ЦНСА, ЦНР, ЦНА
Low Pressure Emergency Core Cooling System (ECCS) Pumps:
Horizontal, centerline-supported, between-bearings, single-stage axially split volute casing centrifugal, with a double entry radial impeller, plain bearings and shaft sealing by means of mechanical seals.
Unified with respect to each other and differ only in the impeller diameter.
Additional and technical information
| Pump make | Equipment applications | Technical data | Safety class / Seismic stability category / Climatic version | ||
| Capacity, m3/h | Head, m | Type of drive & its parameters | |||
| ЦНР 800-230-1 | Used as a residual heat removal (RHR) pump for injection of boric acid solution into the reactor coolant circuit with the purpose of essential cooling service of the fuel core following a scheduled reactor shutdown and emergency cooldown in the event of failure. | 800 | 230 | Electric motor n = 3000 rpm P nom. = 800 kW U = 6000 V | 2/УХЛ4 |
| ЦНСА 700-140-1 | Used as a sprinkler system supply pump (containment spray pump) taking suction from the emergency boron storage tank to supply boric acid solution for spray nozzles of a sprinkler system to cool the air space of the safety shell (containment) in case of a significant malfunction. | 700 | 140 | Electric motor n = 3000 rpm P nom. = 500 kW U = 6000 V | 2/УХЛ4 |
Residual Heat Removal Pumps
Horizontal centreline mounted, inducer multistage, barrel-casing centrifugal, with a withdrawable cartridge of ring-section type, plain bearings and shaft sealing by means of mechanical seals.
Additional and technical information
| Pump make | Equipment applications | Technical data | Safety class / Seismic stability category / Climatic version | ||
| Capacity, m3/h | Head, m | Type of drive & its parameters | |||
| ЦНСА 750-140 | Designed for injection of boric acid solution into the reactor coolant circuit during predictable emergency operations, at which the safety injection system is to be automatically actuated, and to cool down the fuel core following a scheduled reactor shutdown. | 750 | 140 | Electric motor n = 1500 rpm P nom. = 500 kW U = 6000 V | 2/I/М4 |
| ЦНСА 750-140-1 | 2/I/ТВ4 | ||||
| ЦНСА 750-140-2 | 2/I/М4 | ||||
| ЦНСА 750-140а | Designed for injection of boric acid solution into the reactor coolant circuit during predictable emergency operations, at which the safety injection system is to be automatically actuated, and to cool down the fuel core following a scheduled reactor shutdown. | 800 | 150 | Electric motor n = 1500 rpm P nom. = 630 kW U = 6000 V | 2/I/М4 |
| ЦНСА 750-140а-1 | 2/I/М4 | ||||
| ЦНСА 750-140а-2 | Electric motor n = 1500 rpm P nom. = 630 kW U = 10000 V | 2/I/ТВ4 | |||
| ЦНСА 750-140а-3 | 2/I/УХЛ4 | ||||
| ЦНСА 750-140а-4 | Electric motor n = 1500 rpm P nom. = 630 kW U = 6000 V | 2/I/М4 | |||
ЦНА High Pressure Emergency Core Cooling System (ECCS) Pumps
Horizontal centreline mounted, multistage, barrel-casing centrifugal, with a withdrawable cartridge of ring-section type, plain bearings and shaft sealing by means of mechanical seals.
Additional and technical information
| Pump make | Equipment applications | Technical data | Safety class / Seismic stability category / Climatic version | ||
| Capacity, m3/h | Head, m | Type of drive & its parameters | |||
| ЦНА 150-60 | Used as a charging pump for injection of boric acid solution into the reactor coolant system (primary circuit) during a failure at the NPS units equipped with VVER-91 pressurized water reactor | 150 | 650 | Electric motor n = 2973 rpm P nom. = 630 kW U = 6000 V | 2З/I/М4 |
| ЦН 150-60-1 | Designed for injection of boric acid solution into the reactor coolant system:
– to replenish liquid losses in the primary circuit (as a volume control pump) and to remove the fission product decay heat from the reactor core following a loss-of-coolant accident (as a result of rupture of small pipes of up to 100 mm inclusive in diameter) as a charging pump; – to make up the reactor coolant circuit in the emergency situation associated with a loss-of-coolant accident (leakage through rupture of pipes of more than 100 mm in diameter) as a safety injection pump; – to maintain the reactor core in the subcritical condition (as a RHR pump) |
153 | 708 | Electric motor n = 2973 rpm P nom. = 630 kW U = 6000 V | 2/I/ТВ4 |
| ЦНА 150-60-2 | Designed for injection of boric acid solution into the primary circuit during predictable emergency operations, at which the safety injection system is to be automatically actuated | 150 | 650 | Electric motor n = 2979 rpm P nom. = 630 kW U = 10000 V | 2/I/УХЛ4 |
| ЦНА 150-60-3 | Designed for injection of boric acid solution into the primary circuit during predictable emergency operations, at which the safety injection system is to be automatically actuated | 150 | 650 | Electric motor n = 3000 rpm P nom. = 630 kW U = 10000 V | 2/I/УХЛ4 |
| ЦНА 150-60-4 | Designed for injection of boric acid solution into the primary circuit during predictable emergency operations, at which the safety injection system is to be automatically actuated | 150 | 650 | Electric motor n = 3000 rpm P nom. = 630 kW U = 6000 V | 2/I/М4 |
| ЦНА 150-110-2 | Designed for injection of boric acid solution from the emergency storage tank into the primary circuit of the NPS power units equipped with VVER-1000 PWR during cooldown of the reactor coolant system following a failure | 150 | 980 | Electric motor n = 3000 rpm P nom. = 800 kW U = 6000 V | 2/I/УХЛ4 |
ЦНА Pumps fot Support Auxiliary Systems
Pumps for Support Auxiliary Systems
Horizontal, foot-mounted, between-bearings, single-stage, axially split volute casing centrifugal, with a double entry radial impeller, antifriction bearings and shaft sealing by means of mechanical seals.
Additional and technical information
| Pump make | Equipment applications | Technical data | Safety class / Seismic stability category / Climatic version | ||
| Capacity, m3/h | Head, m | Type of drive & its parameters | |||
| ЦНА 1400-12 | Used to boost cooling water pressure at the inlet of the generator gas coolers | 1400 | 12 | Electric motor n = 750 rpm P nom. = 75 kW U = 380 V | 4/IIб/ТВ4 |
| ЦНА 1700-35 | Designed for handling demineralized water in the intermediate loop | 1700 | 35 | Electric motor n = 1500 rpm P nom. = 250 kW U = 6000 V | 2/I/M4 |
| ЦНА 2000-40 | Designed for handling demineralized water in the intermediate loop | 2000 | 40 | Electric motor n = 1500 rpm P nom. = 330 kW U = 6000 V | 2/I/M4 |
| ЦНА 4000-95/8 | Used as a component cooling water pump for circulation of clean water through essential components to provide the requirements of critical using equipment / services in cooling water under all the operating conditions of the power unit, including emergency situation | 3600 | 55 | Electric motor n = 750 rpm P nom. = 630 kW U = 6000 V | 2/I/УХЛ4 |
| ЦНА 1400-12 | 3/I/УХЛ4 | ||||
