BSEP 17-0078, Request for License Amendment - DC Sources - Operating Surveillance Requirement (SR) 3.8.4.5

Request for License Amendment - DC Sources - Operating Surveillance Requirement (SR) 3.8.4.5

ML17277A855
Person / Time
Site:	Brunswick
Issue date:	10/03/2017
From:	William Gideon Duke Energy Progress
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
BSEP 17-0078
Download: ML17277A855 (41)

Text

(~ DUKE ENERGYe October 3, 2017 Serial: BSEP 17-0078 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

Subject:

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Renewed Facility Operating License Nos. DPR-71 and DPR-62 Docket Nos. 50-325 and 50-324 William R. Gideon Vice President Brunswick Nuclear Plant P.O. Box 10429 Southport, NC 28461 0: 910.457.3698 10 CFR 50.90 Request for License Amendment - DC Sources - Operating Surveillance Requirement (SR) 3.8.4.5 Ladies and Gentlemen:

Pursuant to the provisions of the Code of Federal Regulations (CFR), Title 10, Part 50.90, Duke Energy Progress, LLC (Duke Energy), hereby requests a revision to the Technical Specifications (TS) for the Brunswick Steam Electric Plant (BSEP), Unit Nos. 1 and 2.

The proposed amendment would revise Surveillance Requirement (SR) 3.8.4.5 contained in TS 3.8.4, "DC Sources - Operating." Specifically, the TS change proposes to amend the required supplied amperage of the battery chargers contained within SR 3.8.4.5. provides an evaluation of the proposed TS changes. Enclosures 2 and 3 provide the existing TS pages marked-up to show the proposed changes for Unit 1 and 2, respectively.

Enclosures 4 and 5 provide revised (i.e., typed) TS pages for Unit 1 and 2, respectively.

Enclosures 6 and 7 provide relevant sections of BSEP Calculations, BNP-E-6.079, Revision 6, "125 V DC Battery Charger Sizing Calculation," and BNP-E-6.120, Revision 10, "DC System Battery Load Study," respectively, related to the topic of this license amendment request.

Duke Energy requests approval for the proposed amendment by October 3, 2018, with a 120-day implementation period.

In accordance with 10 CFR 50.91 (b)(1 ), Duke Energy is providing the State of North Carolina with a copy of the proposed license amendment.

This document contains no regulatory commitments.

Please refer any questions regarding this submittal to Mr. Lee Grzeck, Manager - Regulatory Affairs, at (910) 457-2487.

U.S. Nuclear Regulatory Commission Page 2 of 3 I certify under penalty of perjury that the foregoing is true and correct. Executed on October 3, 2017.

Sincerely, wd)

William R. Gideon WRG/mkb

Enclosures:

1. Evaluation of the Proposed Change

2. Proposed Unit 1 BSEP TS (Markup)

3. Proposed Unit 2 BSEP TS (Markup)

4. Proposed Unit 1 BSEP TS (Retyped Pages)

5. Proposed Unit 2 BSEP TS (Retyped Pages)

6. BSEP Calculation BNP-E-6.079, Revision 6, "125 V DC Battery Charger Sizing Calculation" (relevant sections)

7. BSEP Calculation BNP-E-6.120, Revision 10, "DC System Battery Load Study" (relevant sections)

U.S. Nuclear Regulatory Commission Page 3 of 3 cc (with enclosures):

U.S. Nuclear Regulatory Commission, Region II ATIN: Ms. Catherine Haney, Regional Administrator 245 Peachtree Center Ave, NE, Suite 1200 Atlanta, GA 30303-1257 U.S. Nuclear Regulatory Commission A TIN: Mr. Andrew Hon (Mail Stop OWFN 8G9A)

(Electronic Copy Only) 11555 Rockville Pike Rockville, MD 20852-2738 Andrew.Hon@nrg.gov U.S. Nuclear Regulatory Commission ATIN: Mr. Gale Smith, NRG Senior Resident Inspector 8470 River Road Southport, NC 28461-8869 Mr. W. Lee Cox, Ill, Chief (Electronic Copy Only)

Radiation Protection Section NC Department of Health and Human Services 1645 Mail Service Center Raleigh, NC 27699-1645 lee.cox@dhhs.nc.gov Chair - North Carolina Utilities Commission (Electronic Copy Only) 4325 Mail Service Center Raleigh, NC 27699-4300 swatson@ncuc.net

Evaluation of the Proposed Change BSEP 17-0078 Page 1 of 5

Subject:

Request for License Amendment - DC Sources - Surveillance Requirement (SR) 3.8.4.5

1.

Summary Description Duke Energy Progress, LLC (Duke Energy), is requesting Nuclear Regulatory Commission (NRC) approval of the proposed revision to the Technical Specifications (TSs) for the Brunswick Steam Electric Plant (BSEP), Unit Nos. 1 and 2. The proposed amendment would revise Surveillance Requirement (SR) 3.8.4.5 contained in TS 3.8.4, "DC Sources - Operating."

Specifically, the TS change proposes to amend the required supplied amperage of the battery chargers contained within SR 3.8.4.5.

2.

Detailed Description 2.1.

Proposed Change The proposed change revises the required supplied amperage of the battery chargers contained within SR 3.8.4.5. Specifically, the proposed change would revise the required battery charge supplied amperage from greater than 250 amps to greater than 300 amps. The other requirements (i.e., voltage and time) of the battery chargers contained in SR 3.8.4.5 are unaffected.

2.2.

Background

Currently, TS SR 3.8.4.5 requires, "Verify each required battery charger supplies ~ 250 amps at~ 135 volts for~ 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />." The safety-related battery chargers in-service at BSEP were purchased with a 300 amp continuous rating and a 375 amp current limit rating.

Historically, BSEP's battery charger calculation, "125 V DC Battery Charger Sizing Calculation" (i.e., BNP-E-6.079), provided, in part, as Enclosure 6, credits the 300 amp battery charger capability based on the charger's continuous current rating. However, BSEP did not actually require the battery chargers to supply greater than 250 amps until after the 2013 NRC Component Design Basis Inspection (CDBI). During the 2013 NRC CDBI, it was discovered that the DC System Battery Load Study (i.e., BNP-E-6.120), provided, in part, as Enclosure 7, credited transfer of specific non-safety loads (i.e., uninterruptible power supply (UPS) and lighting, and communications inverters) from the batteries to the alternating current (AC) source once AC bus power was restored. Due to the specific loads being non-safety related, their transfer cannot be credited.

BN P-E-6.120 now relies on at least 300 amps to be supplied from the battery chargers. As such, SR 3.8.4.5 is being revised to reflect actual plant calculations.

3.

Technical Evaluation The electrical power system at BSEP comprises various AC and direct current (DC) systems.

The 125/250 volt DC power supply system consists of batteries and battery chargers, associated buses, electrical circuitry, switches, indicators, and alarm devices required for operation and surveillance of the system.

3.1.

125/250 VDC Power System Description BSEP 17-0078 Page 2 of 5 The purpose of the 125/250 VDC Power System is to ensure sufficient power will be available to supply safety-related equipment required for the safe shutdown of the facility and the mitigation and control of accident conditions within the facility. Each unit contains two separate and redundant divisions for all equipment and wiring associated with Engineering Safety Features (ESF) and their supporting systems. The 125/250 VDC system provides reliable motive and control power to the ESF loads such that no single credible event can disable the containment isolation function or prevent the standby cooling systems from performing their intended functions.

Each unit contains a 125/250 VDC Power System which consists of two separate divisions. Each division contains two 125 VDC batteries wired in a series/parallel arrangement to its distribution panel to allow for 125 VDC or 250 VDC loading. Each battery contains its own independent charger. The major loads supplied by this system are 250 voe valve operators and pumps, and 125 voe control/logic systems, plant annunciation, and emergency lighting. Each of the 125 VDC battery chargers is provided with AC power via their respective division Emergency Bus.

3.2.

Revise the Required Supplied Amperage of SR 3.8.4.5 Prior to 2013, the battery load study calculation was based on a battery duty cycle of one minute for a Loss of Offsite Power (LOOP)/Loss of Coolant Accident (LOCA) event. At the end of the one minute LOOP/LOCA duty cycle, the chargers are credited for supplying the DC system with sufficient margin available for battery recharge based on certain loads being transferred automatically back to their respective AC buses.

It was discovered during the 2013 NRG CDBI inspection (i.e., Inspection Report 50-325/2013-007 and 50-324/2013-007, dated December 6, 2013, ML13340A629) that certain non-safety loads, specifically the UPS lighting and communications inverters, were being credited in plant calculations as automatically transferring back to the AC buses. Because the specific loads are non-safety, their automatic transfer cannot be credited. If the UPS units and communications inverters fail to transfer to the AC supply, they will continue to be powered from the DC supply after the chargers are restored.

Under these conditions, the system load will exceed the charger capability, resulting in a continual discharge of the batteries. Recent analysis of the DC system loading with the UPS load remaining on the batteries without transferring to the AC source showed that voltage remained acceptable (i.e., greater than 107 V) for at least four hours. The revised calculation verified the analyzed duty cycle for the worst case loading remains bounded by the Maintenance Surveillance Test (MST) procedure test criteria, in regards to the batteries. The battery charger test criteria contained in the MST will be updated in accordance with the site's normal procedure update process based on the updated design bases. MST test history has shown the chargers each supply a minimum of 340 amps of the total DC load. The MST test data provides validation that this is well within the capability of each charger. Based on the above, the failure of the non-safety loads to transfer to the AC source when it becomes available would not affect the battery's ability to supply the required voltage to safety-related loads.

