Images de page
PDF
ePub
[graphic][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][subsumed][ocr errors][subsumed][subsumed][subsumed][subsumed][subsumed]
[blocks in formation]

CHERNOBYL PLANT CHARACTERISTICS

=

THE CHERNOBYL UNITS (RUSSIAN NAME RBMK-1000) ARE DIRECT

CYCLE BOILING-WATER PRESSURE-TUBE REACTORS

EACH UNIT IS RATED AT ABOUT 3200 MWT

THE REACTOR FUEL IS CONTAINED IN A LARGE NUMBER (1660) OF
INDIVIDUAL ZIRCALOY PRESSURE TUBES IMBEDDED IN A MATRIX OF
GRAPHITE BLOCKS.

EACH PRESSURE TUBE CONTAINS 18 ZIRCALOY CLAD UO FUEL PINS
ENRICHED TO ABOUT 1.8% U-235. THE PRESSURE TUBES ARE
8.8 CM (3.5 INCH) IN DIAMETER.

THE REACTOR IS ABOUT 12M ( 40 FT) IN DIAMETER AND 8M ( 26FT)
HIGH INCLUDING SIDE AND TOP GRAPHITE REFLECTORS

THE GRAPHITE MATRIX IS ENCLOSED WITHIN AN INERTED ATMOSHPERE

SIX OPERATING PUMPS (8 PUMPS TOTAL, TWO PUMPS ARE ON STANDBY) CIRCULATE COOLING WATER TO THE INLET OF FACH INDIVIDUAL PRESSURE TUBE (FUEL ASSEMBLY) THROUGH INDIVIDUAL LINES FOR EACH ASSEMBLY

STEAM IS PRODUCED WITHIN THE ASSEMBLY AND IS EXTRACTED FROM THE TOP OF EACH PRESSURE TUBE AND COLLECTED IN A HEADER COMMON TO ONE OF FOUR STEAM DRUMS

CONTROL IS ACCOMPLISHED WITH 211 BORON CARBIDE CONTROL RODS

THE CONTROL ROD CHANNELS ARE COOLED SEPARATELY

ON LINE REFUELING (ESSENTIALLY CONTINUOUS)

EMERGENCY COOLING SYSTEMS ARE DESIGNED FOR MAIN COOLANT PIPE

BREAK

ECCS SYSTEMS INCLUDE

PASSIVE INJECTION TANKS

LOW PRESSURE PUMPED INJECTION (ON DIESELS)

HIGH PRESSURE PUMPED INJECTION (ON DIESELS)

« PrécédentContinuer »