ML19162A078

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ABWR DC Renewal Issue 09 SE Section 6.2.1.9 ECCS Strainers Rev 5
ML19162A078
Person / Time
Site: 05200045
Issue date: 06/26/2019
From: James Shea
NRC/NRO/DLSE
To: Michelle Catts
GE Hitachi Nuclear Energy, Advisory Committee on Reactor Safeguards
Shea J
Shared Package
ML19162A065 List:
References
Download: ML19162A078 (26)


Text

6.2.1.9Containment Debris Protection for ECCS Strainers Regulatory Criteria

Code of Federal Regulations

"After any calculated successful initial operation of the ECCS, the calculated core temperature shall be maintained at an acceptably low value and decay heat shall be removed for the extended period of time required by the long-lived radioactivity remaining in the core."

  • 6.2.1.9.2Summary of Technical Information

6.2.1.9.3Technical Evaluation

Chemical Effects Introduction/

Background:

Applicant's Approach to Addressing Chemical Effects

Staff Evaluation of Chemical Effects

  • Chemical Effects Evaluation Summary

ECCS Systems and Components Post-LOCA Fluid Constituents RHR, HPCF, and RCIC Pump Evaluation

Heat Exchanger Evaluation

Blockage Evaluation for Components Such as Valves, Orifices, Pipes, and Spray Nozzles/Spargers

Instrument Tubing Blockage Evaluation Wear Evaluation for Components Such as Pumps, Valves, Orifices, Pipes and Spray Nozzles/Spargers

Debris Settling Evaluation for Valves, Orifices, Pipes, and Spray Nozzles Chemical Effects Evaluation for Ex-Vessel Downstream Components

Introduction/Background

Applicant's Approach for Addressing In-vessel Downstream Effects

Staff Evaluation of In-vessel Downstream Effects

Conclusion