The BSEP Updated Final Safety Analysis Report (UFSAR), Section 8.3.2.1.2, discusses that the battery charges have been sized appropriately, taking into account worst case

BSEP 17-0078 Page 3 of 5 loading, to take the batteries from a minimum state (i.e., 105 V) to 95% of full charge in eight hours after an event. Further analysis of the worst case battery 1 B-2, demonstrated that sufficient charger capacity margin is available, if the UPS units are manually transferred to their AC source within the four hour time frame, for the battery to be recharged in eight hours as discussed in the BSEP UFSAR. Specifically, the analysis showed that with the chargers restored at one minute after the LOOP/LOCA event and with the UPS units remaining on the battery for a period of time not exceeding four hours, the battery chargers have adequate capacity to recharge the batteries within eight hours.

An Engineering Change (EC) has updated the battery load study calculation with a new post-LOOP/LOCA battery duty cycle based on the non-safety loads being transferred to their respective AC source, automatically or via manual operator action, within four hours instead of one minute based on increased loads remaining on battery power.

Administrative controls have been established to verify non-safety loads are transferred to AC sources within the four hour duty cycle. The Operations Standing Instruction (i.e., administrative controls) will be replaced by procedural requirements as part of an Abnormal Operating Procedure (AOP).

The difference between the increased duty load, in combination with the credited 300 amp chargers, and TS surveillance requirement of greater than or equal to 250 amps was not recognized until 2017. Based on this discovery, the electrical calculations were reviewed and it was determined that the testing requirements contained in TS SR 3.8.4.5 were not aligned with the design criteria contained in the electrical calculations. The 250 amp requirement contained in TS SR 3.8.4.5 is below the battery charger design continuous rating of 300 amps. The proposed TS change will bring the TS SR 3.8.4.5 criteria into alignment with the credited supplied amperage rating of the station battery chargers.

4.

Regulatory Evaluation 4.1.

Applicable Regulatory Requirements/Criteria 1 O CFR 50.90 provides direction to licensees seeking to revise their license to file an application for amendment with the NRG. The Technical Specifications constitutes Appendix A to the Operating License for each facility. This would require a license amendment to revise any portion of the Technical Specifications, such as requested here.

1 O CFR 50.36(c)(3) states that a facility's technical specification will include surveillance requirements, defined as "requirements relating to test, calibration, or inspection to assure that the necessary quality of systems and components is maintained, that facility operation will be within safety limits, and that the limiting conditions for operation will be met." The TS Bases qualify TS SR 3.8.4.5 requirements as derived from the design capacity of the chargers so that required battery charger supply can restore the batteries from a minimum charge state to fully charged under any load condition.

As stated in the NRC's "Safety Evaluation of the Brunswick Steam Electric Station Units 1 and 2," dated November 1973, BSEP meets the intent of the General Design Criterion (GDC), published in the Federal Register on May 21, 1971, as Appendix A to

BSEP 17-0078 Page 4 of 5 1 O CFR Part 50. The proposed change does not affect compliance with the intent of the GDCs. In particular, the intent of GDC 17, "Electric power systems," and GDC 18, "Inspection and testing of electrical power systems," will continue to be met.

Duke Energy has determined that the proposed change does not require an exemption or relief from regulatory requirements and does not affect conformance with any GDC as described in the BSEP UFSAR.

4.2.

No Significant Hazards Consideration Determination In accordance with 1 O CFR 50.90, "Application for amendment of license, construction permit, or early site permit," Duke Energy Progress, LLC (Duke Energy), requests an amendment to the Facility Operating License for Brunswick Steam Electric Plant (BSEP) to revise Surveillance Requirement (SR) 3.8.4.5 contained in Technical Specification (TS} 3.8.4, "DC Sources - Operating." Specifically, the TS change proposes to amend the required supplied amperage of the battery chargers contained within SR 3.8.4.5.

The proposed change has been reviewed considering applicable requirements of 1 O CFR 50.36, 1 O CFR 50, Appendix A, and other applicable NRC documents. Duke Energy has evaluated the proposed change to the battery charger amperage requirements of SRs 3.8.4.5 and determined that the change does not involve a Significant Hazards Consideration. In support of this determination, an evaluation of each of the three standards, set forth in 1 O CFR 50.92, is provided below.

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

Response: No The proposed change to the battery charger amperage requirements of SR 3.8.4.5 contained in TS 3.8.4 does not impact the physical function of plant structures, systems, or components (SSC) or the manner in which SCCs perform their design function. The proposed change does not authorize the addition of any new plant equipment or systems, nor does it alter the assumptions of any accident analyses.

The DC electrical power system, including the battery chargers, is not an initiator of any accident sequence ana~zed in the Updated Final Safety Analysis Report.

Rather, the DC electrical power system supports operation of equipment used to mitigate accidents. Specifically, the purpose of the battery chargers is to continuously maintain their respective battery in a charged standby condition while providing power to the system loads. The proposed change does not adversely affect accident initiators or precursors, nor does it alter the desig.n assumptions, conditions, and configuration or the manner in which the plant is operated and maintained.

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

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

Response: No

BSEP 17-0078 Page 5 of 5 The proposed change to the battery charger amperage requirements of SR 3.8.4.5 contained in TS 3.8.4 does not require any modification to the plant or change equipment operation. The proposed change will not introduce failure modes that could result in a new accident, and the change does not alter assumptions made in the safety analysis. Performance of battery testing is not a precursor to any accident previously evaluated. The proposed change will not alter the design configuration, or method of operation of plant equipment beyond its normal functional capabilities. The proposed change does not create any new credible failure mechanisms, malfunctions, or accident initiators.

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

3) Does the proposed amendment involve a significant reduction in a margin of safety?

Response: No The proposed change to the battery charger amperage requirements of SR 3.8.4.5 contained in TS 3.8.4 does not alter or exceed a design basis or safety limit. There is no change being made to safety analysis assumptions or the safety limits that would adversely affect plant safety as a result of the proposed change. Margins of safety are unaffected by the proposed change and the applicable requirements of 1 O CFR 50.36(c)(2)(ii) and 1 O CFR 50, Appendix A will continue to be met.

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

4.3.

Conclusions In conclusion, and based on the considerations discussed above, the proposed change does not involve a significant hazards consideration under the standards set forth in 1 O CFR 50.92(c), and, accordingly, a finding of "no significant hazards consideration" is justified. Also, there is a reasonable assurance that the health and safety of the public will not be impacted by the proposed change to revise the battery charger amperage requirements of SR 3.8.4.5 contained within TS 3.8.4. The change will be in compliance with the NRC regulations, and the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.

5.

Environmental Consideration The proposed amendment would change a requirement with respect to installed facility components located within the restricted area of the plant as defined in 1 O CFR Part 20.

However, the proposed amendment does not involve: (i) a significant hazards consideration, (ii) a significant change in the types or significant increase in the amounts of any effluent that may be released offsite, or (iii) a significant increase in individual or cumulative occupational radiation exposure. Accordingly, the proposed amendment meets the eligibility criterion for categorical exclusion set forth in 1 O CFR 51.22(c)(9). Therefore, pursuant to 1 O CFR 51.22(b),

no environmental impact statement or environmental assessment need be prepared in connection with the proposed amendment.

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Renewed Facility Operating License Nos. DPR-71 and DPR-62 Docket Nos. 50-325 and 50-324 Request for License Amendment - DC Sources - Operating Surveillance Requirements (SRs) 3.8.4.5 Proposed Unit 1 BSEP TS (Markups)

BSEP 17-0078

DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SR 3.8.4.4 SR 3.8.4.5 SR 3.8.4.6 Brunswick Unit 1 SURVEILLANCE Remove visible corrosion and verify battery cell to cell and terminal connections are coated with anti-corrosion material.

Verify each required battery charger supplies

~ 2-aQ amps at ~ 135 V for ~ 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

---

NOTES--------------------

1.

The modified performance discharge test in SR 3.8.4.7 may be performed in lieu of the service test in SR 3.8.4.6 once per 60 months.

2.

This Surveillance shall not be performed in MODE 1 or 2 for the Unit 1 DC electrical power subsystems. However, credit may be taken for unplanned events that satisfy this SR.

3.

A single test at the specified Frequency will satisfy this Surveillance for both units.

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

3.8-25 FREQUENCY In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program (continued)

Amendment No. m I

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Renewed Facility Operating License Nos. DPR-71 and DPR-62 Docket Nos. 50-325 and 50-324 Request for License Amendment - DC Sources - Operating Surveillance Requirements (SRs) 3.8.4.5 Proposed Unit 2 BSEP TS (Markups)

BSEP 17-0078

300 DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SR 3.8.4.4 SR 3.8.4.5 SR 3.8.4.6 Brunswick Unit 2 SURVEILLANCE Remove visible corrosion and verify battery cell to cell and terminal connections are coated with anti-corrosion material.

Verify each required battery charger supplies

2W amps at ~ 135 V for ~ 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

---

NOTES-----------------------

1.

