Facility target insert shielding assessment

Mocko, Michal¹ 

[1] Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

关键词: Nuclear Physics & Radiation Physics(73);    Radiation Protection & Dosimetry(61) Accelerator Design;    Technology;    and Operations;    Mo-99 production facility;    shielding;   

DOI  :  10.2172/1223181
RP-ID  :  LA-UR--15-27786
PID  :  OSTI ID: 1223181

美国|英语

来源: SciTech Connect

【 摘 要 】

Main objective of this report is to assess the basic shielding requirements for the vertical target insert and retrieval port. We used the baseline design for the vertical target insert in our calculations. The insert sits in the 12???-diameter cylindrical shaft extending from the service alley in the top floor of the facility all the way down to the target location. The target retrieval mechanism is a long rod with the target assembly attached and running the entire length of the vertical shaft. The insert also houses the helium cooling supply and return lines each with 2??? diameter. In the present study we focused on calculating the neutron and photon dose rate fields on top of the target insert/retrieval mechanism in the service alley. Additionally, we studied a few prototypical configurations of the shielding layers in the vertical insert as well as on the top.