Study on the inspection technique and maintenance solution for BOSS welds

The BOSS which is also called the set-on branch connection is a new structure used in nuclear power plant in recently years. The BOSS weld failure may lead to borated water leakage, and it will probably affect the safety of the equipment in the pressurized water reactor nuclear power plants (PWRs)....

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Bibliographic Details
Published in2018 IEEE Far East NDT New Technology & Application Forum (FENDT) pp. 42 - 45
Main Authors XIA, Peng, YANG, Cheng, ZENG, Qing-yue, YAN, Hai
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2018
Subjects
BOSS weld failures
Defect growth
Inductors
Inspection
Maintenance engineering
Maintenance solution
Power generation
Radiographic inspection
Radiography
Safety
Welding
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Summary:The BOSS which is also called the set-on branch connection is a new structure used in nuclear power plant in recently years. The BOSS weld failure may lead to borated water leakage, and it will probably affect the safety of the equipment in the pressurized water reactor nuclear power plants (PWRs). In this study, causes of BOSS weld failures were studied first. Then through the technique features of radiographic inspection, an applicable inspection technique for BOSS welds in PWRs was summarized. Combining the experience feedback of BOSS weld failures at home and abroad, a useful maintenance solution was proposed. In the end, some feasible suggestions for improving the quality of BOSS welds were established from the point of views of design process, welding process and inspection process.
DOI:10.1109/FENDT.2018.8681969