RE: [sc] CERN Safety concerns

RE: [sc] CERN Safety concerns

From: Allen, Dock <dock_at_xxxxxx>
Date: Thu, 12 Nov 2009 14:17:46 -0500
Message-ID: <2A8C361000E22F4895ACA58412E8F06CFE91351A@xxxxxx>
"Unlikely??" - we don't allow even a 10 nsec window of vulnerability for safety of flight, so why do we allow a "small probability" with this.  Harumph


From: safety-critical-request@xxxxxx [mailto:safety-critical-request@xxxxxx] On Behalf Of Martyn Thomas
Sent: Thursday, November 12, 2009 2:06 PM
To: safety-critical@xxxxxx
Subject: Re: [sc] CERN Safety concerns

Does anybody know if a Safety case/report is available for public viewing or explain why this highly interesting Safety example is not discussed on this forum, considering this forum is thought to be at the "pointy end" of the System Safety discipline.

If we are looking for risks to worry about, New Scientist last week said that "Starting as early as next month, the Campi Flegrei Deep Drilling Project is planning to drill seven [deep boreholes] in the region. ... ... Most of the metropolitan area of Naples is located within the caldera. ... A major eruption like the one 39000 years ago would leave large parts of Europe buried under a thick layer of ash. ... Campi Flegrei is one of the highest risk volcanic areas on earth.  ... Researchers on the Campi Flegrei project accept there are some small risks, but say that prior safety assessments found that triggering a major eruption is unlikely."

Consequence: catastrophic. Probability: "unlikely."

That doesn't rate as "tolerable" on any scale I know about.

Martyn Thomas FREng

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Received on Thu 12 Nov 2009 - 19:17:56 GMT