.8.4.2 Deleted SR 3.8.4.3 Deleted SR 3.8.4.4 Deleted SR 3.8.4.5 Deleted SR 3.8.4.6 Verify each battery charger supplies In accordance

• 400 amps for Batteries'A and B and with the

• 300 amps for Batteries C and D at Surveillance greater than or equal to the minimum Frequency established float voltage for Ž 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

Control Program OR Verify each battery charger can recharge the battery to the fully charged state within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> 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)

PALO VERDE UNITS 1,2,3 3.8.4-2 AMENDMENT NO. 49,

DC Sources - Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEI LLANCE FREQUENCY SR 3.8.4.7 NOTES--------------

1.

The modified performance discharge test in SR 3.8.6.9 may be performed in lieu of SR 3.8.4.7.

2.

This Surveillance shall not be performed in MODE 1, 2, 3, or 4.

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

In accordance with the Surveillance Frequency Control Program SR 3.8.4.8 Deleted PALO VERDE UNITS 1,2,3 3.8,4-3 AMENDMENT NO. -ý99,

DC Sources -

Shutdown 3.8.5 3.8 ELECTRICAL POWER SYSTEMS 3.8.5 DC Sources - Shutdown LCO

3.8.5 APPLICABILITY

DC electrical power subsystem shall be OPERABLE to support the DC electrical power distribution subsystem(s) required by LCO 3.8.10, "Distribution Systems - Shutdown."

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

ACTIONS NOTE In MODES 1, 2, 3, and 4, Required Action B.2.3 is not applicable.

CONDITION REQUIRED ACTION COMPLETION TIME A.

One battery charger on A.1 Restore battery 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> one subsystem terminal voltage to inoperable, greater than or equal to the minimum established float voltage.

AND A.2 Verify battery float Once per 12 current s 2 amps.

hours AND A.3 Restore battery 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> charger to OPERABLE status.

(continued)

PALO VERDE UNITS 1,2,3 3.8.5-1 AMENDMENT NO.

DC Sources - Shutdown 3.8.5 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B.

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

for reasons other than Condition A.

OR OR B.2.1 Suspend CORE Immediately ALTERATIONS.

Required Actions and associated Completion AND Time of Condition A not met.

B.2.2 Suspend movement of Immediately irradiated fuel assemblies.

AND B.2.3 Initiate action to Immediately suspend operations involving positive reactivity additions.

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

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.5.1

---

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

The following SRs are not required to be performed:

SR 3.8.4.6 and SR 3.8.4.7.

For DC sources required to be OPERABLE, the In accordance following SRs are applicable:

with applicable SRs SR 3.8.4.1 SR 3.8.4.6 SR 3.8.4.7 PALO VERDE UNITS 1,2,3 3.8.5-2 AMENDMENT NO. 4-14,

Battery Parameters 3.8.6 3.8 ELECTRICAL POWER SYSTEMS 3.8.6 Battery Parameters LCO

3.8.6 APPLICABILITY

Battery parameters for the Train A and Train B electrical power subsystem batteries shall be within limits.

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 battery with one A.1 Perform SR 3.8.4.1.

2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or more battery cells float voltage AND

.<2.07 V.

A.2 Perform SR 3.8.6.4.

2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> AND A.3 Restore affected cell 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> voltage - 2.07 V.

B. One battery with float B.1 Perform SR 3.8.4.1.

2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> current > 2 amps.

AND B.2 Restore float current 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to n 2 amps.

(continued)

PALO VERDE UNITS 1,2,3 3.8.6-1 AMENDMENT NO. 44-ý,

Battery Parameters 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME

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

NOTE---------

Required Action C.2 Required Actions C.1 and shall be completed if C.2 are only applicable electrolyte level was if electrolyte level was below the top of plates.

below the top of plates.

C.

One battery with one C.1 Restore electrolyte 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or more cells level to above top electrolyte level of plates.

less than minimum AND established design limits.

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

AND C.3 Restore electrolyte 31 days level to greater than equal to

.minimum established design limits.

