Shielding and Radiation Effect Experiments

Nov 2, 2007
21 pages
Report number:
  • FERMILAB-PROPOSAL-0972
Experiments:

Citations per year

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    the Shielding and Radiation Effect Experiments

    • stacking operations. The total interruption in stacking operation (beam off time) for the accesses (estimated at 25) related to active counter measurements above the concrete shield for all sessions listed in the attached schedule should not exceed approximately 4 hours. 3.4 Remove irradiated samples and residual activity measurements The irradiated·samples are removed from the irradiation spots at Pbar under supervision of AD Radiation Safety Group personnel, either through penetration ducts from the air gap, or over the target-station concrete wall from the concrete shield cap. The samples are pulled by strings connected to the sample holders. This should be well arranged at the setting up stage. In case of difficult situations for this procedure, samples are taken out by accessing when beam is off. The irradiated samples are removed from irradiation spots at NuMI muon alcoves or absorber hall when access is allowed. The samples irradiated both at Pbar or NuMI are transported by a government vehicle to a counting room at HIL (High Intensity Lab.), and the gamma rays from radionuclide produced in the samples are measured by High Purity Germanium (Hp-Ge) detectors. A part of irradiated samples with low residual dose rates « 1 mremlhr) can be measured by Ge-detectors at RAF in case of sample overflow. Measurement period is approximately 2-4 weeks for each experiment. Several Ge-detectors are shipped·from JAEA and Japan. About 100 pieces of lead bricks (5xlOx20cm3 ) are loaned from PPD for shielding these Ge-detectors. MCAs (Multi-channel analyzer) are also shipped from Japan. These Ge-detectors are set up in a counting room at HIL. Liquid nitrogen should be supplied every couple of days. A total of 270 liters per week may be needed during the initial cool down of the crystals, with a use of 120 liters per week afterward
      • 3.5 Chemical analysis of irradiated sample A part of foils, water and concrete samples irradiated at Pbar or NuMI are transported by a government vehicle to a chemical laboratory at RAF, and the radionuclides produced in the samples are chemically separated. Only samples registering a contact dose rate of less than 1 mradlhr will be processed at the RAF chemistry lab and when this work does not interrupt services to the primary program. The number of samples will be limited so that the integrated dose rate remains less than 1 mradlhr at one foot from the set. The process takes 1 week for each experiment. Samples which need long term analyses are shipped to Japan
        • Kenji Ishibashi (Professor) Nobuhiro Shigyo (Assistant Professor) JASRI (Japan Synchrotron Radiation Institute) Shingo Taniguchi (Scientist) RIST,Japan Koji Niita (Head of Simulation code development group) Nikolai Mokhov (Principal Physicist, Head of Energy Deposition Group, APC) Igor Rakhno (Physicist, APC) Kamran Vaziri (Physicist, ES&H, Radiation Physics) Tony Leveling (Physicist, AD, Pbar) David Boehnlein (Physicist, PPD, Neutrino Department) Nancy Grossman (Physicist, AD, Projects) Wayne Schmitt (Radiation Physicist, PPD, ES&H Radiation Safety) Gary Lautenschlager (Radiation Physicist, AD, ES&H Radiation Safety)
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            RESPONSIBILITIES BY INSTITUTION - NON JAEA ETC. - Shipping Ge-detectors, scintillation counters, activation samples etc. from and back to Japan - Setting up for Ge-detectors, active counters, their electronic circuit, and DAQ system - Setting and removing sample to be irradiated - Measurements of gamma rays from radionuclides from irradiated sample with Ge-detector - Active counter measurements - Chemical separation process Data analysis - Provide 5 support stands for Ge-detectors (1st year)
            • Carry out an ODH Risk Assessment for the IDL. The counting area for the HIL will be set up to be Assistance making 5 Ge-detector support stands COMPUTING DIVISION Lend and maintain electronic modules & tools from PREP (See Appendix II) - Set up connection of an internet access in a counting room at IDL to observe a real-time beam status (the connection may already exist). Lend and set up a printer for data analysis in a counting room at IDL. - Provide server and backup for DocDB document database. ES&H SECTION - Assistance with safety reviews - Lend a chemical laboratory in RAF for chemical separation of irradiated samples (Only samples registering a contact dose rate of <' 1 rnrad/hr. can be processed at the Ferrnilab RAF chemistry lab and when this work does not interrupt services to the primary Ferrnilab program.) - Lend RAP Ge-detectors when available - Lend a PC, to be used for the data acquisition only - Assistance for calibration sources - Arrangement of a source storage box for calibration sources & irradiated samples in the counting rooms at HIL. - Supervise transportation of radioactive samples within the laboratory. - Assistance with shipping radioactive samples from and to Japan
              • ODH Class O.
              • 9.4 All regulations concerning radioactive sources will be followed. No radioactive sources will be carried onto the site or moved without the approval of the ES&H section. 9.5 All items in the Policy on Computing will be followed by the experimenters. C ). 9.6 The spokesperson will undertake to ensure that no PREP or computing equipment be transferred from the experiment to another use except with the approval of and through the mechanism provided by the Computing Division management. They also undertake to ensure that no modifications of PREP equipment take place without the knowledge and consent of the Computing Division management. 9.7 The experiment group will be responsible for maintaining and repairing both the electronics and the computing hardware supplied by them for the experiment. Any items for which the experiment requests that performs maintenance and repair should appear explicitly in this agreement. 9.8 At the completion of the experiment: 9.8.1 The spokesperson is responsible for the return of aU PREP equipment, computing equipment and non-PREP data acquisition electronics. If the return is not completed after a period of one year after the end of running the spokesperson of the group will be required to furnish, in writing, an explanation for any non-return. 9.8.2 The experimenters agree to remove their experimental equipment as the Laboratory requests them to. They agree to remove it expeditiously and in compliance with all ES&H requirements, including those related to transportation. All the expenses and personnel for the removal will be borne by the experimenters. 9.8.3 The experimenters will assist the Divisions and Sections with the disposition of any articles left in the offices they occupied
              • according to AD Radiation Safety. 10.3 All accesses to APO building and NuMI Absorber access ramp to remove materials require AD Radiation Safety presence at all times. Any desire to manipulate irradiated materials must be coordinated and supervised by AD Radiation Safety. 10.4 All equipment for the experiment will remain at until such equipment has been verified to be free of contamination or activation. 10.5 Calibration sources must be pre-approved by the ES&H section before they are brought on site. Isotopes and activity in Bq must be specified in the request. Sources must be secured while on site from theft or loss. Such arrangements for security of radioactive sources, and activated materials must be made prior to beginning the experiments in coordination with the Fermi Source Manager. 10.6 The counting lab at HIL must be approved by the PPD RSO and SSO. The area must meet Ferrnilab radiological and ODH requirements. Arrangements must be agreed upon prior to beginning the experiments between Accelerator Division and Particle Physics Division, with respect to chain of custody and transportation of materials. 10.7 Prior to shipment of radioactive materials to Japan, the FNAL ES&H section must receive the materials for shipping. Experimenters will provide shipping containers that meet US and International shipping requirements for radioactive materials. FNAL ES&H section must also receive licensing or equivalent documentation from recipient institution in Japan prior to shipping that recipients are authorized to receive the radioactive materials. 10.8 All radioactive chemical byproducts that may be generated by the experiment must be returned to Japan. 10.9 Chemical analysis of irradiated samples- procedures should be provided that describe the process and meet Ferrnilab approvals by RAF, ES&H
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