ML16022A177

NRR E-mail Capture - South Texas Project Draft Request for Information, Quality Assurance and Design Basis Changes, GSI-191 Resolution

ML16022A177
Person / Time
Site:	South Texas
Issue date:	10/21/2015
From:	Lisa Regner Plant Licensing Branch IV
To:	Harrison W South Texas
References
MF2400, MF2401
Download: ML16022A177 (3)

Text

NRR-PMDAPEm Resource From: Regner, Lisa Sent: Wednesday, October 21, 2015 2:55 PM To: Wayne Harrison Cc: Sterling, Lance (lsterling@STPEGS.COM); Michael Murray; Stang, John; Markley, Michael; Pascarelli, Robert

Subject:

STP GSI-191 DRAFT Questions Attachments: QA-RAI.docx

Wayne, The staff has identified two questions that are significant enough that we need to discuss them with you as soon as possible. The answers could have an impact on our review schedule and scope.

Wed like to have a call to discuss these with you this week, if possible.

Please let me know when you are available.

Thanks, Lisa Lisa Regner Sr. PM NRR/DORL/LPL4-1 301-415-1906 O8D08 1

Hearing Identifier: NRR_PMDA Email Number: 2617 Mail Envelope Properties (e7d8ecdf42c847eaae6af3af636fd8e5)

Subject:

STP GSI-191 DRAFT Questions Sent Date: 10/21/2015 2:55:10 PM Received Date: 10/21/2015 2:55:00 PM From: Regner, Lisa Created By: Lisa.Regner@nrc.gov Recipients:

"Sterling, Lance (lsterling@STPEGS.COM)" <lsterling@STPEGS.COM>

Tracking Status: None "Michael Murray" <mpmurray@STpegs.com>

Tracking Status: None "Stang, John" <>

Tracking Status: None "Markley, Michael" <Michael.Markley@nrc.gov>

Tracking Status: None "Pascarelli, Robert" <Robert.Pascarelli@nrc.gov>

Tracking Status: None "Wayne Harrison" <awharrison@STPEGS.COM>

Tracking Status: None Post Office: HQPWMSMRS05.nrc.gov Files Size Date & Time MESSAGE 416 10/21/2015 2:55:00 PM QA-RAI.docx 26276 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

STP GSI-191 DRAFT Questions Question 1:

It is unclear to the staff which portions of the South Texas Project current licensing bases are being modified per 10 CFR 50.90. Please provide a specific list of all licensing basis changes, in the GSI-191 application (including RAI responses and supplements), for which you are requesting NRC review and approval via 10 CFR 50.90.

Question 2:

Background:

To address GL 2004-02, STP is demonstrating its compliance with 10 CFR 50.46(b)(5), Long term core cooling, including the impact of debris, using the following two step approach:

(1) The hot leg large break, hot leg medium break, hot leg small break, and cold leg small break will be demonstrated to be in compliance with 10 CFR 50.46(b)(5) by ensuring that the long term core temperature does not exceed 800° F assuming a fully blocked core. This is demonstrated by using deterministic analysis performed with RELAP5-3D.

(2) The cold leg large break and cold leg medium break will rely on a risk informed approach.

The hot leg large break, hot leg medium break, hot leg small break, and cold leg small break analysis used to demonstrate compliance with 10 CFR 50.46(b)(5) is accident analysis.

Therefore certain design control measures as specified in 10 CFR 50, Appendix B (III) are required:

Design control measures shall be applied to items such as the following: reactor physics, stress, thermal, hydraulic, and accident analyses; compatibility of materials; accessibility for inservice inspection, maintenance, and repair; and delineation of acceptance criteria for inspections and tests.

However, it is not apparent that the RELAP5-3D analysis was performed under a QA program which satisfies the requirements of Appendix B.

Request:

Demonstrate that the RELAP5-3D analysis was performed under a QA program which satisfies the requirements of 10 CFR 50, Appendix B, or provide a similar analysis which was performed under such a program.

NRR-PMDAPEm Resource From: Regner, Lisa Sent: Wednesday, October 21, 2015 2:55 PM To: Wayne Harrison Cc: Sterling, Lance (lsterling@STPEGS.COM); Michael Murray; Stang, John; Markley, Michael; Pascarelli, Robert

Subject:

STP GSI-191 DRAFT Questions Attachments: QA-RAI.docx

Wayne, The staff has identified two questions that are significant enough that we need to discuss them with you as soon as possible. The answers could have an impact on our review schedule and scope.

Wed like to have a call to discuss these with you this week, if possible.

Please let me know when you are available.

Thanks, Lisa Lisa Regner Sr. PM NRR/DORL/LPL4-1 301-415-1906 O8D08 1

Hearing Identifier: NRR_PMDA Email Number: 2617 Mail Envelope Properties (e7d8ecdf42c847eaae6af3af636fd8e5)

Subject:

STP GSI-191 DRAFT Questions Sent Date: 10/21/2015 2:55:10 PM Received Date: 10/21/2015 2:55:00 PM From: Regner, Lisa Created By: Lisa.Regner@nrc.gov Recipients:

"Sterling, Lance (lsterling@STPEGS.COM)" <lsterling@STPEGS.COM>

Tracking Status: None "Michael Murray" <mpmurray@STpegs.com>

Tracking Status: None "Stang, John" <>

Tracking Status: None "Markley, Michael" <Michael.Markley@nrc.gov>

Tracking Status: None "Pascarelli, Robert" <Robert.Pascarelli@nrc.gov>

Tracking Status: None "Wayne Harrison" <awharrison@STPEGS.COM>

Tracking Status: None Post Office: HQPWMSMRS05.nrc.gov Files Size Date & Time MESSAGE 416 10/21/2015 2:55:00 PM QA-RAI.docx 26276 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

STP GSI-191 DRAFT Questions Question 1:

It is unclear to the staff which portions of the South Texas Project current licensing bases are being modified per 10 CFR 50.90. Please provide a specific list of all licensing basis changes, in the GSI-191 application (including RAI responses and supplements), for which you are requesting NRC review and approval via 10 CFR 50.90.

Question 2:

Background:

To address GL 2004-02, STP is demonstrating its compliance with 10 CFR 50.46(b)(5), Long term core cooling, including the impact of debris, using the following two step approach:

(1) The hot leg large break, hot leg medium break, hot leg small break, and cold leg small break will be demonstrated to be in compliance with 10 CFR 50.46(b)(5) by ensuring that the long term core temperature does not exceed 800° F assuming a fully blocked core. This is demonstrated by using deterministic analysis performed with RELAP5-3D.

(2) The cold leg large break and cold leg medium break will rely on a risk informed approach.

The hot leg large break, hot leg medium break, hot leg small break, and cold leg small break analysis used to demonstrate compliance with 10 CFR 50.46(b)(5) is accident analysis.

Therefore certain design control measures as specified in 10 CFR 50, Appendix B (III) are required:

Design control measures shall be applied to items such as the following: reactor physics, stress, thermal, hydraulic, and accident analyses; compatibility of materials; accessibility for inservice inspection, maintenance, and repair; and delineation of acceptance criteria for inspections and tests.

However, it is not apparent that the RELAP5-3D analysis was performed under a QA program which satisfies the requirements of Appendix B.

Request:

Demonstrate that the RELAP5-3D analysis was performed under a QA program which satisfies the requirements of 10 CFR 50, Appendix B, or provide a similar analysis which was performed under such a program.