10 CFR Part 110, Appendix P to Part 110 - Category 1 and 2 Radioactive Material

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View PDF at GPO Pt. 110, App. P
Appendix P to Part 110—Category 1 and 2 Radioactive Material
Table 1—Import and Export Threshold Limits
Radioactive material Category 1 Category 2
Terabequerels(TBq) Curies(Ci) 1 Terabequerels(TBq) Curies(Ci) 1
1 The values to be used to determine whether a license is required are given in TBq. Curie (Ci) values are provided for practical usefulness only and are rounded after conversion.
2 The limits for Pu-238 and Pu-239/Be in this table apply for imports to the U.S. The limits for exports of Pu-238 and Pu-239/Be can be found in § 110.21.
a Discrete sources of radium-226.
Americium-241 60 1,600 0.6 16
Americium-241/Be 60 1,600 0.6 16
Californium-252 20 540 0.2 5.4
Curium-244 50 1,400 0.5 14
Cobalt-60 30 810 0.3 8.1
Cesium-137 100 2,700 1.0 27
Gadolinium-153 1,000 27,000 10.0 270
Iridium-192 80 2,200 0.8 22
Plutonium-2382 60 1,600 0.6 16
Plutonium-239/Be 2 60 1,600 0.6 16
Promethium-147 40,000 1,100,000 400 11,000
Radium-226 a 40 1,100 0.4 11
Selenium-75 200 5,400 2.0 54
Strontium-90 (Y-90) 1,000 27,000 10.0 270
Thulium-170 20,000 540,000 200 5,400
Ytterbium-169 300 8,100 3.0 81
Calculation of Shipments Containing Multiple Sources or Radionuclides
The “sum of fractions” methodology for evaluating combinations of radionuclides being transported, is to be used when import or export shipments contain multiple sources or multiple radionuclides. The threshold limit values used in a sum of the fractions calculation must be the metric values (i.e., TBq).
I. If multiple sources and/or multiple radionuclides are present in an import or export shipment, the sum of the fractions of the activity of each radionuclides must be determined to verify the shipment is less than the Category 1 or 2 limits of Table 1, as appropriate. If the calculated sum of the fractions ratio, using the following equation, is greater than or equal to 1.0, then the import or export shipment exceeds the threshold limits of Table 1 and the applicable security provisions of this part apply.
II. Use the equation below to calculate the sum of the fractions ratio by inserting the actual activity of the applicable radionuclides or of the individual sources (of the same radionuclides) in the numerator of the equation and the corresponding threshold activity limit from the Table 1 in the denominator of the equation. Ensure the numerator and denominator values are in the same units and all calculations must be performed using the TBq (i.e., metric) values of Table 1.
R1 = activity for radionuclides or source number 1
R2 = activity for radionuclides or source number 2
RN = activity for radionuclides or source number n
AR1 = activity limit for radionuclides or source number 1
AR2 = activity limit for radionuclides or source number 2
ARN = activity limit for radionuclides or source number n
[70 FR 37993, July 1, 2005, as amended at 71 FR 20339, Apr. 20, 2006]

Title 10 published on 2014-01-01

The following are only the Rules published in the Federal Register after the published date of Title 10.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2014-07-10; vol. 79 # 132 - Thursday, July 10, 2014
    1. 79 FR 39289 - Export Controls and Physical Security Standards
      GPO FDSys XML | Text
      NUCLEAR REGULATORY COMMISSION
      Final rule.
      The final rule is effective August 11, 2014, except that the changes to § 110.44(a) and (b)(1) and appendix M to 10 CFR part 110 are effective December 31, 2014. The incorporation by reference of the material in this document is approved as of December 31, 2014.
      10 CFR Part 110

Title 10 published on 2014-01-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 10 CFR 110 after this date.

  • 2014-07-10; vol. 79 # 132 - Thursday, July 10, 2014
    1. 79 FR 39289 - Export Controls and Physical Security Standards
      GPO FDSys XML | Text
      NUCLEAR REGULATORY COMMISSION
      Final rule.
      The final rule is effective August 11, 2014, except that the changes to § 110.44(a) and (b)(1) and appendix M to 10 CFR part 110 are effective December 31, 2014. The incorporation by reference of the material in this document is approved as of December 31, 2014.
      10 CFR Part 110