Upgrading of HP turbines for nuclear power stations

Conference · Thu Dec 31 04:00:00 EST 1998

OSTI ID:318974

Marlow, B A; Brown, R D ^[1]

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1. GEC Alsthom, Power Generation, Rugby (United Kingdom)

Many papers have been written on the upgrading of nuclear plant LP turbines but there are also strong reasons for the upgrading of the HP turbines. Two principal reasons are discussed in this paper. Fouling by deposition on the feedwater side of the stream generator tubes, frequently results in a reduction of pressure at the turbine stop valve and a consequent loss of power output. This loss of power can be largely offset by fitting increased capacity blading in part of the HP turbine which increases the swallowing capacity of the turbine. It is necessary to consider the increased capacity blading, bypassing of heaters and future fouling to arrive at an optimum solution. Since the design of the operating nuclear stations GEC ALSTHOM have made very significant advances in the design of steam turbine HP blading and it is now possible to upgrade the HP turbine with blades of modern design to give a substantial increase in power output. The pay back period for such a upgrade is short and the paper describes some of the Company`s successful nuclear HP upgrading in the UK. The two actions described above can be combined, or indeed, be carried out in conjunction with an LP upgrade.

• OSTI ID: 318974
• Report Number(s): CONF-980426--
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AUGMENTATION
CAPACITY
DEPOSITS
FOULING
NUCLEAR POWER PLANTS
POWER GENERATION
STEAM TURBINES
THERMAL EFFICIENCY