Gas Target: Difference between revisions

From DRAGON Wiki
Jump to navigation Jump to search
Line 33: Line 33:


== Safety with hydrogen as the target gas ==
== Safety with hydrogen as the target gas ==
The following is a brief outline of safety considerations. For more details, consult the DRAGON Safety Report.
The strategy for safe operation with hydrogen gas is:
    *avoid formation of an explosive mixture of air and hydrogen
    *avoid ignition sources at pressures where combustion may take place


=== Normal operation ===
=== Normal operation ===

Revision as of 13:57, 25 June 2025

Revision history
Version Author Description Date
1.0 D. Hutcheon Initial Document 27 September 2002
1.1 D. Hutcheon Hidden valves,shack 4 April 2007
1.2 D. Hutcheon Leak checking 27 April 2007
1.3 D. Hutcheon Decadal update 22 January 2019
1.4 A. Lennarz Transferred to wiki June 25th, 2025

Safety with hydrogen as the target gas

The following is a brief outline of safety considerations. For more details, consult the DRAGON Safety Report.

The strategy for safe operation with hydrogen gas is:

   *avoid formation of an explosive mixture of air and hydrogen 
   *avoid ignition sources at pressures where combustion may take place 


Normal operation

Unattended gas target, trap containing absorbed hydrogen

Protection of equipment

General description of the gas target system

Gas supply shack

Windowless gas target

Operating the target

Pre-run checks

Pumping out the target

Filling the cleaning trap with hydrogen

Filling the cleaning trap with helium

Circulating gas through the target, trap in use

Circulating gas through the target, trap not in use

Checks of an operating target

Temporary pump-out of the target, trap in use

Emptying target and trap at end of running

Venting the target to 1 atmosphere

Hidden valves

Leak checking

Emergency procedures, response to pump trips

Power outage

Loss of compressed air to valves

Pump trips