ML101180262
| ML101180262 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 12/28/2009 |
| From: | Progress Energy Carolinas |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2010-0116 | |
| Download: ML101180262 (2) | |
Text
Root Cause Analysis - P11 MetriCS as of Dec 2811,2009 Open Failure Modes 80 70 60 50 40 30 20 10 0
- (9) External Events (8) Operational Events
- (7) Inadequate Containment Cutting
- (6) Inadequate Concrete - Tendon interactions a (5) Chemically or Environmentally Induced Aging 0 (4) Shrinkage, Creep and Settlement 0 (3) Inadequate Use of Concrete Materials (2) Inadequate Concrete Construction
- (1) Inadequate Concrete Design due to High Local Stress SProgress Energy I I I
C~4(~.I z +.z 0000 a
0z z (T--1 IL1 z;
Iz La
~
11 1
Root Cause Analysis - PH MetriCS as of Dec 28th 2009 Failure Modes Identified (to date) as Potential Contributors 16-1 (9) External Events 14 (8) Operational Events 12
- (7) Inadequate Containment 10 -
Cutting
- (6) Inadequate Concrete -
8
-Tendon interactions
- (5) Chemically or 6
Environmentally Induced Aging
- (4) Shrinkage, Creep and 4
Settlement m (3) Inadequate Use of Concrete 2
Materials (2) Inadequate Concrete 0
,T-V_--,-,-,
Construction Note that while there is some evidence suggesting that conditions physically exist to support these failure modes, they may still transition to a "Refuted" status as the root cause analysis Progress Energy 2
proceeds, and their specific contribution to the root cause is further quantified/analyzed