D.

One battery with pilot D.1 Restore battery pilot 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> cell electrolyte cell temperature to temperature less than greater than or equal minimum established to minimum established design limits, design limits.

E.

One or more batteries E.1 Restore battery 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> in redundant parameters for subsystems with batteries in one battery parameters not subsystem to within within limits, limits.

(continued)

PALO VERDE UNITS 1,2,3 3.8.6-2 AMENDMENT NO. 4-88,

Battery Parameters 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME F.

Required Action and F.1 Declare associated Immediately associated Completion battery inoperable.

Time of condition A, B, C, D or E not met.

OR One battery with one or more battery cells float voltage < 2.07 V and float current

> 2 amps.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.6.1 Deleted SR 3.8.6.2 Deleted SR 3.8.6.3 Deleted SR 3.8.6.4 NOTE---------------

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

Verify each battery float current is In accordance with 2 amps.

the Surveillance Frequency Control Program SR 3.8.6.5 Verify each battery pilot cell float In accordance with voltage is

Ž 2.07 V.

the Surveillance Frequency Control Program SR 3.8.6.6 Verify each battery connected cell In accordance with electrolyte level is greater than or equal the Surveillance to minimum established design limits.

Frequency Control Program (continued)

PALO VERDE UNITS 1,2,3 3.8.6-3 AMENDMENT NO. 4-89,

Battery Parameters 3.8.6 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE T

FREQUENCY SR 3.8.6.7 Verify each battery pilot cell temperature In accordance with is greater than or equal to minimum the Surveillance established design limits.

Frequency Control Program SR 3.8.6.8 Verify each battery connected cell float In accordance with voltage is Ž 2.07 V.

the Surveillance Frequency Control Program SR 3.8.6.9

---

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

This Surveillance shall not be performed in MODE 1, 2, 3, or 4.

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

Verify battery capacity is Ž 80% of the manufacturer's rating when subjected to a performance discharge test or modified performance discharge test.

In accordance with the Surveillance Frequency Control Program 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 battery has reached 85% of the expected life with capacity

, 100% of manufacturer's rating PALO VERDE UNITS 1,2,3 3.8.6-4 AMENDMENT NO. 4-99,

Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.18 Surveillance Frequency Control Program This program provides controls for Surveillance Frequencies.

The program shall ensure that Surveillance Requirements specified in the Technical Specifications are performed at intervals sufficient to assure the associated Limiting Conditions for Operation are met.

a.

The Surveillance Frequency Control Program shall contain a list of Frequencies of those Surveillance Requirements for which the Frequency is controlled by the program.

b.

Changes of the Frequencies listed in the Surveillance Frequency Control Program shall be made in accordance with NEI 04-10, "Risk-Informed Method for Control of Surveillance Frequencies," Revision 1.

c.

The provisions of Surveillance Requirements 3.0.2 and 3.0.3 are applicable to the Frequencies established in the Surveillance Frequency Control Program.

5.5.19 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 (RG),

with RG expectations and program provisions as identified below:

a.

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

1.

Battery temperature correction may be performed before or after conducting 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."

(continued)

PALO VERDE UNITS 1,2,3 5.5-18 AMENDMENT NO. 4-99,

Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.19 Battery Monitoring and Maintenance Program (continued)

4.

In Regulatory Guide 1.129, Regulatory Position 3, Subsection 5.4.1, "State of Charge Indicator," the following statements in paragraph (d) 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."

b.

The program shall include the following provisions:

1.

Actions to restore battery cells with float voltage

< 2.07 V;

2.

Actions to determine whether the float voltage of the remaining batery cells is Ž 2.07 V when the float voltage of a battery cell has been found to be

< 2.07 V;

3.

Actions to equalize and test battery cells that had been discoved with electrolyte level below the top of the plates:

4.

Limits on average electrolyte temperature, battery connection resistance, and battery terminal voltage; and

5.

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

PALO VERDE UNITS 1,2,3 5.5-19 AMENDMENT NO.