ML120610063

Intro for March 8, 2012 Public Meeting to Discuss GSI-191

ML120610063
Person / Time
Site:	South Texas
Issue date:	02/29/2012
From:	Kee E South Texas
To:	Balwant Singal Plant Licensing Branch IV
Singal, B K, NRR/DORL, 301-415-301
Shared Package
ML120610060	List: ML120610063 ML120610068 ML120610074 ML120610102
References
TAC ME7735, TAC ME7736
Download: ML120610063 (6)

Text

Introduction Introduction NRC Public Meeting on Risk-Informed Resolution of GSI-191 Topic: Head Loss Experiments 8 March 2012 Ernie Kee, STPNOC, keeej@stpegs.com Zahra Mohaghegh, Soteria Consultants, mohaghegh@soteriaconsultants.com 1/6

Introduction Attendees GSI-191 Analysis & Methodology Implementation (GAMI)

Craig Sellers, Alion Science and Technology Tim Sande, Alion Science and Technology Gil Zigler, Alion Science and Technology Containment Accident Stochastic Analysis (CASA Grande)

Bruce Letellier, Los Alamos National Laboratory Corrosion/Head Loss Experimental (CHLE)

Kerry Howe, University of New Mexico Janet Leavitt, University of New Mexico Oversight Zahra Mohaghegh, Soteria Consultants Seyed Reihani, Soteria Consultants The South Texas Project Steve Blossom Rick Grantom Ernie Kee Jamie Paul 2/6

Introduction Project Objectives Through a risk-informed approach, provide the necessary technical basis for the NRC to close the safety issues related to GSI-191 by the end of 2013 Understand and implement the necessary licensing requirements needed to support an exemption to certain requirements of 10 CFR 50.46 Follow and build upon previous successful regulatory actions such as:

14-day Diesel AOT 10 CFR 50.69 Exemption Request Initiative 4b, Risk Managed Technical Specifications The licensing approach is based on Regulatory Guide 1.174 Decision making is based on the difference in risk between a perfect design and the existing design 3/6

Introduction Computational Flow In the integrated model, developed in this project, Plant-specific PRA is located at the top level of system analysis CASA Grande provides estimates for the likelihood of three basic events of the plant-specific PRA by modeling their underlying physical phenomena and, by adding uncertainty analysis to the physical models 4/6

Introduction Computational Flow Chemical Effects, Debris loading, and Bypass have been modeled in CASA Grande The Risk-Informed closure team is developing plant-specific experiments to inform the models in CASA Grande 5/6

Introduction Meeting Materials and Summary Technical Document: Kerry Howe and Janet Leavitt, WORKING DRAFT: STP CORROSION HEAD LOSS EXPERIMENTS (CHLE) TEST PLAN REVISION 1.2 February 29, 2012 Technical Document: Gil Zigler, Tim Sande, and Craig Sellers, Test Plan for STP High Temperature Vertical Loop Testing, 261-8511, Revision C, 02/28/2012 Gil Zigler and Tim Sande, DRAFT Proposed STP Strainer Fiber Bypass Test Protocol (Based on 2/27/12 Draft Revised FPL Bypass Test Protocol), 02/29/2012 6/6