suit are coated with the powder. When the powder spraying is complete, the
test operator should start the exhaust blower and adjust the blower speed to
maintain a negative pressure within the chamber. When the test chamber air
has been cleared, the test subject should leave the test chamber. The suit
tester should stand just outside the chamber and remove the supplied-air suit
exactly as instructed by the DOE contractor's SOP. The suit tester should
then enter the photography or observation room.
19.2.6 Photographs should be made of the suit tester, with UV lights or equivalent,
using the same poses used for preliminary photographs in 18.104.22.168.1 or
observations will be made with a handheld ultraviolet light.
19.2.7 Any contamination transfer indicated by the UV powder visible in the
photographs or by the analysis of the Millipore filters should constitute cause
to re-examine and consider modification of the supplied-air suit removal
Material Flammability Test
Test Equipment and Requirements
20.1.1 This test method is a modification of the NFPA 701-89 "Flame-Resistant
Textiles and Films." Two modifications of the NFPA test are necessary for
Material that has been treated or conditioned to enhance non-flammability
should be accepted for testing.
The material is not considered self-extinguishing if the material melts,
allowing the flame to drop away and accomplishing extinguishment.
20.1.2 Test Description: This test is performed by cutting supplied-air suit material
into strips of appropriate length, and burning the material in a special shield.
20.1.3 A shield should be constructed from fire-resistant material, having interior
dimensions of approximately 12 in. wide, 12 in. deep, and 30 in. high, and an
opening at the top. The shield should be so constructed as to provide a
ventilating opening 1 in. high around the bottom and should have a viewing
window large enough to permit observation of the entire test specimen. A
spring clamp should be attached rigidly to the shield so that when a specimen
is attached, it will be centered within the shield.
20.1.4 Two strips of supplied-air suit material, 1 in. wide by 18 in. long, should be
cut in both the machined and the transverse directions from each of the
materials being tested. Gauge marks should be drawn across the specimens 3
in. from each end, defining a 12 in. gauge length over which the burning is to