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| number = ML13197A095
| number = ML13197A095
| issue date = 07/11/2013
| issue date = 07/11/2013
| title = Palo Verde, Units 1, 2, and 3 - 7/11/13 Meeting Slides - Implementation of STAR Program and Replacement of the 2/3 Cycle Mtc Measurement
| title = 7/11/13 Meeting Slides - Implementation of STAR Program and Replacement of the 2/3 Cycle Mtc Measurement
| author name =  
| author name =  
| author affiliation = Arizona Public Service Co
| author affiliation = Arizona Public Service Co
Line 9: Line 9:
| docket = 05000528, 05000529, 05000530
| docket = 05000528, 05000529, 05000530
| license number = NPF-041, NPF-051, NPF-074
| license number = NPF-041, NPF-051, NPF-074
| contact person = Rankin J K
| contact person = Rankin J
| case reference number = TAC MF1932, TAC MF1933, TAC MF1934
| case reference number = TAC MF1932, TAC MF1933, TAC MF1934
| document type = Slides and Viewgraphs
| document type = Slides and Viewgraphs
| page count = 23
| page count = 23
| project = TAC:MF1932, TAC:MF1933, TAC:MF1934
| project = TAC:MF1932, TAC:MF1933, TAC:MF1934
| stage =  
| stage = Meeting
}}
}}


=Text=
=Text=
{{#Wiki_filter:Implementation of STAR Program and Replacement of the 2/3 Cycle MTC Measurement   Pre-Submittal Presentation to the NRC Date: 07/11/2013 Purpose Present and discuss with the NRC planned licensing changes -Implementation of the Startup Testing Activity Reduction (STAR) Program at PVNGS -Replacement of the 2/3 Cycle Moderator Temperature Coefficient (MTC) Measurement 2 Topics STAR Replacement of the 2/3 Cycle MTC Measurement Licensing Approach Conclusion and Discussion 3 STAR Objectives -Alternate method to validate core design -Minimize the time the plant is in an abnormal configuration 4 STAR Overview -Approved by NRC in WCAP-16011-P-A Participating plants only Successfully implemented at 8 CE units -Incorporated into Improved Standard TS NUREG-1432, Rev 4 TSTF 486   5 STAR Overview -Adds Credits Pre-Operational Checks New Beginning of Cycle (BOC) Hot Zero Power (HZP) MTC surveillance methodology Applicability Requirements -Replaces BOC HZP Isothermal Temperature Coefficient (ITC) Measurement CEA Worth Measurement 6 STAR Current Methodology -CEA worth measurement Require operation outside the normal TS LCOs Presents operational challenges -Unit 3 LER 2012-001 -Unit 1 LER 2011-005 -Measure ITC at HZP with use of reactivity computer   7 STAR Proposed Methodology -Replacement of CEA Worth Measurements Use applicability requirements Replacement will reduce the occurrence of problems associated with testing and minimize time in abnormal operating configuration 8 STAR Proposed Methodology (cont.) -Alternate MTC verification Adjust predicted HZP MTC based on measured Critical Boron Increase availability of the control channels Align PVNGS with Improved Standard TS   9 STAR Applicability Requirements -Found in Table 3-4 of WCAP-16011-P-A -Compliance evaluated on a reload cycle-specific basis -STAR only applied to cycles when compliance verified -Maintain the effectiveness of the STAR Program in problem identification     10 STAR Applicability Requirements (cont.) -Core design methods have a defined set of uncertainties based on a benchmark of predictions to actual plant measurements -Core, fuel, CEA design are similar to that of a benchmarked core -Cycle specific predictions independently verified by Comparison of 2 independent neutronics codes   11 STAR Applicability Requirements (cont.) -Implementation of CEA Lifetime Program Limit CEA life within operation experience base -Pre-operational checks verify core and CEA loading are consistent with design -CEA Coupling checks performed during reactor restack Many favorable PVNGS unique design feature   12 STAR Benefits -Minimize the time the plant is in an abnormal operating configuration -Increase the availability of the control channels -Operationally focused improvement 13 STAR WCAP 16011-P-A approach -Compare STAR Program to Generic Program Generic Program based on ANSI/ANS 19.6.1-1997 Identify set of core problems -Design Predictions -As-Built Core -Test Performance 14 STAR WCAP 16011-P-A approach (cont.) -Concluded STAR Program is as effective in detecting the Problems as the Generic Program -STAR is an NRC approved and implemented alternative to current testing methodology. 15 STAR PVNGS Application -Compared Design differences between PVNGS and original participating plants Differences in current PVNGS startup program and Generic Program Operating Experience since original STAR -NRC and INPO -PVNGS -Implementing plants 16 STAR Results of Evaluations -Contained in plant specific justification -CASMO/SIMULATE as applied at PVNGS is acceptable for STAR -The PVNGS STAR Program is as effective as the approved STAR Program and is an acceptable alternative to the current PVNGS startup testing program. 17 Replacement of 2/3 Cycle MTC Measurement Objective -To replace the 2/3 cycle MTC measurement with alternate verification Overview -Approved for all CE plants in CE NPSD-911-A and Amendment 1-A (TSTF 406) -No measurement at 2/3 cycle if 40 EFPD measurement is within acceptance criteria -Already implemented at many PWRs 18 Replacement of 2/3 Cycle MTC Measurement Current Topical only applicable for ROCS & ANC PVNGS will demonstrate applicability of SIMULATE Conclusions -SIMULATE is acceptable for use -Replacement of the 2/3 cycle MTC measurement is acceptable at PVNGS including STAR Cycles 19 Licensing Approach Submit one LAR -Application of STAR to PVNGS -Replacement of 2/3 cycle MTC Measurement 20 Licensing Approach Technical Specification 3.1.4 MTC -SR 3.1.4.1 (HZP verification) Add note allowing use of alternate BOC HZP MTC surveillance method (TSTF 486) -SR 3.1.4.2 (At power verifications) Add note allowing replacement of 2/3 cycle at power MTC Measurement (CE-NPSD-911 & TSTF 406) 21 Licensing Approach Proposed Schedule -Submit November 2013 -Requesting NRC Approval in November 2014 -First use in Spring of 2015 22 Conclusion and Discussion Acceptable to implement the STAR Program at PVNGS Acceptable to replace the 2/3 cycle at power MTC measurement Submit both under a single LAR November 2013 Requesting NRC approval November 2014 23
{{#Wiki_filter:Implementation of STAR Program and Replacement of the 2/3 Cycle MTC Measurement Pre-Submittal Presentation to the NRC Date: 07/11/2013
}}
 
