ML20125D034

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Summary of 921015 Meeting W/Util in Rockville,Md Re Util Plans for Conducting Expanded IPE for Plant.List of Attendees & Meeting Handouts Encl
ML20125D034
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 12/02/1992
From: Hebdon F
Office of Nuclear Reactor Regulation
To:
Office of Nuclear Reactor Regulation
References
NUDOCS 9212140236
Download: ML20125D034 (12)


Text

- .

Decket Nos. 50-259,4 50-260 and 50-296- .

December 2, 1992 l LICENSEE: Tennessee Valley Authority FACILITY: Browns Ferry Nuclear Plant, Units 1, 2, and 3

SUBJECT:

SUMMARY

0F A MEETING WITH THE LICENSEE REGARDiMG EXPANDED l INDIVIDUAL PLANT EXAMINATIONS l On October 15, 1992, representatives of the Tennessee Valley Authority (TVA) i met with the NRC staff in Rockville, Maryland, to discuss TYA's plans for j conducting an exWnded Individual Plant Examination (IPEl for all three units  !

of the Browns Ferry Nuclear Plant (BFN). The principal purpose of this -1 meeting was to brief the staff on how TVA intended to address certain comments raised by the staff at a previous meeting held on May 28, 1992. These comments were subsequently documented in a letter to TVA dated July _22, 1992.

This letter also provided the results of the staff's preliminary review of TVA's proposed approach for conducting a multi-unit IPE, as described in their submittal of February 7, 1992. In both the meeting and the July 22, 1992 letter, the staff's comments centered around certain assumptions inherent in TVA's proposed approach, such as: (1) operation of three units represents a bounding plant configuration, (2) ten selected shared systems are sufficient to scope all significe t vulnerabilities, and (3) severe accident analysis is limited to two selected initiating events. TVA was requested to provide detailed justifications for these assumptions with their expanded IPE submittal, which is scheduled for the end of 1993.

Meeting attendees are listed in Enclosure 1. A copy of TVA's presentation handouts is provided as Enclosure 2. In general, TVA took this opportunity to discuss with the staff its interpretation of ti e comments documented in the July 22, 1992 letter and to present its anticipated. response to these comments. By the end of the meeting, all parties involvi.d concluded that a sufficient level of mutual understanding had been reached and that TVA appeared to be heading in the right direction.

Original signed by Frederick J. Hebdon, Project Director Project Directorate II-4 Division of Reactor Projects - 1/II, NRR

Enclosures:

1. Attendees
2. Agenda cc w/ enclosures:

See next page OFC PDII-4/LA PDil-4/PM.- PDII-4/fM PDIlr4/PD NAME MSandersfrd TRoss:dw JWillibs/m FHdf/ don DATE 11/ { /92 11/P/92 n/v/92 il / L/92 l

9212140236 921202 9 DR ADOCK 0500

Ag $

Browns Ferry Nuclear Plant-Cc' Mr. John B. Waters, Chairman State Health Officer Tennessee Valley Authority Alabama Dept. of Public Health ET 12A 434 Monroe Street 400 West Summit Hill Drive Montgomry, Alabama 36130-1701 Knoxville, Tennessee 37902 Mr. J. R. Bynum, Vice President Regional Administrator Nuclear Operations U.S.N.R.C. Region II 38 Lookout Place 101 Marietta Street, N.W.

1101 Market Street Suite 2900 Chattanooga, Tennessee 37402-2801 Atlanta, Georgia 30323 Mr. Charles Patterson Site Licensing Manager Senior Resident Inspector Browns Ferry Nuclear Plant Browns Ferry Huclear Plant Tennessee Valley Authority U.S.N.R.C.

