Text

Proposed Amendment No. 269 to Unit 1 & Amendment No. 236 to Unit 2: DC Electrical Power Systems Technical Specifications Rewrite - Response to Request for Additional Information (RAI)
	ML053630270
Person / Time
Site:	Susquehanna
Issue date:	12/15/2005
From:	Mckinney B; Susquehanna
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	PLA-5995, TAC MC5153, TAC MC5154
	Download: ML053630270 (150)
	v • d • e

4 Britt T. McKlnney PPL Susquehanna, LLC o* 'f Sr. Vice President & Chief Nuclear Officer 769 Salem Boulevard *0 Berwick,PA 18603

Tel. 570.542.3149 Fax 570.542.1504 G od btmckinney~pplweb.com fJ FJ *'

DEC 1 a 2005 "t TM U. S. Nuclear Regulatory Commission Attn: Document Control Desk Mail Stop OPl-17 Washington, DC 20555 SUSQUEHANNA STEAM ELECTRIC STATION PROPOSED AMENDMENT NO. 269 TO UNIT 1 LICENSE NPF-14 AND AMENDMENT NO. 236 TO UNIT 2 LICENSE NPF-22:

DC ELECTRICAL POWER SYSTEMS TECHNICAL SPECIFICATIONS REWRITE - RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION (RAI) Docket Nos. 50-387 PLA-5995 and 50-388

References:

1) PLA-5825, B. T. McKinney (PPL) to Document Control Desk (USNRC),

ProposedAmendment No. 269 to Unit I License NPF-14 and Amendment No. 236 to Unit 2 License NPF-22:DCElectricalPower Systems Technical Specifications Rewrite," datedNovember 9, 2004.

2) Letterfrom USNRC (R. V. Guzman) to B. T. McKinney (PPL), "Requestfor Additional Information (RAI) - SSES Units I & 2 DC ElectricalPower Systems TSTF-360 (TAC Nos. MC5153 and MC5154), " dated October 19, 2005.

In accordance with the provisions of 10 CFR 50.90, PPL Susquehanna, LLC submitted a request for amendment to the Technical Specifications (TS) for Susquehanna Units I & 2.

(Reference 1).

The purpose of this letter is to provide the PPL responses to the NRC RAI (Reference 2),

as documented in the enclosure to this letter. As a result of the RAI response, we have provided a revised amendment request. contains the revised Evaluation of Proposed Changes. Included are a revised description of proposed changes, technical analysis and regulatory analysis. The No Significant Hazards Consideration originally provided in Reference 1 has been revised due to the withdrawal of the proposed battery charger LCO and surveillance changes. The Environmental Consideration originally provided in Reference I is not affected by the revised documents contained herein. The revisions were necessary due to the withdrawal of the proposed battery charger LCO and surveillance changes (change numbers 1, 4, and 7) proposed in our original amendment request (Reference 1).

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Document Control Desk PLA-5995 Attachment 2 contains revised proposed Units 1 & 2, TS 3.8.4, 3.8.5, 3.8.6, and 5.5.13 pages. All pages from these TS sections have been provided for completeness. Please note that underlined text is added, strike-through text is deleted, and any blank pages that result from elimination of text in the final typed version of the TS will be placed at the end of the section and marked as "Intentionally Left Blank."

Attachment 3 contains the revised Units 1 & 2, Technical Specifications Bases (TSB)

Sections 3.8.4, 3.8.5, and 3.8.6, also revised, based on the RAI response, to be consistent with the proposed Technical Specification changes. These TSB sections have been provided for "Information Only" to provide completeness and assist NRC in its overall review of this amendment request.

The commitments resulting from this RAI response are documented in the individual responses to questions 1, 2, and 11 contained in the Enclosure to this letter and in . There are no other commitments associated with our original amendment request (Reference 1).

PPL plans to implement the proposed changes as soon as practical following NRC approval. Therefore, we request NRC complete its review by March 31, 2006 with changes to be implemented within 60 days of NRC approval.

Any questions regarding this request should be directed to Mr. Duane L. Filchner at (610) 774-7819.

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

Executed on: /3- Jv 05 B. T. McKinney

Document Control Desk PLA-5995

Enclosure:

PPL Susquehanna Responses to NRC Request for Additional Information Attachments: - Revised PPL Susquehanna Evaluation of the Proposed Changes - Revised Proposed Technical Specification Changes Units 1 & 2, (Mark-ups) - Revised Proposed Technical Specification Bases Changes Units 1 & 2, (Mark-ups) - List of Regulatory Commitments cc: NRC Region I Mr. B. A. Bickett, NRC Sr. Resident Inspector Mr. R. V. Guzman, NRC Project Manager Mr. R. Janati, DEP/BRP

ENCLOSURE TO PLA-5995 PPL SUSQUEHANNA - RESPONSES TO NRC REQUEST FOR ADDITIONAL INFORMATION (TSTF-360)

Enclosure to PLA-5995 Page 1 of 9 Responses to NRC Request for Additional Information (TSTF 360)

1. NRC OUESTION: The license amendment application indicates that the SSES 1 and 2, 250 volt-direct current (VDC) Division I subsystems were originally designed with two half-capacity battery chargers operating in parallel to equally share the connected loads. Recent analysis has determined that only one battery charger is necessary to supply these loads and it has the capacity to recharge the batteries within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . Therefore, credit is taken in this proposed change for these chargers as full capacity chargers. As such, either 250 VDC Division I subsystem battery charger is capable of performing the required design function and the other Division I battery charger is considered to be an installed spare charger.

a. Provide a draft revision to the SSES 1 and 2 Final Safety Analysis Report (FSAR) or a regulatory commitment to update the SSES 1 and 2 FSAR to address the above indicated new design for the 250 VDC Division I subsystem.

b. Provide the results of an evaluation/analysis demonstrating sufficient capacity and capability of the battery charger pursuant with the requirements of General Design Criterion (GDC) -17.

PPL RESPONSE:

a. PPL commits to revise the discussion of the 250 VDC Division I subsystem to address the new design (two full capacity chargers) in a future revision of the FSAR developed in accordance with the requirements of 10 CFR 50.71.

b. PPL calculations document that the existing Unit 1 and 2, ClasslE, Division I, 250 VDC batteries are C & D, type LCR-25 with 25 plates. The bounding discharge for these batteries would occur as a result of a discharge to the Design Basis Accident (DBA) load profiles in the FSAR.

This is equivalent to 377.7 Ampere-Hours. During operation at the normal battery charger float voltage of 264 VDC, the continuous load current is

-264 Amps with the largest non-continuous load being 74 Amps. The batteries are sized in accordance with IEEE Standard 485 methodology, using a temperature correction factor of 1.11, aging factor of 1.25, design margin of 1.0, minimum battery cell voltage of 1.78 volts/cell and battery electrolyte temperature of 600 F.

Enclosure to PLA-5995 Page 2 of 9 Each Division I, 250 VDC battery charger is rated at 300 Amps DC. When IEEE Standard 946-1992 is used to determine the minimum ampere rating of the battery charger, following a DBA discharge while supplying the continuous loads, with a battery recharge time of 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , the battery charger minimum ampere rating is calculated to be 281.3 Amps.

Therefore, one Division I, 250 VDC battery charger with a rating of 300 Amps is sufficient to re-charge the battery to the fully charged state within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , following a discharge to the DBA load profile while supplying the largest combined demands of the various continuous steady state loads and the GDC 17 requirement for sufficient capacity and capability is met.

2. NRC OUESTION: Section 8.3.2.1.1.4 of the SSES 1 and 2 FSAR states: "The capacity of each battery charger, or the combined capacity of both chargers in the case of Division 1, 250 VDC subsystem, is based on the largest combined demand of all the steady-state loads and the charger current required to restore the battery from the design minimum charged state to the fully charged state within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months for the plant batteries and within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months for the emergency diesel generator (EGD) "E" battery except for the 18 hour2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months recharge time required for 125 V DC subsystems." To periodically demonstrate this capacity, proposed Change 4 adds the following alternative surveillance requirement (SR): "Verify each battery charger can recharge the battery to the fully charged state within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months while supplying the largest combined demands of the various continuous steady-state loads, after a battery discharge to the bounding design basis event discharge state."

GDC-17 of Title 10 of the Code of FederalRegulations (10 CFR) Part 50, Appendix A, states: "The onsite electric power supplies, including the batteries, and the onsite electric distribution system, shall have sufficient independence, redundancy, and testability to perform their safety functions assuming a single failure." In addition, 10 CFR 50.36(b) states: "The Technical Specification will be derived from the analyses and evaluation included in the safety analysis report, and amendments thereto."

a. The 12, 8, or 18-hour recharge time established from analyses and evaluation included in the SSES 1 and 2 FSAR is different from the 24-hour recharge time included in proposed TS change 4. Provide justification (or clarification) for the apparent non-compliance with 10 CFR 50.36(b).

b. Information presented in the SSES 1 and 2 FSAR and the proposed TS changes relating to the design basis capacity/capability requirements for the battery charger are not clearly and consistently stated. Provide clarification.

Enclosure to PLA-5995 Page 3 of 9

c. Provide the results of the evaluation and analysis demonstrating sufficient testability pursuant with GDC-17 when using the proposed alternative SR for testing the battery charger.

d. Describe why the proposed alternative SR for testing the battery charger meets 10 CFR 50.36(b).

PPL RESPONSE:

a. The SSES FSAR Section 8.3.2.1.1.4 contains the following battery recharge times:

Plant batteries - 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , DG E battery- 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , and 125 VDC batteries - 18 hours2.083333e-4 days 0.005 hours 2.97619e-5 weeks 6.849e-6 months These are the currently described recharge times in the FSAR. These times do not yet reflect the results of the engineering calculations that determined a 24-hour recharge is acceptable for the 125 VDC and the 250 VDC Class lE station batteries. It is our normal practice to revise the FSAR following implementation of a modification or change to the Technical Specifications in order to maintain consistency between the physical plant, the analyzed plant, and the FSAR.

As stated in the response to Question 1 above, PPL commits to revise the FSAR Section 8.3.2.1.1.4 discussions to address the 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months recharge times in a future revision of the FSAR developed in accordance with the requirements of 10 CFR 50.71.

b. PPL has determined by calculation, and periodically verifies by battery charger capability testing, that each of the Class 1E, 125 VDC and 250 VDC battery chargers can meet its design basis capacity and capability requirements. As stated above, the FSAR discussion will be revised in a future revision of the FSAR developed in accordance with the requirements of 10 CFR 50.71.

c. The proposed alternative SR for testing the battery chargers has been withdrawn in the revised mark ups of Units 1 & 2 Technical Specification 3.8.4.2 (formerly identified as Change 4 in Attachment 1). Upon further review of our procedures for performing battery charger capability testing, it was determined that this alternative is not necessary and would not be utilized. Therefore, the requested evaluation results are not provided.

Enclosure to PLA-5995 Page 4 of 9

d. As stated in c. above,,the proposed alternative SR for testing the battery chargers has been withdrawn in the revised mark ups of Units 1 & 2 Technical Specification 3.8.4.2 (formerly identified as Change 4 in Attachment 1). Therefore, no further response is required.

3. NRC OUESTION: Section 4, Change 1 and 7, of the amendment application states: "...The primary role of the battery charger is in support of maintaining operability of its associated battery. This is accomplished by the charger being of sufficient size to carry the normal steady-state DC loads, with sufficient additional capacity to maintain the battery fully-charged..." The SSES 1 and 2 FSAR conveys that (1) the primary safety function of the battery charger is to provide DC control power for restoration of alternating current (AC) power following a loss of offsite power or station blackout event and (2) the charger is of sufficient size to carry all steady-state DC loads. Provide clarification with respect to these apparent inconsistencies between the application and SSES 1 and 2 FSAR.

PPL RESPONSE:

Proposed Changes 1 and 7 have been withdrawn in the revised markups of Units 1 and 2 Technical Specification 3.8.4. (Attachment 2). Discussions with NRC related to compliance of the spare battery charger with GDC 17 requirements have determined that this proposed change in LCO time is not warranted. Accordingly, the PPL Evaluation (Attachment 1) has been revised to reflect this revision and the inconsistencies in the subject discussion no longer exist.

Note that as a result of withdrawal of change 7, changes 8 and 9 are consequently also withdrawn.

4. NRC OUESTION: The amendment application for Change 1 and 7 indicates that these changes allow the use of a spare 125 VDC or 250 VDC battery charger in the event of an inoperable charger, or in the event of performing online maintenance or testing of a charger.

a. Provide a draft revision to the SSES 1 and 2 FSAR or a Regulatory Commitment to update the SSES 1 and 2 FSAR to address the design of the spare charger.

b. Provide the results of an evaluation/analysis demonstrating sufficient capacity, capability, independence, redundancy, and testability pursuant with the requirements of GDC-17 for the period of time when the spare charger is credited in the safety evaluation/analysis.

Enclosure to PLA-5995 Page 5 of 9 PPL RESPONSE:

a. Since the proposed changes 1 and 7 have been withdrawn in the revised markups of Units 1 & 2 Technical Specification 3.8.4. (Attachment 2) an update to the FSAR reflecting the use of the spare charger is not required.

b. As stated in a. above, proposed Changes 1 and 7 have been withdrawn in the revised markups of Units 1 & 2 Technical Specification 3.8.4.

(Attachment 2). Accordingly, there is no credit taken in the safety analysis for any connection of the spare charger, and the evaluation/analysis requested is not required.

5. NRC QUESTION: Section 4 of the application states: "...the battery can be restored from any discharge that may have occurred due to battery charger inoperability." Provide the bases and justification for this statement.

PPL RESPONSE:

This statement was made in reference to the use of a spare charger as discussed in Changes I and 7 in Section 4 of our application. Since these have been withdrawn in the revised markups of Units 1 and 2 Technical Specification 3.8.4 (Attachment 2), the requested justification is not required.

6. NRC QUESTION: The technical bases presented for Change 13F is not consistent with the proposed TS change. Provide clarification and the technical basis for the TS change.

PPL RESPONSE:

The technical basis discussed in the Technical Analysis (Section 4, Change 13F of Attachment 1) has been revised to be consistent with the proposed Technical Specification. We have changed Section 4 to state the following: "less than 2.07 V and float current greater than 2 Amps, the battery" in the Technical Analysis.

7. NRC QUESTION: When electrolyte level is found below the top of the plates, the technical basis allowing continued battery operability has not been described as part of the technical basis for Change 13C. Provide the technical basis for the proposed change.

Enclosure to PLA-5995 Page 6 of 9 PPL RESPONSE: ; i.

Approved TSTF-360, (Attachment 1) "Battery Primer for Nuclear Power Plants,"

dated January 7, 2000 discusses the difference between operability of the DC system and various battery performance parameters and suggested maintenance activities identified in IEEE Standard 450. The section of the primer, titled "Assumptions, Rules, Design Criteria" provides the requested technical basis in Statement 20 as follows: "When electrolyte levels are low, slightly below the top of plates, there is little change in capacity. The density of the acid increases with evaporation. This increase more than offsets the slight decrease in surface area."

This revised technical basis is provided in the Technical Analysis (Section 4, Change 13C of Attachment 1).

8. NRC QUESTION: Proposed Change 12 conveys that Category C parameter values and the actions associated with restoration of these values will be relocated to a licensee-controlled program. Provide clarification or justification for the relocation of Category C parameter values.

PPL RESPONSE:

The Category C parameter related to electrolyte level; i.e., the specific limiting value for electrolyte level, will be relocated to the Technical Requirements Manual (TRM) which is under the control of 10 CFR 50.59. The Technical Specifications require that electrolyte level be greater than or equal to the "minimum established design limits." Relocation of this parameter to the licensee-controlled program in the TRM allows flexibility to monitor and control the limit at values directly related to the battery's ability to perform its safety function.

The specific Category C limiting value for the minimum operating battery charging float voltage is relocated to the Technical Specification Bases, which are under the control of 10 CFR 50.59. The Technical Specifications require the battery charger to supply battery terminal voltage "greater than or equal to the minimum established float voltage." The battery manufacturer establishes this voltage to provide the optimum charge on the battery. This voltage will maintain the battery plates in a condition that supports maintaining the grid life. As such, the specific value of the "minimum established float voltage" can be adequately controlled outside of the Technical Specifications as described in the Technical Specification Bases (Attachment 3).

Enclosure to PLA-5995 Page 7 of 9

9. NRC QUESTION: Change 15 indicates that a licensee controlled program for maintenance and monitoring of batteries will be based on the recommendations of Institute of Electrical and Electronic Engineers, Inc. (IEEE) Standard 450-1995.

The SSES 1 and 2 FSAR currently indicates that maintenance and monitoring of batteries is based on the recommendations of IEEE Standard 450-1972 (and 450-1980 for the EDG "E" building).

Provide a commitment that maintenance and monitoring of batteries is based on the recommendations of IEEE Standard 450-1995 in the SSES FSAR. Describe and justify any exceptions to IEEE Standard 450-1995.

PPL RESPONSE:

PPL is currently committed to comply with IEEE Standard 450-1995 as described in FSAR Section 8.3.2.2.k. Per this FSAR section, the recommended practices of IEEE 450-1995 for maintenance, testing, and replacement of batteries are followed except for:

the acceptance criteria and the surveillance period of the measurement of the battery cell-to-cell connection resistance;

the test procedure and the test interval for the modified performance discharge test and the service test of the battery;

the visual inspection period of the battery.

These exceptions are currently addressed by the Technical Specification requirements. However, the parameters associated with these exceptions will be relocated to the new licensee controlled program, which is identified in proposed Technical Specification Section 5.5.13.

10. NRC QUESTION: Section 5.1 of the license amendment application indicates that a new program for maintenance and monitoring of batteries is being proposed and will be described in new TS Section 5.5.13, "Battery Monitoring and Maintenance Program." The description provided in the proposed new TS Section 5.5.13 limits itself to this program and is based on IEEE Standard 450-1995. Provide a description based on IEEE 450 for how each battery parameter will be maintained that is being transferred from TS to this new program.

Enclosure to PLA-5995 Page 8 of 9 PPL RESPONSE:

It is PPL's intent to establish a new licensee controlled battery monitoring and maintenance program based on the recommendations of IEEE 450-1995, to which PPL is committed in FSAR Sections 3.13 and 8.3.2.2.k. The following will be included as new Technical Requirements Manual surveillances applicable to each Class lE 125 VDC or 250 VDC battery:

General Appearance and Cleanliness;

Cracks in Cells or Leakage;

Checks for Corrosion at Terminals, Connectors, and Racks;

Pilot Cell Specific Gravity;

Specific Gravity of Each Cell;

Cell Condition as Defined in Annex E of IEEE 450-1995;

Cell-to-Cell Terminal Connection Detail Resistance;

Structural Integrity of the Rack.

Actions required as a result of out of tolerance conditions will be taken in accordance with the program requirements and documented in the plant corrective action program. Monitoring these parameters will provide continued assurance that each Class IE station battery is maintained at its current level of performance while allowing the Technical Specifications (and the licensed operators) to focus on parameter value degradations that approach (but continue to provide some margin to ) levels that may impact battery operability.

11. NRC OUESTION: The justification for Change 13 conveys that the battery is sized with margin such that while the battery is degraded, sufficient capacity exists to perform intended functions. Describe the extent of battery capacity margin available at the end of the batteries expected life [IEEE Standard 485 sizing criteria (design, aging, and temperature margins)]. Explain why (or how it is known) that this capacity margin is sufficient to allow the battery to perform its intended safety function. Identify the location in the SSES 1 and 2 FSAR (or provide a draft revision to the FSAR or a Regulatory Commitment to update the SSES 1 and 2 FSAR) which conveys the results of an evaluation / analysis demonstrating that the batteries have been sized with sufficient capacity (including margin for a degraded battery) pursuant with the requirements of GDC-17.

Enclosure to PLA-5995 Page 9 of 9 PPL RESPONSE:

Sizing calculations have been performed for each Class IE 125 VDC and 250 VDC station battery based on IEEE Standard 485 "Recommended Practice for Sizing Large Lead Storage Batteries". Each Class IE battery is sized with margins for temperature and age with the following typical margins, included in the sizing calculation:

temperature correction factor of 1.11 , corresponding to a temperature of 600 F;

aging factor of 1.25, which produces a battery designed to have 100%

capability to meet the safety functions as determined by its load profile discharge when it is at 80% of its rated design capacity at the end of its expected life;

design margin of 1.0.

Periodic capacity and service tests which discharge each battery to its DBA profile or beyond, confirm that the analysis for each battery is accurately predicted and demonstrated by actual performance during the tests.

FSAR Section 8.3.2.1.1.4 discusses the capacity of the Class IE 125 VDC and 250 VDC batteries and chargers. A future revision to this FSAR Section will provide additional information demonstrating that the batteries have been sized with sufficient capacity to meet GDC 17 requirements.

ATTACHMENT 1 TO PLA-5995 PPL SUSQUEHANNA EVALUATION OF PROPOSED CHANGES (REVISION 1)

UNITS 1 & 2 DC ELECTRICAL POWER SYSTEMS TECHNICAL SPECIFICATIONS REWRITE (TSTF-360)

1. DESCRIPTION

2. PROPOSED CHANGE

3. BACKGROUND 3.1 Current Regulatory Requirements 3.2 Description of the Current Requirements 3.3 Description of the Current Systems 3.4 Description of the Proposed Change (Detailed)

4. TECHNICAL ANALYSIS

5. REGULATORY ANALYSIS 5.1 No Significant Hazards Consideration 5.2 Applicable Regulatory Requirements/Criteria

6. ENVIRONMENTAL CONSIDERATIONS

7. REFERENCES

Attachment 1 to PLA-5995 Page 1 of 23 PPL EVALUATION

Subject:

Units 1 & 2 DC ELECTRICAL POWER SYSTEMS TECHNICAL SPECIFICATION REWRITE - Revision 1 Note: This evaluation has been revised based on PPL's response to the NRC letter of October 19, 2005 - Request for Additional Information (Reference 10). This revision replaces the PPL Evaluation (Enclosure to PLA-5825) included in the original amendment request.