The modified performance discharge test in SR 3.8.4.7 may be performed in lieu of the service test in SR 3.8.4.6 once per 60 months.

2.

This Surveillance shall not be performed in MODE 1 or 2 for the Unit 2 DC electrical power subsystems. However, credit may be taken for unplanned events that satisfy this SR.

3.

A single test at the specified Frequency will satisfy this Surveillance for both units.

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

3.8-25 FREQUENCY In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program (continued)

Amendment No. aG4 I

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Renewed Facility Operating License Nos. DPR-71 and DPR-62 Docket Nos. 50-325 and 50-324 Request for License Amendment - DC Sources - Operating Surveillance Requirements (SRs) 3.8.4.5 Proposed Unit 1 BSEP TS (Retyped Pages)

BSEP 17-0078

DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SR 3.8.4.4 SR 3.8.4.5 SR 3.8.4.6 Brunswick Unit 1 SURVEILLANCE Remove visible corrosion and verify battery cell to cell and terminal connections are coated with anti-corrosion material.

Verify each required battery charger supplies

~ 300 amps at ~ 135 V for ~ 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

---

NO TES-------------------------------

1.

The modified performance discharge test in SR 3.8.4.7 may be performed in lieu of the service test in SR 3.8.4.6 once per 60 months.

2.

This Surveillance shall not be performed in MODE 1 or 2 for the Unit 1 DC electrical power subsystems. However, credit may be taken for unplanned events that satisfy this SR.

3.

A single test at the specified Frequency will satisfy this Surveillance for both units.

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

3.8-25 FREQUENCY In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program (continued)

Amendment No.

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Renewed Facility Operating License Nos. DPR-71 and DPR-62 Docket Nos. 50-325 and 50-324 Request for License Amendment - DC Sources - Operating Surveillance Requirements (SRs) 3.8.4.5 Proposed Unit 2 BSEP TS (Retyped Pages)

BSEP 17-0078

DC Sources-Operating 3.8.4 SURVEILLANCE REQUIREMENTS (continued)

SR 3.8.4.4 SR 3.8.4.5 SR 3.8.4.6 Brunswick Unit 2 SURVEILLANCE Remove visible corrosion and verify battery cell to cell and terminal connections are coated with anti-corrosion material.

Verify each required battery charger supplies

~ 300 amps at ~ 135 V for ~ 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

---

~~---~-~-~----NOl"ES-~-~-~-~-~--------------

1.

"The modified performance discharge test in SR 3.8.4.7 may be performed in lieu of the service test in SR 3.8.4.6 once per 60 months.

2.

This Surveillance shall not be performed in MODE 1 or 2 for the Unit 2 DC electrical power subsystems. However, credit may be taken for unplanned events that satisfy this SR.

3.

A single test at the specified Frequency will satisfy this Surveillance for both units.

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

3.8-25 FREQUENCY In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program In accordance with the Surveillance Frequency Control Program (continue9)

Amendment No.

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Renewed Facility Operating License Nos. DPR-71 and DPR-62 Docket Nos. 50-325 and 50-324 Request for License Amendment - DC Sources - Operating Surveillance Requirements (SRs) 3.8.4.5 BSEP 17-0078 BSEP Calculation BNP-E-6.079, Revision 6, "125 V DC Battery Charger Sizing Calculation" (Enclosure 6 contains six pages)

(_~DUKE

~ ENERGY.

Facility Code :

Applicable Facilities :

Document Number :

Document Revision Number :

Document EC Number :

Change Reason :

Document Title :

Field, Rex S.

Kuffour, Edward 0.

Anderson, Jon J.

Notes:

BNP BNP BNP-E-6.079 006 AR02096967 UNIT 1 & 2 - 125 V DC BATTERY CHARGER SIZING CALCULATION Preparer 6/27/2017 Design Verifier 6/27/2017 Approver 6/27/2017

Unit 1 & 2 - 125 VDC Battery Charger Sizing Calculation Calculation Number:

BNP-E-6.079 Rev#

6 System: 5230, 5240, 5245 DSD List: 0 Yes [8J No

[BNP, HNP, RNP] Sub-Type: ELE Microfiche Attachment List:

D Yes [8J No

~------------

Quality Level A

~------------

DAii

[8J BNP Unit

__ 1 & 2 __ _ 0 CNS Unit D ONS Unit D LNP Unit 0 MNS Unit 0 WLS Unit D General Office D Keowee Hydro Station Originated By Design Verification Review By Signature Signature E-sign E-sign Verification Method 1 [8J 2 D 3 D Other D Printed Name Printed Name Rex S Field Ed Kuffour Date Date E-date E-date Priority E: [8J Yes D No D HNP Unit D RNP Unit D HAR Unit Approved By Signature E-sign Printed Name Jon Anderson Date E-date D YES [8J NO Check Box for Multiple Originators or Design Verifiers (see next page)

For Vendor Calculations:

Vendor: N/A Vendor Document#: N/A Owners Review By: N/A Date: N/A Approval By: N/A Date: N/A

3.1.2.3 LOCA/LOOP Calculation BNP-E-6.079 Revision 6 Page 8 The battery load profile resulting from a coincident LOCA/LOOP DBE is defined as a four (4) hour discharge profile in the battery load study (ref.

2.3). Aging and temperature derating factors will be used to determine the minimum allowable state of battery charge. This profile consists of two (2) discharge periods. The first period is one (1) minute in duration in which time zero is the initiation of a OBA LOCA/LOOP. All DC loads are fed from the batteries for the first 10 seconds (until the respective EDGs start and close the output breaker. At that point, the battery chargers are fed by the EOG and assume 300A of the DC load. Any remaining load is fed by the batteries.

The maximum uncorrected discharge at the one (1) minute mark is 10.32 Ah and at the four (4) hour mark is 688.66 Ah (ref 2.3; battery 1 B-2 Att D pg 121/322).

The minimum voltage requirement for the first minute is 107Vdc (1.78 Vpc).

From ref 2.3 (Att H), the one (1) minute discharge is limited to 1020 A.

The average current during the first minute is 10.32 Ah I 1 min

• 60 min =

619.2 A.

The allowable one (1) minute discharge is:

1020 A I (1.11)(1.25) = 735.14 A and, the maximum capacity discharged over a one (1) minute period, in ampere-hours is:

735.14 A* 1 min/ 60 min= 12.25 Ah For the initial minute, (ref 2.3; Att G, Table 1) demonstrates that the actual value of (uncorrected) ampere-hours discharged under this scenario (LOCA/LOOP) is enveloped by the above. The MST one (1) minute test value of 725A is also bounded by this maximum value of 735A.

The basis for the allowable time to recharge the batteries is to 95% of their capacity is not specifically identified for this scenario. Therefore, it will be considered to be approximately eight (8) hours (ref UFSAR 8.3.2.1.2).

For a four (4) hour duration, the discharge is limited to 244 A [976 Ah] (ref 2.3 Att H pg 4). Four (4) hours is chosen because from ref 2.3 analysis, this is the maximum amount of time the DC load (specifically B division and battery 2A-1) can be continuously energized without operator action

Calculation BNP-E-6.079 Revision 6 Page 9 to decrease the load and begin recharging the batteries. The remainder of A division batteries would not require operator action to prevent the batteries from continually discharging.

The allowable discharge is:

Eqn (6) 244 A I (1.11 )(1.25) = 175.86 A This is enveloped by the MST test value of 200A from 30 minutes to four (4) hours.

From on the worst case battery 1B-2 as noted in BNP-E-6.120 R10 Attachment D, depleted amp-hour totals and battery amps (negative values indicating recharging) were taken at the four (4) hour time mark to determine the amount of time to recharge. The values are corrected for a battery charger voltage of 135V as opposed to a battery voltage of 125 V as calculated in ref 2.3 (Attachment B1) and noted below in Table A.

Battery Voltages After Restoration of the Battery Chargers IEEE 485-1983 requires that the batteries be capable of supplying load to the DC system when the DC load exceeds the output capability of the system battery chargers. EC 93932 included the effects of battery voltage due to charger output being less than the load of the DC system. EC 300753 and 407321 evaluated battery voltages and loading after the first minute in situations when the DC loading remained greater than the battery charger amperage output limit (300A).

Analysis in BNP-E-6.120 R10 determined loading after the first minute is greater than 300A for the B batteries and battery 2A-1, therefore, these batteries are continually depleting after the first minute rather than recharging. For the B batteries this is due primarily to the L TG/COMM UPS units which contribute approximately 185-195A. Battery 2A-1 loading is slightly above 300A due to miscellaneous loads. A reduction in loading will permit these batteries to be recharged.

Based on UFSAR, the batteries must be able to recharge within eight (8) hours for any load condition.

Based on the worst case battery 1 B-2, depleted amp hour totals and battery amps (negative values indicating recharging) were taken at the four (4) hour time mark (Attachment D page 121 I 322) to determine the amount of time to recharge.

This table indicates if the L TG/COMM UPS' units are transferred to their appropriate AC source within four (4) hours, the B batteries are capable of recharging within eight (8) hours.

