ML11242A232

Notification N N 201340427

ML11242A232
Person / Time
Site:	San Onofre
Issue date:	02/19/2011
From:	Southern California Edison Co
To:	Office of Information Services
References
FOIA/PA-2011-0157
Download: ML11242A232 (19)

Text

Unit 3 I

System Status:

NOPR NOPT ORAS OSTS User Status:

CRTD STA ESCP ACRO SONG;S Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC Created on: 02/19/2011 Reported By:

.(b)(6)...

Responsible: (b)(6)

Priority: 4 Medium Required Start: 04/13/2011 14:07 Order No: 800663593 Code:

Task Exists?

[Y)

End: 08/10/2011 14:07 Func.Loc.: S3.DCPS.38007 125V STATION BATTERY 3B007 Equipment:

Assembly:

Quality Class: II Location: Control Building Room:

Elevation:

Column:

Planner Group: Maint Electrical WorkCenter: M PLEI Electrical/I&C/TT Planning Plant: 1000 SONGS

- Services Reliability Classification: CRITICAL-A ARC Review Status: C Completed Feedback Req'd?

[XI M Rule:

Sig Level: 4 Low Level Problem, Take Action/Trend Breakdown

[]

Malfunction Start: 02/19/2011 06:37 Breakdown Duration:

H End:

==

Description:==

02/19/2011 02:49:55i(b)(6)

1. Problem description while performing orderf# 800393549 on 3B007 performance test section 6.4.24 of S023-I-9.97 cell#38 reading of 2.1160 VDC fell below the acceptable limits of < or = to 2.1317.

2.

Impact or consequence no effect to operability

3.

Describe what happened while performing order# 800393549 on 3B007 performance test section 6.4.24 of S023-I-9.97 cell#38 reading of 2.1160 VDC fell below the acceptable limits of < or = to 2.1317.

4.

Immediate actions taken notified srgf, wrote an email to engineer and wrote this NN

5. Extent of Condition (as applicable)

6.

Cause (if known)

Print Date: 04/05/2011 Page 1 of 19 A4 V. i )

4.-

I Notification Continued SONGS Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC Description Continued:

7. Recommended Actions engineer needs to evaluate Print Date: 04/05/2011 Page 2 of 19 Print Date: 04/05/2011 Page 2 of 19

Task Summary SON(d"S Notification:

NN 201340427 Func.Loc.: S3.DCPS.3B007 125V STATION BATTERY 3B007 Location: Control Building Room:

Elevation:

Column:

Task No.:

0001 Task No.:

0002 Task No.:

0003 Code Group:N-TS-IOD Short Text:

Task Code: N030 WorkCenter: EMPES Responsible: [b()

Immediate Operability Determination IOD-Equipment OPERABLE Electrical Systems I

Code Group:N-EOCO Extent of Condition-Operability Short Text:

Task Code: E030 CCI BW Sizing WorkCenter: EM PES Electrical Systems Responsible: 1(b)(6)

Code Group:N-POD Prompt Operability Determination Short Text:

Task Code: P040 POD Closed WorkCenter: E fM.ECE El ec tr ical PI qm Responsible: ý(b )(6)

Task No.:

0004 Task No.:

0005 Task No.:

0006 Code Group:N-SPT General Support Record Short Text: trend cell performance Task Code: ST03 SPT Performing Support WorkCenter:

EM PES Electrical Systems Responsible: (b)(6)

Code Group:N-RPT Reportability Assessment Short Text:

Task Code: RP65 RPT Complete Not Reportable WorkCenter: R C Regulatory Compliance Responsible: I()(6)

Code Group:N-P21 10 CFR Part 21 Evaluation Short Text: based on charge results Task Code: P101 P21 Evaluation Created WorkCenter:

MPES__Elect-ricaal Systems Responsible: (b)(61 Print Date: 04/05/2011 Page 3 of 19 Print Date: 04/05/2011 Page 3 of 19

