ML121170392

Songs Notification, Ex. 7C

ML121170392
Person / Time
Site:	San Onofre
Issue date:	11/18/2010
From:	Southern California Edison Co
To:	Office of Information Services
References
FOIA/PA-2011-0157
Download: ML121170392 (12)

Text

Confidential V From Pubt'isclosure 1 CFR ý390(aJi6)

N1_111Unit 2 go So)N(;.S I(b)(7)(C)

Notification:

NN 1

Description*

j2R00b17(

Batt ery Past Operability Created on:

Jb)

Reported By:

Responsible:

b)(7)(C)

I Priority: 4 YI'Sdium Required Start: 0 Order No: 800524124 Code:

Task Exists?

[Y)

Confidential Withh~ld From PubliJlosure Pe 10 CFR 290(a)I6j System

ýitus: NOPR CRAS OS'S User Sbatus:

CRTD MRC STA ACRO 10 12:00 End: 11/18/2010 12:00 7/22/20 Func.Loc.: S2.DCPS.22007 125V STATION BATTERY 2B007 Equipment; Assembly:

Quality Class: II Location: CB Room:

Elevation:

Column:

Planner Group: Maint Electrical WorkCenter: M_CMC Nuc Const & Engrg Support-M/C Plant: 1000 SONGS - Services Reliability Classification: CRITICAL-A ARC Review Status: C Completed Feedback Req'd?

[IX M Rule:

Sig Level: 4 Low Level Issue Breakdown U]

Malfunction Start: 06/07/2010 07:05 Breakdown Duration:

H End:

==

Description:==

/

/

06/02/2010 12:01:52 1)7)(C)

1. Problem description Old 2B007 battery bank, rated at 1260 Amp-Hour (AH),

is scheduled to be replaced by 2/3BOOX battery, starting from 06/02/2010.

2B007 battery has 4 red cells in service for over 6 months now.

They are identified as cell numbers 15, 31, 40, and 43, Copper contamination causes the negative plates to appear as red and a flash light is needed to inspect them properly.

Normally, zhe boztom of the terminal post that is inside the battery jar and in contact with the electrolyte is attacked by the acid when the lead covering around the terminal post has become porous.

Fine copper particles leave the terminal post and attach themselves to the negative plates.

It is a very slow process, but the cross-section of the terminal post is reduced gradually.

During a battery discharge test, all the current flows through these terminal posts and a reduced cross-section could cause over heating and in extreme cases, meltina of the affected terminal post.

/ Last 2B007 battery service :est was performed on 01/02/2008 (ref. MO

1. 06031768).

Per Tech Spec SR 3.8,4.3, the frequency of a batzery service test for 1260 AH is every 24 months.

In June 2010, 23007 6~i

Wihl old From P "tlc 'iscosure With FrmC Notification Continued P 10C C

.390(a)6-S(ON(.;S Notification:

NN

==

Description:==

2B007 Battery Past Operability Description Continued:

battery will be replaced by 2/3B00X battery jars that are rated at 1800 AH.

A Modified Performance Test was performed on 2/3BOOX battery in May 2010 (ref. NSVO #800183271) and the battery capacity was 103.5 %.

/

/ Question here 's; How do we prove that old 2B007 battery was Operable up to now with 4 red cells in service?

/

/ I spoke with of EnerSys on 06/01/2010 morning about 4 battery jars with red cells inside.

I told him that on 06/02/2010 we will be taking 2B007 battery bank out of service for replacement with BOOX battery jars.

/

/ Question 1. Should we perform a Service Test on 2B007 battery bank now before the jars are removed to prove past Operability?

/ [j answer:

It all depends who wants to know?

I told him that I wanted to know.

His response was:

If the service test was unsatisfactory, SONGS Management has to justify past Operability.

/

/ Question 2.

If the present work schedule can not fit 2B007 battery bank Service Test now, how about testing the worst red cell #15?

/

response.

It's up to SONGS Management.

/

/ Question #3.

When should we ship all 4 red cell jars to Hays, Kansas?

/

answer:

Sooner the better.

He does not know how the copper migrates in relation to time.

/

/ Question #4.

Will EnerSys perform a service test on the red cells?

Jresponse; Most likely yes.

He is most concerned about justifying 79% Capacity at the end of the (performance) test, if that was the end result.

/

/

/ 2.

Impact or consequence

/ Weekly inspection of 4 red cells has not shown any observable degradation.

/ Irrespective of who does the service test, if the final test result is negative, then SONGS must address the past Operability concern.

