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| | number = ML15344A294 | | | number = ML15344A294 |
| | issue date = 12/10/2015 | | | issue date = 12/10/2015 |
| | title = Millstone, Unit 2, 2015/12/10 Presentation Slides for Pre-Submittal Teleconference - Proposed LAR for Charging System in Response to Confirmatory Order EA-13-188 | | | title = /12/10 Presentation Slides for Pre-Submittal Teleconference - Proposed LAR for Charging System in Response to Confirmatory Order EA-13-188 |
| | author name = Craft W D | | | author name = Craft W |
| | author affiliation = Dominion, Dominion Nuclear Connecticut, Inc | | | author affiliation = Dominion, Dominion Nuclear Connecticut, Inc |
| | addressee name = Guzman R V | | | addressee name = Guzman R |
| | addressee affiliation = NRC/NRR/DORL/LPLI-1 | | | addressee affiliation = NRC/NRR/DORL/LPLI-1 |
| | docket = 05000336 | | | docket = 05000336 |
| | license number = DPR-065 | | | license number = DPR-065 |
| | contact person = Guzman R V | | | contact person = Guzman R |
| | case reference number = TAC MF7108 | | | case reference number = TAC MF7108 |
| | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs | | | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs |
| | page count = 10 | | | page count = 10 |
| | project = TAC:MF7108 | | | project = TAC:MF7108 |
| | stage = | | | stage = Meeting |
| }} | | }} |
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| =Text= | | =Text= |
| {{#Wiki_filter: | | {{#Wiki_filter:Pre-Submittal Teleconference Millstone Power Station Unit 2 (MPS2) |
| Pre-Submittal Teleconference Millstone Power Station Unit 2 (MPS2) License Amendment Request (LAR) for Charging System in Response to Confirmatory Order EA-13-188 December 10, 2015 Pg. 2 Agenda *Purpose of LAR *Scope of LAR *AREVA Analysis for Long-Term IOPORV *Application of Single Failure Criterion *Applicable Regulatory Issue *Schedule Pg. 3 Purpose of LAR *LAR required by Confirmatory Order EA-13-188 (8/26/15) Compliance Item #2: "By no later than February 15, 2016, DNC will submit a license amendment request to the NRC addressing the use of charging pumps in the analysis of the inadvertent opening of the PORVs." *DNC has completed an analysis of the long-term response for FSAR Section 14.6.1, "Inadvertent Opening of a Pressurized Water Reactor Pressurizer Pressure Relief Valve" (IOPORV) with no credit for Charging flow *LAR will include proposed changes to Technical Specification (TS) Section 3/4.5.2 and FSAR Chapter 14 *LAR meets regulatory criteria and will preserve health and safety of the public Pg. 4 Scope of LAR *LAR will include more than the analysis of the FSAR Section 14.6.1 IOPORV event required by the Confirmatory Order *LAR will propose to remove Charging from TS 3/4.5.2, Emergency Core Cooling Systems -Charging pumps appear in Surveillance Requirement (SR) 4.5.2.e as an ECCS subsystem with Operability requirements: "By verifying the delivered flow of each charging pump at the required discharge pressure is greater than or equal to the required flow when tested pursuant to Specification 4.0.5." -LAR will demonstrate that Charging does not meet the four criteria in 10CFR50.36 for inclusion in the Technical Specifications -Change to TS 3/4.5.2 Bases will be provided for information Pg. 5 Scope of LAR (Continued) *LAR will request NRC review and approval of changes to FSAR Chapter 14 -Proposed FSAR changes are based on the FSAR prior to the 2009 FSAR change made by DNC under 10 CFR 50.59 -Proposed FSAR change reflects the new long-term IOPORV analysis, which does not credit charging (discussed on next slide) -Proposed change to FSAR Section 14.0.11 clarifies the application of single failure for MPS2 Pg. 6 AREVA Analysis for Long-Term IOPORV *Analysis completed for long-term response to an IOPORV for MPS2 -Uses NRC-approved S-RELAP5 SBLOCA methodology in EMF-2328, Rev. 0, with Supplement 1 -Assumes open pressurizer safety valve which bounds two open PORVs -Credits two HPSI pumps with no flow from charging pumps -Results demonstrate no core uncovery *LAR will include analysis description and plots of key results *With this new analysis, flow from the charging pumps is not credited in any FSAR Chapter 14 safety analyses for event mitigation Application of Single Failure Criterion *IOPORV event in FSAR Section 14.6.1 is a moderate frequency, or ANS Condition II, event *Single failure criterion does not apply to Moderate Frequency events -Consistent with MPS2 FSAR Section 14.0.11 -Consistent with NRC SRP (NUREG-0800) Chapter 15 *Postulating a single failure for the IOPORV event is a Small Break LOCA (FSAR Section 14.6.3) with acceptance criteria governed by 10 CFR 50.46 *MPS2 does not apply a single failure to the IOPORV event (with the exception of the reactor protection system) Pg. 7 Pg. 8 Applicable Regulatory Issue *Draft Revision 1 to RIS 2005-29 "Anticipated Transients That Could Develop Into More Serious Events" -Draft Revision 1 to RIS 2005-29 provides regulatory positions on the IOPORV event that is addressed in the MPS2 LAR. -Demonstration of no long term core uncovery demonstrates that the transient meets the non-escalation criteria Pg. 9 Schedule *DNC will submit the LAR by February 15, 2016 *Review schedule *To maintain compliance with the Confirmatory Order, Operability Determination and Standing Order are in place for the Charging system and will remain in place until NRC makes a final determination on the LAR Acronym List *ANS American Nuclear Society *CFR Code of Federal Regulations *DNC Dominion Nuclear Connecticut *ECCS Emergency Core Cooling System *FSAR Final Safety Analysis Report *IOPORV Inadvertent Opening of a Pressurizer Pressure Relief Valve *LAR License Amendment Request *MPS2 Millstone Power Station, Unit 2 *PWR Pressurized Water Reactor *RIS Regulatory Issue Summary *SBLOCA Small Break Loss of Coolant Accident *SR Surveillance Requirement *SRP Standard Review Plan *TS Technical Specifications Pg. 10 | | License Amendment Request (LAR) for Charging System in Response to Confirmatory Order EA-13-188 December 10, 2015 |
| }} | | |
| | Agenda |
| | * Purpose of LAR |
| | * Scope of LAR |
| | * AREVA Analysis for Long-Term IOPORV |
| | * Application of Single Failure Criterion |
| | * Applicable Regulatory Issue |
| | * Schedule Pg. 2 |
| | |
| | Purpose of LAR |
| | * LAR required by Confirmatory Order EA-13-188 (8/26/15) |
| | Compliance Item #2: |
| | By no later than February 15, 2016, DNC will submit a license amendment request to the NRC addressing the use of charging pumps in the analysis of the inadvertent opening of the PORVs. |
| | * DNC has completed an analysis of the long-term response for FSAR Section 14.6.1, Inadvertent Opening of a Pressurized Water Reactor Pressurizer Pressure Relief Valve (IOPORV) with no credit for Charging flow |
| | * LAR will include proposed changes to Technical Specification (TS) Section 3/4.5.2 and FSAR Chapter 14 |
| | * LAR meets regulatory criteria and will preserve health and safety of the public Pg. 3 |
| | |
| | Scope of LAR |
| | * LAR will include more than the analysis of the FSAR Section 14.6.1 IOPORV event required by the Confirmatory Order |
| | * LAR will propose to remove Charging from TS 3/4.5.2, Emergency Core Cooling Systems |
| | - Charging pumps appear in Surveillance Requirement (SR) 4.5.2.e as an ECCS subsystem with Operability requirements: |
| | By verifying the delivered flow of each charging pump at the required discharge pressure is greater than or equal to the required flow when tested pursuant to Specification 4.0.5. |
| | - LAR will demonstrate that Charging does not meet the four criteria in 10CFR50.36 for inclusion in the Technical Specifications |
| | - Change to TS 3/4.5.2 Bases will be provided for information Pg. 4 |
| | |