Trending Worksheet SON(IS Notification:

NN 201340427 Func.Loc.: S3.DCPS.3BOO7 125V STATION BATTERY 3B007 Part:

Damage:

Cause:

Activity:

Part:

Damage:

Cause:

Activity:

Part:

Damage:

Cause:

Activity:

Part:

Damage:

Cause:

Activity:

Print Date: 04/05/2011 Page 4 of 19

I Task Details SN(l(;s Notification:

NN 201340427 Func.Loc.: S3.DCPS.3B007 125V STATION BATTERY 3B007 Location: ConLrol Building Room:

Elevation:

Column:

Task No.:

0001 Code Group: N-TS-IOD Immediate Operability Determination Short Text:

Task Code: NO30 IOD-EquipmenL OPERABLE WorkCenter: EM PES Electric al SVV_}ems Responsible l(b)(6)

Status:

TSOS Planned Start: 03/15/2011 Planned End: 04/15/2011 Complete:

Task Long Text:

.OD; Immediate OperabiLi.ty Determination

[KEY POINTS]

Refer to SO123-XV-52 for guidance OTE:

Operability Determinations shall only be completed by the on-shift SRO.

Other cognizant personnel may complete other sections of the IOD as needed.

[I] Notification Number: 201340427 (2] Deficiency Ldentification and the Affected Functional Location:

S3.DCPS.3B007, 125V STATION BATTERY 3B007 while performing order# 800393549 on 3B007 performance test section 6.4.24 of S023-I-9.97 cell#38 reading of 2.1160 VDC fell below the acceptable limits of < or = to 2.1317.

[31 Identify the Specified Safety Function(s),

include mission time (if applicable):

REF: LCO 3.8.4 Bases:

The station DC electrical power system provides the AC emergency power ystem with control power.

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

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

In case of Print Date: 04/05/2011 Page 5 of 19

jTask Details Continued Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC loss of normal power to Lhe required battery charger, the DC load is automatically pocwered from the station batteries.

Class 1K batteries for Trains A and B are sized for 90 minutes of operation without support of a battery charger, while batteries for Trains C and D are sized for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

By implementing the load reductions during a station blackout event, the blackout duty cycles for Batteries A and B can be met for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> per Battery Sizing Calculation E4C-017.

REF UFSAR section 8.3.2.1.2.1 Mission time is 120 days for DC power system. REF: UFSAR table 3.11-2

[4]

Conclusion:

Determine OLPERAK,}E/ LNOPFRABLE X

OPERABLE INOPERABLE

[5] Basis for Conclusion (Provide discussion):

rhe limit of 2.1.317 VDC is an admin limit for individual battery cells.

Mhe tech spec limit (TCO 3.8.6 cond A) is 2.07 VDC.

A reading of 2.1160 JDC is above the tech spec limit. There is a reasonable expectation that there is enough voltage margin for this battery bank to perform its specified safety tunction for its mission time and therefore remains Dperable.

Ndditional. info: Entered LCS 3.8.106 condition C for not meeting

-urveillance SR 3.8.106.6 (voltage < 2.13 VDC).

All required actions are

ompleted.

(C.l) voltage reading is

>= 2.07 VDC.

(C.2) 1(b)(6)

Df engineering, is assigned the task to trend cell performance.

(C.3) 9MO 800663593 created to restore affected cell to >= 2.13 VDC.

POD created to support conclusion.

(6] Extent of Condition: Address the question: #Does the degraded or aonconforming condition currently exist on the other train/unit?#

Ireate an EOC Task to address the extent of condition. Yes

[7]

If no EOC Task has been created to describe #other train/other unit#

Eindings, then provide justification.

