European Organization for Nuclear Research - Organisation européenne pour la recherche nucléaire

Typical corrective intervention

Failure & call of the CCC

•About 30’

access request

•Depending of the LHC status

•Between 1h and few days (2 days)

Diagnostic (pump failure)

•About 1h

RP analysis & transport requested

•1h to be at cern

Rp results & new pump

on site

•between 2&3 hours

Draining & pump

replacement

•Between 2&3 hours

restart of the station

21h30•The failure happen and the CCC call the piquet which make the first diagnostic in remote

22h00•The piquet ask an access for check the system

23h00•After check of the system

00h00•The RP piquet has 1 hours for to be at cern

3h00•The RP analysis need ~3 hours for give the results, during this time we can prepare the material

+3h•Average we need 3 hours for drain a system

6h00

European Organization for Nuclear Research - Organisation européenne pour la recherche nucléaire

• We need about 8h30 of intervention for replace a pump on each experiment, depending of the experimental cavern access for Alice, CMS & Atlas.

• Cavern access request: done by the experiment• RP analysis request: ask by the CV/DC piquet• Transport and support request: done by CV/DC piquet• Sample bottles: RP inspector excepted for the sampling of TOTEM, Evaporative & SPD which need a

special bottle

• Important phone number during non working hours– CV/DC piquet & CCC: 72201– RP inspector: 74848

• Important phone number during working hours– CMS: Lefils Daniel 162915– ATLAS: Crespo-Lopez Olivier 161042– LHCB: Corbaz Florian 165426– Alice: Roussee Sebastien 163650– RP inspector 75252– CCC 72201

Typical corrective intervention