1.0 DESCRIPTION

This is a request to amend Operating Licenses NPF-14 and NPF-22 for PPL Susquehanna, LLC (PPL), Susquehanna Steam Electric Station (SSES) Units 1 and 2. It represents proposed revisions to the SSES Technical Specification (TS) 3.8.4 "DC Sources - Operating," 3.8.5 "DC Sources - Shutdown,"

3.8.6 "Battery Cell Parameters," and addition of new TS Section 5.5.13 "Battery Monitoring and Maintenance Program." These changes are consistent with TSTF-360, Revision 1, (Reference 1), submitted to the NRC by the Technical Specifications Task Force (TSTF).

2.0 PROPOSED CHANGE

S The proposed changes are to TS Sections 3.8.4, 3.8.5, 3.8.6, and 5.5. The proposed changes consist of the relocation of several Surveillance Requirements (SRs) in TS Section 3.8.4 that perform preventive maintenance on the safety-related batteries, to a new licensee-controlled program. It is also proposed that TS Table 3.8.6-1, "Battery Cell Parameter Requirements," be relocated to the new licensee-controlled program, and specific actions with associated completion times for out-of-limits conditions for battery cell voltage, electrolyte level, and electrolyte temperature be added to TS Section 3.8.6. In addition, specific SRs are being proposed for verification of these parameters.

The new program that is being proposed for the maintenance and monitoring of station batteries is based on the recommendations of Institute of Electrical and Electronics Engineers (IEEE) Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications." These program requirements are identified in TS Section 5.5.13, "Battery Monitoring and Maintenance Program." All of the items proposed to be relocated will be contained within this new license controlled program, which will be located in the Technical Requirements Manual (TRM), and

Attachment 1 to PLA-5995 Page 2 of 23 incorporated by reference in the SSES FSAR. This change will make all relocated items subject to review under 10 CFR 50.59, "Changes, Tests and Experiments,"

to determine whether the proposed changes will require prior NRC review and approval. All changes are required to be reported to the NRC in accordance with 10 CFR 50.71(e), "Maintenance of Records, Making of Reports."

As stated above, these proposed changes are consistent with portions of TSTF-360, Revision 1 (Reference 1), submitted to the NRC by the Technical Specifications Task Force (TSTF). TSTF-360, Rev. 1, was approved by the NRC on December 18, 2000 (Reference 2), and has been incorporated into Revision 2 of NUREG-1433, "Standard Technical Specifications, General Electric Plants, BWR/4," issued by the NRC in June 2001, (Reference 3).

The proposed changes are described in detail in Section 3.4 below. They are consistent with submittals by Clinton (Reference 4), Limerick (Reference 5),

Dresden (Reference 6), Diablo Canyon (Reference 7), and Comanche Peak (Reference 8) which have received NRC approval. In addition, the issues identified in the Oyster Creek Request for Additional Information (Reference 9),

have also been addressed. The marked-up TS pages are provided in Attachment 2 to this submittal. The associated marked-up TS Bases pages are provided for information only in Attachment 3 to this submittal.

3.0 BACKGROUND

3.1 Current Regulatory Requirements SSES FSAR Section 8.3.2.2.1, Compliance with General Design Criteria, Regulatory Guides, and IEEE Standards, provides detailed discussion of SSES compliance with the applicable regulatory requirements and guidance. The proposed TS amendment does not alter the design or function of any DC electrical power subsystem, it does not result in any change in the qualification of any component, and it does not result in the reclassification of any component's status in the areas of shared, safety-related, independent, redundant, and physically or electrically separated.

In accordance with GDC 17 requirements for Electric Power Systems, the design of the Class IE DC electrical power subsystems provides sufficient capacity, capability, independence, redundancy, and testability to ensure the performance of safety functions assuming a single failure.

The existing SSES commitments to IEEE Standard 450, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications," reflect commitment to the 1995 edition of IEEE Standard 450.

Attachment 1 to PLA-5995 Page 3 of 23 3.2 Description of the Current Requirements TS Section 3.8.4. "DC Sources - Operating," requires that the Class IE 125 VDC and 250 VDC electrical power subsystems listed in Table 3.8.4-1 shall be operable in Modes 1, 2, and 3. Refer to FSAR Chapter 8.3.2, "DC Power Systems" for a detailed description of the SSES Class lE 125 VDC and 250 VDC electrical power subsystems.

Condition A states that in the event that a DC electrical power subsystem listed in the table becomes inoperable, the inoperable DC electrical power subsystem must be restored back to operable status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Condition B states that if the inoperable DC electrical power subsystem cannot be restored within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , the plant must be in Mode 3 within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and then be in Mode 4 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months .

Condition C requires verification (within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months ) that all ESW valves associated with Diesel Generator E (D/G E) are closed when the associated DC electrical subsystem is inoperable and the D/G E is not aligned to the Class lE distribution system.

Condition D states that when the D/G E is aligned and its associated DC electrical subsystem is inoperable, the D/G E must be declared inoperable within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Condition E only applies to Unit 2, TS 3.8.4 and it requires that with one or more Unit 1 125 VDC electrical power subsystems inoperable, the associated Unit 1 and common loads are required to be transferred to the corresponding Unit 2 DC electrical power subsystem within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . Further, the transferred Unit 1 and common loads are required to be restored to the corresponding Unit 1 DC electrical power subsystem within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months after the Unit 1 subsystem is restored to OPERABLE.

Note: The Unit 1 125 VDC loads and the 125 VDC loads common to both units, e.g., Emergency Service Water (ESW) and D/G controls, etc., are normally supplied by the Unit 1 125 VDC DC electrical subsystems. These common load circuits can be transferred to the Unit 2 125 VDC electrical power subsystems to assure the common load availability for Unit 2.

Condition F requires that the associated common loads be declared inoperable immediately if the required actions of Condition E are not met.

Attachment 1 to PLA-5995 Page 4 of 23 TS Section 3.8.4 has several Surveillance Requirements (SR) which demonstrate operability. The required SRs are as follows:

SR 3.8.4.1 requires that the 125 VDC battery terminal voltage be verified to be greater than or equal to 129 Volts (V) and that the 250 VDC battery terminal voltage be verified to be greater than or equal to 258 V every 7 days while the batteries are maintained on a float charge unless the battery is on equalize charge or has been on equalize charge at any time during the previous 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , in which case the surveillance frequency is 14 days.

SR 3.8.4.2 requires verification that no visible corrosion is present at each battery cell terminal and connector or that battery cell terminal and connection resistance is less than or equal to 50E-6 ohm, or less than or equal to 100.0 E-6 ohms at each cell terminal or connector with the calculated average resistance for the battery bank less than or equal to 50.0E-6 ohms. Verification of these values must be performed every 92 days.

SR 3.8.4.3 requires that battery cells, cell plates, and racks are verified to show no visual indication of physical damage or abnormal deterioration every 18 months.

SR 3.8.4.4 requires removal of all visible corrosion and verification that the battery cell-to-cell and terminal connections are coated with anti-corrosion material every 18 months.

SR 3.8.4.5 requires verification, every 18 months, of battery cell connection resistance to be less than or equal to 001E-6 ohms for any single connection and the calculated average resistance for the battery bank is less than or equal to 50.0 E-6 ohms.

SR 3.8.4.6 requires verification, every 24 months, that each required battery charger supplies its associated battery at the following rates for greater than 4 hour4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months s:

- Greater than or equal to 100 Amps for a 125 VDC battery at greater than or equal to 127.8 V;

- Greater than or equal to 300 Amps for a 250 VDC battery at greater than or equal to 255.6 V;

- Greater than or equal to 200 Amps for the 125 VDC Diesel Generator E battery at greater than or equal to 127.8 V.

Attachment 1 to PLA-5995 Page 5 of 23

SR 3.8.4.7 requires verification of battery capacity to be adequate to supply, and maintain in operable status, the required emergency loads for the design duty cycle by performance of a battery service test every 24 months. A note is provided which allows performance of the modified performance discharge test in SR 3.8.4.8 in lieu of the service test in SR 3.8.4.7 once per 60 months.

SR 3.8.4.8 requires verification that battery capacity is greater than or equal to 80% of the manufacturer's rating when the battery is subjected to a performance discharge test or a modified performance discharge test. This test must be conducted every 60 months and every 12 months when the battery shows degradation or has reached 85% of expected service life with capacity less than 100% of the manufacturer's rating, and every 24 months when the battery has reached 85% or the expected service life with capacity greater than or equal to 100% of the manufacturer's rating.

SR 3.8.4.9 (Unit 2 only) requires the SR's for the Unit 1 Specification 3.8.4 to be applicable. When Unit 1 is in Mode 4 or 5 or when moving irradiated fuel assemblies in the secondary containment, the Note to Unit 1 SR 3.8.5.1 is applicable.

TS Section 3.8.5, "DC Sources - Shutdown," requires the DC electrical power subsystems listed in Table 3.8.4-1 to be operable when in Modes 4 and 5, and during the movement of irradiated fuel assemblies in the secondary containment to support the DC electrical power distribution subsystem(s) required by LCO 3.8.8, "Distribution Systems - Shutdown."

Condition A states that in the event that one or more required DC electrical power subsystems listed in the table becomes inoperable, the inoperable DC electrical power subsystem must be declared inoperable immediately or core alterations must be suspended immediately, and movement of irradiated fuel in secondary containment must be suspended immediately, and actions must be initiated immediately to suspend operations having the potential to drain the reactor vessel, and action must be initiated immediately to restore the required DC electrical power subsystems back to operable status. This condition is modified by a note indicating that the condition does not apply to the DG E electrical power subsystem.

Condition B states that if the D/G E DC electrical power subsystem becomes inoperable while D/G E is not aligned to the Class IE distribution system, all ESW valves associated with D/G E must be verified closed within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

Attachment 1 to PLA-5995 Page 6 of 23 Condition C requires that if the D/G E DC electrical power subsystem becomes inoperable while D/G E is aligned to the Class lE distribution system, D/G E must be declared inoperable within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

For Unit 2 TS 3.8.5 only, Condition D states that if one or more required Unit 1 DC electrical power subsystems is inoperable, the affected required feature(s) is/are declared inoperable immediately. This action is followed by an OR statement that contains requirements to immediately suspend core alterations and movement of irradiated fuel assemblies in the secondary containment and initiate action to suspend operations with a potential for draining the vessel and initiate action to restore required DC electrical subsystem power to OPERABLE status.

These actions are followed by an OR statement that contains the requirement to immediately initiate action to transfer the Unit 1 and common loads to the corresponding Unit 2 DC electrical power subsystem and, within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months (after the Unit 1 DC electrical power subsystem is restored to OPERABLE status),

restore the Unit 1 and common loads to the corresponding Unit 1 electrical power subsystems or declare the associated Unit 1 and common loads inoperable. This condition is modified by a note, stating that it does not apply to the D/G E electrical power subsystem.

The SRs for TS Section 3.8.4 are applicable for demonstrating operability requirements for TS Section 3.8.5.

TS Section 3.8.6. "Battery Cell Parameters," requires that the battery cell parameters for the Class IE 250 V batteries and the Class lE 125 V batteries shall be within limits when the associated DC electrical power subsystems are required to be operable.

Condition A contains the requirement that if one or more batteries with one or more battery cell parameters are not within Category A or B limits, verification of pilot cell electrolyte level and float voltage to Category C limits must be made within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months and verification that battery cell parameters meet Category C limits within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months and once per 7 days thereafter, and battery cell parameters must be restored to Category A and B limits within 31 days.

Condition B requires an immediate declaration of battery inoperability if the required action and associated completion time of Condition A is not met, or one or more batteries with average electrolyte temperature of the representative cells are not within limitsj or one or more batteries with one or more battery cell parameters are not within Category C values.

Attachment 1 to PLA-5995 Page 7 of 23

- Category A Limits: This category defines the normal parameter limits for each designated pilot cell. The electrolyte level must be greater than the minimum level indication mark, and less than or equal to 1/4 inch above the maximum level indication mark. The float voltage must be greater than or equal to 2.13 V. The specific gravity of the pilot cell must be greater than or equal to 1.200.

- Category B Limits: This category defines the normal parameter limits for each connected battery cell. The electrolyte level must be greater than the minimum level indication mark, and less than or equal to 1/4 inch above the maximum level indication mark. The float voltage must be greater than or equal to 2.13 V. The specific gravity of the measured cell must be greater than or equal to 1.195 and the average specific gravity of all connected cells must be greater than or equal to 1.205.

- Category C Limits: This category defines the minimum acceptable parameter limits for each connected cell. The electrolyte level must be above the top of the plates and not overflowing. The float voltage must be greater than 2.07 V.

The specific gravity of the measured cell must be not more than 0.020 below the average of all connected cells and the average specific gravity of all connected cells must be greater than or equal to 1.195.

TS Section 3.8.6 has three SRs to demonstrate operability of the associated batteries. The required SRs are as follows:

SR 3.8.6.1 requires that the battery cell parameters be verified to meet Category A limits every 7 days.

SR 3.8.6.2 requires that the battery cell parameters be verified to meet Category B limits every 92 days, and once within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months after a battery discharge of less than 110 V for the 125 V batteries and less than 220 V for the 250 V batteries, and once within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months after a battery overcharge that is greater than 150 V for the 125 V batteries and greater than 300 V for the 250 V batteries.

SR 3.8.6.3 requires the verification that the average electrolyte temperature of representative cells is greater than or equal to 60TF every 92 days.

3.3 Description of the Current Systems Each unit has a 250 VDC electrical power system which consists of two separate and independent Class IE 250 VDC subsystems designated as Division I and Division II. Each 250 VDC division contains a battery bank of 120 lead calcium

Attachment 1 to PLA-5995 Page 8 of 23 cells having a nominal terminal voltage of 250 volts, a 250 VDC load center, and 250 VDC motor control centers to distribute power to connected Class IE and non-Class IE loads. In addition, each 250 VDC Division I subsystem has two full capacity battery chargers connected to the loads. The 250 VDC Division II subsystem has only one full capacity battery charger connected to the loads.

The 250 VDC Division I subsystems were originally designed with two half-capacity battery chargers operating in parallel to equally share the connected loads.

Recent analysis has determined that only one battery charger is necessary to supply these loads and it has the capacity to recharge the batteries within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Therefore, credit is taken in this proposed change for these chargers as full capacity chargers. As such, either 250 VDC Division I subsystem battery charger is capable of performing the required design function and the other Division I battery charger is considered to be an installed spare charger.

Only one 250 VDC battery charger was required to supply the loads in the original design of the 250 VDC Division II electrical power subsystems. Therefore, only one charger was provided in the system design; i.e., the 250 VDC Division II electrical power subsystem on each unit does not have a spare battery charger installed.

The 250 VDC electrical power subsystems on each unit supply the power required for larger DC loads such as motor driven pumps and valves, inverters for plant computer and vital 120V AC power supplies.

During normal operation, the 250 VDC loads receive power from the 250 VDC battery chargers with the batteries floating on the system. A loss of the AC power supply to the battery chargers results in the 250 VDC loads receiving power directly from the Class lE 250 VDC batteries. No operator action is required for this transfer because the battery banks are connected in parallel to the charger and they automatically assume the loads.

Each unit has a 125 VDC electrical power system which consists of four separate and independent Class lE subsystems designated as Subsystems A, B, C, and D.

Each of these 125 VDC electrical power subsystems contains a battery bank of 60 lead calcium cells having a nominal terminal voltage of 125 volts, a 125 VDC battery charger, a 125 VDC load center, and 125 VDC distribution panels to distribute power to connected Class 1E and non-Class lE loads. Each 125 VDC electrical power subsystem provides the control power for its associated Class IE AC power load group (designated as A, B, C, D) consisting of 4.16 kV switchgear, 480V load centers, and a standby diesel generator as discussed in FSAR Section 8.3.1. These 125 VDC subsystems also provide DC power to the engineered safety feature (ESF) valve actuation, diesel generator auxiliaries and controls, and plant alarm and indication circuits.

Attachment 1 to PLA-5995 Page 9 of 23 The "A" and "C" 125 VDC load group subsystems together are considered to be the 125 VDC Division I subsystem. Similarly, the "B" and "D" 125 VDC load group subsystems together are considered to be the 125 VDC Division II subsystem.

During normal operation, the Unit 1 and common 125 VDC loads receive power from the Unit 1 125 VDC battery chargers with the batteries floating on the system. The Unit 2 125 VDC loads are powered from the Unit 2 125 VDC battery chargers with the batteries floating on the system. The common 125 VDC loads, normally powered from the Unit 1 125 VDC electric power subsystems, can be transferred to the Unit 2 125 VDC electric power subsystems when necessary. A loss of the AC power supply to the battery chargers results in the 125 VDC loads receiving power directly from the Class IE 125 VDC batteries. No operator action is required for this transfer because the battery banks are connected in parallel to the charger and they automatically assume the loads.

Additionally, a Class lB 125 VDC battery is installed as a dedicated DC power supply for only the D/G E Class lE DC loads and the four motor operated valves used to align Emergency Service Water (ESW) to D/G E. The D/G E 125 VDC electrical power subsystem consists of a separate and independent Class 1E subsystem. This 125 VDC electrical power subsystem contains a battery bank of 60 lead calcium cells having a nominal terminal voltage of 125 volts, a 125 VDC battery charger, a 125 VDC motor control center, and a 125 VDC distribution panels to distribute power to connected Class lE loads.

Each 250 VDC or 125 VDC battery has adequate storage capacity to supply power to the required loads continuously for at least 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months as discussed in the FSAR, Section 8.3.2, "DC Power Systems."

The battery cells for a DC electrical power subsystem are sized such that the required battery capacity exists at 80% of the battery rating. The minimum voltage design limit is 210 V for the 250 VDC batteries and 105 V for the 125 VDC batteries.

Each battery charger of the 250 VDC and the 125 VDC electrical power subsystems 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 has sufficient capacity to restore the battery bank from the design minimum charge to its fully charged state within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months while supplying normal steady state loads.

Attachment 1 to PLA-5995 Page 10 of 23 The 250 VDC and the 125 VDC electrical power subsystems are required to be operable to ensure required power is available to shutdown the reactor and maintain it in a safe condition after an anticipated operational occurrence (AOO) or a postulated design basis accident (DBA). Loss of any single DC electrical power subsystem does not prevent the minimum safety function from being performed.

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

3.4 Description of the Proposed Changes LCO 3.8.4:

Change 1: A description of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 1A: Revise Table 3.8.4.1 by inserting "or" between the two Division 1 250 VDC battery chargers. (Note: This change was included in our original submittal PLA-5825, but was not described as a change.)

Change 2: Revise SR 3.8.4.1 to state, "Verify battery terminal voltages for the 125 V batteries and for the 250 V batteries are greater than or equal to the minimum established float voltage," and delete references to the values of >129 V and 2258 V on a float charge. Also, delete the note that states "The 7 day frequency is not applicable if the battery is on equalize charge or has been on equalize charge at any time during the previous 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ," and delete the corresponding "and 14 days" frequency associated with the note.

Change 3: Delete SR 3.8.4.2, SR 3.8.4.3, SR 3.8.4.4, and SR 3.8.4.5 from the SSES TS and relocate these tests to a licensee-controlled program (See Change 15). This will require renumbering SR 3.8.4.6 as SR 3.8.4.2 and SR 3.8.4.7 as SR 3.8.4.3.

Change 4: A description of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 5: Rename current SR 3.8.4.7 to SR 3.8.4.3 and provide clarification to the note for this SR relative to revised SR references and credit which may be taken for unplanned events that satisfy the SR.

Attachment 1 to PLA-5995 Page 11 of 23 Change 6: Relocate SR 3.8.4.8 to SR 3.8.6.6. The note for this relocated SR will be modified to state that credit may be taken for unplanned events that satisfy the SR.

LCO 3.8.5:

Change 7: A description of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 8: A description of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 9: A description of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 10: SR 3.8.5.1 is revised to eliminate reference to SR's 3.8.4.4, 3.8.4.5, 3.8.4.6, 3.8.4.7, and 3.8.4.8 which were removed by revision to LCO 3.8.4. Also, the note for SR 3.8.5.1 is revised to provide proper reference to SR's 3.8.4.2 and 3.8.4.3.

LCO 3.8.6:

Change 11: The title of TS Section 3.8.6 is revised to "Battery Parameters" and the LCO is revised to read, "Battery parameters for the Class lE 250 V batteries and Class lE 125 V batteries shall be within limits."

Change 12: Relocate TS Table 3.8.6-1 battery cell parameters and Condition A, to the proposed Battery Monitoring and Maintenance Program described in TS Section 5.5.13. This table provides the required actions to be taken when battery cell parameters are found to be outside TS Table 3.8.6-1 values.

Change 13: Condition A is replaced with five new conditions. These conditions, with their associated required actions, will provide compensatory actions for a specific abnormal battery condition. The conditions are:

A. Condition A addresses the condition where a battery bank in a specific 125 VDC electric power subsystem or 250 VDC electric power subsystem has one or more battery cells with a float voltage less than 2.07 V.

B. Condition B addresses the condition where a battery bank is found with a float current of greater than 2 Amps.

Attachment I to PLA-5995 Page 12 of 23 C. Condition C addresses the condition where a battery bank is found with the electrolyte level in one or more cells to be less than the minimum established design limits.

D. Condition D addresses the condition where a battery bank is found with a pilot cell electrolyte temperature less than the minimum established design limits.

E. Condition E addresses the condition where one or more batteries in redundant 125 VDC or redundant 250 VDC subsystems are found with battery parameters not within established design limits.

F. Current Condition B will be renamed as Condition F. The current Condition B consists of three separate entry conditions. As part of this proposed change, the last two entry conditions, (one or more batteries found with an average electrolyte temperature of the representative cell not within limits, and one or more batteries found with battery cell parameters not within Category C values) will be deleted. The deleted conditions will be replaced with a new condition requiring entry when one battery in a 125 VDC or a 250 VDC subsystem is found with one or more battery cells with a float voltage of less than 2.07 V and float current greater than 2 Amps.

Change 14: Current SR 3.8.6.1, SR 3.8.6.2, and SR 3.8.6.3 will be deleted and will be replaced with the following SRs that are required to support this change.

The Note has been removed from the SR frequency column regarding the 7 day Frequency requirement for these SRs and the 14 day Frequency requirement for a battery that has been on equalize charge.

A. SR 3.8.6.1 will require verification of each battery float current to be less than or equal to 2 Amps every 7 days.

B. SR 3.8.6.2 will require verification of each battery pilot cell to be greater than or equal to 2.07 V every 31 days.

C. SR 3.8.6.3 will require verification of each connected cell electrolyte level to be greater than or equal to the minimum established design limits every 31 days.

