ML021140079

Attachment 15, E-Mailed on April 22, 2002 (Docket Nos. 50-445 and 50-446). Slides for Zirlo Meeting

ML021140079
Person / Time
Site:	Comanche Peak
Issue date:	04/22/2002
From:	Jaffe D NRC/NRR/DLPM
To:	TXU Electric
References
Download: ML021140079 (4)

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Slides for ZIRLO Meeting Creation Date: 4/22/02 7:02AM From: David Jaffe Created By: DHJ@nrc.gov Recipients Action Date & Time txu.com Transferred 04/22/02 07:02AM dbuschbl (dbuschbl1 @txu.com)

Post Office Delivered Route txu.com Files Size Date & Time TXUZIRLOMTG.wpd 4934 04/18/02 03:37PM MESSAGE 620 04/22/02 07:02AM Options Auto Delete: No Expiration Date: None Notify Recipients: Yes Priority: Standard Reply Requested: No Return Notification: None Concealed

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No Security: Standard To Be Delivered: Immediate Status Tracking: Delivered & Opened Attachment 15

David Jaffe - Slides for ZIRLO Meeting Page 1 From: David Jaffe To: dbuschbl@txu.com Date: 4/22/02 7:02AM

Subject:

Slides for ZIRLO Meeting Please review the attached and we'll get a date for the meeting.

David Jaffe - TXUZI RLOMTG.wpd Page 1 David Jaffe TXUZIRLOMTG.wpd

- PaQe 1 DISCUSSION ITEMS FOR MAY MEETING WITH TXU RE: COMANCHE PEAK ZIRLO and IBFA FUEL MEETING PURPOSE:

1. CLARIFYING DISCUSSION OF ERX-2001-005-P, AND OF SIMULATION OF ZIRLO PROPERTIES IN NON-LOCA EVENTS IN COMANCHE PEAK ACCIDENT AND TRANSIENT ANALYSES.

2. CLARIFYING DISCUSSION OF SIMULATION OF IFBA IN COMANCHE PEAK ACCIDENT AND TRANSIENT ANALYSES.

ZIRLO PROPERTIES

1. PROVIDE CHARTS OR TABLES SHOWING HOW ZIRLO IS SIMULATED IN COMANCHE PEAK ANALYSES (INCLUDING SRP 5.2.2 ANALYSES).

2. DISCUSS HOW FUEL CLADDING PROPERTIES ARE CONSERVATIVELY TREATED IN COMANCHE PEAK ANALYSIS MODELS (IT IS POSSIBLE THAT FOR SOME EVENT ANALYSES THE MODEL ASSUMPTIONS MAY MAKE THE CLADDING SIMULATION IRRELEVANT).

3. JUSTIFY THE CLADDING PROPERTY VALUES ASSUMED IN ANALYSES WHERE PREDICTED FUEL BEHAVIOR IS PREDICTED TO ENTER REGIMES (E.G.

TEMPERATURES) OUTSIDE THE RANGE OF ZIRLO EXPERIMENTAL DATA (E.G.

THERMAL CONDUCTIVITY).

4. JUSTIFY THE EMISSIVITY VALUE GIVEN ON PG. 2-21.

5. WHY DO RODEX2 AND ANF-RELAP USE DIFFERENT VALUES FOR POISSON 'S RATIO?

(PG. 2-19

6. SECTION 2.3.

10.1 REFERENCES

FIGURE B-1 FROM WCAP-12610 AS BASIS FOR THE ZIRLO/ZIRCALOY CREEPDOWN RATIO ASSUMED IN RODEX2. PLEASE GIVE JUSTIFICATION THAT THIS IS INDEED IS APPLICABLE RATHER THAN THE HIGHER VALUES SHOWN AT HIGHER ELEVATIONS (WHERE THERE SEEM TO BE MORE DATA POINTS OR MORE TIGHTLY DISTRIBUTED DATA.)

7. THE RANGE OF DATA FOR ZIRLO THERMAL CONDUCTIVITY REQUIRES EXTRAPOLATION FOR MANY ANALYTICAL CASES. JUSTIFY THAT THE TXU EXTRAPOLATION IS APPROPRIATE, SINCE THE REFERENCED MODELS ARE NOT NECESSARILY THE SAME AS TXU'S.

8. PLEASE FURTHER EXPLAIN THE WAY YOU IMPLEMENTED FIGURE 2.8 AND 2.9 (THERMAL EXPANSION).

9. PLEASE EXPLAIN YOU BURST (COMPOSITE) MODEL (FIGURES 2.14 AND 2.15).

David Jaffe - TXUZIRLOMTG.wpd Page 2 IBFA

10. PLEASE DISCUSS THE IMPACT OF IBFA ON ACCIDENT AND TRANSIENT MODELS AND OPERATIONAL EXPERIENCE WITH IBFA. HOW MUCH EXPERIENCE IS THERE WITH IBFA/ZIRLO FUEL. DISCUSS HOW YOU PLAN TO PHASE IN THIS FUEL?