Decree No. 125 / 1982 Coll.
Order of the Czech Labour Safety Authority laying down requirements for safety at work with lasers
Valid
Effective from 01.01.1983
125
DECLARATION
Czech Labour Safety Authority
of 17 February 1982
laying down requirements for safety at work with lasers
According to § 5 (1) (d) of Act No. 174 / 1968 Coll., on State Professional Safety Supervision, in agreement with the competent authorities and organisations
Scope
(1) The Decree applies to organisations which design, manufacture, operate, maintain and repair lasers and equipment in which the laser is incorporated as a source of radiation.
(2) The Decree does not apply to the use of lasers at workplaces and to activities subject to special supervision by State Mining Administration (1)
(1) Laser means a quantum generator of electromagnetic radiation whose wavelength is between 200- 13,000 nm.
(2) The maximum permissible value means the value of the power (energy) emitted by the laser radiation that is specified by the specific Regulation (2).
Obligations of laser designers
(1) Lasers shall be designed in such a way that spontaneous radiation cannot occur without operator intervention. The illumination shall be based only on the output aperture of the beam, which shall be marked significantly.
(2) Lasers shall be equipped with a light and, where appropriate, audible operating signal to be activated when the power supply is switched on. The light-signalling device shall be reliably identifiable even when using protective glasses.
(3) All laser observation holes shall be equipped with light filters that weaken the radiation intensity to the permissible values.
(4) The electric part of the laser shall comply with the relevant technical standard. 3)
(5) Lasers equipped with forced cooling must be designed so that they are automatically switched off when the cooling fails.
(6) High pressure discharge lamps and tubes must be equipped with reliable housing in case of explosion.
(7) Fully covered lasers shall be equipped with such that each part of the protective cover has a safety lock.
(8) Radiation-emitting lasers capable of causing accidental injury must be equipped with a lockable master control. The key must be removable.
Obligations of the manufacturer
(1) The manufacturer is obliged to supply technical documentation and operator instructions to the laser.
(2) The technical documentation shall include:
(a) wavelength or wavelength range;
(b) laser power (in the case of impulse lasers, energy, duration, or pulse frequency),
(c) classification of the laser in accordance with specific regulations;
(d) the manufacturer's mark, the production number and the year of manufacture;
(e) instructions for correct installation and installation, including construction and spatial requirements;
(f) the maintenance requirements and the determination of the extent of the repairs which only the manufacturer or his authorised organisation may carry out;
(g) other particulars provided for in specific provisions.
(3) The operator manual must contain, in addition to the description of the laser operator himself
(a) warnings of the risks associated with the use and tampering of lasers;
(b) specific requirements for the fitting of personnel with personal protective equipment for individual laser classes.
Operators' obligations
An organisation operating lasers (hereinafter referred to as "operator ') shall:
(a) define (reserve) the space in which the laser is used;
(b) develop operational rules for the work of lasers and post them in an accessible and visible place at the workplace; the operating rules shall include the requirements of safety and hygiene regulations and the manufacturer's (supplier's) instructions for the installation, operation, maintenance, operation, repair, repair and inspection of lasers;
(c) identify in writing the personnel responsible for the operation, operation, repair and maintenance of lasers;
(d) train and at least acquaint the staff designated for the operation, maintenance and repair of lasers
1. with the principles of operation, properties of lasers and the danger associated with laser activity,
2. with an operating order for working with lasers,
3. with the procedure for hitting the worker with large doses of radiation and with the procedure for working in an operating accident (accident) or laser failure,
(e) ensure the proper keeping of the log of malfunctions, repairs and maintenance of the laser stored at the workplace.
Laser operation
(1) Lasers must be protected against tampering by unauthorised persons. The laser can only be activated on the instruction of the worker responsible for their operation (§ 5), who is previously required to check that there is no danger to the environment in the space in which the lasers are used in the operation of the laser, or objects that could be a source of danger to the environment if the laser beam is hit.