D. SR 3.8.6.4 will require verification of each battery pilot cell temperature to be greater than or equal to the minimum established design limits every 31 days.

E. SR 3.8.6.5 will require verification of each connected battery cell voltage to be greater than or equal to 2.07 V every 92 days.

F. SR 3.8.6.6. which is relocated from current SR 3.8.4.8 as previously described.

Attachment 1 to PLA-5995 Page 13 of 23 Change 15: A new program will be added to TS Section 5.5, "Programs and Manuals." New TS Page 5.0-18A is added for new TS Section 5.5.13, "Battery Monitoring and Maintenance Program," to provide for restoration and maintenance actions for station batteries that will be based on the recommendations of IEEE Standard 450-1995.

4.0 TECHNICAL SAFETY ANALYSIS OF THE PROPOSED CHANGES Change 1 and Change 7: An analysis of these changes is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change IA: Revise Table 3.8.4-1 by inserting "or" between the Division 1 chargers. (Note: This change was included in our original submittal PLA-5825, but was not described as a change.)

PPL calculations document that the existing Unit 1 and 2, Class IE, Division I, 250 VDC batteries are C & D, type LCR-25 with 25 plates. The bounding discharge for these batteries would occur as a result of a discharge to the Design Basis Accident (DBA) load profiles in the FSAR. This is equivalent to 377.7 Ampere-Hours. During operation at the normal battery charger float voltage of 264 VDC, the continuous load current is -264 Amps with the largest non-continuous load being 74 Amps. The batteries are sized in accordance with IEEE Standard 485 methodology, using a temperature correction factor of 1.11, aging factor of 1.25, design margin of 1.0, minimum battery cell voltage of 1.78 volts/cell and battery electrolyte temperature of 600 F.

Each Division I, 250 VDC battery charger is rated at 300 Amps DC. When IEEE Standard 946-1992 is used to determine the minimum ampere rating of the battery charger, following a DBA discharge while supplying the continuous loads, with a battery recharge time of 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , the battery charger minimum ampere rating is calculated to be 281.3 Amps.

Therefore, one Division I, 250 VDC battery charger with a rating of 300 Amps is sufficient to re-charge the battery to the fully charged state within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months , following a discharge to the DBA load profile while supplying the largest combined demands of the various continuous steady state loads and the GDC 17 requirement for sufficient capacity and capability is met.

Change 2: Removal of specific value for the minimum established float voltage.

The specific limiting values for the minimum operating battery charging float voltages in SR 3.4.8.1 will be relocated to the TS Bases. Changes to the TS Bases

Attachment 1 to PLA-5995 Page 14 of 23 are under the control of 10 CFR 50.59, "Changes, Tests, and Experiments". The TS will require the battery charger to supply battery terminal voltage "greater than or equal to the minimum established float voltage". The battery manufacturer establishes this voltage to provide the optimum charge on the battery. This voltage will maintain the battery plates in a condition that supports maintaining the battery grid life. As such, the "minimum established float voltage" values can be adequately controlled outside of the Technical Specifications. Additionally, the surveillance to verify battery terminal voltages is required every 7 days.

Therefore, the note regarding surveillance frequency and the 14-day surveillance frequency requirement are no longer necessary and can be removed.

Change 3: Relocation of preventive maintenance SRs to Licensee -

Controlled Programs In accordance with SR 3.0.1, when any SR is not met, the LCO is not met. This is based on the premise that SRs represent the minimum acceptable requirements for Operability of the required equipment. However, for SR 3.8.4.2, SR 3.8.4.3, SR 3.8.4.4, and SR 3.8.4.5, failure to meet the SR does not necessarily mean that the equipment is not capable of performing its safety function, and the corrective action is generally a routine or preventive maintenance-type activity. For example, the Bases for SR 3.8.4.4 identifies removal of visible corrosion and tightening of terminal connections as a preventive maintenance activity. SR 3.8.4.3 requires the visible inspection for physical damage or deterioration that could potentially degrade battery performance. This is not required for the battery to perform its safety function, rather it reflects ongoing preventive maintenance activities. These activities are inappropriate for SRs and are generally controlled more effectively in the maintenance programs for batteries. With regard to the resistance verifications of SR 3.8.4.2 and SR 3.8.4.5, the values are nominal values and represent values at which some action should be taken, not necessarily when the operability of the battery is in question. The safety analyses do not assume a specific battery resistance value, but typically assume the batteries will supply adequate power.

Therefore, the key issue is the overall battery resistance. Between surveillances, the resistance of each battery cell connection varies independently from all the others. Some of these connection resistances may be higher or lower than others, and the battery may still be able to perform its function and should not be considered inoperable solely because one connector's resistance is high. Overall resistance is a direct impact on operability and is adequately determined as acceptable through completion of the battery service and discharge tests.

Therefore, these activities are more appropriately controlled under the maintenance program for batteries. Since these surveillances are recommended by IEEE Standard 450-1995, they will be addressed by the new Battery Monitoring and Maintenance Program described in the proposed TS Section 5.5.13 which is discussed below under Change 15.

Attachment 1to PLA-5995 Page 15 of 23 Change 4: An analysis of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 5: Revision of SR 3.8.4.7. Current SR 3.8.4.7 is renamed to be SR 3.8.4.3 due to the elimination of SR's 3.8.4.2, 3.8.4.3, 3.8.4.4, 3.8.4.5 and the renaming of 3.8.4.6 to 3.8.4.2 discussed in Change 4 above. This is an editorial change. Additionally, the Note in this surveillance is clarified to allow credit to be taken for the surveillance, due to unplanned events, to satisfy the new SR 3.8.4.3.

Change 6: Relocate SR 3.8.4.8 to SR 3.8.6.6. The note for this relocated SR will be modified to state that credit may be taken for unplanned events that satisfy the SR. Relocation of this SR is considered editorial in that it demonstrates the operability of the battery and is therefore proposed to be included in TS Section 3.8.6 related to battery operability.

Change 8: An analysis of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 9: An analysis of this change is not required as a result of its withdrawal in response to the RAI (Ref. 10).

Change 10: This is an editorial change to SR 3.8.5.1 in that it eliminated reference to SR's 3.8.4.4, 3.8.4.5, 3.8.4.6, 3.8.4.7, and 3.8.4.8 which were removed by revision to 3.8.4 discussed in Change 3 above. The revision to the note for SR 3.8.5.1 is necessary to provide proper reference to newly designated SR's 3.8.4.2 and 3.8.4.3.

Change 11: Delete reference to "Cell" in LCO 3.8.6.

This is an editorial change. This LCO is intended to require and define the operability requirements of the Class lE 250 VDC and Class IE 125 VDC batteries, and are not limited to Battery Cell Parameters or performance.

Change 12: Relocate TS Table 3.8.6-1 to a licensee-controlled program.

TS Table 3.8.6-1 contains various levels (i.e., Categories) of limitations on battery cell voltage, electrolyte level, and specific gravity parameters.

The Category A and B limits reflect nominal fully charged battery parameter values. Significant margin above that required for declaration of an operable battery is provided in these values. These Category A and B values represent appropriate monitoring levels and an appropriate preventive maintenance level of long-term battery quality and extended battery life. These values do not reflect the

Attachment 1 to PLA-5995 Page 16 of 23 10 CFR 50.36, "Technical Specifications," criteria for LCOs of "the lowest functional capability or performance levels of equipment required for the safe operation of the facility."

Category C defines the limits for each connected cell. These values, although reduced, provide assurance that sufficient capacity exists to perform the intended function and maintain a margin of safety. When any battery parameter is outside the Category C limits, the assurance of sufficient capacity no longer exists and the battery must be declared inoperable.

It is proposed that these parameter values and the actions associated with restoration of these values be relocated to a licensee-controlled program that is under the control of 10 CFR 50.59. This licensee-controlled program is discussed in Change 15 below.

Change 13: Addition of specific actions to LCO 3.8.6 replacing the existing Condition A actions and increased Completion Times for out-of-limit conditions for batteries and the associated SRs.

Specific Required Actions are proposed for parameters that have a unique impact on the battery and its continued operability. These proposed changes provide specific Required Actions and increased Completion Times for out-of-limit conditions for cell voltage, electrolyte level, and electrolyte temperature. These allowed times recognize the margins available, the minimal impact on the battery capacity and the capability to perform its intended function, and the likelihood of effecting restoration in a timely fashion, thus avoiding an unnecessary plant shutdown. In addition, SRs are proposed to verify that the batteries are maintained within the established limitations.

The bases for the specific actions are as follows:

A. Condition A addresses a condition where a specific battery has one or more battery cells with a float voltage less than 2.07 V. If a battery cell is found to be less than 2.07 V, the battery cell must be considered degraded. Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , verification of the required battery charger operability is made by monitoring the battery terminal voltage (i.e., performance of SR 3.8.4.1), and determining the overall battery state of charge by monitoring the battery float charge current (i.e., performance of SR 3.8.6.1). These actions assure that there is sufficient battery capacity to perform the intended function. Therefore, the affected battery is not required to be considered inoperable solely as a result of one or more cells in one or more batteries being less than 2.07 V, and continued operation is permitted for a limited period up to 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . This is considered a reasonable time to effect restoration of the out-of-limit condition.

Attachment 1 to PLA-5995 Page 17 of 23 B. Condition B addresses a condition where a battery is found with a float current greater than 2 Amps, which indicates that a partial discharge of the battery capacity has occurred. This may be due to a temporary loss of a battery charger or possibly due to one or more battery cells in a low voltage condition reflecting some loss of capacity. Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , verification of the required battery charger operability is made by monitoring the battery terminal voltage (i.e., performance of SR 3.8.4.1). If the terminal voltage is found to be less than the minimum established float voltage there are two possibilities, the battery charger is inoperable or is operating in the current limit mode. If the battery charger is found to be inoperable, LCO 3.8.4 Condition A would be entered. If the battery charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery has been substantially discharged and likely cannot perform its required design functions.

C. Condition C addresses a condition where a battery is found with the electrolyte level in one or more cells to be less than the minimum established design limits. With the electrolyte level in one or more cells found above the top of the battery plates, but below the minimum established design limits, the battery still retains sufficient capacity to perform the intended function. Therefore, the affected battery is not required to be considered inoperable solely based on electrolyte level. Within 31 days, the minimum established design limits for electrolyte level must be restored.

With electrolyte level below the top of the plates there is a potential for dryout and plate degradation. However, when electrolyte level is low, below the top of the plates, there is little change in capacity. The density of the acid increases with evaporation and this increase more than offsets the slight decrease in plate surface area. Required Actions C.1 and C.2 restore the level and ensure that the cause of the loss of electrolyte level is not due to a leak in the battery casing. These actions are only required if the level in the battery is found below the minimum established level limit.

D. Condition D addresses the condition where a battery is found with a pilot cell electrolyte temperature less than the minimum established design limits. Low electrolyte temperature limits the current and power available from the battery.

However, since the battery is sized with margin, while battery capacity is degraded, sufficient capacity exists to perform the intended functions.

Therefore, the affected battery is not required to be considered inoperable solely as a result of the pilot cell temperature not met, and the 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months provides a reasonable time to restore the temperature within established limits.

E. Condition E addresses the condition where one or more batteries in redundant 125 VDC or redundant 250 VDC subsystems are found with battery parameters not within established design limits. Given this condition, there is not

Attachment 1 to PLA-5995 Page 18 of 23 sufficient assurance that battery capacity has not been affected to the degree that the batteries can still perform their required function. Since redundant batteries are involved, this potential could result in a total loss of function on multiple systems that rely upon the batteries.

F. If the Required Actions and associated Completion Times of Conditions A, B, C, D, or E are not met, or if there are one or more battery cells with float voltage less than 2.07 V and float current greater than 2 Amps, the battery must be declared inoperable immediately. If float voltage is satisfactory and there are no cells less than 2.07 V, there is assurance that within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months the battery will be restored to its fully charged condition from any discharge that might have occurred due to a temporary loss of the battery charger.

Change 14: Current SR 3.8.6.1, SR 3.8.6.2, and SR 3.8.6.3 will be deleted and will be replaced with the following SR's:

A. SR 3.8.6.1 will require verification that the float current for each battery is less than or equal to 2 Amps every 7 days. This is used to determine the state of charge of the battery. Float charge is the condition in which the charger is supplying the continuous small amount of current; i.e., less than 2 Amps required to overcome the internal losses of a battery to maintain the battery in a charged state. The float current requirements are based on the float current indicative of a charged battery. The use of float current to determine the state of charge of the battery and the 7-day frequency for performance of this verification is consistent with IEEE Standard 450-1995.

B. SR 3.8.6.2 and SR 3.8.6.5 verify that the float voltage of either pilot cells and all connected cells are equal to or greater than the short-term absolute minimum voltage of 2.07 V. This voltage level represents the point where battery operability is in question. Optimal long-term battery performance is obtained by maintaining a float voltage greater than or equal to a minimum established float voltage, which is established and controlled in accordance with the proposed Battery Monitoring and Maintenance Program provided in TS Section 5.5.13. The Battery Monitoring and Maintenance Program will provide necessary actions if the battery float voltage is found to be less than the minimum established float voltage but greater than the short term absolute minimum voltage of 2.07 V. The Frequency for cell voltage verification every 31 days for pilot cell and 92 days for each connected cell is consistent with IEEE Standard 450-1995.

C. SR 3.8.6.3 verifies that the connected cell electrolyte level of each battery is greater than or equal to the minimum established design limits established in the proposed Battery Monitoring and Maintenance Program provided in TS Section 5.5.13. Operation of the batteries at electrolyte levels greater than the

Attachment 1 to PLA-5995 Page 19 of 23 minimum established design limit ensures that the battery plates do not suffer physical damage and continue to maintain adequate electron transfer capability.

The Frequency of every 31 days is consistent with IEEE Standard 450-1995.

D. SR 3.8.6.4 verifies the temperature of each battery pilot cell to be greater than or equal to the minimum established design limits established in the proposed Battery Monitoring and Maintenance Program provided in TS Section 5.5.13.

Maintaining the electrolyte temperature above this level ensures that the battery can provide the required current and voltage to meet the design requirements, since temperatures that are lower than assumed in the battery sizing calculations act to inhibit or reduce the overall battery capacity. The Frequency of every 31 days is consistent with IEEE Standard 450-1995.

Change 15: Addition of licensee-controlled program for maintenance and monitoring of batteries.

This program will be based on the recommendations of IEEE Standard 450-1995.

This program will contain the elements relocated from the affected TS LCOs. The parameter values will continue to be controlled at their current level, and actions will be implemented in accordance with the plant corrective action program.

Furthermore, the battery and its preventive maintenance and monitoring are under the regulatory requirements of the Maintenance Rule, 10 CFR 50.65. This relocation will continue to assure the battery is maintained at current levels of performance, while allowing the TS to focus on parameter value degradations that approach values which may impact battery operability.

All of the items proposed to be relocated within this new program will be contained in the Technical Requirements Manual (TRM), which is incorporated by reference in the SSES FSAR. This will make all changes subject to review under 10 CFR 50.59, "Changes, Tests, and Experiments," to determine if the proposed changes will require prior NRC review and approval, and will require reporting of all changes to the NRC in accordance 10 CFR 50.71(e), "Maintenance of Records, Making of Reports."

5.0 REGULATORY SAFETY ANALYSIS 5.1 No Significant Hazards Consideration The Commission has provided standards in 10 CFR 50.92(c) for determining whether a significant hazards consideration exists. A proposed amendment to an operating license for a facility involves no significant hazards consideration if operation of the facility in accordance with the proposed amendment would not (1) involve a significant increase in the probability or consequences of an accident previously evaluated; (2) create the possibility of a new or different kind of

Attachment 1 to PLA-5995 Page 20 of 23 accident from any accident previously evaluated; or (3) involve a significant reduction in a margin of safeiy.

PPL proposes changes to Appendix A, Technical Specifications (TS), of Facility Operating License Nos. NPF-14 and NPF-22 for the Susquehanna Steam Electric Station Units 1 and 2 respectively.

The proposed changes restructure TS Section 3.8.4, "DC Sources - Operating,"

Section 3.8.5, "DC Sources - Shutdown," and Section 3.8.6, "Battery Cell Parameters" and relocate a number of Surveillance Requirements (SRs) in TS Section 3.8.4 that perform preventive maintenance on the safety related batteries, to a licensee-controlled program. The specific actions and associated completion times for out-of-limits conditions for battery cell voltage, electrolyte level, and electrolyte temperature are added to TS Section 3.8.6. In addition, specific SRs are being proposed for verification of these parameters.

A new program is being proposed for the maintenance and monitoring of station batteries based on the recommendations of Institute of Electrical and Electronics Engineers (IEEE) Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications." This program is referenced in new TS Section 5.5.13, "Battery Monitoring and Maintenance Program." The items proposed to be relocated will be included in this new licensee controlled program, located in the Technical Requirements Manual (TRM).

In accordance with the criteria set forth in 10 CFR 50.92, PPL has evaluated the proposed TS change and determined it does not represent a significant hazards consideration. The following is provided in support of this conclusion.

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

No. The proposed changes restructure the Technical Specifications (TSs) for the DC Electrical Power Systems. The proposed changes consist of the relocation of several surveillance requirements that perform preventive maintenance on the safety related batteries, to a new license controlled program. The DC electrical power systems, including associated battery chargers, are not initiators to any accident sequence analyzed in the Final Safety Analysis Report (FSAR). Operation in accordance with the proposed TS ensures that the DC electrical power systems are capable of performing functions as described in the FSAR. Therefore, the mitigative functions supported by the DC Power Systems will continue to provide the protection assumed by the analysis.

Attachment I to PLA-5995 Page 21 of 23 The relocation of preventive maintenance surveillance, and certain operating limits and actions to a newly created, licensee-controlled TS 5.5.13, "Battery Monitoring and Maintenance Program," will not challenge the ability of the DC electrical power systems to perform their design functions. The maintenance and monitoring required by current TS, which are based on industry standards, will continue to be performed. In addition, the DC Power Systems are 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 systems. The integrity of fission product barriers, plant configuration, and operating procedures as described in the FSAR will not be affected by the proposed 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 accident previously evaluated?

No. The proposed changes involve restructuring the TS for the DC electrical power systems. These changes will rely on a new license controlled program to monitor battery parameters for operability. The DC electrical power systems, which include the associated battery chargers, are not initiators to any accident sequence analyzed in the FSAR. Rather, the DC electrical power systems are used to supply equipment used to mitigate an accident. These mitigative functions, supported by the DC electrical power systems are not affected by these changes and they will continue to provide the protection assumed by the safety analysis described in the FSAR. There are no new types of failures or new or different kinds of accidents or transients that could be created by these changes. Therefore, the proposed changes do 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 a margin of safety?

No. The margin of safety is established through equipment design, operating parameters, and the setpoints at which automatic actions are initiated. The proposed changes will not adversely affect operation of plant equipment. These changes will not result in a change to the setpoints at which protective actions are initiated. Sufficient DC electrical system capacity is ensured to support operation of mitigation equipment. The changes associated with the new Battery Maintenance and Monitoring Program will ensure that the station batteries are maintained in a highly

ft Attachment 1 to PLA-5995 Page 22 of 23 reliable state. The equipment fed by the DC electrical sources will continue to provide adequate power to safety related loads in accordance with analysis assumptions. Therefore, the proposed changes do not involve a significant reduction in a margin of safety.

5.2 Applicable Regulatorv Requirements/Criteria These proposed changes are consistent with TSTF-360, Revision 1 (Reference 1),

submitted to the NRC by the Technical Specifications Task Force (TSTF).

TSTF-360, Revision 1, was approved by the NRC on December 18, 2000 (Reference 2), and has been incorporated into Revision 2 of NUREG-1433, "Standard Technical Specifications, General Electric Plants, BWR/4," issued by the NRC (Reference 3).

In accordance with GDC 17 requirements for Electric Power Systems, the design of the Class 1E DC electrical power subsystems provides sufficient capacity, capability, independence, redundancy, and testability to ensure the performance of safety functions assuming a single failure.

Further, the proposed changes are consistent with submittals by Clinton (Reference 4), Limerick (Reference 5), Dresden (Reference 6), Diablo Canyon (Reference 7), and Comanche Peak (Reference 8) which have received NRC approval. In addition, the issues identified in the Oyster Creek Request for Additional Information (Reference 9), have also been addressed.

6.0 ENVIRONMENTAL CONSIDERATION

10 CFR 51.22(c)(9) identifies certain licensing and regulatory actions, which are eligible for categorical exclusion from the requirement to perform an environmental assessment. A proposed amendment to an operating license for a facility does not require an environmental assessment if operation of the facility in accordance with the proposed amendment would not (1) involve a significant hazards consideration; (2) result in a significant change in the types or significant increase in the amounts of any effluents that may be released offsite; or (3) result in a significant increase in individual or cumulative occupational radiation exposure. PPL has evaluated the proposed change and has determined that the proposed change meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9). Accordingly, pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment needs to be prepared in connection with issuance of the amendment. This determination, using the above criteria, is:

1. As demonstrated in the No Significant Hazards Consideration Evaluation, the proposed amendment does not involve a significant hazards consideration.

Attachment 1 to PLA-5995 Page 23 of 23

2. There is no significant change in the types or significant increase in the amounts of any effluents that may be released offsite. The proposed change does not involve any physical alteration of the plant (no new or different type of equipment will be installed) or change in methods governing normal plant operation.

7.0 REFERENCES

1. Technical Specifications Task Force (TSTF) Traveler TSTF-360, Revision 1, "DC Electrical Rewrite."

2. Letter from W. D. Beckner (USNRC) to A. R. Pietrangelo, (Nuclear Energy Institute) dated December 18, 2000.

3. NUREG-1433, "Standard Technical Specifications, General Electric Plants, BWR/4," Revision 2, April 30, 2001.

4. Letter from J. B. Hopkins (USNRC) to 0. D. Kingsley, (Exelon Nuclear) dated February 15, 2002.

5. Letter from S. P. Wall (USNRC) to J. L. Skolds, Exelon Nuclear) dated January 29, 2003.

6. Letter from M. Banerjee (USNRC) to C. M. Crane, (Exelon Nuclear) dated June 8, 2004.

7. Letter from J. Donohew (USNRC) to G. M. Rueger, (Pacific Gas and Electric) dated September 20, 2004.

8. Letter from M. C. Thadani (USNRC) to M. R. Blevins, (TXU Energy) dated July 1, 2004.

9. Letter from M. P. Gallagher, (AmerGen Energy Company) to USNRC dated March 31, 2004.

10. Letter from R. V. Guzman (USNRC) to B. T. McKinney (PPL) - RAI on DC Electrical Power Systems TSTF-360 dated October 19, 2005.