Print Date: 04/05/2011 Page 6 of 19 Print Date: 04/05/2011 Page 6 of 19

-J Task Details Continued SON(GS Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC

[81 INITIAL REVIEWS:

SRO/STA Name:(b)( 6 )

SM Name: (b)(6)

[9] IOD Closure Information (Basis for closure):

"he limit of 2.1317 VDC is administratively set for individual battery elLs and provides indication of possible cell and battery degradation before reaching LCO limits.

The Tech Spec limit (LCO 3.8.6 CONDITION A) and LCS Limit is 2.07 VDC.

Monitoring of the cell voltage confirmed cell #38 voltage is being maintained above 2.1317.

As such, there is reasonable expectation that Lhe battery bank will perform its specified safety function for its mission time.

The battery and cell 438 are continualLy monitored via the battery surveillance program, which provi.des an early warning of any changes cell voltage.

The early warning provides ample time to take action to return the cell to required voltage or action to replace the cell.

((he cell continues to be operable and is maintaining the required design voltage above 2.1317 VDC.

[10] Closure Review Performer Name:

Peer Check Name:

Print Date: 04/05/2011 Page 7 of 19 Print Date: 04/05/2011 Page 7 of 1.9

Task Details SN(N(,S Notification:

NN 201340427 Func.Loc.: S3.DCPS.3B007 125V STATION BATTERY 3B007 Location: Control Building Room:

Elevation:

Column:

Task No.:

0002 Code Group: N-EOC0 Extent of Condition-0perabiLity Short Text:

Task Code: E030 CCI BW Sizing WorkCenter:

EM PES Electrical Systems Responsible: 1(b)(6)

S ta tus :

TSCO.................

Planned Start: 03/28/2011 Planned End: 03/28/20ti Complete: 03/22/201.1 06:20 Task Long Text:

EOC (Extent of Condition Assessment) 201340427 Perform an Extent of Condition (EOC) evaluation for an identified deficiency to determine if the deficiency currently exists elsewhere.

Do not use thi.s method to determine cause; use a DCE, ACE or RCE as appropriate to determine the cause.

rhis EOC is for degraded ICV (individual cell voltage) found in cell #38 in battery bank 3B007.

On 02/19/2011 while performing order# 800393549 in 3B007 modified performance test completion of the rapid recharge section 6.4.24 of S023-I-9.97 cell #38 was found at 2.1.160 VDC which is below the acceptable administrative limits LCS 3.8.106.6 of 2.1317 VDC.

If the EOC is being used to not delay completion of an Immediate Dperability Determination or a Prompt Operability Determination, consider only "other train / other unit" app'lications.

For all other EOC uses, determine and evaluate scope as necessary.

Refer to SO123-XV-52 and S0123-XV-50 CAP-3.

1. Affected Equipment (See deficiency description or, if the deficiency Jescription is incomplete or incorrect, describe) l'he 1E battery banks 3B007 is composed of 60 type 2GN-23 ENERSYS cells.

Cell 438 was found degraded with an ICV of 2.1160 VDC after a modified performance surveillance and rapid recharge.

SONGS has 8 1E battery Danks and 4 non 1E battery banks on site that contain the 2GN-23 type cells.

The total number of 1E cells on site amounts to 480 type 2GN-23.

Print Date: 04/05/2011.

Page 8 of 19

I Task Details Continued S()N(CS Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC Battery Banks 2B007,

2B008, 2B009,

2B010, 3B007,

3B008, 3B009,

3B010, each battery bank contain 60 2GN-23 cells.

The 4 non-lE battery banks

2B012, 2B016, 3B012 and 3B016 each Non 1E battery banks contain 1.24 2GN-23 cells each for a total of 496 The total number of 2GN-23 cell on it is 976 cel.ls.

2. Deficiency Identification (See description or, if the description is incomplete oi: incorrect, describe) egrading ICV (individual cell voltage) found in 2GN-23 type battery ell.

Battery 31007 is made up of 29 battery jars each jar contains 2 ells, with 1 additional spare jar.

