Standard Operating Procedure (SOP) for loading AMS targets for Beryllium and Aluminum

Transcription

1 Standard Operating Procedure (SOP) for loading AMS targets for Beryllium and Aluminum #1 General Process Description This SOP describes the handling and loading of targets that will be sent to an AMS. All work described in this SOP will have to conducted in Mitchell A20. Contact Principal Investigator (PI): Prof. George E. Hilley for more information or (650) ). This SOP is from 4/16/2007. #2 Hazardous Chemicals/Class of Hazardous Chemicals We are working with Beryllium oxide. BeO is a white crystalline oxide and has ceramic characteristic. BeO is carcinogenic if the powder is ingested or inhaled and may cause chronic beryllium disease. It thus poses a serious health hazard. Al2O3 has similar chemical characteristics as BeO, but is not toxic. However, it may more difficult to work with, as it is harder than BeO. #3 Personal Protective Equipment (PPE) Before working with BeO and Al2O3 ensure that you will at least meet the following protective requirements: 1. goggles (prescription glasses are not enough!) 2. nitril gloves 3. closed-toe shoes with socks 4. long pants (no shorts!) 5. lab coat 6. Glove box (all targets are loaded within the glove box) All grinding work and loading of BeO and Al2O3 has to be done in the glove box.

2 All Material Safety Data Sheets (MSDS) are located in the red folder in the storage cabinet opposite of the dishwasher under the vertical laminar flow unit. #4 Engineering / Ventilation Controls All grinding work and loading of BeO and Al2O3 has to be done in the glove box. Make sure that the glove box is closed and only hand in the quartz vials through the air lock. Turn on the blower when you loaded all the samples all particles containing BeO are then sucked into the filter and the air within the glove box remains clean. #5 Special Handling Procedures and Storage Requirements The glove box will be stored at a safe place when not in used. After each day, ensure that you ve wiped the interior of the glove box with Acteone and kimwipes and put the kimwipes into the properly labeled hazardous waste bag. Activities that potentially aerosolize BeO may only be conducted in containment (e.g., glovebox). When handling BeO outside of containment, keep in sealed containers. If any equipment comes into contact with Berylliumoxid (BeO), review step 10 Decontamination. #6 Spill and Accident Procedures There are no acids used in this SOP. However, if you came into contact with BeO or you believe, you ve inhaled BeO contact a doctor immediately. Thoroughly flush with water any potential areas that may have come into contact with BeO. View the last page of the SOP for emergency notifications. #7 Waste Disposal All Kimwipes that have been used inside the glove box must be collected in a separate bag labeled with a Stanford Hazardous Waste tag as soon as it is collected. Submit pickup request on line to EH&S at #8 Training requirements 2

3 Prior to entering and working in the laboratory, you must have completed the EHS-4200 General Safety Training and EHS-1900 Chemical Lab Safety. You will have to retain training documentation for at least one year. Any person conducting work in Mitchell A20 using this SOP must receive training. #9 Approval Required All research staff must get initial PI approval prior to starting work with BeO. #10 Decontamination Wipe all tools used inside the glove box with Kimwipes and Acetone and put the Kimwipes in the specially dedicated plastic bag. Keep bag tightly closed to prevent evaporation. Decontaminate all items before they are removed from the fume hood or glove box. #11 Designated Area Berylliumoxid is used only in the fume hood and glove box. When Berylliumoxid is being handled, affix sign to fume hood or Lab Door saying: Warning: Berylliumoxid in Use Authorized Personnel Only. Remove the sign, after the fume hood has been decontaminated. Grinding BeO and loading AMS target must be conducted in the glove box. Ensure that the glove box is labeled: Warning: For Beryllium Use Only Only Authorized Users. Upon leaving a designated work area, remove any personal protective equipment worn and wash hands, forearms, face, and neck. After each use (or day), wipe down the immediate work area and equipment to prevent accumulation of chemical residue. At the end of each project, thoroughly decontaminate the designated area before resuming normal laboratory work in the area. 3

