LSO 9: Non-beam Hazards

Question 1

What is Non- beam Hazards?

Answer 1

A class of hazards that result from factors other than direct human exposure to a laser beam

Question 2

What are types of Non-beam Hazards?

Answer 2

Physical, chemical, biological, mechanical and ergonomic

Question 3

Why to worry?

Answer 3

No death due to the beam, same not true for non-beam hazards, workers : electrocution, Patients : fire

Question 4

What is physical hazards: collateral and plasma radiation

Answer 4

12…..Radio frequency leakage.

Question 5

Physical hazards: X-ray Radiation : Thyratron switches and free electron

Answer 5

Voltage > 12 v

Question 6

What is Physical hazards: Fire

Answer 6

Always there is fire hazards  with class 4 lasers
With the class 3B: always focus to create an irradiance > 10W/cm2

Question 7

Physical hazards: Explosion hazards

Answer 7

combustible dust, arc lamp and filament lamps

Question 8

Physical Hazards: Noise

Answer 8

Potentially hazardous high noise can be created from : high voltage capacitor discharges, laser peening

Question 9

What is the permissible dbA for 8 hrs work schedule?

Answer 9

90 dba

Question 10

Physical Hazards: Temperature extremes

Answer 10

Can generate a great deal of heat - cooling liquids, cryogenic fluids. Increased humidity or condensation

Question 11

Chemical Hazards: What is Laser Eye hazards?

Answer 11

Liquid dye used as lasing medium, to control hazards, treat all dyes as hazardous chemicals, use in chemical fume hoods, appropriate PPR use

Question 12

What are the control of compressed Gas hazards?

Answer 12

SOPs, store hazardous gases in an appropriate exhausted enclosure, permanently pipe the gas to the laser, secured cylinders, ensure regulators are in good condition

Question 13

Chemical Hazards:LGAC

Answer 13

can create air contaminants

Question 14

What are the protection against LGAC?

Answer 14

Respiratory protection, isolation of process, exhaust ventilation system

Question 15

What is Ergonomics Laser Hazards

Answer 15

poor work station layout, repetitive motion injuries to arms, hands, and wrists
limited work space that can exacerbate other hazards such as mechanical and electrical hazards
unusual work patterns ( different work shifts)

Question 16

What is another human factors disposal of Laser?

Answer 16

Donation, eliminate the possibility of activation, destroy the laser.
Laser Waste must be handled and disposed of in accordance with federal, state and local regulations