ML19056A506

SMR DC RAI - FW: Request for Additional Information No. 365 RAI No. 9309 (3.8.4) Rev 1 (to Remove Prop from Previous Subject Line)

ML19056A506
Person / Time
Site:	NuScale
Issue date:	02/25/2019
From:	NRC
To:	NRC/NRO/DLSE/LB1
References
Download: ML19056A506 (3)

Text

NuScaleDCRaisPEm Resource From: Cranston, Gregory Sent: Monday, February 25, 2019 2:05 PM To: NuScaleDCRaisPEm Resource

Subject:

FW: Request for Additional Information No. 365 RAI No. 9309 (3.8.4) REV 1 (TO REMOVE PROP FROM PREVIOUS SUBJECT LINE)

Attachments: Request for Additional Information No. 365 (eRAI No. 9309).pdf Attached please find NRC staffs request for additional information concerning review of the NuScale Design Certification Application.

Please submit your technically correct and complete response within 60 days of the date of this RAI to the NRC Document Control Desk.

The NRC Staff recognizes that NuScale has preliminarily identified that the response to the question in this RAI will not be provided until August 24, 2018.

If you have any questions, please contact me.

Thank you.

1

Hearing Identifier: NuScale_SMR_DC_RAI_Public Email Number: 564 Mail Envelope Properties (BN8PR09MB3603EBEC0AB7063629E06256907A0)

Subject:

FW: Request for Additional Information No. 365 RAI No. 9309 (3.8.4) REV 1 (TO REMOVE PROP FROM PREVIOUS SUBJECT LINE)

Sent Date: 2/25/2019 2:05:17 PM Received Date: 2/25/2019 2:05:21 PM From: Cranston, Gregory Created By: Gregory.Cranston@nrc.gov Recipients:

"NuScaleDCRaisPEm Resource" <NuScaleDCRaisPEm.Resource@nrc.gov>

Tracking Status: None Post Office: BN8PR09MB3603.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 527 2/25/2019 2:05:21 PM Request for Additional Information No. 365 (eRAI No. 9309).pdf 85531 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

Request for Additional Information No. 365 (eRAI No. 9309)

Issue Date: 02/08/2018 Application

Title:

NuScale Standard Design Certification 048 Operating Company: NuScale Power, LLC Docket No.52-048 Review Section: 03.08.04 - Other Seismic Category I Structures Application Section: 3.8.4 QUESTIONS 03.08.04-37 10 CFR 50, Appendix A, GDC 1, 2, and 4, provide requirements to be met by SSC important to safety. In accordance with these requirements, DSRS Section 3.8.4 provides review guidance pertaining to the design of seismic Category I structures, other than the containment. Consistent with DSRS Section 3.8.4, the staff reviews loads and loading combinations.

In its response to RAI 8971, Question 03.08.04-12, the applicant indicated that the jet impingement, pipe break reaction, and missile impact loads are to be addressed by the COL applicant as per COL items 3.6-2 and COL item 3.6-3. Based on the applicants response, it is not clear to the staff what provisions have been incorporated in the current design to accommodate the aforementioned loads that will be established by the COL applicant and are to be combined with other loads as per Load Combinations 13 and 17 in FSAR Tables 3.8.4-1 and 3.8.4-2, respectively. Therefore, the staff request the applicant to provide the technical basis that demonstrate the adequacy of the RXB to withstand the demands from Load Combinations 13 and 17. Additionally, the staff requests the applicant to clarify the locations in the RXB where these loads are expected to occur and address the comparison of the site-specific loadings (as per load combinations 13 and 17) with the standard design loadings in the existing COL item 3.8-2 or a new COL item. Further, the staff request the applicant to update the FSAR markups proposed in its response to RAI 8971, Question 03.08.04-12, as applicable.