10 



THREADED 



FOR CLOSURE 



EXTRACTION 



CLOSURE 



GROUNDED ELECTRICAL 

 LEAD 



^INSULATED ELECTRICAL 

 N LEAD 



STEEL BACK-UP RING 

 0-RING 



LEAD BACK-UP RING 



CONE 



INSULATED 

 ELECTRICAL LEAD 



GROUNDED ELECTRICAL 

 LEAD 



FIGURE 6 DETAILS OF PRESSURE VESSEL CLOSURE 



