RECENTLY OBSERVED PROBLEMS WITH PRESENT TIDVG 30/07/2014 – “LIU-SPS External Beam Dump” Ivo Leitão

Present TIDVG Upper Yoke Core Lower Yoke Graphite Aluminium Copper Tungsten * More details on current and previous design: Pasdeloup’s presentation TIDVG2013 (BA1-SPS)  Known issues:  Prone to water leaks  High degassing rate  Very Radioactive

Damaged TIDVG * TIDVG’s downstream side Aluminium Debris  Is the damage acceptable?

Damaged TIDVG *Video made with industrial endoscope on the TIDVG2013 (downstream side) currently installed in the BA1-SPS

TIDVG2014  (New) TIDVG2004 should be ready by 31th/Aug. Bldg. 954

ProblemCauseLSS1 Corrective Solution(s)Future Solution(s) Water connections prone to leaks Old design (70’s) Fragile connections Aluminium gaskets Copper gaskets solution In situ water leak test New design (robust connections) High degasing rate Graphite blocks Graphite blocks bake-out Core bake-out In situ bake-out* External beam design (using a beam window?) Damaged Dump (Aluminium block) Excessive Beam Load New spare** Temperature sensors Controlled beam load (?) New design (considering future upgrades?) Maintenance operations with high accumulated dose Very radioactive device Specific training Tools and procedures optimization Remote handling (Telemax) Include design for “remote handling” and “end-of-life considerations“ Problems/Causes/Solutions * To be confirmed ** Should be ready by the 31th Aug.

Future implications  Maximum admissible beam load must be defined and controlled in order to avoid further accidents.  Do we have other beam dumps in similar conditions?

THANK YOU 30/07/2014 – “LIU-SPS External Beam Dump” Ivo Leitão