In 2025, Millstone Power Station faced a persistent dose rate challenge at a 45° elbow hot spot, where dose rates exceeded 20 Rem/hr. The existing temporary solution—shielding blankets wrapped around the pipe—was both visually unappealing and insufficient attenuation. Positioned overhead, the source posed unnecessary exposure to personnel working in the area. To address the issue, […]
BEFORE AFTER Oconee Nuclear Station contacted NPO to develop a permanent shielding solution for the Supplemental Spent Fuel Cooling Heat Exchanger. The heat exchanger is located inside the truck bay with one side exposed to the main truck bay door at the Radiologically Controlled Area (RCA) boundary. The ALARA planners at Oconee wanted a permanent […]
As part of a long-term dose reduction plan, Ameren Callaway sought to install permanent shielding around one of their regen heat exchangers. The intention was to replace the dozens of lead wool blankets used as temporary shielding, and more importantly, eliminate the time and dose costs associated with installing and uninstalling the temporary shielding package. Working […]