CERN ATOMTEX BDKG-24 Manual Download Page 37

Page: 37 / 93

REFERENCE

EDMS NO.

REV.

VALIDITY

TOF-TAR-PRD-0001

1867100

1.0

RELEASED

Page 37 of 93

Dose rates: 2 mSv/hr @ 10 cm

Dose rates: 1 µSv/hr

First cut (chamber vertically in the pit)

Second cut (chamber vertically in the pit)

Third cut (chamber lying horizontally in EAR2)

Summary of Contents for ATOMTEX BDKG-24

Page 1: ...s in the vertical beam pipe to gain access to the n_TOF target 2 from the technical gallery It is assumed the detectors and the associated equipment have been removed before this work starts This docu...

Page 2: ...added to give a better overview More photos and dimensions were added to give clarification for certain operations The dump removal process was also added between 80 90 Estimations for time and hands...

Page 3: ...assembly 20 140 Remove cover lead vacuum valve transition flange Al vacuum chamber 21 150 Remove borated polyethylene elements and B4C 22 160 Remove collimator 2 23 170 Remove steel balls 24 180 Remo...

Page 4: ...Remove solid version of round shielding block 1 59 430 Remove centring plate 60 440 Raise target to technical gallery whilst pipes are cut 61 450 RP measurements of the target 63 460 Remove the targe...

Page 5: ...assembly removal extraction and cutting 85 650 Technical gallery cleaning 86 660 Remove dump core insert 87 670 Remove Cap around outer beam dump 88 680 Remove outer dump blocks 89 690 Remove inner b...

Page 6: ...cedure document EDMS 1302710 The first version of the document illustrated the tasks without specifying how they will be carried out however the format of the document was designed to allow more infor...

Page 7: ...hat the new target 3 can be installed In the figure below it can be seen that the area can be split into two sections above the technical gallery and below It is assumed that the detectors have been r...

Page 8: ...volved EN STI EN HE EN CV EN SMM HSE RP Comments Radiation Protection prep survey Cleaning and plastic floor foil Installing fenced area in ISR Simple Controlled Radiation Area Create storage area in...

Page 9: ...D Page 9 of 93 Name of task 20 Break vacuum Exposed people Local dose rate 0 1 Sv hr Workforce 1 person Time needed 1h Calculated dose Responsible EN EA Involved EN EA HE RP TE VSC Comments The valves...

Page 10: ...k 30 Disconnect filter box and permanent magnet vacuum tubes Exposed people Local dose rate 0 5 Sv hr Workforce 2 people Time needed 2h Calculated dose Responsible EN EA Involved EN EA TE VSC Comments...

Page 11: ...Name of task 40 Remove magnet Exposed people Local dose rate 0 5 Sv hr Workforce 5 people Time needed 1 5 day Calculated dose Responsible EN EA Involved TE MSC EN HE EN EA Comments To be stored in th...

Page 12: ...67100 1 0 RELEASED Page 12 of 93 Name of task 50 Remove filter box Exposed people Local dose rate 0 5 Sv hr Workforce 4 people Time needed 0 5 days Calculated dose Responsible EN EA Involved EN HE EN...

Page 13: ...Fit cover plate to vacuum chamber 1 Exposed people Local dose rate 0 5 Sv hr Workforce 2 people Time needed 15 minutes Calculated dose Responsible EN EA Involved EN EA Comments JL Grenard EN HE sugges...

Page 14: ...ve rails and aluminium ventilation sealing plate Exposed people Local dose rate 1 Sv hr Workforce 2 people Time needed 2h Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments All the...

Page 15: ...oncrete shielding bricks Exposed people Local dose rate 5 Sv hr Workforce 3 people Time needed 2 days Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments 40x20x10cm 320 blocks 3 peo...

Page 16: ...al dose rate 10 Sv hr Workforce 3 people Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments The upper bellow needs to be removed to allow a flat plate to be plac...

Page 17: ...er pit Exposed people Local dose rate 10 Sv hr Workforce 3 people Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments This cover will needed to support vehicles l...

Page 18: ...Page 18 of 93 Name of task 110 Remove connecting pipe Exposed people Local dose rate 0 1 Sv hr Workforce 3 people Time needed 0 5 days Calculated dose Responsible EN EA Involved EN EA EN HE Comments...

Page 19: ...vacuum chamber upper parts Exposed people Local dose rate 0 1 Sv hr Workforce 3 people Time needed 0 5 days Calculated dose Responsible EN STI Involved EN STI EN HE HSE RP Comments Cherry picker and 2...

