Technical Basis For Radiological Acceptance Criteria For Uranium At The Y-12 National Security Complex

Veinot, K. G.

Oak Ridge Y-12 Plant

关键词: Criticality;    Daughter Products;    Uranium;    99 General And Miscellaneous//Mathematics, Computing, And Information Science;    Alara;   

DOI  :  10.2172/979444
RP-ID  :  RCO/TBD-060, Rev 1
RP-ID  :  DE-AC05-00OR22800
RP-ID  :  979444

美国|英语

来源: UNT Digital Library

【 摘 要 】

The purpose of this report is to establish radiological acceptance criteria for uranium. Other factors for acceptance not considered include criticality safety concerns, contaminants to the process stream, and impacts to the Safety Basis for the affected facilities. Three types of criteria were developed in this report. They include limits on external penetrating and non-penetrating radiation and on the internal hazard associated with inhalation of the material. These criteria are intended to alleviate the need for any special controls beyond what are normally utilized for worker protection from uranium hazards. Any proposed exceptions would require case-by-case evaluations to determine cost impacts and feasibility. Since Y-12 has set rigorous ALARA goals for worker doses, the external limits are based on assumptions of work time involved in the movement of accepted material plus the desire that external doses normally received are not exceeded, and set so that no special personnel monitoring would be required. Internal hazard controls were established so that dose contributions from non-uranium nuclides would not exceed 10% of that expected from the uranium component. This was performed using a Hazard Index (HI) previously established for work in areas contaminated with non-uranium nuclides. The radiological acceptance criteria for uranium are summarized in Table 1. Note that these limits are based on the assumption that radioactive daughter products have reached equilibrium.