Notification Continued S( )N(GS Notification:

NN (b)(7)(C)

==

Description:==

2B007 Rattery Past Operability Description Continued:

/

/

/

/

/

/

/

/

3. Describe what happened See the Problem description above.

4.

Immediate actions taken

None,

5.

Cause (if known)

Cause of red cells is unknown and its effect on the battery service test 4s unknown.

/ 6.

Recommended Actions

/ Maintenance Engineering (ME) should take the lead on evaluation of this concern, with a review by Licensing / Compliance.

They should decide if a battery service zest should be performed or not az SONGS and when.

Please note that 2B007 battery is presently isolated and ready to be removed.

ME should contact EnerSys and make arrangement for shipping 4 red cells to Kays, Kansas factory.

/ EnerSys should perform their Root Cause and battery cell discharge testing.

EnerSys should submit their official findings to SONGS.

I

/

Conflide Wi hhold From blic D losure Per 10 C 2.390(a)

Task Summary SuN(;S Notification:

NN Func.Loc.: S2.DCPS.2B007 125V STATION BATTERY 2B007 Location; CB Room:

Elevation:

Column:

Sort No.:

Sort No.:

0001 0002 Code Group:N-TS-IOD Immediate Operability Determination Short Text: see long text Task Code: N045 IOD-Equipment Restored to Operable WorkCanter:

Responsible:

Code Group:N-EOC Extent of Condition Assessment Short Text:

Task Coder E010 Provide Initial Estimate WorkCenter: M cCqA & Engrg Support-M/C Responsible: Ib)(7)(C)

Code Group:N-RPT Reportability Assessment Short Text:

Task Code: RP20 RPT Engineering review WorkCenter:

EM EE Elect'-ical Engrg Responsible :

Code Group:N-SPT General Support Record Short Text: Evaluate request&provide recommendation Task Code: STDl SPT CREATED WorkCenter: 0 CMC Nuc Const & Engrg Support-M/C Responsible: (b)(7)C)

Sort No.:

0003 Sort No.:

0004 Conf'd i

W hhold From ublic Disclosure te 10 R 2.3190

)(6)s

Trending Worksheet SON(GS Notification:

NN

[(b)(7)(C)

Funo.Loc.: S2.DCPS.22007 125V STATION BATTERY 23007 Part:

Damage:

Ca.se:

Activi.ty:

Par-:

Damage:

Cause:

Activity:

Part:

Damage:

Cause:

Activity:

Part:

Damace:

Cause:

Activity:

With Confide Withhold From P lic Di osure P 0 OCF 2.390(a)(

Pe' 0

39, J

Task Details SONG."S Notification:

NN (b)(7)(c)

Func.Loc.: S2.DCPS.2B007 125V STATION BATTERY 2B007 Location; CB Room:

Elevation:

Column:

lank nptailn, Sort No.:

0001 Code Group: N-TS-iOD Immediate Operability Determination Short Text: see long text Task Code; N045 IOD-Equipment Restored to Operable WorkCenter; Responsible:

Status:

TSCO I( R7)(C)

Planned Start:

Planned E d d

1(b)(7)(C)

Complete:I(b)()(C)

Task Long Text:

NOTES:

1) Parts I through 4 will be completed by the STA,

2) PartS may be completed by Operations (STA) or Engineering (Responsible Engineer) when the SSC has been restored to a fully qualified status. IOD (Immediate Operability Determination)

This is an Immediate Operability Determination (IOD).

1. Deficiency Identified and the Affected Functional Location:

2. Identify the Specified Safety Function(s); include mission time (if applicable):

3.

Conclusion:

Determine OPERABLE/INOPEPRBLE Operable Inoperable Basis (provide discussion):

Confiden -I W hold From p lic Dis sure er 10 CF

.390(a)(6os

Task Details Continued SOMI NN

~b~j(C)ý Notification:

NN j

==

Description:==

2B007 Battery Past Operability NOTE: Address the question: "Does the degraded or nonconforming condition currently exist on the other train/unit?"

a) Ras an EOC Task been created to address the extent of condition (YES or NO)?

b) If no EOC Task has been created, describe "other train/other unit" findings (if performed) cr indicate N/A (if no-necessary).

5.

IOD Closure Information The battery has been removed from 2DI and will never be used again.

An RPT assignment has been generated.

