Projected Life of the SLAC Linac Braze Joints: Braze integrity and corrosion of cooling water hardware on accelerator sections

Glesener, W. F. ; Garwin, E. L.

Stanford Linear Accelerator Center

关键词: Corrosion;    43 Particle Accelerators;    Accelerators,Accsys;    Environmental Effects;    Water;   

DOI  :  10.2172/887074
RP-ID  :  SLAC-TN-06-006
RP-ID  :  AC02-76SF00515
RP-ID  :  887074

美国|英语

来源: UNT Digital Library

【 摘 要 】

The objective of this study was to ascertain the condition of braze joints and cooling water hardware from an accelerator section after prolonged use. Metallographic analysis was used to examine critical sites on an accelerator section that had been in use for more than 30 years. The end flange assembly showed no internal operational damage or external environmental effects. The cavity cylinder stack showed no internal operational damage however the internal surface was highly oxidized. The internal surface of the cooling water tubing was uniformly corroding at a rate of about 1 mil per year and showed no evidence of pitting. Tee fitting internal surfaces are corroding at non-uniform rates due to general corrosion and pitting. Remaining service life of the cooling water jacket is estimated to be about 20 years or year 2027. At this time, water supply pressure will exceed allowable fitting pressure due to corrosion of tubing walls.