ML20117J049

At&T Round Cell Nuclear Util User'S Council Charter

ML20117J049
Person / Time
Site:	Mcguire, Palo Verde, Wolf Creek, Oyster Creek, Braidwood, McGuire
Issue date:	05/08/1996
From:	External (Affiliation Not Assigned)
To:
Shared Package
ML20117J028	List: ML20117J026 ML20117J049
References
NUDOCS 9605300096
Download: ML20117J049 (16)

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4 i ENCLOSURE 1 i

) AT&T ROUND CELL NUCLEAR UTILITY USER'S COUNCIL CHARTER l

4 9605300096 960515 PDR ADOCK 05000219 P PDH j

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l CHARTER l I

DATE; May 8,1996 TITLE: AT&T Round Cell Nuclear Utility User's Council REVISION: 0 CHAIR: Duke Power MEMBERS: LucentTechnologies Arizona Public Service Comed (Commonwealth Edison)

Duke Power Company GPU Nuclear ,

Wyle Laboratories Wolf Creek Nuclear Operating Corporation PURPOSE AND SCOPE: <

The purpose of the User's Council is to bring together knowledge and experience of AT&T l Lineage 2000 Round Cell Batteries in order to address immediate industry and regulatory concerns of performance and behavioral chameteristics that have evolved from recent testing and i operating experience. Long term, the team will collectively work to resolve questions and issues l

that are unique to Nuclear Utility applications and address applicability of IEEE standards.

OPERATING AGREEMENT:

The Council shall conduct business using Robert's Rules of Oitler. Group positions and rulings shall be established by consensus of majority members present at meetings. Urgent issues will be I

resolved between meetings utilizing written correspondence and balloting of active members.

EXPECTATIONS:

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1. Evaluate charging methods for high specific gravity Round Cells

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• Available battery capacity following Performance Test recharge

• Available battery capacity following an unplanned discharge on-line l

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2. Identify and resolve concems that apply to Standard Technical Specifications

3. Identify and determine applicability ofIEEE Standards l

4. Review historical prob; ems and lessons learned .

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5. Develop position on testing and correlation of intemal cell impedance / resistance to cell j performance l l

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6. Investigate performance and behavioral characteristics of high and low specific Round Cells

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( 7. Establish communication between member and methods of data pooling l 8. Investigate root cause(s) of Palo Verde and Braidwood battery capacity loss MILESTONES GOALS:

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+ Next Meeting in Charlotte, NC -5/22 & 23/96 )

+ - Issue report documendng results of recharge testing - Approx. 9/96 l l + Issue root cause reports for Palo Verde and Braidwood battery - Approx. 9/96 loss of capacity

+ Issue repon addn:ssing cellimpedance/ resistance testing Vs cell - Approx.10/96 performance

• Establish group position on applicability ofIEEE Standards - Fall 96 IEEE Mtg

! and present to IEEE Standards Board

+ Document position and basis of Standard Technical Specification - AfterIEEE Mtg issues t

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Charter Attachment Page 1 of 8 Expectations Discussion / Action / Sponsor / Completion Date 1, Evaluate charging methods for high specific gravity Round Cells

• Available battery capacity following Performance Test recharge  :

Discussion: Discharge testing has indicated that 100% capacity is not available immediately following recharging after a battery Performance Test. In order to fully 1

understand this phenomenon, additional testing may need to be performed to determine the characteristics of constant current and constant potential charging.

l Action: Evaluate and compare both constant current and constant potential charging.

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+ Available battery capacity following an unplanned discharge on-line l

Discussion: After en unplanned discharge on-line, plants will use their permanent plant constant potential chargers at float potential to charge the batteries. An issue has been raised concerning the charge retum rate using this method of charging and the available safety margin. i I

Action: Evaluate effectiveness of constant potential charging at float voltage following an on-line discharge. Determine rate of charge retum and evaluate safety margin over accident. duty cycle.

1 Sponsor: APS )

Completion Date: Preliminary - Appmx.6/96 Final - Approx. 9/96

Chaner Attachment Page 2 of 8 Expectations Discussion / Action / Sponsor / Completion Date

2. Identify and provide recommendations to resolve concerns that apply to Technical Specifications Discussion: With the unique characteristics of AT&T Round Cells, generic parameters and Surveillance Requirements need to be evaluated for applicability.

Action: Review Standardized Technical Specification for applicability. Document positions and basis.

Sponsor: APS Completion Date: (90 days following resolution of IEEE 450 issue) l l

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Charter Attachment Page 3 of 8 Expectations Discussion / Action / Sponsor / Completion Date

3. Identify and determine applicability ofIEEE Standards IEEE Std. 450 Discussion: Due to the unique design and characteristics of AT&T Round Cells, clarification ofIEEE Std. 450 is required.

Action: Request a Standards interpretation based on data submitted from User's Council.

l l IEEE Std 485 l

Discussion: IEEE Std. 485 is normally used for sizing (including various margins) lead-l acid batteries used at Nuclear Stations. Due to unique design and characteristics of '

l AT&T Round Cells, clarification of IEEE Std. 485 is required.

Action: Request a Standards interpretation based on data submitted from User's Council.

Sponsor: Comed l

l Completion Date: (Request submitted prior to fall 96 IEEE Working Group meeting)

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Charter Attachment Page 4 of 8 Expectations Discussion / Action / Sponsor / Completion Date

4. Review historical problems and lessons learned Discussion: Significant problems and lessons leamed during service need to be shared wSh the group from both a historical perspective and on-going basis.

Action: Research problem history and record on-going problems and lessons leamed.

Solicit input and share with the group.

