ML083230045

Response to Request for Additional Information on Battery and DC Sources Upgrades and Cross-Tie License Amendment Request and Replacement Technical Specification Pages

ML083230045
Person / Time
Site:	San Onofre
Issue date:	11/14/2008
From:	Short M Southern California Edison Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
TAC MD8213, TAC MD8214
Download: ML083230045 (18)

Text

Michael P. Short J EDISON° SOUTHERN CALIFORNIA An EDISON INTERNATIONALS Company Vice President November 14, 2008 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

Subject:

Docket Nos. 50-361 and 50-362 Response to Request for Additional Information on Battery and DC Sources Upgrades and Cross-Tie License Amendment Request and Replacement Technical Specification Pages San Onofre Nuclear Generating Station, Units 2 and 3

References:

1. June 5, 2008 letter from A. E. Scherer (SCE) to Document Control Desk (NRC),

Subject:

Docket Nos. 50-361 and 50-362, Response to Request for Additional Information on Battery and DC Sources Upgrades and Cross-Tie License Amendment Request and Replacement Technical Specification Pages, San Onofre Nuclear Generating Station, Units 2 and 3

2. November 30, 2007 letter from B. Katz (SCE) to Document Control Desk (NRC),

Subject:

Docket Nos. 50-361 and 50-362, Proposed Change Number (PCN)-548, Revision 3, Battery and DC Sources Upgrades and Cross-Tie, San Onofre Nuclear Generating Station, Units 2 and 3 (TAC NOS. MD8213 and MD8214)

Dear Sir or Madam:

In telephone conversations on September 4, 18, and 29, October 27 and 31, 2008, the Nuclear Regulatory Commission staff requested additional information regarding Proposed Change Number (PCN) 548, Revision 3, Battery and DC Sources Upgrades and Cross-Tie (Reference 2). The NRC staff question and Southern California Edison's (SCE's) response are provided below.

NRC Question:

The proposed Completion Time (CT) of 21 days for TS 3.8.4 Condition E (DC System Buses cross connected) is excessive compared with the industry norm. Maintenance activities should not require 21 days. Also, the NOTE includes a CT of 30 days for P.O. Box 128 San Clemente, CA 92674-0128 (949) 368-3780 Fax: (949) 368-3770

Document Control Desk November 14, 2008 upgrade of the batteries. Currently, 14 days is the longest approved CT for the industry.

Explain the basis for the proposed CTs.

SCE Response:

SCE has reviewed the activities and durations to be performed with same train subsystems cross-connected for both routine online maintenance and testing activities and battery replacements. Enclosure 1 provides the detail of these activities and their durations. As a result of the referenced telephone discussions with the NRC, SCE proposes to modify TS 3.8.4 Condition E with shorter Completion Times as shown below:

"DC Subsystem Buses cross connected (1800 amp-hour rated battery required)."

Condition E includes the following Required Action and Completion Time (CT):

E.1 Restore DC Subsystem Buses to non-cross-connected configuration.

CT: 4 days This CT is modified by a NOTE: Completion Time is 14 days when cross connected for battery replacement.

The 4-day duration is adequate for routine maintenance activities, such as modified performance discharge testing in Modes 1 through 4.

The 14-day duration allows for future replacement of a battery bank. Some upgrade activities, such as replacement of battery racks and battery room modifications to accommodate the larger battery cells, are not included in the 14-day duration and will be performed prior to battery cell replacement.

SCE's response to the NRC request requires one change to the previously submitted proposed Technical Specification (TS) pages. Enclosure 2 provides the required replacement TS pages for Attachments C, D, E, and F of PCN 548, Revision 3 (Reference 2). No other changes are required. There is no change to the No Significant Hazards Consideration submitted with Reference 2 as a result of these changes.

Attachment H of Reference 2 provided the Summary of Regulatory Commitments.

Commitments 7 and 8 of Attachment H are revised, and a new Commitment 10 is added in this submittal. See Enclosure 3 for the revised Attachment H.

If you have any questions or require additional information, please contact Ms. Linda T.

Conklin at (949) 368-9443.

Document Control Desk November 14, 2008 I declare under penalty of perjury that the foregoing is true and correct.

