ML20247D013

Summary of 890105 Meeting W/Util in Rockville,Md Re Civil & Seismic Issues,Including Methodology to Address IE Bulletins 79-14 & 79-02.List of Meeting Attendees & Viewgraphs Encl

ML20247D013
Person / Time
Site:	Browns Ferry
Issue date:	03/22/1989
From:	Gears G Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
IEB-79-02, IEB-79-14, IEB-79-2, TAC-00016, TAC-16, NUDOCS 8903300349
Download: ML20247D013 (37)

Text

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NUCLEAR REGULATORY COMMISSION

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[ March 22,.1989-Docket No. 50-260-1 LICENSEE: Tennessee Valley Authority FACILITY: Browns Ferry Nuclear Plant, Unit 2

SUMMARY

OF MEETING WITH TENNESSEE VALLEY AUTHORITY (TVA)

HELD ON JANUARY 5, 1989 TO DISCUSS CIVIL / SEISMIC ISSUES (TAC 00016)

On Januar

' licensee)y 5,1989, at the the- NRC NRC offices. staff met in Rockville, with Tennessee' Maryland Valley to discuss. civil Authority

/ seismic - (TVA or issues related to the Browns Ferry Nuclear Plant (BFN) Unit 2. The purpose of-this meeting was to provide an overview of the civil / seismic program for BFN,

.with emphasis on the used Amplified Response Spectra (ARS).'and the methodology

to address IE Bulletins-'79-14 and 79-02. TVA proposed that this meeting serve as a' management introduction for scheduled weekly meetings between the NRC and TVA. These week'ly sessions.will begin on January 13, 1989 and will focus on all BFN civil / seismic open issues.

Enclosure-1 lists-the meeting participants. Enclosure 2 contains the slides used in the~ licensee presentation.

TVA presented an overview of the BFN civil / seismic program summarizing the Nuclear Performance Plan Volume 3 and a previous meeting with the staff

'(February.29, 1988). -TVA recapped the events that have, over.the course of the past year, defined the direction of the civil / seismic programs.

~TVA reiterated that changes to the BFN licensing basis and Final Safety Analysis Report (FSAR) would not'be required by the civil effort. While FSAR revisions might be recommended for clarification, the original licensing basis stated in the FSAR will not be changed for the civil / seismic issues. The entire scope of civil / seismic issues is included in the civil calculation program and the seismic design programs outlined at this meeting.

TVA stated that the scope of the seismic instrument tubing program has increased since the February 29, 1988 meeting because more problems in the instrument tubing area had been identified. The staff asked TVA to describe its seismic instrument tubing program and submit a program description for NRC review. TVA agreed to provide further details on this issue and discuss this as an open item in upcoming working meetings. This was acceptable'to the staff.

Regarding the Seismic Design Programs Status Chart (Page 7 of Enclosure 2), the staff questioned the definition of the term " complete." If it.is just " design complete," how does TVA account for the fact that several issues have audit items still open and needing resolution. TVA agreed to amend this chart to address the noted questions.

8903300349 890322 PDR ADOCK 05000260 P PDC g

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TVA and NRC discussed the use of time history for evaluation of non-piping commodities. In accordance with agreements reached in the telephone conference of December 22, 1988, TVA will not use the new artificial time history (ATH) as .

a direct input motion for evalaution of non-piping items (structures, components,etc.). The new ATH will be used only to generate ARS, which will then be used as input for seismic evaluation and analysis of the 79-14/02 scope (pip ng and in-line equipment) and other subsystems (conduit, HVAC components, etc. .

TVA reaffirmed that, to date, the only non-piping commodities that have used time history analysis techniques for their Qualification have used El Centro ground motion time history as input. This was acceptable to the staff as evidenced by Safety Evaluation Reports dated June 26, 1972 and December 21, 1972.

A further discussion on the use of response maxima (e.g. moment, shear, member forces, etc). from global seismic analyses was held. TVA and the staff do not agree on the use of response maxima. It was agreed that additional discussion of this topic is needed.

The staff asked if TVA could demonstrate acceptability of the primary system with a time history analysis using the vertical and horizontal components of El Centro earthquake record as input, FSAR damping ratios (Appendix J for the reactor pressure vessel only), and the newly developed model accepted by the staff. This would be acceptable to the staff. TVA indicated that they do.not believe the reactor pressure vessel analysis is significantly affected by the new models and methodologies and that they agree to review the issue further and advise the NRC.

A discussion followed regarding the use of the new ATH. TVA and the staff agreed to the following four items relative to the use of new ATH input and ARS for design and qualification:

1. New artificial time history input will be used only to develop ARS.

2. TVA will assess where new ARS exceeds the original analysis ARS.

3. If modifications are required based on these impact evaluations, new ARS will be the design input.

4. Any time TVA deviates from the agreements listed in 1, 2, and 3 above, TVA will get back to the staff and discuss on a case-by-case basis.

As an open item, TVA was asked, what ARS derived from El Centro or new artificial ground motion time history will be used as design input for new work? TVA agreed to prepare an answer to this question and respond to the NRC in an upcoming weekly meeting.

