EPRI 2000 Session: Pressure Vessel and Primary Circuit Inspection
RPV Internal Core Spray Ultrasonic Examination
J. Hayden, GE Inspection Services
ABSTRACT
Overview of the Core Spray Cracking Phenomenon Damage mechanism - IGSCC Welding and system installation residual stresses Plant Experiences - summary of core spray cracking instances High-risk core spray welds: BWR/2 BWR/3-5 BWR/6 Examination Challenges Remote, deep underwater weld locations Piping installed close to various interfering structures Thin-wall components Challenging weld joint configurations (Provide sketch for each listed below) P1: Thermal sleeve-to-junction box (T-box) P3: Junction box-to-header P8a: Shroud attachment thermal sleeve-to-run pipe P9: Run pipe weld internal to shroud attachment thermal sleeve GE's Approach and Capabilities Choice of examination system delivery modes (Include photos/ACAD images) Highly-maneuverable submarine vehicle Pole-mounted delivery Specialized ultrasonic search units BWRVIP demonstrated examination techniques Field Implementation Plant experience Examination findings Domestic Foreign
Publication Source: 2nd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, May 24-26, 2000, New Orleans, Louisiana USA. Publisher: EPRI - [Homepage]
