Gaseous radwaste system backfit design for the Surry nuclear station

The two-unit pressurized water reactor Surry station, which began operation in 1972, included a pressurized tank gaseous radwaste system as part of its original design. This system, however, has had many operational problems; to alleviate these problems a replacement system employing an ambient temperature charcoal delay system has been designed. This design demonstrates the feasibility of installing and starting up a charcoal delay system in an operation nuclear power station while making extensive use of the existing tanks, valves, and piping