John Day Dam - Underwater video inspection
- Army Corps of Engineers, Portland, OR (United States)
An underwater video inspection device has recently been designed and built for use at John Day Powerhouse on the Columbia River. It is used to inspect for damage on the submerged traveling screens, vertical barrier screens and orifices which are used to guide juvenile fish away from the turbines. The Corps of Engineers is legally required to inspect this equipment once per month. It is possible but time consuming to perform the inspections on submerged traveling screens by removing them. The removal of screens requires a six person crew and gantry crane. The time to remove and install a screen is about 3 hours. A typical plant such as John Day has 48 screens. On most power plants, it is not practical to remove the vertical barrier screens because it is so time consuming. These were formerly inspected by shutting down the generating units and using a camera on a tether to inspect. The new inspection device uses minimal crew and doesn`t require shutting down generating units. This system is intended to be a prototype and it is expected that some improvements to the system will be developed as the system is used.
- OSTI ID:
- 220145
- Report Number(s):
- CONF-9507190-; TRN: 96:000708-0227
- Resource Relation:
- Conference: Waterpower 1995: international conference, San Francisco, CA (United States), 25-28 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Waterpower`95. Volume 1-3; Cassidy, J.L. [ed.]; PB: 2869 p.
- Country of Publication:
- United States
- Language:
- English
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