Re: Plasma Torch Cutting

[John Andrews <andrewsjp@chartertn.net>]

Plasma cutting was used in the Peach Bottom Unit 1 End Of Life program.  

The steam generator was opened using plasma cutting and the steam 

generator tubes were removed for sampling purposes.  PECO should still 

have the report.  The work was done by Catalytic for General Atomic in 

San Diego in the mid 70's.  The plasma arc cutting generated large 

amounts of airborne iron oxide.  HEPA filters clogged up frequently and 

the continuous air monitor would load up very quickly.  Actual airborne 

radioactivity was not a major problem, but monitoring it was.  Both 

Cs-137 and Sr-90 were the contaminants.  I planned the radiological 

safety program, but was not on site for the actual work.



John Andrews

Knoxville, Tennessee



Dave Biela wrote:



>We are doing some work using a plasma cutter on contaminated stainless

>steel and would like to discuss lessons learned with others who have

>used this method.

>

>One of the main questions is:  What were your ratios of airborne

>contamination concentrations in the work area to contamination levels on

>the cut surfaces?

>

>If your interested in a discussion, contact me directly at

>dave.biela@wvnsco.com  or

>716-942-4423

>

>Thanks

>Dave Biela

>  

>





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