Page 20: ...l dose rate 0 1 Sv hr Workforce 3 people Time needed 0 5 days Calculated dose Responsible EN STI Involved EN STI EN HE HSE RP Comments The detector itself will have been removed before by those runnin...

Page 21: ...93 Name of task 140 Remove cover lead vacuum valve transition flange Al vacuum chamber Exposed people Local dose rate 0 1 Sv hr Workforce 3 people Time needed 0 5 days Calculated dose Responsible EN...

Page 22: ...cal dose rate 0 1 Sv hr Workforce 3 people Time needed 1 hour Calculated dose Responsible EN STI Involved EN STI EN HE HSE RP Comments Shouldn t be radioactive 1m long section of B4C in two parts also...

Page 23: ...RP Comments Collimator2 is 2m long steel Partially radioactive small levels There is a process for swapping collimators so this could be consulted Pink hooks as seen in the picture must be screwed in...

Page 24: ...s connected to one of the 2 inch valves in the sphere retaining plate is used The hose is stored in the target service gallery The spheres are collected in a 1m3 bag on the floor of the service galler...

Page 25: ...acuum chamber big vessel a big plastic film has to be positioned below the beam pit as steel spheres may stay in the pit on the flat surfaces Bag below pit in technical gallery The vessel and vacuum c...

Page 26: ...3 Name of task 190 Remove the flange support and the sliding pads Exposed people Local dose rate 0 1 Sv hr Workforce 3 people Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN STI...

Page 27: ...R2_0211 Outer diameter 780mm Inner diameter 476mm Mass 1100kg An estimated 4 meters into the beam pit Someone will have to climb into pit to attach the lifting points This person should also ensure th...

Page 28: ...ible EN EA Involved EN EA EN HE HSE RP Comments Installed from below Will be working in the gallery Silicone mastic sealant will have to be removed weakened before the ring can be lifted out Load cell...

Page 29: ...a for Target 2 removal items below the gallery Exposed people Local dose rate Workforce Time needed Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments Checking Cleaning Nothing rem...

Page 30: ...Page 30 of 93 Name of task 230 Remove supporting cover over pit Exposed people Local dose rate 10 Sv hr Workforce 3 people Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN HE HS...

Page 31: ...HE HSE RP Comments Radiation levels to be determined by RP see next page As the collimator will be activated 300 Sv at the bottom it can be lifted by Bonfanti crane in EAR2 Monorail is not installed a...

Page 32: ...REFERENCE EDMS NO REV VALIDITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 32 of 93 Dose rates 1 Sv hr Dose rates just above the bottom 100 Sv hr 10 cm Dose rates at the bottom 200 Sv hr 10 cm...

Page 33: ...er long vacuum chamber Exposed people Local dose rate 10 Sv hr Workforce 3 people Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments There is a short vacuum cham...

Page 34: ...Exposed people Local dose rate 10 Sv hr Workforce Time needed Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments A cover needs to be installed over the vacuum chamber to stop thin...

Page 35: ...kforce 4 people Time needed 2 hours Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments Installed with monorail But monorail won t be available at this point Some concrete blocks co...

Page 36: ...mm If flange is cut tube will fit through concrete ring and its support but will need new fixing points to hoist Vacuum tube length is 8898 58mm Lowest 1m will be activated hot This will be stored in...

Page 37: ...ITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 37 of 93 Dose rates 2 mSv hr 10 cm Dose rates 1 Sv hr First cut chamber vertically in the pit Second cut chamber vertically in the pit Third cut chamber...

Page 38: ...l dose rate 1 Sv hr Workforce 4 people Time needed 0 5 day for installation 2 hours for load test Calculated dose Responsible EN HE Involved EN HE HSE Comments This must be done after the vacuum chamb...

Page 39: ...D 0001 1867100 1 0 RELEASED Page 39 of 93 Name of task 280 Load test monorail track Exposed people Local dose rate 1 Sv hr Workforce 4 people Time needed 2 hours Calculated dose Responsible EN HE Invo...

Page 40: ...ame of task 290 Remove supporting cover over pit Exposed people Local dose rate 10 Sv hr Workforce 3 people Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments Th...

Page 41: ...f task 300 Remove support frame for vacuum chamber 1 Exposed people Local dose rate 10 Sv hr Workforce 2 people Time needed 30 min Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comment...

Page 42: ...l dose rate 10 Sv hr Workforce 3 people Time needed 4 hours Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments These need to be removed using the monorail There are 4 blocks These...

Page 43: ...move support for square shielding Exposed people Local dose rate 10 Sv hr Workforce 2 people Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN HE HSE RP Comments Lifting spreader...