Purpose
* Present and discuss with the NRC planned licensing changes
    - Implementation of the Startup Testing Activity Reduction (STAR) Program at PVNGS
    - Replacement of the 2/3 Cycle Moderator Temperature Coefficient (MTC) Measurement 2
 
Topics
* STAR
* Replacement of the 2/3 Cycle MTC Measurement
* Licensing Approach
* Conclusion and Discussion 3
 
STAR
* Objectives
    - Alternate method to validate core design
    - Minimize the time the plant is in an abnormal configuration 4
 
STAR
* Overview
    - Approved by NRC in WCAP-16011-P-A
* Participating plants only
* Successfully implemented at 8 CE units
    - Incorporated into Improved Standard TS
* NUREG-1432, Rev 4
* TSTF 486 5
 
STAR
* Overview
    - Adds
* Credits Pre-Operational Checks
* New Beginning of Cycle (BOC) Hot Zero Power (HZP) MTC surveillance methodology
* Applicability Requirements
    - Replaces
* BOC HZP Isothermal Temperature Coefficient (ITC) Measurement 6
* CEA Worth Measurement
 
STAR
* Current Methodology
    - CEA worth measurement
* Require operation outside the normal TS LCOs
* Presents operational challenges
          - Unit 3 LER 2012-001
          - Unit 1 LER 2011-005
    - Measure ITC at HZP with use of reactivity computer 7
 
STAR
* Proposed Methodology
    - Replacement of CEA Worth Measurements
* Use applicability requirements
* Replacement will reduce the occurrence of problems associated with testing and minimize time in abnormal operating configuration 8
 
STAR
* Proposed Methodology (cont.)
    - Alternate MTC verification
* Adjust predicted HZP MTC based on measured Critical Boron
* Increase availability of the control channels
* Align PVNGS with Improved Standard TS 9
 
STAR
* Applicability Requirements
    - Found in Table 3-4 of WCAP-16011-P-A
    - Compliance evaluated on a reload cycle-specific basis
    - STAR only applied to cycles when compliance verified
    - Maintain the effectiveness of the STAR Program in problem identification 10
 
STAR
* Applicability Requirements (cont.)
    - Core design methods have a defined set of uncertainties based on a benchmark of predictions to actual plant measurements
    - Core, fuel, CEA design are similar to that of a benchmarked core
    - Cycle specific predictions independently verified by
* Comparison of 2 independent neutronics codes 11
 