Executed on (ae 0/0//

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Enclosures:

1. Spreadsheet with durations for Battery Replacement Activities and Discharge Test Activities

2. Replacement Technical Specification pages for Attachments C, D, E, and F to Enclosure 3 of PCN-548, Revision 3

3. Revised Attachment H to Enclosure 3 of PCN-548, Revision 3 cc: E. E. Collins, Regional Administrator, NRC Region IV N. Kalyanam, NRC Project Manager, San Onofre Units 2 and 3 G. G. Warnick, NRC Senior Resident Inspector, San Onofre Units 2 and 3 S. Y. Hsu, California Department of Public Health, Radiologic Health Branch

Enclosure 1 Spreadsheet with durations for Battery Replacement Activities and Discharge Test Activities

Battery Replacement and Discharge Test - TS Completion Time

-, p Battery Replacement Activities Duration -. hours Discharge Test Activities - Duration-hours (every 2.5yr) I

-. ~ ~ 1 1a 1~tcl 1?7lth I Cross-tie implementation I 2 Remove cable connections, connectors and jumper cable connections. 12 3 Remove old battery jars 32 7 Reconfigure to 60 cells, connect load bank & labview 4 Battery Rack Inspection and touchup paint 12 Install new battery jars. complete power cable, connectors and jumper connections ( 60 cells) 5

• Affix electrolyte stickers 96 4

" Add Electrolyte 4 Install Labview 3 6 Freshening Charge and 72hr float charge 83

. Quarterly Surveillance 4 7 Perform "Modified Performance" Discharge test 6 6

. Thennography 4 4 8 Rapid Recharge battery bank II 11 Reconfigure to 58 Cells, Spare cells on its charger. 8 Remove Labview 3 3 9 Select Pilot Cell 8 2 2 Physical Inspection of the jars 8 9 Repairs (i.e. replace failed cell), if required Place 58 Cells on float charge 2 8 10 Perform Weekly Surveillance 2 2 2 WAR Closure 8 0 II Return to Service (remove crosstie) 2 TOTAL WORK HOURS 265 42 48 17 Plus 21% CONTINGENCY 71 48 Plus 50% CONTINGENCY TOTAL HOURS 336 96 TOTAL TS COMPLETION TIME 14 DAYS 4 DAYS

Enclosure 2 Replacement TS pages for Attachments C, D, E, and F to Enclosure 3 of PCN-548, Revision 3

ATTACHMENT C Proposed Change Number (PCN) 548, Rev. 3 Proposed Technical Specification pages, Underline and Strikeout, Unit 2 Replacement TS page 3.8-25

DC Sources--Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME DA. One DC electrical DA. IRestore DC electrical 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> power subsystem power subsystem to LLC _)d OPERABLE status.

d~uLidLl~d LuIIL[ul eguipniieiiL ur LaJliiy OR inoperable for reasons other-than D.2 Cross connect with same 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Condition A or B. train DC subsystem:= 0 amp-hour rated battery required).

E. DC Subsystem Buses E.1 Restore DC Subsystem Buses ----- NOTE ------

cross connected to non-cross-connected Completion Time (1800 amp-hour rated contiguration. is 14 days when battery required), cross connected Tor batter replacemenf.

4 daysL Ft. Required Action and Ft.IBe in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Associated Completion Time of Condition D or E-hot AND met.

Ft.2Be in MODE 5. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> (L'all t i nuEtt SAN ONOFRE--UNIT 2 3.8-25 Amendment No. t2t

ATTACHMENT D Proposed Change Number (PCN) 548, Rev. 3 Proposed Technical Specification pages, Underline and Strikeout, Unit 3 Replacement TS page 3.8-25

DC Sources--Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME DA. One DC electrical DA.iRestore DC electrical 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> power sutsysem power subsystem to b ry ur

__L OPERABLE status.

aQUUIaL*d LUIILIUl Yqui pIII L ui L L) III I OR inoperable for reasons oteh-rthan D.2 Cross connect with same 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> Condition A or B. train DC subsystem (1800 amp-hour rated battery required).

E. DC Subsystem Buses E.1 Restore DC Subsystem Buses ----- NOTE ------

cross connected to non-cross-connected Completion lime (1800 amp-hour rated contiquration. is 14 days battery required), when cross connected for batter rep acement.

_4 days Ft. Required Action and Ft.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Associated Completion Time of AND Condition D or E--ot met. Ft.2Be in MODE 5. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> SAN ONOFRE--UNIT 3 3.8-25 Amendment No. ttt

ATTACHMENT E Proposed Change Number (PCN) 548, Rev. 3 Proposed Technical Specification pages, Unit 2 Replacement TS page 3.8-24

DC Sources--Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. One DC electrical D.1 Restore DC electrical 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> power subsystem power subsystem to inoperable for OPERABLE status.

reasons other than Condition A or B. OR D.2 Cross connect with same 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> train DC subsystem (1800 amp-hour rated battery required).

