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{{#Wiki_filter: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}}
{{#Wiki_filter:Pre-Submittal Teleconference Millstone Power Station Unit 2  (MPS2)
License Amendment Request (LAR) for Charging System in Response to Confirmatory Order EA 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 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}}

Revision as of 17:13, 30 June 2018

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
ML15344A294
Person / Time
Site: Millstone Dominion icon.png
Issue date: 12/10/2015
From: Craft W D
Dominion, Dominion Nuclear Connecticut
To: Guzman R V
Plant Licensing Branch 1
Guzman R V
References
TAC MF7108
Download: ML15344A294 (10)
v • d • e


Text

Pre-Submittal Teleconference Millstone Power Station Unit 2 (MPS2)

License Amendment Request (LAR) for Charging System in Response to Confirmatory Order EA 188 December 10, 2015

Pg. 2 Agenda *Purpose 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 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

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
  • 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
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