| | Scope of LAR (Continued) |
| | * LAR will request NRC review and approval of changes to FSAR Chapter 14 |
| | - Proposed FSAR changes are based on the FSAR prior to the 2009 FSAR change made by DNC under 10 CFR 50.59 |
| | - Proposed FSAR change reflects the new long-term IOPORV analysis, which does not credit charging (discussed on next slide) |
| | - Proposed change to FSAR Section 14.0.11 clarifies the application of single failure for MPS2 Pg. 5 |
| | |
| | AREVA Analysis for Long-Term IOPORV |
| | * Analysis completed for long-term response to an IOPORV for MPS2 |
| | - Uses NRC-approved S-RELAP5 SBLOCA methodology in EMF-2328, Rev. 0, with Supplement 1 |
| | - Assumes open pressurizer safety valve which bounds two open PORVs |
| | - Credits two HPSI pumps with no flow from charging pumps |
| | - Results demonstrate no core uncovery |
| | * LAR will include analysis description and plots of key results |
| | * With this new analysis, flow from the charging pumps is not credited in any FSAR Chapter 14 safety analyses for event mitigation Pg. 6 |
| | |
| | Application of Single Failure Criterion |
| | * IOPORV event in FSAR Section 14.6.1 is a moderate frequency, or ANS Condition II, event |
| | * Single failure criterion does not apply to Moderate Frequency events |
| | - Consistent with MPS2 FSAR Section 14.0.11 |
| | - Consistent with NRC SRP (NUREG-0800) Chapter 15 |
| | * Postulating a single failure for the IOPORV event is a Small Break LOCA (FSAR Section 14.6.3) with acceptance criteria governed by 10 CFR 50.46 |
| | * MPS2 does not apply a single failure to the IOPORV event (with the exception of the reactor protection system) Pg. 7 |
| | |
| | Applicable Regulatory Issue |
| | * Draft Revision 1 to RIS 2005-29 Anticipated Transients That Could Develop Into More Serious Events |
| | - Draft Revision 1 to RIS 2005-29 provides regulatory positions on the IOPORV event that is addressed in the MPS2 LAR. |
| | - Demonstration of no long term core uncovery demonstrates that the transient meets the non-escalation criteria Pg. 8 |
| | |
| | Schedule |
| | * DNC will submit the LAR by February 15, 2016 |
| | * Review schedule |
| | * To maintain compliance with the Confirmatory Order, Operability Determination and Standing Order are in place for the Charging system and will remain in place until NRC makes a final determination on the LAR Pg. 9 |
| | |
| | Acronym List |
| | * ANS American Nuclear Society |
| | * CFR Code of Federal Regulations |
| | * DNC Dominion Nuclear Connecticut |
| | * ECCS Emergency Core Cooling System |
| | * FSAR Final Safety Analysis Report |
| | * IOPORV Inadvertent Opening of a Pressurizer Pressure Relief Valve |
| | * LAR License Amendment Request |
| | * MPS2 Millstone Power Station, Unit 2 |
| | * PWR Pressurized Water Reactor |
| | * RIS Regulatory Issue Summary |
| | * SBLOCA Small Break Loss of Coolant Accident |
| | * SR Surveillance Requirement |
| | * SRP Standard Review Plan |
| | * TS Technical Specifications Pg. 10}} |
Letter Sequence Meeting |
|---|
|
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MONTHYEARML15344A2942015-12-10010 December 2015
/12/10 Presentation Slides for Pre-Submittal Teleconference - Proposed LAR for Charging System in Response to Confirmatory Order EA-13-188
Project stage: Meeting
2015-12-10
[Table View] |
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[Table view] |
Text
Pre-Submittal Teleconference Millstone Power Station Unit 2 (MPS2)
License Amendment Request (LAR) for Charging System in Response to Confirmatory Order EA-13-188 December 10, 2015
Agenda
- AREVA Analysis for Long-Term IOPORV
- Application of Single Failure Criterion
- Applicable Regulatory Issue
Purpose of LAR
Compliance Item #2:
By no later than February 15, 2016, DNC will submit a license amendment request to the NRC addressing the use of charging pumps in the analysis of the inadvertent opening of the PORVs.