E. DC Subsystem Buses E.1 Restore DC Subsystem Buses ----- NOTE -----

cross connected to non-cross-connected Completion Time (1800 amp-hour rated configuration, is 14 days when battery required). cross connected for battery replacement.

4 days F. Required Action and F.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Associated Completion Time of Condition D orwE not met.

F.2 Be in MODE 5. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> SAN ONOFRE--UNIT 2 3.8-24 Amendment No.

ATTACHMENT F Proposed Change Number (PCN) 548, Rev. 3 Proposed Technical Specification pages, Unit 3 Replacement TS page 3.8-24

DC Sources--Operating 3.8.4 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME D. One DC electrical D.1 Restore DC electrical 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> power subsystem power subsystem to inoperable for OPERABLE status.

reasons other than Condition A or B. OR D.2 Cross connect with same 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> train DC subsystem (1800 amp-hour rated battery required).

E. DC Subsystem Buses E.1 Restore DC Subsystem Buses ------ NOTE -----

cross connected to non-cross-connected Completion Time (1800 amp-hour rated configuration. is 14 days when battery required). cross connected for battery replacement.

4 days F. Required Action and F.1 Be in MODE 3. 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> Associated Completion Time of AND Condition D or E not met. F.2 Be in MODE 5. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> SAN ONOFRE--UNIT 3 3.8-24 Amendment No.

Enclosure 3 Revised Attachment H to Enclosure 3 of PCN-548, Revision 3

ATTACHMENT H Proposed Change Number (PCN) 548, Rev. 3 Batteries Upgrade and DC Cross-tie Capability San Onofre Nuclear Generating Station, Units 2 and 3 Summary of Regulatory Commitments

Summary of Regulatory Commitments The following table identifies commitments made in this document. (Any other actions discussed in the submittal represent intended or planned actions. They are described to the NRC for the NRC's information and are not regulatory commitments.)

COMMITTED DATE COMMITMENT TYPE COMMITMENT OR "OUTAGE" One-Time Programmatic Action (Yes/No)

(Yes/No)

1. Include minimum established float Implemented by TS Yes Yes voltage of >129.0 V in proposed Amendment Technical Specification (TS) Bases and implementation date.

Licensee Controlled Specifications (LCS).

2. Relocate the requirements of existing Implemented by TS Yes Yes Surveillance Requirements (SRs) 3.8.4.2 Amendment (connection resistance, visible implementation date.

corrosion), 3.8.4.3 (physical damage or deterioration), 3.8.4.4 (terminal connections), and 3.8.4.5 (connection resistance) from the TSs to the LCS.

Change frequency of existing SR 3.8.4.2 from 92 days to 31 days in LCS.

3. Relocate specific gravity monitoring to Implemented by TS Yes Yes the proposed Battery Monitoring and Amendment Maintenance Program. This specific implementation date.

gravity monitoring will be performed prior to each battery discharge test.

4. Relocate battery parameters of cell Implemented by TS Yes Yes voltage, electrolyte level, electrolyte Amendment temperature, and float voltage from TS implementation date.

3.8.6 to the proposed Battery Monitoring and Maintenance Program.

5. Maintain a capacity margin (presently Calculation approved Yes Yes 2%) to account for the uncertainty in the 9/5/2007 and issued by battery capacity assigned by the Corporate Document manufacturer for allowed float current Management.

limit of 1.50 amps for 1800 amp-hour batteries and 0.75 amp for 1260 amp-hour batteries.

6. Appropriate design features will be Implemented per Yes Yes added to measure float charging current Engineering Change when a swing battery charger is aligned Package (ECP) by TS to a Class 1 E subsystem battery. Amendment implementation date.

7. Include appropriate battery maintenance Implemented by TS Yes Yes practices from industry standard IEEE Amendment 450-2002, and Reg. Guide 1.129, Rev. implementation date.

2, Positions 1, 2, 3, 6, and 8 in the new LCS.

8. Include minimum established float Implemented by TS Yes Yes voltage values for the battery charger in Amendment the new LCS Bases. implementation date.

9. Revise Operations procedure to provide Implemented by TS Yes Yes ability to power a spare battery charger Amendment from a diesel-backed source. This implementation date.

includes having all preparations in place prior to the 72-hour CT.

10. Equipment that will be used to monitor Implemented by TS Yes Yes float current will have the necessary Amendment accuracy and capability to monitor implementation date.

electrical current in the expected range.