Coatings are applied to structures and components in nuclear power plants, both inside and outside containment. The coatings applied to safety-related structures, systems, and components inside containment are classified a Service Level I Coating, and coating systems outside of primary containment, but which in the event of a failure could adversely affect the orderly and safe shutdown of the plant are classified a Service Level III coating. Weaknesses have been found in existing programs in regards to application of protective coatings for Service Level 1. This weakness is evident as blistering, cracking or peeling. For the extended period of operation, the licensee must demonstrate that in-place coating is qualified except for coatings shown on an Unqualified Coatings List; that the amount of unqualified coatings will not clog sump screens, strainers, or other safety-related equipment; and that coating assessment is being made at each refueling outage. This paper will discuss the elements of a good coating program for the period of extended operation to ensure that existing coating systems are qualified; and that unqualified and degraded coatings will not clog strainers, screens or other safety-related equipment.
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ASME 2002 Pressure Vessels and Piping Conference
August 5–9, 2002
Vancouver, BC, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4655-5
PROCEEDINGS PAPER
Managing Aging of Coatings for Nuclear Power Plant License Renewal
Henry R. Miller
Henry R. Miller
Sargent & Lundy, LLC, Chicago, IL
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Henry R. Miller
Sargent & Lundy, LLC, Chicago, IL
Paper No:
PVP2002-1377, pp. 81-85; 5 pages
Published Online:
August 14, 2008
Citation
Miller, HR. "Managing Aging of Coatings for Nuclear Power Plant License Renewal." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. Selected Topics on Aging Management, Reliability, Safety and License Renewal. Vancouver, BC, Canada. August 5–9, 2002. pp. 81-85. ASME. https://doi.org/10.1115/PVP2002-1377
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