ML18232A173

COL Docs - Vogtle LAR-17-043 Draft RAI No2

ML18232A173
Person / Time
Site:	Vogtle
Issue date:	08/20/2018
From:	NRC
To:	NRC/NRO/DLSE/LB4
References
Download: ML18232A173 (3)

Text

Vogtle PEmails From: Gleaves, Bill Sent: Monday, August 20, 2018 10:26 AM To: Chamberlain, Amy Christine; Eddie Grant - SoCo Contractor (x2edgran@southernco.com)

Cc: Dixon-Herrity, Jennifer; Ray, Sheila; Martinez Navedo, Tania; Jackson, Diane; Travis, Boyce; Vogtle PEmails

Subject:

Vogtle LAR-17-043 Draft RAI No2 Attachments: Vogtle LAR-17-043 Draft RAI No2 Q1 EEB.pdf

Amy, By this email, the draft RAI No.2 for LAR-170-043 is being entered into public ADAMS.

The next step is for SNC to identify if it has questions or comments or, if not, to accept the draft RAI as final by informing me of the acceptance.

Once SNC accepts this draft RAI as final we typically expect that the RAI response will be 1 month after the draft RAI is accepted by SNC as final. In addition, the staff will not be able to complete the review approximately 1 month after receipt of an acceptable response or supplement. If the change is needed sooner than that date to support construction, please consider submitting a request for a PAR.

If there is SUNSI information in this draft RAI, please let me know ASAP so that I may stop it before it is publically released (there is a delay of about 5 days). If there is SUNSI information in the RAI response, please so state in the response letter and mark appropriately.

Respectfully, Billy William (Billy) Gleaves Senior Project Manager Licensing Branch 4 OWFN 8H17 US NRC The contents of this message may be sensitive. If this message has been received in error, please delete it without reading it. Your receipt of this message is not intended to waive any applicable privilege. Do not disseminate this message without the permission of the author. Communications by this author are not binding on The Commission.

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Hearing Identifier: Vogtle_COL_Docs_Public Email Number: 344 Mail Envelope Properties (BN7PR09MB2916F612D81E58831B56F5D89F320)

Subject:

Vogtle LAR-17-043 Draft RAI No2 Sent Date: 8/20/2018 10:26:10 AM Received Date: 8/20/2018 10:26:15 AM From: Gleaves, Bill Created By: Bill.Gleaves@nrc.gov Recipients:

"Dixon-Herrity, Jennifer" <Jennifer.Dixon-Herrity@nrc.gov>

Tracking Status: None "Ray, Sheila" <Sheila.Ray@nrc.gov>

Tracking Status: None "Martinez Navedo, Tania" <Tania.MartinezNavedo@nrc.gov>

Tracking Status: None "Jackson, Diane" <Diane.Jackson@nrc.gov>

Tracking Status: None "Travis, Boyce" <Boyce.Travis@nrc.gov>

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

Tracking Status: None "Chamberlain, Amy Christine" <ACCHAMBE@southernco.com>

Tracking Status: None "Eddie Grant - SoCo Contractor (x2edgran@southernco.com)" <x2edgran@southernco.com>

Tracking Status: None Post Office: BN7PR09MB2916.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 1472 8/20/2018 10:26:15 AM Vogtle LAR-17-043 Draft RAI No2 Q1 EEB.pdf 87334 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

DRAFT Request for Additional Information 2 Issue Date: August 20, 2018 Application

Title:

VEGP Units 3 and 4 - LARs Operating Company: Southern Nuclear Operating Co.

Docket No.52-025 and 52-026 Review Section: 03.11 - Environmental Qualification of Mechanical and Electrical Equipment Application Section: LAR-17-043 EENB RAI QUESTION 1 10 CFR 50.49(e) states that the electric equipment qualification program must include and be based on temperature, pressure, humidity, chemical effects, radiation, aging, submergence, synergistic effects and margins.

VEGP 3&4 UFSAR Section 3.D.4.3, "Mild Versus Harsh Environments," states that the AP1000 equipment qualification program conforms to the requirements of 10 CFR 50.49 for the qualification of harsh environment equipment. Furthermore, UFSAR Section 3.11.1.2, "Environmental Conditions," states that in the event of potential flooding/wetting, one of the following criteria is applied for protection of equipment for service in such an environment: 1) equipment will be qualified for submergence due to flooding/wetting, 2) equipment will be protected from wetting due to spray and 3) equipment will be evaluated to show that failure of the equipment due to flooding/wetting is acceptable since its safety-related function is not required or has otherwise been accomplished.

Staff reviewed LAR-17-043, APP-SSAR-GSC-157, Revision 1, "AP1000 Long-Term LOCA Containment Integrity Analysis with WGOTHIC," APP-SSAR-GSC-166, Revision 1, "AP1000 Steamline Break Containment Integrity Analysis," and APP-GW-VPR-008, Revision 0, "Evaluation of Environmental Conditions Envelope Exceedances."

The applicant in LAR-17-043, stated that mass and energy (M&E) releases for Loss of Coolant Accident (LOCA) and Main Steam Line Break (MSLB) events are also recalculated.

Furthermore, the applicant stated in LAR 17-043, Section 3.1.4, "Updates to Containment Integrity (Containment Peak Pressure) Analyses," that the updated containment pressure and temperature does not result in a change to the limiting profiles assumed in the equipment qualification testing program. In addition, the applicant stated in the LAR that there are no radiation zone changes or radiological access control changes required due to the proposed changes.

Staff finds that the applicant has addressed the aspects of equipment qualification related to containment pressure and temperature as well as radiation but did not address equipment subject to submergence. Please discuss how the proposed changes affect equipment subject to submergence or please confirm that submerged equipment remains qualified as a result of the proposed changes. Please add a discussion in the LAR regarding the qualification of submerged equipment, as applicable.

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