ML17333A077

Infogram 14-1 November 7, 2017 Meeting

ML17333A077
Person / Time
Site:	PROJ0694
Issue date:	11/07/2017
From:	Brian Benney, Joshua Kaizer, Eric Oesterle, Ahsan Sallman Division of Licensing Projects
To:
Benney B
Shared Package
ML17278A096	List: ML17325B399 ML17333A077
References
Download: ML17333A077 (7)

Text

Infogram 14-1 and Containment Analyses November 7, 2017 Brian Benney Ahsan Sallman Joshua Kaizer Eric Oesterle

Objectives

• Discuss Infogram 14-1 issue

• Discuss NRC response

• Discuss Industry response

• Discuss Future Activities

• Q &A

Infogram 14-1

• Infograms are Westinghouse service oriented publications that discuss issues of interest to their customers

• Infogram 14-1 identified a potential non-conservatism in containment analysis

• Volumetric heat capacity for stainless steel (SS) used for reactor coolant system (RCS) metal not consistent with ASME code value

• Non-conservative results in post-accident containment pressures and temperatures

NRC Response

• NRC learned of Infogram 14-1 through interactions with stakeholders

• NRC responded by issuing requests for additional information on license amendment reviews that could be impacted by the issue

• Individual licensees responded by performing analyses to address the issue

Industry Response

• Pressurizer Water Reactor Owners Group (PWROG) engaged NRC to pursue generic industry approach to address the issue

• Closed meetings were held between industry and NRC to review proprietary containment analysis codes used in analyses of record (AOR) by licensees

• Containment analysis codes used in AORs were demonstrated to include substantial conservatism to offset lower SS heat capacity factor - no safety issue

• PWROG proposed submitting a generic topical report (TR) to highlight conservatism in AORs that would address the issue and which licensees could adopt and include in their licensing bases

Current Status & Future Activities

• Based on results of licensees addressing this issue to date, NRC will no longer issue RAIs on license amendment requests that could be impacted by this issue

• Based on focused industry attention and ownership to resolve issue NRC believes that issue can be appropriately addressed through licensee corrective actions programs (i.e., inspection issue vs. licensing issue)

• PWROG is planning to submit a TR to highlight conservatism in AORs such that licensees can include TR in licensing basis and close out corrective action.

Infogram 14-1 Questions?