Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3...

44
WESTINGHOUSE NON-PROPRIETARY CLASS 3 Westinghouse Presentation on ZIRLO Characterization Plant (Slide Presentation of July 11, 2002) June 2002 © 2002 Westinghouse Electric Company All Rights Reserved

Transcript of Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3...

Page 1: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

WESTINGHOUSE NON-PROPRIETARY CLASS 3

Westinghouse Presentation on

ZIRLO Characterization Plant (Slide Presentation of July 11, 2002)

June 2002

© 2002 Westinghouse Electric Company

All Rights Reserved

Page 2: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Werstinghouse A BNFL Group company

Page 3: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

Westinghouse Electric Company

Presented by:

Hemant Shah and Ron Kesterson

July 11, 2002

, BNFL Slide 2 Westinghouse

()BNFL Slide 2 -~etinghouse

Page 4: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

* Meeting Objective

- Present Low Tin ZIRLOTM Characterization plan to support

license extension for Low Tin ZIRLOTM cladding consistent with

presentations to NRC in 2001 and 2002

- Obtain feedback on scope of planned efforts

8 BNFL Slide 3 O Westinghouse

Slide 3(,BN FL (SWestinghouse

Page 5: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

* Program Objective

- By performing Low Tin ZIRLOTM Characterization, we will

demonstrate that Low Tin ZIRLOTM is not a new material, but a

minor change within the technical envelope of a well-proven

ZIRLOTM cladding

Slide 4 O Westinghouse

9!BNFL Slide4 (OWestinghouse

Page 6: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

e Background

- Westinghouse intent to license Low Tin ZIRLOTM presented to NRC on

Oct 29, 2001

- Strategy to develop Low Tin ZIRLOTM characteristics database

defined

-Low Tin ZIRLOTM characteristics will be demonstrated to be

compatible with standard ZIRLOTM properties

- Westinghouse intent to license Low Tin ZIRLOTM and strategy

reiterated to NRC on May 14-1 5, 2002 semi-annual meeting

-General approach seemed reasonable

9 BNFL Slide 5 Westinghouse

Page 7: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

*DBNFL S 6Westinghouse

Changes in fabrication Benefit or impact

Change tin level range from [ Reduce Corrosion Ia, c

esting

Ex-core Provide data used in reload evaluation

In-core - Exposure in LTA Gather PIE data to validate models

and demonstrate benefits

Slide 6

Page 8: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plana, b, c

SO Westinghouse9BNFL Slide 7

Page 9: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

* Low Tin ZIRLO TM Ex-Core Testing

-Test Material

-ZIRLOTM with nominal tin content of [ ]a, c

-ZlRLOTM with nominal tin content of [ a, c

-Standard tin ZIRLOTM (C)

-Planned Tests -Physical properties

-Mechanical Properties -Microstructure

-High Temperature/LOCA Tests

GBNFL Slide8 9 Westinghouse

Page 10: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

* Summary of Basic Properties Characterization

Physical tests

Density

Emissivity - oxidized and unoxidized

Specific Heat

Thermal Conductivity

Thermal Expansion

Axial / longitudinal

Diametrical/hoop or transverse

Alpha-Beta Transition Temperature

Mechanical Tests:

Axial Mechanical Test:

Yield Strength

Ultimate strength

Elongation at failure

Modulus of elasticity

Poisson's ratio axial/diametral

* BNFL Slide 9 Is Westinghouse

Page 11: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

e Summary of Basic Properties Characterization (Cont'd) Hoop Burst Test:

Yield Strength

Ultimate strength

Strain at failure

Modulus of elasticity

Biaxial Burst Test:

Ultimate strength

Microhardness Traverse

Fatigue

Microstructure:

Particle Size

High TemperaturelLOCA tests:

Quench Tests

Ring Compression Tests

Metal-Water Reaction (High Temperature)**

Burst Test (Strain & Temperature @ burst)

LOCA creep

9 BNFL Slide 10 9 Westinghouse

Page 12: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

Physical properties

-Density (A, B) >) Immersion Method

• At Room Temperature with extrapolation to higher temperature based on measured value of thermal expansion

-Emissivity (A, C) >) Oxidized and unoxidized Condition

> ASTM Method C-835

• Minimum 500 C and maximum 1200 C

-Specific Heat (AB,C) o ASTM method E1269-01

> From Room Temperature to 1200 C

9)BNFL Slide 11 9)Westinghouse

Page 13: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

Physical properties (Cont'd)

-Thermal Conductivity (A, C) >) Modified Kohlaruse technique

)) Upto 1210C

-Thermal Expansion (A, B, C) >> Alpha-Beta Transition temperature

>> Axial/longitudinal

>> Diametral/Hoop >> From Room Temperature to 1200 C

e BNFL Sd2WestinghouseSlide 12

Page 14: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

a, b, c

8 BNFL Slide 13 O Westinghouse

()BNFL Slide 1 3 S)Westinghouse

Page 15: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

a, b, c

, BNFL Slide 14 Westinghouse

@,BNFL Slide 14 SIWestinghouse

Page 16: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

a, b, c

,lWestinghouseSlide 1 5(DBNFL

Page 17: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

Mechanical Properties (A, B, C)

-Axial Tensile Tests x> Properties:

Yield Strength Ultimate strength Elongation at failure Modulus of elasticity Poisson's ratio

• Temperatures: RT: Connect with large Production Certification databases and prior data 390 OF (200 0C) Intermediate temperature to improve temperature-property curves 660 and 725 OF (350 and 385 0C) Near operating temperature for a range of reactors. 111 0°F (6000C) Abnormal conditions.

