Industrial fissile package - Ramtuc

Contents• Application• Package design.• Key Dates.• Criticality Approach.• Shipboard Assessment• Criticality Summary• Separate Presentation• Nexia FE Modelling.Date 11/17/11Slide 2

3573 IF-96 ApplicationSummary of approachDate 11/17/11Slide 3

3573 IF-96- Contents• Recap on our approach and why• Submission Strategy• IF Regulatory requirements• Package Design and Progress• Package Criticality Control• FEA (NCT)• Vessel LoadingDate 11/17/11Slide 4

3573 IF-96 - Recap on our approach and why• Optimise Shipments (ALARP)• Operate one system for the International transport of enrichedRep U03 (Thorp)• Cost effectiveDate 11/17/11Slide 5

3573 IF-96 - Submission Strategy• PDSR (para 801)• Shipment Approval (UK to St Pete) (para 820c)• RPP (576 & 820d)• Documentation List• TimescalesDate 11/17/11Slide 6

3573 IF-96 - IF Specific Regulatory requirements• IF Specific Regulatory requirements (para 528)• LSA-II contents (para 523)• IP-2 Package Requirements (para 622 or alternatively 627)• Fissile Package requirements 677 – 682, focusing on para675!, 681a,b (NCT only)Date 11/17/11Slide 7

3573 IF-96 - Vessel Loading• Ti & CSI values not used to demonstrate control on vessel(para 576)• CSI – crit assessment for the vessel• Ti – Additional Shielding Assessment• Existing RPP for the Atlantic Osprey• RPP Supplement to incorporate aboveDate 11/17/11Slide 8

Package 3573 DesignPresented by: Chris SouthernDate 11/17/11Slide 9

Current Position - The New Package design• The package will comprise of a full height ISO freightcontainer (British Nuclear Group Industrial Fissile (IF)Package Design No 3573).• This container will have a single end opening door that canwrap around and latch to the side of the container• The door aperture will be large enough to allow fork truckaccess into the container.• The door closure mechanism will be a simple design utilisingthreaded fasteners, clamps and or simple lever/cam typemechanisms. The use of motors, pumps, hydraulics, gearboxes etc will not to be considered.Date 11/17/11Slide 10

Current Position - The New Package design• The package specific internal load restraint system will beused to secure up to eight UO3 drum pallets with a maximumof 64 drums in total. (8 per Pallet).• Each Drum weights 210Kg Gross, 63 Drums equates to 11 tU.• The internal load restraint system has been designed toprovide safe transport for a minimum of one to a maximum ofeight laden pallet under normal conditions of transport.Date 11/17/11Slide 11

Current Position– Loading the IF3573 ISODate 11/17/11Slide 12

Current Position– Loading the IF3573 ISODate 11/17/11Slide 13

Current Position– Loading the IF3573 ISODate 11/17/11Slide 14

Current Position - The Way forward-ISO 3573• BN-GS have a contract with Croft Associates to design andmanufacture a prototype ISO. With YML being themanufacture sub contractor.• The new design of the IP2 IF ISO freight is under the controlof a BN-GS technical specification and as such will bedeveloped in line with the required regulations.• On completion of this design BN-GS will hold the intellectualproperty rights for this design package• BNGS will then be owning and submitting the PDSR.Date 11/17/11Slide 15

Project Strategy – Key Dates• Manufacture & Test IF 3573 ISO Prototype July 07• Submit PDSR to the DfT Sept 2007• DfT Approval of the PDSR & shipment approvals April 2008• Submit for Russian Validation April 2008• Obtain Russian Competent authority approval Sept 2008• Ship Uo3 material to Russia September 2008Date 11/17/11Slide 16

Package 3573 CriticalityPresented by: Chris SouthernDate 11/17/11Slide 17

Criticality Safety Case - Recap• Transport on land• “Conventional” criticality assessment fully in accord with TS-R-1, para’s 677-680,68, and 682.• Groups, separated by 6m• CSI = 100/N• Package and Group “Infill” with U(

Criticality Modelling - Recap• Standard approach to modelling• Fissile material in a Group modelled as a reflected sphere• Group modelled as full theoretical density uniform mixture of U(x)O3/water.• 1 ≤ x ≤ 1.24• Heterogeneous - bounding particle size distribution.• Close-fitting infinitely thick reflectors (water or UO3 / water for in-fill)• Derived limits apply to a single Group• Limits for non infill and Group/package infill with U(1)O 3Date 11/17/11Slide 19

Criticality Modelling - Recap• Package In-fill: Mixing U(1) with U(x) insideISOs• 1 < x < 1.24• Want to fill space in ISO with U(1)O3• Have modelled “mixed ISO” as core /reflector modelInner sphere mixture of 0.1,0.0355 and 0.0053 cm radiusU(x)O 3 particles. 1.05 ≤ x ≤1.24. Water moderation.Optimised packing fraction 30 cm thick Outer sphere of0.1 cm radius U(1)O 3particles. Water moderation.Packing fraction - 0.39. Date 11/17/11Slide 20

Criticality Safety Case - Recap• Package infill - No Group infillmixed 6 m mixed 6 m All U(x) All U(x) Date 11/17/11Slide 21

Criticality Safety Case - Recap• Group Infill with U(1)6 m mixed < 1% mixed < 1% < 1% < 1% < 1% < 1% 6 m All U(x) < 1% All U(x) < 1% Date 11/17/11Slide 22

Shipboard assessment• Typical arrangement on ship – max 24 x ISO• Interior of ISO – 64 drumsDate 11/17/11Slide 23

Shipboard assessment• Pessimistic representations of ship/ ISOs• 2-D infinite array (a single deck)• 4 x 3 x 4 arrays = 48 (interaction between decks)• Credible upset conditions• ISO damage –– Loss of containment - powder spillage– Additional packages– Overstacking– XS enrichment– Firefighting with water (sprays, moderation of powder)Date 11/17/11Slide 24

Criticality “State of Play”• Already Prepared:– Criticality Assessment for Land Transport – all models, calcs, results,etc– Part III• In preparation:– Sea transport assessmentDate 11/17/11Slide 25