(2) Lasers can only be operated by personnel who have been trained for this activity (§ 5 (d)) and are medical.4)
(3) Specific rules apply to the operation and work of electrical parts. 5)
(4) In the operation of lasers capable of transmitting radiation exceeding the maximum permissible value, measures to prevent workers from being exposed (e.g. remote control, covering the beam path, preventing persons from entering the beam path by means of mechanical barriers, etc.) shall be used.
(5) Where technical and technological measures cannot prevent the maximum permitted exposure being exceeded, workers located in a defined area shall use the required personal protective equipment.
(6) Microscopes, telescopes and other optical systems used to observe a direct or reflected laser beam must be adjusted so that exposure to the eye does not exceed the maximum permitted exposure value. The optical attachments shall indicate the data from which the change in laser radiation intensity may be determined when used.
(7) The optical laser systems can only be set in such a way as to exclude exposure to the eye above the maximum permissible value.
Workplace
(1) The work site must be secured against the entry of unauthorised persons (for example, by mechanical barrier, security locking) and marked with a ban on entry with warning of dangerous radiation. 6)
(2) The rooms in which the laser is located must be adapted so as to avoid uncontrolled hazardous reflections or penetration of laser radiation (for example by painting the walls with matte coating with a small reflector).
(3) When using lasers outside closed spaces, the beam shall be conducted in such a way that non-target objects are not affected.
(4) In the space where lasers are used, substances from which harmful gases or explosive mixtures of gases may be produced may not be stored.
(5) If liquefied gases are used to cool lasers, or if harmful substances can be produced in the workplace due to radiation, the workplace shall be equipped with an efficient ventilation system.
(6) The path of laser beams capable of producing radiation above the maximum permissible value shall be bounded by an effective barrier at the end.
Repair and maintenance services of lasers
(1) Repair and maintenance of lasers may be carried out only with the consent of the worker responsible for operating the lasers.
(2) Major-scale repairs may be carried out only by the laser manufacturer or by his authorised organisation [Paragraph 4 (2) (f)].
(3) After repair, which may have affected the characteristic characteristics of a potentially hazardous laser, the organisation that has performed the repair shall, in the presence of the worker responsible for the operation of the laser, carry out a laser and workstation check in respect of direct, reflected or diffuse radiation and ensure possible changes in safety measures.
(4) Repair and maintenance of lasers likely to endanger the health of persons can only be performed when the laser is switched off and so secured so that it cannot be activated by random switching. In such a repair, the laser can only be activated for the time strictly necessary to measure the characteristic values.
(5) Workers repairing lasers must be trained to repair lasers [§ 5 (d)] and medical.4)
Transitional and final provisions
(1) The provisions of this Decree shall apply to the construction of lasers from the date of its entry into force.
(2) Lasers which do not comply with the provisions of this Decree must be modified by the operator no later than one year after the date of its entry into force.
This decree takes effect on 1 January 1983.
Chairman:
Dr Bartek v. r.
1) Act No. 41 / 1957 Coll., on the Use of Mineral Wealth (upper law). Act of the Czech National Council No. 24 / 1972 Coll., on the organisation and extension of supervision of the State Mining Administration.
2) Directive No. 61 / 1981 Coll.
3) ČSN 34 1630 Electrical equipment of working machinery. ČSN 34 1631 Regulations for electronic equipment for working machinery. ČSN 35 6501 Electronic measuring instruments. Security provisions.
4) Directive No 49 / 1967 of the Ministry of Health of the Ministry of Health on the assessment of medical fitness for work, as amended by the Ministry of Health of the Ministry of Health No 17 / 1970 of the Ministry of Health of the Ministry of Health of the Czech Republic (reg. 20 / 1970 Coll.).
5) ČSN 34 3100 Safety regulations for operating and working on electrical equipment.
6) ČSN 01 8010 Safety colours and marks. General provisions. ČSN 01 8012 Safety tables.
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Regulation Information
| Citation | Decree of the Czech Labour Safety Authority No. 125 / 1982 Coll., laying down requirements for safety at work with lasers |
|---|---|
| Regulation Type | - |
| Author | - |
| Collection | Code of Laws |
| Date of Promulgation | 11.11.1982 |
|---|---|
| Effective from | 01.01.1983 |
| Effective until | - |
| Status | Valid |
The regulation text is for informational purposes only.
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