ML20137Y829

Discusses 990715 Meeting with GE Nuclear Energy to Discuss GE Plans for Applying Tracg Code Methodology for Use in BWR Anticipated Operational Occurrence Transients.List of Attendees & Matl Used in Presentation Enclosed

ML20137Y829
Person / Time
Issue date:	07/28/1999
From:	Stephen Dembek NRC (Affiliation Not Assigned)
To:	Richards S NRC (Affiliation Not Assigned)
References
NUDOCS 9908030161
Download: ML20137Y829 (27)

Text

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"% UNITE 3 STATES o n NUCLEAR REGULATORY COMMISSION WASHINGTON. 0.c. sotewoot l \, e . . . + /

July 28, 1999 MEMORANDUM TO: Stuart A. Richards, Director

! Project Directorate IV & Decommissioning Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: Stephen Dembek, Chief Section 2,- g

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4 T l Project Directorate IV & Decommissioning -

D! vision of Licensing Project Management Office of Nuclear Reactor Regulation 4

SUBJECT:

MEETING WITH GE NUCLEAR ENERGY ON TRACG THERMAL HYDRAULIC METHODOLOGY i On July 15,1999, the Nuclear Regulatory Commission (NRC) staff met with GE Nuclear Energy (GE) to discuss GE's plans for applying the TRACG code methodology for use in boiling water reactor (BWR) anticipated operational occurrence (AOO) translents. The list of meeting attendees is attached (Attachment 1).

On June 18,1999, GE sent the NRC report NEDC 32900P,"TRACG Licensing Application Framework for ADO Translent Analyses." This document provided a framework for the approach to be used for obtaining the NRC's approval of the TRACG methodology. GE requested this meeting to obtain the NRC staff's feedback on the approach before the next series of topical reports are submitted. GE stated they plan to submit their proposed methodology in an October 1999 topical report and they will be requesting NRC concurrence that the TRACG methodology is acceptable for use in evaluating BWR AOO transients by July 2000. GE stated that they would be the sponsor of this topical report (it will not be submitted by a utliity).

During the course of the meeting, the NRC staff provided the following feedback to GE:

1. The staff commented that the references made to methodology reviews for the simplified BWR (SBWR) did not apply to BWR 2 through 6 designs. The SBWR reviews specifically did not consider BWR features and phenomena which were specific to the BWR 2 6 product line and were not included in the SBWR, As a result, the staff believen that the GE characterization of the status of these " reviews"is optimistic.

2. The framework provided in NEDC 32900P is a good planning tool for the NRC. [

However, the difficulty will be in the implementation of the plan.

3. Barring unforeseen changes in NRC staff priorities, the NRC will be ready to review the g l )q' topical report as soon as it is submitted, if GE submits the topical report in October 1999, the staff plans to complete their acceptance review by January 2000. To ensure 3 completing the review by July 2000, GE should ensure prompt responses to any requests for additional information (RAl).

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4. The NRC staff proposed another meeting on this subject in January 2000 prior to issuing a formal RAl.

5. The NRC will need the actual code to allow the staff to test the code.

The slides used by GE are attached (Attachments 2 and 3). Three of the slides in Attachment 3 are considered proprietary information and are not included.

Attachments: 1. Attendance List

2. Intro and Agenda Slides

3. Appilcation Methodology Slides cc w/att 1: See next page I

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• i GE Nuclear Engineering oc w/stt 1:

Joseph F. Quirk, Manager Industry Programs GE Nuclear Energy 175 Curtner Avenue San Jose, CA 95125 George B. Stramback Regulatory Services Project Manager GE Nuclear Energy 175 Curtner Avenue '

I San Jose, CA 95125 I

James F. Klapproth, Manager Engineering & Technology GE Nuclear Energy 175 Curtner Avenue San Jose, CA 95125 Charles M. Vaughan, Manager Facility Licensing GE Nuclear Energy P.O. Box 780 Wilmington, NC 28402 Glenn A. Watford, Manager Nuclear Fuel Engineering GE Neclear Energy P.O. Box 780 Wilmington, NC 28402

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NRC/GE NUCLEAR ENGINEERING MEETING ON TRACO l LIST OF ATTENDEES I -

July 16,1999 NAME ORGANIZATION Jared Wermiel Office of Nuclear Reactor Regulation / Division of Systems Safety and Analysis / Reactor Systems Branch (NRR/DSSA/SRXB)

Stephen Dombek NRR/ Division of Licensing Project Management TonyUlses NRR/DSSA/SRXB George Thomas NRR/DSSA/SRXB Ralph Caruso NRR/DSSA/SRXB

• l Ralph Landry NRR/DSSA/SRXB  ;

Muhammad Razzaque NRR/DSSA/SRXB I Jim Klapproth GE Charles Heck GE '

Jens Andersen GE

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! GE Nuclear Energy l

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l Introduction and Agenda i

l TRACG Methodology >

For Application to BWR l Transient Events 1

! Presentation to USNRC James F. Klapproth a

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! July 15,1999 /

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Agenda i

i e introduction 9:00-9:15

- Meeting Objectives

- Overview of Scope - ,

- Milestones Status and Schedule

• TRACG Application to BWR Transients 9:15-9:45

, - Proposed Application Methodology ,

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- Review of GE Submittals

< e Discussion and Action items 9:4H4oon l

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7/15/99 2

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Meeting Objectives

• Summarize Proposed Application Methodology .