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3 The staff stated that the design criteria for the IE Bulletin 79-14/02 program l

scope were applicable to all Class I piping, tubing, and supports (large bore l and small bore) outside of the scope of the Long Term Torus Integrity Program.

The staff also agreed that since the Torus Integrity Program had been previously completed by TVA and reviewed by the staff, the staff had no plans to review this item again.

TVA presented an update of the IE Bulletin 79-14/02 program. To date, TVA has performed approximately 100 modifications to support fuel load and using old methodologies. TVA stated that it anticipated that 900 modifications will be required before restart.

TVA currently projects completion of 35 percent of the 79-14/02 large bore rigorous analyses and support designs by May 31, 1989. TVA also projects 100 percent walkdown program will be completed April 1,1989, and the horizontal slice evaluation of the remaining 65 percent of the 79-14/02 problems will be completed by June 30, 1989. The staff restated its position from the March 1988 meeting that TVA should maintain a constant work effort on this program both before and after restart in order to conscientiously move this issue to completion.

Other items discussed at this meeting include:

1. TVA is to provide the basis for the BFN tornado evaluation being considered a post-restart action. TVA will address this item in an upcoming weekly meeting.

2. The staff plans to conduct the following audits of BFN issues in the upcoming months:

- 1/30 - 2/10/89 Civil calculation program at BFN site.

1/23 - 2/3/89 IE Bulletin 79-14/02 audit at SWEC in Cherry Hill, New Jersey.

3/12 - 3/24/89 Audit of civil open items.

- 4/30 - 5/5/89 Civil calculation program conclusion. '

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3. The definition of zero period acceleration of new ARS was discussed. This issue was raised as part of the discussion of 79-14/02 methodologies in September 1988. The staff stated that TVA's justification for cutoff of flexible analyses at 20 Hz required further staff review of the actual ARS curves for frequencies higher than 20 Hz. The staff would use these curves to access whether TVA's sample evaluations are adequate. TVA agreed to present and discuss these curves in a subsequent weekly meeting.

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4. The staff will review TVA's basis for snubber allowable loads during the upcoming IE Bulletin 79-14/02 audit. The staff also pointed out to TVA that the Design Basis Earthquake load combination has been defined as an emergency event in the Browns Ferry FSAR and that the allowable limits for ,

piping and supports should conform to this classification. l l

Original signed by Gerald E. Gears, Project Manager '

TVA Projects Division Office of Nuclear Reactor Regulation Enclosures

1. Attendance Lists

2. Civil / Seismic Issues Review (Morning)

3. TVAViewgraphs(Afternoon) cc w/ enclosures:

See next page DISTRIBUTION Docket File NRC PDR Local PDR Those on Attached List 1

I

NRR:TVA/BC TVA/AD/P  :  :  : :

l OFC :NRR:TVA/LA :NRR:TVA/PM

____.: y,  :- :.__. 1.;_____:____________:___________:...._____..

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NAME

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DATE : 3/ M /89  : 3/ /89  : 3/ @ /89  :

OFFICIAL RECORD COPY M b 1

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.Mr. Oliver D. 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 Chattanooga, Tennessee 37402-2801 Mr. C. Mason Dr. Henry Myers, Science Advisor Tennessee Valley Authority Committee 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 11921 Rockville Pike Browns Ferry Nuclear Plant Suite 402 P.O. Box 2000 Rockville, Maryland 20852 Decatur, Alabama 35602 Mr. Oliver D. Kingsley, Jr.

Mr. D. L. Williams Senior Vice President, Nuclear Power Tennessee Valley Authority Tennessee Valley Authority 400 West Summit Hill Drive 6N 38A Lookout Place W10 B85 1101 Market Street  !

Knoxville, Tennessee 37902 Chattanooga, Tennessee 37402-2801 Chairman, Limestone County Commission P.O. Box 188 Athens, Alabama 35611 ,

Claude Earl Fox, M.D.

State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36130 i

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l, DISTRIBUTION FOR MEETING SUPNARY DATED: March 22, 1989-Facility: ' Browns Ferry Nuclear Plant, Unit 2*

Distribution

' "4 "NRC PDR M B Local PDR Projects Reading

'ADSP Reading D. Crutchfield ~

B. D. Liaw S. Black.-

R. Pierson G. Gears M. Simms

F. McCoy-J. Rutberg.

D. Terao T. Cheng J. Fair E. Goodwin ACRS (10).

GPA/PA-GPA/CA(M.Callahan)(5)-

S. Varga E. Jordan B. Grimes P. Gwynn J. Scarborough G. Marcus T. Elsasser L.-Norrholm

~C. Ader BFN Rdg. File Ofol

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ENCLOSURE 1-ATTENDANCE LIST Name- Affiliation Patrick Carier TVA Roger-Gavankar TVA H. B. Bounds TVA David.Terao NRC Thomas Cheng NRC-Gerry Gears

.NRC

Bob Pierson NRC John Fair NRC C. H. Fox .TVA Jon Rupert -TVA Thamo. Cruise TVA Alan Chan SWEC John McCall .TVA

. Karl Seidle TVA W. A. Massie TVA E. F. Goodwin NRC B. D. Liaw NRC

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BROWNS FERRY UNIT 2 CIVIL / SEISMIC ISSUES REVIEW

'NRC/ WHITE FLINT BLDG.

JANUARY 5,'1989 8:30 a.m. - 12:00 Noon I. INTRODUCTION ........................... ........ Pat Carier

' MEETING OBJECTIVES ............................ Benny Bounds II. CIVIL / SEISMIC PROGRAMS OVERVIEW ............. Roger Gavankar III. AMPLIFIED RESPONSE SPECTRA EVALUATION ........... Jon Rupert IV. 79-14/02 PROGRAM .............................. T. C. Cruise V. SMALL BORE PIPING PROGRAM ..................... T. C. Cruise VI. CIVIL CALCULATIONS PROGRAM ...................... Jon Rupert VII. AGENDA FOR THE NEXT CIVIL / SEISMIC ISSUES MEETING l

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. , . g BROWNS FERRY UNIT 2 CIVIL / SEISMIC ISSUES REVIEW MEETING OBJECTIVES-o INITIATE WEEKLY TEGNICAL MEETING o PROVIDE AN OVERVIEW OF THE. CURRENT STATUS OF CIVIL / SEISMIC PROGRAMS

'o PROVIDE STATUS OF AMPLIFIED RESPONSE SPECTRA (ARS)' EVALUATIONS o PROVIDE STATUS OF 79-14/02 PROGRAM AND SMALL BORE PIPE.IN

~ SUPPORT OF THE UPCOMING AUDIT

o. . PROVIDE STATUS OF. CIVIL CAL,C PROGRAM IN SUPPORT OF THE

. UPCOMING AUDIT

o. ' DISCUSS-AGENDA FOR THE FOLLOWING WEEK'S MEETING l

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BROWNS FERRY UNIT 2 OVERALL CIVIL PROGRAM CIVIL / SEISMIC PROGRAMS OVERVIEW' RECAP OF THE FEB. 29 PRESENTATION ON OVERALL CIVIL PROGRAM CHRONOLOGY OF SIGNIFICANT EVENTS SINCE FEB. 29, '-

1988 BRIEF CURRENT STATUS i

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5 02/29/88 BROWNS FERRY UNIT 2 OVERALL CIVIL PROGRAM l CIVIL -

- SEISMIC-DESIGN-- -

CALCULATION PROGRAM -

REVIEWS 1

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SUSPENDED SYSTEMS LARGE BORE PIPING RECIRC PIPING ~

CRD PlPING TORUS PIPING

- SMALL BORE PIPING

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INSTRUMENT TUBING CABLE TR AYS ELECTRICAL CONDUlT H V A C _.. _ . .

STRUCTURES

, DYNAMIC, ANALYSIS DRYWELL PLATFORMS CONCRETE STRUCTURES MISCELLANEOUS STEEL STEEL STRUCTURES TORUS PRIMARY CONTAINMENT MASONRY WALLS EMBEDMENTS - - -

EQUIPMENT QUALIFICATION TANKS & HEAT EXCHANGERS MECHANICAL EQUIPMENT ELECTRICAL EQUIPMENT I

GEOTECHNICAL SEISMIC GROUND MOTIONS SOIL & ROCK ANALYSIS SETTLEMENT & SLOPE STABILITY PILES & FOUNDATIONS BURIED STRUCTURES ,

SPECIAL CIVIL TOPICS PIPE RUPTURE ~~

II OVER I TORNADO EVALUATIONS SECONDARY CONTAINMENT PENET.

HEAVY LOADS EVALUATIONS FLOODING .:.,_C  ; ; - ,

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. BROWNS FERRY SEISMIC ISSUES CHRONOLOGY c) AUGUST 1986 SUBMIH ED NUCLEAR PERFORMANCE PLAN VOLUME 3, REVISION 0 b) MAY 1987 SUBMIHED REQUEST TO USE ARTIFICIAL TIME HISTORY IN LIEU OF EL CENTRO TO GENERATE ARS (AMPLIFIED RESPONSE SPECTRA).

I c) DECEMBER 1987 DOCKETED 79-14 PROGRAM PLAN IN 12/11/87 BEIMESDA MEETING.

d) JANUARY 1988 NRC ISSUED SER ON USE OF ARTIFICIAL TIME HISTORY IN LIEU OF EL CENTRO TO GENERATE ARS (1/25/88 LETTER).

e) FEBRUARY 1988 PRESENTED OVERALL CIVIL PROGRAM AND " FOCUSED" SEISMIC DESIGN PROGRAMS IN 2/29/88 ROCKVILLE MEETING.

f) MARCH 1988 COMPLETED SUBMITTALS OF ALL SEISMIC DESIGN PROGRAM PLANS.

g) MARCH 1988 NRC CONDITIONALLY APPROVED 79-14 PROGRAM PLAN, WITH:

100% WALKDOWNS BEFORE RESTART, ACCEPTABLE AUDITS, AND EVALUATION OF GENERIC IMPLICATIONS (3/25/88 LETTER).

