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Extra resources for Fires in Nuclear Powerplants - Lessons Learned (IAEA TECDOC-1421)

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75 kW of station service transformer 22T. New fireplaces were quickly liquidated by the timely actions of the ANPP personnel and fire brigade. The generators breakers were switched off on the switchgear-110 and 220 kW. The autotransformer 110-220 kW and all lines 220kW were disconnected due to the short circuit on TG-2 and switching of TG-1 to the grid. The second service transformer switched off and the plant was a total blackout. During the fires at the NPP the compartments, including the Main Control Room and the Central Control Room were in smoke.

13 ‰ 06 Testing or maintenance was being performed Go to No. 14 ‰ 07 Decommissioning Go to No. 14 802 On power: Choose the status and go to No. 803 Hot shutdown: Choose the status and go to No. 14 ‰ 01 Hot standby (coolant at normal operating temperature) ‰ 02 Hot shutdown (coolant below normal operating temperature) 11. 804 Cold shutdown: Choose the status ‰ 01 Cold shutdown with closed reactor vessel Go to No. 14 ‰ 02 Refuelling or open vessel (for maintenance) Go to No. 12 ‰ 03 Mid-loop operation (PWR) Go to No.

The fire was not safety significant. A fire of polymeric material caused by a heater falling down inside the nuclear auxiliary building (PWR, 1979) During preparative work for maintenance and repair a heater had been provisionally installed to dry the concrete. The falling heater caused the overheating of plastic material in the close vicinity, particularly of a pipeline under the building sump. A smouldering fire occurred at the pipeline which was detected manually by personnel and extinguished within minutes by first aid shift fire fighters by means of powder extinguishers.

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Fires in Nuclear Powerplants - Lessons Learned (IAEA TECDOC-1421)

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