ML050880518
| ML050880518 | |
| Person / Time | |
|---|---|
| Site: | Kewaunee  |
| Issue date: | 03/17/2005 |
| From: | Satorius M Division Reactor Projects III |
| To: | |
| References | |
| ea-05-021, IR-04-009 | |
| Download: ML050880518 (10) | |
Text
Regulatory Conference Regulatory Conference Kewaunee Containment Hatch Closure Kewaunee Containment Hatch Closure Nuclear Regulatory Commission Nuclear Regulatory Commission -- Region III Region III Lisle, Illinois Lisle, Illinois March 17, 2005 March 17, 2005
Introduction and Opening Remarks Introduction and Opening Remarks Mark Satorius Mark Satorius Director Director Division of Reactor Projects Division of Reactor Projects
Agenda Agenda 1.1.
Introduction and Opening Remarks Introduction and Opening Remarks 2.2.
Overview of Event and Inspection Finding Overview of Event and Inspection Finding a.a. Description of Containment Hatch Issue Description of Containment Hatch Issue b.b. Description of Apparent Violation Description of Apparent Violation c.c. Preliminary Safety Significance Determination Preliminary Safety Significance Determination 3.3.
Licensee Presentation Licensee Presentation 4.4.
NRC Caucus NRC Caucus 5.5.
Closing Remarks Closing Remarks
Description Description Steel Rail System Installed for Reactor Head Replacement Steel Rail System Installed for Reactor Head Replacement Curvature of Containment Hatch Not Considered in Design Curvature of Containment Hatch Not Considered in Design Steel Rail System Obstructed Hatch Closure Steel Rail System Obstructed Hatch Closure Inability to Close Containment Equipment Hatch Expeditiously Inability to Close Containment Equipment Hatch Expeditiously Fuel was in the Reactor Vessel Fuel was in the Reactor Vessel Time to Boil < 30 minutes Time to Boil < 30 minutes One Emergency Diesel Generator Out of Service One Emergency Diesel Generator Out of Service Reactor Coolant System Opened to Containment Atmosphere Reactor Coolant System Opened to Containment Atmosphere
Performance Deficiency Performance Deficiency NUMARC 91 NUMARC 91--06, Section 4.1.1 06, Section 4.1.1 Applicable to Containment Hatch or Penetrations that Applicable to Containment Hatch or Penetrations that Communicate with Containment Atmosphere Communicate with Containment Atmosphere Hatch Either be Closed or Capable of being Closed Hatch Either be Closed or Capable of being Closed Prior to Core Boiling Following a Loss of Decay Heat Removal Prior to Core Boiling Following a Loss of Decay Heat Removal Addressed by Procedure Addressed by Procedure Procedure Developed to Close Hatch If Needed Procedure Developed to Close Hatch If Needed Poor Track Design Not Identified Poor Track Design Not Identified Numerous Opportunities for Identification Numerous Opportunities for Identification
Apparent Violation Apparent Violation 10 CFR 50, Appendix B, Criterion V:
10 CFR 50, Appendix B, Criterion V:
Instructions, Procedures, and Drawings Instructions, Procedures, and Drawings Plant Procedure CMP Plant Procedure CMP--89 89--AA--02 02 required that any equipment which passes through and could required that any equipment which passes through and could obstruct containment hatch closure be designed to allow rapid obstruct containment hatch closure be designed to allow rapid removal in order to ensure expeditious containment building removal in order to ensure expeditious containment building equipment hatch closure.
equipment hatch closure.
Interior Rail System was not designed to allow rapid Interior Rail System was not designed to allow rapid removal in order to ensure expeditious containment removal in order to ensure expeditious containment hatch closure.
hatch closure.
Safety Significance Determination Safety Significance Determination (Preliminary)
(Preliminary)
Phase I:
Phase I:
IMC 0609 Appendix A (Attachment 1) and Appendix H IMC 0609 Appendix A (Attachment 1) and Appendix H Type B Finding (affects only LERF, not CDF)
Type B Finding (affects only LERF, not CDF)
Phase II:
Phase II:
IMC 0609 Appendix H IMC 0609 Appendix H In In--depth Mitigation Capability depth Mitigation Capability White Finding White Finding Phase III:
Phase III:
Station Blackout Scenarios Station Blackout Scenarios White Finding White Finding
Licensee Presentation Licensee Presentation
NRC Caucus NRC Caucus
Closing Remarks Closing Remarks Mark Satorius Mark Satorius Director Director Division of Reactor Projects Division of Reactor Projects