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DOE/DSA RIN: 1992-AA51 Publication ID: Fall 2016 
Title: Occupational Radiation Protection 

10 CFR 835, Appendix C was published in the Federal Register on January 25, 2011 (76 FR 4258) to provide updated Derived Air Concentration (DAC) values for determining radiation dose from inhaled radioactive material. The updated dose conversion factors were based on an 8 hour work day exposure time instead of the previously used 24 hour calendar day exposure. The DAC values for several radionuclides having a half-life of less than 2 hours and a certain decay mode were inadvertently not revised for the 8 hour work day exposure time. The proposed amendment to Appendix C would provide the correct DAC values for this small group of radioactive materials.

10 CFR part 835, Appendix E was published in the Federal Register on November 4, 1999 (63 FR 59689). This appendix listed incorrect minimum amounts of radioactivity for 2 isotopes of rhodium which are necessary to activate certain requirements in the rule for controlling these materials. The proposed amendment to Appendix E would provide the correct values.

Agency: Department of Energy(DOE)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 10 CFR 835   
Legal Authority: 28 U.S.C. 2461    42 U.S.C. 2201    42 U.S.C. 2282(a)    42 U.S.C. 7191    50 U.S.C. 2410   
Legal Deadline:  None
Action Date FR Cite
NPRM  11/00/2016 
Final Action  01/00/2017 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
James Randall Dillard
Director, Office of Worker Safety and Health Policy
Department of Energy
Defense and Security Affairs
1000 Independence Avenue SW.,
Washington, DC 20585
Phone:301 903-1165