During a modified performance surveillance and rapid recharge surveillance cell #38 did not return to the expected TCV > 2.2 volts and was below the LCS administrative limit of 2.13 VDC at. 2.1160 VUC.

3. Discussion of fLndings, including the basis for the conclusion:

Over the past 5 years SONGS replaced all 8 of the 1E battery banks with type 2GN-23 battery jars.

There are currently 976 cells of this type on site.

To date we have experienced one degrading ICV in battery bank 2B008 cell #13 which is same type cell (2GN-23) in battery bank 3B007.

The cell was removed and sent to the vendor for testing and evaluation.

The results of the evaluation determined that the cell had a nanufacturing defect in one separator between a positive and negative plate.

The evaluation and testing also determined that the cell was capable of performing its design function despite the defect.

The SONGS Battery surveillance program verifies cell condition on a nonthly and quarterly basis.

The battery surveillance program documents monthly pilot cell and quarterly Individual Cell Voltage values.

Based on review of all surveillance records no other low Individual Cell Voltages were found with a lower than expected individual cell voltage.

As part of the Modified performance test and rapid recharge for 3B007 all other individual cell voltages were verified and found to satisfactory.

Therefore, it is reasonably assured that this is an isolated incident and the deficiency does not exist in any other cells.

Prepared by (b)(6)

Reviewed by:

Print Date: 04/05/2011 Page 9 of 19 Print Date: 04/05/2011 Page 9 of 19

J Task Details SON(;S Notification:

NN 201340427 Func.Loc.: S3.DCPS.3B007 125V STATION BATTERY 3B007 Location: Control Building Room:

Elevation:

Column:

Task No.:

0003 Code Group: N-POD Prompt OperabiLity Determination Short Text:

Task Code: P040 POD Closed WorkCenter: EMECE Electrical Programs Responsible:

b(6)

Status:

TSCO Planned Start: 02/21/2011 01:45 Planned End: 02/21/2011 01:45 Complete: 02/21/2011 01:45 Task Long Text:

POD, Prompt Operabilit.y Determination

[KEY POINTS]

Refer to S0123-XV.52 for guidance

[11 Notification Number:

201.34042"7 (See NN 200834923 for similar type of event involving a pilot cell.)

[21 Describe the as-found condition and the equipment affected, assuring Lhal the problem and scope have been clearly identified:

33.DCPS.3B007, 125V STATION BATTERY 3B007 fhile performing order# 800393549 on 3B007 performance test section 6.4.24 of S023-I-9.97 cell#38 reading of 2.1160 Vdc fell below the acceptable limits of < or = to 2.1317 Vdc.

[31 If it is confirmed at this stage that no degraded, nonconforming or ananalyzed condition exists, record as such and provide justification:

[4) Specified Safety Function(s) of the affected SSC:

REF: LCO 3.8.4 Bases (and LCS 3.8.106):

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

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

)uring normal operation, the 125 VDC load is powered from the required oattery charger with the batteries floating on the system. In case of loss of normal power to the required battery charger, the DC load is Print Date: 04/05/2011 Page 10 of 19

j

Task Details Continued SON(;S Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC automatically powered from the station batteries.

Class IE batteries for Trains A and B are sized for 90 minutes of operation without support of a battery charger, while batteries for Trains C and D are sized for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />. By implementing the load reductions during a station blackout event, the blackout duty cycles for atteries A and B can be met for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> per Battery Sizing Calculation

• 4C 017.

REF UFSAR section 8.3.2.1.2.1 Mission time is 120 days for DC power system. REF: UFSAR table 3.11-2

[51 Technical Basis for Determining Impact on Specified Safety

'unction(s):

rhe limit: of 2.1317 Vdc has been administratively set for i.ndividual.

batLery cells. The Tech Spec limit (LCO 3.8.6 CONDTTION A) and LCS Limit is 2.07 Vdc.

