Fire Protection of PE Radiation Shielding Daniel Rosberg

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

Borated PE – burning behaviour

Borated PE – burning behaviour

Building fire protection Evacuation Structural elements

Building fire protection Fire compartmentation Surface lining materials

Rescue service operation 30 MW +

Instrument fire Length (m) 10 4 5 6 8 Width (m) 6 4 5 6 4 Height (m) 8 5 4 3 3 Max HRR (MW) 90 30 30

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

Protecting the shielding material Safety distance +

Instrument during construction Borated PE 5 m – 6 MW 10 m – 30 MW Safety criteria: 135°C 7. 4 k. W/m 2 2 m – 1 MW 10 m – 30 MW

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

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

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