HiRadMat : report from WG2&3 – WANF dismantling

February 4, 2010S. Evrard

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• Worksite: activities in progress– TNC cleaning completed– Beam line dismantling– TCX block removal

• Cooling & Ventilation issues• Cabling issues• IEFC workshop talk

Agenda

Worksite : activities in progress (W3,4,5)

February 4, 2010S. Evrard

2 TNC cleaning completed (ENDEL & DG/SCR)

Cleaning of good quality Smear tests taken where contamination was the highest: reduction by a 10 factor

(all smear tests < 1Bq/cm2 = contamination level)Dosimetry below estimates (collective dose 2.2 mSv where 2.8 was estimated)

0200400600800

10001200

day 1

day 2

day 3

day 4

day 5

Staff 1 (µSv)

Staff 2 (µSv)

staff 3 (µSv)

Estimate (µSv)

February 4, 2010S. Evrard

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• 2 magnets, many beam monitors, He station, VAC pipes removed.

• DIMR level 2 written prior to intervention: EDMS 1058846

• Collective dose around 500 µSv (mechanics + transport)

• Magnets recuperated, remaining stuff as radioactive waste

Beam line dismantling (Michael Lazzaroni & DG/SCR)

Worksite : activities in progress (W3,4,5)

February 4, 2010S. Evrard

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• Automatic hook available: movie• Shielded forklift ready (dose rate reduced

by a factor 5 !)• Blocks removed and stored in TT61• Next steps under study (TI2 line is a big

constraint on handling procedure)

TCX blocks removal (Serge Pelletier, DG/SCR)

Worksite : activities in progress (W3,4,5)

Cooling & Ventilation issues

• Cooling stationWater contaminated waste management to be defined by DG/SCR

• Ventilation unitUnit in TA7 definitely out of order dismantling

Smear tests taken in air ducts

Reinforce air tightness of two existing doors (no way to install a new one due to crane garland)

February 4, 2010

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S. Evrard

February 4, 2010S. Evrard

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• Remove old cables (DC + signal) from TNC cable trays up to patch panel in TA7

• Make room in cable trays from patch panel to BA7 for new routing of about 10 DC cables

• Work to be performed during LHC technical stops

Cabling issues

BA7TNC

IEFC workshop on Feb. 11

February 4, 2010S. Evrard

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• Project overview (goals, location, Project organization)• Beam line (design, …)• WANF dismantling (RP survey, scanning, crane repair ,

cleaning, WANF & T1 dismantling,…)• Irradiation area (access, CV, RP monitoring, dump design)• Schedule (critical items, critical path)• Operation (beam time and user handling)• Conclusions

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