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|  DOE-STD-1066-99
15.3.2.2 Design Considerations
In selecting the type of automatic fire suppression system for installation in
a glovebox under this standard, the designer should, as a minimum,
consider the following:
o potential for criticality;
o potential for contamination spread;
o effectiveness of the fire extinguishing agent on the anticipated type of
fire;
o impact of the fire extinguishing agent on HEPA filters;
o potential for overpressurizing the glovebox due to activation of the
extinguishing system;
o anticipated changes in glovebox use or operations which will increase the
level of fire hazard; and
o potential for inadvertent operation and the anticipated consequences.
15.3.2.3 Existing Halon Fire Suppression Systems
Existing halon fire suppression systems which protect gloveboxes may
continue in service if all of the following criteria are met:
o The system is considered "essential" under Environmental Protection
Agency regulations. (See also the Guidance on the DOE Facility
Phaseout of Ozone-Depleting Substances, October 1995.)
o The glovebox is required to have an automatic fire suppression system.
o The system complies with NFPA Standard 12A.
o The system is designed for automatic operation. The detection method
should be designed to prevent inadvertent operation. (The use of
"deadman" abort switches is acceptable.)
Existing halon fire suppression systems which do not meet the above criteria
should be replaced with a suitable automatic fire suppression system.
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