Since 2005, in our country, the use of UV germicidal radiation for disinfection of the indoor air environment is regulated by the guidance of R3.5.1904–64 (as the recommendations). This radiation is dangerous for humans: skin and especially the eyes are affected. It is necessary to use closed irradiators (recirculators) with germicidal lamps, and not open ones, the radiation of which covers the entire volume of the room in order to avoid exposure of people during disinfection of indoor air. This requires taking people from the premises and observing all relevant safety measures.
Unfortunately, in practice, there may occur, accidentally or out of ignorance of the rules for open irradiators operating by personnel, violations of safety rules leading to grave consequences. To eliminate such violations, it is necessary to increase the level of knowledge of staff, but there is no special educational and technical literature. This article attempts to fill this gap. 1. Neustadt YA.E. Germicidal UV radiation. M .: Medgiz, 1956, 120 p.
2. Kostyuchenko S.V., Krasnochub A.B., Kudryavtsev N.N. A new generation of germicidal irradiators for disinfecting air and water based on highly efficient amalgam lamps // Svetotekhnika, 2004, # 4, pp. 15–19.
3. Vasiliev A.I., Krasnochub A.B., Kuzmenko M.E., Petrenko Yu, Pecherkin A.Y. Analysis of modern industrial sources of germicidal UV radiation // Svetotekhnika, 2004, # 6, pp. 42–45.
4. Ultraviolet technology in the modern world: a collective monograph, ed. F.V. Karmazinova et al. Dolgoprudny: Intellect Publishing House, 2012, 392 p.
5. Wasserman A.L. Shandala M.G., Yuzbashev V.G. UV radiation in the prevention of infectious diseases. Moscow: Medicine, 2003, 204 p.
6. Wasserman A.L. Yuzbashev V.G. A mathematical model for calculating the productivity of UV germicidal recirculator // Svetotekhnika, 2015, # 6, pp. 38–39.
7. Artsimovich LA. Elementary plasma physics/ Moscow: Gosatomizdat, 1963, 98 p.
8. Rokhlin G.N. Gas discharge light sources/ MoscowLeningrad: Energy, 1966, 560 p.
9. Wasserman A.L. Measurement of the germicidal flux of UV mercury lamps of low pressure // Svetotekhnika, 2019, # 1, pp. 69–72.
10. Reference book on lighting. 4th ed., Rev. and add. / Under the total. ed. Yu.B. Eisenberg and G.V. Boos. Mjscow: 2019, 892 p.

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• UV germicidal radiation
• spectrum of activity
• germicidal effectiveness
• productivity of a germicidal irradiator
• surface or volume emitter
• volumetric dose