. 1',A, Attachment 2 to PLA-5995 Proposed Units 1 & 2 Technical Specification Changes (Revised Markups)

PPL Rev. f DC Sources-Operating 3.8.4 3.8.4 DC Sources-Operating LCO 3.8.4 The DC electrical power subsystems in Table 3.8.4-1 shall be OPERABLE.

APPLICABILITY: MODES 1, 2, and 3.

ACTIONS .

CONDITION REQUIRED ACTION COMPLETION TIME A. ------------NOTE------------ A.1 Restore Unit 1 DC electrical 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Not applicable to DG E power subsystem to DC electrical power. OPERABLE status.

subsystem.

One Unit 1 DC electrical power subsystem inoperable.

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

B.2 Be in MODE 4. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months C. Diesel Generator E DC C.1 Verify that all ESW valves 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power associated with Diesel subsystem inoperable, Generator E are closed.

when not aligned to the Class 1E distribution system.

(continued)

SUSQUEHANNA - UNIT 1 3.8-23 Amendment 178

PPL Rev. ff DC Sources-Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. Diesel Generator E DC D.1 Declare Diesel Generator E 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power inoperable.

subsystem inoperable, when aligned to the Class 1E distribution system.

SURVEILLANCE REQUIREMENTS .... _._._..

SURVEILLANCE FREQUENCY SR 3.8.4.1 Verify battery terminal voltage s when on float charge ar:-

Fhe-7 day

a. !129 Vforthe 125 V battorioe; and a bI if the

b. Ž 258 V for the 250 V baeForioc. Ghen oqualizo chargo or is greater than or equal to the minimum established float haE been en voltage. equalize charge at any time during tho proviou 2hours. 24 7 days ASNI

- 4 days (continued)

SUSQUEHANNA - UNIT 1 TS / 3.8-24 Amendment 118

PPL Rev. 0 I DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR13.8.2 Verify for each battery terminal and connector: 92 days l No visible corroesion.

_ I Battery torminal and connection rosistance is:

a.

50.0E 6 ohms; or

b. 5 100.0E 6 ohms with the caiculatod avorago resi6tanco for the battery 5 50.0E 6 ohms.

SR 4.8.43 Vorify battr;y colis, coGl plates, and rackr show no visual 18 months intdcation of physical damago or abnormn! dotorioratioR that could potentially degrade battery performance.

SIR-&4.4 Romovo visible corrosion and verify battory coll to coil and 48 meRths terminal connctions are coated with anti corrosion matoeial.

SR 3.8.4.5 Verify the battery connection resistance is: 18 moths I

a. 5 100.0E 6 ohms for any single connection; and b.-The calculated average resistance for the batter' i6s 60.0E 6 ohms._

(continued)

SUSQUEHANNA - UNIT 1 TS /3.8-25 Amendment 1/8

PPL Rev. if DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.62 Verify each required battery charger supplies its 24 months associated batteriesy at the following rates for > 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

At greater than or equal to the minimum established float voltages

a. 2100ampsforthe125VBatteryatŽ42127.8V

b. Ž 300 amps for the 250V Battery at-> 255.6V

c. Ž 200 amps for the 125V Diesel Generator E Battery at ' 127.8'.'

SR 3.8.4.73 ------------------------------ NOTES ------------

1. The modified performance discharge test in SR 3.8.4786.6 may be performed in lieu of the service test Wi-SR 3.8.4.7 3onco per 60 months.

2. This Surveillance shall not be Performed in Mode 1,2, or 3. However, credit may be taken for unplanned events that satisfy this SR.

that-satisfy.this R..

Verify battery capacity is adequate to supply, and maintain 24 months in OPERABLE status, the required emergency loads for the design duty cycle when subjected to a battery service test.

(continued)

SUSQUEHANNA - UNIT 1 TS /3.8-26 Amendment 1/8

1' PPL Rev. if DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SRP84.8 ------ --- OT : E--

This Survoillance shall not bo PefrmFed in Mode 1, 2, Verify battery capacity is ! 800%of the manufacturer's 60 Mmth6 rating when subjected to a porformance divcharge test or va modifiod porformance discharge test. AND 12 months whon battery shows degradation or has reached 85% of

< 100%0 of mnanufacturer's AND 24 months when battery' has reachod 85°,% of the expercted ovc lifo with ca pac~ity ff manufact SUSQUEHANNA - UNIT 1 TS / 3.8-27 Amendment 176

-i PPL Rev. f 4z DC Sources-Operating

- 3.8.4 Table 3.8.4-1 (page 1 of 1)

Unit 1 DC Electrical Power Subsystems TYPE VOLTAGE DIVISION I DIVISION II Battery Banks 250 V 1D650 1D660 1D653A (Charger) 1D663 (Charger) or I 1D653B (Charger) 125 V 1D610 (Subsys. A) 1D620 (Subsys. B) 1D613 (Charger A) 1D623 (Charger B) 1D630. (Subsys. C) 1D640 (Subsys. D) 1D633 (Charger C) 1D643 (Charger D)

DG E 125 V 0D595 Battery Banks OD596 (Charger)

SUSQUEHANNA - UNIT 1 TS /3.8-28 Amendment 1,/8

PPL Rev. 0 1

DC Sources-Shutdown 3.8.5 3.8 ELECTRICAL POWER SYSTEMS 3.8.5 DC Sources-Shutdown LCO 3.8.5 DC electrical power subsystems listed in Table 3.8.4.1 shall be OPERABLE as needed to support the DC electrical power distribution subsystem(s) required by LCO 3.8.8, "Distribution Systems - Shutdown."

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

ACTIONS

NoOTE-LCO 3.0.3 is not applicable.

CONDITION REQUIRED ACTION COMPLETION TIME A. -------- NOTE------- A.1 Declare affected required Immediately Not applicable to DG E feature(s) inoperable.

DC electrical power subsystem.

------- OR One or more required A.2.1 Suspend CORE Immediately Unit 1 DC electrical power ALTERATIONS.

subsystems inoperable.

AND (continued)

SUSQUEHANNA - UNIT 1 3.8-29 Amendment 178

PPL Rev. 0 DC Sources-Shutdown 3.8.5 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.2.2 Suspend movement of Immediately irradiated fuel assemblies in the secondary containment.

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

AND A.2.4 Initiate action to restore Immediately required Unit 1 DC electrical power subsystems to OPERABLE status.

B. Diesel Generator E DC B.1 Verify that all ESW valves 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power associated with Diesel subsystem inoperable, Generator E are closed.

while not aligned to the Class 1E distribution system.

C. Diesel Generator E DC C.1 Declare Diesel Generator E 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power inoperable.

subsystem inoperable, while aligned to the Class 1E distribution system.

SUSQUEHANNA -- UNIT 1 3.8-30 Amendment 178

- PPL Rev. f DC Sources-Shutdown 3.8.5 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.5.1 --------------------------------NOTE ----------------

The following SRs must be met, but are not required to be performed: SR 3.8.4.62, and SR 3.8.4.7C3 and SR 3.8.4.8. I For DC sources required to be OPERABLE the following In accordance with SRs are applicable: applicable SRs SR 3.8.4.1 SR 3.8.1.1 SR 3.8.1.7 SR 3.8.4.2 SR 3.8.1.5 SR 3.8.1.8.

SR 3.8.4.3 SR 3.8.4.6 SUSQUEHANNA - UNIT 1 TS /3.8-31 Amendment 1/8

4.

I PPL Rev. p Battery Cel1-Parameters 3.8.6 3.8 ELECTRICAL POWER SYSTEMS 3.8.6 Battery Gel- Parameters I LCO 3.8.6 Battery ee- parameters for the Class 1E 250 V batteries and Class 1E 125 V I batteries shall be within limits.

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

ACTIONS

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

Separate Condition entry is allowed for each battery.

CONDITION REQUIRED ACTION COMPLETION TIME A. Onor more A.1 Vorify pilot coil oloctroloh bic with ono or ol and float voltage' mot moro battory coGl Table 3.8.6 1 Catogory' C paramotors not within limits.

Gateogor A or B limit.

AND A.2 VIorfy baettery e4ll paramotore moot Table 3.8.6-1 Category C AND ORne perF7 days thereafter AND A.3 -Retore battory col 34-days paramotore to Catogory A.

and B limits of Tablo 3.8.6 1.

A. One 125 VDC electrical A.1 Perform SR 3.8.4.1 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Power subsystem and/or one 250 VDC electrical AND cower subsystem with one or more battery cells A.2 Perform SR 3.8.6.1 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months float voltage < 2.07 V.

AND A.3 Restore affected cell voltage 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months 22.07 V.

(continued)

SUSQUEHANNA - UNIT 1 TS / 3.8-32 Amendment 1/8

PPL Rev. q Battery Geg-Parameters I 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. One 125 VDC electrical B.1 Perform SR 3.8.4.1 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Power subsystem and/or one 250 VDC electrical AND power subsystem with float current > 2 amps. B.2 Restore battery float current 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months to S 2 amps, C.- NOTE------- -----------------NOTE-----

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

below the top of plates. ...........................

One 125 VDC electrical C.1 Restore electrolyte level to 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months power subsystem and/or above top of plates.

one 250 VDC electrical power subsystem with AND one or more cells electrolyte level less than minimum established design limits.

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

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

D. One 125 VDC electrical D.1 Restore battery pilot cell 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months power subsystem and/or temperature to greater than one 250 VDC electrical or equal to minimum power subsystem with established design limits pilot cell electrolyte temperature less than minimum established design limits.

(continued)

SUSQUEHANNA - UNIT 1 TS /3.8-33 Amendment 1pt8

PPL Rev. 9' Battery Cell-Parameters I 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME E. Two 125 VDC electrical E.1 Restore battery parameters 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months power subsystems or for batteries in one 125 VDC both 250 VDC electrical electrical power subsystem or power subsystems with one 250 VDC electrical power battery parameters not subsystem to within limits.

within limits.

BE. Required Action and BF.1 Declare associated battery Immediately associated Completion inoperable.

Time of Condition A B C, D. or E not met. I OR One or more batteries with average electrolyte temperature of the Freprosentati'.o cells not within limits.

OR I One or mere

-batteries with one or mere bater; cell par~amete6r Rnt WithiR Catogery C values.

One battery on one 125 VDC electrical power subsystem or one 250 VDC electrical power subsystem with one or more battery cells float voltage < 2.07 V and float current > 2 amps.

SUSQUEHANNA - UNIT 1 TS / 3.8-34 Amendment 1,/8

PPL Rev. 9" Battery Gell-Parameters l 3.8.6 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.6.1 Verify battery cel! paramoeter moot Table 3.8.6 1 Cntnnnr' A limits. The7-day FFeoueRy isenot

----------------- IIL P--__________________------- appliGable if the Not required to be met when battery terminal voltage is battery iseo less than the minimum established float voltage of SR equalize charge or 3.8.4.1. hr ha-R-eAn R equalize charge at Verify each battery float current is 5 2 amps. any time during the previous 4 dayr, 7 days AND I 14 davs I SR 3.8.6.2 Verify each battery pilot cell voltage is 2 2.07 V. 31 days I SR 3.8.6.3 Verify each battery connected cell electrolyte level is 31 days greater than or equal to minimum established design limits.

SR 3.8.6.4 Verify each battery pilot cell temperature is greater than or 31 days equal to minimum established design limits.

SR 3.8.6.5 Verify each battery connected cell voltage is 2.07 V. 92 days I (continued)

SUSQUEHANNA - UNIT 1 TS / 3.8-35 Amendment 1,/8

PPL Rev. 9' Battery GeU-Parameters I

- 3.8.6 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.6.6 ----------- _--------------------- I C------------------------------I- ----

This Surveillance shall not be Performed in Mode 1, 2, or 3. However, credit may be taken for unplanned events that satisfy this SR.

--- ---------- --- ---- --- --- --- ---- --- mm~ m~ M - .

Verify battery capacity is > 80% of the manufacturer's 60 months rating when subjected to a performance discharge test or a modified performance discharge test.

AND 12 months when battery shows degradation or has reached 85% of expected service life with capacity

< 100% of manufacturer's rating AND 24 months when battery has reached 85% of the expected service life with capacity

_100% of manufacturer's rating SUSQUEHANNA - UNIT 1 TS /3.8-36 Amendment 1/l8

- PPL Rev.

Battery Cell-Parameters I 3.8.6

.... *row ._ .. * *rsv

-_ __!..J I SURVEILLA.NCE -RQEC SR 3.8.622 orify,' batteo' coel paramoterM mont Tabl 3.8.6 1 92 days Gategeoy B-limits.

AND Once9 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months aftor battor; dischargo c 110 V for 1425 V DC and 4 -220 fG 250 V DC AND Onco within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months aftor battory ovorchargo > 150 V for 125 V DC and

- 390 V for 250 V DC SR 3.8.6.3 Vorify avorago oloctrolyte temporaturo of ropresontativo 92 days colls is : 60°F for oach Cla~s 1 E battory.

SUSQUEHANNA - UNIT 1 TS / 3.8-37 Amendment 17,

V PPL Rev.9' Battery Ceol-Parameters l 3.8.6 Table 3.8.6 1 (page 1 of 1' Battor: Col Parametwr Reouiromonte I CATEGORY A: CATEGORY C:

LIMITS FOR EACH CATEGORY B: ALLOWIABLE LIMITS DESIGNATED PILOT LIMITS FOR EACH PARAMETER CELL- CONNECTED CELL CONNECTED CELL ElotltLevel Minimumi level imum evol Abov top of platos, indication marik, and indication mark, and and not ovorf lowing 1b inch abovo 14 inch abovo maximum level maximum level indication mark( indication marka loatVltag 4.13 V 2-.13 V 07 V I SpeGiiG-amvi-1-O 1.2 0196 Not more than 0.020 below average of all AND connected colle AveFage ef-al AND connectod celle

> 1.205 A/veFage of all connected cell6 (a) It ic accoptablo-for the eolctrolt1o levol to temporarily increaco abovo the spocifiod maximum level during and immediately following equalizing charger provided it is not eve~lfwo (b) Corrected for eloctroy1to temperature. Level correction is not roequird.

(c) A battery charging current of < 0.25 amp for Class 1E 260 V battoriee and 0.1 amp Class 1E 125 V batteriec when on float charge i6 acceptable for meeting spocific gravity limiter.

SUSQUEHANNA - UNIT 1 TS /3.8-38 Amendment 1/8

PPL Rev. 9t Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.13 BatterN Monitoring and Maintenance Program This program provides for battery restoration and maintenance, based on the recommendations of IEEE Standard 450-1995, IEEE Recommended Practice for Maintenance, Testing and Replacement of Vented Lead-Acid Batteries for Stationary Applications," including the following:

a. Actions to restore battery cells with float voltage < 2.13 V. and

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

(continued)

SUSQUEHANNA - UNIT 1 TS /5.0-1 BA Amendment I

PPL RevA0 DC Sources-Operating 3.8.4 3.8 ELECTRICAL POWER SYSTEMS 3.8.4 DC Sources-Operating LCO 3.8.4 The DC electrical power subsystems in Table 3.8.4-1 shall be OPERABLE.

APPLICABILITY: MODES 1, 2, and 3.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. ------------NOTE------------ A.1 Restore Unit 2 DC electrical 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Not applicable to DG E power subsystem to DC electrical power OPERABLE status.

subsystem.

One Unit 2 DC electrical power subsystem inoperable.

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

B.2 Be in MODE 4. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months C. Diesel Generator E DC C.1 Verify that all ESW valves 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power associated with Diesel subsystem inoperable, Generator E are closed.

when not aligned to the Class 1E distribution system.

(continued)

SUSQUEHANNA - UNIT 2 3.8-26 Amendment 151

PPL Rev. i DC Sources-Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. Diesel Generator E DC D.1 Declare Diesel 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power Generator E inoperable.

subsystem inoperable, when aligned to the Class 1E distribution system.

E. One or more Unit 1 DC E.1 Transfer associated 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power Unit 1 and common subsystem(s) loads to corresponding inoperable. Unit 2 DC electrical power subsystem.

AND E.2 Restore Unit 1 and 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months after Unit 1 DC common loads to electrical power subsystem is corresponding Unit 1 restored to OPERABLE DC electrical power status.

subsystem.

F. Required Actions and F.1 Declare associated Immediately associated Completion common loads Times of Condition E not inoperable.

met.

SUSQUEHANNA - UNIT 2 TS / 3.8-27 Amendment 151

PPL Rev, 0' DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.4.1 Verify battery terminal voltagec when on float _OT -------

GhaFge- ae: Tho 7 day Fruon~Rcy is-Pt applicablo if tho battor' i on

a. > 129 V for tho 125 V battorios; and equalizo chargo or har boon on-oqualizo chargo at any timo durirn tho prrovous -2

b. > 258 V for tho 260 V battorios. hGUF6. '~[VXv ~a is greater than or equal to the minimum established float voltage.

7 days AND I IA4-days I 4

SR 3.8.14.2 Verify for each battory terminal and connoctor: 92-days I hip viricblP corrocion. I hattorV tormInR! ana conRocGUOn rosistanco is: I:

a. < 0OE 6r- ohms- or 1D. -S1U.Ut UonMS Witn Mel GaIculaxoa oawesreno rel MvnrMs]l)

-:-4 - - - r[]^,lHletels:[v 1ffij1 46- t- - - - - -

., .V llidllBlM

. vr 1111) VVvrr

.-- ,vpp (continued)

SUSQUEHANNA - UNIT 2 TS /3.8-28 Amendment 1V,

PPL Rev.f0 DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.3 Vorify battery colls, cell platos, and raclks show 48mnesthr no ialr 1indicatlen of phyocal damage Or abnormal dotorioration that could potontially deograde battory performance.

SR 3.8.4.1 Remove visiblo corrosion and verify battery coGl 4&nths to coil and torminal connections aro coatod with anti corrosion matorial.

SR 3.8.4.5 Verify the battory connection resistance iE: 48 months

a.

100.OE-6 ohmns forany singloRonectionI.

b. Tho calculatod avorago rosistanco for tho battery is -:5.OE 6 ohms.

SR 3.8.4.62 Verify each required battery charger supplies its 24 months associated batteriesy at the following rates for 2 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . at greater than or equal to the minimum established float voltages:

a) 2100 amps for the t25V Battery at- 427.8V b) 2 300 amps for the 250V Battery at- 255.6V c) 2200 amps for thel25V Diesel Generator E Battery at 27-.8V (continued)

SUSQUEHANNA - UNIT 2 TS /3.8-29 Amendment I VI

PPL Rev. 0K DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY 1"

SR 3.8.4.73 -------------------------- NOTES-------------------------- I

1. The modified performance discharge test in SR 3.8.438 6.6 may be performed in lieu of the 69rVico test in SR 3.8.4.7a-Gneeilaw 60 moRnhs.

2. This Surveillance shall not be Performed in MODE 1, 2 or 3. However, credit may be taken for unplanned events that satisfy this SR.

Verify battery capacity is adequate to supply, and 24 months maintain in OPERABLE status, the required emergency loads for the design duty cycle when subjected to a battery service test.

(continued)

SUSQUEHANNA - UNIT 2 T S / 3.8-30 Amendment 1V1

PPL Rev. ff DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY 4

c^M fl A fO A mf>ir-am J.U.4.U HwU M This SuM'OD llane Shall not bo P;rformed in M.ODE 1,2, eer3.

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

AND 12 months when battey chews degradation or has reached 85% of expcted serice life with Gapac!t' 100% of manufacturer's AND I 241 months when battery has t,-hoj QOr/ -S &ho expected 6erwice life with capacity Ž100% of manufacturer's rating (continued)

SUSQUEHANNA - UNIT 2 TS /3.8-31 Amendment lVl

PPL Rev. id DC Sources-Operating.

3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.4.0 4 I------------_-----------Irt t------ ------------------ I When Unit 1 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 1 SR 3.8.5.1 is applicable.

For required Unit 1 DC electrical power In accordance with subsystems, the SRs for Unit 1 Specification applicable SRs 3.8.4 are applicable.

SUSQUEHANNA - UNIT 2 TS / 3.8-32 Amendment 174

I PPL Rev. if DC Sources-Operating 3.8.4 Table 3.8.4-1 (page 1 of 1)

Unit 2 DC Electrical Power Subsystems TYPE VOLTAGE DIVISION I DIVISION II Battery Banks 250 V 2D650 2D660 2D653A (Charger) 2D663 (Charger) or I 2D653B (Charger) 125 V 1D610 (Subsys. A) 1D620 (Subsys. B)

I D613 (Charger A) 1D623 (Charger B) 2D610 (Subsys. A) 2D620 (Subsys. B) 2D613 (Charger A) 2D623 (Charger B) 1D630 (Subsys. C) 1D640 (Subsys. D) 1D633 (Charger C) 1D643 (Charger D) 2D630 (Subsys. C) 2D640 (Subsys. D) 2D633 (Charger C) 2D643 (Charger D)

DGE 125 V OD595 Battery Banks OD596 (Charger)

SUSQUEHANNA - UNIT 2 TS / 3.8-33 Amendment 1V1

PPL Rev.l6 DC Sources-Shutdown 3.8.5 3.8 ELECTRICAL POWER SYSTEMS 3.8.5 DC Sources-Shutdown LCO 3.8.5 DC electrical power subsystems listed in Table 3.8.4.1 shall be OPERABLE as needed to support the DC electrical power distribution subsystem(s) required by LCO 3.8.8, "Distribution Systems - Shutdown."

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

ACTIONS t- - ______________

LCO 3.0.3 is not applicable.

CONDITION REQUIRED ACTION COMPLETION TIME A. --------NOTE ----- A.1 Declare affected required Immediately Not applicable to DG E DC feature(s) inoperable.

electrical power subsystem.

OR One or more required Unit 2 A.2.1 Suspend CORE Immediately DC electrical power ALTERATIONS subsystems inoperable.