TABLE A Load (r)

Load (k)

Battery Amps Amps (A)

(8)

(C) 1B-2 101.34 23.54

=(B)*135/125

=(C)*125/135 Calculation BNP-E-6.079 Revision 6 Page 10 Load (i)

Load (t)

Amps Amps (D)

(E)=(B)+(C)+(D) 73.19 198.07

=(D)

Adjusted Load (t) 1 B-2 (adjusted) 109.45 21.80 73.19 204.43 Battery Adjusted Loading = 204.43 - 198.07 = 6.36 TABLE B Charging Add'I Isolate UPS 18-2 Amps after Battery after this no.

Depleted UPS Adjusted Time to of hours Ah rs 10%

Offline Loading Recharge (A)

(B)

(C)

(D)

(E)

(F)

Ref Att D pg Ref Att D pg F

120 I 322 C=B*1.1 121 I 322 Table A

=CI (D + E) 2 350.16 385.18

-105.73 6.36 3.88 3

521.84 574.02

-105.73 6.36 5.78 4

694.44 763.88

-105.73 6.36 7.69 If the batteries were depleted to a maximum value based on four (4) hours from ref 2.3 (Att H), the maximum amount of DC load the battery chargers could feed is:

Eqn (7)

Ac= 300- l.l x244*4AH = 165.8A 8.

The minimum amount of current to recharge the batteries in approximately eight (8) hours would be:

Eqn (8) 300 A-165.8 A= 134.2 A However, as noted in Table B [from ref 2.3 analysis], at four (4) hours, the recharge rate is 106. 78 A. Therefore, the maximum battery charger rate to feed a DC load while recharging the batteries is:

Eqn (9) 300 Amps - (105.73 - 6.27) A= 200.63 A

Calculation BNP-E-6.079 Revision 6 Page 11 This is greater than the value in Eqn (7 (200.63 >165.8 A) because the batteries have not been depleted to their maximum value within four (4) hours. Also, the battery recharge rate is less than the maximum allowed (106. 78 < 134.2 A) 3.1.2.4 Reg. Guide 1.155 Station Black Out (SBO)

The Station Blackout Coping Report (Ref. 2.30) establishes that the BSEP plant is required to maintain a four (4) hour coping duration during a Station Black Out event. However, "AOP-36.2 defines a means to cross tie AC power from the non-blacked out Unit to the blacked out Unit battery chargers within one (1) hour rather than providing a list of DC loads to be stripped". Based on a one (1) hour cross-tie capability, the aging and temperature derated, one (1) hour discharge state of the battery is used.

The one ( 1) hour rating for the battery to accomplish the 1. 783 V /cell requirement established in Ref. 2.29 is 553 A. This is based off of a linear interpolation between the 1.78 V/Cell and 1.81 V/Cell one (1) hour ratings (Ref. 2.15).

1.78-1.81=1.78-1.783 => X = 553A 558-510 558-X Therefore, the allowable discharge capacity is:

1 Hour x 553 A I (1.11 )(1.25) = 398.56 Ah Table 1 of Attachment G to ref 2.3 demonstrates that the actual value of (uncorrected) ampere-hours discharged under this scenario (SBO) is enveloped by the above.

The basis for the allowable time to recharge.the batteries to 95% of their capacity is not specifically identified for this scenario. Therefore, it will be considered to be eight (8) hours, per bases 3.2.1.g.

Therefore, the allowable continuous ampere load on the DC distribution system while.recharging is:

Ac= 300- I.Ix 398.56 AH = 245.2 A 8

Brunswick Steam Electric Plant, Unit Nos. 1 and 2 Renewed Facility Operating License Nos. DPR-71 and DPR-62 Docket Nos. 50-325 and 50-324 Request for License Amendment - DC Sources - Operating Surveillance Requirements (SRs) 3.8.4.5 BSEP 17-0078 BSEP Calculation BNP-E-6.120, Revision 10, "DC System Battery Load Study" (Enclosure 7 contains seventeen pages)

J_~DUKE

~ ENERGY.

Facility Code :

Applicable Facilities :

Document Number :

Document Revision Number :

Document EC Number :

Change Reason :

Document Title :

Field, Rex Kuffour, Edward 0.

Anderson, Jon J.

Notes:

BNP BNP BNP-E-6.120 010 EC000029647... EC0000297Zll.ECOOOC129956l.EC00002995M.ECOOOOJCIOll7l.EC0000407321:EC0000299514.EC0000299437.fCOOl>040IM9".EC00004CW218.EC00004013'0 125/250 voe SYSTEM BATTERY LOAD STUDY Preparer 6/27/2017 Design Verifier 6/27/2017 Approver 6/27/2017

125/250 voe SYSTEM BATTERY LOAD STUDY Calculation Number:

BNP-E-6.120 Rev#

10 System:

5230, 5245 DSD List:

D Yes ~No

[BNP, HNP, RNP] Sub-Type:

ELE Microfiche Attachment List:

D Yes ~No

~----------~

Quality Level A

---

~

DAii

~ BNP Unit __ 1 & 2. __ _ 0 CNS Unit D ONS Unit D LNP Unit D MNS Unit D WLS Unit D General Office D Keowee Hydro Station Originated By Design Verification Review By Signature Signature E-sign E-sign Verification Method 1 ~ 2 D 3 D Other D Printed Name Printed Name Rex S Field Ed Kuffour Date Date E-date E-date Priority E:

~Yes D No D HNP Unit D RNP Unit D HAR Unit Approved By Signature E-sign Printed Name Jon Anderson Date E-date D YES ~ NO Check Box for Multiple Originators or Design Verifiers (see next page)

For Vendor Calculations:

Vendor: N/A Vendor Document#: NIA Owners Review By: N/A Date: N/A Approval By: N/A Date: N/A

3.0 BODY OF CALCULATION 3.1 Discussion/Calculation 3.1.1 125/250 VDC Distribution System Description Calculation BNP-E-6.120 Revision 7 Page5 Each division of the Class 1 E 125/250V DC system is powered by two (2) 125V DC batteries, in series, and their respective battery chargers, as depicted in Figures 1 & 2.

The battery chargers are fed from the Class 1 E onsite AC distribution system and normally supply power to all DC loads while maintaining the batteries in a fully charged state. Charger output is interrupted upon a loss of offsite power (LOOP) and is restored when the Emergency Diesel Generators re-energize the Emergency AC buses. During this period the batteries must be able to supply their load without charger support.

The 125/250V DC battery cells are GNB type NCN-17. Their discharge characteristics are included in Attachment H. Each 125V battery consists of 60 cells connected in series.

There are two 125V DC batteries in each division of each unit. The two batteries in each division are connected in series with their connection point (labeled NP), forming the common leg of the 125/250V DC system. Buses connected between the common leg and the remaining leg of either battery, i.e., P-NP or NP-N, receive 125V nominal. Buses connected between the outer legs of the two batteries (i.e., P-N) receive 250V nominal.

As shown in Figures 1 & 2, many panels in the DC distribution system are capable of being supplied from two power sources, the normal source and the alternate source.

These alternate feeds will be taken into consideration in this study. Voltage calculations are performed in accordance with the recommendations of Reference 2.3.

3.1.2 Battery Loading Scenarios Battery capacity must be evaluated for the following operating/loading scenarios:

1.

Design Basis Event (DBE) - LOCA with LOOP Large Break LOCA with LOOP Small Break LOCA with LOOP

2.

• Station Blackout (SBO)

3.

Appendix R Fire Safety Analysis Safe Shutdown

p NP N

(-)

GK1 Gl6 GIB (CB).

DP3A DP18 BATI 1A-2 I f GJ& I I GJ01 (OGBI DP1A DPSA DP9A (SWVD)

(SWYD)

DP38 (CB) p GLBj I GKB:

I GK& I I

GLDI I

GMO NP N

GM21 I GM3 Ml

~

BATI BATI 1B-1 1 I 1B-2 FIGURE 1 UNIT 1125/250VDC DISTRIBUTION SYSTEM G.J.4 Gl71 (CB)

DP11A DP 118 GK7 SWITCHBOARD 1A Gl9 GJ3 (SWYDI GJ2 (RB)

CHARGER 1A-1 (TB)

MCC1CA

~

GJO' I I

I I

I I I

I I

I I

I I

I I

I f:

DP7A:

1XDA 1TDA 11DP17 DP3A8 (CB)

I I

I I

I I

I DP78 I (SWVOI RBEMRG LIGHTING Gl.71 I Gt(g SWITCHBOARD 1 B 1XD8 1TD8 (RB)

Gl.3 (TB)

Gl2 MCC1CB MCC 1XB

'---v--'

SWBO 28(+)

SWBD 2A(+)

~

I I (R'MJ)

I I I I I

I I I I I I

I I I I I I

I TBEMRG LIGHTING I

I I

I GL1 1 I GLB GM11 I

GM4 13711 CHARGER 18-2 1 L-MCC1CB l..--- MCC 1XB CHARGER 1A-2 GJS Gl5 Gl.9 Calculation BNP-E-6.120 Revision 5 Page6 SWBD2B

~

I I

I I

I I

I I

I I

I GJB I NORMAL FEED ALTERNATE FEED

p NP N

p NP N

FIGURE 2 Calculation BNP-E-6.120 Revision 5 Page?

