Magnox
Jan 2015 to Sep 2017, and Mar 2014 to Sep 2014
Sector:
Nuclear Decommissioning Handling Equipment.
(For use with radiological intermediate level wet waste – ILWW)
Sector:
Nuclear Decommissioning Handling Equipment.
(For use with radiological intermediate level wet waste – ILWW)
Overview:
Nuclear Decommissioning of Intermediate Level Waste at Dungeness and Bradwell using AutoDesk Inventor 3D for 3 projects.
1st: An Advanced Vacuum Drying Skid (AVDS) for removing moisture from radioactive waste containers.
2nd: A Resin Retrieval System using a pumping technology to fill waste containers, and,
3rd: A Wet Waste Transfer System using a vacuum technology to transfer between container types, and in 2014,
In 2014, worked to deliver the Process Definition & Plant Design for a £500k radioactive ‘Sludge Heel’ Retrieval system.
Plant room equipment, pipe and cable layouts for a wet waste resin retrieval system (including a steel balcony 20m high) for intermediate level wastes (ILW) as shown below
As part of the Wet Waste Transfer System, a ‘first of a kind’ purge trolly for Hydrogen removal from DCICs was needed as shown in the image below.
Worked with:
Stakeholder needs, nuclear site licensing and safety case constraints.
Sub-Contractor management, and Construction Design Management (CDM) regulations.
Using AutoDesk Inventor 3D CAD to BIM level 2 and BS 8888 for concept and detail design.
Contributed to authoring the functional specifications, and conducting risk assessments.
Adhering to regulations compliances such as CE-Marking, ATEX, PSSR / PED, and ASME B31.3 piping standards.
Ensuring ‘Double Containment’ as needed, and participating in ‘Optioneering’ within the safety case constraints.
Full details of this role:
BRADWELL:- Authored the Work Specification (WS) docs for 2 key AVDS safety elements to satisfy Nuclear, Radiological + Environmental Safety Case Compliances:
1/ The shutdown systems during fire hazards & ventilation system failures: and
2/ HEPA filter change-overs.
Hydrogen Purge Trolley layout design done in 3D on Autocad 2015, & created from just a process flow diagram specification to a point where all piece-parts were designed & procured (vacuum disk, brackets, seals etc), & document pack completed. This purge trolley was the ‘first of a kind’ for Magnox, & allowed the safe removal of hydrogen from wet waste containers prior to drying on the AVDS.
Authored a number of Trolley related documents including Operation + Maintenance Instructions, & build instructions for the sub-contractor.
Managed sub-contractor activities during manufacture of the first trolley, & also responsible for establishing what levels of regulatory compliances were required for this ‘first of a kind’ item – CE Marking / ATEX / PSSR / PUWER / etc. Trolley complied in Summer 2015 with Site Licensing & safety cases for handling / processing nuclear waste materials.
DUNGENESS:- 3D layout Design of the Dungeness (DNA) AVDS plant room & all piping + cabling using Inventor 2012 in accordance with Nuclear Site License & safety conditions. Pipe supports designed with plant Floor Load & strength calculations completed. Defined the level of pipe stress calculations required from the vendor (shown to be a minimal) for the DNA pipework based on the ASME B31.3 pipe standard.
Implemented both Autodesk Inventor 3D software & Autodesk 3D Design Review software at DNA for the AVDS project, thus enabling collaborative working with colleagues, vendors, & the Decommissioning Authorities.
The move to 3D methods gave benefits of improved project understanding across the work group, reduced installation & project completion timescales – & costs – by approx. 3 months, & £400k, as well as the ability to inherit 3D CAD data from vendors, thus taking the company toward BIM level 2 – the minimum requirement for work in the public sector such as nuclear de-commissioning.
Upon completion of AVDS work in Spring 2016, plant layout work began in 3D for the Dungeness Resin Retrieval equipment, based on a just a P&ID specification. The Resin Retrieval System consisted of a number of key elements as follows:-
An elaborate suction pump system with in-built sensors inherited from another site (Hinkley Point A – HPA)
A radiologically shielded 60 meter double contained hose route & associated pipe supports rated to carry 700Kg per meter,
A radiologically shielded batch tank & pumps assembly to establish accurate fill quantities for the waste container (a DCIC,)
A substantial frame structure (Sway Frame) to support approx 15 tonnes of shielded batch tank sub assembly,
The supernate return pump with in-built sensors from HPA & its 40 meter double contained shielded return hose, & finally
The control room layout & cable route trunking tray locations
Having established the overall 3D layout (using Inventor 2012) of the main system items & the initial 3D GA drawing for the items listed above, colleagues focused on the detail design of the batch tank assembly while I was responsible for delivering the detail design, manufacturing drawings, calculation approvals, & supporting documents (Functional specifications, bought item datasheets, etc) for the Sway Frame, & the 700Kg / mtr shielded transfer pipe supports to carry the concrete troughs & lead shielding.
From winter 2016 I started work on the Dungeness Sludge Retrieval System contributing significantly to the system performance requirements to fill waste containers (DCIC’s) with sludge using a vacuum process.
Was responsible for concept 3D design layout & functional specification for a wet waste transfer system to empty part filled waste containers directly in to containers on the AVDS dryer.
Other images associated with this role:
