ML102010021
| ML102010021 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/14/2010 |
| From: | Virginia Electric & Power Co (VEPCO) |
| To: | V Sreenivas Plant Licensing Branch II |
| Sreenivas V.NRR/DORL/LPL2-1 415-2597 | |
| References | |
| Download: ML102010021 (11) | |
Text
North Anna Westinghouse RFA-2 Fuel Transition July 14, 2010
Objectives
- 1) Discuss Dominions Licensing Approach for Transitioning to the Westinghouse RFA-2 Fuel Product at North Anna 2
- 2) Provide Dominions Schedule of Submittals Required to Support the North Anna Fuel Transition
- 3) Discuss NRC Resources for November 2011 BELOCA Approval
Fuel Product Description
- Westinghouse Robust Fuel Assembly 2 (RFA-2)
- Removable Top Nozzle
- Zirconium Diboride (ZrB2) Integrated Fuel Burnable Absorbers (IFBA)
- Reduced Rod Bow Inconel Top Grid
- Intermediate Flow Mixing Grids (3)
- Inconel Protective Grid
- Oxide Coated Cladding on Bottom Six Inches
- Debris Filter Bottom Nozzle
Licensing Approach
- Fuel Criteria Evaluation Process (FCEP) -
NSD NRC 97 5189
- LTR-NRC-01-44
- LTR-NRC-02 Applicability of WRB-2M DNB correlation to 17x17 RFA-2 fuel with or without IFM grids
Licensing Approach
- Required NRC Submittals
- 1. Optimized ZIRLO - fuel cladding material 5
- 2. VIPRE-D WRB-2M DNB Correlation Implementation
- 3. BELOCA Methodology (WCAP-16009-P-A)
Schedule / Milestones
- Transition is Approximately 50% Complete
- North Anna RFA-2 Implementation
- N1C23 Spring 2012 6
N1C23 Spring 2012
- N2C23 Spring 2013
- Optimized ZIRLO Submittal
- Currently with the NRC (Dominion Letter No.10-205, May 6, 2010)
- Requested NRC Approval May 2011
Schedule / Milestones
- VIPRE-D WRB-2M Correlation
- Submit to NRC July 22, 2010
- Requested NRC Approval July 2011 7
- BELOCA Analysis
- Submit to NRC November 2, 2010
- Requested NRC Approval November 2011
- Working with Vendor to Improve Submittal Schedule
BELOCA Analysis
- ASTRUM methodology used for Best-Estimate LBLOCA analysis of RFA-2 fuel 8
- T.S. change adds ASTRUM analytical methodology topical report WCAP-16009-P-A to T.S. 5.6.5.b in support of core limits
- Heat Flux Hot Channel Factor (FQ(Z))
- Nuclear Enthalpy Rise Hot Channel Factor (FN H)
- Analysis description comparable to Surry submittal
- Dominion letter 06-936 dated 11/16/06
- NRC Safety Evaluation Report dated 9/6/07
BELOCA Analysis
- Approved BELOCA Methodology
- WCAP-16009-P-A with one exception
- 9 node downcomer model 9
- 3 axial nodes/radial segment aligned to each RCS loop
- Improved resolution of downcomer boiling phenomenon
- Multi-node model in ASTRUM approved by NRC for D.C. Cook (12 nodes for 4 RCS loops)
- Format of North Anna T.S. COLR reference like D.C. Cook (ADAMS ML082670351)
BELOCA Analysis
- Unit-Specific Analyses
- Unit 1 - Upflow baffle/barrel configuration
- Unit 2 - Downflow baffle/barrel configuration U it ifi d l d f R
li ti L 10
- Unit-specific models used for Realistic Large Break LOCA analysis of AREVA Advanced Mark-BW fuel (UFSAR Section 15.4.1)
- FQ(Z) = 2.32
- FN H = 1.65
Questions?
Questions?
11