ENS 41819
ENS Event | |
|---|---|
20:15 May 5, 2005 | |
| Title | Part 21 Notification of Failed Surface Coatings on Fans |
| Event Description | Howden Buffalo provided the following information via facsimile:
In accordance with subject regulation and Howden Buffalo internal procedures, Howden Buffalo is submitting a report of a defect or failure to comply for basic components supplied to a nuclear facility. Duke Energy, Oconee Plant, reported insufficient adhesion of Carboline topcoat to Carboline primer, resulting in separation of the topcoat on two fans and one other fan inlet bell. The items were manufactured, painted, and supplied to Duke Oconee during the period February 2002 thru March 2002, as basic components in a nuclear safety related application. The three affected items were part of ten complete fans delivered to Duke Oconee both before and after the affected units. Howden Buffalo conducted an initial investigation that included both Duke Power Materials Engineering & Lab Services and Carboline. Our investigation concluded that coating materials were not defective however, application of Carboline primer was not in accordance with Carboline recommendations for sufficient curing of the primer, resulting in accumulation of VOC's from the uncured primer and ultimate separation of the topcoats. Howden Buffalo has reviewed internal plant procedures for application of Carboline primer and topcoat, including surface preparation, and found that the procedures failed to incorporate Carboline updated requirements for sufficient curing of the primer. All internal procedures are now revised to incorporate Carboline requirements in their entirety. Howden Buffalo procedures for supplying Carboline coating as a basic component were applicable during the period of October 2001 thru March 2005. Howden Buffalo is contacting each of these customers to a) advise of a potential defect in the Carboline coating, b) recommend inspection criteria, and c) provide contact information. Summary evaluation: Review of documentation for this sales order, including all paint surveillance records, does not support a conclusion that this defect is limited only to the fans delivered for this order. Root cause of paint failure would appear to be insufficient training in procedures for surface preparation and preparation and application of primer and paint. Environmental limitations for temperature and relative humidity may not have been correctly considered for drying time requirements. Notification to NRC and to all customers of safety-related coating is required. Howden Buffalo item number: 540059-080 Reactor building cooling unit fans serial numbers 004, 005, and 006 Nature of defect: Insufficient adhesion of Carboline topcoat to Carboline primer - topcoat flaking from two fans and one fan inlet bell. Affected safety related orders: Duke (Oconee) shipped 11/2/01 Exelon (Dresden) shipped 3/28/03 Edison Material Supply (SONGS) shipped 7/28/04 Amergen Energy (Oyster Creek) shipped 10/31/02 |
| Where | |
|---|---|
| Howden Buffalo New Philadelphia, Ohio (NRC Region 3) | |
| Organization: | Howden Buffalo |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+1366.28 h56.928 days <br />8.133 weeks <br />1.872 months <br />) | |
| Opened: | Paul Stewart 18:32 Jul 1, 2005 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Jul 2, 2005 |
| 41819 - NRC Website | |
Howden Buffalo with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 418192005-05-05T20:15:0005 May 2005 20:15:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Part 21 Notification of Failed Surface Coatings on Fans 2005-05-05T20:15:00 | |