ML20260J593

COL Docs - Presentation Material for 9/17/20 Public Meeting with SNC

ML20260J593
Person / Time
Site:	Vogtle
Issue date:	09/16/2020
From:	Office of Nuclear Reactor Regulation
To:	NRC/NRR/DNRL
References
Download: ML20260J593 (7)

Text

From: Schiller, Alina Sent: Wednesday, September 16, 2020 4:23 PM To: Vogtle PEmails Cc: Welch, Christopher; Gaslevic, James; Santos, Cayetano

Subject:

Presentation Material for 9/17/20 Public Meeting with SNC Attachments: ITAAC 138 Presentation for September 17 2020.pdf From: Leighty, Steven <sleighty@southernco.COM>

Sent: Wednesday, September 16, 2020 4:12 PM To: Schiller, Alina <Alina.Schiller@nrc.gov>

Cc: Arafeh, Yasmeen N. <YNARAFEH@southernco.com>; Petrak, Tom G. <TGPETRAK@southernco.com>;

Kellenberger, Nicholas <X2NRKELL@SOUTHERNCO.COM>

Subject:

[External_Sender] Presentation Material for Public Meeting Tomorrow

Alina, Please find attached presentation material in support of the 2nd topic on the agenda for tomorrows public meeting. Please let me know if you have any questions.

Thanks, Steve Leighty l Southern Nuclear Licensing Supervisor l Vogtle 3&4 706.848.6790 l sleighty@southernco.com

Hearing Identifier: Vogtle_COL_Docs_Public Email Number: 589 Mail Envelope Properties (BLAPR09MB6594528C7DB4AC6EB9C3A75996210)

Subject:

Presentation Material for 9/17/20 Public Meeting with SNC Sent Date: 9/16/2020 4:23:26 PM Received Date: 9/16/2020 4:23:28 PM From: Schiller, Alina Created By: Alina.Schiller@nrc.gov Recipients:

"Welch, Christopher" <Christopher.Welch@nrc.gov>

Tracking Status: None "Gaslevic, James" <James.Gaslevic@nrc.gov>

Tracking Status: None "Santos, Cayetano" <Cayetano.Santos@nrc.gov>

Tracking Status: None "Vogtle PEmails" <Vogtle.PEmails@nrc.gov>

Tracking Status: None Post Office: BLAPR09MB6594.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 718 9/16/2020 4:23:28 PM ITAAC 138 Presentation for September 17 2020.pdf 875162 Options Priority: Normal Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

VEGP 3&4 Passive Containment Cooling (PCS) test for ITAAC 138 September 17, 2020

Review of ITAAC 138 Requirements Purple: Added by LAR-17-043

Acceptance Criteria i)

• Perform test as described in the UIN (reference ML19266A596)

• An additional step will be added to measure the water coverage on the top of the containment vessel.

• Method to measure coverage to be determined.

• If AC flowrates are met, no further action is required

• If AC flowrates are not met, AC will be met by an updated calculation of containment pressure and temperature using the measured flowrates and vessel coverage.

Calculation will demonstrate that measured flow rate and coverage provides sufficient heat removal capability such that the limiting containment pressure and temperature values are not affected

Acceptance Criteria ii)

• Perform test as described in the UIN (reference ML19266A596)

• If 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> AC flowrate is met, no further action is required

• If 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> AC flowrate is not met, AC will be met by a calculation of containment pressure and temperature using the measured flowrate.

Calculation will demonstrate that the measured flow rate provides sufficient heat removal capability such that the limiting containment pressure and temperature values are not affected

ITAAC 138 UIN These values confirm that the ITAAC acceptance criteria are satisfied or if any flow values do not meet the ITAAC acceptance criteria values, an analysis is performed and a report exists and concludes that the as-measured flow rates delivered by the PCCWST to the containment vessel provides sufficient heat removal capability such that the limiting containment pressure and temperature values are not affected and the PCS is able to perform its safety function to remove heat from containment to maintain plant safety.