ML18033A146

2018/02/02 Nuscale SMR DC RAI - Request for Additional Information No. 359 RAI No. 9321 (6.4)

ML18033A146
Person / Time
Site:	NuScale
Issue date:	02/02/2018
From:	NRC
To:	NRC/NRO/DNRL/LB1
References
Download: ML18033A146 (3)

Text

1 NuScaleDCRaisPEm Resource From: Cranston, Gregory Sent: Friday, February 02, 2018 10:35 AM To: RAI@nuscalepower.com Cc: NuScaleDCRaisPEm Resource; Lee, Samuel; Chowdhury, Prosanta; Jackson, Diane; Chien, Nan; Tabatabai, Omid

Subject:

Request for Additional Inform ation No. 359 RAI No. 9321 (6.4)

Attachments:

Request for Additional Inform ation No. 359 (eRAI No. 9321).pdf Attached please find NRC staff's 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 one or more questions in this RAI is likely to require greater than 60 days. NuScale is expected to provide a schedule for the RAI response by email within 14 days.

If you have any questions, please contact me.

Thank you.

Gregory Cranston, Senior Project Manager Licensing Branch 1 (NuScale)

Division of New Reactor Licensing Office of New Reactors U.S. Nuclear Regulatory Commission 301-415-0546

Hearing Identifier: NuScale_SMR_DC_RAI_Public Email Number: 390 Mail Envelope Properties (CY4PR09MB128755F1F8F5A7C1908B879E90F90)

Subject:

Request for Additional Information No. 359 RAI No. 9321 (6.4) Sent Date: 2/2/2018 10:34:36 AM Received Date: 2/2/2018 10:34:40 AM From: Cranston, Gregory Created By: Gregory.Cranston@nrc.gov Recipients: "NuScaleDCRaisPEm Resource" <NuScaleDCRaisPEm.Resource@nrc.gov>

Tracking Status: None "Lee, Samuel" <Samuel.Lee@nrc.gov>

Tracking Status: None "Chowdhury, Prosanta" <Prosanta.Chowdhury@nrc.gov> Tracking Status: None "Jackson, Diane" <Diane.Jackson@nrc.gov> Tracking Status: None "Chien, Nan" <Nan.Chien@nrc.gov>

Tracking Status: None "Tabatabai, Omid" <Omid.Tabatabai-Yazdi@nrc.gov> Tracking Status: None "RAI@nuscalepower.com" <RAI@nuscalepower.com> Tracking Status: None

Post Office: CY4PR09MB1287.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 817 2/2/2018 10:34:40 AM Request for Additional Information No. 359 (eRAI No. 9321).pdf 25325

Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: Recipients Received:

Request for Additional Information No. 359 (eRAI No. 9321)

Issue Date: 02/02/2018 Application Title: NuScale Standard Design Certification 048 Operating Company: NuScale Power, LLC Docket No.52-048 Review Section: 06.04 - Control Room Habitability System Application Section: 6.4 QUESTIONS

06.04-3 Reactor operators are important to nuclear safety. To support its finding on the control room and that operators can be safely at the controls under GDCs 1, 3, 4, 5, 19 and 50.54, the staff needs additional information and assurance of known operability and availability of the control room envelope. Further, 10 CFR 50.36 (c)(2)(ii)(A), Criterion 1, requires that a technical specification limiting condition for operation be established for installed instrumentation in the control ro om used to detect significant abnormal degradation of the reactor coolant pressure boundary. For this criterion to be meaningful an operator must be able to be present in the control room during normal and accident conditions to monitor and respond to that condition. While NuScale states that operator action is not needed to mitigate a design-basis accident, operators are expected to be in the control room and a safe environment for workers is expected.

NuScale is requested to provide a TS limiting condition for operation for assurance that the control room envelope is suitable for operator presence, including but not limited to, identifying operability condit ions/criteria of the CRE, expected time to restore operability, any necessary compensatory and follow-on actions, and surveillance requirement(s) for essential components.

If NuScale believes any feature requested above is the responsibility of the license applicant, provide the location that describes, or include in the DCD, the COL Action as a specific item.