Page 44: ...be done in the cooling station away from the target Water needs to be sucked pumped out at different heights to remove as much water as possible Planned Procedure 1 Pressurise circuit and push water o...

Page 45: ...g on the level of contamination It will be stored in ISR8 Storage Area To be removed through Technical Gallery trap door to allow entirety to be done with remote handling Telescopic forklift needed to...

Page 46: ...rkforce 2 people Time needed 0 5 days Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP Comments This task will be performed from the Technical Gallery A solid version of the shielding bl...

Page 47: ...me needed 1 day Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP Comments This step needs to be done if the water level is above the pipe connection roughly around the position of shield...

Page 48: ...e 48 of 93 Name of task 336 Remove solid version of shielding block 4 Exposed people 0 Local dose rate Workforce 2 people Time needed 0 5 days Calculated dose Responsible EN STI Involved EN EA EN HE H...

Page 49: ...ped depending on the level of contamination They will be stored in ISR8 Storage Area To be removed through Technical Gallery trap door to allow entirety to be done with remote handling Telescopic fork...

Page 50: ...the Technical Gallery A solid version of the shielding block 1 exists with no hole in the middle The original shielding block 1 will be exchanged by the solid one in order to Provide a base to work f...

Page 51: ...REFERENCE EDMS NO REV VALIDITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 51 of 93 Dose rates 1 uSv h Dose rates 500 uSv h...

Page 52: ...eople Time needed 1 hour Calculated dose Responsible EN EA Involved EN EA EN STI EN CV HSE RP Comments This task will be performed from the Technical Gallery A solid version of the shielding block 1 e...

Page 53: ...erson will be working there He will be supported by 1 or 2 people in the Technical Gallery The dose rate in this area does not include the possible contamination inside the pipes This contamination ma...

Page 54: ...e rate 100 Sv hr Workforce 3 people 1 down 1 or 2 in Tech Gallery Time needed 5 min Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP EN CV Comments A manual winch will be needed to recov...

Page 55: ...r 2 in Tech Gallery Time needed 10 min Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP EN CV Comments Pipes should be closed with plastic bags The plates will be stored in the ISR8 Stor...

Page 56: ...in Tech Gallery Time needed 10 min Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP EN CV Comments Pipes need to leave clear space for target lifting The flexible pipes will be tied to...

Page 57: ...t been dropped low enough in previous stages A manual winch will be needed to recover persons in the case of an emergency The intervention inside the pit will be confined space work so all the necessa...

Page 58: ...esponsible EN STI Involved EN EA EN HE HSE RP EN CV Comments Everything should be checked before moving on from this stage as afterwards the target will be exposed HSE RP suggests that since this is a...

Page 59: ...task 420 Remove solid version of round shielding block 1 Exposed people 0 Local dose rate 70 Sv hr Workforce 2 people Time needed 2 hours Calculated dose Responsible EN STI Involved EN EA EN HE HSE R...

Page 60: ...Calculated dose 0 Responsible EN STI Involved EN STI EN HE HSE RP Comments This was not secured when it was installed This needs to be done before the target can be removed as it blocks access to the...

Page 61: ...places The first cut will be made 80 cm 20 cm from the top of the pipes The second cut will be made as close as possible to the top of the target The advantage of this is that in both fragments of cu...

Page 62: ...REFERENCE EDMS NO REV VALIDITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 62 of 93...

Page 63: ...Sv hr Workforce Time needed Calculated dose Responsible HSE RP Involved EN EA EN HE EN SMM Comments Once the pipes are cut and while the target is hanging from the monorail RP will perform measurement...

Page 64: ...be moved along the Technical Gallery and lowered through the trapdoor The area below the trapdoor will be prepared for draining It will be covered in plastic sheets A draining tray measuring 1500x1500...

Page 65: ...REFERENCE EDMS NO REV VALIDITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 65 of 93...

Page 66: ...open The valve to the cooling water container will be closed This can be done by hand before the target arrives The water container will be connected by a flexible hose to the draining tray The locati...

Page 67: ...ll the Bonbonne 50 l described in EDMS 1723932 SCEM 55 50 40 610 0 3 holes need to be performed to fully drain the cooling circuit The first hole is a continuation of the hole that was made in task 50...

Page 68: ...REFERENCE EDMS NO REV VALIDITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 68 of 93...

Page 69: ...te 2000 Sv hr Workforce Time needed Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP Comments This is to be done by the monorail hoist in the technical gallery using remote handling The...

