Table 3-13. Measured Uranium ARFs During the Burning of TBP-Kerosine Over Aqueous Phase

DOE-HDBK-3010-94

3.0 Liquids; Organic, Combustible Liquids

Figure A.10 of Appendix A. The liquids were heated by heating tapes wrapped around the

metal beaker except in the single case where a borosilicate glass beaker was used. In this

case, radiant heat panels were used. The organic liquid ignited and air (27.5-cfm) was

drawn up the 25.4-cm diameter chimney. Airborne particles were collected on glass fiber

filters as a function of time. The pertinent data taken from Table A.6 in the reference

document (original data tables reproduces as Table A.19 in Appendix A) are tabulated in

Table 3-13.

Table 3-13. M easured Uranium ARFs During the Burning of

TBP-Kerosine Over Aqueous Phase

(Table A.6 - Halverson, Ballinger and Dennis, February 1987)

Solutions Tested

Burn Duration, m in

ARF

Rem ark s

100 ml 30% TBP-kerosine (U) +

27.5

4.04E-3

Aqueous boiled over and

100 ml acid

34.8

5.57E-3

quenched fire, 40% to 60%

53.3

4.34E-3

organic unburned

100 ml 30% TBP-kerosine (U) +

24.8

2.52E-2

Aqueous boiled over and

100 ml acid (FP)

34.0

2.70E-2

quenched fire, 40% to 60%

organic unburned

100 ml 40% TBP-kerosine + 100

61.3

5.98E-2

Burned to dry residue

ml acid (U + FP)

65.0

7.09E-2

Burned to dry residue

50 ml 40% TBP-kerosine + 150 ml

40.0

1.7E-3

~40% organic unburned

acid (U + FP)

50 ml 30% TBP-kerosine (U) +

57.3

1.56E-2

Unburned organic residue

150 ml acid (U + FP)

50 ml 30% TBP-kerosine (U) +

51.0

8.09E-3

Unburned organic residue

100 ml acid (U + FP)

The measured values for ARF appear to have two orders of magnitude variation. The

conservative upper bound ARF is 1E-1. The RF was only measured for one experiment

[50 ml 30% TBP-kerosine (U) + 150 ml acid (U + FP)] with a value of 0.99. In most cases,

heat transferred through the metal solution holder resulted in a boilover that terminated the

burning. Use of glass holders or no external heat addition after ignition delayed boilover.

Only in experiments #52 and #53 (40% TBP in normal paraffin hydrocarbon) using heating

tape to heat the liquid did the burning proceed to complete dryness. It appears that burning

the liquids to dryness increases the ARF; the two highest measured ARFs are from this

configuration (6.0E-2 and 7.1E-2). The variation found for the other experimental

configurations may be partially due to the vigor in boiloff and composition of the aqueous

phase. The presence of salts in the aqueous phase may result in a slightly greater heat

Page 3-45