SHIELDING ANALYSIS FOR X-RAY SOURCES GENERATED IN TARGET CHAMBER OF THE NATIONAL IGNITION FACILITY

Conference · Thu Mar 27 00:00:00 EDT 2008

DOI:https://doi.org/10.13182/NT09-A9213· OSTI ID:932401

Khater, H Y; Brereton, S J; Singh, M S

Prompt doses from x-rays generated as result of laser beam interaction with target material are calculated at different locations inside the National Ignition Facility (NIF). The maximum dose outside a Target Chamber diagnostic port is {approx} 1 rem for a shot utilizing the 192 laser beams and 1.8 MJ of laser energy. The dose during a single bundle shot (8 laser beams) drops to {approx} 40 mrem. Doses calculated outside the Target Bay doors and inside the Switchyards (except for the 17 ft.-6 in. level) range from a fraction of mrem to about 11 mrem for 192 beams, and scales down proportionally with smaller number of beams. At the 17ft.-6 in. level, two diagnostic ports are directly facing two of the Target Bay doors and the maximum doses outside the doors are 51 and 15.5 mrem, respectively. Shielding each of the two Target Bay doors with 1/4 in. Pb reduces the dose by factor of fifty. One or two bundle shots (8 to 16 laser beams) present a small hazard to personnel in the Switchyards.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 932401
• Report Number(s): LLNL-CONF-402641; TRN: US0803529
• Resource Relation: Journal Volume: 168; Journal Issue: 2; Conference: Presented at: 11th International Conference on Radiation Shielding, Pine Mountain, GA, United States, Apr 13 - Apr 18, 2008
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AMND ASSOCIATED PLANTS
61 RADIATION PROTECTION AND DOCIMETRY
42 ENGINEERING
DOORS
LASERS
PERSONNEL
RADIATIONS
SHIELDING
TARGET CHAMBERS
TARGETS
US NATIONAL IGNITION FACILITY
X-RAY SOURCES