ML20196E724

Summary of 881130 Meeting W/Util in Rockville,Md Re Cable Separation.Attendance Roster & Viewgraphs Encl

ML20196E724
Person / Time
Site:	Browns Ferry
Issue date:	12/06/1988
From:	Moran D NRC OFFICE OF SPECIAL PROJECTS
To:	NRC OFFICE OF SPECIAL PROJECTS
References
NUDOCS 8812120068
Download: ML20196E724 (15)

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December 6, 1988

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Docket Nos. 50-259/260/296 LICENSEE: Tennessee Valley Authority FACILITIES: Browns Ferry Nuclear Plant, Units 1, 2 and 3

SUBJECT:

BROWNS FERRY CABLE SEPARATION The staff met with TVA in One White Flint North, Conference Room 10-B-13, on

_ November 30, 1988 at 1:00 p.n. The meeting notice and attendance roster are Enclosures 1 and 2. TVA's presentation (Enclosure 3) explained the issue, which was identified in LER-032, Revision 0 dated October 21, 1988. TVA engaged in a CAQR analysis and discovery effort to determine the extent of discrepancies and possible violations in cable separations. TVA enumerated the results of their discovery which involved reviewino 1300 cables, and identified 242 discrepancies. TVA's presentation and subsequent discussion with the staff established that TVA should make a submittal in the next few days. This submittal would provide a plan with a schedule of the steps TVA believes are necessary to close the issue. The submittal would also include TVA's analysis justifying their contention-that it is safe to rnove fuel with known deviations in cable separation. The staff promised to review this submittal and provide TVA with a staff position in a timely fashion.

Original signed by David H. Foran, Project Manager TVA Projects Division Office of Special Projects

Enclosures:

1. Meeting notice for Nc"ember 30, 1988 meeting

2. Attencece list

3. TVA's presentation cc w/ enclosure:

See next page DISTRIBUTION tDoetet m e.

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'Mr. Oliver J. Kingsley, Jr. Browns Ferry Nuclear Plant cc:

General Counsel Regional Administrator, Region II Tennessee Valley Authority U.S. Nuclear Regulatory Commission 400 West Summit Hill Drive 101 Marietta Street, N.W.

Eli B33 Atlanta, Georgia 30323 Knoxville, Tennessee 37902 Resident Inspector / Browns Ferry NP Mr. R. L. Gridley U.S. Nuclear Regulatory Commission Tennessee Valley Authority Route 12, Box 637 SN 157B Lookout Place Athens, Alabama 35611 Cha'tanooga, Tennessee 37402-2801 Mr. C. Mason Dr. Henry Myers, Science Advisor Tennessee Valley Authority Comittee on Interior Browns Ferry Nuclear Plant and Insular Affairs P.O. Box 2000 U. S. House of Representatives Decatur, Alabama 35602 Washington, D.C. 20515 Tennessee Valley Authority Mr. P. Carier Rockville Office Tennessee Valley Authority 119?1 Rockville Pike Browns Ferry Nuclear Plant Suite 402 P.O. Box 2000 Rockville, Maryland 20852 Decatur, Alabama 35602 Mr. D. L. Williams Mr. Oliver D. Kingsley, Jr.

Tennessee Valley Authority Senior Vice President, Nuclear Group 400 West Summit Hill Drive Tennessee Valley Authority W10 885 6N 38A Lookout Place Knoxville, Tennessee 37902 1101 Market Street Chattanoops, Tennessee 37402-2801 Chairman, Limestone County Commission P.O. Box 188 Athens, Alabama 35611 Claude Earl Fox, M.D.

