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UV Safety Training

UV Equipment users Safety Awareness course
by

Katharine Sullivan

on 24 May 2016

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Transcript of UV Safety Training

UV Equipment users Safety Awareness Course
Underlying Legislation
UV damage
Ultraviolet Light Sources
General Protective Measures
Personal Protective Equipment (PPE)
Unsafe practice
Safe Practice
The Control of Artificial Optical Radiation at Work Regulations 2010

Health and Safety at Work Act, 1974 requires that employers protect workers from hazards in the workplace.

International Commission on Non-Ionizing Radiation Protection (ICNIRP) have recommendations.

These recommendations are Maximum Permitted Exposure (MPE). Which is a maximum time permissible for exposure to UV of different wavelengths.
UV and the Eye

Overexposure to UV can lead to temporary damage to the cornea, (photokeratitis).

Which is a violent itching or sand like sensation in the eyes.This may last 48-72 hours and is extremely painful. No permanent damage to the eye is expected.

UVA is absorbed by the lens of the eye over time this can leads to cataracts. If the lens has removed the same exposure can cause permanent retinal damage, resulting in blindness.
Ultraviolet Light Sources

Tansilluminators – UVA/UVB

Sterilising equipment - UVC

TLC viewing cabinets –UVA/UVB

Cadmium/mercury lamps - Optical spectroscopy

UV Curing Lamps -UVA/UVB

Photochemical reactors - Variable
Hierarchy of hazard control
Elimination
Substitution
Engineering
Administration
Personal protective equipment
General Protective Measures
UV sources should be in a room away from the main lab. This is to protect other lab users.
UV sources should operated in polycarbonate housing.
If polycarbonate housing is easily removed PPE should be used.
Avoiding glossy or shiny metal surfaces in the vicinity of UV sources.
Warning Signs
Personal Protection
Protective face masks must be worn if polycarbonate housing is easily to removed.

Skin on hand and arms which may be exposed must be protected by wearing gloves and long sleeved clothing
Personal Protective Equipment (PPE)
UV protective eyewear regulations
Labelled ‘FOR UV PROTECTION’
Must conform to BS EN 170 2C-1,2
I supply of tested visors ready to be used!
Unsafe practice
Once we have learned a skill, there is little need for conscious thought about what we are doing. This can lead to slips and lapses.
Not reading/signing Local rules or Risk Assessment
No warning signs
Not wearing face shield
Leaving gap between gloves and labcoat
Messy work area
Safe Practice
Interlocks working to prevent accidental exposure
Appropriate use of Hazard signs
Risk assessment
PPE - Use of face shield and gloves
Tidy work area
Transilluminator lid down
Help and Questions
Lab supervisor
School Safety Advisors
Radiation Safety Unit-56982
Katharine.Sullivan@manchester.ac.uk
Visor transmissions
UV and the Skin - Other damage

UVC 280-100nm
Penetrates to the Stratum Comeum

UVB 315-280nm
Penetrates to the Epidermis

UVA 400-315 nm
Penetrates to the Dermis so is the most effective wavelength at causing photoaging which is characterised by leathery wrinkled skin and a loss of elasticity

UV and the skin - Cancers

UV is a known carcinogen
. In 2012 there was a 78% rise in men and 48% in women in skin cancer.There are three main kind of skin cancer
Basal Cell Cancer
often appears as a pink pearl-like mole. In most cases it does not spread and can be easily cured.
Malignant melanoma
is the most serious type of skin cancer. If caught in an early stage melanoma can often be treated, but if it left untreated it can spread to other parts of the body and become fatal.
Squamous cell cance
r looks like a rough, scaly patches it may be an open wound that does not heal. If left untreated it can spread rapidly to the lymphatic system and the bloodstream.
It is essential that the
skin and eyes are protected from excessive UV exposure.
UV radiation is electromagnetic energy

UVA 400-315 nm

UVB 315-280 nm

UVC 280-100 nm
Photochemical Reactors
Normally mercury vapor lamps are used, these lambs are broadband emitters and can excite more than just the desired chromophore. The wave length that is used 253.7nm.

Nd:YAg and Dye LASERS can be used too.

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