- DNC has completed an analysis of the long-term response for FSAR Section 14.6.1, Inadvertent Opening of a Pressurized Water Reactor Pressurizer Pressure Relief Valve (IOPORV) with no credit for Charging flow
- LAR will include proposed changes to Technical Specification (TS) Section 3/4.5.2 and FSAR Chapter 14
- LAR meets regulatory criteria and will preserve health and safety of the public Pg. 3
Scope of LAR
- LAR will include more than the analysis of the FSAR Section 14.6.1 IOPORV event required by the Confirmatory Order
- Charging pumps appear in Surveillance Requirement (SR) 4.5.2.e as an ECCS subsystem with Operability requirements:
By verifying the delivered flow of each charging pump at the required discharge pressure is greater than or equal to the required flow when tested pursuant to Specification 4.0.5.
- LAR will demonstrate that Charging does not meet the four criteria in 10CFR50.36 for inclusion in the Technical Specifications
- Change to TS 3/4.5.2 Bases will be provided for information Pg. 4
Scope of LAR (Continued)
- LAR will request NRC review and approval of changes to FSAR Chapter 14
- Proposed FSAR changes are based on the FSAR prior to the 2009 FSAR change made by DNC under 10 CFR 50.59
- Proposed FSAR change reflects the new long-term IOPORV analysis, which does not credit charging (discussed on next slide)
- Proposed change to FSAR Section 14.0.11 clarifies the application of single failure for MPS2 Pg. 5
AREVA Analysis for Long-Term IOPORV
- Analysis completed for long-term response to an IOPORV for MPS2
- Uses NRC-approved S-RELAP5 SBLOCA methodology in EMF-2328, Rev. 0, with Supplement 1
- Assumes open pressurizer safety valve which bounds two open PORVs
- Credits two HPSI pumps with no flow from charging pumps
- Results demonstrate no core uncovery
- LAR will include analysis description and plots of key results
- With this new analysis, flow from the charging pumps is not credited in any FSAR Chapter 14 safety analyses for event mitigation Pg. 6
Application of Single Failure Criterion
- IOPORV event in FSAR Section 14.6.1 is a moderate frequency, or ANS Condition II, event
- Single failure criterion does not apply to Moderate Frequency events
- Consistent with MPS2 FSAR Section 14.0.11
- Consistent with NRC SRP (NUREG-0800) Chapter 15
- Postulating a single failure for the IOPORV event is a Small Break LOCA (FSAR Section 14.6.3) with acceptance criteria governed by 10 CFR 50.46
Applicable Regulatory Issue
- Draft Revision 1 to RIS 2005-29 provides regulatory positions on the IOPORV event that is addressed in the MPS2 LAR.
- Demonstration of no long term core uncovery demonstrates that the transient meets the non-escalation criteria Pg. 8
Schedule
- DNC will submit the LAR by February 15, 2016
- To maintain compliance with the Confirmatory Order, Operability Determination and Standing Order are in place for the Charging system and will remain in place until NRC makes a final determination on the LAR Pg. 9
Acronym List
- ANS American Nuclear Society
- CFR Code of Federal Regulations
- FSAR Final Safety Analysis Report
- IOPORV Inadvertent Opening of a Pressurizer Pressure Relief Valve
- LAR License Amendment Request
- MPS2 Millstone Power Station, Unit 2
- PWR Pressurized Water Reactor
- RIS Regulatory Issue Summary
- SBLOCA Small Break Loss of Coolant Accident
- SR Surveillance Requirement
- TS Technical Specifications Pg. 10
