Time and motion study for the National Ignition Facility target area
Abstract
The Department of Energy (DOE) is proposing to construct the National Ignition Facility (NIF) to embark on a program to achieve ignition and modest gain in the laboratory. With annual fusion yields of up to 1200 MJ/year, neutron activation of nearby components is an important issue. Calculations must be performed to ensure that Target Area structures are designed and activities are planned in a way that ensures that such activities can be completed at the required times while meeting all requirements for occupational exposure to radiation. These calculations are referred to as {open_quotes}Lime-motion{close_quotes} studies. In the present work, key Target Area activities are identified and a detailed time-motion study has been completed for the task of debris shield change-out. Results of a preliminary time-motion study for debris shield change-out were used to influence the design. Subsequent analyses have been completed for several point designs of the NIF Final Optics Assembly (FOA). For each FOA point design, a total annual occupational dose equivalent, in person-Sv, has been estimated. Estimates range from 0.19 person-Sv/year (19 person-rem/year) for a composite FOA with a polyethylene plug to 1.38 person-Sv/year (138 person-rem/year) for the baseline FOA design.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 379083
- Report Number(s):
- UCRL-JC-123552; CONF-960912-25
ON: DE96013439; TRN: 96:025542
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Conference
- Resource Relation:
- Conference: International topical meeting on probabilistic safety assessment - moving toward risk based regulation, Park City, UT (United States), 29 Sep - 3 Oct 1996; Other Information: PBD: 10 Jun 1996
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION; TARGET CHAMBERS; OPTICAL SYSTEMS; SHIELDING; RADIATION PROTECTION; DESIGN; INERTIAL CONFINEMENT
Citation Formats
Latkowski, J F, and Tobin, M T. Time and motion study for the National Ignition Facility target area. United States: N. p., 1996.
Web.
Latkowski, J F, & Tobin, M T. Time and motion study for the National Ignition Facility target area. United States.
Latkowski, J F, and Tobin, M T. 1996.
"Time and motion study for the National Ignition Facility target area". United States. https://www.osti.gov/servlets/purl/379083.
@article{osti_379083,
title = {Time and motion study for the National Ignition Facility target area},
author = {Latkowski, J F and Tobin, M T},
abstractNote = {The Department of Energy (DOE) is proposing to construct the National Ignition Facility (NIF) to embark on a program to achieve ignition and modest gain in the laboratory. With annual fusion yields of up to 1200 MJ/year, neutron activation of nearby components is an important issue. Calculations must be performed to ensure that Target Area structures are designed and activities are planned in a way that ensures that such activities can be completed at the required times while meeting all requirements for occupational exposure to radiation. These calculations are referred to as {open_quotes}Lime-motion{close_quotes} studies. In the present work, key Target Area activities are identified and a detailed time-motion study has been completed for the task of debris shield change-out. Results of a preliminary time-motion study for debris shield change-out were used to influence the design. Subsequent analyses have been completed for several point designs of the NIF Final Optics Assembly (FOA). For each FOA point design, a total annual occupational dose equivalent, in person-Sv, has been estimated. Estimates range from 0.19 person-Sv/year (19 person-rem/year) for a composite FOA with a polyethylene plug to 1.38 person-Sv/year (138 person-rem/year) for the baseline FOA design.},
doi = {},
url = {https://www.osti.gov/biblio/379083},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jun 10 00:00:00 EDT 1996},
month = {Mon Jun 10 00:00:00 EDT 1996}
}