ML17352A804

Summary of 940929 Meeting W/Util Re Containment Reanalysis Being Conducted by Util & Bechtel.List of Attendees & Meeting Agenda Encl

ML17352A804
Person / Time
Site:	Turkey Point
Issue date:	10/05/1994
From:	Croteau R Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 9410120127
Download: ML17352A804 (40)

Text

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October:g, 1994 P

LICENSEE:

Florida Power 5 Light Company (FPL) f FACILITY:

Turkey Point Units 3 and 4

SUBJECT:

CONTAINMENT STRUCTURAL REANALYSIS MEETING On September 29,

1994, the staffs of Florida Power

& Light Company (FPL) and NRR met at the NRC offices.

The purpose of this meeting was to discuss the.

containment reanalysis being conducted by FPL and Bechtel.

Reanalysis was initiated when several tendons were found below the expected tension during surveillance testing.

Short-term adequacy was previously demonstrated.

FPL expects to demonstrate the acceptability of the containment beyond the licensed life of the plant.

FPL will submit the analysis for NRC review in early 1995.

Enclosure I contains a list of attendees.

Enclosure 2 contains the meeting's agenda and visual aids used by the participants.

Docket Nos.

50-250 and 50-251

Enclosures:

As stated cc w/enclosures:

See next page Distributi.on Docket',i;1 em NRC 8 Local PDRs PDII-2 RF W. Russell/F. Hiraglia R.

Zimmerman S. Varga J. Zwolinski R. Croteau G. Bagchi H. Ashar E. Dunnington OGC ACRS (10)

D. Verrelli, RII (Original Signed By)

R. Croteau, Project Manager Project Directorate II-2 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation OFC LA:PD II-2 PH: PDII-2'D:PDI I-2 NAME EDunnin tCP RCrotea VHcCree l4 DATE

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/94 D /

/94 JQ/ ~/94 OFFICIAL RECORD COPY FILENAME: G: iTPHEET. SUM 9410120127 941005 PDR ADOCK 050002501~

P PDR MEIl EKE IMPER cIPv p,)'

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Florida Power and Light Company CC:

Harold F. Reis, Esquire Newman and Holtzinger, P.C.

1615 L Street, N.W.

Washington, DC 20036 Jack Shreve, Public Counsel Office of the Public Counsel c/o The Florida Legislature 111 West Madison Avenue, Room 812 Tallahassee, Florida 32399-1400 John T. Butler, Esquire

Steel, Hector and Davis 4000 Southeast Financial Center Miami, Florida 33131-2398 Hr. Thomas F. Plunkett, Site Vice President Turkey Point Nuclear Plant Florida Power and Light Company P.O.

Box 029100 Miami, Florida 33102 Joaquin Avino County Manager of Metropolitan Dade County 111 NW 1st Street, 29th Floor Miami, Florida 33128 Senior Resident Inspector Turkey Point Nuclear Generating Station U.S. Nuclear Regulatory Commission P.O.

Box 1448 Homestead, Florida 33090 Mr. Bill Passetti Office of Radiation Control Department of Health and Rehabilitative Services 1317 Winewood Blvd.

Tallahassee, Florida 32399-0700 Turkey Point Plant Units 3 and 4

Mr. Joe Hyers, Director Division of Emergency Preparedness Department of Community Affairs 2740 Centerview Drive Tallahassee, Florida 32399-2100 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W. Suite 2900 Atlanta, Georgia 30323 Attorney General Department of Legal Affairs The Capitol Tallahassee, Florida 32304 Plant Manager Turkey Point Nuclear Plant Florida Power and Light Company P.O.

Box 029100 Miami, Florida 33102 Mr. H. N. Paduano, Manager Licensing 5 Special Programs Florida Power and Light Company P.O.

Box 14000 Juno

Beach, Florida 33408-0420 Hr.

Edward J.

Weinkam Licensing Manager Turkey Point Nuclear Plant P.O.

Box 4332 Princeton, Florida 33032-4332 Hr. J. H.'oldberg President Nuclear Division Florida Power and Light Company P.O.

