ML21028A443

ACRS Fc NRC Staff Public LTR BWRx-300 Containment Performance Final Slides

ML21028A443
Person / Time
Issue date:	01/28/2021
From:	NRC/NRR/DNRL/NRLB
To:
Shea J
References
Download: ML21028A443 (6)

Text

NRC Staff Presentation-Open Session GEH Topical Report NEDC-33911P, Revision 0, Supplement 1, BWRX-300 Containment Performance BWRX-300 Small Modular Reactor ACRS Subcommittee Meeting February 3, 2021 1

Presentation Outline

• NRC Staff Review Team

• BWRX-300 Containment Background

• NRC Staff Overview of NEDC-33911P 2

NRC Staff Review Team

• NRR Containment and Plant Systems Branch (SCPB)

- Chang-Yang Li

- Angelo Stubbs

• NRR Nuclear Systems Performance Branch (SNSB)

- Syed Haider

• NRR Mechanical Engineering and Inservice Testing Branch (EMIB)

- Yueh-Li (Renee) Li

- Thomas Scarbrough

• NRR Vessels and Internals Branch (NVIB)

- Dan Widrevitz

• NRR New Reactor Licensing Branch (NRLB)

- Rani Franovich

- George Wunder 3

BWRX-300 Containment Design Background

• BWRX-300 containment is an underground subterranean steel or reinforced concrete primary containment vessel (PCV) or a combination of steel and reinforced concrete

• Containment heat is removed by Passive Containment Cooling System (PCCS)

• Combustible gas control is not required for design basis accidents (DBAs) because the BWRX-300 containment atmosphere is well mixed and the containment atmosphere is initially nitrogen-inerted 4

BWRX-300 Containment Performance NEDC-33911P provides design requirements, analytical methods, acceptance criteria, and regulatory bases for:

• Containment and the Passive Containment Cooling System (PCCS)

• Containment isolation valves (CIVs)

• Analytical methods evaluating containment performance

• Acceptance criteria for the BWRX-300 containment performance in accordance with the design requirements specified for the containment, PCCS, and CIVs 5

Overview of NRC Staff Review

• Piping and Valves Design Relevant to Containment Performance

• Containment Functional Design

• Containment Heat Removal Systems

• Secondary Containment Functional Design

• Containment Isolation System

• Combustible Gas Control in Containment

• Containment Leakage Testing

• Fracture Prevention of Containment Pressure Boundary 6