Operating problems with startup valves in US and Japanese supercritical steam generators: Topical report

Technical Report · Sat Jul 01 04:00:00 EDT 1989

OSTI ID:5917799

Fitzgerald, F D; Tsao, D; Saito, T

The evolution of the boiler start-up systems for once-through units (OTUs) in the United States is outlined. The service requirements for the control valves of a generic flash tank-based start-up system are described. ''Control-Valve Problem Questionnaires'' were prepared and distributed to operators of OTUs in the United States of America and Japan. The results from the questionnaires are presented for the superheater bypass, furnace outlet throttling, and turbine bypass control valves. The minutes of interviews with two US boiler manufacturers and four utility operators of OTUs are presented. The topic of discussion was OTU control valve problems and solutions. A summary of control valve problems at OTUs in Japan is presented. A distinction is made between base-loaded OTUs and the new cycling OTUs. Factors influencing the decision to replace original control valves with modern valves are summarized. 8 refs., 19 figs., 12 tabs.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (USA). Generation and Storage Div.; Foster Wheeler Energy Corp., Livingston, NJ (USA); Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan); Bailey Japan Co. Ltd., Shizuoka (Japan)
• OSTI ID: 5917799
• Report Number(s): EPRI-GS-6397
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200104* -- Fossil-Fueled Power Plants-- Components
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ACTUATORS
ASIA
BOILERS
CAVITATION
CONTROL EQUIPMENT
CONTROL SYSTEMS
EQUIPMENT
EROSION
FAILURES
FLOW REGULATORS
FOSSIL-FUEL POWER PLANTS
JAPAN
POWER PLANTS
START-UP
STEAM GENERATORS
THERMAL CYCLING
THERMAL POWER PLANTS
VALVES
VAPOR GENERATORS