A reading of 2.1160 Vdc is above these limits. As such, there is reasonable expectation that the battery bank will perform its pecified safety function for its mission time.

[61 Specified Safety Function(s) Satisfied (Yes/No):

YES.

('1] Continued Degradation applicability:

Per telecon with the cognizant engineer the Cell # 38 should be charged with a single cell charger to bring up the voltage above the administrative voltage of 2.1317 Vdc. The voltage should be monitored on an hourly basis for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and if the results are SAT (Cell voltage greater than 2.1317 Vdc) then the cell should be monitored as the pilot cell to assure the performance of Cell# 38.

rhe above actions are required to meet the Battery Parameters #LCS Section 3.8.106.6 Required Actions (C.1, C.2 and C.3).

VMO #8006635934 has been generated to charge Cell# 38 and monitor the status.

rhe SPT task 4 under thin Notification will document the cell voltages for trending.

(8] Compensatory Measures required:

ýJone.

Monitoring will be required as described under (7].

Print Date: 04/05/2011 Page 11 of 19 Print Date: 04/05/2011 Page 11 of 19

-Task Details Continued SON(;S Notification:

NN 201340427 escription: battery voltage below 2.13 VDC

[9] Extent of Condition Consideration NOTE: This section is only applicable when the SSC does not meet a Specified Safety Function. Address the question: #Does the degraded or nonconforming condition currently exist on the other train/unit?#

las an EOC 'T'ask been created to address the extent of condition (YES or O)?

Yes.

]OJ IF no EOC Task has been created, THEN describe itother train/other unitfl findings (i.'

performed) or indicate N/A (if not necessary)

[.1] PERFORM POD reviews:

(b)(6) 1 2/20/2011 POD Performance Engineer/Date (PQS l'3EN13 Required) i(b)(6) 2/

0 1 Engineering Peer Check/Date!

2/20/11 (PQS T3EN13 Required)qualified T3ENI3 expires 8/26/12

[12]

POD Real Time Review:

Independent Reviewers/Date (b)(6) 2-20-11 (PQS PODRTR Required)

Reviewed by:

(b)(6)

STA 2/20/2011 Peer Checked '

uy-SM 2/20/2011 Print Date: 04/05/2011 Page 12 of 19 Print Date: 04/05/2011 Page 12 of 19

ITask Details SON(GS Notification:

NN 201340427 Func.Loc.: S3.DCPS.3B007 125V STATION BATTERY 3B007 Location: Control Building Room:

Elevation:

Column:

Task No.:

0004 Code Group: N-SPT General Support Record Short Text: trend cell performance Task Code: ST03 SPT Performing Support WorkCenter: EM PES Electrical Systems Responsible:

Status:

TSOS Planned Start: 02/23/2011 Planned End: 04/15/2011 Complete:

Task Long Text:

SPT (General Support Record)

Describe the General support. request: 201340427 I'rend cell :38 performance per LCS 3.8.106.6 (C2).See NMO 800663593 for cell voltage data.

Engineering reviewed all pervious quarterly surveillance on 3B007 and confirmed that the cell #38 ICV were above the administrative limit.

NMO 800663593 was the first time the ICV was found below the 2.13 VDC limit.

NMO 800663593 was generated to perform a single cell charge on cell #38, the object of the single cell charge was to determine if there the cell will respond and return to a normal ICV of approximately 2.2 VDC.

The results of the single charge will help determine any further action.

NMO 800663593 Cell #38 voltage was taken and found to be greater than 2.1317 volts (2.1467) and the NMO closed with no further action.

ontact with the vendor Enersys who recommended a single cell charge be performed on cell #38 to determine if cell has degraded ICV.

The single cell charge is required to determine if the cell has capability to supply required voltage and current to satisfy its safety design function.

• MO 800676380 issued to perform a single cell charge on cell #38, scheduled for 3/28/2010.

This task will be maintained open to track the single cell charge and ICV for this cell.

