Challenges

As part of the MCR program, the carbon steel feeder tubing and the specialized nuclear fuel channel assemblies of the primary heat transport (PHT) system must be replaced.

A portion of the feeder program work was required to take place in parallel with the detube /retube (DT/RT) work occurring below in the vault. As a result, temporary work platforms must be designed above the reactor face to facilitate the feeder replacement work.

Solutions

• Hatch assisted the client by providing detailed design of the upper feeder templates and template support structure.
• Prepared design planning documents like DP, PEP, PQP, etc.
• Accepted design deliverables from the subcontractor (Winsafe Corp.) for the Upper Feeder Platform.

Highlights

Design of temporary work platforms allowed work feeder program work and detube/retube work to take place in parallel, a requirement needed to meet the overall project schedule.

Hatch completed the role of ADE in accordance with the Engineering Change Control (ECC) process (BP-PROC-00539/00542).