RECENT REMOTE HANDLING EXPERIENCE AT NUMI/ANUNBI 2012 P. Hurh (FNAL)Nov. 10, 2012
Overview Experiences over past 2 years (since last
NBI) MiniBooNE NuMI Target Support NOvA Target Hall Re-configuration C-0 Remote Handling Facility
Future Concerns Support of future experiments Long Term Radioactive Storage and
Disposal Dose rate prediction tools
Over past 2 years MiniBooNE
Only maintenance and inspection activities No Horn/target replacement needed for ~8 years
NuMI/MINOS No Horn replacement needed Many Target problems (J. Hylen’s earlier talk) From the remote handling perspective:
Standard replacement procedures (5 replacements in 2 years was not standard!)
Specialized target autopsy tool successful
Residual Radiation
Horns and Targets supported on the bottom of large shielding modules Replaced in a simple work cell (no manipulators) where almost all
activities take place above the module through holes using specialized tools
Radioactive components are transported in end-loaded casks using a system designed by Vladimir Sidorov
Measured dose rates for NuMI Horn 1 water line repair (250 kW proton beam)
NuMI Work Cell
NuMI Target Hall
NuMI Horn Transport Cask
V. Sidorov’s Target Autopsy Tool Similar to a tubing cutter:
Target Cutting Tool Lined up to Target in NuMI Work Cell
NuMI Target NT-05 Cut-Apart
NOvA Target Hall Re-configuration Change to Medium Energy Optics for NOvA
requires moving the second horn location about 9 meters downstream
Target Chase area has been irradiated from many years of NuMI operation
Careful preparation and planning predicted total dose to worker of 2,495 mrem
Job was just completed in Sept-Oct 2012 with a measured dose of 1,538 mrem
Lead engineer: Salman Tariq
NOvA Target Hall Re-configuration
Clear out new location for Horn 2
Lower shielding blocks handled remotely
Storage for shield blocks
Horn 2 carriage installed
Temporary shielding to limit dose from upstream
T-block kinematic mounts
Horn 2 Lowered into carriage
T-Block Installation
Horn 2 installed (utilities yet to be connected)
C-0 Remote Handling Facility Needed to enable (while running beam):
Repairs Autopsies Volume reduction
Uses C-0 Detector Assy Bldg (from canceled B-Tev project) 10 m deep pit Triple redundant sump system Connected to Tevatron tunnel (future expansion
opportunity?)
C-0 Remote Handling Facility
Repair Cell Approximately 6m x 7m (internal
dimensions) Internal overhead crane (10 ton) and jib
crane (2 ton) Re-furbished Lead Glass Window
(PLUTO project- nuclear ramjet) 1 new manipulator, 1 surplus
manipulator Large sliding steel doors
Storage Bays 3 Large storage bays End load design allows for shielded
transfer Lead Engineer: Vladimir Sidorov
Lead Glass windows came from 1950’s era Project Pluto!
C-0 Repair Cell
C-0 RHF Storage Bays and Cask
C-0 Repair Cell
C-0 RHF Manipulators
C-0 RHF Remote Handling Tzar Sidorov
Future Concerns: Proposed Facilities Near & Mid-Term
NOvA (50-400 R/hr) Micro-BooNE (20-100 R/hr) Mu2e (300,000 R/hr!!) G-2 (12-60 R/hr) ORKA? NuSTORM?
Long Term (Project X) Four simultaneous running
target facilities at 1+ MW each!
Project X Reference Design
Project X Staging Layout
Future Target Facilities Impact:
Higher activity levels Multiple locations on site Increased frequency of handling
Requires: More sophisticated equipment More time for operations More and better-trained staff Better management of entire life cycle (LT
storage and disposal)
Long Term Storage and Shipment Facility
In order to handle the possibly hundreds of highly activated components from the rich Project X program, Fermilab is considering building a facility to: Safely and securely hold radioactive items
to decay Volume reduce large radioactive items Package decayed items for off-site disposal
Preliminary design features expandability to adapt to future needs
LTSF – Conceptual Design
Expandable end wall
Earth berm
Large Shielded
PitWork Cell
Large Item Bays
Control Room
LTSF - Expanded
Dose Rate Prediction Tools for Multiple Sources
What tools exist to predict dose rate at a point in space from multiple sources?
What can be developed?I v
neutrinos