State Health Offi~ '

State Departme' blic Health State Office Bu, Montgomery. Alabau 36130 m

Enclosure 2_

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TVA/NRC MEETING BROWNS FERRY NUCLEAR PLANT ELECTRICAL CABLE SEPARATIONS Rockville, Maryland November 30, 1988 I. INTRODUCTION TVA (Pat Carier)

II. PRESENTATION o Background J. Hutson o Nuclear Safety Aspects B. Crouch o Operational Assessment G. Campbell III. DISCUSSION IV. SUhMARY

BFN ELECTRICAL CABLE SEPARATIONS BACKGROUND

• SEPAR ATION CRITERIA

- FSAR SECTION 8.9 AND SYSTE'M DESIGN CRITERI A

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- PRE-REGULATORY GUIDE 1.75

• IDENTIFICATION OF ISSUE

- CAQs

- LER

• DISCOVERY EFFORT

- REVIEW BY VOLTAGE LEVEL AND TYPE

- SAMPLE AND 100% REVIEW N OV 30,1988

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BFN ELECTRICAL CABLE SEPARATIONS i

PLANT CONDITIONS e 4+ YEAR OUTAGE ,

a REFUEL MODE ,

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- VESSEL HYDRO f l

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BFN ELECTRICAL CABLE SEPARATIONS i

ACCIDENTS / EVENTS

• FUEL HANDLING ACCIDENT (BUNDLE DROP)

• LOSS OF COOLING .

. FUEL POOL / REACTOR CAVITY DRAINING l L

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BFN ELECTRICAL CABLE SEPARATION ,

l COMMON MODE HAZ ARDS - TECHNICAL EVALU ATION 1

. EQUIPMENT QUALIFICATION -

l NO HARSH ENVIRONMCNTS

• SElSMICALLY QUALIFIED RACEWAYS

• FIRE PROTECTIO 1 PROGRAM

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N OV 30,1988  ;

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BFN ELECTRICAL CABLE SEPARATIONS SPURIOUS VALVE OPER ATIONS

. REVIEW OF DRAIN PATHS

. MINIMUM OF TWO VALVES IN SERIES CON CLU,.LQE i NO CREDlBLE DRAIN PATH r

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BFN ELECTRICAL CABLE SEPARATIONS

SUMMARY

• LOW D EC AY HE AT (< 0.4 M W )

• L ARG E M ASS OF WAT E R

• NO CREDIBLE DRAIN PATH

• SLOW TRANSIENTS

• DIVERSE EQUIPMENT CONCLUSfQB SUFFICIENT TIME AND ALTFRN ATE EQUIPMENT AVAILABLE NOV 30,198 8

BFN ELECTRICAL CABLE SEPARATIONS LOSS OF FUEL POOL COOLING e 3 YEAR DECAY ASSUMED e LARGE VOLUME OF WATER

+ LUMP M ASS e N O H E AT LOSS CONCLUSION TIME REQUIRED IN EXCESS OF REGUI / TORY GUIDE 1.27 REQUIREMENTS i

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BFN ELECTRICAL CABLE SEPARATIONS '

FUEL H ANDLING ACCIDENT - OFFSITE DOSE

• FAILURE TO ISOLATE l

• GROUND LEVEL RELEASE -

• 11/2 YEAR DECAY ASSUMED e NO IODINE PRESENT I

e KRYPTON 85 - lNERT QONCLUSION t, DOSE APROX.1/1000 OF 10CFR100.11 t

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BFN ELECTRICAL CABLE SEPARATIONS F_UEL HANDLING ACCIDENT - CONTROL ROOM DOSE

• FAILURE TO ISOLATE

• GROUND LEVEL RELEASE

• 2 YEAR DECAY ASSUMED

+ NO IODINE PRESENT

• KRYPTON 85 - INERT CONCLUSION DOSE APROX.1/300 OF 10CFR20.101 &

10CFR50 APPENDlX A i

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N OV 30,1988 l

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BFN ELECTRICAL CABLE SEPARATIONS VESSEt. HYDRO LOSS OF COOLING EVENTS _