AND (continued)

SUSQUEHANNA - UNIT 2 3.8-34 Amendment 151

PPL Rev.6 DC Sources-Shutdown 3.8.5 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.2.2 Suspend movement of Immediately irradiated fuel assemblies in the secondary containment.

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

AND A.2.4 Initiate action to restore Immediately required Unit 2 DC electrical power subsystems to OPERABLE status.

B. Diesel Generator E DC B.1 Verify that all ESW valves 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power. associated with Diesel subsystem inoperable, Generator E are closed.

while not aligned to the Class I E distribution system.

C. Diesel Generator E DC C.1 Declare Diesel Generator E 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months electrical power - inoperable.

subsystem inoperable, while aligned to the Class 1E distribution system.

(continued)

SUSQUEHANNA - UNIT 2 3.8-35 Amendment 151

PPL Rev..6 DC Sources-Shutdown 3.8.5 ACTIONS (continued) .

CONDITION REQUIRED ACTION COMPLETION TIME D. -------- NOTE-------- D.1 Declare affected required Immediately Not applicable to DG E DC feature(s) inoperable electrical power subsystem.

One or more inoperable OR required Unit 1 DC electrical power subsystem.

D.2.1 Suspend CORE Immediately ALTERATIONS.

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

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

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

OR (continued)

SUSQUEHANNA - UNIT 2 3.8-36 Amendment 151

I PPL Rev.4f DC Sources-Shutdown 3.8.5 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME D. (continued) D.3.1 Initiate action to transfer Immediately Unit 1 and common loads to corresponding Unit 2 DC.

electrical power subsystem.

AND D.3.2.1 Restore Unit 1 and common 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months after Unit 1 loads to corresponding DC electrical power Unit 1 DC electrical power subsystem is restored subsystems. to OPERABLE status.

OR D.3.2.2 Declare associated Unit 1 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months after Unit 1 and common loads DC electrical power inoperable., subsystem is restored to OPERABLE status.

SUSQUEHANNA - UNIT 2 3.8-37 Amendment 151

PPL Rev.d DC Sources-Shutdown 3.8.5 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.5.1 ---- IMIL

t --- ___

The following SRs must be met, but are not required to be performed: SR 3.8.4._-,_ and SR 3.8.4.7L3, and SR 3.8.1.8.

I For DC sources required to be OPERABLE the In accordance with applicable following SRs are applicable: SRs-SR 3.8.4.1 SR 3.8.4.4 I SR 3.8.4.2 SR 3.8.4.5 I SR 3.8.4.3 SR 3.8.4.6 I 4-

-KtIAT SR 3.8.5.2 --------- --- ----- GNU I t -_-_________

When Unit 1 is in MODE 4 or 5, or moving irradiated fuel assemblies in the secondary containment, the Note to Unit 1 SR 3.8.5.1 is applicable.

For required Unit 1 DC electrical power In accordance with applicable subsystems, the SRs for Unit 1 Specification 3.8.4 SRs are applicable.

SUSQUEHANNA - UNIT 2 TS /3.8-38 Amendment 1p/

- PPL Rev. 9 Battery Cell-Parameters l 3.8.6 3.8 ELECTRICAL POWER SYSTEMS 3.8.6 Battery Cell- Parameters I LCO 3.8.6 Battery Geel- parameters for the Class 1E 250 V batteries and Class 1E 125 V I batteries shall be within limits.

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

ACTIONS lvt--------------------- I-------------------------------------------------------------

Separate Condition entry is allowed for each battery.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more batterios with A.1 Vorify pilot coll eloctrolye level 4h Rono r oro battoer cll aflot vltage moot paraReters not WithiR Table 3.8.6 1 Categoey C Catogory A or B limits. lirmite AND A.2 Verify battery cell parameters 24 heWsF meet Table 3.8.6 1 Catogory C limits. AND GCeepeFe 7-day&

thereafter AND A.3 Rostore battery cll 31 days parameteor to Category A and B limits of Table 3.8.6 1.

(continued)

SUSQUEHANNA - UNIT 2 TS /3.8-39 Amendment 1 V,

PPL Rev. 9' Battery Cell-Parameters I 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME A. One 125 VDC electrical A.1 Perform SR 3.8.4.1 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months power subsystem and/or one 250 VDC electrical power AND subsystem with one or more battery cells float voltage A.2 Perform SR 3.8.6.1 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months

<2.07 V.

AND A.3 Restore affected cell voltage 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months

Ž2.07 V.

B. One 125 VDC electrical B.1 Perform SR 3.8.4.1 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Power subsystem and/or one 250 VDC electrical power AND subsystem with float current

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

< 2 amps C. ----- NOTE-------- --------------------NOTE--------------

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

One 125 VDC electrical C.1 Restore electrolyte level to 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months Power subsystem and/or one above top of plates.

250 VDC electrical power subsystem with one or more AND cells electrolyte level less than minimum established design limits.

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

AND (continued)

SUSQUEHANNA - UNIT 2 TS / 3.8-40 Amendment .1V,

PPL Rev. V Battery GeW-Parameters I 3.8.6 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME C.3 Restore electrolyte level to 31 days greater than or equal to minimum established design limits.

D. One 125 VDC electrical DA Restore battery pilot cell 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months Power subsystem and/or temperature to greater one 250 VDC electrical than or equal to minimum Power subsystem with pi established design limits.

cell electrolyte temperature less than minimum established design limits.

E. Two 125 VDC electrical E.1 Restore battery 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months power subsystems or both parameters for batteries in 250 VDC electrical power one 125 VDC electrical subsystems with battery Power subsystem or one parameters not within limits. 250 VDC electrical Power subsystem to within limits.

8f. Required Action and BF.1 Declare associated battery Immediately associated Completion inoperable.

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

OR Ono or moro batterios with averago oloctrolyto tomporaturo of theo rMpreseRtative Gells Rot within liis

-OR-l One or moro batteries with one or more battery cGel parameters not within Category C values.

SUSQUEHANNA - UNIT 2 TS /3.8-41 Amendment 1V,

PPL Rev. 9' Battery Gell-Parameters l 3.8.6 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME F. (continued)

One battery on one 125 VDC electrical power subsystem or on one 250 VDC electrical power subsystem with one or more battery cells float voltage <

2.07 V and float current > 2 amps.

SURVEILLANCE FREQUENCY SR 3.8.6.1 Vorify battory cell Farameters moet Table 3.8.6.1 NOTE GategFy A limRit-. The 7 day Frequency i9 not applicable if the batterI' i on

-NOT E------------- egualize-oharan or hae hben Not required to be met when battery terminal on equalize charge at any voltage is less than the minimum established time during the previous 4 float voltage of SR 3.8.4.1. dlalza Verify each battery float current is *2 amps.

7 days AND 14 days SR 3.8.6.2 Verify each battery pilot cell voltage is 2 2.07 V. 31 days SR 3.8.6.3 Verify each battery connected cell electrolyte 31 days level is greater than or equal to minimum established design limits.

SUSQUEHANNA - UNIT 2 TS / 3.8-42 Amendment 1V,

I . . , ,; 'l, , i I

PPL Rev. 9' Battery GeIl-Parameters I 3.8.6 SURVEILLANCE REQUIREMENTS (continued) l SURVEILLANCE FREQUENCY SR 3.8.6.4 Verify each battery pilot cell temperature is 31 days greater than or equal to minimum established design limits.

SR 3.8.6.5 Verify each battery connected cell voltage is 92 days

Ž2.07V.

SR 3.8.6.6 ------------------------- NOTE------------------------------

This Surveillance shall not be Performed in Mode 1. 2. or 3. However, credit may be taken for unplanned events that satisfy this SR.

Verify battery capacity is 2 80% of the 60 months manufacturer's rating when subiected to a performance discharge test or a modified performance discharge test. AND 12 months when battery shows degradation or has reached 85% of expected service life with capacity

< 100% of manufacturer's rating AND 24 months when battery has reached 85% of the expected service life with capacity 2 100% of manufacturer's rating SUSQUEHANNA - UNIT 2 TS /3.8-43 Amendment 1V,

PPL Rev. 9'

'A-Battery G94-Parameters I 3.8.6 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.8.6.2 Vorify battory coil paramotors moot Tablo 3.8.6 1 92 days GatoegeW B limits.

AND Onco within 21 hourc aftor battor' Gisohargo < 110 V for 125 V DC and <22n0 V for 260 V DC Onco within 24 hourm aftor battory ovochargo > 150 V for 126 V DCand> 300'V for 260 V DC-SR 3.8.6.3 Vorify avoragooloctrolyt tomporaturoofOdays roprosontativo oells is ' 60°F for oach Class 1E batteory SUSQUEHANNA - UNIT 2 TS / 3.8-44 Amendment l VI

PPL Rev. p' Battery Ca Parameters I 3.8.6 l l A A J 1 nhln 981-il

. -_ -I-,- ,

ffl3CIfl1

%r--..7- I 0? 1 1

- I Is ottJldry ^-II=Fdff rlt~u ri;;.Ati.- rannonto rntoquwdi.i. . I CATEGORY A: CATEGORY C:

LIMITS FOR EACH CATEGORY B: ALLOWABLE DESIGNATED LIMITS FOR EACH LIMITS FOR EACH PARAMETER PILOT CGEL CONNECTED CELL CONNECTED CELL Efoctrelyte Level Žt MinIMUM lovol Minimum lovol Abovo top of plateo, indication marlk, and indication mark, and and not ovorflowing

' 14 inch abovo ' 14 inch abovo mimmlovel maximum lovol indication mar id at Fleat Voltag a V>.

peiiG 1.200 Ž4 . 95 Not moro than 0.0R0 bolow aVorago of all connoctod coMl6 AND AND Aveoage of all connocted cells

> 1.205 Average el-aU connectod colls (a) It is accoptable for tho eloctrolyto level to tomporarily incroaso abovo tho 6pocifiod maximum lovol during and immodiately following equalizing chargoc provided it ie not (b) Corroctod for electrolyte tomperature. Lovol corroction is not requirod.

(c) A battory charging curront of < 0.25 amp for Class 1E 250 V battorios and 0.1 amp Glase 1C 125 V battorio when on fleat chargo is aoGoptablo for meeting cpocific gravit' SUSQUEHANNA - UNIT 2 TS /3.8-45 Amendment iv,

PPL Rev. 9' Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.13 Battery Monitoring and Maintenance Program This program provides for battery restoration and maintenance, based on the recommendations of IEEE Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing and Replacement of Vented Lead-Acid Batteries for Stationary Applications," including the following:

a. Actions to restore batterv cells with float voltaae <2.13 V. and

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

(continued)

SUSQUEHANNA - UNIT 2 TS / 5.0-1 8A Amendment I

Attachment 3 to PLA-5995 Proposed Units 1 & 2 Technical Specification Bases Changes (Revised Markups for Information Only)

i PPL Rev. 1 DC Sources-Operating B 3.8.4 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.4 DC Sources-Operating BASES BACKGROUND The 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. 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 Unit 1 DC power sources provide both motive and control power to selected safety related equipment, as well as circuit breaker control power for the nonsafety related 13.8 kV, 4.16 kV, and 480 V and lower AC distribution systems. Each DC subsystem is energized by one 125/250 V battery and at least 1 Class 1E battery charger. The 250 V DC batteries for division I are supported by two baff-u-l capacity chargers; the 250 V DC batteries for division 11are supported by a full capacity charger; and, the 125 V DC batteries are each supported by a single full capacity charger. Each battery is exclusively associated with a single 125/250 VDC bus and cannot be interconnected with any other 125/250 VDC subsystem. The chargers are supplied from the same AC load groups for which the associated DC subsystem supplies the control power. Transfer switches provide the capability to power Unit 1 and common DC loads from Unit 2 DC sources.

Diesel Generator (DG) E DC power sources provide control and instrumentation power for DG E.

During normal operation, the DC loads are 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 loads are automatically powered from the station batteries.

The DC power distribution system is described in more detail in Bases for LCO 3.8.7, "Distribution System-Operating," and LCO 3.8.8, "Distribution System-Shutdown."

(continued)

SUSQUEHANNA - UNIT 1 TS / B3.8-54 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES BACKGROUND Each battery has adequate storage capacity to carry the required load (continued) continuously for approximately 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . to meet the duty cycle discussed in the FSAR. Chapter 8 (Ref. 12). The battery is designed with additional capacity above that required by the design duty cycle to allow for temperature variations and other factors.

Each subsystem, including the battery bank, chargers and DC switchgear, is located in an area separated physically and electrically from the other subsystems 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, or battery chargers.

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

Theminimumdesignvoltagelimitis105/210V.atthebatteryterminals.l The battery cells are of flooded lead acid construction with a nominal specific qravity of 1.215. This specific gravity corresponds to an open circuit voltage of approximately 124 V for a 60 cell battery (i.e. cell voltage of 2.06 volts per cell (VPc)). The open circuit voltage is the voltage maintained when there is no charging or dischar ing. Once fully charged with its open circuit voltage Ž 2.06 VPc. the battery cell will maintain its capacity for 30 days without further charging per manufacturer's instructions. Optimal long term performance however, is obtained by maintaining a float voltage of 2.20 to 2.25 VPc. This provides adequate over-potential, which limits the formation of lead sulfate and self discharge. The nominal float voltage of 2.2 Vpc corresponds to a total float voltage output of 132 V for a 60 cell battery as discussed in the FSAR, Chapter 8 (Ref. 12).

Each battery charger of DC electrical power subsystem has ample power output capacity for the steady state operation of connected loads required during normal operation, while at the same time maintaining its battery bank fully charged. Each battery charger has sufficient exees l capacity to restore the battery from the design minimum charge to its fully charged state within design basis requirements while supplying normal steady state loads (Ref. 4312).

(continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-55 Revision 2

PPL Rev. 1

DC Sources-Operating B 3.8.4 BASES BACKGROUND The battery charger is normally in the float-charge mode. Float-charge is (continued) 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 batterv are overcome and the batterv 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 batterv char'er 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 batterv charger (if the discharge was significant. e.g., following a battery service test) until the battery terminal voltage approaches the charger voltage setpoint. Charging current then reduces exponentially during the remainder of the recharge cycle. Lead-calcium batteries have recharge efficiencies of greater than 95%, so once at least 105% of the ampere-hours discharged have been returned, the battery capacity would be restored to the same condition as it was prior to the discharge. This can be monitored bv direct observation of the exponentially decaying charging current or by evaluating the amp-hours discharged from the battery and amp-hours returned to the battery.

APPLICABLE The initial conditions of Design Basis Accident (DBA) and transient SAFETY ANALYSES analyses in the FSAR, Chapter 6 (Ref. 4) and Chapter 15 (Ref. 5),

assume that Engineered Safety Feature (ESF) systems are OPERABLE.

The DC electrical power system provides normal and emergency DC electrical power for the DGs, emergency auxiliaries, and control and switching during all MODES of operation. The OPERABILITY of the DC subsystems is consistent with the initial assumptions of the accident analyses and is based upon meeting the design basis of the unit. This includes maintaining DC sources OPERABLE during accident conditions in the event of:

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

b. A worst case single failure.

The DC sources satisfy Criterion 3 of the NRC Policy Statement (Ref. 6).

(continued)

SUSQUEHANNA - UNIT 1 TS / B3.8-56 Revision 2

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

LCO The DC electrical power subsystems 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 DC electrical power subsystem does not prevent the minimum safety function from being performed (Ref. 312).

The DC electrical power subsystems include:

a) each Unit 1 DC electrical power subsystem identified in Table 3.8.4:1 including a 125 volt or 250 volt DC battery bank in parallel with a battery charger and the corresponding control equipment and interconnecting cabling supplying power to the associated bus; and, b) the DieseI Generator E DC electrical power subsystem identified in Table 3.8.4-1 including a 125 volt DC battery bank in parallel with a battery charger and the corresponding control equipment and interconnecting cabling supplying power to the associated bus.

APPLICABILITY The DC electrical power sources are required to be OPERABLE in MODES 1, 2, and 3 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 4 and 5 are addressed in the Bases for LCO 3.8.5, "DC Sources-Shutdown."

(continued)

SUSQUEHANNA - UNIT 1 .TS / B 3.8-57 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES ACTIONS A.1 Condition A represents one subsystem with a loss of ability to completely respond to an event, and a potential loss of ability to remain energized during normal operation. It is therefore imperative that the operator's attention focus on stabilizing the unit, minimizing the potential for complete loss of DC power to the affected division. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for an inoperable DC Distribution System division.

If one of the required DC electrical power subsystems is inoperable (e.g.,

inoperable battery, inoperable battery charger(s), or inoperable battery charger and associated inoperable battery), the remaining DC electrical power subsystems have the capacity to support a safe shutdown and to mitigate an accident condition. Since a subsequent worst case single failure could, however, result in the loss of minimum necessary DC electrical subsystems to mitigate a worst case accident, continued power operation should not exceed 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Completion Time is based on Regulatory Guide 1.93 (Ref. 7) 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.

Condition A is modified by a Note that states that Condition A is not applicable to the DG E DC electrical power subsystem. Condition C or D is applicable to an inoperable DG E DC electrical power subsystem.

B.1 and B.2 If the inoperable Unit I DC electrical power subsystem cannot be restored to OPERABLE status within the required Completion Time, the unit must be brought to a MODE in which the LCO does not apply. To achieve this status, the unit must be brought to at least MODE 3 within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and to MODE 4 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . The allowed Completion Times are reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems. The Completion Time to bring the unit to MODE 4 is consistent with the time required in Regulatory Guide 1.93 (Ref. 7).

(continued)

SUSQUEHANNA- UNIT 1 TS / B3.8-58 Revision 2

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

If Diesel Generator E is not aligned to the class 1E distribution system, the only supported safety function is for the ESW system. Therefore, under this condition, if Diesel Generator E DC power subsystem is not OPERABLE actions are taken to either restore the battery to OPERABLE status or shutdown Diesel Generator E and close the associated ESW valves in order to ensure the OPERABILITY of the ESW system. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for other inoperable DC sources and provides sufficient time to evaluate the condition of the battery and take the corrective actions.

D.1 If the Diesel Generator is aligned to the class 1E distribution system, the loss of Diesel Generator E DC power subsystem will result in the loss of a on-site Class 1E power source. Therefore, under this condition, if Diesel Generator E DC power subsystem is not OPERABLE actions are taken to either restore the battery to OPERABLE status or declare Diesel Generator E inoperable and take Actions of LCO 3.8.1. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for other DC sources and provides sufficient time to evaluate the condition of the battery and take the necessary corrective actions.

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. Gharging ysteom and tho ability ef tho battorio to porfore thoir eintonded funRtior.

Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery (oF battery Goll)-and maintain the battery (or a-battery-Goll) in a fully charged state while supplying the continuous steady state loads of the associated DC subsystem. On float charge, battery cells will receive adequate current to optimally charge the battery. The voltage requirements are based on the nominal design voltage of the battery and are consistent with the minimum float voltage established by the battery manufacturer (2.20 Vpc or 132 V at the battery terminals). This voltage maintains the battery plates in a condition that supports maintaining the arid life (expected to be approximately 20 years).

(continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-59 Revision 2

PPL Rev. I DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.1 (continued)

REQUIREMENTS Tho voltago requiromonts aro consistent with tho initial voltagos asrumod in tho batteFry sizing calculationS. T:he-This SR must be performed every 7 days consistent with manufacturer recommendations and IEEE-450 (Ref. 8). Howevor, this Frequency is modifiod by a Note that allows tho Frequency to be extended for up to 14 days when the battery it on equalize charge or has been on equalize charge any time during the previous 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months . This change recognizes the routine 7 day Frequency must be extended until 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months after an equalize charge ie completed so that meaningful results are obtained for thie SR. The 14 day Frequency i£ net modified by the Note, therefore, the SR must be performed overy 11 days regardless of how often the battery is placed on equalize charge.

SR-3.8.1.

-Visual inspection to detect corrosion of the batter;y ells and cennectione; or, measurement of the rosi6tanceo0f each inter cell, inter rack, inter tier, andeto~inr crvi ion rwith visiblet corrosion, prorvidel ar indioation that there iEno physical damage. or abnormal deterioration tht d potentially degrade battery performance.

The connection resistance limits established for this SR provide two acceptance limits for any connection where there is visible signeof corrosion. The first limit, if met, requires no additional actions and ensures the design capability of the battery is maintained. If the second limit is used, the calculated average resistance for the associated battery determined is SR 3.8.4.5 shall be recalculated using the new resistance value. Resistance values shall be measured for only those c6nwoctions where there i6ViSibf9 signs of corrosion. To determine the average connection resistance, data from the performance of SR 3.8.4.6 can be used for unaffected connections.

The Frequency for these insectiens, which can detect conditions that can cause power losses duo to resistance heating, is 92 days. This Fr=equencry is onrsidered acceptable basedon operating experience related to detecting corrosion trends.

(continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-60 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE I REQUIREMENTS Visual inpeption of tho battor'y ceiI, coGl platoe, and battory raclk prF'doe an indication of phycical damage Or bnorma! deterioatio;n that Gould petet;ially deq-ade bat+e^y perfeFnaRm~e The p FerseRG9 f physi;a-damage or dotorioration doee not roprosont a failuro of this SR, providod an evaluation dotorminos that tho physical damago or dotorioration doeo not a^efet tho OPERABILITY of the batto' (its ability to porform itS d^esig f uR^+;eR.

Tho Froquenc'y of thir SR is accoptablo bocauso ethor adminictrativo controlc oncror adequate batto; ponrformanco during tho 18 mnth

-intor'l. Fu rthormro, operating exprinco has hon(. hoso compononts usually pass the Survoillanco whon porformod at the 18 month Froguency; thorofore, tho Froeuoncy is accoptablo from a roliability standpint.

S8R .8.4.4 and SR 3.8.46 I Visual inspoction and roeictanco moasurmmonts of intor coil, intor rack, inter tior, and torminal connections providos an indication of physical damago or abnormal dotorioration that could indicato dogradod battory condition. Th anti-corroionRmatorial is used to holp onruro good oloctrical connections and to roduco terminal dotorioration. Tho .isual inspoction for corrosion i6 not intondod to roquiro removal of and inspoctiGn und-er oah torminal c nncntien.