Box 14000 Juno

Beach, Florida 33408-0420

Turkey Point Units 3 and 4 CONTAINMENTREANALYSIS MEETING September 29, 1994 Attendees Name R. Kundalkar R. Gavankar R. Tomonto

0. Aurbuz R. Gil E.

Thomas F.

Farzam R. Hurt D. Koennicke M. Moran H. Ashar R. Croteau R.

Rothman t

D. geng Or anization FPL FPL FPL Bechtel FPL Bechtel Bechtel Bechtel FPL FPL NRC NRC NRC NRC

FLORIDA POWER AND LIGHT ey P Pgi TURKEY POINT UNITS 3 and 4 CONTAINMENTREANALYSIS September 29, 199$

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A E

~ ObjectivelBackground

~ Licensing Activities

~ Engineering Analysis

~ Closing (R.S. Kundalkar)

(R.J. Tomonto)

(M.F. Moran)

(R.S. Kundalkar)

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M ETI BJE IVES

~ Discuss / Describe:

Tendon Surveillance Program Containment Reanalysis Methodology

~ Results indicate that the post-tensioning system is acceptable beyond the licensed life of plant Results to be incorporated in UFSAR

BA R

UND

~ January 1993 Meeting with NRC

~ 20th Year Surveillance Results

~ Corrective Actions to demonstrate acceptability of containment beyond licensed life of the plant

I E

~ Submittal of Special Reports on 20th Year Surveillance

~ Response to NRC Request for Additional Information (RAI)

~ Issuance of License Amendments 160/154 (3/30/94) - which clarified Licensed Containment Design Pressure as 55 PSIG

~ Issuance of License Amendments 162/156 (4/20/94) - recapture of the Operating License Construction Period (U3 - July 2012, U4 - April 2013)

~ 25th Year Tendon Surveillance program scheduled to begin in 1996

R L A LE U

I 3 U 4

~

Structural Int Test Commercial Operation 25th Yr Surveillance 30th Yr Surveillance 35th Yr Surveillance End of License Jul 1971 Dec 1972 Jul 1996 Jul 2001 Jul 2006 Jul 2012 Feb 1972 Sep 1973 Feb 1997 Feb 2002 Feb 2007 Apr 2013 Svrveillances for 1st, 3rd, 5th, 10th, 15th, and 20th year were satisfactorily completed

EN I

E Rl ANALY I

~ Describe Containment System

~ Definition of Terms

~ Objective of Reanalysis

~ Summarize 20th year Surveillance Results

~ Discuss Analysis Approach Models Methodology

~ Summarize Results

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I 116'nside Diameter 170'nside Height 3'-9" Thick Walls 3'-3" Thick Dome 10'-6" Thick Base Slab Oi

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(From Jan 1993 Meeting)

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AUXILIARY BUILDING EQUIPLIEHE HAECH UNIf 3 CONTAINMEt}T I

PERSONNEL HAICH CON fROL BUILDING I

I UNIT 4 CONTAINMENT I

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I'ERSONNEE IIAICH EQUIPllEHI HATCH TURBINE OPERATING DECK

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0 k..'S9 Hoop Tendons, 165 Dome Tendons, 180 Vertical Tendons-Each Tendon Consists of 90- 1/4" Wires

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P Lt Predicted Lower Limit PLL: Initial Prestress minus the initial and time dependent losses Minimum Re uired Prestress Level The level of prestress required by Analysis of the structure 20 40 T(gF (years)

Surveillance Tendon Lift-OffForce Must be Greater Than Predicted Loafer Limit (From Jan 1993 Meeting)

TECH SPEC SURVEILLANCE R

UR EN

~ Tech Spec sampling for.1st through 15th year surveillan'ce did not require random sampling

~ Tech Spec revised prior to 20th year surveillance

~ Tendon Sampling for 20th year was done using a random sampling

TECH SPEC SURVEILLAN E R

I ENT

~ Inspection Requirements:

-5 Hoop, 4 Vertical, 3 Dome Visual Inspections Laboratory Tests (Physical Char.)