(b)(7)(C)

Confidenyp I Withhc d From Plic Discf sure Pe 10 CF

.3 90(a)()

Per Task Details S,(N(CS Notification;:

NN Func.Loc.: S2.DCPS.2B007 Location: CB I (b)(7)(C) 125V STATION BATTERY 2B007 Room:

Elevation:

Column:

Tank nptaila-Sort NO.:

0002 Code Group: N-EOC Extent of Condition Assessment Short Text:

Task Code:

E01Q Provide Initial Estimate WorkCenter; M CMC Nuc Const & Engrg Support-M/C Responsible:

=

I Status; TSR6 Planned Start:

Planned End:

Complete-Task Long Text:

EOC (Extent of Condition Assessment)

Perform an Extent of Condition {EOC) evaluation for an identified deficiency to determine if the deficiency currently exists elsewhere. Do not use this method to determine cause; use a DCE, ACE or RCE as appropriate to determine the cause.

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

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

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

1. Affected Equipment !See deficiency description or, if the deficiency description is incomplete or incorrect, describe)

This EOC is limited to battery bank 2B007 which is no longer installed in the plant.

2..Deficiency Identification (See description or, if tzhe description is incomplete or incorrect, describe)

Old 2B007 battery bank, rated at 1260 Amp-Hour (AH), is replaced by 2/3300X

battery, starting from 06/02/2010.

• a.

4 2e

ri i

service f, c,

mrozt:h nov The"-

scheduled to be 2B007 battery r.id->-if-÷-

Task Details Continued SON(GS Notification:

N (C)

==

Description:==

2B007 Battery Past Operability negative plates to appear as red and a flash light is needed to inspect them properly.

Normally, the bottom of the terminal post that is inside the battery jar and in contact with the electrolyte is attacked by the acid when the lead covering around the terminal post has become porous.

Fine copper particles leave the zerminal post and attach themselves to the negative plates.

It is a very slow process, but the cross-section of the terminal post is reduced gradually.

During a battery discharge test, all zhe current flows through these terminal posts and a reduced cross-section could cause over heating and in extreme cases, melting of the affeczed terminal post.

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

Confide la Wlthh d From P blic clos re Pe10CF 2.390(a)

I Confillepnlj~

(b)7)C)R.()

10 Task Details Notification:

NN L

J Func.Loc.: S2.DCPS.2B007 125V STATION BATTERY 2BD07 Location: CB Room:

Elevation:

Column:

Sort No.:

0003 Code Group: N-RPT Reportability Assessment Short Text:

Task Code: RP20 RPT Engineering review WorkCenter:

EM EE Electrical Engrg Responsible: ' =1 1111 c Status:

TSRL-Planned Start:

Planned End: 07/02/2010 Complete; Task Long Text:

REPORTABILITY ASSESSMENT TEMPLATE NOTE: Timely assessment for reportability consideration is important.

RPT assignment due date as a function of priority is as follows based on system defaults: Pri 2/3A (7 days),

Pri 3B (30 days),

Pri 3C (60 days)

Reference Procedure S0123-XV-3.3, NRC Reporting Requirements and Assessments.

Questions 1 through 4 and Engineering Peer Review, to be performed by Engineering.

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

An SSC can be considered "failed when found" only iftfhere is no compelling evidence of earlier failure.

2.

What was the apparent cause (use engineering judgment to determine, if necessary - but,:4a*so describe the basis for your judgment) of the failure or dejraded condition?

If appropriate, generate a cause evaluation assignment.

3.

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 and the

Task Details Continued

.S 0 N Totification:

NN

==

Description:==

23007 Battery Past Operability

4.

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

Engineering Peer Review (comments):

Engineering Peer Review performed by;

5.

(BY Encode qualified personnel - see Encode 270QC7: Assessing Events for Report-ability) Reportability assessment summary (include referenoes as appropriate):

Confidential Wlthh tId From Publ *iscloe P 10! PUN

ý10( re P10 CFR2> g(a)(6)

Task Details SONG;S Notification:

NN (c)

Func.Loc.: S2.DCPS,2B007 125V STATION BATTERY 2B007 Location: CB Room:

Elevation:

Column:

Sort No.:

0004 Code Group; N-SPT General Support Record Short Text: Evaluate request&provide recommendation Task Code; ST01 SPT CREATED WorkCenter: M CMC Nuc Const & Engrg Support-M/C Responsible:(b7))

Status:

TSR-Planned Start; 06/03/2010 12:02 Planned End: 11/18/2010 12:00 Complete:

Task Long Text:

SPT (General Support Record)

Describe the General support request:

Confidential With old From Public sure Pr10 CFýROa)6)