ML20034F284
| ML20034F284 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 02/03/2020 |
| From: | Duke Energy Progress |
| To: | Office of Nuclear Reactor Regulation |
| Hon A | |
| References | |
| Download: ML20034F284 (10) | |
Text
Brunswick Implementation of TSTF-564 NRC Conference Call - February 5, 2020
TSTF-564 Overview Currently TS 2.1.1.2 Safety Limit (SL) MCPR ensures that 99.9% of fuel rods are not susceptible to boiling transition Separate limits for two-loop operation (TLO) and single-loop operation (SLO).
Further referred to as the MCPR99.9%
TSTF-564 redefines the SLMCPR as a cycle-independent MCPR value dependent on the 95/95 statistics of the fuel assembly critical power correlation database Further referred to as the MCPR95/95 MCPR99.9%, which is dependent on the cycle-specific power distribution, will be documented in the COLR as required in TS 5.6.5.a.2 and will be used in the determination of operating limit MCPR for LCO 3.2.2 2
TSTF-564 Background TSTF-564 Rev. 0 submitted to the NRC in August 2017 Rev. 1 was submitted in May 2018 along with responses to requests for additional information (RAI)
RAI #1 response expanded the applicability of the methodology to all fuel vendors (e.g.,
Final SE issued November 2018 upon receipt of Rev. 2 of the traveler Approved as part of the consolidated line item improvement process (CLIIP)
CLIIP only available for fuel types identified in TSTF-564 3
BSEP Implementation of TSTF-564 Duke Energy is implementing approved TSTF-564 with Framatome fuel types ATRIUM 10XM and ATRIUM 11 Eliminates the need of cycle-specific SLMCPR LAR on short approval timeline First reloads by unit Unit 2 Cycle 25 - Startup March 2021 Unit 1 Cycle 24 - Startup March 2022 Proposed date for LAR submittal February 2020 Final SE need date - March 2021 to support Unit 2 startup No changes to TS 5.6.5.b CPR correlations or SLMCPR methodology 4
MCPR95/95 Determination TSTF-564 Rev. 2 Section 3.1 i calculated using formulas attributed to Mary Gibbons Natrella (1963) as specified in TSTF-564 5
MCPR95/95 Derivation Proprietary information redacted 6
LAR Content BSEP 1 and 2 Tech Spec Markups (2.1.1.2 and 5.6.5.a.2)
BSEP 1 and 2 Revised Tech Spec Pages BSEP 1 Tech Spec Bases Markup Consistent with Bases markups included in TSTF-564 ATRIUM 11 identified as SL basis ATRIUM 10XM and ATRIUM 11 MCPR95/95 Derivation 7
Summary Proposed date for LAR submittal - February 2020 Final SE need date - March 2021 to support Unit 2 startup MCPR95/95 calculated for Framatomes ATRIUM 10XM and ATRIUM 11 fuel types using approved TSTF-564 methodology Eliminates the need of cycle-specific LAR on short approval timeline 8
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