Implementation of Fire Prevention
Taking into consideration the significance of objectives related to creating the conditions for safe operation of reactor installations at Units 1 and 2, KhNPP management focus continuous attention on maintaining appropriate fire safety level and make maximum efforts to carry out all fire safety measures proposed in the prescriptions issued by the State Fire Safety Authority. KhNPP management and heads of departments place continuous emphasis on fire safety issues. Fire safety issues are discussed during the monthly meetings of fire protection committee and weekly technical meetings held by the Chief Engineer.
Investment schedules have been developed for fire prevention measures, which KhNPP is responsible for. More than 111 million hryvnyas (UAH) was spent for fire prevention measures from 2000 to 2015. 6787066 UAH were allocated for fire safety issues in 2016.
On June 24, 2016, State Emergency Service of Ukraine conducted detailed survey of fire and technical condition at Khmelnitsky NPP facilities, and issued an order.
In order to implement the Prescription, the plant-level measures have been developed with established and approved dates of implementation.
53 items have been planned. 14 items out of those 53 have been implemented. The remaining items are under implementation, and the deadline for their implementation has not expired yet.
It’s worthwhile noting the high fire protection level of KhNPP facilities, which is currently maintained at Khmelnitsky-1 and 2.
The following plant rooms are equipped with automatic fire alarm:
- All production rooms of the reactor building, safety system rooms, non-safety system rooms, corridors and staircases;
- Rooms of turbine halls, electrical cabinet rooms, backup diesel generator stations, pumping stations;
- Rooms of auxiliary systems of open switchyard 750/330 kV;
- Rooms of administrative building, laboratory building, plant-wide auxiliary structure, plant-wide gas facility, mazut, oil and diesel facility, start-up boiler, special auxiliary building;
- Rooms of all off-site KhNPP subdivisions, administrative building and warehouses of Logistics Department, Transportation Department, Training Centre, Repair and Construction Unit, off-site guard forces, Administration of Capital Construction, etc.
The following rooms are protected by automatic fire suppression systems:
- All cable rooms of reactor building in reactor auxiliary building and containment (water);
- Oil system rooms in reactor auxiliary building and containment (water);
- Oil-filled equipment of turbine halls (water);
- Oil system and fuel rooms of back-up diesel generator stations and pumping stations (water);
- Unit and standby transformers, house load transformers, reactors at open switchyard 750/330 kV (water);
- Cable rooms, floors, semi-floors and channels in electrical cabinet rooms, laboratory building, plant-wide auxiliary structure, open switchyard 750/330 kV, special auxiliary building (water);
- Rooms of mazut and oil pumps at mazut, oil and diesel facility (foam);
- Storage cells in solid radwaste storage (gas).
13 first-priority rooms at Unit 1 and 16 first-priority rooms at Unit 2 containing electrical and electronic equipment are equipped with automatic gas fire suppression systems, which are in commercial operation. The other rooms with electrical and electronic equipment of Units 1 and 2 are protected with manual gas fire suppression equipment of 2BR2MA or OU-80 type.
The rooms of safety system trains at the reactor building are equipped with fire doors with fire resistance rating of 1,5 hours. The air ducts in these rooms are equipped with fire valves with fire resistance rating of 1,5 hours.
Staircases in the reactor building are provided with forced air system to prevent evacuation routes from accumulation of smoke in case of fire.
Cables and cable structures in all KhNPP production buildings and structures are covered with fire-proof materials in order to improve their fire resistance and to make them fire retardant, in case the amount of polymeric materials exceeds 7 litres per running metre, and also in the places where different safety system cables cross each other, are in close proximity to each other, or go in parallel.
The whole length of cable routing is divided with fire-resistant belts every 20 metres in height and every 30 metres in length.
Noncombustible oil OMTI that does not spread burning by jet is used in turbine lubrication and turbine control systems at Turbine Halls 1 and 2.
Metal bearing structures of Turbine Halls 1 and 2 are covered with flame-retardant coat in order to improve their fire resistance so that it would meet the requirements. Besides, in order to cool the columns, frameworks, and roofs of turbine halls, the stationary fire-hose barrels are installed at the elevations 15.00 inside the turbine halls (12 pcs), on the roofs of deaerator compartments (4 pcs), and on the roofs of reactor auxiliary buildings (2 pcs), to which water is supplied both from indoor fire water supply and from fire-fighting vehicles.
In compliance with norms and regulations all production and administrative buildings, structures, and rooms of KhNPP are equipped with emergency and evacuation lighting, indoor fire water supply with hydrants, annunciation system in case of fire, fire safety placards and signs, evacuation routes, and memos based on plant-level instruction on fire safety. All plant departments are equipped with fire extinguishers according to the requirements. The station for maintenance and charging of fire extinguishers is located at KhNPP site. Its personnel have the relevant license that allows them to charge all kinds of fire extinguishers.
KhNPP site is equipped with outdoor circular high-pressure water main with 74 hydrants and backup fire pumps at pumping stations 1 and 2.
The buildings and structures of reactor buildings, turbine halls, electrical equipment cabinet rooms, special auxiliary building, and auxiliary structures are equipped with outside emergency stairs, and the stairs provided at the height differences make it possible for fire fighting staff to climb the roof and to lift fire fighting equipment and agents.
All KhNPP personnel are provided with training, briefings and take examinations on fire safety issues.
Fire exercises are conducted according to the schedules, including joint fire exercises with the 7 State Fire Brigade.
Shift operating personnel of the departments are equipped with breathing apparatus (ASV-2) and Drager fire-fighting suits.
Fire prevention technical committee has been organized by KhNPP Order. The committee includes plant managers, heads of main departments, and representatives of the 7th State Fire Brigade. The committee is held minimum once a quarter. All issues related to ensuring KhNPP fire safety are reviewed during the committee meetings.
All above-mentioned and other activities help to maintain high level of fire safety at KhNPP facilities.