• Review Schedule for LTR Submittals and NRC Review

• Obtain NRC Feedback and Concurrence that the Proposed Application Methodology and the Proposed Documentation are Acceptable NRC Concurrence in a Process that Results in NRC SER by July 2000 7/15/99 3

TRACG Transient Application Status

• Previous Submittals to the NRC .

- Presentation of " Plan for Application of TRACG to BWR AOO

Transients" to the NRC May 25,1999 -l

- Submittal of TRACG Licensing Application Framework for AOO Transient Analyses, NEDO-32900P, June 1999 Transmitted to the NRC on June 18,1999 l Description of Proposed Application Methodology Outline of Licensing Topical Reports Roadmap for Review Process 4

i 7/15/99 4 .

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TRACG Application Review Scope

• What is in Scope? .

- Application only to BWR-2 through BWR-6 .

- Application to Anticipated Operational Occurrences (AOO)

• What Is Not in Scope?

-LOCA/ECCS Analysis

- Containment Response Require Separate

- ATWS L Application Methodology

- Rod Drop Accident and separate submittals

- Application to ABWR or SBWR a l

! 7/15/99 5 i

Approach

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Rev.1 Rev.1 Rev.O Reviewed by NRC Reviewed by NRC Will document transient application Rev. 2 Rev.2 methodology To be issued 10/99 To be issued 10/99 To be issued 10/99 Incorporates RAls incorporates RAls Approach similar to Deletes SBWR Deletes SBWR ODYN Safety Models Qualification Studies Evaluation Primary NRC Review is existing RAI Resolution and Application Methodology 7/15/99 6

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Expected Outcomes i,

• Output from the NRC - One SER for TRACG Application to .

l BWR AOOs l

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• At this Meeting - NRC Concurrence that the Proposed l Application Methodology for Application of TRACG to BWR l AOO Transient is Acceptable

! - Maximum use of previous NRC RAls i - Focus NRC review on new materials i

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! 7/15/99 7 i

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! i Key Milestones i

i l Date Milestone Status .

! 5/99 GFJNRC Kickoff Meeting Completed 6/99 Submit Licensing Application Completed i i Framework Document 4 ,

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7/99 NRC Concurrence with Methodology Approach and Review Plan 10f99 LTR Submittals i 7/2000 SER for TRACG Transient Application .

I 7/15/99 8 1

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TRACG Application for BWR Transients - Objective i

o Previous Submittals to NRC .

- Plan for Application of TRACG to BWR AOO Transients Presented to NRC May 25.1999

- TRACG Licensing Application Framework for AOO Transient Analyses, NEDC-32900P, June 1999 Transmitted to NRC on June  !

18,1999 Description of proposed application methodology Outline of Licensing Topical Reports

• Objective for this Meeting

- Summarize Proposed Application Methodology and Clarify any NRC Concems/ Questions l - Obtain NRC Feedback and Concurrence that the Proposed

! Application Methodology and the Proposed Documentation is l Acceptable i

- Review Schedule for LTR Submittals and NRC Review L

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1 Scope: Application of TRACG for BWR Transients

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• Plants: B W R/2/3/4/5/6

• Events: Anticipated Operational Occurrences (Transients) -f o

- Increase / Decrease in Reactor Pressure ,!

- Increase / Decrease in Core Flow

- Increase / Decrease in Reactor Coolant inventory i

- Decrease in Core Coolant Temperature

- Same Events as Currently Approved for ODYN l

• Documentation

- TRACG Licensing Application Framework for AOO Transient Analyses

- TRACG Model Description LTR, NEDE-32176, Revision 2  !

! - TRACG Qualification LTR , NEDE-32177, Revision 2 I - TRACG ~ Application LTR for AOO Transient Analyses l i l

• Review Scope

- One SER for Application of TRACG to BWR AOO Transients i i

Applicability of TRACG for AOO Transients

! - Qualification ,

l Application Methodology for AOO Transients

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I . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ . __ _ _ _ _ _ _ _ . _ _ _ _ - _ _ _ .

TRACG Application Framework for ACO Transients

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s TRACG Code -

INTERNAL DOCS.