UNIT 2 125/250VDC DISTRIBUTION SYSTEM BATT 11~ I BATT 2A-1 2A-2

!:U

(*)

~**

Gl<2

~I I JI J~

j I GJO: I I I GJ* I I Gl71 I I I (CO)

(0081 (CB)

DP4A DP2A I

DP12A I

tr-I (TO)

(SWID) 1 DP10A DP6A DP28 DP48

~~

(008)

(CB)

(CB)

I WTSYS I CONTPNL I

GLS Gl<ll I

Ol.D GMO Ol.4 C><1 I

I I

I I

GM2 GM3

-0

(*)

BATT BATT Uc*>

2B-1 ITT>

2B-2

~

CHARGER IL.I 2A-1

+

1£1 CHARGER

+

2A-2 SWITCHBOARD 2A GKO I I GKJ 11 aoo I I M l I I G.121 I I GJ1 1 I

~

IRlll (TO) l'MiSEI I DP 17 DPBA' I I

2XDA 2TDA DP4A8 I I'

-r-I I

S~(<) sweo 1A<'l (CB)

I I

I I

I I

2XDB 2TDB I I DP88 1 :

1 : DP 13 TG EBOP (SWID)

(Rll)

(TB)

........ )

IRWBEMRG I LIGHTING I

TBEMRG I LIGHTING 00..7 GK9 GLJ Gl.2 SWITCHBOARD 2B GMI GM4 CHARGER

+

+

CHARGER 28-1

!!JI.

!!JI.

28-2 MCC2CB I

I MCC2CB MCC2XD ----J

'---- MCC2XD 11°"

sweo 1e SWB01B

~,,...,._.,

I I U2LTG U1 LTG STD8Y

&COMM

&COMM p~

UPS UPS I

I I

I I

I I

I I

I I

Gt.*

au DJI I -

NORMAL FEED I

- - -

• ALTERNATE FEED

3.2 Bases and Assumptions 3.2.1 Battery Loading for a Design Basis Event (DBE)

Calculation BNP-E-6.120 Revision 10 Page8 3.2.1.1 The DBE for which the batteries are evaluated is assumed to be a simultaneous loss of coolant accident (LOCA), coincident with a loss of offsite power (LOOP) and a single equipment failure (Reference 2.18, Section 2.1.1.1 ).

For a design basis event, the enveloping single failure is assumed to be the complete loss of one (1) DC division. The remaining DC division must be capable of supplying power to the ESF loads required for accident mitigation, as well as to BOP loads that are connected to the 125/250 VDC system. For the available DC division, AC power to the battery chargers will be restored by the diesel generator in approximately 10 sec from LOOP initiation. However, because the first minute peak loading could exceed the maximum output of the battery charger, this analysis is based on the batteries not having charger support for the entire first minute (Reference 2.18, Section 4.2.3.11 ). In addition, DC loading after the first minute (the "B" batteries) exceeds the battery charger rating of 300A. Load greater than 300A is carried by the respective battery; however, the loading will continue to deplete.

EC 407321 determined this loading condition could last approximately four (4) hours before operation action would require reducing the DC load sufficiently (transfer to an ac source or secure L TG/COMM UPS Units) to permit the battery chargers to recharge their respective battery. Therefore, the battery duty cycle for the DBE event is considered four (4) hours.

During a LOCA event, the High Pressure Coolant Injection (HPCI) and Reactor Core Isolation Cooling (RCIC) systems, supported by Division I and Division II batteries, respectively, will start as a result of high drywell pressure and/or reactor pressure vessel Low Level 2 (LL2) signal. Their operation is dependent on the type of LOCA event. This study examines two types of LOCA events for battery loading:

a) Large Break LOCA - pipe break which results in a loss of reactor coolant inventory that is more than the make-up capability of the HPCI system. In this case, the HPCI system starts first as a result of a high drywell pressure signal, followed by the subsequent start of the RCIC system, when the reactor vessel water level 2 (LL2) is reached.

b) Small Break LOCA - pipe br~ak which results in a loss of reactor coolant inventory that is less than the make-up capability of HPCI. In this case, it is assumed that HPCI will start on high drywell pressure signal and will maintain the reactor vessel water level above LL2. Therefore, the RCIC system will not be called upon to start. In the case of a loss of the Division I batteries which feeds the HPCI system, the HPCI System flow will maintain the reactor vessel water level between LL2 and "High Level" (Reference 2.55).

HPCI and RCIC pumps are assumed to start and secure once during the first minute and then run continuously which is a more conservative loading than system cycling.

Therefore, no system cycling is considered. For a conservative analysis (i.e., maximum number of DC MOV motor starts), both systems' MOVs are assumed to start and shutdown due to low steam pressure during the first minute.

Calculation BNP-E-6.120 Revision 10 Page9 For additional conservatism, and to minimize the need for separate databases, only one LOCA/LOOP analysis will be performed which envelopes both the small break LOCA and the large break LOCA scenarios.

3.2.1.2 This calculation is based on the analyzed DBE occurring on one (1) Unit only, with the concurrent, orderly shutdown of the other unit.

Only the loads associated with these events, or those that could be transferred from the opposite unit (loads which have an alternate power source from the other unit), are applied to the batteries of the DBE unit.

3.2.1.3 For conservatism, all loads on the non-DBE unit which have alternate power supplies from the DBE unit batteries are assumed to be powered by the DBE unit batteries (Reference subsection 3.2.1.4 for the application of this assumption to the plant Uninterruptible Power Supplies and Lighting and Communication Inverters).

3.2.1.4 The plant vital power Uninterruptible Power Supply (UPS) distribution panels are normally aligned to the Primary Power Conversion Unit 1 (2)A, which is fed from the Division I Emergency AC power supply, and backed-up by Division I batteries 1(2)A-1 and 1(2)A-2.

If the primary unit fails, the standby unit can be manually placed in service (Reference 2.14 and 2.21 ). The Standby Power Conversion Unit 1 (2)B is aligned to the Division II batteries 1(2)B-1and1(2)B-2 (Reference 2.14 and 2.21).

When determining the first minute LOCA/LOOP loading for the Division I and II batteries, the Primary Power Conversion Unit 1A is assumed to be fed from the Division I batteries; however, Tech Spec 3.8.7.2 requires verification that no combination of more than two (2) power conversion modules (consisting of either two (2) lighting inverters or one (1) lighting inverter and one (1) plant UPS unit) are aligned to Division II bus B.

Based on this criteria, the two (2) Lighting and Communications Inverters represent the greatest load of any two (2) inverters and are lined up to the Division II bus B batteries. In accordance with Reference 2.2, Section 3.8.7.2, Division II shall be determined to be operable at least once per seven (7) days.

3.2.1.5 This analysis is based on a complete failure or unavailability of one (1) DC Division. All loads that could be transferred from the failed division to the division under review are assumed to be transferred.

3.2.1.6 In accordance with Reference 2.3, "if a discrete sequence of momentary loads occurring within the same one (1) minute period can be established, the load for the one (1) minute period shall be assumed to be the maximum current at any instant". This analysis credits the discrete operation of momentary loads within the first minute LOCA/LOOP profile.

3.2.1. 7 No manual power circuit breaker or motor-operated disconnect switch operations are assumed to occur in the switchyard due to the LOOP or within the first sixty (60) seconds of the DBE. There are no undervoltage relaying schemes which would cause multiple power circuit breakers to trip due to loss of voltage in the switchyard. Tripping of multiple power circuit breakers could occur either by over-current conditions or if one of the Unit breakers feeding the main transformers has a failure to trip. However, this will not affect the battery load profile since the battery chargers would still have ac power until the last of the power circuit breakers has tripped. Additionally, if the power circuit breakers were to

Calculation BNP-E-6.120 Revision 10 Page 10 trip, there would not be any additional load drawn from the batteries in the form of spring charging motors.

Therefore, only the normal, continuous loading associated with this equipment is considered in the load profile.

3.2.1.8 The circuit breakers for motor loads powered from 4 kV Buses C and D trip on undervoltage detection via the actuation of relay 27/59S (and 27X, 27Y) at 5-6 sec following a LOOP. The same breakers are also equipped with LOCA load shed (LLS) and unit trip load shed (UTLS) circuitry that, when enabled, will trip selected 4 kV motor loads upon receipt of a LOCA signal or a unit trip signal. Keyed selector switches are installed on the affected breaker cubicle doors to enable or disable the LLS and/or UTLS feature for each specific load, based on the Eastern Transmission Area grid loading and voltage conditions. Breakers whose UTLS feature is enabled will trip at t=O (i.e., prior to the 5-6 sec undervoltage detection). Breakers whose LLS feature is enabled will trip when the LOCA signal is generated (LL3). For maximum coincident battery loading, 4kV bus C and D load shedding is assumed to occur at t=5 sec (see Table 3-12).

3.2.1.9 Per Attachment 2 of Reference 2.34, during a design basis LOCA event, reactor vessel Low Level 2 (LL2) and Low Level 3 (LL3) can be reached as early as 1.8 sec and 4.5 sec respectively.

3.2.1.10 Per Reference 2.33, during a design basis LOCA event, drywell pressure rises to the "high" setpoint level almost instantaneously (<< 1 sec).

3.2.1.11 4160V breakers typically trip within three (3) - five (5) cycles. (Ref 2.49). Six (6) cycles is assumed for conservatism. Since dcPRO 3.0 analyzes in one (1) second intervals, the energy dissipated by a trip coil is assumed to be 10% (6 cycles I 60 cycles) of rated amperage over a one (1) second interval.