. LARGE VOLUME OF WATER

. MULTIPLE FLOODING SYSTEMS AVAILABLE RPV DR AINING

. MULTIPLE VALVES AVAILABLE

• NO CREDIBLE DRAIN PATH l

NOV 30,198 i

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1 BFN ELECTRICAL CABLE SEPARATION I

CONCLUSION

• POSTULATED ELECTRICAL FAILURES RESULTING FROM IMPROPER CABLE SEPARATIONS DO NOT IMPOSE UNDUE RISK -

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s Enclosure 1 UNITE 3 STATES

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NUCLEAR REGULATORY COMMISSION j WASHINGTON, D. C. 20S55

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9 November 23, 1988 4, [

Docket Nos. 50-259/260/296 MEMORANDUM FOR: Suzanre Black, Assistant Director for Projects TVA Pro,iects Division Office of Special Projects FROM: David H. Foran, Project Manager TVA Proiects Division Office of Special Pro.iects

SUBJECT:

BROWNS FERRY CABLE SEPARATION Date & Tine: Wednesday, November 30, 1988 1:00 - 4:00 p.m. -

Location: One White Flint North 11555 Rockville Pike Rockville, Paryland 20852 10-B-13

Purpose:

TVA presentation on issue resolution, especially with respect to fuel reload.

Participants *: NRC TVA G, Gears C Willians, et al A. Marinos

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av . P r n, j b ger TVA Projects Diviston Office of Special Projects cc: See next page

• Feetiras betwaen NRC technical staff and aoplicants for licenses are noen

'or interested corbers o' the public, petitionars, intarvenors, nr other carties to attend as observers pursuant to "oper Meetings and Statenent of NDC Staff Policy," 43 Faderal Oacistar 759, 6/?A/7o.

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Browns Ferry Nuclear Plant Regional Administrator, Region II eral Counsel U.S. Nuclear Regulatory Commission Tennessee Valley Authority 101 Marietta Street, N.W.

400 West Summit Hill Drive Atlanta, Gaorgia 30323 Eli 833 Knoxville, Tennessee 37902 Resident Inspector / Browns Ferry NF ffr. R. L. Gridley U.S. Nuclear Regulatory Comission Tennessee Valley Authority ^oute 12. Box 637 SN 1578 Lookout Place Athens, Alabama 35611 Chattanooga, Tennessee 37402-2801 Mr. C. Mason Dr. Henry Myers, Science Advisor Tennessee Valley Authority Committee on Interior Browns Ferry thclear Plant and Insular Affairs P.O. Box 2000 U. S. House of Reoresentatives Decatur, Alabama 35602 Washington, D.C. 20515 Tennessee Valley Authority Mr. P. Carier Rockville Office Tennessee Valley Au+.hority 11921 Rockville Pike Browns Ferry Nuclear Plant Suite 402 P.O. Box 2000 Rockville, Maryland 20852 Decatur, Alabama 35602 Nr. D. L. Williams Mr. Oliver D. Kingsley, Jr.

Tennessee Valley Authority Senior Vice President, Nuclear Power 400 West Summit Hill Drive Tennessee Valley Authority W10 Br5 6N 38A Lookout Place Knon ille, Tennessee 3790? 1101 Market Street Chattarooga, Tennessee 3'< < 02-2801 Chairman, Limestone County Commission P 0. Box 188 Athens, Alabama 35611 Claude Earl Fox, M.D.

State Fealth Officer State Department of Public Health State Office Building Montaomery, Alabama 36130

ENCLOSURE AGENDA TVA/NRC MEETING NOVEMBER 30, 1988 - ROCKVILLE, MARYLAND ,

BROWNS FERRY NUCLEAR PLANT ELECTRICAL SEPARATIONS l

I. INTRODUCTION TVA/NRC II. PRESENTATION TVA

• RACKGROUND TECHNICAL ASSESSMENT NUCLEAR SAFETY ASPECTS CONCLUSION III. DISCUSSION TVA/NRC I

i IV.

SUMMARY

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