Reference No: A0946

Foreign Object Search and Retrieval (FOSAR): identification and retrieval of foreign materials in Steam Generators

Foreign objects (for example, welding rods, wires, screws, nuts, gasket material) which are introduced by the secondary system are flushed into the lower SG area, “filtered” by the tube bundle and deposited at the tube sheet. Appropriate retrieval of detected foreign objects in a precise and reliable manner without causing any damage to SG tubes is therefore essential. The integral FOSAR concept considers all relevant steps for reliable foreign object search and retrieval.

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