Tho romoeal of visiblo corrosion is a provontivo maintonanco SR9 Tho prosonco of Aisiblo corrosion doos not nocesarily roprosont a failuro of this SR, providod visibleo crroFion is removed during porformanco of this Suroillanco. Tho connoction resistance limitc for this SR mI the limite specified in the SPR The calculate aYerage resistance limit nu tht he total voltage drop across the battery conneoctionss iconistent to those aesumed in the battery calculations, while the upper limit for battery resistaRne preAents the poscibilit; of batter' damage duo to overheating of the connections.

(continued)

SUSQUEHANNA - UNIT 1 TS / B38-61 Revision 2

I PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.1.4 and SR 3.8.4.5 (continued) I REQUIREMENTS The Froquency of this SR is acceptable because other administrative controloncsurse adoquato battoer' pbrfornmanoduring the 18 meonth intoerl. F=urthernore, operating experience hal chown; theso componente usually pass the Surveillanco when performed at the 18 MOMtf 1-reGluecY: Ifleretor. Me i-requenc is aGceptable trom -a SR 3.8.4.62 I Batery chargor capability roquiremente are based on This SR verifies the design capacity of the batery charg e-. According to Regulatory Guide 1.32 (Ref. 9), the battery charger supply is .reired recommended 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 requires that each battery charger be capable of supplying DC current to its associated battery bank at the minimum established float voltage for greater than or equal to 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . The ampere requirements are based on the output rating of the chargers. The voltage requirements are based on the charger voltage level after a response to a loss of AC power. The time period is sufficient for the charger temperature to have stabilized and to have been maintained for at least 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

(continued)

SUSQUEHANNA - UNIT 1 TS / B3.8-62 Revision 2

Is

. PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.6-2 (continued) .1I REQUIREMENTS The Frequency is acceptable, given. the unit conditions required to perform the test and the other administrative controls existing to ensure adequate charger performance during these 24 month intervals. In addition, this Frequency is intended to be consistent with expected fuel cycle lengths.

SR 3.8.4.73 I A battery service test is a special test of the battery's capability, as found, to satisfy the design requirements (battery duty cycle) of the DC electrical power system. The test can be conducted using actual or simulated loads. The discharge rate and test length corresponds to the design duty cycle requirements as specified in Reference 12.

The Frequency of 24 months is consistent with the recommendations of Regulatory Guide 1.32 (Ref. 9) and Regulatory Guide 1.129 (Ref. 10),

which state that the battery service test should be performed during refueling operations or at some other outage, with intervals between tests not to exceed 24 months.

This SR is modified by a-two Notes. Note 1 WhiGh-allows only the performance of a modified performance discharge test SR 3.8.6.6 in lieu of a service test SR 3.8.4.3Aono per 60 months.

A modified performance discharge test is a test of the battery capacity and its ability to provide a high rate, short duration load (usually the highest rate of the du' ceG.19). This will o the hbattors Mnfirm ability to mnot tho critcal pod of lead dut cyle ihR in addition to deterrmning its percentage of rated capacity. Initial conditins for the modified performance discharge test should be identical to those specified for a The modified performance discharge test is a test of simulated duty cycle consisting of two different discharge rat s. The first discharge rate consists of the one minute published rate for the battery or the largest cr rent loadeof the d' cycle followed by a seond dihrge rte which I employs the test rate for the perform-ance discharge tst. These discharge rtes envelope the duty cycle of the eor.'ic test. Since the ampere hours removed by a published one minute discharge rate represent a :er'y small portion of the battery capacity, the test rate can be changed to that for the peror{mance discharge test withoute9oFmromising.

(continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-63 Revision 3

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.7-3 (continued)

REQUIREMENTS tho rosults of the porformanco dischargo tost. The battor; terminal voltage for tho modified performanco discharge test should romain above the minimum battery terminal voltage specified in tho soreico test. When the battery leads aftor tho first minute excoods the porformanco tost di6charge rate, tho modified performanco dischargo te6t is performed by first conducting the sericoe test, than adjusting the dischargo rate to tho constant curront valueFnally used for the porformance discharge test.

Thi6 test is terminated when the specified minimum battery terminal voltage is reached.

When the battery loads after the first minute exceeds the performancel discharge test rate, the battery capacity is calculated as follows:l eof rated capacity at 26°C (77 0 F) -

KFLRatedZAmpere Hours]'s10 Xt xlO Whoro:

K = Temperature Correction Factor from IEEE 450 1995 i ischarge Current in amps for n th section T Duration of n th section discharge in hour n Section number for each portion of the discharge, including both service test and performance test portions Thic % of rated capacity equation uses the temperature corrected Ampere Hours instead of the temperature corrected discharge rates as specified in IEEE 460 1095. It is not possible to temperature correct the discharge rate without impacting the sorAice test.

The SR is modified by a Note. The reason for thE- Note 2 is that performing the Surveillance would remove a required DC electrical power subsystem from service, perturb the Electrical Distribution System, and challenge safety systems. Credit may be taken for unplanned events that satisfy the Surveillance. Examples of unplanned events may include:

(continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-64 Revision 3

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE REQUIREMENTS SR 3.8.4.3 (continued) 1.) Unexpected operational events which cause the equipment to perform the function specified by this Surveillance, for which adequate documentation is available: and 2.) Post maintenance testina that requires performance of this Surveillance in order to restore the component to OPERABLE, provided the maintenance was required, or performed in coniunction with maintenance required to maintain OPERABILITY or reliability.

I A ba.*ory porformanco di6charge toet is a teot of constant curront craparity' of a bah-*,y,normally dono iR tho a- found aondition, aftor ha-ng bh^^n in ro.r'io, to dotoct aRy chango in the Gapacity' doo od by the accoptanco tost.

Tho toet is intoRded to dotornoiRovorall battory dogradation duo to ago a~d usage.

A bateor modifiod peorfworance dirnchargo toet is doribod4 in tho i:2 for SR 3.8.4.7. EQthor tho battoe, peorformanco diechagro tost or tho modifiod porformanco-diechargo tost is acceptable for satisfying SR 3.8.4.8; howovor, only tho modifiod porformance dischargo tost may bo used to ratify SR 3.8.4.8 whilo etirfing tho roguiromonte Rf SR 3.8.4.7 at the eamo timo.

Tho accoptanco critoria for this Survoillance it cnenitont with IEEE 140 (Rof. 8) and IEEE 485 (Rof. 11). Thoso roforoncoe roceommend that tho battory bo roplacod if its capacity ie bolow 80% of the manufacturer's rating. A caPa6ir'oyf 805% chowe that tho bahtore' rato of detorioretion i i incroping, ovonr if thore ir ample rapacity to meot the load rouiromeRnts.

The Froquoncy for thiG tost is normally 60 months. If tho baeory' shows Adoreadaien or if tho battor, ha- roachod 85% of ito eoxpectd 6er.ic lifo ard Gapaci isit < 1 00% of tho maRnufatureoro rating, tho SurwoillanRo Froquency is roducod to 14 months. Howovor, if tho battory shows no degradation but hat roachod 85% of its oxpoctod soreico life, the Survoillanco Froquency is only roducod to 24 months for battorioes that rotain capacity ' 100% of tho manufacturer's rating. Degradation is (continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-65 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.8 (ntinuod) l REQUIREMENTS

-Rdicated, aoerrding to I=EE-150 (Ref. 8), WheR the bahore' rapait drops by more than 10% relative to its Gapacity on the preVious porforRanco teRt or when it is 100% below the manufacturoGs rating. All those Frequencies are consistent with the rocommondations in IEEE 450 (Ref. 8).Tho SR is modified by a Note. The roason for the Note is that peormFirngR the Suilvlac iw ould reorF e roirod C eletral powe subsystem from sewrico, porturb the Electrical Distribution Systom, and challenge safety systems.

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

2. Regulatory Guide 1.6.

3. IEEE Standard 308.

4. FSAR, Chapter 6.

5. FSAR, Chapter 15.

6. Final Policy Statement on Technical Specifications Improvements, July 22, 1993 (58 FR 39132).

7. Regulatory Guide 1.93.

8. IEEE Standard 450.

9. Regulatory Guide 1.32, February 1977.

10. Regulatory Guide 1.129, April 1977, February 1978.

11. IEEE Standard 4859. -:-l

12. FSAR, Chapter 8, Section 8.3.2.1.1.6 SUSQUEHANNA - UNIT 1 TS / B3.8-66 Revision 3

PPL Rev. 1 DC Sources-Shutdown B 3.8.5 B3.8 ELECTRICAL POWER SYSTEMS

B3.8.5 DC Sources-Shutdown BASES BACKGROUND A description of the DC sources is provided in the Bases for LCO 3.8.4, "DC Sources-Operating."

APPLICABLE The initial conditions of Design Basis Accident and transient analyses in SAFETY ANALYSES the FSAR, Chapter 6 (Ref. 1) and Chapter 15 (Ref. 2), assume that Engineered Safety Feature systems are OPERABLE. The DC electrical power system provides normal and emergency DC electrical power for the diesel generators (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 the requirements for the supported systems' OPERABILITY.

The OPERABILITY of the minimum DC electrical power sources during MODES 4 and 5 and during movement of irradiated fuel assemblies ensures that:

a. The facility 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 an inadvertent draindown of the vessel or a fuel handling accident.

LCO 3.8.5 is normally satisfied by maintaining the OPERABILITY of all Division I or all Division II DC sources listed in Table 3.8.4-1 and the Diesel Generator E battery bank. However, any combination of DC sources that maintain OPERABILITY of equipment required by Technical Specifications may be used to satisfy this LCO. The DC sources satisfy Criterion 3 of the NRC Policy Statement (Ref. 3).

(continued)

SUSQUEHANNA-UNIT 1 TS /B 3.8-66 Revision 1

PPL Rev.1 DC Sources-Shutdown B 3.8.5 BASES (continued)

LCO The DC electrical power subsystems are required to be OPERABLE as needed to support required DC distribution subsystems required OPERABLE by LCO 3.8.8, "Distribution Systems-Shutdown." This requirement ensures the availability of sufficient DC electrical power sources to operate the unit in a safe manner and to mitigate the consequences of postulated events during shutdown (e.g., fuel handling accidents and inadvertent reactor vessel draindown).

The DC electrical power subsystems consist of the following:

a) each Unit 1 DC electrical power subsystem identified in Table 3.8.4-1 including a 125 volt or 250 volt DC battery bank in parallel with a battery charger and the corresponding control equipment and interconnecting cabling supplying power to the associated bus; and, b) the Diesel Generator E DC electrical power subsystem identified in Table 3.8.4-1 including a 125 volt DC battery bank in parallel with a battery charger and the corresponding control equipment and interconnecting cabling supplying power to the associated bus.

APPLICABILITY The DC electrical power sources required to be OPERABLE in MODES 4 and 5 and during movement of irradiated fuel assemblies in the secondary containment provide assurance that:

a. Required features to provide adequate coolant inventory makeup are available for the irradiated fuel assemblies in the core in case of an inadvertent draindown of the reactor vessel;

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

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

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

The DC electrical power requirements for MODES 1, 2, and 3 are

- covered in LCO 3.8.4.

(continued)

SUSQUEHANNA - UNIT 1 TS /B 3.8-67 Revision 1

PPL Rev. 1 DC Sources-Shutdown B 3.8.5 BASES (continued)

ACTIONS The ACTIONS have been modified by a Note stating that LCO 3.0.3 is not applicable. This is acceptable because LCO 3.0.3 would not specify any additional actions while in MODE 4 or 5 and moving irradiated fuel assemblies.

A.1. A.2.1. A.2.2. A.2.3. and A.2.4 If more than one Unit 1 DC distribution subsystem is required according to LCO 3.8.8, the remaining operable Unit 1 DC subsystems may be capable of supporting sufficient required features to allow continuation of CORE ALTERATIONS, fuel movement, and operations with a potential for draining the reactor vessel. Therefore, the option is provided to declare required features with associated DC power sources inoperable which ensures that appropriate restrictions are implemented in accordance with the affected system LCOs' ACTIONS.

In many instances, this option may involve undesired administrative efforts. Therefore, the allowance for sufficiently conservative actions is made (i.e., to suspend CORE ALTERATIONS, movement of

irradiated fuel assemblies, and any activities that could result in inadvertent draining of the reactor vessel). Suspension of these activities shall not preclude completion of actions to establish a safe conservative condition. These actions minimize the probability of the occurrence of postulated events. It is further required to immediately initiate action to restore the required Unit 1 DC electrical power subsystems and to continue this action until restoration is accomplished in order to provide the necessary DC electrical power to the plant safety systems.

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

Condition A is modified by a Note that states that Condition A is not applicable to the DG E DC electrical power subsystem. Condition B or C is applicable to an inoperable DG E DC electrical power subsystem.

(continued)

SUSQUEHANNA-UNIT 1 TS I B 3.8-68 Revision 1

PPL Rev. 1 DC Sources-Shutdown B 3.8.5 BASES ACTIONS B.1 (continued)

If Diesel Generator E is not aligned to the class 1E distribution system, the only supported safety function is for the ESW system. Therefore, under this condition, if Diesel Generator E DC power subsystem is not OPERABLE, to ensure the OPERABILITY of the ESW system, actions are taken to restore the battery to OPERABLE status. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for other inoperable DC sources that result in a loss of safety function and provides sufficient time to evaluate the condition of the battery and take the corrective actions.

C.1 If the Diesel Generator E is aligned to the class 1E distribution system, the loss of Diesel Generator E DC power subsystem will result in the loss of a on-site Class 1E power source. Therefore, under this condition, if Diesel Generator E DC power subsystem is not OPERABLE actions are taken to either restore the battery to OPERABLE status or declare Diesel Generator E inoperable and take Actions of LCO 3.8.2. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for other DC sources that result in a loss of safety function and provides sufficient time to evaluate the condition of the battery and take the necessary corrective actions.

SURVEILLANCE SR 3.8.5.1 REQUIREMENTS SR 3.8.5.1 requires performance of all Surveillances required by SR 3.8.4.1 through SR 3.8.4.83. Therefore, see the corresponding Bases for LCO 3.8.4 for a discussion of each SR.

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

(continued)

SUSQUEHANNA-UNIT 1 TS / B3.8-69 Revision 1

PPL Rev. 1 DC Sources-Shutdown B 3.8.5 BASES (continued)

REFERENCES 1. FSAR, Chapter 6.

2. FSAR, Chapter 15.

3. Final Policy Statement on Technical Specifications Improvements, July 22, 1993 (58 FR 39132).

SUSQUEHANNA - UNIT 1 TS /B 3.8-70 Revision 1

PPL Rev. 1 Battery Geg-Parameters I B 3.8.6 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.6 Battery Co1-Parameters I BASES' BACKGROUND This LCO delineates the limits on battery float current as well as electrolyte temperature, level, and float voltage, and rpocific gravity for I the DC electrical power subsystems batteries. A discussion of these batteries and their OPERABILITY requirements is provided in the Bases for LCO 3.8.4, "DC Sources- Operating," and LCO 3.8.5, "DC Sources-Shutdown." In addition to the limitations of this Specification.

the Battery Monitoring and Maintenance Program also implements a program specified in Specification 5.5.13 for monitoring various battery parameters that is based on the recommendations of IEEE Standard 450-1995, IEEE Recommended Practice For Maintenance, Testing, And Replacement Of Vented Lead-Acid Batteries For Stationary Applications" (Ref. 4).

The batterv cells are of flooded lead acid construction with a nominal specific gravity of 1.215. This specific gravity corresponds to an open circuit battery voftage of approximately 124 V for a 60 cell battery (i.e..

cell voltage of 2.06 volts per cell (VWp). The open circuit voltage is the voltage maintained when there is no charging or discharging. Once fully charged with its open circuit voltage > 2.06 Vpc, the battery cell will maintain its capacity for 30 days without further charging per manufacturer's instructions. Optimal long-term performance however.

is obtained by maintaining a float voltage of 2.20 to 2.25 Vpc. This provides adequate over-potential, which limits the formation of lead sulfate and self-discharge. The nominal float voltage of 2.2 Vpc corresponds to a total float voltage output of 132 V for a 60 cell batter as discussed in the FSAR, Chapter 8 (Ref. 5).

APPLICABLE The initial conditions of Design Basis Accident (DBA) and transient SAFETY ANALYSES analyses in FSAR, Chapter 6 (Ref. 1)and Chapter 15 (Ref. 2), assume Engineered Safety Feature systems are OPERABLE. The DC electrical power subsystems provide normal and emergency DC electrical power for the diesel generators (DGs), emergency auxiliaries, and control and switching during all MODES of operation.

The OPERABILITY of the DC subsystems is consistent with the initial assumptions of the accident analyses and is based upon meeting the design basis of the unit. This includes maintaining DC sources identified in Table 3.8.4-1 OPERABLE during accident conditions, in the event of:

(continued)

SUSQUEHANNA - UNIT 1 TS / B3.871 Revision 1

PPL Rev. 1.

Battery Ge#-Parameters I B 3.8.6 BASES APPLICABLE SAFETY ANALYSES (continued) a. An assumed loss of all offsite AC or all onsite AC power, and

b. A worst case single failure.

Since battery eeU- parameters support the operation of the DC electrical I power subsystems, they satisfy Criterion 3 of the NRC Policy Statement (Ref. 3).

LCO Battery Gee4 parameters must remain within acceptable limits to ensure I availability of the required DC power to shut down the reactor and maintain it in a safe condition after an anticipated operational occurrence or a postulated DBA.

(continued)

SUSQUEHANNA - UNIT 1 TS / B3.8-72 Revision 1

PPL Rev. 1 Battery Geti-Parameters I B 3.8.6 BASES LCO glet.9elyte Battery parameter limits are conservatively established, (continued) allowing continued DC electrical system function even with Gategg~y and B limits not met. Additional preventative maintenance, testing, and monitoring Derformed in accordance with the Battery Monitoring and Maintenance Pro-gram is conducted as specified in Specification 5.5.13.

Programs and Manuals.

APPLICABILITY The battery eEl parameters are required solely for the support of the associated DC electrical power subsystem. Therefore, battery ell parameters are required to be within required limits only when the associated DC power source is required to be OPERABLE. Refer to the Applicability discussions in Bases for LCO 3.8.4 and LCO 3.8.5.

ACTIONS A Note has been added to provide clarification that, for the purpose of this LCO, separate Condition entry is allowed for each battery. This is acceptable, since the Required Actions for each Condition provide appropriate compensatory actions for each inoperable battery.

Complying with the Required Actions may allow for continued operation, and subsequent inoperable batteries are governed by subsequent Condition entry and application of associated Required Actions.

A.1, A.2, and A.3l With paramotrW of ono or more colkc in ono or moro battorios not within imritc (i.e., Categor^A limite not mn ctao-to._,

liiteno B man or Catogory A and B limite not mot) but within thoAC C limite FtogorY epoGifiod in Tablo 3.8.6 1, the battery ic degraded but thoroM sc till 6ufficiont capacity to perform thCintended function. Thoreforo, the affotc4d battr; ic -no rot;quird to be GEncidorod inoorFablo rsooly a_ a rasult of Catogory A or B limits not mat, and continuod oporation Is persm d for a limited porid.

Tho pilot gell oloctrolto loyal andr floeat voltage are rquiirod to be yAri.f7 to moot the Catogory G limite within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months (Requirad Action A.). Thir chock provides a quick indication of the status of tho romaindor of tho battery collc. Oni hour pro':ido timF toineport thO oloctrolto (continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-73 Revision 1

PPL Rev. 1 Battery Gell-Parameters I B 3.8.6 BASES ACTIONS A.. A.2. nd A.3 (continued) I lovol ind to confirM the float voltage of tho pilot coll. One hour i6 con1iderod a Fareacable amount of timR t peror the roguirod VerftatiGR.

'erificnati9R that tho Category C limits are met (Required AMtin AW.)

previdec, a6urance that during the time needed to reStoro the paramotere to tho Categery A and B limits, the batter,' ic cll c^apabloot performing itS intended function. A peIiod of - -hoursis allowed to complete the initial verific,.ation berause cperfc graVity mFoacrmAnRt muct be obtsinod for each vonnected cel. -Taking into consideration both theo time required to perform the required verification and the ass-urWan-e that the batte,' cell parameters am9 nRt rseYrely degraded, thir time icr concideed -eaoable.

r The erification ISrepeated at 7 day intorvalv until the parameters are restored to-Categor'y A and B limitc.

Thirs peiodic verification is cnRsistent With the normal Fre ef pilot coll Survoillancoc.

Cniued operation is oRly pwitted for 31 days before batter, cil_

pramareters FAt be restored to Within Catoegor A and B limits. T-aking into consideration that, while battery capacity ic dogradbd, sufficient capac;ity eXists to perfom the eintended function and to allowtime to full reoret8 the batte cell pramr to no I li , this Vine is accvoptablo for operation prior to declaring the DC bate*ries inoperable.

A.1. A.2. and A.3 I.

With one or more cells in one 125 VDC subsystem and/or one 250 VDC subsystem < 2.07 V. the battery cell is degraded. Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verification of the required battery charger OPERABILITY is made bv monitoring the ba.tery terminal voltage (SR 3.8.4.1) and of the overall battery state of charge bv monitoring the battery float charae current (SR 3.8.6.1). This assures that there is still sufficient battery capacity to perform the intended function. -Therefore, the affected battery is not required to be considered inoperable solely as a result of one or more cells < 2.07 V, and continued operation is 2ermitted for a limited period up to 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

(continued)

SUSQUEHANNA- UNIT 1 TS / B 3.8-74 Revision I

PPL Rev. I Battery GeII-Parameters B 3.8.6 BASES ACTIONS A.1, A.2, and A.3 (continued)

Since the Required Actions only specify "perform". a failure of SR 3.8.4.1 or 3.8.6.1 acceptance criteria does not result in this Required Action not met. However, if one of the SRs is failed the appropriate Condition(s), depending on the cause of the failures, isentered. If SR 3.8.4.1 or 3.8.6.1 is failed then there is not assurance that there is still sufficient battery capacity to perform the intended function and the battery must be declared inoperable immediately B.1 and B.2 One or more batteries in one 125 VDC subsystem and/or one 250 VDC 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 reflecting some loss of capacity. Within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months verification of the required batterv charger OPERABILITY is made bv monitoring the battery terminal voltage. If the terminal voltage is found to be less than the minimum established float voltage there are two possibilities, the battery charger is inoperable or is operating In the current limit mode. Condition A addressed charger inoperability. If the charger is operating in the current limit mode after 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months that is an indication that the battery has been substantially discharged and like]v 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 0.00333 hours 1.984127e-5 weeks 4.566e-6 months (Required Action B.2). The batterv must therefore be declared inoperable.

