Neutronics and shielding analysis of the National Ignition Facility
The Department of Energy (DOE) is proposing to construct the National Ignition Facility (NIF) by the year 2001 to embark on a program to achieve ignition and modest gain in the laboratory. The NIF will use 1.8 MJ of 0.35 {mu}m laser light, nearly a fifty-fold increase in energy over the Nova laser at Lawrence Livermore National Laboratory (LLNL). A 5-m radius spherical aluminum chamber will contain the target experiments and allow access to diagnostics for data collection. Based on a projected maximum annual yield of 385 MJ (1.4 {times} 10{sup 20} 14 MeV neutrons), prompt annual doses will be < 1.2 {mu}Sv at the nearest site boundary, < 0.43 mSv immediately outside the Target Area, and < 30 {mu}Sv in the war-room and control room. The target chamber material has been selected in a trade-off between its mechanical properties and its neutron activation qualities. External target chamber shielding has been selected such that the total annual occupational dose to Target Area workers will be {le} 5 mSv. Finally, some Target Area systems have been redesigned based on their neutron activation and residual dose rates. The operation of the NIF will have an insignificant impact to workers and the general population.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10173619
- Report Number(s):
- UCRL-JC-115585; CONF-940630-31; ON: DE94016698; TRN: 94:016659
- Resource Relation:
- Conference: 11. topical meeting on the technology of fusion energy,New Orleans, LA (United States),19-24 Jun 1994; Other Information: PBD: Jun 1994
- Country of Publication:
- United States
- Language:
- English
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LASER FUSION REACTORS
SHIELDING
NEUTRON DOSIMETRY
COMPUTER CALCULATIONS
INERTIAL CONFINEMENT
RADIATION PROTECTION
DOSE EQUIVALENTS
RADIATION DOSES
THERMONUCLEAR REACTIONS
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700411
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INERTIAL CONFINEMENT DEVICES
NEUTRON PHYSICS
DOSIMETRY AND MONITORING