1. Fire Protection of PE Radiation Shielding Daniel Rosberg, WSP 2014-10-06

2. Borated PE – burning behaviour

4. Building fire protection EvacuationStructural elements

5. Building fire protection Fire compartmentationSurface lining materials

6. Rescue service operation + 30 MW

7. Instrument fire Length (m) Width (m) Height (m) Max HRR (MW) 10 6890 44530 554 663 843

8. Sprinkler  Sprinklerbild! Limited to 6 MW Will limit fire spread to secondary fuel packages. Still a 30 MW fire

9. Protecting the shielding material Safety distance +

10. Instrument during construction Borated PE 5 m – 6 MW 10 m – 30 MW 2 m – 1 MW 10 m – 30 MW Safety criteria: 135°C 7.4 kW/m 2

11. Instrument during construction Borated PE No limit 2 m – 1 MW 10 m – 30 MW 60 mm 1GF + 1 GA

12. Conclusions Fires  30 MW is the largest fire allowed  Rescue service operation  Roof construction  HGV fire is approx. 30 MW  Instrument fires can, however, be larger (90 MW) Is sprinkler required?  No if instruments can be limited in size  Yes if full flexibility is required  Instrument size  Number of instruments being unprotected simultaneusly

13. Conclusions How to protect PE  Encasing (#1)  Limit fire spread  Protected fire load  Safety distances (2-5-10)  Sprinkler  Small instruments …or…  Combination thereof