Скачать или смотреть Cyclife First Ever Non-Routine Disposal at LLWR for NRS Winfrith Site

Background
Nuclear Restoration Services at Winfrith NPP needed to move 1,068 sludge-filled,Treated Radwaste Store (TRS), drums for disposal as part of its decommissioning.The Low-Level Waste Repository was chosen as the designated disposal site for the drums. Cyclife UK was in charge of the developing the methodology to handle and dispose the TRS drums and to undertake the on-site delivery.

Challenges
Methodology Development
Methodology Testing and Compliance
Radiation Dose Calculations
Physical Placement
3D-Modelling Integration

Our Solutions
1/ 2016-2018: Define project requirements and BAT assessment
2/ 2019-2020: Detailed survey, BAT work and emplacement plan
3/ 2019-2021: Develop methodology, procure equipment and civil enabling works design
4/ 2020-2021: Equipment and methodology trials and infrastructure modifications
5/ 2021-2024: Ongoing drum emplacement activities

Cyclife UK conducted a finite element analysis to assess structural integrity under diverse loads aligned with BS EN 13001-2:2021*(*European and British Standard for Crane Safety, General Design and Load Actions)

Multiple drum grabs were chosen to accommodate various lifting scenarios
Cyclife UK investigated feasibility issues: operator exposure and fence-line dose rates with DEMplus®3D-based tool by Cyclife Digital Solutions
DEMplus®3D-based software helps to simulate interventions and assess simultaneously their cost, time, waste, risk, and dose rates.

12 single TRS drums were modelled in steel container on wooden blocks with DEMplus®, MicroShield and MCNP6
Drums modelled outside container in the same arrangement and emplaced in Repository vault as final step

Customer's Benefits
Earlier disposal of the TRS drums
Better utilisation of available space in a disposal vault, resulting in the use of less infill material
No need for conontainerising the drums in half height ISO containers with the direct disposal of the encapsulated drums

“It is a significant achievement and a step closer to completing NRS decommissioning mission and returning the site to heathland with public access.” said Nuclear Restoration Services Winfrith NPP

Results
Time saving with a total of 1,068 TRS drums checked efficiently
Cost savings since the Intermediate-Level waste was re-categorised as Low-Level

Cyclife provides enabling works that help accelerate decommissioning to allow the transport of large components from customers’ sites. Valuable metals are sent via trusted waste routes for recycling.

Find out more about Cyclife solutions: www.cyclife-edf.com