h) JUNE 1988 DISCUSSED PIPING SEISMIC DESIGN METHODS IN 6/16/88 AND 6/30/88 ROCKVILLE MEETINGS.

i) JULY 1988 NRC ISSUED SERs, WI'IH C0hMENTS, FOR NON-PIPING SEISMIC PROGRAMS (7/26/88 LETTER).

j) AUGUST 1988 INITIAL 35% OF 79-14 COMPLETED USING ORIGINAL CALCULATION MEIHODS.

k) AUGUST 1988 NRC QUESTIONED ORIGINAL SEISMIC MODELS (1 STICK VERSUS MULTI-STICK) USED TO GENERATE ARS DURING KN0XVILLE AUDIT OF CIVIL CALCULATIONS.

1) SEPTEMBER 1988 SEISMIC DESIGN bihEODOLOGY RESOLVED, TVA COMMITTED TO REGENERATE ARS AND TO REVISE INITIAL 35% OF 79-14 USING REVISED MEIHODS (9/19/88 AND 9/28/88 LETTERS).

m) OCTOBER 1988 NRC AUDITED NON-PIPING SEISMIC DESIGN PROGRAMS AT BROWNS FERRY SITE.

n) NOVEMBER 1988 USE OF TIME HISTORY AS ANALYSIS TECHNIQUE FOR PIPING DISCUSSED WITH NRC DURING 11/17/88 MEETING AT CHERRY HILL.

o) DECEMBER 1988 NRC CLARIFIED LIMITATION OF TIME HISTORY USAGE AS n->,

ANALYSIS TECHNIQUE IN 12/13/88 MEETING.

p) DECEMBER 1988 NRC ACCEPTED 79-14 PROGRAM USE OF GENERIC IMPLICATION I

MEIHODS (12/14/88 LETTER).

i q) DECEMBER 1988 NEW ARS AUDITED BY NRC IN KN0XVILLE.

l r) JANUARY 1989 INITIATED WEEKLY MEETINGS WITH NRC TO RESOLVE SEISMIC l

ISSUES.

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BROWNS FERRY UNIT 2 SEISMIC DESIGN PROGRAMS STATUS SEISMIC PROGRAM DESIGN SER CABLE TRAY SUPPORTS COMPL ISSUED CONDUIT SUPPORTS COMPL ISSUED

• HVAC COMPL ISSUED

• DRYWELL STEEL PLATFORMS COMPL ISSUED

• MISCELLANEOUS STEEL COMPL ISSUED

• CLASS II OVER I ONGOING NOT ISSUED SECONDARY CONTAINMENT PENETRATION COMPL ISSUED TORUS COMPL ISSUED 79-14 ONGOING NOT ISSUED CRD PIPING ONGOING NOT ISSUED SMALL BORE ONGOING NOT ISSUED INSTRUMENT TUBING ONGOING NOT ISSUED I l

• WITH COMMENTS 1

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8 IMPACT EVALUATIONS FOR NEW AMPLIFIED RESPONSE SPECTRA (ARS)

I. CHRONOLOGY OF ACTIVITIES AT BFN A. LICENSING BASIS - SMOOTH RESPONSE SPECTRA l

1. 0.lg OBE

2. 0.2g DBE B. ORIGINAL DESIGN MEE 0D - EL CENTRO

1. DYNAMIC ANALYSIS MODELS

a. SINGLE STICK (RB)

b. MULTIPLE STICK (RB)

2. ANALYSIS MEIHODS

a. SINGLE STICK SPECTRA

b. MULTIPLE STICK (RPV 6 INTERNALS)

c. VERTICALLY RIGID C. CHRONOLOGY

1. MAY 87 TVA REQUESTED USE OF CLOSE-FIT AE TO GENERATE ARS

2. JANUARY 88 NRC RESPONSE TO TVA

3. AUGUST 88 - NRC AUDIT OF ARS DISAGREEMENT OF FSAR/SER INTERPRETATION

4. SEPTEMBER 88 TVA RESPONSE TO NRC AUDIT

5. NOVEMBER 88 EE NRC AUDIT ENDING 11/10/88 IDENTIFIED THE COMPARISON OF THE OLD ARS WIE THE NEW ARC AS AN OPEN ITEM.

6. DECEMBER 88 NRC AUDIT

. II. . STA'IUS -

' A. SPECTRA' DEVELOPMENT

. RB .'

DG SBGT OFF GAS-INTAKE RHRSW TUNNEL B. IMPACT EVALUATIO'N-STRUCTbRES STEEL FEATURES CONDUIT

^ CABLE TP.AY HVAC.

EQUIPMENT PIPING RPV 6 INTERNALS III.. SCHEDULE EVALUATIONS COMPLETE MID-FEBRUARY 1989.

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l BROWNS FERRY UNIT 2 79-14/79-02 SIGNIFICANT EVENTS DECEMBER 1987 DOCKETED 79-14 PROGRAM PLAN IN 12/11/87 BETHESDA MEETING.