STAR
* Applicability Requirements (cont.)
    - Implementation of CEA Lifetime Program
* Limit CEA life within operation experience base
    - Pre-operational checks verify core and CEA loading are consistent with design
    - CEA Coupling checks performed during reactor restack
* Many favorable PVNGS unique design feature 12
 
STAR
* Benefits
    - Minimize the time the plant is in an abnormal operating configuration
    - Increase the availability of the control channels
    - Operationally focused improvement 13
 
STAR
* WCAP 16011-P-A approach
    - Compare STAR Program to Generic Program
* Generic Program based on ANSI/ANS 19.6.1-1997
* Identify set of core problems
            - Design Predictions
            - As-Built Core
            - Test Performance 14
 
STAR
* WCAP 16011-P-A approach (cont.)
    - Concluded STAR Program is as effective in detecting the Problems as the Generic Program
    - STAR is an NRC approved and implemented alternative to current testing methodology.
15
 
STAR
* PVNGS Application
      - Compared
* Design differences between PVNGS and original participating plants
* Differences in current PVNGS startup program and Generic Program
* Operating Experience since original STAR
            - NRC and INPO
            - PVNGS
            - Implementing plants 16
 
STAR
* Results of Evaluations
    - Contained in plant specific justification
    - CASMO/SIMULATE as applied at PVNGS is acceptable for STAR
    - The PVNGS STAR Program is as effective as the approved STAR Program and is an acceptable alternative to the current PVNGS startup testing program.
17
 
Replacement of 2/3 Cycle MTC Measurement
* Objective
    - To replace the 2/3 cycle MTC measurement with alternate verification
* Overview
    - Approved for all CE plants in CE NPSD-911-A and Amendment 1-A (TSTF 406)
    - No measurement at 2/3 cycle if 40 EFPD measurement is within acceptance criteria 18  - Already implemented at many PWRs
 
Replacement of 2/3 Cycle MTC Measurement
* Current Topical only applicable for ROCS
    & ANC
* PVNGS will demonstrate applicability of SIMULATE
* Conclusions
      - SIMULATE is acceptable for use
      - Replacement of the 2/3 cycle MTC measurement is acceptable at PVNGS including 19      STAR Cycles
 
Licensing Approach
* Submit one LAR
      - Application of STAR to PVNGS
      - Replacement of 2/3 cycle MTC Measurement 20
 
Licensing Approach
* Technical Specification 3.1.4 MTC
    - SR 3.1.4.1 (HZP verification)
* Add note allowing use of alternate BOC HZP MTC surveillance method (TSTF 486)
    - SR 3.1.4.2 (At power verifications)
* Add note allowing replacement of 2/3 cycle at power MTC Measurement (CE-NPSD-911 & TSTF 406) 21
 
Licensing Approach
* Proposed Schedule
      - Submit November 2013
      - Requesting NRC Approval in November 2014
      - First use in Spring of 2015 22
 
Conclusion and Discussion
* Acceptable to implement the STAR Program at PVNGS
* Acceptable to replace the 2/3 cycle at power MTC measurement
* Submit both under a single LAR November 2013
* Requesting NRC approval November 2014 23}}

Latest revision as of 15:58, 4 November 2019

7/11/13 Meeting Slides - Implementation of STAR Program and Replacement of the 2/3 Cycle Mtc Measurement
ML13197A095
Person / Time
Site: Palo Verde  Arizona Public Service icon.png
Issue date: 07/11/2013
From:
Arizona Public Service Co
To:
Division of Operating Reactor Licensing
Rankin J
References
TAC MF1932, TAC MF1933, TAC MF1934
Download: ML13197A095 (23)
v • d • e


Text

Implementation of STAR Program and Replacement of the 2/3 Cycle MTC Measurement Pre-Submittal Presentation to the NRC Date: 07/11/2013

Purpose

  • Present and discuss with the NRC planned licensing changes

- Implementation of the Startup Testing Activity Reduction (STAR) Program at PVNGS

- Replacement of the 2/3 Cycle Moderator Temperature Coefficient (MTC) Measurement 2

Topics

  • Replacement of the 2/3 Cycle MTC Measurement
  • Licensing Approach
  • Conclusion and Discussion 3

STAR

  • Objectives

- Alternate method to validate core design

- Minimize the time the plant is in an abnormal configuration 4

STAR

  • Overview

- Approved by NRC in WCAP-16011-P-A

  • Participating plants only
  • Successfully implemented at 8 CE units

- Incorporated into Improved Standard TS

STAR

  • Overview

- Adds

  • Credits Pre-Operational Checks
  • New Beginning of Cycle (BOC) Hot Zero Power (HZP) MTC surveillance methodology
  • Applicability Requirements

