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| | number = ML17283A084 | | | number = ML17283A084 |
| | issue date = 10/04/2017 | | | issue date = 10/04/2017 |
| | title = (External_Sender) Seabrook Flooding MSA & FE Question | | | title = NRR E-mail Capture - (External_Sender) Seabrook Flooding MSA & FE Question |
| | author name = Thomas C | | | author name = Thomas C |
| | author affiliation = NextEra Energy Seabrook, LLC | | | author affiliation = NextEra Energy Seabrook, LLC |
Latest revision as of 04:15, 4 December 2019
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Category:E-Mail
MONTHYEARML23173A1522023-06-22022 June 2023 Request for Additional Information NextEra Fleet Emergency Plan Amendment Request ML23156A3042023-05-31031 May 2023 Acceptance of Requested Licensing Action Amendment Request to Remove Period of Applicability from Pressure Temperature Limits and Low Temperature Over Pressure Protection Curves ML23109A1862023-04-19019 April 2023 and Turkey Point Acceptance of Requested Licensing Action Proposed Alternative to Asme Section XI Authorizing Implementation of Asme Code Case N-752-1 ML23066A1892023-03-0303 March 2023 OEDO-22-00419: Email Dated 3-3-2023 to Petitioner on Seabrook ASR Petition ML23066A0892023-02-24024 February 2023 OEDO-22-00419 - Email Dated 02/24/2023 to Petitioner on Seabrook Unit 1 ASR Petition ML23020A9392023-01-19019 January 2023 Acceptance of Requested Licensing Action Amendment Request to Revise Cooling Tower Service Water Loop or Cell Requirements (EPID L-2022-LLA-0183) (Email) ML23011A3082023-01-11011 January 2023 Request for Additional Information Regarding Relief Request 4RA-22-001 (L-2022-LLR-0074) ML22341A0012022-12-0606 December 2022 Acceptance of Requested Licensing Action Relief Request 4RA-22-001, Proposed Alternative in Accordance with 10 CFR 50.55a(z)(2) ML22333A7452022-11-22022 November 2022 OEDO-22-00419 - Email: C-10 Response on PRB Initial Assessment - C-10 Petition on Seabrook ASR Concrete Degradation ML22287A1472022-10-13013 October 2022 2.026 Petition Screen-in Email ML22228A0552022-08-15015 August 2022 Request for Additional Information Steam Generator Tube Inspection Report Review ML22200A1082022-07-19019 July 2022 Acceptance Review for TSTF-577 Amendment ML22153A4152022-05-31031 May 2022 Request for Additional Information Re 120V Inverter LAR from TS Branch - Final ML22116A2442022-04-26026 April 2022 Acceptance of Requested Licensing Action Relief Request 3IR-18 and 3IR-19 for End of Third 10-Year ISI Interval for Examinations with Limited Coverage ML22048B5522022-02-17017 February 2022 LTR-22-0010 Reply to Geoff Gilbert Email Concern About Seabrook Station Concrete Degradation ML22062B6642022-02-0707 February 2022 Request for Additional Information 120V Inverter LAR from the Electrical Branch ML22063A0002022-01-25025 January 2022 Requests for Additional Information from Risk Branch Regarding 120V Inverter LAR ML22020A2542022-01-20020 January 2022 LTR-22-0010 Geoff Gilbert, E-mail Concern About Seabrook Station Concrete Degradation ML21097A2512021-04-0707 April 2021 Request for Additional Information Regarding Steam Generator Tube Inspection Report Review for RFO 20 (EPID L-2020-LRO-0066) (Email) ML21054A0482021-02-23023 February 2021 Request for Additional Information Regarding Heat Flux Hot Channel Requirement Amendment Request ML20343A0942020-12-0303 December 2020 Request for Additional Information Regarding Seabrook (COVID-19) Part 73 Force-on-Force Exemption Request (L-2020-LLE-0219) ML20273A2812020-09-22022 September 2020 Acceptance of Requested Licensing Action License Amendment Request to Resolve Non-Conservative Heat Flux Hot Channel Factor Requiments ML20258A1502020-09-14014 September 2020 Request for Additional Information Related to Seabrook License Amendment Request Regarding One-Time Change to the AC Sources Operating TS ML20260H4932020-09-11011 September 2020 NRR E-mail Capture - Comanche