FEBRUARY 1988 PRESENTED OVERALL CIVIL PROGRAM AND " FOCUSED" SEISMIC DESIGN PROGRAMS IN 2/29/88 ROCKVILLE MEETING.

MARCH 1988 NRC CONDITIONALLY APPROVED 79-14 PROGRAM PLAN, WITH:

100% WALKDOWNS BEFORE RESTART, ACCEPTABLE AUDITS, AND EVALUATION OF GENERIC DUPLICATIONS (3/25/88 IEITER).

JUNE 1988 DISCUSSED PIPING SEISMIC DESIGN METHODS IN 6/16/88 AND 6/30/88 ROCKVILLE MEETINGS.

AUGUST 1988 INITIAL 35% OF 79-14 ANALYSIS COMPLETED USING ORIGINAL CALCULATION MEIHODS.

SEPTEMBER 1988 SEISMIC DESIGN METHODOLOGY RESOLVED, TVA C0hMITTED TO REGENERATE APS AND TO REVISE INITIAL 35% OF 79-14 USING REVISED METHODS (9/19/88 AND 9/28/88 LEITERS).

NOVEMBER 1988 USE OF TIME HISTORY AS ANALYSIS TECHNIQUE FOR PIPING DISCUSSED WITH NRC DURING 11/17/88 MEETING AT CHERRY HILL.

DECEMBER 1988 NRC CLARIFIED LIMITATION OF TIME HISTORY USAGE AS 79-14 ANALYSIS TECHNIQUE IN 12/13/88 MEETING.

DECEMBER 1988 NRC ACCEITED 79-14 PROGRAM USE OF GENERIC IMPLICATION METHODS (12/14/88 LEITER) .

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. BROWNS. FERRY UNIT 2 l -79.14/79-02 l0 SCOPE Lo" NRC BULLETIN 79-14

o' NRC BULLETIN 79-02 o APPROXIMATE QUANTITIES o - 30 SYSTEMS

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- o' . 220 STRESS PROBLEMS o 3500 SUPPORTS

SCHEDULE o - COMPLETION OF 100% WALKDOWN "4/30/89 o- COMPLETION OF 35% ANALYSIS AND SUPPORT DESIGN 5/31/89

.o COMPLETION OF HORIZ0! GAL SLICE 6/30/89 i

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SCOPE o' ALL SEISMIC CLASS I PIPING 2 INCHES AND SMALLER REQUIRED FOR SAFE SHIED 0WN EXCEPT THAT WHICH hAS RIGOROUSLY ANALYZED.

o 26,000 FEET OF PIPE-o 4,000 SUPPORTS PROGRAM OVERVIEW o- RESTART o CONFIGURATION WALKDOWN OF 30 PROBIS S o- ANALYZE AND EVALUATE SUPPORTS FOR 30 PROBISG o MAKE MODIFICATIONS TO MEET OPERABILITY CRITERIA o FROM THE 30 PROBLEMS ANALYZED, DETERMINE THE R00r CAUSES FOR

- MODIFICATIONS AND IDENTIFY PHYSICAL ATTRIBlTTES o WALKDOWN REMAINING PIPE FOR PHYSICAL ATTRIBlEES o -EVALUATE IDENTIFIED DISCREPANCIES o MAKE MODS TO MEET OPERABILITY CRITERIA STATUS o ANALYSIS AND SUPPORT EVALUATION OF 30 PROBLEMS IS COMPLETE o GENERIC ATTRIBtHES ARE IDENTIFIED o PLANT WALKDOWN FOR GENERIC ATTRIBUTES COMPLETE o EVALUATION OF THE 30 PROBIBS FOR ARS AND METHODS CHANGES AND THE EFFECT ON THE ATTRIBUTES IS IN PROGRESS SCHEDULE 6/1/89 o DESIGN COMPLETION FOR RESTART

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L CIVIL CALCULATIONS REVIEWS A.. OVERALL STA*IUS - 80% COMPLETE IN MID-JANUARY.

o SCOPE.

TO ASSURE TECHNICAL ADEQUACY OF CIVIL ENGINEERING CALCULATION CATEGORIES-r o STATUS-ALL CALCULATION CATEGORIES REQUIRING TECHNICAL REVIEWS HAVE BEEN-IDENTIFIED. TECHNICAL REVIEWS IN ACCORDANCE WITH NEP-5.2 HAVE BEEN COMPLETED. IN SOME CASES, W E TECHNICAL REVIEWS IDENTIFIED

. y DISCREPANCIES WHICH REQUIRE CORRECTIVE ACTION. SOME OF THE CORRECTIVE ACTIONS ARE STILL IN PROGRESS.

o FIELD IMPLEMENTATION STATUS NO MODIFICATIONS HAVE YET BEEN IDENTIFIED FROM WE CALCULATION REVIEWS.