This is expected to be

ompleted by 4/4/11.

Print Date: 04/05/2011 Page 13 of ].9

Task Details Continued SON( ;S Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC rhe results of the single cell charge?

ihat action need to be taken?

Evaluated by: (b)(6)

Peer check by:

Print Date: 04/05/2011 Page 14 of 19 Print Date: 04/OS/2011 Rage 14 of 19

Task Details Notification:

NN 201340427 Func.Loc.: S3.DCPS.3B007 125V STATION BATTERY 3B007 Location: Control Building Room:

Elevation:

Column:

Task No.:

0005 Code Group: N-RPT Reportability Assessment Short Text:

Task Code: RP65 RPT Complete Not Reportable WorkCenter: RC Regulatory Compliance Responsible:

(b)(6)

Status:

TSCO Planned Start: 03/28/201L Planned End: 03/28/2011 Complete: 03/16/2011 12:35 Task Long Text:

N 201340427 task 5 TECHNICAL ASSESSMENT TEMPLATE NOTE:

ENGINEERING JUDGEMENT may be used to answer questions.

However, the basis for the judgment needs to be documented to validate the judqment.

For the purposes of determining REPORTABILITY, it is only necessary for the individual responding to these question to identify a single occurrence within the previous three years where the SPECIFIED (SAFETY)

FUNCTION was incapable of being fulfilled (i.e.,

both trains of redundant systems were INOPERABLE OR NON-FUNCTIONAI.).

when the requested questions in SECTION 2 are answered, then the assigned individual should reassign the N-RPT to an RP25 status.

ONLY an NRA PQS 270QC7 qualified individual may reassign an N-RPT task to a status RP30 or higher.

SECTION 1 - Initial Reportability Assessment (RPl0)

[To be completed by PQS 270QC7 Qualified individual.]

On 02/19/2011 while performing order# 800393549 on 3B007 Battery erformance test procedure S023-I-9.97, during the rapid recharge ection 6.4.24 cell #38 as left individual cell voltage reading was

.1160 VDC which is below the administrative limits of < or = to 2.1317.

Prepared By:

Date:

Print Date: 04/0"5/2011 Page 15 of 19

Task Details Continued SON( S Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC SECTION 2

- Technical Assessment (RP20)

[The REPORTABILITY ENGINEER will determine which questions are to be answered.]

i.

Describe the condition being evaluated for reportability:

Battery 3B007 celi1#38 was below LCO SR 3.8.106.6 administrative limit of

..13.17 VDC.

2.

Would the SSC have been able to fulfill all its intended safety function(s) as defined in the UFSAR (reference specific sections) since the failure (Operable)?

Consider all plant operating Modes, mission time, and the status of other equipment.

If yes, why?

Yes, 3B00'J battery and Cell #38 would have been able to supply the required designed safety function to support the DC bus with the required voltage and current.

LCO SR 3.8.106.6 is an administrative limit of 2.131V VDC, and is an early warning indication of the battery condition and to obtain a normal r:eli life expectancy (LCS 3.8.106.6 Bases) lhe minimum technical specification required limit for cell voltage per

[.CO 3.8.6. is 2.07 VDC.

The 2.07 VDC value is based on calculation E4C-017 which provides the minimum required voltage value for the Dattery to perform its designed safety function.

Per UFSAR section 8.3.2.1.2.1 Battery Capacity. Class 1E batteries for Irains A and B are sized for 90 minutes of operation without support of a battery charger, while batteries for Trains C and D are sized for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

By implementing the load reductions during a station blackout event, the blackout duty cycles for Batteries A and B can be met for 4 ftours per Battery Sizing Calculation E4C-017.

(on 2/25/11 cell #38 ICV was at 2.1467 VDC)

3.

if the conclusion of step 2 is

Yes, mark steps 4, 5 and 6 as UNot Npplicable,# document task performance/peer check, advance the Task to RP25 and assign to Reportability Compliance for completion of step 7, If the conclusion of step 2 is No, complete steps 4, 5 and 6.

