berkeley lab ih monitoring issues at accelerators jim floyd advanced light source lbl
TRANSCRIPT
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Berkeley Lab
IH Monitoring Issues at Accelerators
Jim Floyd
Advanced Light Source
LBL
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Berkeley Lab
Chemical monitoring in user facilities
• Staff vs. Users
• Similar Exposure Groups (SEGs) for Users
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Berkeley Lab
Engineered Nanomaterials
• Notice N456.1“Using best available hazard information, conduct
exposure assessment for all nanotechnology activities involving UNP.”
• Sampling issues—Desire to use real-time particle counters
• Signal to noise problems• Establishing technical bases
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Berkeley Lab
Example
Collect
Particle counts and filters from: both the source material and the work observation
Analyze filters by microscopy and bulk analytical methods
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Berkeley Lab
Nano example
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Berkeley Lab
Nano example
•Nanostructures consistent with the source material accounted for ~0.3 particles/cc
•Nanoparticles/nanostructures not consistent with the source material accounted for ~40 particles/cc
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Berkeley Lab
Nano
• Sampling—Developing this technical basis at our nano science
center
—Hope to be able to apply it at elsewhere
• Standards—Carbon nanotube (CNTs)
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Berkeley Lab
Lasers
• Baseline eye exams—Standard practice—Acceptance of third-party exams (“portability”)—Exemptions if under escort
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Berkeley Lab
Other non-ionizing radiation
• Magnetic fields—5 gauss work areas
• RF
• UV
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Berkeley Lab
Noise
• Most work is well below below ACGIH thresholds— 85 dBA (for 8 hours)
• But ubiquitous “nuisance noise” —Starting to use Preferred Speech Interference Level (PSIL)
for guidance on prioritizing mitigations.— 72 dB (at 500, 1000, 2000 Hz)
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Berkeley Lab
Oxygen Deficiency
Standardized application for accelerator tunnels, etc.
(FNAL, et al.)
Application to lab environments is a little tricky
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Berkeley Lab
The Usual Suspects
Peeling Lead Paint on Dome Soldering Station