B. ~ SCHEDULE o DYNAMIC ANALYSIS - COMPLETE.

o CONCRETE STRUCTURES - 1/15/89 o STEEL STRUCTURES - 6/1/89 o PRIMARY CONTAINMENT - 1/15/89 o MASONRY WALLS - 1/15/89 o EMBEDMENTS - COMPLETE o TANKS 6 HEAT EXCHANGERS - COMPLETE o SEISMIC GROUND MOTIONS - COMPLETE o S0IL 6. ROCK ANALYSIS - /15/89 o SETTLEMENT 6 SLOPE STABILITY - POST RESTART o PILES 6 FOUNDATIONS - COMPLETE o BURIED STRUCTURES, . CONDUIT - COMPLETE o BURIED STRUCTURES, PIPING - 1/31/89 o PIPE RUlrrURE - COMPLETE o TORNADO EVALUATIONS - POST RESTART o HEAVY LOADS EVALUATIONS - POST RESTART o FLOODING - POST RESTART C. ACTIONS REQUIRED FROM W E NRC REVIEW AND APPROVE PROGRAM IMPLEMENTATION

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BROWNS FERRY UNIT 2' CIVIL / SEISMIC ISSUES REVIEW l

NRC - WHITE FLINT BLDG..

1:00 - 4:30 p.m.

OPEN TECHNICAL ITEMS-1.- ZPA DEFINITION............................................A. Chan 2.- .ARS IMPACT EVALUATION..................................Jon Rupert

' 3.. . USE OF NF SNUBBERS 6 ALL0WABLES. . . . . . . . . . . . . . . . . . . . . .T. ' C. Cruise

4. ' UPLIFT ON ROD HANGERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .T. C. Cruise -

- 5. - U-BOLT LATERAL L0 ADS..................................Karl'Seidle 6 . PLATFORM 'IHERMAL GR0WIH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Jon Rupert

- 7. - MSSSP-58 DEFINITION...................................Karl Seidle S

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.: t-1 TECHNICAL JUSTIFICATION FOR THE USE OF ZPA AND 20 Hz CDTOFF FREQUENCY IN PIPING ANALYSIS

. Concern: The use . of a 20 Hz cutoff frequency in conjunction with' a missing mass correction . using the ZPA may unders;timate is, lower than the the; piping' responses since the ZPA

' acceleration at 20 Hz.

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TVA has performed the following study with 3 pipe stress problems.

These three problems cover areas with the greatest differences in the accelerations at 20 Hz and the ZPA.

1. Pipe stress analysis using 20 Hz cutoff plus the missing mass correction using the ZPA.

2. Pipe stress analysis using 33HZ cutoff plus the missing mass correction using the ZPA.

3. Pipe stress analysis using the structural input which considers structural modes beyond 20 Hz and using a 50 Hz piping analysis cutoff frequency plus the missing mass correction using the ZPA.

4. Pipe support loads from the above three analyses were compared.

Conclusion:

The Browns Ferry approach of using 20 Hz cutoff plus the missing mass correction using the ZPA provides adequate pipe support design.

e

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i ZPA 205 - y ELETATION ACCEL. AT 20 H2. ...-- --...

DIRECTION .........

......... \

0.2 0.221 519.0 0.421 N-S 0.2 0.162 537.0 0.362 0.219 0.664 565.0 0.883 0.301 0.782 593.0 1.053 9

0.336 0.117 621.25 0.453 0.404 0.168 639.0 0.572 0.492 0.533 664.0 1.025 519.0 0.421 0.2 0.221 '

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0.232 0.678 f65.0 0.91 0.328 0.752 593.0 1.08

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. . . . . . . . . . . .519.0 . . . . . - - . . .0.281 . . . - - . . . .0.133

. . . . .0.148 .............

YER 0.132 0.104 537.0 0.236 0.174 , 0.15 0.024 565.0 0.159 0.089

.593.0 0.248 l 0.165 0.285 621.25 0.45 0.182 0.337 639.0 0.519 0.203 0.359 664.0 0.562 O = ACCEL.-' AT 20 HZ. - IPA .

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.e5 COMPARISONS OF RESULTS FOR PROBLEM N1-223-5R RHR/SW OUTSIDE DRYWELL METHOD HOUSNER NEW HOUSNER DW TIME HISTORY (0.5 %) TIME HISTORY (0.5 %) &

CUTOFF FREQUENCY 20 HZ CUTOFF FREQUENCY 50 HZ TH CASE NO. ] 6-0 A,B & C l 7-0 A,B & C l NODE LOAD

• TOTAL RATIO LOAD

• TOTAL RATIO POINT LOAD LOAD S 1 FX 382 1029 1 354 1001 0.9727 647 U 1 FY 1601 2212 1 1635 2246 1.0153 611 P 1 FZ 3001 3076 1 3007 3082 1.0019 75 P 1 MX 20436 23068 1 20686 ' 23318 1.0108 2632 0 1 MY 5323 5778 1 5376 5831 1.0091 455 R 1 MZ 7732 12539 1 7842 12649 1.0087 4807 T 4 FY 87 2449 1 88 2450 1.0004 2362 7 FX 2181 2864 1 1989 2672 0.9329 683 L 7 FY 2462 4302 1 2456 4296 0.9986 1840 0 8 FY 1089 2818 1 1206 2935 1.0415 1729 A 12 FY 602 1994 1 657 2049 1.0275 1392 .

