ML23249A109
| ML23249A109 | |
| Person / Time | |
|---|---|
| Site: | 99902049 |
| Issue date: | 09/13/2023 |
| From: | Holtec, SMR |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML23249A106 | List: |
| References | |
| 160-USNRC-054 | |
| Download: ML23249A109 (1) | |
Text
www.holtec.com www.smrllc.com Two Division Safety System Compliance with Applicable Rules and Regulations Date: 9/13/23 Presented By: Patrick Essner SMR, LLC, A Holtec International Company Krishna P. Singh Technology Campus One Holtec Boulevard Camden, NJ 08104, USA
[Not Export Controlled]
holtec.com l smrllc.com l Page 2 Agenda Purpose and Outcome Licensing Strategy Licensing Requirements Conformance of the design to portions of IEEE 603 related to two division design.
holtec.com l smrllc.com l Page 3 Purpose and Outcome The purpose of the meeting is to Familiarize NRC staff with I&C architecture of the SMR-160, focusing on the two-division design and how it complies with applicable regulation The outcome is to obtain feedback from the NRC staff on The approach for complying with regulations in this area The specific ways the SMR-160 I&C complies with available guidance and regulations Future revisions to NRC guidance or regulation in this area
holtec.com l smrllc.com l Page 4 Licensing Strategy for SMR-160 I&C Following Part 50 Process DNRL-ISG-2022-01, provides guidance for I&C content related to Part 50 Points to guidance in the design-specific review standard (DSRS) for NuScale Generic for I&C focused on Digital I&C systems Incorporated some of the lessons learned from review of large LWR designs.
The guidance emphasizes fundamental instrumentation and control (I&C) design principles of independence, redundancy, predictability and repeatability, and diversity and defense in depth.
holtec.com l smrllc.com l Page 5 Licensing Requirements for I&C Design 10 CFR 50.55a requires conformance to IEEE 603-1991.
SAR content will demonstrate full compliance to IEEE 603-1991 Some requirements from IEEE 603 are affected by the design being a two-division safety system.
Single-Failure Criterion Completion of Protective Action Between Redundant Portions of a Safety System Interconnected Equipment Capability for Test and Calibration Capability for Testing and Calibration Operating Bypasses Maintenance Bypass These are the focus of the whitepaper.
holtec.com l smrllc.com l Page 6 Questions for the NRC Are there plans to revise Part 50 to remove IEEE 603-1991 and update the Regulatory Guides to endorse newer versions of IEEE 603?
If so is there a timeline?
Are there any other high priority requirements Related to IEEE 603 or two division design?
holtec.com l smrllc.com l Page 7 Summary of Closed Meeting Materials Overview of the Two Division design.
Detailed description of how the design complies with the highlighted portions of IEEE 603 Single-Failure Criterion Completion of Protective Action Between Redundant Portions of a Safety System Interconnected Equipment Capability for Test and Calibration Capability for Testing and Calibration Operating Bypasses Maintenance Bypass
- Transition to CLOSED portion of the meeting at this time***
holtec.com l smrllc.com l Page 8 Scope
((
))
holtec.com l smrllc.com l Page 9 SMR-160 I&C Architecture
((
))
holtec.com l smrllc.com l Page 10 Single-Failure Criterion
((
))
holtec.com l smrllc.com l Page 11 Single-Failure Criterion
((
))
holtec.com l smrllc.com l Page 12 Single-Failure Criterion
((
))
holtec.com l smrllc.com l Page 13 Single-Failure Criterion in Section 5.1
((
))
holtec.com l smrllc.com l Page 14 Single-Failure Criterion in Section 5.1
((
))
holtec.com l smrllc.com l Page 15 Single-Failure Criterion in Section 6.7
((
))
holtec.com l smrllc.com l Page 16 Independence between PSS divisions
((
))
holtec.com l smrllc.com l Page 17 Independence between PSS and PCS
((
))
holtec.com l smrllc.com l Page 18 Fail Safe
((
))
holtec.com l smrllc.com l Page 19 Conclusion
((
))
www.holtec.com www.smrllc.com Licensing Interactions Related to MELCO LTR Revision and SMR-160 Date:
Presented By:
SMR, LLC, A Holtec International Company Krishna P. Singh Technology Campus One Holtec Boulevard Camden, NJ 08104, USA
[Not Export Controlled]
holtec.com l smrllc.com l Page 21 MELCO Topical Report Revision 3
((
))
holtec.com l smrllc.com l Page 22 MELCO Topical Report Revision Approach
((
))
holtec.com l smrllc.com l Page 23 SMR-160 I&C Topical
((
))
holtec.com l smrllc.com l Page 24 Overall Schedule
((
))