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Home NRC Library Document Collections Advisory Committee on Reactor Safeguards Meeting Schedule and Related Documents 2001

ACRS Thermo-Hydraulic Phenomena Subcommittee Meeting - August 22-23, 2001

ADVISORY COMMITTEE ON REACTOR SAFEGUARDS
THERMAL-HYDRAULIC PHENOMENA SUBCOMMITTEE MEETING:
GE NUCLEAR ENERGY TRACG CODE APPLICATION TO AOO's,
EPRI REPORT- RESOLUTION OF GL96-06 WATERHAMMER ISSUES
AUGUST 22-23, 2001
ROCKVILLE, MARYLAND

Contact: P. Boehnert (301-415-8065 "pab2@nrc.gov")

PRESENTATION SCHEDULE

August 22, 2001

  TOPIC SPEAKER TIME
I. Reconvene/Opening Remarks T. Kress,
Acting Chairman		 8:30 a.m.
II. GE Nuclear Energy TRACG Code for Anticipated Operational Occurrences    
  A. NRC Staff Presentation (Open) R. Landry, NRR 8:45 a.m.
    1. Introduction and Background
    2. Safety Evaluation Report
      - Review Scope
      - Methodology
      - Lessons Learned from Exercise Of GE TRACG Code
      - Review of Uncertainty Evaluation
      - Results and Conditions (if any)
      - Conclusions
    3. Concluding Remarks
  B. GE Nuclear Energy Presentation (Open/Closed?)   12:30 p.m.
    1. Introduction J. Andersen, GNF,et al.  
    2. Response to Subcommittee    
      Comments (11/13-14/00 Mtg.)
Regarding the TRACG Code
Correlations & Models (see list - below) 		   
    3. Comment on NRC TRACG SBWR Review
    4. Concluding Remarks
III. Subcommittee Caucus (Open)   4:00 p.m.
    1. Comments on Meeting Presentations    
    2. Follow-on Actions    
    3. Decision to Bring Review to ACRS

    
IV. Recess   4:30 p.m.

Comments on TRACG Code Models/Correlations -
November 13-14, 2000 ACRS T/H Phenomena Subcommittee Meeting
 
  • The momentum equations do not appear to properly account for Reynolds stress.
  • The origin of the equations are not clearly specified pursuant to the regulatory position in the draft regulatory guide on code submittals.
  • Partition of wall shear stress in not treated consistently in the documentation
  • The modeling of Tee components is not clearly explained and its adequacy is not apparent.
  • There is no definitive modeling of flow regime transition, and the logic of this modeling is not clear.
  • Regarding the interfacial shear model, key terms in the equations are not explained, in particular the relationship between the "ci" and "c0" terms needs to be clarified.
  • GE has an inconsistent treatment for modeling of interfacial area and the heat transfer coefficients.

August 23, 2001

V. Reconvene/Opening Remarks T. Kress,
Acting Chairman 		8:30 a.m.
VI. Resolution of GL 96-06 Waterhammer Issues (Open /Closed)    
  A. NRC/Industry Resolution Approach (ePRI Study)- Summary J. Tatum NRR/DSSA/SPLB 8:45 a.m.
  B. Revised EPRI Report - Evaluation of GL 96-06 Waterhammer Issues and Resolution of Comments From 1.16-17/01 Subcommittee Meeting V. Wagoner (CP&L)
A. Singh (EPRI)
T. Esselman (Altran)		 9:00 a.m.
  C. NRC Review of EPRI Report - Results, Open Issues, Resolution Approach and Conclusions J. Tatum 11:30 p.m.
  D. Concluding Remarks EPRI/NRC 12:30 p.m.
VII. Subcommittee Caucus (Open)   12:45 p.m.
    1. Comments on Meeting Presentations    
    2. Follow-on Actions    
    3. Decision to Bring Review to ACRS    
VIII. Recess   1:00 p.m.

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