This past spring outage season, NPO collaborated with a plant to provide them with custom shielding for their Conoseals during Core Exit Thermocouple replacement activities. Unit 1 and Unit 2 had different Conoseal structures, and the challenge was to model a shielding package that could be used for both elements interchangeably. The shielding package was designed, engineered and manufactured within 9 weeks of the very first customer communication. The outcome was a ~90% dose reduction on contact, (Co-60).
Additionally, NPO supplied a modified storage container that the shielding was stored in, crane lifted into the reactor cavity during the activities, and will ease transporting it from Unit 1 to Unit 2 as needed.
Please contact NPO for additional details regarding this very interesting, effective application!