Peak - Acceptance of Requested Licensing Action - Request to Use Later Code Edition of ASME OM Code ML20230A2962020-08-14014 August 2020 Acceptance of Requested Licensing Action License Amendment Request to Allow a One-Time Change to the AC Sources Operating TS ML20167A1842020-06-11011 June 2020 Request for Additional Information Related to Seabrook License Amendment Request Regarding TSTF-411 and TSTF-418 (L-2019-LLA-0237) ML20124A0012020-05-0101 May 2020 Cancellation of Call with Seabrook on Steam Generator Tube Inspections ML20114E1592020-04-23023 April 2020 Email and Request for Additional Information Related to Seabrook License Amendment Request to Degraded Voltage Time Delay Setpoint (L-2020-LLA-0012) ML20101N0932020-04-10010 April 2020 Acceptance of Requested Licensing Action Re Relief Request to Defer ASME Inspections Due COVID-19 (EPIDs L-2020-LLR-0055, -56, and -57) ML20101L0402020-04-10010 April 2020 Acceptance of Requested Licensing Action Relief Request to Use Code Case OMN-13 with 2012 Edition of the OM Code ML20101H3912020-04-0808 April 2020 Verbal Authorization for Seabrook Relief Request 3IIR-7 ML20087K8262020-03-27027 March 2020 Upcoming Steam Generator Tube Inservice Inspection ML20063J9792020-02-28028 February 2020 Acceptance of Requested Licensing Action Amendment Request to Revise Degraded Voltage Time Delay Setpoint ML19347C6732019-12-13013 December 2019 Acceptance of Requested Licensing Action Amendment Request to Adopt TSTF-418 ML19296D9122019-10-23023 October 2019 NRR E-mail Capture - Request for Additional Information Related to Seabrook Inverter Amendment (L-2019-LLA-0216) ML19295F5422019-10-15015 October 2019 NRR E-mail Capture - Seabrook Station, Unit No. 1 - Acceptance of Requested Licensing Action Amendment Request to Revise Onsite Power Distribution Requirements ML19275G7832019-10-0101 October 2019 Limited Appearance Statement from New Hampshire State Representative, Robert Harb Regarding the Seabrook Station Unit 1 License Amendment Application ML19270E6512019-09-27027 September 2019 Limited Appearance Statement from Joanna Hammond Regarding the Seabrook Station Unit 1 License Amendment Application ML19270E6542019-09-26026 September 2019 Limited Appearance Statement from Brian Campbell Regarding the Seabrook Station Unit 1 License Amendment Application ML19196A3592019-07-15015 July 2019 NRR E-mail Capture - Seabrook Station, Unit No. 1 - Acceptance of Requested Licensing Action Amendment Request to Revise the Emergency Core Cooling System Accumulator Technical Specifications ML19169A2412019-06-13013 June 2019 NRR E-mail Capture - Seabrook Station, Unit No. 1 - Acceptance of Requested Licensing Action Relief Requests for the Containment Building Spray Pump Flow and Vibration Testing (Epids L-2019-LLR-00 and L-2019-LLR-00) ML19162A0662019-06-0404 June 2019 Reply to Mr. Rick Jakious'S E-mail of 5-29-2019 to Stephen B. Comley Sr., We the People with Attachments ML19112A1782019-04-22022 April 2019 NRR E-mail Capture - Point Beach; Seabrook; Turkey Point - Acceptance of Requested Licensing Action Amendment Request to Revise Technical Specifications to Adopt TSTF-563 ML19101A4042019-04-11011 April 2019 NRR E-mail Capture - Point Beach; Seabrook; St. Lucie; Turkey Point - Acceptance of Licensing Action Relief Request to Use Encoded Phased Array Ultrasonic Examination Techniques for Ferritic and Austenitic Welds ML19070A2382019-03-10010 March 2019 LTR-19-0088 Maura Healey, Attorney General, the Commonwealth of Massachusetts, Ltr NextEras Requests for a License Amendment and Twenty-year Extension Prior to Issuance of a Final Decision in Adjudicatory Hearing on Concrete Degradation at ML19056A4522019-02-25025 February 2019 Comment from Philip Hurzeler Regarding the Emergency Petition Filed by C-10 on February 13, 2019 ML19056A4582019-02-25025 February 2019 Comment from Deborah A. Jones Regarding the Emergency Petition Filed by C-10 on February 13, 2019 ML19056A4602019-02-25025 February 2019 Comment from Lisa Conti Regarding the Emergency Petition Filed by C-10 on February 13, 2019 ML19050A2212019-02-19019 February 2019 NRR E-mail Capture - Seabrook Station, Unit No. 1 - Acceptance of Requested Licensing Action Relief Request Proposed Alternative 3IR-17 Implementation of an Extended Reactor Vessel Inservice Inspection Interval ML19050A3202019-02-13013 February 2019 Package from Stephen B. Comley, Sr. at February 13, 2019 Seabrook Station, Unit 1, Public Meeting 2023-06-22
