ML102910685

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Email - from: Fagan, Paul (Paul.Fagan@Pgnmail.Com) to: Lakelf@Bellsouth.Net; Lake, Louis Cc: Miller, Garry Dated Monday December 14, 2009 11:14 Am Subject: Emailing: 2009 Dec 11 - Root Cause Update for Nrc.Pptx Attachments: 2009 Dec 11 - Ro
ML102910685
Person / Time
Site: Crystal River Duke Energy icon.png
Issue date: 12/14/2009
From: Fagan C
Progress Energy Co
To: Lake L
NRC/RGN-II/DRS/EB3
References
FOIA/PA-2010-0116
Download: ML102910685 (3)


Text

Sengb~pta, Ab~hijit From:

Sent:

To:

Cc:

Subject:

Attachments:

Fagan, Paul [Paul.Fagan @ pgnmail.com]

Monday, December 14, 2009 11:14 AM

'lakelf @ bellsouth.net'; Lake, Louis Miller, Garry Emailing: 2009 Dec 11 - Root Cause Update for NRC.pptx 2009 Dec 11 - Root Cause Update for NRC.pptx -.

The message is ready to be sent with the following file or link attachments:

2009 Dec 11 - Root Cause Update for NRC.pptx Note: To protect against computer viruses, e-mail programs may prevent sending or receiving certain types of file attachments. Check your e-mail security settings to determine how attachments are handled.

1 rol U ý (Yý

Root Cause Analysis - P11 Metrics as of Dec 11th 2009 Open Failure Modes (yet to be supported or refuted) 80 70 60 50 40 30 20 10 I~I

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) Inadequate Concrete - Tendon teractions

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  • (1) Inadequate Concrete Design due to High Local Stress 2Progress Energy

Root Cause Analysis - PII Metrics as of Dec 11th 2009 Failure Modes Identified (to date) as Potential Contributors 16 14 12 10 8

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) Inadequate Concrete -

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a Note that wtlie there is some evidence suggesting that conditions physically exist to sup!

these failure modes, they may still transition to a "Refuted" status as the root cause anal) proceeds, a d their specific contribution to the root cause is further quantified/analyzed 2