ML102910613

Email-From: Orf, Tracy to Lake, Louis Dated Tuesday, December 22, 2009 6:31 Am Subject:Fw CR3 Updated Root Cause Information Attachments: 2009 Dec 18 - Root Cause Update for Nrc. Pptx

ML102910613
Person / Time
Site:	Crystal River
Issue date:	12/22/2009
From:	Orf T Plant Licensing Branch II
To:	Lake L NRC/RGN-II/DRS/EB3
References
FOIA/PA-2010-0116
Download: ML102910613 (2)

Text

Sengupta, Abhijit From: Oil, Tracy Sent: Tuesday, December 22, 2009 6:31 AM To: Lake, Louis

Subject:

FW: CR3 Updated Root Cause Information Attachments: 2009 Dec 18 - Root Cause Update for NRC.pptx P -ký

.From: McCabe, Brian [1]

Sent: Monday, December 21, 2009 7:34 AM To: Wert, Leonard; Sykes, Marvin; Kennedy, Kriss; Franke, Mark; Saba, Farideh; Orf, Tracy

Subject:

CR3 Updated Root Cause Information See attached.

Happy Holidays and I hope you have a great 2010.

Brian K?!

Root Cause Analysis - PII Metrics as of Dec 18th 2009 Open FailureModes 80 n (9) External Events 70 (8) Operational Events 60 * (7) Inadequate Containment Cutting 50 * (6) Inadequate Concrete - Tendon interactions 40 11111 ll * (5) Chemically or Environmentally Induced Aging 30 * (4) Shrinkage, Creep and Settlement 20 * (3) Inadequate Use of Concrete Materials 10 * (2) Inadequate Concrete Construction 0 > 80 0 0 0 0 0 4,) 0 0

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0 0 0 0 0 0 0A0 4)4) 0 0 0 0 r)4) 0

4) 4) 4) 4) * (1) Inadequate Concrete Design 004 (0b 03 0 0 0 Z Z z z z ze4 z z z z z z z z z6 00 4) 0 &4 C4) due to High Local Stress rý IN d) ' 6 4 (b Ob C14 ce) 6 l",l CAI 4 (14 4- 6 01 ,4 Cb (N4

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~ Progress Energy 1