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NRR-PMDAPEm Resource From: Thomas, Christine <Christine.Thomas@nexteraenergy.com>
Sent: Wednesday, October 04, 2017 3:57 PM To: Vega, Frankie Cc: Axelson, Karl; Browne, Kenneth
Subject:
[External_Sender] Seabrook Flooding MSA & FE Question Good afternoon Frankie, As requested, here is a summary of our phone conversation from this afternoon:
Seabrook recently submitted the Flooding Hazard Reevaluation Report (FHRR) to evaluate the impact of a beyond design basis external events (BDBEE) on-site. The FHRR has been accepted by the NRC as the basis to determine the effects of a BDBEE on Seabrook Station.
Detailed topographic data was used in the FHRR supporting calculations to develop site-specific flooding models. The FHRR was then used as design input into the Mitigating Strategies Assessment (MSA) and Focused Evaluation (FE) to determine the impact of BDBEE flooding on the FLEX Program and critical plant SSCs. The NRC is currently reviewing the MSA and FE to verify that Seabrook Station will be adequately protected against these flooding hazards.
The site-specific flooding models developed for the FHRR use detailed survey data. NextEra Energy Seabrook is looking to pave some areas inside the protected area which would alter the elevations due to the high level of detail in the survey data and the inaccurate nature of the hot-topping process. NEE has run a paving sensitivity case to capture the worst case scenario effects of the proposed paving project. The paving sensitivity case added two inches to the existing elevations at the proposed paving locations, and recalculated flood depths on-site. The results of this model run were then plugged into the MSA and FE Engineering Evaluations. The conclusion was that an additional 2,089 gallons of flood water would enter the Unit 2 Tunnel and Waste Process Building reducing flooding margin by 10%. The intent is to remove the existing paving and repave to approximately the same contour, but the "paving sensitivity case would bound any elevation changes and provide margin for error.
As discussed, 50.54F responses are a snap-shot in time. We understand that the documents like the MSA are part of our licensing basis and need to be maintained as such. The specific question for you is, considering that the MSA and FE are currently under review by the NRC, do you require any notification or discussion of the changes to the model?
Ill be out of the office starting Friday through Monday, October 16th. Please feel free to contact the Project Manager, Karl Axelson (603-773-7745) or the Licensing Manager, Ken Browne (603-773-7932) in my absence, especially if you feel a phone call is warranted.
Thank you, Christine 1
Hearing Identifier: NRR_PMDA Email Number: 3762 Mail Envelope Properties (5539b7ad182a47b69fff2ea7c4150400)
Subject:
[External_Sender] Seabrook Flooding MSA & FE Question Sent Date: 10/4/2017 3:56:48 PM Received Date: 10/4/2017 3:56:56 PM From: Thomas, Christine Created By: Christine.Thomas@nexteraenergy.com Recipients:
"Axelson, Karl" <Karl.Axelson@nexteraenergy.com>
Tracking Status: None "Browne, Kenneth" <Kenneth.J.Browne@nexteraenergy.com>
Tracking Status: None "Vega, Frankie" <Frankie.Vega@nrc.gov>
Tracking Status: None Post Office: nexteraenergy.com Files Size Date & Time MESSAGE 2467 10/4/2017 3:56:56 PM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received: