ML102920516

Photo

ML102920516
Person / Time
Site:	Crystal River
Issue date:	09/20/2010
From:	Progress Energy Co
To:	Office of Information Services
References
FOIA/PA-2010-0116
Download: ML102920516 (2)

Text

4~2

Root Cause Analysis - PII Metrics as of Dec 3 rd 2009 Open Failure Modes 80

~u i) External Events 60~

(;) Operational Events QT) Inadequate Containment Cutting 40 30 20 10 0

• (E in Ir (Z

.) Inadequate teractions Concrete - Tendon

)Chemically or Environmentally duced Aging

) Shrinkage, Creep and

• ttlement

) Inadequate laterials Use of Concrete wI~(,

C

'.) Inadequate Concrete onstruction U

V NýPN

bVNV, VV e

[](1) Inadequate Concrete Design due to High Local Stress Pro ress Energy 1