Fire protection – Combustible Shielding in Instrumental Buildings

Daniel Rosberg - WSP ABDan Madsen – Grontmij AB

Fredrik Jörud – ESS AB

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Planning and Building Act (ESS-0002382) Natural Fire => roof steel members No resistance & pillars 60 minutes

OK

3

Radiation Protection Act (ESS-0001051)

• “As far as reasonable practical, non- combustible materials should be used in installations”

• “Detect and extinguish quickly those fires that do start”

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General Safety Objectives (ESS-000004) Ionization radiation

> 1 mSv to public within a return time of 10 000 years

> 20 mSv to public within a return time of 1 000 000 years

Demonstrate how to avoid:

> 100 mSv to public within a return time of 10 000 000 years

Recommendation to limit loss of property (ESS- 0001126)

> 7 M€ => AUT SUPPRESSION

> 50 M€ => AUT SUPPRESSION + ANALYSIS

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Purpose: Evaluate how to handle the combustible shielding to meet requirements

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SUMMARY

Install sprinkler in caveInstall sprinkler in hall ceilingAllow only redesign of 1 instrument

simultaneously OR apply 5 m safety distanceKeep HGV on 10 m distance to unprotected

fire load Keep field offices/labs on 2 m distance to

unprotected fire load