P.O. Box 2000 Route 12, Box 637 Decatur, Alabama 35602 Athens, Alabama 35611 Mr. O. J. 7eringue, Vice President Site Quality Manager Browns Ferry Nuclear Plant Browns Ferry Nuclear Plant Tennessee Valley Authority Tennessee Valley Authority P.O. Box 2000 P. O. Box 2000 Decatur, Alabama 35602 Decatur,-Alabama 35602 Mr. M. J. Burzynski, Manager Dr. Mark 0. Medford, Vice President Nuclear Licensing and Regulatory Affairs s e, Licensing & Fuels SB Lookout Place he ea 99 Chattanooga, Tennessee 37402-2801 1101 Market' Street Chattanooga, Tennessee 37402-2801 TVA Representative Tennessee Valley Authority 11921 Rockville Pike Suite 402 Rockville, Maryland 20852 General Counsel Tennessee Valley Authority ET 11H 400 West Summit Hill Drive Knoxville, Tennessee 37902 Chairman, Limestone County Commission P.O. Box 188 Athens, Alabama 356U

)'

DISTRIBUTION

Docket or Centril-File NRC & Local PDRS 8FN Rdg. File T. Murley/F. Miraglia 12-G-18 J. Partlow 12-G-18 F. Hebdon T. Ross J. Williams OGC 15-B-18 E. Jordan MNBB-3701 W. Beckner 10-E-4 R. Hernan 14-C-7 ACRS(10)

L. Plisco 17-G-21 E. Merschoff RII D. Wheeler 12-D-22 J. Flack Nl.S-324 E. Rodrick NLS324 J. Schiffgens 10-E-4 09003'J

.g,* Enclosure 1 ATTENDEES flEQWNS FERRY EXPANDED INDIVIDUAL PLANT EXAMINATION MEETING OCTOBER 15.-1992 Ramg Oroanization Thierry Ross NRR/PDIi-4 William Beckner NRR/SPSB John Schiffgens NRR/SPSB Ron Hernan NRR/ POI-4 Paul Ullogg Region II (Phone conferee)

Duke Wheeler RES/SAIB John Flack RES/SAIB Ed Rodrick RES/SAIB Greg Pierce TVA/BFN Licensing Mike hellums TVA/ Corporate Licensing Henry Jones TVA/BFN Engineering Richard McMahon TVA/ Corporate PRA

~ ENCLOSURE 2 , _

AGENDA' FOR TVA/NRC MEETING OCTOBER-15, 1992 EXPANDED INDIVIDUAL PLANT EXAMINATIONS FOR BROWNS FERRY L TOPIC SPOKESMAN-

-BACKGROUND G. D. PIERCE

' .fRC COMMENTS '(NRC's 7/22/92-LETTER) H.- L. JONES RESPONSE-T0 NRC COMMENTS H. L. JONES CONCLUSION G. D. PIERCE

-l 9

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TVA/NRC MEETING OCTOBER 15, 1992 EXPANDED INDIVIDUAL PLANT EXAMINATIONS.FOR BROWNS FERRY TOPIC SPOKESMAN BACKGROUND G. D.-PIERCE O

O E

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j. ,, _ ___

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TVA/NRC MEETING OCTOBER 15, 1992 EXPANDED INDIVIDUAL PLANT EXAMINATIONS FOR BROWNS FERRY c

TOPIC SPOKESMAN-NRC COMMENTS (NRC's 7/22/92 LETTER) H. L. JONES

.' UNITS 1 AND 3 SUFFICIENTLY SIMILAR.TO UNIT 2 SUCH THAT UNIT 2 IPE IS' APPLICABLE TO UNITS 1 AND 3 1

-. . SIGNIFICANT VULNERABILITIES ENVELOPED BY THE ANALYSIS OF THE TEN SHARED SYSTEMS SYSTEMATIC EVALUATION OF SHARED SYSTEMS AND ,

BASIS FOR ELIMINATION

. ANALYSIS LIMITED TO TWO INITIATING EVENTS i -

BASIS FOR ELIMINATING ANY INITIATORS

. EFFECT OF SHUT DOWN-UNITS ON OPERATING UNITS k

9

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m' " - ,ew u_ -2_ m- -a e _s

..W.-

TVA/NRC MEETING '

OCTOBER 15, 1992 EXPANDED INDIVIDUAL PLANT-EXAMINATIONS FOR BROWNS FERRY I

TOPIC SPOKESMAN-RESPONSE TO NRC COMMENTS H. L. JONES COMMENT: UNITS 1 AND 3 SUFFICIENTLY SIMILAR TO UNIT 2 SUCH THAT UNIT 2 IPE IS APPLICABLE TO UNITS I AND 3 .

