ML16125A009
| ML16125A009 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 05/03/2016 |
| From: | Craft W Dominion Nuclear Connecticut |
| To: | Richard Guzman Plant Licensing Branch 1 |
| Guzman R | |
| References | |
| TAC MF7624 | |
| Download: ML16125A009 (13) | |
Text
Millstone Power Station Unit 2 Upgrade to AREVA Standard CE14 HTP Fuel Assembly Pre-Submittal Teleconference for Realistic Large Break LOCA License Amendment Request May 3, 2016
Pg. 2 Agenda 1)
Background Information: MPS2 Fuel Product Upgrade 2)
Background Information: LAR for LBLOCA Analysis 3)
Scope and Content of LAR and Licensing Report 5)
Future Dominion/NRC interactions
Pg. 3 Background on MPS2 Fuel Product Upgrade
- Long-term MPS2 project with NRC kickoff meeting in July 2013 (ADAMS ML13207A259)
- Implementation in Cycle 25 (Spring 2017)
- AREVA Standard CE14 HTP Fuel Assembly upgrades to the current MPS2 fuel product:
- M5 cladding
- Advanced fuel rod geometry
- Zircaloy-4 MONOBLOC' guide tubes
- M5 cladding is a safety improvement and will be credited for 10 CFR 50.46c compliance in the future
Pg. 4 Background on LAR for LBLOCA Analysis July 17, 2013 Fuel Upgrade project kickoff meeting with NRC
- Current LBLOCA evaluation model in EMF-2087(P)(A) is not applicable to the upgrade fuel with M5 clad
- Identified need for evaluation model in EMF-2103, Rev. 3, which was later submitted in September 2013 June 22, 2015 Pre-Submittal teleconference for LARs with LOCA analyses supporting the Fuel Upgrade (ML15198A343)
- LBLOCA LAR submittal planned for September 2015 consistent with expected availability of NRC draft SE for EMF-2103, Rev. 3 by July 2015 June 2015 AREVA incorporated changes from NRC review of
- April 2016 EMF-2103, Rev. 3 into MPS2 analysis and documents
Pg. 5 Schedule for LBLOCA LAR April 14, 2016 Draft SE for EMF-2103(P), Rev. 3 is available to reference to meet NRC LIC-109 May 3, 2016 Pre-submittal teleconference to get NRC feedback on LAR May 31, 2016 MPS2 LBLOCA LAR to be submitted Ongoing Dominion will respond promptly to NRC requests for information to support timely review and will be open to an audit of the technical details of the RLBLOCA analysis Dec. 1, 2016 Requested approval date for LAR (Since July 2013, Dominion has stated that approval by October 2016 would avoid impact on MPS2 Cycle 25 reload documentation)
Spring 2017 MPS2 has committed to introduce the AREVA Standard CE14 HTP fuel with M5 cladding
Scope of the LAR Adds EMF-2103(P)(A) to TS 6.9.1.8.b, Core Operating Limits Report, which lists the analytical methods to determine the core operating limits EMF-2103(P)(A) will be used to establish the COLR limits for the AREVA Standard CE14 HTP fuel product for:
- TS 3.1.3.6 Regulating CEA Insertion Limits
- TS 3.2.1 Linear Heat Rate
- TS 3.2.3 Total Unrodded Integrated Radial Peaking Factor - FT r
LAR includes AREVA Licensing Report (Proprietary and Non-Proprietary versions) with an affidavit for withholding AREVA Licensing Report will be completed after this meeting, so that NRC feedback regarding LAR content can be incorporated Pg. 6
Scope of the LAR MPS2 analysis complies with the NRC draft SE dated April 14, 2016 for EMF-2103(P), Rev. 3
- No deviations from the submitted method as modified by RAI responses LAR will include documentation for how each Limitation from the draft SE has been addressed in the MPS2 application Licensing Report includes content to address recent NRC questions on applications of realistic LBLOCA evaluation models
- Example: Appendix with sampled parameter input values and key results for the case set Pg. 7
Contents of the Licensing Report
- 8 Tables of Inputs and Results 1)
RLBLOCA Analysis - Plant Parameter Values and Ranges 2)
Statistical Distribution Used for Process Parameters 3)
Passive Heat Sinks and Material Properties in Containment Geometry 4)
Compliance with 10 CFR 50.46(b) (see next slide) 5)
Summary of Major Parameters for the Demonstration Case 6)
Calculated Event Times for the Demonstration Case 7)
Heat Transfer Parameters for the Demonstration Case 8)
Fuel Rod Rupture Ranges of Parameters Pg. 8
Contents of the Licensing Report Results Summary GDC-35 requirements will be covered (proprietary content)
Pg. 9
Contents of the Licensing Report
- Scatter Plots
- Operational Parameters (inputs)
- PCT versus Break Size
- Maximum Local Oxidation versus PCT
- Total Core-Wide Oxidation versus PCT Figure - Beginning of Core Recovery Time using MPR CCFL Correlation Pg. 10
Contents of the Licensing Report 12 Plots from Demonstration Case 1)
Peak Clad Temperature (independent of elevation) 2)
Break Flow 3)
Core Inlet Mass Flux 4)
Core Outlet Mass Flux 5)
Void Fraction at RCS Pumps 6)
ECCS Flows (Includes SIT and SI) 7)
Upper Plenum Pressure 8)
Collapsed Liquid Level in the Downcomer 9)
Collapsed Liquid Level in the Lower Plenum
- 10) Collapsed Liquid Level in the Core
- 11) Containment and Loop Pressures
- 12) Pressure Difference between Upper Plenum and Downcomer Pg. 11
Future Dominion/NRC Interactions
- Implementation of the fuel product upgrade at MPS2 for Cycle 25 in Spring 2017 relies on the RLBLOCA LAR
- LAR will be submitted by May 31, 2016 with a reference to the April 14, 2016 draft SE for EMF-2103, Rev. 3
- LAR will request approval by December 1, 2016
- Dominion is open to an NRC audit for efficient sharing of details of the RLBLOCA application not included in the LAR Pg. 12
Acronym List CEA Control Element Assembly CFR Code of Federal Regulations COLR Core Operating Limits Report CWO Core Wide Oxidation ECCS Emergency Core Cooling System HTP High Thermal Performance LAR License Amendment Request LBLOCA Large Break Loss of Coolant Accident LOCA Loss of Coolant Accident MLO Maximum Local Oxidation MPS2 Millstone Power Station, Unit 2 NRC Nuclear Regulatory Commission PCT Peak Cladding Temperature RLBLOCA Realistic Large Break Loss of Coolant Accident SE Safety Evaluation SI Safety Injection SIT Safety Injection Tank TS Technical Specifications UTL Upper Tolerance Limit Pg. 13