4 #12 Precise Process Description 1. Verify that emergency eyewash/shower is accessible and tested within last month. 2. Check the integrity of all connections and gloves of the glove box prior to any work in the glove box. Check glove box owner s manual for guidance on proper use and inspection. 3. It is essential that all grinding and loading work is done within the glove box. 4. Take the BeO in its holding rack and place it inside the glove box through the air lock. Make sure that you have precisely weighted and recorded the weight of all vials (done in the previous step). 5. Remove the outer quartz vial and place in the plastic bucket within the glove box. Use tweezers to remove the inner vial. The outer quartz vials will be cleaned in Nitric Acid and may be reused. 6. The inner vial contains the BeO/Al2O3. Put it in the Aluminum holding block and grind with the drill gauge for several minutes (5 to 10 minutes). 7. Grind BeO/Al2O3 until in a fine-grained state. Note: Al2O3 is much harder than BeO and may need longer grinding. 8. Add Silver powder to the grinded Al2O3 and Niobium powder to BeO. Add by weight. Grind for several more minutes until well mixed. 9. Grind all samples and mix with Silver/Niobium. Put back into the holding block and weigh all vials. Record weight and determine Oxide to Metal ratios. 10. Clean working space carefully after every grinded sample with Kimwipes and Acetone. All Kimwipes used inside the glove box will go into the plastic bag labeled BeO waste (with a Stanford Hazardous Waste tag). 11. Carefully pour a part of the BeO-Niobium/Al2O3-Silver mixture into the AMS target. Use the drill gauge and 4

5 hammer to put material fully into the AMS target. You will need only a fraction of the material. 12. The rest of the BeO-Niobium/Al2O3-Silver mixture goes into a labeled plastic vial. Save this material in case more measurements are needed. 13. Put target into its plastic container. The target is now sealed and can be transported to the AMS measuring facility. 14. When all samples have been loaded, wipe all items in the glove box with Acetone and Kimwipes. All Kimwipes used inside the glove box will go into the plastic bag labeled BeO waste (with a Stanford Hazardous Waste tag). 15. Remove all items from the glove throught the air lock. 16. Clean the glove box with Acetone and Kimwipes. All Kimwipes used inside the glove box will go into the plastic bag labeled BeO waste (with a Stanford Hazardous Waste tag). Initiate a pick up from EH&S at Turn on the vacuum system of the glove box. This helps to remove Berylliumoxid particles that are airborne inside the glove box IMPORTANT: This does not ensure complete decontamination of glove box interior. 5

6 Laboratory Spill Response Procedures Health Threatening Situation - In the event of an imminent or actual health-threatening emergency (threatening local or public health, safety, or welfare; or the environment outside the immediate area): 1) CALL FOR THE FIRE DEPARTMENT REMAIN IN THE AREA TO ADVISE RESPONDERS. 2) ACTIVATE LOCAL ALARM SYSTEMS 3) Once personal safety is established, call EH&S at and proceed with local notifications, below. Non-Health Threatening Situation In the event of a spill or release which may or has impacted the environment (storm drain, soil, air outside the building) or spill or release that cannot be cleaned up by local personnel: 1) Notify Stanford Responders: call (24 hours/day, 7 days/week), then 2) Provide local notifications: Name Phone Number Cell or Pager Title George E. Hilley Principal Investigator Bodo Bookhagen (415) Lab Manager Felicia Morales Lab Safety Coordinator Local Response Situation In the event of a minor spill or release that can be cleaned up by local personnel using readily available equipment (absorbent, available from EH&S in Small Spill Kit): 1) Notify personnel in the area and restrict access. Eliminate all sources of ignition. 2) Wear gloves and protective eyewear. Clean up using absorbent. Put the contaminated absorbent in a labeled hazardous waste container. 3) If greater than 30 ml, or cleanup takes longer than 15 minutes, make a record in your lab inspection report, or call EH&S at to record the spill, and notify your supervisor. 4) Submit online waste pickup request to EH&S at: wastepickup.stanford.edu 6

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