- Replaces

  • BOC HZP Isothermal Temperature Coefficient (ITC) Measurement 6
  • CEA Worth Measurement

STAR

  • Current Methodology

- CEA worth measurement

  • Require operation outside the normal TS LCOs
  • Presents operational challenges

- Unit 3 LER 2012-001

- Unit 1 LER 2011-005

- Measure ITC at HZP with use of reactivity computer 7

STAR

  • Proposed Methodology

- Replacement of CEA Worth Measurements

  • Use applicability requirements
  • Replacement will reduce the occurrence of problems associated with testing and minimize time in abnormal operating configuration 8

STAR

  • Proposed Methodology (cont.)

- Alternate MTC verification

  • Adjust predicted HZP MTC based on measured Critical Boron
  • Increase availability of the control channels
  • Align PVNGS with Improved Standard TS 9

STAR

  • Applicability Requirements

- Found in Table 3-4 of WCAP-16011-P-A

- Compliance evaluated on a reload cycle-specific basis

- STAR only applied to cycles when compliance verified

- Maintain the effectiveness of the STAR Program in problem identification 10

STAR

  • Applicability Requirements (cont.)

- Core design methods have a defined set of uncertainties based on a benchmark of predictions to actual plant measurements

- Core, fuel, CEA design are similar to that of a benchmarked core

- Cycle specific predictions independently verified by

  • Comparison of 2 independent neutronics codes 11

STAR

  • Applicability Requirements (cont.)

- Implementation of CEA Lifetime Program

  • Limit CEA life within operation experience base

- Pre-operational checks verify core and CEA loading are consistent with design

- CEA Coupling checks performed during reactor restack

  • Many favorable PVNGS unique design feature 12

STAR

  • Benefits

- Minimize the time the plant is in an abnormal operating configuration

- Increase the availability of the control channels

- Operationally focused improvement 13

STAR

  • WCAP 16011-P-A approach

- Compare STAR Program to Generic Program

  • Identify set of core problems

- Design Predictions

- As-Built Core

- Test Performance 14

STAR

  • WCAP 16011-P-A approach (cont.)

- Concluded STAR Program is as effective in detecting the Problems as the Generic Program

- STAR is an NRC approved and implemented alternative to current testing methodology.

15

STAR

- Compared

  • Design differences between PVNGS and original participating plants
  • Differences in current PVNGS startup program and Generic Program
  • Operating Experience since original STAR

- NRC and INPO

- PVNGS

- Implementing plants 16

STAR

  • Results of Evaluations

- Contained in plant specific justification

- CASMO/SIMULATE as applied at PVNGS is acceptable for STAR

- The PVNGS STAR Program is as effective as the approved STAR Program and is an acceptable alternative to the current PVNGS startup testing program.

17

Replacement of 2/3 Cycle MTC Measurement

  • Objective

- To replace the 2/3 cycle MTC measurement with alternate verification

  • Overview

- Approved for all CE plants in CE NPSD-911-A and Amendment 1-A (TSTF 406)

- No measurement at 2/3 cycle if 40 EFPD measurement is within acceptance criteria 18 - Already implemented at many PWRs

Replacement of 2/3 Cycle MTC Measurement

  • Current Topical only applicable for ROCS

& ANC

  • PVNGS will demonstrate applicability of SIMULATE
  • Conclusions

- SIMULATE is acceptable for use

- Replacement of the 2/3 cycle MTC measurement is acceptable at PVNGS including 19 STAR Cycles

Licensing Approach

- Application of STAR to PVNGS

- Replacement of 2/3 cycle MTC Measurement 20

Licensing Approach

- SR 3.1.4.1 (HZP verification)

  • Add note allowing use of alternate BOC HZP MTC surveillance method (TSTF 486)

- SR 3.1.4.2 (At power verifications)

  • Add note allowing replacement of 2/3 cycle at power MTC Measurement (CE-NPSD-911 & TSTF 406) 21

Licensing Approach

  • Proposed Schedule

- Submit November 2013

- Requesting NRC Approval in November 2014

- First use in Spring of 2015 22

Conclusion and Discussion

  • Acceptable to implement the STAR Program at PVNGS
  • Acceptable to replace the 2/3 cycle at power MTC measurement
  • Submit both under a single LAR November 2013
  • Requesting NRC approval November 2014 23
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