9 BNFL Slide 16 $ Westinghouse

Page 18: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

Mechanical Properties (Cont'd)

-Hoop Burst Test: )) Properties:

Ultimate strength Elongation at failure Modulus of elasticity

Temperatures: RT, 390, 660, 725-F (RT, 200, 350, 385°C)

-Biaxial Burst Test: >> Ultimate strength

Temperatures: RT, 390, 660, 7250F (RT, 200, 350, 3850C)

*BNFL d1WestinghouseSlide 17

Page 19: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

Mechanical Properties (Cont'd)

-Fatigue (A) )> Room temperature

> Up to 10 million cycles * Tension and compression

>* 6 stress levels starting from [ I a, b, c at 20MPa interval

-Particle Size (A) "> Size and distribution of intermetallic phase particles "> Minimum of 100 particles to be photographed per sample

, BNFLSd 8Westinghouse

Slide 18

Page 20: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

High Temperature/LOCA Tests (A, C)

-Quench Tests x>Demonstrate acceptable cladding ductility under LOCA quench conditions.

>)Cladding will be rapidly oxidized in a high temperature steam environment to produce varying levels of oxide thickness.

))The sample will be quenched to room temperature by submersion in water.

*)BNFL Slide 19 Westinghouse

Slide 1 9 S)Westinghouse

Page 21: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

High Temperature/LOCA Tests

-Ring Compression Tests > Measure ductility retained by cladding following rapid oxidation.

> Cladding samples rapidly oxidized in a high temperature steam environment to produce varying levels of oxide thickness.

)> The oxidized samples will then be cut into rings and used as ring compression samples. )> Compression testing provides quantifiable ductility data for cladding that has been

severely oxidized.

SdWestinghouseSlide 20()BNFL

Page 22: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

High Temperature/LOCA Tests (Cont'd)

-Metal-Water Reaction (High Temperature) > Cladding samples will be oxidized at high temperature to produce a uniform

oxide coating

)> The weight gain of the oxide will be recorded , oxidation rates calculated and compared with previous ZIRLOTM data

e BNFL Slide 21 9 Westinghouse

Slide 21 S)Westinghouse

Page 23: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

High Temperature/LOCA Tests (Cont'd)

-Burst Test (Strain & Temperature @ burst)

»I [ ] sections of cladding are internally pressurized with argon.

> Rapid temperature transients are produced by infra-red heating of the cladding

to simulate LOCA conditions.

)> The burst temperature and physical condition of the tube following burst are

recorded and used to calculate strain at burst.

*BNFL Slide 22 Westinghouse

Slide 22 O)Westinghouse

Page 24: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

a, b, c

e BNFL Siide 23

O Westinghouse()BNFL Slide 23 ObWestinghouse

Page 25: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

a, b, c

, BNFL Slide 24 O Westinghouse

Slide 24()BNFL $•Westinghouse

Page 26: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

High Temperature/LOCA Tests (Cont'd)

-LOCA creep

)> Cladding tube sections are held at a constant temperature and pressure.

>> Temperatures will be chosen to provide test in all the alpha , alpha/beta , and

beta phase ranges.

>> The diametral strain of the cladding will be measured as a function of time

providing data about the creep behavior of the alloy.

>> Testing different temperature and pressure combinations will provide data on

the cladding creep performance under LOCA conditions.

0BNFL Slide 25 9 Westinghouse

Page 27: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

* Low Tin ZIRLO TM Licensing

-A complete set of ZIRLOTM base material properties updated with Low Tin

ZIRLOTM

-Regions will be licensed to all current criteria. Current models will be justified and compared to test data. Information will be submitted for review and approval in addenda to WCAP-1 2610-P-A and CENPD 404-P-A to expand ZIRLOTM definition to cover low tin condition for region introduction

