Thermotechnology in nuclear power plants: problem areas in construction of present day large turbine sets

Journal Article · Thu Oct 18 04:00:00 EDT 1973 · Tek. Ukebl., v. 1200, no. 43, pp. 47-52

OSTI ID:4353498

Aulie, N J

In nuclear power plants using PWR or BWR type reactors the low steam conditions lead to the use of physically much larger turbine sets than in conventional base load plants. Superheating cannot be used and the steam is nearly always wet. The large steam volumes for a given power output necessitate very large turbine blades at the LP exit and this is the limiting factor in design. The condenser vacuum plays an important role in the design optimization. The water separator/reheater is an important component as are the feedwater heaters in the thermal economy of the steam cycle. The feedwater pumps do not require the same effect as in a conventional plant, due to the lower pressure. Both turbine and electric pumps may be used. The dimensions of the generator are limited by dynamic stresses and transport problems. Higher magnet effects attained in rotors can lead to vibrations and deformations. Hydrogen cooling of the rotor windings and water cooling of the stator windings are at present used, but full water cooling may allow a 20% reduction in size. 4-pole machines do not offer new problems and the rotors are in many ways technically simpler. However, the stator weight of a 1300 MW stator can be 400 tons and transport problems arise. (NO)

• Research Organization: A.S. Norsk Elektrisk and Brown Boveri, Oslo
• NSA Number: NSA-29-020017
• OSTI ID: 4353498
• Journal Information: Tek. Ukebl., v. 1200, no. 43, pp. 47-52, Journal Name: Tek. Ukebl., v. 1200, no. 43, pp. 47-52; ISSN TUGEA
• Country of Publication: Norway
• Language: Norwegian

Related Subjects

*BWR TYPE REACTORS-- TURBOGENERATORS
*PWR TYPE REACTORS-- TURBOGENERATORS
*STEAM TURBINES-- PERFORMANCE
*TURBOGENERATORS-- PERFORMANCE
FEEDWATER HEATERS
MOLLIER DIAGRAMS
N77100* --Reactors--Power Reactors
Non-breeding
Light- water Moderated
Boiling Water-cooled
N77200 --Reactors--Power Reactors
Non-breeding
Light-water Moderated
Non-boiling Water-cooled
NUCLEAR POWER PLANTS
OPTIMIZATION
STEAM QUALITY