Sponsor: GPUN i Completion Date: Initial Rollout Approx.6/96 l

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s Charter Attachment Page 5 of 8 l Expectations Discussion / Action / Sponsor / Completion Date

5. Develop position on testing and correlation ofinternal cell impedance / resistance to cell performance Discussion: Comed, Braidwood Nuclear Station has been taking intemal cell impedance measurements on designated strings of Round Cells and comparing values with battery Performance Test results. The emphasis is to establish a correlation between cell impedance and capacity. This testing also explores the effect of entrapped gases genemted during charging on cell impedance.

1 Action: Document test results and determine validity of correlation and benefits of i impedance testing. I Sponsor: Comed Completion Date: Approx.10/96 l

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Charter Attachment Page 6 of 8 Expectations Discussion / Action / Sponsor / Completion Date

6. Investigate performance and behavioral characteristics of high and low specific gravity Round Cells Discussion: Recent problems and abnormalities of Round Cells have been limited to those with high specific gravity electrolyte. The effects of high specific gravity electrolyte on performance and behavioral characteristics are not fully understood.

Action: Investigate performance and behavioral characteristics of high and low specific gravity cells. Determine and document differences of each.

Sponsor: WolfCreek Completion Date: Approx. 4/97 t l l

o 1 Charter Attachment Page 7 of 8 Expectations Discussion / Action / Sponsor / Completion Date

7. Establish communication between members and methods of data pooling Discussion: With national participation, the User's Council member locations are such that frequent meetings are impractical. In order to share ideas and data, a more direct method of communication is needed. ,

Action: Develop a network between Council members using the Intemet, that will provide convenient distribution of correspondence, information, and test data. Method should be fast, simple and convenient such that frequent correspondence and sharing of data is encouraged.

Sponsor: Duke Power Completion Date: Approx. 6/96 i

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l Charter Attachment  !

Page 8 of 8 Expectations Discuss, ion / Action / Sponsor / Completion Date

8. Investigate root cause(s) of Palo Verde and Braidwood battery capacity loss Discussion: Recent Performance Tests of Round Cell batteries at Palo Verde Unit 2 and

Braidwood Unit I have indicated unexpected and premature loss of capacity. Root cause evaluations at each station are ongoing. The results of these evaluations should be reviewed and shared such that lessons are learned and applied to develop a better understanding of Round Cell behavior.

Action: Investigate root cause(s) of capacity loss and evaluate results.

Sponsor

APS/ Comed Completion Date: Approx. 9/96 l

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ENCLOSURE 2 BATTERY IN PLANT SURVEILLANCE TEST DATA

SUMMARY

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i McGuire Batterv A Service Test 8/12/91 Passed Performance Test 3/16/93 101 %

l Service Test 6/22/93 Passed Service Test 12/28/94 Passed Batterv B '

Service Test 6/2/92 Passed Service Test 3/21/94 Passed Performance Test 12/31/94 106 %

Service Test 10/18/95 Passed i Battery C Service Test 8/26/91 Passed l Performanco Test 3/23/93 100 %

Service Test 7/7/93 Passed Service Test 1/23/95 Passed Batterv D Service Test 6/16/92 Passed .

Service Test 3/7/94 Passed Performance Test 11/14/94 108%

l Service Test 12/11/95 Passed Oyster Creek l

Batterv B Service Test 1/14/93 Passed Performance Test 11/24/94 97.5 %

Service Test 11/24/94 Passed Wolf Creek No operationa! testing to date.

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4 Braidwood Unit 1 Batterv 111 Service Test 3/94 Passed Modified Performance Test 10/95 112 %

Batterv 112 Service Test 4/94 Passed Modified Performance Test 10/95 92% ,

Service Test 11/95 Passed Single CellTests (3) 3/96 <65%

Service Test 3/96 Passed Service Test (Replacement Cells) 3/96 Passed Braidwood Unit 2 Batterv 211 Service Test 10/94 Passed Modified Performance Test 3/96 112.5 %

Batterv 212 Service Test 10/94 Passed Modified Performance Test 4/96 112 %

Palo Verde Unit 1 l l

Batterv A  !

l Service Test 3/92 Passed l Performance Test 9/93 108.6 %  !

Service Test 4/95 Passed Battery B Service Test 4/92 Passed Performance Test 10/93 105.4 %

Service Test 4/95 Passed l

4 Battery C -

Service Test 3/92 Passed Performance Test 9/93 105.9 %

Service Test 4/95 Passed Battery D Service Test 4/92 Passed Performance Test 10/93 106.6 %

Performance Test 4/95 107.4 % I I Palo Verde Unit 2 l Batterv A l Service Test 5/93 Passed Performance Test 9/94 91.6 %

l Performance Test (Replacement 3/96 106.7 %

Cells)

Battery B Service Test 5/93 Passed Performance Test 1/94 100.0 % !

Performance Test 9/94 89.0 %

Batterv C Service Test 5/93 Passed Performance Test 9/94 90.6%

Performance Test (Replacement 3/96 88.6 %

l Cells) j Batterv D i Service Test 5/93 Passed Performance Test 1/94 100.0 %

Performance Test 9/94 88.3 %

r Palo Verde Unit 3 Battery A -

Service Test 10/92 Passed -

Performance Test 4/94 105.6 %

Service Test 10/95 Passed Battery B Service Test 10/92 Passed Performance Test 3/94 110.0 %

Service Test 10/95 Passed Batterv C Service Test 10/92 Passed Performance Test 4/94 109.2 %

Service Test 10/95 Passed Battery D  !

1 Service Test 10/92 Passed Performance Test 3/94 112.9 %

Service Test 10/95 Passed l

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