Shielding & Criticality Assessment Group

• Download flyer: Shielding and Criticalilty Assessment Group (pdf)

Contracts include:

AWE
Nuclear Technologies currently support AWE Aldermaston via a Term Contract for Safety Consultancy Services to support the development of safety cases for various projects including:

• Enriched Uranium Facility project
  
• Revision of the 250 mGy criticality dose contour for a major AWE production facility
  
• Long term secondments into Aldermaston to support the criticality safety assessment of all operations involving the movement, storage or processing of fissile materials
  
• Provision of criticality safety training
  
• Provision of safety advice
  
• Provision of criticality and shielding assessments and documentation

BRITISH NUCLEAR GROUP

Nuclear Technologies have been awarded the following contracts with British Nuclear Group: -

• BNFL Springfields
  o Nuclear Technologies are currently providing a consultant on secondment to provide criticality safety support to several projects at BNFL Springfields.

• BNFL Sellafield
  • Nuclear Technologies provide safety consultancy personnel to assist in the COSR Criticality INSA.
  • Work is presently in progress looking at the Engineering Substantiation of the shielding provisions on a BNFL owned PIE Facility and its associated flasks on the UKAEA Windscale site.

• BNFL Capenhurst
  • In the past, we have also provided criticality safety support via seconded consultants to several projects at BNFL Capenhurst.

UKAEA
Nuclear Technologies supports UKAEA in a broad raft of safety-related tasks. In 1998, the company was awarded a continuing Term Contract for Scientific Consultancy Services from Dounreay, against which numerous orders have been placed, including:

• UKAEA Dounreay
  • Preparation and peer review of safety case documentation and engineering substantiation documents for various plants at Dounreay, including Criticality Incident Detection and Alarm Systems, (CIDAS), 100 mSv Contour Assessments and Shielding Assessments produced as part of the modern standards safety case programme.
  • Development of plant designs for the retrieval of waste from the Dounreay shaft and silo
  • Production of criticality safety assessments for Dounreay operational plant
  • An assessment of the dose to the critical groups from Dounreay Stack Discharges.
  • D1250/1251 Dispersion Modelling Study using PC Cream software.
  • Review of the D1203 Criticality HAZANS (subcontracted by DGP)
  • Peer Review of D1208 CIDAS Omission Case
  • D1203 Dissolver Cell Criticality Assessments (subcontracted by DGP)
    

• UKAEA Harwell
  • Criticality Safety Assessment of Batch Preparation Glovebox
  • CIDAS Omission Case for B462 Waste Handling Complex at Harwell
  
  
• UKAEA Winfrith
  • Shielding assessments for the WOMAD East Treatment Plant (subcontracted by RWE Nukem)

UK NIREX LTD
Nuclear Technologies holds a Term Contract for Criticality and Waste Packaging Safety Consultancy Services by UK Nirex Ltd., the body responsible for the provision of a national geological repository for the disposal of radioactive waste. Various packages of work have been placed as a result.

GE HEALTHCARE
Nuclear Technologies have recently completed a project to determine the bulk biological shielding and neutron activation for a cyclotron vault that is used in the production of radioisotope sources for use in Positron Emission Tomography (PET). This work has subsequently been expanded for GE Healthcare (who now own Amersham) to look at dose rates from a self-shielded cyclotron in a European Member State.

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