Gilson and Voss - Voss Associates
Gilson and Voss - Voss Associates
Gilson and Voss - Voss Associates
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AIR MONITORING<br />
Concentration<br />
Concentration is activity per volume of air <strong>and</strong> may be stated as<br />
dpm / cubic meter, ìCi / ml, or Bq / cubic meter. DAC (Derived<br />
Air Concentration) is another way to express airborne<br />
radioactivity concentrations as relative hazards.<br />
DPM = Sample CPM / Eff (CPM / DPM)<br />
1 ìCi = 2.22 E6 DPM<br />
3<br />
1 DPM / M = 4.5 E-13 ìCi / ml<br />
1 ìCi / ml = 2.22 E12 DPM / M 3<br />
1 Bq = 1 DPS<br />
3<br />
DPM / M =<br />
3<br />
CPM/(Eff x total sample volume in M )<br />
ìCi / ml = CPM/(Eff x 2.22 E6 DPM / ìCi x total<br />
sample volume in ml)<br />
3<br />
Bq / M = CPM / (Eff x 60 DPM / Bq x total sample<br />
3<br />
volume in M )<br />
DAC = ìCi / ml ( ìCi / ml per DAC {DAC Factor} )<br />
1 DAC-h = 1 DAC exposure for 1 hour<br />
1 DAC-h = 2.5 mrem = 25 ìSv<br />
1 DAC for Pu239 is 4.44 DPM / M 3<br />
Calculate the number of DAC-h on a filter by this formula<br />
# DAC-h = # of DPM on filter<br />
(Sample flow rate in LPM x 1.332E11 x DAC factor)<br />
Calculate the DPM on a filter to reach 8 DAC-h<br />
DPM = 8 DAC-h x flow rate in LPM x 1.33E11 x DAC factor<br />
Calculate the DAC level on a filter from the # of DPM<br />
DAC = # of DPM<br />
(DAC factor x LPM x time in minutes x 2.22E9)<br />
Page 70<br />
AIR MONITORING<br />
Concentration<br />
Concentration is activity per volume of air <strong>and</strong> may be stated as<br />
dpm / cubic meter, ìCi / ml, or Bq / cubic meter. DAC (Derived<br />
Air Concentration) is another way to express airborne<br />
radioactivity concentrations as relative hazards.<br />
DPM = Sample CPM / Eff (CPM / DPM)<br />
1 ìCi = 2.22 E6 DPM<br />
3<br />
1 DPM / M = 4.5 E-13 ìCi / ml<br />
1 ìCi / ml = 2.22 E12 DPM / M 3<br />
1 Bq = 1 DPS<br />
3<br />
DPM / M =<br />
3<br />
CPM/(Eff x total sample volume in M )<br />
ìCi / ml = CPM/(Eff x 2.22 E6 DPM / ìCi x total<br />
sample volume in ml)<br />
3<br />
Bq / M = CPM / (Eff x 60 DPM / Bq x total sample<br />
3<br />
volume in M )<br />
DAC = ìCi / ml ( ìCi / ml per DAC {DAC Factor} )<br />
1 DAC-h = 1 DAC exposure for 1 hour<br />
1 DAC-h = 2.5 mrem = 25 ìSv<br />
1 DAC for Pu239 is 4.44 DPM / M 3<br />
Calculate the number of DAC-h on a filter by this formula<br />
# DAC-h = # of DPM on filter<br />
(Sample flow rate in LPM x 1.332E11 x DAC factor)<br />
Calculate the DPM on a filter to reach 8 DAC-h<br />
DPM = 8 DAC-h x flow rate in LPM x 1.33E11 x DAC factor<br />
Calculate the DAC level on a filter from the # of DPM<br />
DAC = # of DPM<br />
(DAC factor x LPM x time in minutes x 2.22E9)<br />
Page 70<br />
AIR MONITORING<br />
Concentration<br />
Concentration is activity per volume of air <strong>and</strong> may be stated as<br />
dpm / cubic meter, ìCi / ml, or Bq / cubic meter. DAC (Derived<br />
Air Concentration) is another way to express airborne<br />
radioactivity concentrations as relative hazards.<br />
DPM = Sample CPM / Eff (CPM / DPM)<br />
1 ìCi = 2.22 E6 DPM<br />
3<br />
1 DPM / M = 4.5 E-13 ìCi / ml<br />
1 ìCi / ml = 2.22 E12 DPM / M 3<br />
1 Bq = 1 DPS<br />
3<br />
DPM / M =<br />
3<br />
CPM/(Eff x total sample volume in M )<br />
ìCi / ml = CPM/(Eff x 2.22 E6 DPM / ìCi x total<br />
sample volume in ml)<br />
3<br />
Bq / M = CPM / (Eff x 60 DPM / Bq x total sample<br />
3<br />
volume in M )<br />
DAC = ìCi / ml ( ìCi / ml per DAC {DAC Factor} )<br />
1 DAC-h = 1 DAC exposure for 1 hour<br />
1 DAC-h = 2.5 mrem = 25 ìSv<br />
1 DAC for Pu239 is 4.44 DPM / M 3<br />
Calculate the number of DAC-h on a filter by this formula<br />
# DAC-h = # of DPM on filter<br />
(Sample flow rate in LPM x 1.332E11 x DAC factor)<br />
Calculate the DPM on a filter to reach 8 DAC-h<br />
DPM = 8 DAC-h x flow rate in LPM x 1.33E11 x DAC factor<br />
Calculate the DAC level on a filter from the # of DPM<br />
DAC = # of DPM<br />
(DAC factor x LPM x time in minutes x 2.22E9)<br />
Page 70<br />
AIR MONITORING<br />
Concentration<br />
Concentration is activity per volume of air <strong>and</strong> may be stated as<br />
dpm / cubic meter, ìCi / ml, or Bq / cubic meter. DAC (Derived<br />
Air Concentration) is another way to express airborne<br />
radioactivity concentrations as relative hazards.<br />
DPM = Sample CPM / Eff (CPM / DPM)<br />
1 ìCi = 2.22 E6 DPM<br />
3<br />
1 DPM / M = 4.5 E-13 ìCi / ml<br />
1 ìCi / ml = 2.22 E12 DPM / M 3<br />
1 Bq = 1 DPS<br />
3<br />
DPM / M =<br />
3<br />
CPM/(Eff x total sample volume in M )<br />
ìCi / ml = CPM/(Eff x 2.22 E6 DPM / ìCi x total<br />
sample volume in ml)<br />
3<br />
Bq / M = CPM / (Eff x 60 DPM / Bq x total sample<br />
3<br />
volume in M )<br />
DAC = ìCi / ml ( ìCi / ml per DAC {DAC Factor} )<br />
1 DAC-h = 1 DAC exposure for 1 hour<br />
1 DAC-h = 2.5 mrem = 25 ìSv<br />
1 DAC for Pu239 is 4.44 DPM / M 3<br />
Calculate the number of DAC-h on a filter by this formula<br />
# DAC-h = # of DPM on filter<br />
(Sample flow rate in LPM x 1.332E11 x DAC factor)<br />
Calculate the DPM on a filter to reach 8 DAC-h<br />
DPM = 8 DAC-h x flow rate in LPM x 1.33E11 x DAC factor<br />
Calculate the DAC level on a filter from the # of DPM<br />
DAC = # of DPM<br />
(DAC factor x LPM x time in minutes x 2.22E9)<br />
Page 70