ML102871175

5.3 Maintenance

ML102871175
Person / Time
Site:	Crystal River
Issue date:	01/21/2010
From:	- No Known Affiliation
To:	Office of Information Services
References
FOIA/PA-2010-0116
Download: ML102871175 (1)

Text

5.3 Chemicals Introduced During Routine Maintenance

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Description:==

Routine maintenance of industrial structures can involve the application of deleterious materials, including solvents, cleaning agents, or aggressive water.

ACI committee 515 compiled a list of potential deleterious materials, most of which are either harmless to good quality concrete, require high concentrations, will only attack porous concrete, and/or must be dissolved in water in order to penetrate the concrete.

The issue of chemical attack is addressed in another Failure Mode (FM 5.8).

This document is intended to identify any materials used in maintenance of the concrete shell and determine if these materials could have damaged the concrete.

Data to be collected and Analyzed:

1. Interview maintenance personnel regarding practices that might affect the concrete (FM 5.3 Exhibit land 3).

2. Review and analyze information regarding possible deleterious materials (FM 5.3 Exhibit 2 is the comprehensive list of potential harmful chemicals compiled by ACI 515).

Verified Supporting Evidence: None Verified Refuting Evidence:

a. Interviews with personnel of Crystal River 3 (CR3) reveal that no chemicals were applied to the concrete during regular maintenance.

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Conclusion:==

Maintenance did not involve application of any chemicals to the concrete and was not a contributing factor to the delamination.

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