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