ORNL is managed by UT-Battelle for the US Department of Energy Hazard Categorization Threshold Quantities for Tritium William C. Walker Nuclear Facility Safety Engineer Nuclear and Radiological Protection Division Oak Ridge National Laboratory May 16, 2018
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Hazard Categorization Threshold Quantities for Tritium...2 Hazard Categorization Threshold Quantities for Tritium (May 2018) Timeline of Tritium TQs History of HC-2 and HC-3 TQ values
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ORNL is managed by UT-Battelle
for the US Department of Energy
Hazard Categorization Threshold Quantities for Tritium
William C. Walker
Nuclear Facility Safety Engineer
Nuclear and Radiological Protection Division
Oak Ridge National Laboratory
May 16, 2018
2 Hazard Categorization Threshold Quantities for Tritium (May 2018)
Timeline of Tritium TQs
History of HC-2 and HC-3 TQ values for Tritium in DOE-STD-1027
Version
Category 2
TQ
Category 3
TQ Comments
DOE-STD-1027-92
(1992)
3.0E+05 Ci
3.0E+01 g
1.0E+03 Ci
1.0E-01 g
Tritium threshold was lowered from its calculated
value to 1000 curies based on a recommendation of
the Tritium Task Force.
DOE-STD-1027-92 CN-1
(1997)(Unch.)
1.6E+04 Ci
1.6E+00 g
TFG requested Tritium Cat 3 TQ be calculated same
as all other radionuclides.
NNSA Supplemental
Guidance (2014)(Unch.) (Unch.)
NNSA published updated TQs for all DOE-STD-1027
radionuclides except for Tritium.
DOE-STD-1027-DRAFT
(2018)(Unch.) (Unch.) Updated TQs for +1,250 radionuclides, except tritium.
3 Hazard Categorization Threshold Quantities for Tritium (May 2018)
Comparison of Current and Updated Cat 2 Tritium TQ