ML21025A175: Difference between revisions

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{{#Wiki_filter:Susquehanna Steam Electric Station License Amendment Request to Adopt TSTF-505 Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b Pre-Application Meeting January 26, 2021
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Meeting Purpose
* Describe a future license amendment request
          - Scope of Request
          - Variations from TSTF-505
          - PRA Models and CRMP Summary
* Schedule
© Talen Energy                  2
 
Scope of Amendment
* TSTF-505, Revision 2
* RICTs apply to 22 SSES LCOs
* Applicable in Modes 1 and 2
* No Loss of Function Actions
© Talen Energy        3
 
Variations
* SSES plant-specific RAs not in TSTF-505
* Propose to include TS 3.3.2.1 in RICT Program
* TSTF-505 Conditions/RAs not applicable to SSES
* Administrative Changes
* Cross-reference list for TSTF-505 markups to SSES site-specific TS RAs provided
© Talen Energy              4
 
TS 3.3.2.1 - Control Rod Block Inst.
* Propose to include Condition A in scope CONDITION                          REQUIRED ACTION                    COMPLETION TIME A. One rod block monitor (RBM) channel A.1 Restore RBM channel to OPERABLE status. 24 hours inoperable.
          - Generically excluded per criterion 11
          - Conservative surrogate identified
© Talen Energy                                        5
 
PRA Technical Adequacy
* Internal Events, Fire, and Flooding Models
          - RG 1.200, Revision 2 Peer Review
          - Appendix X F&O Closure Review
          - 13 F&O Findings remain open
* Internal Events - 1
* Fire - 12
* Internal Flooding - 0
© Talen Energy                        6
 
PRA Technical Adequacy (cont.)
* Seismic
          - No Seismic PRA Model
          - Seismic penalty will be applied to all RICTs
* Additional LERF penalties will be applied when containment is de-inerted
* Other external hazards
          - All other external hazards screen out
© Talen Energy                          7
 
Real-Time Risk Model
* Similar to Maintenance Rule (a)(4) CRMP
          - Incorporates RICT/RMAT calculation features
          - Incorporates seismic penalty factor
© Talen Energy                    8
 
Schedule
* Submit by end of March 2021
* Requested issuance in April 2022
* Requested implementation period of 180 days and no earlier than August 31, 2022
© Talen Energy              9
 
List of Acronyms CRMP          Configuration Risk Management Program F&O            Fact and Observation LCO            Limiting Condition for Operation LERF          Large Early Release Frequency PRA            Probabilistic Risk Assessment RA            Required Action RG            Regulatory Guide RICT          Risk Informed Completion Time RITSTF        Risk-Informed Technical Specifications Task Force RMAT          Risk Management Action Time SSES          Susquehanna Steam Electric Station TS            Technical Specifications TSTF          Technical Specifications Task Force
© Talen Energy                      10}}

Revision as of 08:56, 18 January 2022

License Amendment Request to Adopt TSTF-505 - Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b Pre-Application Meeting, January 26, 2021 (Slides)
ML21025A175
Person / Time
Site: Susquehanna  Talen Energy icon.png
Issue date: 01/26/2021
From:
Talen Energy Susquehanna Steam Electric Station
To: Sujata Goetz
NRC/NRR/DORL/LPL1
Goetz S
References
Download: ML21025A175 (10)
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