1. When did the SSC fail or first become degraded (break, code not met, Dut of SR range, etc.)?

If the specific time of failure is not known, Print Date: 04/05/2011 Page 16 of 19

Task Details Continued SON(GS Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC is there any compelling evidence of prior failure?

N/A

5.

what was the apparent cause of the failure or degraded condition?

(use engineering judgment to determine, if necessary - but also describe the basis for your judgment),

if appropriate, generate a cause evaluation assignment.

N/A

6. Did the failure or failure mode affect or potentially affect another SSC or the other unit?

N/A

7.

[Additional Questions as indicated by the REPORTABTLTTY ENGINEER.J Prepared By:

(b)(6)

Date: 03/01/11 Peer Reviewer Comments:

Peer Reviewer:.

Date:3/3/ll After the peer review is completed, the Advance the RPT Task to RP25 and ssign to Reportability Compliance for completion of step 7.

SECTION 3 - Compliance Review and Management Approval (RP25 and RP30)

8.

Reportability assessment summary (include references as appropriate.

(To be completed by qualified individuals only - see Encode 270QC7:

Assessing Events for Reportability)

Not Reportable.

A cell on station battery 3B007 was found at 2.1160

VDC, which is below the LCO SR 3.8.106.6 administrative limit of 2.1317

VDC, and consequently failed the surveillance test.

rechnical Specification 3.8.6 "Battery Parameters," requires the batteries to be operable to support the'DC busses.

Condition A Print Date: 04/05/2011 Page 17 of 19 Print Date: 04/05/2021 Page 17 of 19

I Task Details Continued SON(GS Notification:

NN 201340427

==

Description:==

battery voltage below 2.13 VDC specifies action if minimum cell voltage is below 2.07 V.

LCS 3.8.106 "Battery Parameters,"

SR 3.8.106.6 requires a quarterly verification Pach connected cell voltage is e 2.13V.

The cell was above the TS limit but less than the LCS limit, which provides additional design margin to support the minimum battery ]ile required safeguards loads.

The requirements of LCS Condition C, for failure to pass SR 3.8.106.4 were performed as documented in TOD Task 1. Therefore, the cell as-found was above the Technical Specification limit and no report is required under 30.73(a) (2) i) (B) "Any operation or condition which was prohibited by rhe plant's Technical Specifications," or 50.73(a) (2) (v)

"Any event or 7ondition that could have prevented the fulfillment of the safety function of structures or systems that are needed to: (A) Shut down the Leactor and maintain it in a safe shutdown condition; (R) Remove residual heat; (C) Control the release of radioactive naterial; or (D) Mitigate the consequences of an accident.",

( b ) ( 6...........................

Drepared By:

L i

Date: 3-4-11 lanagement Reviewer Comments: None I(b)(6) 1anagement Reviewer:I Date: 3/16/l1.

Print Date: 04/05/2011 Page 18 of 19 Print Date: 04/05/2011 Page 18 of 19

Task Details SON( ;S Notification:

NN 201340427 Func.Loc.: S3.DCPS.3B007 125V STATION BATTERY 3B007 Location: Control Building Room:

Elevation:

Colwmn:

Task No.:

0006 Code Group: N-P21 10 CFR Part 22 Evaluation Short Text: based on charge results Task Code: P101 P21 Evaluation Created WorkCenter:

EM PES Electrical Systems Responsible: (b)(6)

Status:

TSOS Planned Start:

Planned End: 04/20/2011 Complete:

Task Long Text:

10 CPR Part 21 Evaluation

[Document below a10CFR22 Evaluation of the component defect described in the referenced Notification. Reference SOl23-XXX-3.5 for guidance on 10CFR21 applicability.

If determined to be reportable, include reference r.o reporting record Print Date: 04/05/2011 Page 19 of 19