Measure "LiftOff Force" (Fram Jan 1993 Meeting)

20th YEAR SURV ILLANCE

~ Physical Characteristics:

All Satisfactory

~ Several Hoo Tendons with Lift-Off p

Root Cause:

Higher relaxation rate than originally predicted,;.:::-.II:

- 1992 - 93 Evaluations:

Dt,remonstrated continued UFSAR compliance through 25th Year Surveillance

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20th YEAR SURV ILLANCE UL Summary of HOOP Tendon Lift-OffForce Results Total Tested

> PLL Unit 3 11 Unit4 95% to 100% of PLL 8

90% to 95% of PLL 4

< 90% of PLL (From Jan 1S93 Meeting) 0 1

89.6%

PLAN OF ACTIONS AFTER 20th YEAR SURVEILLANCE

~ Long Term Actions (from Jan 1993 Meeting)

Detailed reanalysis of Containment Structure Contingency Plan for other actions if required

~ Objective:

Demonstrate UFSAR compliance through the licensed life of the plant

A A

~ BSAP (Structural Analysis Program)

~ Three Dimensional Finite Element Model (Approx 2000 Plate Elements)

~ Dome, shell, base slab and soil springs included in Model

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A AL M

DEL

~ Licensing Basis Requirements Remain Unchanged Material Properties (UFSAR)

Loads (UFSAR)

Loading Combinations (UFSAR)

Acceptance Criteria (UFSAR)

R UFSAR LOAD COMBINATIONS:

-1. D+F+L+To

-2. D+F+L+P+Ta+E

3. D+ F+ L+1.15P

4. 1.05D+ 1.5P+ Ta+ F

5. 1.05D+ 1.25P+ Ta+ 1.25E+ F

6. 1.05D+ 1.25H+ R+ F+ 1.25E+ To

7. D+P+Ta+H+E'+F

8. D + H + R+ E'+ F + To

~ NOMENCLATURE

- D= Dead Load

- L = Live Load F = Effective Prestress Load

- P = Design Accident Pressure Load

- To = Thermal Load (Normal Op Temp)

Ta = Thermal Load (Acc Temp)

- E

= OBE Earthquake

- E' SSE Earthquake R = Pipe Rupture Force H = Force due to piping thermal expansion

A AL 1994 Analysis Enhancements 1967 Analysis 1994 Analysis Model Type 2-D Axisymmetric 3-D Model Elements Plane Strain Plate Major Penetrations Local Model Intregrated Model

FINITE ELEMENTANALYSIS BASIC CONTAINMENT MODEL BASEUNE ANALYSLS ADO PENETRATIONS COMPARE TO UF5AR RESULTS ANALYZE MODEL FOR NDYIOUAL LOADCA5ES UPS~ DESIGN BASIS LOAD COMBINATIONS CALCULATEELEMENT STRE5$ E5 FOR PIBMARY LOADINOS PERFO$ UiTHERMAL CRACKING ANALY5I5 UFSAR STRES~TRAIN CHECK IDENTIFYCRlllCAL ELEMENTS PERFORM REFINED THERMALCRACIGNO ANALYSIS

plass Pres load ss (nodal'o gnggor P (no adg toadA debar truss members)

Liner Plato Elements tendons (t

so members)

Boundary Condltfon:

Radial Rollers ttyp)

ANAL I

RE ULT Comparison of Level of Prestress at end of Licensed Life Hoop Dome Vertical Vendor Furnished 670 Kips l Ft 360 Kips i Ft 294 Kips / Ft Required by Analysis (1994) 590 Kips l Ft 492 Kips/ Tendon 313 Kips l Ft 531 Kips / Tendon 250 Kips / Ft 522 Kips lTendon

650 600 550 500 Most Conservative Regression Analysis

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(Att Unit 4 Hoop Tendon Surveillance Data 5th through 20th Year)

Predicted Tendon Force~

(12% Steel Relaxation)

Minimum Required Prestress Level 492 Kipa I Tendon End of I

I t License (41 Years)

I 10 Time (Years from SIT) 40 100

~ 1994 Reanalysis Acceptance Criteria - UFSAR Model representative of structure Correlated well to original analysis results Material properties - UFSAR Loading - UFSAR

RE UL U

AR

~ Analytical Results Containment Post Tensioning System is adequate beyond the Licensed Life of the Plant

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~ Summary

~ Future Activities

~ Submit a Reanalysis Summary Report

~ Schedule

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