REQUREMENTS l

, AND GUIDEUNES j 4

Application Methodology GE Proprietary Material Removed i GE Proprietary Material removed 5

Approach l

Scenario Specification BWR AOO Transients

, Plant Selection BWR/2-6 i, Phenomena identification and Ranking NEDE-32900P Table 3-2 -

Frozen Code Version TRACG02A -GE Program Library Code Documentation NEDE-32176P Rev. 2 l Code Applicability NEDE-32900P Table 3-3

Assessment Matrix NEDE-32900P Table 3-4 Plant Nodalization NEDE-32177P Rev. 2 l Code and Experimental Accuracy NEDE-32176P Rev. 2, NEDE-32176P Rev. 2, ,

3 Application "_3e:-logy LTR l

a Effect of Scale None - Assessed on Full Scale Plant Data Plant Input and State Application Methodology LTR

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l Sensitivity Calculations Application Methodology LTR All important Model and Plant Parameters Combined Bias and Uncertainty Application "_^ie:&qy LTR ANOVA or Order Statistics Total Uncertainty Application Methodology LTR I

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l Phenomena identification and Ranking (PIRT) ~

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eldentification of Allinvolved Phenomena ~

- All BWR AOO Transient Event Categories

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- Grouped by Plant Region

• Ranking of Phenomena

- High

Significant impact on Transient

- Medium: Small impact on Transient i - Low: Insignificant impact on Transient

! - N/A: Not Present for Transient

• All High and Medium Ranked Phenomena included in

Application Methodology j

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O TRACG Model Capability NEDE-32900P Table 3-3 Model Elements .

NEDE-32176 Rev.2 .

Section Number Phenomena Cross Reference ,

e Structure  %"""

- Capability to model plant geometry -

e Basic Equations

- Capability to address global processes

• Models and Correlations ""Li m

- Capability to model and scale individual processes

• Numerical Methods

- Capability to perform efficient and reliable calculations 8

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TRACG Qualification NEDC-32900P Table 3-4 j Qualification Basis -

NEDE-32177 Rev.2 .

Section Number O Phenomena Cross Reference Q_

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• Qualification i - Separate Effects Tests

- Component Performance Data

! - Integra! System Effects Tests REQUIREMENTS

- Full Scale Plant Data

• Determination of Adequacy of TRACG Models

• Determination of Model and Experimental Uncertainty

• ameter be eined n TR -

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Licensing Criteria for AOO Transients - OLMCPR GE Proprietary Material Removed 11

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l l Submittals to NRC -

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• Model Description LTR

• Qualification LTR .

NEDE-32176P Rev. 2 NEDE-32177P Rev. 2

1. Introduction 1. Introduction

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2. Modular Structure 2. Qualification Strategy l 3. Thermal-Hydraulic Model 3. Separate Effects Tests

4. Heat Conduction Model - Model and experimental uncertainty j 5. Flow Regime Map 4. Component Performance Tests l 6. Models and Correlations 5. Integral System Effects Tests j - Range of applicabili4 6. BWR Plant Nodalization

-""""'"* 7. Plant Data

- Implementation

7. Component Models S. Conclusions

8. Numerical Methods

9. Three-Dimensional Review only sections

! Neutron Kinetics Model I relevant for application l

10. Control System to AOO transients 12

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Submittals to NRC -

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e Application Methodology LTR identify which parts of -

Model and Qualification l

1. Approach i LTRs need review for  !

TRACG application to

2. Introduction AOO transients

3. Requirements and Capabilities

- NEDC-32900P TaNe 3 Phenomena identification and Ranking TaMos

- NEDC-32900P TaNe 3 Cross Reference to Model Description LTR

4. Assessment and Ranging of Parameters

- NEDC-32900P Table 3 Cross Reference to Qualification LTR  ;

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- Model and Experimental Accuracy

5. Sensitivity and Uncertainty Analysis

6. Combination of Uncertainties

7. Results

8. Conclusions

9. References I

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Requested Output from NRC i

• One SER for Transient Application .

For Example:

! TRACG is Applicable for BWR AOO Transients and can be

! Used for Design and Licensing Calculations when Following the Process Described in the Application Methodology LTR 14 j

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n- j j Requested Actions at this Meeting i

• NRC Concurrence that the Proposed Application .

Methodology for Application of TRACG to BWR AOO ,

Transients is Acceptable. -

- Approach

- Phenomena identification and Ranking Tables

- Statistical Methodology

- Licensing Criteria

- Proposed Documentation

• GE will Continue to Produce and Submit Remaining LTRs 15

. . ..a S. Richards 2- July 28, 1999

4. The NRC staff proposed another meeting on this subject in January 2000 prior to issuing a formal RAl.

5. The NRC will need the actual code to allow the staff to test the code.

The slides used by GE are attached (Attachments 2 and 3). Three of the slides in Attachment 3 are considered proprietary information and are not in Juded.

Attachmcots: 1. Attendance List

2. Intro and Agenda Slides

3. Application Methodology Slides cc w/att 1: See next page DISTRIBUTION:

Hard Coov Docket File PUBLIC PDIV 2 R/F OGC ACRS EMail SCollins/RZimmerman BSheron/WKane JZwolinski/SBlack EPeyton RLandry GThomas TUlses RCaruso JWermiel GHolahan/TCollins GTracey, EDO Document Name: g:\PDIV-2\GE\msum0715.wpd OFFICE PDIV-2/SC PDIV-2/LA SRKB/BQ NAME SDembek:sk, , EMN JWfmiIl DATE 7/23/9&D 7G3/99 7 /N/99 OFFICIAL OFFICE COPY I

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