ML050460194

Part 21 Report Re Field Complaint About Masterpatch 240CR. Florida Power & Light Reported to Degussa That When Masterpatch 240 CR Was Applied, It Did Not Harden Properly

ML050460194
Person / Time
Site:	Saint Lucie, Turkey Point
Issue date:	02/11/2005
From:	Wernthaler K Degussa Construction Chemicals
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML050460194 (1)

Text

degussa.

creatingessentials Degussa Construction Chemicals, Inc.

February 11, 2005 889 Valley Park Drive Shakopee, MN 55379 Document Control Desk www.degussa.com U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 Re: Field Complaint about Masterpatch 240CR Dr. Konrad Wemthaler VP. R&D/Technology To Whom It May Concern: T 952-496-6369 F 952-233-8402 Pursuant to 10 CFR part 21, this letter is intended to notify the NRC about a problem konrad.wemthaler~degussa-com with a product manufactured by Degussa Construction Chemicals and sold to Florida Power and Light located at 6501 South Ocean Drive, Jensen Beach, FL 34957-2041, an entity licensed by the NRC as a commercial nuclear power plant.

Masterpatch 240 CR repair concrete is a proprietary blend of Portland cement, graded aggregate and additives. This flowable repair concrete is suited for full depth repairs on horizontal and formed vertical or overhead surfaces.

On December 15, 2004, Florida Power and Light reported to Degussa that when Masterpatch 240 CR was applied, it did not harden properly and failed to achieve the expected strengths within the expected time frame (1 and 3 days). Reportedly, the material was chipped out and replaced by a new batch of Masterpatch 240 CR supplied by us on December 16, 2004.

The material in question, prior to being shipped, had been tested twice by Degussa Construction Chemicals and had performed according to specifications both times.

However, when the material was used in the field, it reportedly failed. Degussa was not advised by our customer how the Masterpatch 240 CR was being used. We have investigated the reported failure but have been unable to determine the cause of the problem.

To our knowledge, Florida Power and Light was the only customer within the last year licensed by the NRC purchasing this material. Their reporting of the problem to Degussa indicates their awareness of the issue. Therefore, unless we discover relevant new information, this letter will be our final notification.

If you have any questions or need additional information, please contact Alice McFarland, Quality Assurance Manager, at 216-839-7343. If needed, I can be reached at 952-496-6369.

Retpectfully, K rad WernthaV Vice President, R&D and Technology Degussa Construction Chemicals

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