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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)
Width (m)
Height (m)
Max HRR (MW)
10 6 8 904 4 5 305 5 4 306 6 3 308 4 3 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
Borated PE
Borated PE
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/m2
Instrument during construction
Borated PE
Borated PE
No limit
2 m – 1 MW
10 m – 30 MW
60 mm
1GF + 1 GA
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
Conclusions
How to protect PE
Encasing (#1) Limit fire spread Protected fire load
Safety distances (2-5-10) Sprinkler Small instruments
…or… Combination thereof
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