No. 104 - Miljøstyrelsen
No. 104 - Miljøstyrelsen
No. 104 - Miljøstyrelsen
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5.1.4 Exposure calculations<br />
5.1.4.1 Scenario 1: Short-term exposure for 30 minutes<br />
As described above the short-term exposure is calculated with and without<br />
ventilation.<br />
A calculation using the assumption of no ventilation is the worst case and a<br />
fictive calculation, since there will always be some leaks in a house.<br />
The calculation of the concentration in the breathing zone during an accident<br />
with a broken compact fluorescent lamp or straight fluorescent lamp is done<br />
by dividing the quantity of mercury released from the lamp by 2 m 3 , which is<br />
the volume chosen for the breathing zone. The quantity of mercury released is<br />
calculated as 10 % of the total amount of mercury in the lamp (i.e. 1.2 to 40<br />
mg). The results are shown in Table 5-2 below.<br />
Table 5-2 Calculated concentrations in the breathing zone of mercury with a broken compact fluorescent<br />
lamp/straight fluorescent lamp in a room when it is assumed that only 10 % of total quantity of mercury will<br />
evaporate during the first few hours. The meaning of the green cells is discussed later.<br />
Quantit<br />
y Hg<br />
(mg)<br />
Air<br />
exchang<br />
e (per<br />
hour)<br />
Room<br />
volume<br />
(m 3 )<br />
Ventilatio<br />
n<br />
(m 3 /min)<br />
Room<br />
conc. T<br />
= 0 min<br />
(µ/m 3 )<br />
Room<br />
conc.<br />
T = 5<br />
min<br />
(µ/m 3 )<br />
Room<br />
conc.<br />
T = 10<br />
min<br />
(µ/m 3 )<br />
Room<br />
conc.<br />
T = 15<br />
min<br />
(µ/m 3 )<br />
Room<br />
conc.<br />
T = 30<br />
min<br />
(µ/m 3 )<br />
Room<br />
conc.<br />
T = 45<br />
min<br />
(µ/m 3 )<br />
Room<br />
conc.<br />
T = 60<br />
min<br />
(µ/m 3 )<br />
Room<br />
conc.<br />
T = 120<br />
min<br />
(µ/m 3 )<br />
1,2 0 2 0 60 60 60 60 60 60 60 60<br />
1,2 0,6 2 0,02 60 54 49 44 33 24 18 5,4<br />
1,2 4,2 2 0,14 60 30 15 7,3 0,9 0,1 0,01 0,000<br />
1,4 0 2 0 70 70 70 70 70 70 70 70<br />
1,4 0,6 2 0,02 70 63 57 52 38 28 21 6<br />
1,4 4,2 2 0,14 70 35 17 9 1,0 0,1 0,02 0,000<br />
2 0 2 0 100 100 100 100 100 100 100 100<br />
2 0,6 2 0,02 100 90 82 74 55 41 30 9<br />
2 4,2 2 0,14 100 50 25 12 1,5 0,2 0,02 0,000<br />
2,5 0 2 0 125 125 125 125 125 125 125 125<br />
2,5 0,6 2 0,02 125 113 102 93 69 51 38 11<br />
2,5 4,2 2 0,14 125 62 31 15 1,9 0,2 0,03 0,000<br />
3,5 0 2 0 175 175 175 175 175 175 175 175<br />
3,5 0,6 2 0,02 175 158 143 130 96 71 53 16<br />
3,5 4,2 2 0,14 175 87 43 21 2,6 0,3 0,04 0,000<br />
4,9 0 2 0 245 245 245 245 245 245 245 245<br />
4,9 0,6 2 0,02 245 222 201 182 134 100 74 22<br />
4,9 4,2 2 0,14 245 122 60 30 3,7 0,4 0,06 0,000<br />
5 0 2 0 250 250 250 250 250 250 250 250<br />
5 0,6 2 0,02 250 226 205 185 137 102 75 23<br />
5 4,2 2 0,14 250 124 62 31 3,7 0,5 0,06 0,000<br />
7 0 2 0 350 350 350 350 350 350 350 350<br />
7 0,6 2 0,02 350 317 287 259 192 142 105 32<br />
7 4,2 2 0,14 350 174 86 43 5,2 0,6 0,08 0,000<br />
8 0 2 0 400 400 400 400 400 400 400 400<br />
8 0,6 2 0,02 400 362 327 296 220 163 120 36<br />
8 4,2 2 0,14 400 199 99 49 6,0 0,7 0,09 0,000<br />
9,5 0 2 0 475 475 475 475 475 475 475 475<br />
9,5 0,6 2 0,02 475 430 389 352 261 193 143 43<br />
9,5 4,2 2 0,14 475 236 117 58 7,1 0,9 0,11 0,000<br />
13 0 2 0 650 650 650 650 650 650 650 650<br />
13 0,6 2 0,02 650 588 532 482 357 264 196 59<br />
13 4,2 2 0,14 650 323 160 80 9,7 1,2 0,15 0,000<br />
15 0 2 0 750 750 750 750 750 750 750 750<br />
15 0,6 2 0,02 750 679 614 556 412 305 226 68<br />
15 4,2 2 0,14 750 372 185 92 11 1,4 0,2 0,000<br />
40 0 2 0 2000 2000 2000 2000 2000 2000 2000 2000<br />
40 0,6 2 0,02 2000 1810 1637 1482 1098 813 602 181<br />
40 4,2 2 0,14 2000 993 493 245 30 3,7 0,4 0,000<br />
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