Instructions on labor protection during demercurization measures

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Instructions on labor protection during demercurization measures

Occupational Safety and Health

Occupational Safety and Health / Standard instructions for labor protection

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Safe Operation

1. General requirements for labor protection

1.1. The general organization of work on mercury demercurization is assigned to the head of the workshop (section). The head of the site is obliged to organize training and briefing of workers involved in mercury demercurization.

1.2. Persons at least 18 years of age who have passed a medical commission (having no contraindications when working with mercury), trained and certified according to the safety rules when working with mercury are allowed to work on mercury demerculation.

1.3. Demerculation activities are carried out in accordance with the guidelines for monitoring the organization of current and final demerculation and assessing its effectiveness

1.4. Mercury is stored in special warehouses, equipped in accordance with the requirements for industrial premises, in the air of which mercury vapor can enter.

1.5. Warehouses should have a stock of devices for the safe transportation and release of mercury to the consumer.

1.6. Mercury can only be transported over unbreakable containers.

1.7. Storage of mercury in warehouses and under production conditions is carried out in steel cylinders with steel screw caps.

1.8. The issuance of mercury from warehouses is carried out only at the request of the head of the workshop or laboratory in an amount not exceeding the daily requirement.

1.9. Spent mercury must be stored in warehouses in conditions that exclude the possibility of air pollution.

1.10. Personnel must be provided with overalls in accordance with the norms of free distribution (underwear, dressing gown, scarf, slippers).

2. Labor protection requirements before starting work

2.1. Wear the appropriate clothing and safety shoes.

2.2 Take therapeutic and preventive nutrition.

2.3. Check the operation of the supply and exhaust ventilation.

2.4. Check the workplace so that there are no drops of mercury; if it is found, immediately collect it with a pear in a container with water.

3. Labor protection requirements during work

3.1. Mercury is stored in special warehouses, equipped in accordance with the requirements for industrial premises, in the air of which mercury vapor can enter.

3.2. Manipulations with open mercury should be carried out in PVC gloves, above the pallet, inside the fume hood, with ventilation working.

3.3. When working with metallic mercury, it is necessary to use thick-walled chemical-analytical utensils made of unbreakable glass.

3.4. Waste solutions containing mercury should be drained through a large-capacity china cup to prevent droplets of mercury from entering the sewer.

3.5 For the disposal of defective products and temporary storage of defective products freed from mercury, special premises associated with the main technology.

Area not less than 4 m2, volume not less than 15 m2 per worker.

3.6. Workers engaged in the destruction of defective products, equipment must be provided with overalls, safety shoes

3.7. If there is visible mercury or its compounds on the surface, a mechanical method is used. Initially, the visible mercury is collected using a vacuum or amalgamated copper plates. After removing the visible mercury, the surface is hydroblasted.

3.8. Chemical demercurization is carried out by treating equipment, cleaned of visible mercury, corrosion products and old anti-corrosion coatings, with solutions of oxidizing agents that easily oxidize mercury, but do not destroy structural materials.

The choice of demercurizing solutions is determined by the material from which the equipment is made.

3.9. The following chemical solutions are used for chemical demercurization:

calcium permanganate solution - 2-6 gr. per 1 liter plus 40-60 gr. sulfuric acid per 1 liter of water (a matchbox of calcium permanganate, plus 0,5 liters of sulfuric acid per bucket of water);
ferric chloride solution - 150-200 gr. for 1 liter of water;
calcium permanganate solution 2-6 gr. per 1 liter of water, plus nitric acid 65-75%.

3.10. Carrying out work on demercuration in case of detection of mercury in the residential sectors of settlements

3.10.1. The head of the living sector, the head of the organization where mercury was found, and the leadership of the city's civil defense should be informed about the detected mercury.

3.10.2. The place where mercury is found must be fenced off and people, especially children, should not be allowed to the place of the mercury spill.

3.10.3. Demercurization is carried out in the following order:

demercurization is carried out by a specialist who knows the technology of such work;
visible, spilled mercury is poured with a solution of calcium permanganate plus a 65-75% solution of nitric acid until it is completely oxidized;
then the spill site is covered with sawdust or sand, after that with an excavator;
a layer of earth is removed (200-400 mm) and loaded onto a car, the removed earth is transported to the landfill of JSC. "Thermopribor"

4. Labor protection requirements in emergency situations

4.1. Actions in case of detection of mercury in a residential building

4.1.1. Report to the head of the R.E.U.

4.1.2. It is forbidden to collect spilled mercury with a broom and a dustpan.

4.1.3. Spilled mercury should be collected and demercurized by a specialist who is well acquainted with these duties or employees of sanitary and epidemiological supervision.

4.1.4. After carrying out demercurization work, it is mandatory to take an analysis of the air environment for the content of mercury vapor.

5. Labor protection requirements at the end of work

5.1. Put in order the tools, fixtures, inventory.

5.2. Take off special clothes, special shoes and put them in the place designated for these purposes

5.3. Rinse your mouth with a weak solution of calcium permanganate, take a shower.

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