Overview of HINS Operations and Radiation Shielding Considerations in the Meson Detector Building Bob Webber August 16, 2006 Layout with One SSR-2 Cryomodule Review of Work on this Topic Webber Proposed Beam Ops Document, July 2005 and revisions (now Beams Doc. #2394) Describes operating parameters at different energies and different stages of installation Vaziri Preliminary shielding/dose estimates, February 2005 Assumed beam energies up to E Hz for 1.35E18 pph Finds 14.7 R/hr on top of 3 concrete cave roof for full beam loss Determines single pulse accident not an issue with 3 concrete Lauten Preliminary shielding/dose estimates, August 2005 Assumed E18 pph (Webber Stage 4c parameters) Finds 185 R/hr on top of 3 concrete cave roof for full beam loss (factor of ~ 2.7 larger than normalized Vaziri number for slightly different conditions) Vaziri Provided 2.5 MeV beam stop calculations April/May 2006 Rakhno August 2006 note comparing conditions to MuCool 2003 dump design 110 MeV, 1.7E14 ppp, 2.0E18 pphr and 4E21 ppyr vs. 400MeV, 1.6E13 ppp, 3.5E17 pphr and 10E21 ppyr Concludes that Meson layout reserves sufficient volume for absorber and there are no groundwater problems Review of Proposed Operating Conditions Machine design has changed Energy at exit of first four cryomodules is now: SSR 1 cryomodule 1 : MeV SSR 1 cryomodule 2 : MeV SSR 2 cryomodule 1 : MeV SSR 2 cryomodule 2 : MeV NOT 110 MeV! Need space at end of machine for beam diagnostics Anticipated funding has changed Second SSR 2 cryomodule may be dropped Revise proposed maximum conditions 95 MeV, 1.75E14 ppp, 4.5E17/hr (95/110)^6 = shielding scaling w/energy 2/10Hz (1 hr average) = 1.26E17/6.3E18 = 0.2 max hourly rate Lautens 185 R/hr 15.3 R/hr for full beam loss If drop to 65 Mev get another (65/95)^6 = 0.10 3 Concrete Shielding - Scaling with Energy Scaling of Shielding with Energy and Thickness Target Occupancy Conditions and Proposed Solution MDB is now posted as Controlled area Consistent with normal operation at