(continued)

SUSQUEHANNA- UNIT 1 TS / B 3.8-75 Revision 1

PPL Rev. 1 Battery Gell-Parameters B 3.8.6 BASES ACTIONS B.1 and B.2 (continued)

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 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , the battery will be restored to its fully charged condition (Required Action B.2) from any discharge that might have occurred due to a temporary loss of the battery charger. A discharged battery with float voltage (the charger setpoint) across its terminals indicates that the battery is on the exponential charging current portion (the second part) of its recharge cycle. The time to return a battery to its fully charged state under this condition is simply a function of the amount of the previous discharge and the recharge characteristic of the battery. Thus there is good assurance of fully recharging the battery within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , 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 batterv and 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is a reasonable time prior to declaring the battery inoperable>

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 appropriate Condition(s).

depending on the cause of the failure, is entered.

C.1, C.2, and C.3 With one 125 VDC subsystem and/or one 250 VDC subsystem with one or more cells electrolyte level above the toD of the plates, but below the minimum established design 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 level not met. Within 31 days the minimum established design limits for electrolyte level must be re-established.

(continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-7.6 Revision 1

PPL Rev. I Battery e#-Parameters B 3.8.6 BASES ACTIONS C.1, C.2. and C.3 (continued)

With electrolyte level below the top of the plates there is a potental for drvout and -late degradation. Required Actions C.1 and C.2 address this potential (as well as provisions in Specification 5.5.13, Battery Monitoring and Maintenance Program). They are modified by a note that indicates they are only applicable if electrolyte level is below the top of the plates. Within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months level is required to be restored to above the top of the plates. The Required Action C.2 requirement to verify that there is no leakage by visual inspection and the Specification 5.5.13.b item to initiate action to equalize and test in accordance with manufacturer's recommendations are taken from Annex D of IEEE Standard 450-1995. They are performed following the restoration of the electrolyte level to above the top of the plates. Based on the results of the manufacturer's recommended testing the battery may have to be declared inoperable and the affected cell(s) replaced.

D.1 With one 125 VDC subsystem and/or one 250 VDC'subsystem wth pilot cell temperature less than the minimum established design limits 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months is allowed to restore the temperature to within limits. A low electrolyte temperature limits the current and power available. Since the battery is sized with margin, while battery capacity is degraded.

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

E.1 With one or more batteries in redundant trains with battery parameters not within limits there is not sufficient assurance that battery capacit has not been affected to the degree that the batteries can still perfom 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 uwon 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 train in each DC subsystem or division within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

(continued)

SUSQUEHANNA -UNIT I TS / B 3.8-77 Revision I

PPL Rev. 1

- Battery Ge14-Parameters I B 3.8.6 BASES ACTIONS 8F.1 (continued)

When any battery parameter is outside the allowances of the Required Actions for Condition A. B. C. D. or E CatogoFy C limi -for any connoRtod oetI, sufficient capacity to supply the maximum expected load requirement is not ensured and the corresponding batter C eleotical powor cubsystom must be declared inoperable. Additionally, etheF potontially oxtrorr4 cndftionr, cuch as not comtpoting the Requirod Actiont of Condition A within tho roquirod Complotion Tiimo or avorago alotroyito tompoar iodif rolroclntatinto colc falling bDColoew 60F, a!po aro GaUGG for i!mmodGiatolV docGtaring the accociatodD ootia! vowor Gubeyctom inoporablo. discovering one or more batteries in one train with one or more battery cells float voltage less than 2.07 V and float current greater than 2 amps indicates that the battery caoacity may not be sufficient to perform the intended functions. The battery must therefore be declared inoperable immediately.

SURVEILLANCE SR 3.8.6.1 REQUIREMENTS Thic SR Y.eorifios that CatogoryA battory coll paramoteom aro concictont

.. ith+IEEE 150n (Rof. A)which rocommornder rog l-r lb^atstoer; ncpocior including Yoltago, 6P8cific graVity,, and oloctrlyto tomporaturo of pilot colIc. Tho SR muet bo porformod ovory 7 days, unloce (as spocifiod by tho Ntoin;rtho Froque or tho bato^r' is onoR ;;ualing GhaFo OFr ha6 boon on -qualizing char any tiren durng theo priouc 41days. Thi allowe tho routine 7 day Froguency to bo oxtondod until muth a timo that tho SR can bo proporly porformnod and moaningful rocultc obtained. Tho 4 day Froquoncy is nRt modifiod by the Noto, thuc rogardlocr of how ofton tho basory ij placod on oqualizing chargo,the Rnmutbo porformod ovorey 14 days.

Verifying battery float current while on float charge is used to determine the state of charge of the battery. Float charge is the condition inwhich the charger is supplying the continuous charge required to overcome the intemal losses of a battery and maintain the battery in a charaed state. The float current requirements are based on the float current indicative of a charged battery. Use of float current to determine the state of charge of the battery is consistent with IEEE-450 (Ref. 4). The 7 day freauency is consistent with IEEE-450 (Ref. 4).

-(continued)

SUSQUEHANNA-UNIT I TS / B 3.8-78 Revision I1

PPL Rev. I Battery Cell-Parameters B 3.8.6 BASES SURVEILLANCE SR 3.8.6.1 (continued)

REQUIREMENTS This SR is modified by a Note that states the float current reguirement is not required to be met when batterv terminal voltage is less than the minimum established float voltage of SR 3.8.4.1. When this float voltage is not maintained the Required Actions of LCO 3.8.4 ACTION A are being taken, which Drovide the necessary and apDropriate verifications of the battery condition. Furthermore, the float current limit of 2 amos is established based on the nominal float voltage value and is not directly applicable when this voltage is not maintained.

SR 3.8.6.2 and SR 3.8.6.5 Tho quartorly inspoction of spocific gravit, and voitago iScGncictont with IEEE 150 (Reof. 4). In addition, 'vithin 21 hourI of s battory diSchargo 110 V for s 125 VDC battory and - 220 V for a 250 VDC battory or a battory ovorchargo 160 V for a 1425 'VDC battory and i 300 Vfora 250 VDC battory, tho battory must bo domonstratod to moot Catogor;y limits. T-rancionts, cuch as m tortrting t tran6i9nt6, which may momont9rily CaSUE battory v eltage to drop to

110 'V for.8 125 'DC A a-"-t , -nd220 V for _ 250 VDC bafty, doenot conctituto a battoey discharg p pc-mdd-Atho d bayter; tormnhal voltago and:fot urrAont -otum

to-pr trnien.t value.. This incpwcti is Rlso conirstentRWith IrEE 10 (Ref. 1), which rocommonds special inspections following a sevoro diSehargo Or 9eV.rharge, to o9r..F that no rsignf;cant degrdation oef the bater;G occurs as a Gon69GuBRGe Of cuch diGcharge or oVrchargo.-

Optimal long term battery performance is obtained by maintaininq a float voltaae greater than or equal to the minimum established design limits provided by the battery manufacturer, which corresoonds to 132 V for the 125 V batteries and 264 V for the 250 V batteries'at the batterv terminals, or 2.2 Vpc. This Drovides adequate over-ootential. which limits the formation of lead sulfate and self-discharge, which could eventually render the battery inonerable. Float voltage in this range or less, but greater than 2.07 Vpc, are addressed in Specification 5.5.13.

SR's 3.8.6.2 and 3.8.6.5 require verification that the cell float voltages are equal to or greater than the short-term absolute minimum cell voltage of 2.07 V. The Frequency for cell voltage verification every 31 days for pilot cell and 92 days for each connected cell is consistent with IEEE-450 (Ref. 4).

(continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-79 Revision 1

PPL Rev. 1 Battery Cell-Parameters I B 3.8.6 BASES SURVEILLANCE SR 3.8.6.3 REQUIREMENTS (continued) Thi Survoilla nco vorifiecation that tho avorago tomporaturo ot roprocontativo colic ic within limit6 icconcictont with a rowommondation of IEEE 450 (Rof. 4) that tat that .tho porauro of oeotrolytoc in roprocontativo colic chould bo dotonminod ona quartorly bacic. Tho numbor9o f roprforntatiYo colAc h bomc doitormntod tbe 1fn0 colIc fora D battory W-d 20 colic for a 250 '!DG battVw_.

125 VDG IwFor than normal tomporatu9ro6 at t ihibt Or roeduc bateory capacity. Thi6 SR oneuroc that tho oporating tomporaturocs omain within an accrptablo oporating rango. This limit is bacod on MRlAnufturorra rocommonRdatione.

The limit specified for electrolyte level ensures that the plates suffer no physical damage and maintain adequate electron transfer capability.

The Frequencv is consistent with IEEE-450 (Ref. 4).

SR 3.8.6.4 This Surveillance verifies that the pilot cell temperature is greater than or equal to the minimum established design limit (i.e. 60OF). Pilot cell electrolyte temperature is maintained above this temperature to assure the battery can provide the required current and voltage to meet the design requirements. Temperatures lower than assumed in battery sizing calculations act to inhibit or reduce battery capacity. The Frequency is consistent with IEEE-450 (Ref. 4).

SR 3.8.6.6 I A battery performance discharge test is a test of constant current capacity of a battery. normally done in the as found condition, after having been in service, to detect any change in the capacity determined by the acceptance test The test is intended to determine overall battery degradation due to age and usage. I (continued)

SUSQUEHANNA - UNIT 1 TS / B 3.8-80 Revision 1

PPL Rev. 1 Battery Gell-Parameters B 3.8.6 BASES SURVEILLANCE SR 3.8.6.36 (continued)

REQUIREMENTS A battery modified performance discharge test is described in the Bases for SR 3.8.4.7. Either the batterv performance discharge test or the modified performance discharge test is acceDtable for satisfying SR 3.8.4.8: however, only the modified performance discharge test may be used to satisfy SR 3.8.4.8 while satisfying the requirements of SR 3.8.4.7 at the same time.

A modified performance discharge test is a test of the battery capacity and is ability to provide a high rate, short duration load (usually the highest rate of the duty cycle). This will 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.

The modified performance discharge test is a test of simulated duiy cycle consisting of two different discharge rates. The first dischane rate consists of the one minute published rate for the battery or the largest current loads of the duty cvclefollowed by a second discharge rate which employs the test rate for the performance discharge test.

These discharge rates envelop the duty cycle of the service test. Since the ampere-hours removed by a published one-minute discharge rate represent a very small portion of the battery capacity, the test rate can be changed to that for the performance discharge test without compromising the results of the performance discharge test. The battery terminal voltage for the modified performance discharge test should remain above the minimum battery terminal voltage specified in the service test.

When the batterv loads after the first minute exceeds the nerformance test discharge rate, the modified performance discharge test Is performed by first conducting the service test, than adiusting the discharge rate to the constant current value normally used for the performance discharge test. This test is terminated when the specified minimum battery terminal voltage is reached.

(continued)

SUSQUEHANNA - UNIT I TS /B 3.8-81 Revision.1

e PPL Rev. I Battery Ge4I-Parameters I B 3.8.6 BASES SURVEILLANCE SR 3.8.6.6 (continued)

REQUIREMENTS When the battery loads after the first minute exceeds the Performance discharge test rate, the battery capacity is calculated as follows: l

% of rated capacity at 25oC (77oF) =

K R Amer(to) x 100 LRated Ampere Hours Where: I

- K = Temperature Correction Factor from IEEE 450-1995 I

= Discharge Current in amps for n-th section I n= Duration of n-th section discharge in hour I n = Section number for each portion of the discharge including both service test and performance test portions I This % of rated capacity equation uses the temperature corrected Ampere-Hours instead of the temperature corrected discharge rates as specified in IEEE 450-1995. It is not possible to temperature correct the discharge rate without impacting the service test.

The acceptance criteria for this Surveillance is consistent with IEEE-450 (Ref. 8) and IEEE-485 (Ref. 11). These references recommend that the battery be replaced If its capacity is below 80% of the manufacturer's rating. A capacity of 80% shows that the battery rate of deterioration is increasing, even if there is ample capacftv to meet the load requirements.

(continued)

SUSQUEHANNA- UNIT I TS / B3.8-82 Revision 1.

PPL Rev. 1 Battery CeU-Parameters B 3.8.6 BASES SURVEILLANCE SR 3.8.6.6 (continued)

REQUIREMENTS The Frequency for this test is normally 60 months. If the battery shows degradation, or if the battery has reached 85% of its expected service 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 service life, the Surveillance Frequency is only reduced to 24 months for batteries that retain capacity > 100% of the manufacturers rating. Degradation is indicated, according to IEEE-450 (Ref. 8). when the battery capacity drops by more than 10% relative to its capacity on the previous performance test or when it is 10% below the manufacturer's rating. All these Frequencies are consistent with the recommendations in IEEE-450 (Ref. 8).

The SR is modified by a Note. The reason for the Note is that performing the Surveillance would remove a required DC electrical power subsystem from service, perturb the electrical distribution system, and challenge safety systems.

Tabl; 3.. 164 Thir tablo dolineatoe the limits on oloctrolyto level, float voltage, and GpefrIc gaiy fobr Too wdifFort catogoRAZ. The moaning of oach catoorFY ic diGcuSod beloew.

Catogory A dofinoc the normal parameter limit for oach docignatod pilot Goe! ;n eaeh battry. Tho coIIc coloctod a6 pilot clIc6 are th6et whoco tomporaturo, voltage, and oloctrolyto 6poc~ifi gravityroFeido an

iditi of Motate of Ghagoe of the nti;ro ba#ty.

(continued)

SUSQUEHANNA-UNIT 1 TS / B 3.8-83 Revision I

.i PPL Rev. I Battery Gele-Parameters I B 3.8.6 BASES SURV.EILIANGE SR Q.6a6 (cntinuod)

RRQUIREMFIITrs Thea ryA limit c cpocified for eolotrol)48 level arbased 9dR m~anufaGctUroF romod-Ationrc and- are consictent ':.ith the guidancae in IEEE '150 (Rof. 1), .vith tho extra 4 inch alo'waivanc above the high wateFr !oe!inRdiation for opoqiran rgin to accounlt for tepornature and chargo effoct . In addition to this allowaneo, fcotnoto (a)to Table 3.8.6 1 pormitG the oloctrolyto lovel to be above the especifod maximum lvele durng equalizing charge, provided it ic not eeArlowin.

Thoso R imitc ensure that the plates suffer no physical damage, and that adequate electRon tranfer capability i, maintained in the event of tr.AnSIen.t n._.,ditions.

._ EE 150 (R. 1e 4f. reommends wr th.at elec.vtroFlW level readings should be made only after the battry has beeR at float charge for at least 72 horeo.

The Categery A limit cpocified for float voltage ick 2.13 ' persell. This value i baed on the Frecommendation of lecg 150 (Ref. 4), whic states that prolonged operation of cAlls bolew 24.13 V can reduce the life expectanR oYf coic. Then ategory A!imit cper i fiod for rpEriflc gravFa for rach pilot cell Is *+/- 1.200 (0.01 5 below the mauflurf- egs 4Wly charged rnmiRal rpecific gravty Or a batte, chargiRg cUFrroRt that hadd

-tabhilized at l ow value). Thirs vale is characteristic Of a charged cell

vthadequate Gapacity.

According to 1EEE 450 (Ref. 4), the specifi gravity readings- are based on a temperature of ml- ("-- ). I The specific gravity readings are corrected for actual electrolyte temp9o Wre. For each 3oF (1 .67nG) above 77rrF (25,),I poiRt (0.001) is added to the roading; 1 point iE ubtracted for each 3tF bolow 77nF.

The sperifiG gravity of the oloctrolo in a oel! inrGeases with a lns et Water dI9o to lectrolycs or evaporation. I Category B defines the normal parameter limits for- ach conne6ted call. r l The termn "crnRneted cell" excludes an be'll that m1ay be jum~porod out:

(continued)

SUSQUEHANNA - UNIT I TS / B 3.8-84 Revision 1

0 PPL Rev. 1 Battery 6eUlParameters I B 3.8.6 BASES SURFVE41LLI E Tehblo

.'_.-h I _ _ _. Q.8.

.1 _ (ontinuod)

. \ }e REQUIREMENTS The Catogory B limitv cpocifiod for oloctrolyto lovol andfloatvoltago aro tho camo ac thoco cpocifiod for CatogoryA and havo boon dicrucsod abovo. The Gatogoey B iit P pocifid for pBOcfic grzvy foFr each onnoetod tl cel is 1.1 05 (0.020 bolow the manuf GtUro0c fully chargod, RnemiRnal erpcfic qaMv with tho averago of all Gennroted colc 1.205 (0.010 bolow tho manufacturor, fully chargod, nominal cpoesfic gravity).

Thoeo valuoc, a^r bacsd onmanufactUF9roroeOMMeodatlios. The minimum ; epoA rFavity YalUe rFguiretd1for alch colnuro tha tho effoct6 of a highly chargEd or nosly inetallod crll do not mask ovoral degradation Of tho bator'.

Catogor' C dofinoc tho limite for oach connoctod Gol. Thoeo valuoa, although roducod, pFovido acraRnco that cuffiioBnt capacity oeAt6 to perform tho intondod funVtion and maintain a margir of cafty.When

.ny ba.tory paramotor ic outrido tho Catogory C limite, the acurFaRoe o

^uffArIcnt capacity deoerbed aboe noG longr geF ard the baft

^r, muetb doFlard inoprsableh.

The Catogory C limit cpecified foFr elotrolto !oyo! (abov tho top of the platecrr aRd nRot eorfiwiRg) Rncuro that the plates cffer no physical damage and maintain adequate electron tranofor capability. Tho Catoego,' G alIowable limit for voltage is basd o n 1SEE 150 (Ref. 4),

wh4ich statecr that a oill l of 2.07 / or boloW, nRdrrloat onRditions t;tage and not cauoed by olovated tomporaturo oftho coll, indicatoc intomal cell problmeR and may rFeguio coil roplacomont.

Tho Catogory C limit on averago spocific gravity 2 1.10 5, is based on manUfac tUrorc roemmondationc (0.020 bolow the rnanufacturoe4 rocommondcd fully chargod, nominal cpoecA gravity). In addition to that limit, it is roquirod that tho cpocific gravity for each connoctod cot!1 muct bo no lecc than 0.090 bolow the avorago of all connoctod Gelic. Thic limit on9uroc that the offoct of a highly charged Or noW oel! doG nt mRakevorall degradation of tho batte;.

(continued)

SUSQUEHANNA-UNIT 1 TS / B 3.8-85 Revision 1

PPL Rev. 1 Battery ewParameters I B 3.8.6 BASES*

SU1RVEILLANCE T:hlo 3.-- 1 c (GOntirnuo)

REQUIREMENTS I Tho fonotoc to Table 3.8.6 1 that apply to rpocific gr va'ity ar applicablo to Catogory A, B, and C rpocific gravty.- FootRoto (b)-of Tablo 3.8.6 1 roquiroc tho abovo montionod corroction for oloctrolyto tomperatur. A battr' chargngR cu rrnet of 0.25 amp fo Glassr Cl E 250 V battororv and - 0.1 amp Clacc 1E 145 V battorio whon on float chaFrg ic a-oeptable for mnetiRng cpocfi gr~aity Iimitc boclauceo maintaining thie curront providoc an indication that tho 6tato of chango of theo batory is accoptablo.

BOCauEO of cpocific gravity gradionts that aro produGcd during tho rocharging procoe6, dolays of covoral dayc may occur whilo wating for tho cpocfic graitiy to stabilizo. Howeor, follovAinR a minaor attorwY rochargo (6uch as oqualizing chargo that dooc not follow a doop dicchargig) cpecific. gravity gradientc aro not 6ignificant. A ctabilized haPrgor curroet ic an accoptable altoemativo to spcifc graiy meacuromont for dotormining tho ctatoeof chargo. Thic phonomenon Ic diccuccod in IEEE 150 (Rof. 1). Footnoto (c)to Tablo 3.8.6 1 allows tho flat hargo eurrornt to be usod ac ar altmatr to

peoific graiy.

REFERENCES 1. FSAR, Chapter 6.

2. FSAR, Chapter 15.

3. Final Policy Statement on Technical Specifications Improvements, July 22, 1993 (58 FR 39132).

4. IEEE Standard 450.

5. FSAR. Chapter 8. I SUSQUEHANNA- UNIT I TS / B 3.8-86 Revision I

PPL Rev. 1 DC Sources-Operating B 3.8.4 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.4 DC Sources-Operating BASES BACKGROUND The DC electrical power system provides the AC emergency power system with control power. It also provides both motive and control powerto selected safety related equipment. 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 Unit 2 DC power sources provide both motive and control power to selected safety related equipment, as well as circuit breaker control power for the nonsafety related 13.8 kV, 4.16 kV, and 480 V and lower AC distribution systems. Each DC subsystem is energized by one 125/250 V battery and at least 1 Class 1E battery charger. The 250 V DC batteries for division I are supported by two 4alf-full capacity chargers; the 250 V DC batteries for division 11are supported by a full capacity charger; and, the 125 V DC batteries are each supported by a single full capacity charger. Each battery is exclusively associated with a single 125/250 VDC bus and cannot be interconnected with any other 125/250 VDC subsystem. The chargers are supplied from the same AC load groups for which the associated DC subsystem supplies the control power. Transfer switches provide the capability to power Unit 1 and common DC loads from Unit 2 DC sources.

Diesel Generator (DG) E DC power sources provide control and instrumentation power for DG E.

During normal operation, the DC loads are 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 loads are automatically powered from the station batteries.

The DC power distribution system is described in more detail in Bases for LCO 3.8.7, "Distribution System-Operating," and LCO 3.8.8, "Distribution System-Shutdown."

(continued)

SUSQUEHANNA - UNIT 2 TS / B 3.8-56 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES BACKGROUND Each battery has adequate storage capacity to carry tho required load (continued) continuously for approximately I hours. to meet the dutv cycle discussed in the FSAR. Chanter 8 (Ref. 12). The battery is designed with additional capacity above that required by the design duty cycle to allow for temperature variations and other factors.

