ML102920088

8.4 Inadequate Concrete Structure

ML102920088
Person / Time
Site:	Crystal River
Issue date:	03/17/2010
From:	- No Known Affiliation
To:	Office of Information Services
References
FOIA/PA-2010-0116
Download: ML102920088 (1)

Text

8.4 Inadequate Concrete Structure Monitoring/Maintenance (ILW)

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Description:==

The Tendon Surveillance Program, contained within the ASME Section XA Containment Inspection Program, includes a provision to conduct a visual examination of the containment exterior surface (IWL). These containment surface monitoring inspections sometimes result inrepairs to the concrete surfacet.

Data to be collected and Analyzed:

1. Review the Tendon Surveillance Program procedure for the periodic containment monitoring (ILW). (FM 8.4 Exhibit 1)

2. Review the most recent IWL Monitoring. (FM 8.4 Exhibit 2)

Verified Refuting Evidence: Verified Supporting Evidence:

1. Containment outer surface inspections were conducted in accordance with the procedure. The Not applicable purpose of those inspections are to "determine the general structural condition of concrete -

surfaces of containments by identifying areas of concrete deterioration and distress..."(Exhibit 1, ILW Section 2300, pg 252 as numbered at the bottom of the page)

2. The most recent IWL monitoring was conducted a few days prior to beginning the SGR hole cut activities (FM 8.4 Exhibit 2) and did not reveal any surface abnormalities that would suggest an indication of delamination. In addition, itis neither likely that delamination would be detected during the periodic concrete surface inspections, nor was itthe purpose of the (IWL) inspections to detect internal delaminations of the containment structure.

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Conclusion:==

The IWL monitoring was adequate for its intended purpose.

May identify additional perspective on this issue as RCA related efforts proceeds By O-R 03/17/2010 -emzpýp 1 r- Ij rt