RESPONSE: . ALL THREE UNITS HAVE A HIGH DEGREE OF SIMILARITY AND SHARE A COMMON FSAR OVERALL' REGULATORY FRAMEWORK FOR UNITS 1

AND 3 IS BASED ON SIMILARITY IN PLANT CONFIGURATION AND' REQUIRED CORRECTIVE
ACTIONS I - DESIGN BASELINE PROGRAM FOR UNITS 1 AND 3.

WILL1 VERIFY CRITERIA ARE ADEQUATE AND

~

PROPERLY IMPLEMENTED' PRIOR TO THE

. . RESTART OF EACH: UNIT

- DIFFERENCES:BETWEEN' UNITS 1-AND.3: SYSTEMS i- -AND SYSTEM MODELS=IN THE IPE WILL BE EVALUATED,JAND MODELED, IF~SIGNIFICANT ,

PROCEDURAL. CONTROLS-

. i 4

L ,

TVA/NRC MEETING OCTOBER 15, 1992 EXPANDED INDIVIDUAL PLANT EXAMINATIONS FOR BROWNS FERRY-TOPIC SPOKESMAN RESPONSE TO NRC COMMENTS H. L. JONES COMMENT: SIGNIFICANT VULNERABILITIES ENVELOPED BY THE ANALYSIS OF THE TEN SHARED SYSTEMS (SYSTEMATIC EVALUATION OF ALL SHARED SYSTEMS AND BASIS FOR ELIMINATION)

RESPONSE: - ENCLOSURE 2 TO TVA'S 2/07/92 LETTER:

PROVIDED CRITERIA USED FOR DESIGN OF SHARED SYSTEMS IDENTIFIED SHARED SYSTEMS DESCRIBFD SHARED FUNCTIONS e

JUSTIFIED THE ELIMINATION 0F ANY SHARED SYSTEM

- TOP SYSTEMS IN UNIT 2 IPE WILL BE MODELED m

5

g - .- - -_ __ _ _ .

TVA/NRC MEETING-0CTOBER 15, 1992' EXPANDED:. INDIVIDUAL PLANT EXAMINATIONS FOR BROWNS. FERRY "

TOPIC SPOKESMAN RESPONSE.TO NRC COMMENTS H. L. JONES

' , COMMENT- ANALYSIS LIMITED TO TWO INITIATING EVEdTS -

(BASIS FOR. ELIMINATING-ANY INITIATORS)

)NSE: . LOSS OF OFFSITE POWER AND LOSS OF PLANT AIR CONSIDERED REASONABLE AND REPRESENTATIVE INITIATING EVENTS BOTH EVENTS DIRECTLY RESULT..IN THE SHUTDOWN'0F ALL THREE UNITS-

. = LOSS 0F 0FFSITE POWER WAS1 LEADING l INITIATING EVENT FOR UNIT'2:IPE (69. PERCENT OF.CDF) d

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s. .< , , .- .c , __

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. TVA/NRC MEETING OCTOBER 15, 1992 EXPANDED INDIVIDUAL PLANT EXAMINATIONS FOR BROWNS FERRY TOPIC SPOKESMAN RESPONSE TO NRC COMMENTS-H. L. JONES COMMENT: EFFECT OF SHUT DOWN UNITS ON OPERATING UNITS RESPONSE: . BFN-IPE CONSIDERED EFFECTS OF UNITS 1 AND 3 SHUTDOWN AND UNIT 2 IN OPERATION

- TVA'S 2/07/97 LETTER JUSTIFIED'THREE UNIT OPERATIOR AS t*GST LIMITING CASE h

y I .

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TVA/NRC MEETING OCTOBER 15, 1992 EXPANDED INDIVIDUAL PLANT EXAMINATIONS FOR BROWNS FERRY TOPIC SPOKESMAN CONCLUSION G. D. PIERCE

. EVALUATION OF ShiEMS SHARED BETWEEN UNITS WAS NOT REQUIREMENT OF GENERIC LETTER 88-20

. NUREG-1335 STATES THAT ONLY POWER OPERATION AND HOT STANDBY NEED BE CONSIDERED FOR THE PURPOSES OF THE IPE

- BFN'S PROPOSAL IS PROACTIVE, RESPONSIVE TO NRC COMMENTS, AND IS A GOOD FAITH EFFORT e

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