CRD Inspection Tooling and B2171 Scrape Campaign

Abstract

Since 2005, ongoing inspections and analyses of the Bruce B Unit 7 Calandria Relief Ducts (CRDs) have been required to characterize and monitor the chloride-induced transgranular stress corrosion cracking (TGSCC) [1].

In the 2021 planned inspection campaign and volumetric inspections, material samples were acquired to characterize the degradation further to support long-term fitness for service (FFS) and long-term repair of the components. The existing specialized robotic system developed for Bruce Power by Kinectrics was utilized as the common delivery platform for the volumetric inspections and acquisition of material samples within the CRDs.

This paper will present the specific and new technological advances made to the existing CRD NDE Inspection Tooling System to acquire these critical irradiated material samples to support Bruce Power's ongoing management of the Unit 7 CRDs.