Page 70: ...ay spacer blocks will be removed from under the trapdoor A shielding box resting on a trolley will be placed under the trapdoor The shielding box will be designed by EN STI It will need to provide suf...

Page 71: ...eded Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP Comments This will be done by electric tractor and tow bar 3m The target needs to be pulled out of the radiation protection area cag...

Page 72: ...PSI container Exposed people Local dose rate 2000 Sv hr Workforce Time needed Calculated dose Responsible EN STI Involved EN HE HSE RP Comments This is to be done with the ISR crane The target will be...

Page 73: ...REFERENCE EDMS NO REV VALIDITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 73 of 93...

Page 74: ...needed Calculated dose Responsible EN HE Involved EN EA EN HE HSE RP Comments The PSI container can then be transported in the RP RW premises ISR6 and stored safely with concrete blocks waiting to be...

Page 75: ...eparate the pipes The sharp edges of the pipes need to be covered with tape Then the pipes need to be placed inside two bags double layer of protection A procedure for this will be developed either wi...

Page 76: ...al dose rate 70 Sv hr Workforce Time needed Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP Comments This will be done in order to remove the vertical cooling pipes from the pit It will...

Page 77: ...cult to predict the dose rate in this area due to the contamination the may exist in the interior of the pipes Experimental measurements will take place once there is access to this area The disconnec...

Page 78: ...ime needed 10 min Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP EN CV Comments Remove the bindings that were installed in Task 390 to keep the flexible sections out of the way A manua...

Page 79: ...TI Involved EN EA EN HE HSE RP EN CV Comments Tasks 580 600 will be repeated 2 times one for each pair of moderating cooling water pipes The reason for this is that the moderating and cooling water pi...

Page 80: ...ency The intervention inside the pit will be confined space work so all the necessary safety measures should be taken For each support there are two alternatives Disconnect in this task the pipe from...

Page 81: ...dose rate Workforce Time needed 10 min Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP EN CV Comments The pipes could go out in one piece it the monorail drags them along the Tech Galle...

Page 82: ...e cut the size is undefined at this point Their activation will be measured by HSE RP However in case they need to be cut the proposed procedure will be Both ends will be sealed in the Technical Galle...

Page 83: ...l dose rate Workforce Time needed Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP EN CV Comments The pipes connecting the cooling station to the pit form one assembly There are two circ...

Page 84: ...Calculated dose Responsible EN STI Involved EN EA EN HE HSE RP EN CV Comments Similar to the previous task Remove the silicone and remove the fasteners that fix the circular plate to the wall A manua...

Page 85: ...ll going from the cooling stations to the pit The assembly will be extracted using a manual hoist to start with Once it s been extracted a bit it will be attached to the main overhead crane This is wa...

Page 86: ...TOF TAR PRD 0001 1867100 1 0 RELEASED Page 86 of 93 Name of task 650 Technical gallery cleaning Exposed people Local dose rate 10 Sv hr Workforce Time needed Calculated dose Responsible EN EA Involve...

Page 87: ...nsert Exposed people Local dose rate 0 1 Sv hr Workforce 2 people Time needed 4 hours Calculated dose Responsible EN EA Involved EN STI EN EA EN HE HSE RP Comments Installed by hand using cherry picke...

Page 88: ...screws The cherry picker will be needed THIS SHOULD BE DONE IN THE SUMMER TO AVOID WINTER WEATHER The sole purpose of tasks 580 620 is to open the roof access so that the new long vacuum chamber 9 me...

Page 89: ...ith mobile crane Very outer blocks are concrete Underneath blocks are steel Drawing TOFEAR2_0099 Concrete blocks can go in carpark outer steel blocks should be able to depending on dose rate Outer con...

Page 90: ...esponsible EN EA Involved EN EA EN HE Comments Installed by crane Inner steel blocks probably will be activated A cherry picker will be needed A mobile crane will be needed These can go into ISR8 Stor...

Page 91: ...een placed around the ring before the remaining gap was filled with concrete This should allow the ring to be removed The orientation of the concrete ring has to be marked before disassembling this pa...

Page 92: ...crane outside the building and fixed on the ceiling with 8 x Hilti M20x170 30 The plate can support 650kg A cherry picker will be needed A mobile crane will be needed This this be reused it can be sto...

Page 93: ...ENCE EDMS NO REV VALIDITY TOF TAR PRD 0001 1867100 1 0 RELEASED Page 93 of 93 4 List of Annexes 4 1 n_TOF EAR2 Beam Line Installation Procedure EDMS 1302710 4 2 nTOF Target 2 removal Schedule EDMS 206...

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