1. PWR Sump Performance (GSI-191) Industry Workshop
Hyatt Regency, Baltimore, Maryland
October 18-19, 2012
Mark Richter
Senior Project Manager
Nuclear Energy Institute

2. GSI-191 Industry Workshop
Workshop Objectives
Provide guidance and information to PWR licensees to assist in the resolution and closure of this long-standing issue.
Provide the range of closure path options and applicability relative to SECY
Provide an opportunity for open discussion with peers and NRC staff to resolve questions and identify remaining issues.

3. GSI-191 Industry Workshop
Workshop Focus
Industry and Regulatory Perspectives
PWROG Closure Plan, STP Risk-Informed Project, and other coupled deterministic and risk-informed closure options
Bypass Testing, Defense-in Depth and Mitigation Strategies, and Operability Determination
Closure Option Templates based on options in SECY for Year-End Submittals

4. GSI-191 Closure Options
Option 1: Compliance with 10 CFR Based on Approved Models
Attributes and Requirements
Ideal for low/no fiber plants that meet “Clean Plant Criteria” or plants that can meet the 15 grams per fuel assembly fiber limit associated with WCAP r. 2
Must demonstrate compliance with 10 CFR 50.46
Must comply with any additional conditions imposed through the anticipated SE for WCAP r. 2
Additional margin may be achieved later based on current PWROG testing results
Required plant actions must be completed within two refueling outages after January 1, 2013

5. GSI-191 Closure Options Option 2: Deterministic or Risk-Informed
Graded approach with actions based on amount of fibrous insulation
Plants must implement defense-in-depth and mitigation measures to offset residual risk while testing and/or modifications are completed (Plants may reference the NEI March 5, 2012 letter to NRC summarizing these measures)
Option 2 offers a deterministic or risk-informed path for resolution and closure

6. GSI-191 Closure Options Option 2a: Deterministic Resolution Path
Attributes and Requirements
Actions taken based on amount of fibrous insulation
Apply results of new PWROG test program to provide basis for new in-vessel criteria
Anticipate new in-vessel criteria will minimize or eliminate the need for additional plant modifications
Testing and plant modifications are to be completed within three refueling outages after January 1, 2013

7. GSI-191 Closure Options Option 2b: Full Risk-Informed Resolution Path
Attributes and Requirements
Utilize risk-informed methods piloted by STPNOC-Risk assessment models and plant-specific testing support assumptions
Plant-specific resolution schedule established with NRC
Anticipate license amendment request submitted by December, 2015.
All testing and analysis to support assumptions complete within two RFOs after January 1, 2013
If risk-informed approach is determined to not be feasible, deterministic resolution will be completed by third RFO after January 1, 2013

8. GSI-191 Closure Options
Option 3 Different Regulatory Treatment for Suction Strainer and In-Vessel Effects
Attributes and Requirements
Separate resolution paths for strainers and in-vessel effects
Strainer resolved deterministically, in-vessel resolved by risk-informed or yet to be defined methods
Requires identification of defense-in-depth measures to mitigate risk while testing, and modifications are completed
Deterministic scope to be complete within two RFOs after January 1, 2013 and the risk-informed scope consistent with the schedule defined by Option 2b.
The NRC is interested in identifying a plant(s) to pilot this conceptually defined option

9. GSI-191 Industry Workshop Topical Agenda
Thursday October 18th
Introductions and Opening Remarks
NRC Perspectives on Closure
PWROG Closure Plan
PWROG Perspective on Closure
GSI-191 Downstream Effects Resolution Path
GSI-191 Downstream Effects –Alternate Flow Paths
PWROG Closure Plan Panel Discussion w/Q&A
Risk-Informed Approach
Risk-Informed Approach Panel Discussion w/Q&A
Closing Comments

10. GSI-191 Industry Workshop Topical Agenda
Defense-in –Depth, Mitigation Measures
Bypass Testing Attributes and Recent Bypass Testing Results
Bypass Testing
STP Testing with NEI Debris Preparation
Bypass Testing NRC Perspective
Friday October 19th
Opening Remarks: Agenda Review and Re-focus
Option 3 (Reg. Guide and Other Approaches)
Risk-Informing In-Vessel Effects
Risk-Informed Approach for GSI-191 Resolution

11. GSI-191 Industry Workshop Topical Agenda
Template Overview for All Closure Options
Option 1 – Beaver Valley
Option 2a – Farley
Option 2b – Vogtle
Option 3 – Point Beach
Operability Determination Approaches
Assuring Regulatory Certainty Through Technical Specifications
Operability Determination Template
Panel Discussion on Closure Strategies w/Q&A
Closing Comments