O Westinghouse* BNFL Slide 26

GBNFL Slide 26

Page 28: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

e Planned Changes in ZIRLO TM Specification

-Are minor - similar to past changes in Zirc-4

-Provide greater corrosion margin and higher fuel duty capability

-Will be submitted for review in addendum's to existing topicals with

updated material properties

- WCAP-1 2610-P-A and CENPD 404-P-A

9 BNFL Slide 27 9 Westinghouse

Page 29: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

a, b, c

*,BNFL Sd2WestinghouseSlide 28

Page 30: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

9 Byron LTA 1st Cycle (high Duty, High FDI) Rod oxide Data Summary

* Low tin ZIRLOTM: [

* Standard ZIRLOTM: [

e BNFL Slide 29

O Westinghouse

a, c

I a, c

Slide 29()BNFL S)Westinghouse

Page 31: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization Plan

* Low Tin ZIRLOTM

Planned Schedule

Introduction

-First NRC meeting to layout planned licensing path

-Low Tin ZIRLOTM Characterization plan

-Submit Low Tin ZIRLOIM Addenda to -WCAP-1 261 0-P-A -CENPD 404-P-A

-NRC Approval of Low Tin ZIRLOTM Addenda

-Region introduction of low tin ZIRLOTM

"* Oct 29, 2001

"* July, 2002

"* Dec. 2002

o July, 2003

I a, c

Slide 30 9 Westinghouse

9BNFL Slide30 O•Westinghouse

Page 32: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

ZIRLOTM Characterization

* Summary

* Low tin ZIRLOTM Characterization consistent with earlier presentations

"* Basic material properties characterization will be expanded

"* Low Tin ZIRLOTM characteristics will be demonstrated to be compatible with standard ZIRLOTM

properties and submitted as addenda to current WCAPs (WCAP-1 261 0-P-A, CENPD 404

P-A)

9 BNFL Slide 31 9 Westinghouse

Page 33: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

WESTINGHOUSE NON-PROPRIETARY CLASS 3

Westinghouse Presentation on

DNB Testing (Slide Presentation of July 11, 2002)

June 2002

© 2002 Westinghouse Electric Company All Rights Reserved

Page 34: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

We inghouseA BNFL Group company

Page 35: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

Westinghouse DNB Testing

Gerald July 11

Sieradzki ,2002

S 2Westinghouse*BNFL Slide 2

Page 36: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse Non-Proprietary Class 3

Westinghouse DNB Testing

Outline

9 Closing of Columbia Test Facility

o Requ

(HTRF)

irements of DNB Testing

"* Alternate Test Facilities

"* Westinghouse Qualification* Potential

Process

Licensing Applications

, BNFL Slide 3 �) WestinghouseO)WestinghouseSlide 3

Idook,

AlghBNFL %v

Page 37: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse DNB Testing

Closing of Columbia HTRF

* Columbia HTRF is closing down by 6/30/03

* All W DNB test data supporting NRC - approved DNB correlations were obtained from HTRF

* Closing down of HTRF has major impacts on analysis in the U.S.

future safety

8 BNFL Slide 4 Westinghouse

tOWestinghouseSlide 4G•BNFL

Page 38: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse DNB Testing

Requirements of DNB Testing

* W uses NRC-approved FCEP (WCAP-1 2488-A) fuel design changes

for evaluating

e Fuel changes not covered by FCEP may requ ire DNB testsa,c

, BNFL Slide 5 Westinghouse

O•WestinghouseSlide 5GpBNFL

Page 39: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse DNB Testing

Alternate Test Facilities

o W is actively evaluating alternate DNB test facilities

9 All alternate facilities are [. Primary facility under consideration is[

I a,c

. Backup facilities include:a,c

- Other facilities

I a,c

O)WestinghouseSlide 6GBNFL

Page 40: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse DNB Testing

Westinghouse Qualification Processo Over the years, W has developed a process for qualifying test

facilities and data for safety analyses - Personnel qualification - Testing procedures - Data collection and reduction

- Test bundle manufacturi ng, etc.

Slide 7 Westinghouse

* BNFL O•WeslinghouseSlide 7

Page 41: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse DNB Testing

Westinghouse Qualification Process (continued)

* The process was applied to Columbia HTRF and [ ] a,c

* This same process will be applied to alternate test facilities

* NRC participation during qualification DNB testing of an alternate facility is welcomed

Slide 8 Westinghouse

* The process will include Ia,c

[

* BNFL O)WestinghouseSlide 8

Page 42: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse DNB Testing

Potential Licensing__Applications

"* DNB test data collected from an alternate test facility will meet W QMS requirements

"* DNB test data on future fuel designs will be used forualification of 95/95 DNBR limit

- An existing NRC-approved DNB correlation - Minor adjustment to a DNB correlation - A new DNB correlation

Slide 9 Westinghouse

q

*BNFL -etinghouseSlide 9

Page 43: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

Westinghouse DNB Testing

Summary

"* Because of the closing down of Columbia HTRF, W is evaluating alternate DNB test facilities to meet regulatory requirements for future fuel design changes

"* W intends to apply its proven qualification process to any alternate test facility

"* DNB data from an alternate test facility will be used for justifying the 95/95 DNBR limit of a DNB correlation

SBNFL Slide 10 O Westinghouse

Page 44: Westinghouse Presentation on ZIRLO Characterization Plant ...Westinghouse Non-Proprietary Class 3 ZIRLOTM Characterization Plan e Background - Westinghouse intent to license Low Tin

WeinghouseA BNFL Group company