Each subsystem, including the battery bank, chargers and DC switchgear, is located in an area separated physically and electrically from the other subsystems 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, or battery chargers.

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

The minim'um design voltage limit is 105/210 V-Wat the batterv'terminals.

The battery cells are of flooded lead acid construction with a nominal specific gravitv of 1.215. This specific gravity corresponds to an open circuit voltage of approximately 124 V for a 60 cell battery (i.e., cell voltage of 2.06*volts percell (Vpc)). The open circuit voltage is the volthae maintained when there is no charging or discharging. Once fully charged with its open circuit voltage 2 2.06 VPc. the battery cell will maintain its capacity for 30 days without further charging per manufacturer's instructions. Optimal lona term Performance however, is obtained by maintaining a float voltage of 2.20 to 2.25 VPc. This provides adequate over-potential, which limits the formation of lead sulfate and self discharge. The nominal float voltage of 2.2 Vpc corresponds to a total float voltage output of 132 V for a 60 cell battery as discussed in the FSAR. Chanter 8 (Ref. 12).

Each battery charger of DC electrical power subsystem has ample power output capacity for the steady state operation of connected loads required during normal operation, while at the same time maintaining its battery bank fully charged. Each battery chargerhas sufficient capacity to restore the battery from the design minimum charge to its fully charged state within design basis requirements while supplying normal steady state loads (Ref. 312).

(continued)

SUSQUEHANNA - UNIT 2 TS / B3.8-57 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES BACKGROUND The battery charger is normally in the float-charge mode. Float-charge is (continued) the condition in which the charger is suoplying the connected loads and the battery cells are receiving adequate current to ontimally 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 char'er is operated in the equalize mode after a battery discharge or for routine maintenance.

Following a battery discharge, the battery recharge characteristic accents current at the current limit of the battery charger (if the discharge was significant. e.g. following a battery service test) until the batterv terminal voltage approaches the charger voltage setpoint. Charging current then reduces exponentially during the remainder of the recharge cycle. Lead-calcium batteries have recharge efficiencies of greater than 95%. so once'at least 105% of the a'm'ere-hours disch'gare'd have been returned.

the'baterv&c6aacity would be restoredto6the' same condition as it was Prior to the discharge. This can be monitored by direct observation of the exponentiallydecaving ch'argqing current or by evalu'itinigthe amp-hours discharged from the battery and'amp-hours returned to the battery.

APPLICABLE The initial conditions of Design Basis Accident (DBA) and transient SAFETY ANALYSES analyses in the FSAR, Chapter 6 (Ref. 4) and Chapter 15 (Ref. 5),

assume that Engineered Safety Feature (ESF) systems are OPERABLE. The DC electrical power system provides normal and emergency DC electrical power for the DGs, emergency auxiliaries, and control and switching during all MODES of operation. The OPERABILITY of the DC subsystems is consistent with the initial assumptions of the accident analyses and is based upon meeting the design basis of the unit. This includes maintaining DC sources OPERABLE during accident conditions in the event of:

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

b. A worst case single failure.

The DC sources satisfy Criterion 3 of the NRC Policy Statement (Ref. 6).

(continued)

SUSQUEHANNA - UNIT 2 TS / B3.8-58 Revision 2

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

LCO The DC electrical power subsystems 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 DC electrical power subsystem does not prevent the minimum safety function from being performed (Ref. 312).

The DC electrical power subsystems include:

a. each Unit 2 and Unit 1 DC electrical power subsystem identified in Table 3.8.4-1 including a 125 volt or 250 volt DC battery bank in parallel with a battery charger and the corresponding control equipment and interconnecting cabling supplying power to the associated bus; and,

b. the Diesel Generator E DC electrical power subsystem identified in Table 3.8.4-1 including a 125 volt DC battery bank in parallel with a battery charger and the corresponding control equipment and interconnecting cabling supplying power to the associated bus.

APPLICABILITY The DC electrical power sources are required to be OPERABLE in MODES 1, 2, and 3 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 4 and 5 are addressed in the Bases for LCO 3.8.5, 'DC Sources-Shutdown."

(continued)

SUSQUEHANNA - UNIT 2 TS / B3.8-59 Revision 2

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

ACTIONS A.1 Condition A represents one subsystem with a loss of ability to completely respond to an event, and a potential loss of ability to remain energized during normal operation. It is therefore imperative that the operator's attention focus on stabilizing the unit, minimizing the potential for complete loss of DC power to the affected division. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for an inoperable DC Distribution System division.

If one of the required DC electrical power subsystems is inoperable, (e.g., inoperable battery, inoperable battery charger(s), or inoperable battery charger and associated inoperable battery), the remaining DC electrical power subsystems have the capacity to support a safe shutdown and to mitigate an accident condition. Since a subsequent worst case single failure could, however, result in the loss of minimum necessary DC electrical subsystems to mitigate a worst case accident, continued power operation should not exceed 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months . The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months Completion Time is based on Regulatory Guide 1.93 (Ref. 7) 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.

Condition A is modified by a Note that states that Condition A is not applicable to the DG E DC electrical power subsystem.

Condition C or D is applicable to an inoperable DG E DC electrical power subsystem.

B.1 and B.2 If the inoperable Unit 2 DC electrical power subsystem cannot bel restored to OPERABLE status within the required Completion Time, the unit must be brought to a MODE in which the LCO does not apply. To achieve this status, the unit must be brought to at least MODE 3 within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and to MODE 4 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . The allowed Completion Times are reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems. The Completion Time to bring the unit to MODE 4 is consistent with the time required in Regulatory Guide 1.93 (Ref. 7).

(continued)

SUSQUEHANNA- UNIT 2 TS / B3.8-60 Revision 2

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

If Diesel Generator E is not aligned.to the class 1E distribution system, the only supported safety function is for the ESW system. Therefore, under this condition, if Diesel Generator E DC power subsystem is not OPERABLE actions are taken to either restore the battery to OPERABLE status or shutdown Diesel Generator E and close the associated ESW valves in order to ensure the OPERABILITY of the ESW system. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for other inoperable DC sources and provides sufficient time to evaluate the condition of the battery and take the corrective actions.

D.1 If the Diesel Generator is aligned to the class 1E distribution system, the loss of Diesel Generator E DC power subsystem will result in the loss of a on-site Class 1E power source. Therefore, under this condition, if Diesel Generator E DC power subsystem is not OPERABLE actions are taken to either restore the battery to OPERABLE status or declare Diesel Generator E inoperable and take Actions of LCO 3.8.1. The 2 hour2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months limit is consistent with the allowed time for other DC sources and provides sufficient time to evaluate the condition of the battery and take the necessary corrective actions.

E.1 and E.2 With one or more DC Unit 1 DC power subsystems inoperable, the remaining DC electrical power distribution subsystems are capable of supporting the minimum safety functions necessary to shut down the reactor and maintain it in a safe shutdown condition, assuming no single failure. However, overall reliability is reduced because a single failure in the remaining DC electrical power distribution subsystems could result in the minimum required ESF functions not being supported. The Completion Time of 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months is consistent with the Completion Times associated with a loss of one or more DC distribution subsystems and will allow sufficient time to restore power.

(continued)

SUSQUEHANNA - UNIT 2 TS / B 3.8-61 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES ACTIONS E.1 and E.2 (continued)

Completion of Required Action E.1 causes Unit 1 loads to be powered from a Unit 2 DC electrical power subsystem. Although the corresponding Unit 2 DC electrical power subsystems are evaluated for this condition, the CONDITION violates a design commitment to maintain DC power separation between units. To minimize the time this condition exists, Required Action E.2 directs power to be restored to the corresponding Unit I DC electrical power subsystem, which restores power to the common loads, or requires that the Unit 1 and common loads be declared inoperable. The Completion Time of 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months provides sufficient time to restore power and acknowledges the fact that the condition, although not consistent with all design requirements, maintains all required safety systems available.

F.1 If Unit 1 and common loads required to support Unit 2 cannot be transferred to corresponding Unit 2 DC electrical power subsystem when Unit 1 DC sources are inoperable; or, cannot be transferred back to a Unit 1 DC source when the Unit 1 DC source becomes OPERABLE, the associated loads may be incapable of performing their intended function and must be declared inoperable immediately.

(continued)

SUSQUEHANNA - UNIT 2 TS / B3.8-62 Revision 2

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

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 system and tho ability of the battorieo to performR their iended funcetion.

Float charge is the condition in which the charger is supplying the continuous charge required to overcome the internal losses of a battery (or battey cell)- and maintain the battery (or a batteoy Gell) in a fully charged state. while supplying the continuous steady state loads of the associated DC subsystem. On float charge, battery cells will receive adequate current to optimally charge the battery. The voltage requirements are based on the nominal design voltage of the batterv and are consistent with the minimum float voltage established by the battery manufacturer (2.20 VPc or 132 V at the battery terminals). This voltage maintains the battery plates in a condition that supports maintaining the grid life (expected to be approximately 20 years). -The voltage reqirernents aro conriStent With the initial voltages assumed in the battery sizing calculations. The SR must be performed every 7 days consistent with manufacturer recommendations and IEEE-450 (Ref. 8).

Howovor, this Frequoncy is modifiod by a Note that allows the Froquency to be oenAded for up to 14 days wheR the batter is onoalize charge Or has boon on equalize charge any timo during tho provious 24 hourm.

This change recognizs th.o routine 7 day .roquoncy must bo obondod until 24 hoers aoranquaize chargo is cemplotod so that meaningful rosults aro obtained for this SR. Tho 14 day Frequency is not modifiod by the Note, therefore, tho SR must be performed every 14 days regardless of how ofton the batter.y is placed on oqualize charge.

I Visual inspection to detect corrosion of tho batter y celil and connections; or, m.easuremnt of tho reaihtanc ofach inter col, in~tr rack, inter tier, and termnial ceAnnoctin with corrosion, Oisiblo pro;doAr an indication that there is no physiral damage orabnormaladeterioratin that could potentially degrade battery performance.

(continued)

SUSQUEHANNA - UNIT 2 TS / B 3.8-63 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.2 (continued)

REQUIREMENTS The connoction resistance limits established for this SR provido two acceptanco limits for any connection where thero is visiblo Signs of corrosion. The first limit, if met, requires no additional actions and ensres the desigRn apability' of the batter; is maiRtaiRed. if the second limit is used, the calculated average resistaRne for the a-rseiated batter determined is SR 3.8.1.5 shall be recalculated using the new resistance value. Resistance valves shall be measured for only thosoe connection where there is visible signR of corroFien. To determiRe the average connection resistance, data from the per-frmaRGe of SR 3.8.4.5 can be used for unaffected connections.

The Frequency for these inspections, which can detect conditions that raRn ause power losses due to resstance heatIn, ;s 02 days. Thir Frequency is considered acceptable based on operating experience related to detecting corrosion trends.

I Visual inspection of the battery cells, cell plates, and bate*ry racks providesr an in;dication of physical damage or abnormnl deteoraetioR that could potentially degrade battery performance. The psreence, ef physical damago or deterioration does not represent a failure of this SR, provided an evaluation determines that the physical damage or deterioration does net affect the OPERABILITY of the batteh-(its abilit' to perform its design function).

The F=requency of this SR isaetb lebause ether admiirstrative controls ensure adequate battery performance during the 18 month interwal. UFthermore, opertinrg experience has shown there components usually pass the Surveillanco when performed at the 18 month Frequency; therefere, the Frequency iEacceptable from a reliability standpeont.

(continued)

SUSQUEHANNA - UNIT 2 TS / B 3.8-64 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.4and SR 3.8.4.65 REQUIREMENTS (G9rtieUed) Visual inspection and resistance moacuromente of inter coll, intor rack, i1ter tier, and terminal connections pro'i.ider a^n indication of physical damage or abnormal dotorioration that could indicate degraded batter' condition. The anti corrosion material is used to help ensuro good electrical connections and to reduce terminal doterioration. Tho visual inspection for corrosion is not ntondod to require remoeal of and inmG.eDeon under oac.h terminal connection.

The removal of visible corrosion is a preventive maintenance SR.

The preseRnc of visible corrosin does ret necessarily reprreAnt a failure of thir SR, pvidedAsible corron emoved during performance of this Surveillanco. The connection rFesistance limits for this SR must be bole'w the limits specified in the SR.

The clcu lated average resistance limits ensures that the total voltage drop acrosc the battory connections is censiFtent to these assumed in the battery calculations, while the uppor limit for batter' rFesistancq prevents the pessibiity of batter' disrchare duo to Gvor.heafng of the connections.

The Frequency of this SR is accoptablo because other administrative ontrol ensure adequate bater,perfoancRr e during tho 18 mRonth intorval. FurFthormoro, operating experience has shown these components usually pass the Survoillanco when performed at the 18 month Frequency; therefore, the Frequency is aceptable from a reliabilit; standpoint.

(continued)

SUSQUEHANNA - UNIT 2 TS / B3.8-65 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.62 I REQUIREMENTS (continued) Battery charger capabilit' rMquiromonts are based on This SR verifies the design capacity of the battery chargers (Ref4. According to Regulatory Guide 1.32 (Ref. 9), the battery charger supply is required recommended 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 requires that each battery charaer be capable of suDpivina DC current to its associated batterv bank at the minimum established float voltage for greater than or equal to 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . The ampere requirements are based on the output rating of the chargers. The voltage requirements are based on the charger voltage level after a response to a loss of AC power. The time period is sufficient for the charger temperature to have stabilized and to have been maintained for at least 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

The Frequency is acceptable, given the unit conditions required to perform the test and the other administrative controls existing to ensure adequate charger performance during these 24 month intervals. In addition, this Frequency is intended to be consistent with expected fuel cycle lengths.

(continued)

'SUSQUEHANNA- UNIT 2 TS I B 3.8-66 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.73 REQUIREMENTS (continued) A battery service test is a special test of the battery's capability, as found, to satisfy the design requirements (battery duty cycle) of the DC electrical power system. The test can be conducted using actual or simulated loads. The discharge rate and test length corresponds to the design duty cycle requirements as specified in Reference 12.

The Frequency of 24 months is consistent with the recommendations of Regulatory Guide 1.32 (Ref. 9) and Regulatory Guide 1.129 (Ref. 10),

which state that the battery service test should be performed during refueling operations or at some other outage, with intervals between tests not to exceed 24 months.

This SR is modified by a-two Notes. Note 1 Whinh allows only the performance of a modified performance discharge test SR 3.8.6.6 in lieu of a service test SR 3.8.4.3enco per 60 months.

A modified performance dirchaFge teEst ie a test of the battery capacity and its ability to provide a high rate, short duration load (usually the highoert rate of the duty cyclGe ThiFill confirnm the batteyc' ability to moot the critical period of the load duty cycle, in addition to determining its percentage of ratod capacity. Initial conditions for the modified performance discharge tesrt hould be identical to these specifid fo seivige test-.

The modified performance discharge test is a test of simulated duty cycleolnsisting of te different diBharge rFates. The first discharer rate consists of the one minute published rate for the battory or the largest current loads of the duty cycle followed by a cond discharge rate which employs the test rate for tho performance discharge test.

These discharge rates envelope the duty cycle of the sorvce test.

Since theampere hoursremoed by a published one mninute disharge rate reresent a ve; syll portion f the batter' capacity, the test rate can be changed to that for the performance discharge test without compromising the results of the performance discharge test. The batter; terminal voltage for the modified porformanRc discharge test should remain above the minimum battery terminal voltage specified in the ser.ice test.

(continued)

SUSQUEHANNA - UNIT 2 TS / B 3.8-67 Revision 3

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.7 (continued)

REQUIREMENTS When the battory loads aftor tho first minuto oxcoods the performance test dirchargo rate, the modified performance discharge teWt is performed by first conducting the sewrice test, then adjusting the discharF e rato to the constant current v.'alue normally usod for tho performance diecharge test. This test is terminated when tho specified miniimum batter; termninal ':oltage irs reached.

When the battery loads aftor the firet minute exceeds the porformanco dischagoe ts rate, the batter' capacity is clcaulated as fellows: I

°, of rated capacity at 250C (770F) -

X l ] x 100 Rated Ampere Hours Where:

K - Temperature Correction Factor from !EEE 460 1-95

- DGscharge Current in amps for n th section

= Duration of n th section discharge in hour n Section number for each portion of the discharge, including both service test and performance test portions ThiS °,' of rated capacity equation use6 the temperature correctod Ampere Hours instead of the temperature corrected discharge rates as, specified in IEE 50; 1405. It is net possible to te cect the discharge rate without impacting the ser^Ace test.

(continued)

SUSQUEHANNA - UNIT 2 TS / B 3.8-68 Revision 3

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR 3.8.4.7-3 (continued) I REQUIREMENTS The SR iEmodified by a NotoThe reason for the-Note 2 is that performing I the Surveillance would remove a required DC electrical power subsystem from service, perturb the Electrical Distribution System, and challenge safety systems. Credit may be taken for unplanned events that satisfv the Surveillance. Examples of unplanned events may include:

1. Unexpected operational events which cause the equipment to perform the function specified by this Surveillance, for which adequate documentation is available: and

2. Post maintenance testing that requires performance of this Surveillance in order to restore the component to OPERABLE.

provided the maintenance was required, or performed in coniunction with maintenance required to maintain OPERABILITY or reliability.

SR -8A48 I A bahe; perfornmance discharge test is A tert of coRstant current crapacity of a baflo', noremally done in the as fnd condition, aft-o having boon in service, to detect any change in the capacity determined by the acceptance test. The test is intended to determine overall battoer degra~dation duo to ago and usage.

A battery modified performance discharge test is described in the Bases forFSR3.8.1.7. Eithorthe bate'performance dir.ceharge testor the modified perftrormnce discharg test is acceptable foF satisfying SR 3.8.1.8; however, only the modified performance discharge test may be used to satisfy SR 3.8.4.8 while satisfying the requirements of SR 3.8.1.7 at tho same time.

The acceptanecitrafor this Surveillance is consistent with IFEEE 150 (Ref. 8) and IEEE 185 (Ref. Th r .1). eS recommend that the battor;y be replaced if its capacity is below 80% of the manufacturer's rating. A capacity of 80% sh6ws that the battery rate of deterioration is inreasiRng, even if thore is ample capacity to meet the lead requiremeRnts (continued)

SUSQUEHANNA - UNIT 2 .TS / B3.8-69 Revision 2

PPL Rev. 1 DC Sources-Operating B 3.8.4 BASES SURVEILLANCE SR ... (con tinued) I REQUIREMENTS The Frequency for this test is normally 60 months. If the battery shows degradation, or if the battery harroached 850% f its expected servioe life and rapacit' iso 100%0o of the mAnaufaGtMF9s ratirng tho Surveillance Frzequenc is roeduod to 12 monnths. However,of tho batot'y chews no degradation but has reached 85% of its oxpectod service life, the Surveillance Frequency is only reduced to 21 months for baIorios that retain capacity ! 100% of the manufacturor's rating. Degradation is in4dicated, acorFdiRn to ICEEE 50 (Ref. 8), when the batter' ^apacish drops by mere than 10% relative to its capacity on the previous performance test or when it is 10% below the manufacturGe' rating. All these Frequenciesare consirtent with the remrnmendations in IEEE-150 (Ref.8)

The SR is modified by a Note. The reason for the Note is that performing the Suve'llanon weuld removea raequrked DC electrical power subsystem from service, perturb the Electrical Distribution System, and challenge safetyeytems SR 3.8.4.94 I This Surveillance is provided to direct that Surveillances for the Unit 1 DC sources required to support Unit 2 are governed by the Unit 2 Technical Specifications. When Unit 1 DC Sources are required to be Operable to support Unit 2, the Unit 1 Surveillances must be met. Performance of a Unit 1 Surveillance at the specified Frequency will satisfy Unit 2 requirements.

When Unit 1 is in MODE 4 or 5 or moving irradiated fuel assemblies in the secondary containment, a Note to SR 3.8.5.1 specifies that some SRs are required to be met but do not have to be performed. The Note to Unit 2 SR 3.8.5.1 states that the Note to Unit 1 SR 3.8.2.1 is applicable if Unit 1 is in MODE 4 or 5. This ensures that Unit 2 Technical Specifications do not require a Unit 1 SR to be performed, when the Unit 1 Technical Specifications does not require performance of a Unit 1 SR.

(continued)

SUSQUEHANNA - UNIT 2 TS / B 3.8-70 Revision 2

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

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

2. Regulatory Guide 1.6.

3. IEEE Standard 308.

4. FSAR, Chapter 6.

5. FSAR, Chapter 15.

6. Final Policy Statement on Technical Specifications Improvements, July22, 1993 (58 FR 39132).

7. Regulatory Guide 1.93.

8. IEEE Standard 450.

9. Regulatory Guide 1.32, February 1977.

10. Regulatory Guide 1.129, April 1977, February 1978.

11. IEEE Standard 485483. I

12. FSAR Chapter 8, Section 8.3.2.1.1.6.

SUSQUEHANNA - UNIT 2 TS / B3.8-71 Revision 3

PPL Rev. 1 DC Sources-Shutdown B 3.8.5 B 3.8 ELECTRICAL POWER SYSTEMS B 3.8.5 DC Sources-Shutdown BASES . I BACKGROUND A description of the DC sources is provided in the Bases for LCO 3.8.4, "DC Sources-Operating."

APPLICABLE The initial conditions of Design Basis Accident and transient analyses in SAFETY ANALYSES the FSAR, Chapter 6 (Ref. 1) and Chapter 15 (Ref. 2), assume that Engineered Safety Feature systems are OPERABLE. The DC electrical power system provides normal and emergency DC electrical power for the diesel generators (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 the requirements for the supported systems' OPERABILITY.

The OPERABILITY of the minimum DC electrical power sources during MODES 4 and 5 and during movement of irradiated fuel assemblies ensures that:

a. The facility 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 an inadvertent draindown of the vessel or a fuel handling accident.

LCO 3.8.5 is normally satisfied by maintaining the OPERABILITY of all Division I or all Division II DC sources listed in Table 3.8.4-1 and the Diesel Generator E battery bank. However, any combination of DC sources that maintain OPERABILITY of equipment required by Technical Specifications may be used to satisfy this LCO. The DC sources satisfy Criterion 3 of the NRC Policy Statement (Ref. 3).

(continued)

'SUSQUEHANNA - UNIT 2 TS / B 3.8-70 Revision I