D 15 FY 1088 2665 1 1171 2748 1.0311 1577  !

16 FX 3758 7746 1 3865 7853 1.0138 3988 52 FX 5487 5713 1 5516 5742 1.0050 226 52 FY 2015 5009 1 2009 5003 0.9988 2994 52 FZ 2813 3791 1 2846 3824 1.0087 978 52 MX 45 115 1 47 117 1.0173 70 52 MY 788 858 1 788 858 1 70 38 FY 1720 4653 1 1713 4646 0.9984 2933 42 FX 2329 2907 1 2317 2895 0.9958 578 ,

45 FY 100 1802 1 101 1803 1.0005 1702 49 FX 790 1486 1 807 1503 1.0114 696 49 FY 2197 3780 1 2254 3837 1.0150 1583 49 FZ 3265 3442 1 3267 3444 1.0005 177 49 MX 25627 27530 1 25707 27610 1.0029 1903 49 MY 10879 12003 1 10884 12008 1.0004 1124 49 MZ 9911 14640 1 10135 14864 1.0153 4729 17E FZ 3318 3534 1 3670 3886 1.0996 216 341 FX 2972 2972 1 2972 2972 1 0 341 FY 3018 8231 1 3174 8387 1.0189 5213 341 FZ 2588 2588 1 2635 2636 1.0185 0 341 MX 85 85 1 85 ! 85 1 0 341 MY 341 341 1 348 348 1.0205 0 j 341 MZ 349 349 1 367 367 1.0515 0

• -- SSE CASE ONLY 4 d

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q HPCI OUTSIDE DRYWELL COMPARISONS OF RESULTS FOR PROBLEM N1-273-8R

_-________________--_---__-- _-_______--_-____--______-_-____-____-__-_______ NEW HOUSNER DW METHOD HOUSNER TIME HISTORY (0.5 %) TIME HISTORY (0.5 %) &

CUTOFF FREQUENCY 50 HZ TH CUTOFF FREQUENCY 20 HZ ___----_____----__________--_______

____-______________________--__-_---_____l 6 0 A,B & C 7-0 A,B & C l l CASE NO. l _____-____~____________________

3126 ___---__________--___2961 3926 1 3761 0.9579 800 S 5 FX 6247 1.0054 3668 FY 2545 6213 1 2579 U S 3287 0.9739 1794 5 FZ 1581 3375 1 1493 P 7914 19276 0.9977 113'62 5 MX 7958 19320 1 P 13644 47185 0.9965 33541 5 MY 13808 47349 1 0 1 41051 47664 1.0008 6613 R S MZ 41009 47622 349 354 1 5 354 1 T VS14 FY 5 49 1428 1 1379 I 25 FY 49 1428 1 1 6442 6442 1.0122 0 L B60 FX 6364 6364 1270 496 1766 1 497 1767 1.0005 0 81 FY 561 1785 1 1224 85 FY 561 1785 1 A 1 529 1791 1.0005 1262 D 100 FY 528 1790 0 3446 3446 1 3430 3430 0.9953 109 FZ 598 1695 1.0005 1097 110 FY 597 1694 1 1791 1 510 1792 1.0005 1282 130 FY 509 1 1070  ;

145 FY 236 1306 1 236 1306 1646 1 55 1647 1.0006 1592 160 FY 54 1312 4677 5989 1 4677 5989 1 175 FX 3096 3483 1.0031 387 175 FY 3085 3472 1 1 899 3631 1.0008 2732 215 FY 896 3628 1451 230 FY 700 2151 1 703 2154 1.0013 3701 1 1264 3706 1.0013 2442 245 FY 1259 835 7652 8487 1 7660 8495 1.0009 260 FZ 145 1811 1.0005 1666 270 FY 144 1810 1 3762 4180 0.9891 418 290 FX 3808 4226 1 3092 132 3224 1 134 3226 1.0006 305 FY 0 2800 1 2800 341 FY 0 2800 1 3539 1 2537 3476 0.9821 939 345 FX 2600 1101 345 FY 2651 3752 1 2690 3791 1.0103 6323 1 G250 6383 1.0094 133 345 FZ 6190 12258 345 MX 7748 20006 1 8037 20295 1.0144 28439 1 23354 28571 1.0046 5217 345 MY 23222 6986 17644 24630 1 17809 24795 1.0066 345 MZ 2335 2335 1.0012 0 2332 1 525 FZ 2332 2981 2981 1 2987 2987 1.0020 0 535 FZ

• -- ESE CASE ONLY

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1 EECW OUTSIDE DRYWEL'L l COMPARISON OF RESULTS FOR PROBLEM N1-167-2RA

---

HOUSNER ---------------------------- NEW USNER HO . DW METHOD TIME HISTORY (0.5%)

