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Category:General FR Notice Comment Letter
MONTHYEARML24200A1852024-07-17017 July 2024 Comment (1) of Frances A. Pimentel on Draft Regulatory Guides: Design-Basis Floods for Nuclear Power Plants and Guidance for Assessment of Flooding Hazards Due to Water Control Structure Failures and Incidents ML24173A0042024-06-14014 June 2024 Comment (1) of Individual on Draft NUREG: Event Report Guidelines ML24173A0052024-06-14014 June 2024 Comment (2) of Tony Brown on Behalf of Nuclear Energy Institute (NEI) on Draft NUREG: Event Report Guidelines ML24114A0252024-04-0808 April 2024 Comment (4) of Charlotte Shields on DG-5080 Uas Question ML24093A0392024-03-28028 March 2024 Comment (1) of Thomas Basso on Preparing Probabilistic Fracture Mechanics Submittals ML24081A0872024-03-14014 March 2024 Comment of Janet R. 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Austgen on Draft Regulatory Guide: General Site Suitability Criteria for Nuclear Power Stations ML23284A3892023-10-10010 October 2023 Comment (8) of Ben Holtzman on Guidance for a Technology-Inclusive Content of Application Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Advanced Reactors ML23270B9552023-09-27027 September 2023 Comment (2) of Stewart Yuen on Proposed Revision to Standard Review Plan Section 15.0, Introduction - Transient and Accident Analyses ML23242A0412023-08-25025 August 2023 Comment (2) of Brett Titus on Behalf of NEI on Draft NUREG: Revision to Subsequent License Renewal Guidance Documents, and Supplement to Associated Technical Bases Document ML23236A5292023-08-21021 August 2023 Comment (6) of Bruce S. 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SUNSI Review Complete Template=ADM-013 E-RIDS=ADM-03 ADD: Michael Eudy, Bridget Curran, Mary Neely Comment (3)
Publication Date: 3/10/2023 Citation: 88 FR 14956 QUESTION:
I am consolidating industry comments on DG-1374 to submit during the public comment period. Can you please clarify the intent of the criteria in Section C.b.1.2.2? Are these criteria intended to apply during the design and testing phases of the digital lifecycle? This will help us provide the appropriate feedback/comments.
NRC RESPONSE:
As stated in IEEE Std. 7-4.3.2-2016, if self-diagnostic functions are integrated into the safety system, these functions shall be subject to the same verification and validation (V&V) processes as the safety functions. This standard further states, in part, that for V&V refer to IEEE Std. 1012-2012.
IEEE Std 1012 is a process standard that defines the V&V processes in terms of specific activities and related tasks. This standard states, in part, that the life cycle processes at the system, software, or hardware levels may be conducted in parallel for systems or system elements at the same level. The full set of life cycle processes (system, software, or hardware, as appropriate) are applied to each product.
In the same way, system V&V is applied recursively for each system of the system of interest, and software or hardware V&V is applied to each system element.
DG-1374 (Revision of RG 1.152) endorses IEEE Std. 7-4.3.2-2016 with exceptions and clarifications. With regard to self-diagnostics criteria, DG-1374 provides clarification with supplemental guidance, including Section C.b.1.2.2. This supplemental guidance does not exclude any phase of the safety-related DI&C systems lifecycle, and therefore Section C.b.1.2.2 of DG-1374 should apply throughout the system lifecycle.
From: CAMPBELL, Alan <adc@nei.org>
Sent: Thursday, March 23, 2023 10:15 AM To: Khoi Nguyen <Khoi.Nguyen@nrc.gov>
Cc: Michael Eudy <Michael.Eudy@nrc.gov>
Subject:
[External_Sender] DG-1374 Question
- Khoi, I am consolidating industry comments on DG-1374 to submit during the public comment period. Can you please clarify the intent of the criteria in Section C.b.1.2.2? Are these criteria intended to apply during the design and testing phases of the digital lifecycle? This will help us provide the appropriate feedback/comments.
- Thanks,
Alan Alan Campbell, PE l Technical Advisor Nuclear Energy Institute 1201 F Street NW, Suite 1100 l Washington, DC 20004 P: 202.739.8011 M: 202.439.3698 nei.org