Research on im provement of sealing welding process for CRDM socket flange and penetration assemblies

CHEN Junfeng

doi:10.7512/j.issn.1001-2303.2020.11.11

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Research on im provement of sealing welding process for CRDM socket flange and penetration assemblies
Vol. 50, Issue 11, Pages: 58-63(2020)
DOI： 10.7512/j.issn.1001-2303.2020.11.11

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CHEN Junfeng. Research on im provement of sealing welding process for CRDM socket flange and penetration assemblies. [J]. 50(11):58-63(2020)
DOI：

CHEN Junfeng. Research on im provement of sealing welding process for CRDM socket flange and penetration assemblies. [J]. 50(11):58-63(2020) DOI： 10.7512/j.issn.1001-2303.2020.11.11.

摘要

CRDM管座贯穿件密封焊根部焊接裂纹问题一直以来困扰着各大核设备制造厂。提出一种解决根部裂纹问题的工艺改进措施,并通过焊接数值模拟方法进行模拟分析,改进了CRDM管座贯穿件密封焊接工艺,解决了根部焊接裂纹问题。改进后的焊接工艺通过了焊接工艺评定的验证。最终,改进后的焊接工艺应用于产品制造,21根CRDM管座贯穿件密封焊缝所有检验一次合格。

Abstract

The crack of the welding root for the CRDM socket flange and penetration assemblies has been puzzling the manufacturers of nuclear island equipment. In this paper,the process improvement measures of welding root crack were proposed. In addition,the welding process of it was optimized by welding simulation to solve weld crack problem. Ultimately the improved process was qualified by the welding procedure qualification. Finally,21 CRDM pipe socket penetration seal welds of the product were inspected and qualified at one time.