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Page Title:
Table 4-12. ARFs and RFs from the Venting of Pressurized Powders |
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|  DOE-HDBK-3010-94
4.0 Solids; Powders
Table 4-12. ARFs and RFs from the Venting of Pressurized Powders
(Tables A.1, A.2, A.3, B.1, B.2 and B.3 - Sutter August 1983 and
Tables A.5 and A.6 - Ballinger, Sutter and Hodgson May 1987)
ARF
RF
Material
Pressure, MPag
0.64, Material adhered to ceiling
6.9
4.5E-2
TiO2
No RF, cascade impactor overloaded
3.4
6.1E-2
0.40/0.44
9.8E-2
0.54/0.40, Pressurized gas release
1.09E-1
9.0E-2
0.34
UO2
9.0E-2
0.31
No RF, cascade impactor overloaded
1.7
2.89E-2
TiO2
0.44
7.6E-2
0.48/0.72, Pressurized gas release
1.05E-1
6.0E-2
0.42
UO2
6.0E-2
0.29
No RF, cascade impactor overloaded
0.69
9.4E-3
TiO2
No RF, cascade impactor overloaded
0.34
6.2E-3
0.38/0.48
3.6E-2
0.46/0.88, Pressurized gas release
4.5E-2
0.33
2.0E-2
UO2
0.31
2.0E-2
0.35
1.73E-3
0.17
0.60
1.11E-3
0.12
0.61
5.0E-5
0.06
4.4.2.3.2 Venting of Pressurized Powders or Pressurized Gases Through
Powders, Pressure < 0.17 MPag. The values for the airborne release during the venting of
pressurized powders at lower pressures, 0.17 MPAg (25 psig) or less, reported in Ballinger,
Sutter and Hodgson (May 1987) are substantially lower than those covered above. With the
exception of a single value (6E-3), all ARFs for the venting of pressurized powders at these
pressures were 3E-3 or less. The three values listed in Table 4-12 for source masses of
powder of 350 g are less than 2E-3. Since the data is very limited (only six results at 3
pressures 0.17 MPAg and less reported with only three listed in Table 4-12), a conservative
ARF of 5E-3 is assessed to be bounding for these situations. This value is commensurate
Page 4-73
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