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CBRN

Radiological/Nuclear

CBRN event in Netherlands on Thu 21st November 1996

21st November 1996

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On 21 November 1996, it was discovered that a 15 cm diameter unfiltered containment ventingline was actually open to the outside air, while its 4 block valves all registered "closed". It appeared that the valves had all been mispositioned, apparently as a result of maintenance work 9 months earlier.
The deviation was corrected within 2 hours. The 4 valve ball spindles were 90 degrees rotated with respect to the motor drives and correctly attached to the position indicators.
Justification:
Based on the Users Manual Table I: Criteria for Degradation of Defence in Depth without an initiator, with frequency medium and safety function inadequate the event is classified as level 2.

Contextual analysis

Analysing the event count by highlighting the presence of munition categories over a six-month data period.

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Country information

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Netherlands (NLD)

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