The breakers are not assumed to trip simultaneously but dispersed (normal distribution) within a one (1) second interval.

Therefore, the cumulative effect is 10% of each individual contributing item.

3.2.1.12 4160V breaker spring charging motors have an inrush of 6 to 8 times normal operating current (1 OA) (Ref. 2.50). This inrush has been measured from testing to be 60A for 0.050 seconds in duration (peak at 0.025 second) (Attachment R). The current lowers to 20A, rises to 25A within 0.50 seconds and lowers to 1 OA for the remainder of the operation. The entire cycle is 1.6 seconds. The published value from ITE for the Type HK medium voltage circuit breakers is two (2) seconds for spring charging time. The energy dissipated over the first second as noted in Attachment R is 12.9 A-s.

The energy dissipated over the remaining 0.6 seconds is 6 A-s. Breakers are not assumed to close and recharge sim.ultaneously but dispersed within a one (1) second interyal. A total of two (2) seconds per closing operation is used based on vendor information and testing noted in Attachment R. An additional 20% is added to the energy dissipated for conservatism.

The first second of operation to the batteries is calculated at 15.4 A-s and the remainder of operation (over the 2"d second) is 7.2 A-s. Spring charging motor required voltage range is95-125 Vdc (ref 2.74). This is below the battery Vmin of 107 Vdc.

3.2.1.13 The DG field flash is modeled based on testing that was performed 07 /22/03 and evaluation conducted 10/24/13. The data and evaluation are in Attachment M. Testing

Calculation BNP-E-6.120 Revision 10 Page 11 indicated the DG field flash can take up to five (5) seconds (modeled 5 to 10 seconds);

however, analysis determined that the field flash from the batteries is typically three (3) seconds (modeled from 7 to 9 seconds) because the field flash from self-excitation will eventually exceed the field flash from the batteries. At that point, the field flash current from the batteries is isolated (blocking diode) and the diesel begins self-excitation. For modeling purposes, all four (4) diesels are presumed to flash for five (5) seconds.

3.2.1.14 TG EBOP inrush is modeled based on trace information from Ref 2.51 and estimated no more than two (2) seconds. The data and evaluation are in Attachment N.

3.2.1.15 The RFPT EOP inrush time is assumed no greater than two (2) second. From Ref 2.67, the motor is rated at 7.5Hp, 230V, 85% efficiency with a bHp of 6.5Hp (normal operating current of 24.8A). The inrush is estimated at 2.67

• FLA which is based on data from Ref 2.28.

3.2.1.16 NCR 630621 identified that BNP was crediting voltages in excess of what was verified during battery capacity performance testing. EC 94834 and EC 95835 determined that based on the maximum instantaneous demand of approximately 700 A minimum a voltage of 107Vdc could occur at minimum battery temperatures and at the end of battery life. Therefore, the battery voltages for the LOCA/LOOP analyses were set at 107Vdc for both Unit 1 and 2.

This has been corrected and IEEE 485 methodology is used for analysis. Battery voltages are no longer set at 107V de*

For the purposes of the LOCNLOOP evaluation, the GNB type batteries are noted as"CON 17", in 'Nhich the output of the battery is fixed at 1.783 Vpc (107Vdc). CON 17 is a dummy battery cell used with the dcPRO software to simulate the results of the battery discharge test. It is composed of 17 plates (same number of plates as the actual NCN 17cell) *.*1hose characteristics have been set to yield a constant output voltage of 1.783V(107V) battery terminal 1Joltage) irrespecti1Je of the battery load during the one minute LOCNLOOP duty cycle. This v1as done to match the minimum battery voltage recorded during the first minute of the battery capacity discharge test.

3.2.2 Battery Loading for Station Blackout 3.2.2.1 In ac~ordance with Reference 2.23, the BNP SBO coping dwation is 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. However, in order to service the loads required for coping, for this period of time, the station batteries will require charger support. To accomplish this, the normally open crosstie from the non-blacked out unit will be closed within one (1) hour following the inception of the event, restoring the blacked out unit's battery chargers, thereby extending the capacity of the batteries. Consequently, this analysis established a one (1) hour SBO load profile for each of the 125/250V batteries.

3.2.2.2 With the exception of HPCl/RCIC isolation valve closures that occur due to insufficient steam supply pressure, all SBO unit specific LOCA loads considered to be energized in the LOCA/LOOP scenario are also considered to be energized for the SBO event.

Additionally, loads in the LOCA/LOOP scenario that transferred to the AC source at 10 sec upon the successful starting of the Emergency Diesel Generators, including the UPS

DUKB SNERGY BRUNSNICK MJCL1!llR PLANT UNITS l

& 2 125/250 VDC DISTRIBUTION SYSTEM STUDY SOFTtiARB USED: dcPRO 3. 0 BY CTA VOLTAGE/ LOAD FLOW CALCULATION REPORT CONDITION l: LOCA WI771 LOOP (CONTINUEDJ Calculation BNP-E-6.120 Revision 10 Attachment D Page 121 of 322

• • • • • • • a**********D*********=***=********************=***==***=**=***=*************=****=*=***=*******=*=*=============*====~=*=a*sa~a=:uaa=====***=3*=*=**=

BUS: (#41 BA'.ITBRY JB-2 (CONTINUlWJ INITIAL BATTERY STATE: FULLY CHARGHD DUTY CYCLE TIHE:

5:00:00 BATTERY MANUFACTURER: GNB CBLL TYPE: NCN-11 MINIMUM ELECTROLYTE TEMPERATURE:

60. 0°F TEMP CORRECTION FACTOR: l.llO

• a* SBGHBNT ****

FR<>>I TO

• • • =a**

2150:00 2:55:00 3:00:00 3:05:00 3:10:00 3:15:00 3:20:00 3:25100 3:30:00 3:35:00 3:40:00 3t45:00 3150:00 3:55:00 4:00:00 4:05:00 4il0:00 4:15:00 4:20:00 4:25:00 4:30:00 4:35:00 4:40:00 4:45:00 4:50100 4:55:00 2:55100 3:00:00 3:05:00 3:10:00 3:15:00 3:20:00 3:25:00 3130:00 3:35100 3:40:00 3:45:00 3t50100 3:55:00 4:00:00 4:05:00 4:10:00 4:15:00 4:20:00 4:25:00 4:30:00 4:35:00 4140:00 4:45:00 4:50:00 4155:00 5:00:00 BATTERY AMPS m:sm:m**=

123.88 123. 93 123.97 124.03 124.08 124.l.J 124.20 124.21 124.35 124.43 124.53 124. 63 124. 75 124.81

-105. 75

• 105. 13

-105. 71

-105.69

-105. 67

-105.65

• 105.63

-105.62

-105.60

-105.58

-105.57

• 105.55 TEMP/AGE CORR AMPS a****=*=*

171.88 171.95 172.02 172. 09 172.16 172.24 172.JJ 112.42 172.53 172. 65 172. 78 l72.9J 113.09 173.26

• 146. 73

-146. 70

-146.61

• 146.64

• 146.62

-146.59

-146.51

-146.54

-146.52

-146.49

-146.41

• 146.45 SBt:HJINr S2'ART *******************

AMPS AMP-HRS CELL PER PP PER PP VOLTS 21.48 21.49 21.50 2l.5l 21.52 21.53 21.54 21,5s 21.57 2l.58 21.60 2l.62 21.64 21.66

-18.34

• 18.34

• l8.JJ

-18.JJ

-18. JJ

-l8.J2

-18.32

-18.32

-18.Jl

-18.Jl

-18.Jl

• l8.Jl aacaamm 6l,65 63.44 65.23 61.02 68.Bl 70.61 12.40 14.20 16.00 77.79 19.59 81.39 83.19 85.00 86.80 86.08 85.36 84.64 83.92 83.20 82.48 Bl. 76 81.04 80.Jl 19.59 79.87

• • ===*

l.936 l.934 l.933 l.932 l.930 l.929 l.927 l.925 l.923 l.921 l.919 l.917

l. 914 l.912 l.987 l.1187 l.988 l.989 l.989 l.990 l.990 l.991 1.991 1.992 1.992 l.992 BATTBRY VOLTS

• sr*****

ll6.l 116.l ll6.0 115.9 115,8 115. 7 llS.6 ll5.5 llS.4 115.3 115.l 115.0 114. 9 ll4.'

