An innovative, Jamko-designed solution to an NRC reactor vessel examination requirement, first tried during U2R11 at Palo Verde Nuclear Generating Station, proved to be very successful. So much so, that the development team is submited for a Nuclear Energy Institute Top Industry Practice Award.
In the past, plant engineers have resorted to cutting pipes and disassembling equipment to gain access to difficult to reach areas needed to evaluate the structural integrity and cleanliness of plant systems. This can be expensive, time consuming, and adversely impacts the plant’s ability to promptly return to normal operation.
A typical MSW landfill Leachate Collection System (LCS) consists of over 14,000 total linear feet of 4-10 inch diameter High Density Poly-Ethylene (HDPE) piping. Individual sections can vary anywhere from 200-1,000 feet in length and can empty into sumps located at depths up to 150 feet. In order to limit the amount of build-up or clogging through the calcification of leachate, it is recommended that every section of the LCS be cleaned and inspected on an annual basis.
The municipality solicited bids for the cleaning and remote visual inspection of specified sections of its sanitary system. The project required the mobilization of crews and equipment to perform work in various locations throughout the city. Project parameters detailed a 90 day time frame for completion, public notification procedures, and restricted hours of work.