TIME HISTORY (0.5%) CUTOFF FREQUENCY 50 HZ TH l

~

CUTOFF FREQUENCY 20 HZ ------------------------

---

& 6-0 A,B

---

'A,B C l 7-O & C l CASE NO. l

---_---______---__---_---- TOTAL--_------_--_--_--_----__----- RATIO LOAD

• TOTAL RATIO NODE LOAD

• LOAD POINT LOAD I

7599 7620 1.00 21 R14 FX 7616 7637 1 3080 10465 1 7389 10469 1.00 R14 FY 7385 16343 16366 1.00 23 16343 16366 1 504 R14 FZ 4185 1 3696 4200 1.00 R14 MX 3681 164704 164806 1.00 102 164689 164791 1 22112 R14 MY 1 43945 66057 1.00 R14 MZ 43804 65916 4951 S

6871 1 1945 6896 1.00 U H19 FY 1920 3994 7291 0.99 3297 H18 FY 4046 7343 1 33 P

15479 1 15473 15506 1.00 P R13 FX 15446 4103 7374 0.99 3271 4214 7485 1 19 O R13 FY 1 5439 5458 1.00 R13 FZ 5445 5464 11069 R

28514 1 17394 28463 1.00 T R13 MX 17445 74488 74834 1.00 346 74575 74921 1 R13 MY 1 8862 10781 1.00 1919 R13 MZ 8904 10823 3213 4442 1 1223 4436 1.00 L H17 FY 1229 1590 3798 0.98 2208 1650 3858 1 52 O H16 FY 3344 1 2635 2687 0.80 j A R12 FX 3292 13529 1.00 12 j 13501 13513 1 13517 5844 D R12 FZ 9327 1 3509 9353 1.00 l H15 FY 3483 4970 1.00 16 I 4945 4961 1 4954 4165 R11 FX 6645 1 2499 6664 1.00 R11 FY 2480 1561 4766 1.00 3205 1558 4763 1 H14 FY 659 4258 0.99 3599 l 716 4315 1 30 H13 FY 7243 1 7212 7242 1.00 l R10 FX 7213 1089 1.12 742 a T 231 973 1 347 5 j R10 Y 10483 10488 0.99 10536 10541 1 1365 (

R10 FZ 1 1282 2647 1.00 R10 MX 1272 2637 113 152084 1 151745 151858 1.00 R10 MY 151971 1155 1866 1.24 711 789 1500 1 1412 R10 MZ 8789 1 7430 8842 1.01 ]

- S650FY 7377 1106 1125 1.02 19 i 1081 1100 1 482 S665FX 765 1 275 757 0.99 i

)

S665FY 283 1404 1.00 16 1390 1406 1 1388 575 5690FX 860 1 285 860 1.00 S690FY 285 800 1.00 390 414 804 1 410 33 S730FY 558 1 498 531 0.95 S740FZ 525 854 1.01 49 800 849 1 805 46 765 FX 1 656 702 1.00 765 FZ 658 704 0.98 1114 1415 1 275 1389 S785FY 301 601 1.00 25 578 603 1 576 189 ANC6FX 275 1 82 271 0.99 ANC6FY 86 307 1.01 33 270 303 1 274 336 ANC6FZ 895 1 546 882 0.99 ANC6MX S59 , . . . . .

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4 EECW OUTSIDE DRYWELL COMPARISON ' OF RESULTS FOR PROBLD4 N1-167-2RA -----

HOUS NER-----

---

DW NEW HOUSNER .

, METHOD TIME HISTORY (0.5%) &

TIME HISTORY (0.5%) CUTOFF FREQUENCY 50 HZ TH CUTOFF FREQUENCY 20 HZ

---

--------------------------------------------------------- 6-0 A,B & C .l 7-0 A,B & C- l CASE NO. l ----------------------------------------

---

TOTAL RATIO NODE LOAD

• TOTAL RATIO LOAD

• LOAD LOAD POINT -

---

645 3598 3 1

---

3604 3651 1.0 47 53 ANC6MY 725 778 1.00 -

724 777 1 ANC6MZ 1 289 984 0.99 695 S890FY 299 994 1.01 28 1068 1096 1 1079 1107 S915FX 1 202 636' 1.03 434 5915FY 181 615 9 285 1 263 272 0.95 S930FX 276 948 1.01 800 141 941 1 148 S930FY 1 229 238 0.93 9 t 935 FX 246 255 280 420 1 169 449 1.07 935 FY 140 807 1.00 507 298 805 1 300 940 FY 1 219 266 0.88 47 945 FX 256 303 263 955 1218 1 967 1230 1.01 945 FY 1 1267 1296 0.98 29 950 FX 1289 1318 901 2119 3020 1 2130 3031 1.00 950 FY 1 1239 1318 0.99 79 970 FX 1251 1330 100 4469 1 4368 4468 1.00 970 FZ 4369 1368 1.00 304 1064 1368 1 1064 1020FY 1 825 936 1.00 111 1020FZ 824 935 92 737 1 661 753 1.02 1035FX 645 3284 1.01 1184 2062 3246 1 2100 51 1035FY 1 534 585 1.00 SM25FX 535 586 'O 98 1529 646 2175 1 609 2138 SM25FY 389 417 1.00 28 391 419 1 SM25FZ

• -- SSE CASE ONLY 4

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