119.2 119.2 119.J 119.3 119.J 119.4 ll9.4 ll9.4 119.5 119.5 ll9.5 119.5 POSTl'IVE PLATES:

8 NUMBER OF CBLLS:

60 AGE CORRECTION FACTOR: l.250

• • • • • • • • =*=************** SEGHEN'l' END **************************

BATTERY TEMP/ AGE AMPS CORR AMPS

• • • 1111*11 123.93 l2J.97 124.03 124.08 124.lJ

.124.20 124. 27 124,JS l24.43 124.53 124. 63 124. 75 l24.87 125.00

• 105. 73

• 105. 71

• 105.69

• 105.67

• .105.65

• 105.63

• 105.62

• 105.60

-105.58

• 105.57

• 105.55

• 105.54

=

l7l.95 172. 02 172. 09 172.16 172.24 l72.JJ 172.42 172.SJ 172.65 172. 78 172.93 113.09

.113.26 113.44

-146. 70

-146.67

-146.64

-146. 62

-146.59

• 146.57

• 146.54

-146.52

-146.49

• 146.41

• 146 *.f5

• 146.43 AHPS NIP*HRS CVHULATIVE PER PP PER PP AHP*HRS/PP

=***

21.49 21.50 21.51 21.52 2l.5J 21.54 21.55 21.57 21,5B 2.l.60 21.62 21.64 21. 66 21.68

• 18. 34

• 18.JJ

• lB.33

- 18,JJ

• l8.J2

• l8.J2

• 18.32

-18.Jl

-18.Jl

• 18.Jl

-18. Jl

• IS.JO

• ==*=*=

l. 79 l.79 l.79

l. 79 1.79 1.79 1.80 1.80 1.80 1.80 l.80 l.80 l.80 1.81

-l.53

• l.SJ

-1.SJ

• l.SJ

• l.SJ

• l.53

-1.SJ

• l.53

-1,53

• l.SJ

• l. SJ

• l.53

======a=i:n:

63.44 65.23 61.02 68.Bl 70.61 12.40 14.20 16.00

'17. 19 19.59 BJ.39 BJ.Jg 85.00 86.80 86.08 85.36 84.64 83.92 83.20 82.48

81. 76 Bl.04 80.Jl 19.59 18.87 78.15 CELL VOLT.S

=*=*1:1*

l.934

.l.933 l.932 l..930 1.929 l.927 l.925 l,923 l.92l 1.919 l.91'1 l.914 1.912 1.909 J.981 1.988 l.989 l.989 1.990 1.990 1.991 1,991 1.992 1.992 1.992 l.993 BA2TERY VOLTS

-.aa**a*

116.l 116.0 llS.9 llS.8 115.'

115.6 ll5.5 ll5.4 115.3 ll5.l ll5.0 114.9 114.7 ll4.6 ll9.2 ll9.3 119.J ll9.J 119.4 ll9.4 ll9.4 ll9.5 119.5 ll9.5 119.5 119.6 Ct!Nl1LATI'Vli AHP*ROURS DISCHAllGEJ 0*11*a****n 507.51 521. 84 536.11 550.52 564.87 579.22 593.59 607.96 622.34 636. 14 65l.l4 665.56 619.99 694.44 688.66 682.89 677.12 671.JS 665.58 659.82 654.05 648.28 642.52 636. 15 630.99 625.23 Daaa**a*Ga:m:z:i:aasaa*m*2==**Daa**==**=*n:aaaaaa*************c****m**a***=*=aa~~ ** m=aa:maa*:aaaacaco=**aaaaaaaaaeca:a:aaaaaaaaaamaa*a*********~a2*2:*:~*=~***

BUS: {#121 BA7TlfRY lB-2*

• • • SEGMENT *=**

FRCW TO 0:00:00 0:00:03 0:00:06 0:00:09 0:00:12 0:00:15 0:00:01 0:00:04 0:00:07 0:00:10 0:00:.13 0:00:16 SBGHENT START AMPS VOLTS 487.6 491.3 517.4 453.0 436.6 436.?

109.l 109.l 108.6 109.7 llO. 0 110. 0 SEGHEN:r END AMPS 487.6 491.3 517.4 453.0 436.6 436.1 VOLTS 109.l 109. l 108.6 109. 7 llO.O 110.0 PONER SOURCE: BATTERY lB*2

• • = SEGMENT====

FROM TO

==*1;-m::ra 0:00:01 0:00:04 0:00:07 0:00:10 0:00:13 0:00:16 0:00:02 0:00:05 Ot00t08 O:OO:ll 0:00:14 O:OO:l 1 Sf.'GHEBT START AMPS VOLTS 487.l 484.6 474. 8 443.2 436.2 437.l

- 120 -

109.l 109.2 109.3 109.9 llO.O 110.0 SSXlHENJ' END AMPS VOLTS 487.l 484.6 414.8 443.2 436.2 437.l 109.l 109.2 109.3 109.9 110.0 110.0 c c2 SBGHSJlr an**

FROM TO 0:00:02 0:00:05 0:00:08 O:OO:ll 0:00:14 0: 00:11 0:00:03 0:00:06 0:00:09 0:00:12 0:00:15 0:00:18 SEGMENT START AMPS VOLTS 491.5 661.l 477. 7 431.0 436.2 436.7 109.0 105.9 109.J llO,O 110.0 llO.O SSGHENr END AMPS VOLTS 491.5 667.l 477. 7 431.0 436.2 436,1 109.0 105.9 109.3 llO,O l.IO. 0 llO.O

ATTACHMENT G Calculation BNP-E-6.120 Revision 10 Attachment G Page 1 BATTERY DISCHARGE STATE AND CHARGER LOAD FOR NORMAL, POST-LOCA/LOOP AND POST-SBO OPERATION (FOR BATTERY CHARGER SIZE VERIFICATION)

EVALUATION OF BATTERY VOL TAG ES AFTER RESTORATION OF BATTERY CHARGERS

Calculation BNP-E-6.120 Revision 10 Attachment G Page2 This attachment provides a summary of the battery discharged ampere-hours for the LOCA w/LOOP and the SBO scenarios, as well as the battery charger loading during normal operation, post LOCA/LOOP duty cycle operation and post SBO duty cycle operation. This data is used by calculation BNP-E-6.079 for sizing the battery chargers. Refer to section 3.3.2 of base calculation for additional discussion on post duty cycle operation of equipment.

It should be noted that calculation BNP-E-6.079 corrects the battery discharged ampere-hours for aging (factor of 1.25) and minimum electrolyte temperature (factor of 1.11 for 60°F).

Attachment D of this calculation provides the battery discharged ampere-hours for the LOCA/LOOP and the SBO events also corrected for aging and temperature. To avoid double correction of the discharged ampere-hours, Table 1 below establishes the uncorrected ampere-hours from the corrected ampere-hours found in Attachment D.

TABLE 1 BATTERY DISCHARGED AMPERE-HOURS DISCHARGED AMPERE-HOURS DISCHARGED AMPERE-HOURS 125V Corrected for Aging Not Corrected for Aging BATTERY and Electrolyte Temperature and Electrolyte Temperature LOCA/LOOP LOCA/LOOP SBO LOCA/LOOP LOCA/LOOP SBO (Att. D)

(Att. D)

(Att. D)

(Att. D)

(Att. D)

(Att. D) at 60 Sec at 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />s*

at 60 Min) at60 Sec at 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> at 60 Min) 1A-1 8.05 0

335.49 5.80 0

241.79 1A-2 7.31 0

262.61 5.27 0

189.27 1B-1 9.91 511.22 441.10 7.14 368.45 317.91 1B-2 10.32 688.66 522.41 7.44 496.33 376.51 2A-1 8.50 31.83 360.51 6.13 22.94 259.83 2A-2 7.32 0

256.26 5.28 0.00 184.69 2B-1 9.98 524.36 466.39 7.19 377.92 336.14 2B-2 9.85 610.12 500.40 7.10 439.73 360.65 Note: Uncorrected Ampere-Hours = Corrected Ampere-Hours + (1.25 x 1.11)

• Those batteries with zero amp-hours are effectively recharged by the battery charger during operation.

TABLE 2 BATTERY CHARGER LOADING (AMPERES NORMAL POST OPERATION BATTERY (max allowable LOCA/LOOP CHARGER voltage) (from Att.

(from Att. B1) (> 4 B1 DC 52) hrs) 1A-1 96.00 287.78 1A-2 44.70 238.36 1B-1 77.60 163.57 1B-2 99.50 198.06 2A-1 95.60 304.73*

2A-2 41.80 235.68 2B-1 80.60 164.16 28-2 99.30 180.05 Calculation BNP-E-6.120 Revision 10 Attachment G Page3 POST SBO (from Att. B2 at 61 min) 158.74 103.91 124.11 163.13 147.61 89.49 134.40 151.27

• Loading exceeds battery charger rating; therefore, battery charger remains fully loaded after four (4) hours and battery continues to deplete unless load is removed.

The battery charger loading in Table 2 for normal operation is obtained from the charger load tabulation found in Attachment 81 (pg 51). It is based on a system voltage of 140 VDC, which is the charger equalize voltage.

Per the mentioned tabulation, this load is primarily from resistive type devices (as compared with constant power devices). Therefore, correction of this load to the maximum system voltage is conservative.

The Post LOCA/LOOP is found in 1 and Post 880 in Attachment 82. From this information all battery charger loads are less than 300A with the exception of battery 2A-1.

Refer to BNP-E-6.079 for analysis of the battery chargers.

ATTACHMENT H GNB BATTERY DISCHARGE CHARACTERISTICS BNP E-6.120 Revision 0 Attachment H Page 1

NUCLEAR CLASS 1 E BAfTERIES TYPE NANt -

LEAD ANTIMONY TYPE NCNt -

LEAD CALCIUM CAPACITIES -

550 A.H. to 2550 A.H.

aNP--6. 12..0 fl.i::v'1 s,"'"' ¢ ATTltl..HMeNT H PAC,E 2

,ect1on 35.40

@ 8 HOUR RATE TO 1.75 V.P.C. AVERAGE 20 VEAR LIFE EXPECTANCY SPECIFICATIONS

• Jar-Styrene-Acrylonitrile (SAN) Plastic

• Cover -

Acrylonitrite Butadiene Styrene (ABS) Plastic Separators -

Microporous Material Retainers -

Fiberglass Mats Posts -

NAN/NCN 7*17 two-1.5" (38.1 mm) square NAN/NCN 19-27 four-1.0" (25.4 mm) square NAN/NCN 29-35 four-1.5" (38.1 mm) square Post Seals -

Floating "O" Ring - Seal Nut Vents -

GNB "Pre-Vent" Flame Arrester Level Lines -

High and Low - All Jar Faces Electrolyte~ Height above plates - 2.75" (69.9 mm)

Electrolyte Withdrawal Tubes -

2 per cell Sediment Space -

1 _06" (26.9 mm)

Specific Gravity -

1.215 @ 77°F {25°C)

H Inter-Cell Connectors -

Lead Plated Copper tNAN and NCN are the nuclear variant of GNB's commercial NAX/NCX line.

Plate Dimensions

• Optional -

Polycarbonate Jar and Cover

• UL 94-V-O

• 28% Limiting Oxygen Index (LO.I.)

Qualified according to IEEE 535 Tested according to IEEE 450 Positive Plate Negative Plate Height Width 15.0 in.

12.5 in.

381.0 mm 317.5 mm 15.0 in.

12.5 in.

381.0 mm 317.5 mm NOM Amperes To 1.75 V.P.C. Average Overall Dimensions Approximate Weight Cell Type AH CAP 8 Hr. 5 Hr. 3 Hr. 1 Hr. 30 Min. 15Min. 1 Min. Length Width Height Net Packed 550 69 96 134 245 300 340 436 7.38 in 14.55 in 22.13 in 160lbs 187mm 368mm 562mm 72 k 690 86 124 165 300 454 515 582 7.38 in 14.55 in 22.13in 1771bs 187mm 388mm 562mm 80 k 825 103 149 200 375 561 686 727 7.38 in 14.55 in 22.13 in 1951bs 187 mm 388mm 562mm 89 k 950 119 171 238 450 666 814 873 7.38 in 14.55 in 22.13in 2131bs 187mm 388mm 562mm 97k 1070 134 194 277 525 768 939 1018 7.38in 14.55 in 22.13in 231 lbs 187 mm 368mm 562mm 105 k 1200 150 216 312 600

~67 1060 1165 7.38in 14.55 in 22.13 in 2691bs 187 mm 368mm 562mm 112 k 1370 171 246 357 675 953 1165 1260 9.25in 14.55 in 22.5 in 2821bs 235mm 368mm 572mm 128 k 1495 187 270 390 750 1033 1263 1400 9.25 in 14.55 in 22.5 in 301 lbs 235mm 368mm 572mm 137 k 1670 209 301 436 825 1136 1389 1540 11.38 in 14.55 in 22.5 in 3481bs 289 mm 36Bmm 572mm 158 k 1810 226 326 472 900 1232 1506 1680 11.38 in 14.55 in 22.5 in 3641bs 289mm 368mm 572mm 165 k 1945 243 351 507 975 1327 1622 1840 11.38 in 14.55 in 22.5 in 3801bs 289*mm 368mm 572mm 173 k 2150 269 389 555 1050 1429 1747 1932 14.56 in 14.55 in 22.5 in 4461bs 370mm 368mm 572mm 203 k 2280 285 411 595 1125 1531 1872 2070 14.56 in 14.55 in 22.5 in 462lbs 370mm 388mm 572mm 210 k 2415 302 435 629 1200 1633 1996 2220 14.56 in 14.55 in 22.5 in 4791bs 370mm 368mm 572mm 218 k 2550 319 459 663 1275 1735 2121 2350 14.56 in 14.55 in 22.5 in 496lbs 370mm 368mm 572mm 225 kg Thickness

.325 in.

8.26 mm

.220 in.

5.59 mm Eleclro*

lyte Per Cell 6.4 gal 24.2 li1er 6.0 ~al 22.7 iter 5.6 ~al 21.2 i1er 5.1 gal 19.3 liler 5.0 gal 18.9 liter 4.9 ~al 18.5 i1er 6.3 gal 23.8 liter 6.0 gal 22.7 liter 8.0 gal 30.3 liter 7.6 gal 28.8 liter 7.3~al 27.6 iler 11.5 gal 43.5 liter 10.9 gal 41.3 liter 10.3 gal 39.0 liter 9.7 gal 36.7 liter GNB offers a comple1e ine ol battery racks in !WO-tier. llVee*liel. and ttwo-slep mnfigurallons. and can be ordered lo suit your seismic zone reQu;rcmen&s. For lnlotmalion oo ballery racks. please refl!f lo brochure soc!ion 43.20.

N*N Nuclear Class 1 E Stationary Battery Rates Ill~ 111111111111111111111111ii1111111111111111111111111111111111111111 t~i1litijl11111111111111111111111111111 I II II Ill I I I I I I I I I I I~ 11 !::

200 190 180 170 160 1 so 140 cu 130

~ 120 II) 0 Q. 110 cu Q. 100

J 90 0 :c Q.

80 E

70 60 so 40 30 Min 20 10 0

~Min 0

10 20 30 40 so 60 70 80 90 100

, 10 120 130 140 Amp Per Positive Note: This Information represents the average performance of the line.

Qualified In accordance with IEEE Std 535*1986 Tested In accordance with IEEE Std 450-1987 Refer to the tables for actual discharge data.

(..,.,..

\\.

(

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i i

I l

i l I

I 1

-I

• I j

l f

! it)*

()**,

~

CELL TYPE 8 I End Voltage -

1. 75 NANINCN-7 69 NANINCN-9 86 NANINCN-11 103 NANINCN-13 119 NAN/NCN-15 134 NANINCN-17 150 NANINCN-19 171 NANINCN-21 187 NANINCN-23 209 NANINCN-25 226 NANINCN-27 243 NANINCN-29 269 NANINCN-31 285 NANINCN-33 302 NAN/NCN-35 319 End Voltage -

1. 78 NA.NINCN-7 67 NANINCN-9 83 NANINCN-11 100 NANINCN-13 115 NANINCN-15 130 NANtt4CN-17 146 NANINCN-19 165 NANINCN-21 182 NANINCN-23 202 NAN!flCN-25 219 NANINCN-27 237 NM-mCN-29 260 NAN!flCN-31 275 NANmCN-33 292 NAN/NCN-35 310 End Voltage -

1.81 NANINCN-7 65 NANINCN-9 81 NAN/NCN-11 97 NAN/NCN-13 112 NAN/NCN-15 127 NANINCN-17 141 NAN/NCN-19 161 NAN,t.!CN-21 176 NAN/NCN-23 197 NANINCN-25 213 NANINCN-27 229 NANINCN-29 254 NANINCN-31 268 NANtt4CN-33 284 NAN.INCN-35 300 AMP DATA NAN/NCN CELLS HOURS 5 I 4 I 3 I 2 I 1.5 I 96 11i 134 170 207 124 138 165 204 240 149 167 200 252 300 171 198 238 292 345 194

'121 m

350 412 216 254 312 405 465 246 290 357

48) 535 270 317 390 515 590 301 354 436 560 660 326 384 472 615 725 351 412 507 670 785 389 455 555 715 857 411 483 595 710 925 435 512 629 820 995 459 539 663 868 1053 93 108 129 165 197 120 132 156 196 228 144 162 193 242 285 166 190 228 280 328 187 220 261 336 391

?OQ 244 293 389 442 239 279 333 442 508 262 305 366 494 561 292 341 407 538 r;n 316 369 440 590 689 340 396 476 643 746 375 441 522 694 814 399 465 555 747 879 4'12 492 586 795 945 445 518 623 842 1000*

90 104 124 153 182 117 127 152 184 211 140 156 185 227 264 162 183 218 263 304 182 211 252 315 363 203 236 285 365 409 232 201 324 414 471 254 295 357 464 519 284 327 396 500 581 307 357 428 554 638 330 383 464 603 691 364 423 509 643 754 387 465 540 693 814 410 492 571 738 875 432 518 606 781 926 1

245 300 375 450 525 600 675 750 825 900 975 1050 1125 1200 1275 228 279 349 419 488 558 628 698 767 837 907

'D7 1046 1116 1186 208 255 319 383 446 510 574 638 701 765 829 893 956 1020 1084

"&Jp :..£-6. izo llJWJ SI o,../ fl!

ATr~cH~cwr H PA4 if MINUTES 30 I 15 I 1 300 340 436 454 515 582 561 686 7'Zl 666 814 873 768 939 1018 867 1060 1165 953 1165 1260 1033 1263 1400 1136 1389 1540 1232 1506 1680 1327 1622 1840 1429 1747 1932 1531 1872 2072 1633 1966 2220 1735 2121 2350 282 324 383 376 432 510 470 540 637 564 648 765 658 756 892 752 864 1020 846 972 1107 940 1080 1230 1034 1188 1287 1128 1296 1404 1222 1404 1521 1316 1512 1624 1410 1620 1740 1504 1728 1850 1598 1836 1970 255 285 330*

340 380 440 425 475 550 510 570 660 595 665 no 680 760 880 765 855 954 850 950 1060 935 1045 1100 1020 1140 1200 11n; 1235 1306 1190 1330 1386 1275 1425 1485 1360 1520 1600 1445 1615 1700