Based on the FNAL "Approved" procedure on https://seaquest-docdb.fnal.gov/cgi-bin/sso/ShowDocument?docid=10355
Demonstrational Video (Note: Please ignore the Steps with the "Iron Cage" as it was replaced with a storage cabinet in the very recent approved-version):
https://drive.google.com/file/d/18QMZcQo55Yr2iqhSTFtNA3yn9LO8JOMZ/view?usp=sharing
| Item # | Location | Check Item |
|---|---|---|
| 1 | Control room area | Did you read the procedure? |
| 2 | Control room area | Have you notified the Target Expert, the run coordinator, and the FNAL RCT team? Is the FNAL RCT team available to access the cave with you? Do you have NM3 and NM4 keys? |
| 3 | Control room area | Are the Gate Valve (GV), and the GV-Bypass valve closed? |
| 4 | Control room area | Is the fridge level below 20%? If not, bring it down below 20% using the annealing heat |
| 4 | Control room area | Is the target lifter in the bottom position? |
| 5 | Control room area | PPE: Do you have cryo-gloves? Are you ready with PPE level 3 (Tyvex suit, gloves, shoe covers)? |
| 6 | Control room area | Is there a Target Operator available at the counting-house during this process? Make sure that the TO has a walkie-talkie to communicate. |
| 7 | Control room area | Have you had a job briefing with everyone in the access team? |
| 8 | Material handling station | Are the cart, collar+screws, insert-handle, and two nuts for the insert-handle ready? |
| 9 | Material handling station | Do you have the wrench to disconnect the microwave? and also a 3/16 wrench in case NMR connectors are tight? There should be a plastic bag (which contains those tools) hanging on the cart. |
| 10 | On the way to NM3 | Have you turned ON the fans? |
| 11 | In-cave (before unloading) | Have you opened the two hand valves on the backfill panel? |
| 12 | In-cave (before unloading) | Do you have a banc-off flange, and an extra seal ready? |
| 13 | In-cave (before unloading) | Have you installed the insert handle, and connected the hook to the insert's eyebolt? |
| 14 | In-cave (before unloading) | Have you disconnected the microwave wave-guide and NMR cable(s) and arranged them properly? |
| 15 | In-cave (before unloading) | Have you checked the 0.5 psig relief valve's venting? |
| 16 | In-cave (after unloading) | Have you properly closed the fridge using a banc-off flange and a seal? |
| 17 | In-cave (after unloading) | Have you closed the two hand valves on the backfill panel? Have you confirmed whether the blanc-off and its seal closed the fridge properly? |
| 18 | On the way back from NM3 | Have you turned OFF the lights in the cave? |
| Item # | Location | Check Item |
|---|---|---|
| 1 | Control room area | Did you read the procedure? |
| 2 | Control room area | Have you notified the Target Expert, the run coordinator, and the FNAL RCT team? Is the FNAL RCT team available to access the cave with you? Do you have NM3 and NM4 keys? |
| 3 | Control room area | Are the Gate Valve (GV), and the GV-Bypass valve closed? |
| 4 | Control room area | Is the fridge level below 20%? If not, bring it down below 20% using the annealing heat |
| 4 | Control room area | Is the target lifter in the bottom position? |
| 5 | Control room area | PPE: Do you have cryo-gloves? Are you ready with PPE level 3 (Tyvex suit, gloves, shoe covers)? |
| 6 | Control room area | Is there a Target Operator available at the counting-house during this process? Make sure that the TO has a walkie-talkie to communicate. |
| 7 | Control room area | Have you had a job briefing with everyone in the access team? |
| 8 | Material handling station | Are the insert, cart, collar+screws, insert-handle, and two nuts for the insert-handle ready? |
| 9 | Material handling station | Do you have the wrench to disconnect the microwave? and also a 3/16 wrench in case NMR connectors are tight? There should be a plastic bag (which contains those tools) hanging on the cart. |
| 10 | On the way to NM3 | Have you turned ON the fans? |
| 11 | On the way to NM3 | Have you installed the insert handle, and connected the hook to the insert's eyebolt? |
| 12 | In-cave (before loading) | Have you opened the two hand valves on the backfill panel? |
| 13 | In-cave (before loading) | Do you have an extra seal ready? |
| 14 | In-cave (before loading) | Have you checked the 0.5 psig relief valve's venting? |
| 15 | In-cave (before loading) | Have you properly opened the fridge banc-off flange (and a seal)? |
| 16 | In-cave (after loading) | Have you closed the two hand valves on the backfill panel? Have you confirmed whether the insert-top with the seal closed the fridge properly? |
| 17 | On the way back from NM3 | Have you turned OFF the lights in the cave? |
Figure 1: LN2 tub (Vacuum Insulated). Figure 2: Target insert with stand in the LN2 tub (side view). Figure 3: Target insert with stand in the LN2 tub (front view).
Figure 5: Target transfer dewar attached to the target
Figure 6: Target insert with the eyebolt attached.
1. Bring all the equipment and tools to the work area.
2. Verify that the HVAC in the NM4 target prep area is on.
3. Put the LN2 tub on the table (Fig: 2). Make sure the long side of the table is parallel to the HVAC.
4. Arrange the tools and target material dewar so they are close and easily accessible.
5. Rope off the work area with yellow warning tape.
6. Ensure the caution label is on the LN2 tub edges (see Fig. 1). If the caution label is removed or lost, please stick it on the LN2 tub edges by making a new label from thelabel printer or contact ELO to provide.(Label: CAUTION! DO NOT TOUCH METAL WHEN COLD. MAY CAUSE INSTANT CRYO BURNS.)
7. (Person A) Fill the LN2 tub with LN2 until the level reaches the marked black line (1 inch below maximum, see Fig. 1). Throughout the procedure if the LN2 level drops to below the marked red line (see Fig. 1), we will refill the LN2 back to the marked level. (Hazard: cryogenic, Mitigation: Person A wears a Tyvek suit, cryo-apron, cryo-gloves, unvented goggles, and face shield; Person B stays away about 3 meters from the work area wearing a Tyvek suit, cryo-apron, cryo-gloves, and unvented goggles).
1. Notify the Fire Department when work is occurring in NM3 with dates activities will occur, SpinQuest contact, and primary hazards associated with the work.
• Note: Fill out the form Notification form (ESH DocDB# 7625) to notify the Fire Department copying Emergency Management and Fire Protection about planned work with Anhydrous Ammonia (NH3) in the NM3 target cave.
2. Put on radiological PPE in accordance with the job specific RWP in addition to cryogenic PPE outlined in this procedure.
3. (Person A) Remove the target canister from the target material dewar, remove thepaper stopper using the tweezer, and place the target bottles into the LN2 tub (Hazard: ammonia spill, Mitigation: Immediately evacuate according to emergency plan if ammonia spills on the ground).
4. (Person A) Pick up the unwanted bottles with the crucible tong, put them back into the canister, put back the paper stopper, and insert the canister back into the target material dewar. Person A can now remove the face-shield, Person B can now approach the work area (Hazard: cryogenic splash, Mitigation: Person A is wearing Tyvek suit, cryo-apron, cryo-gloves, unvented goggles, and face-shield, Person B stays away 3 meters from the work area wearing a Tyvek suit, cryo-apron, cryo-gloves, and unvented goggles)
5. (Person A) Use the crucible tongs to pick up the target bottle we intend to use and tap the lid to push down the material. Person A gives the target bottle to Person B to crack open the lid on the bottle and hands it over to Person A. Then, person A removes the cap while keeping the bottle soaking in LN2.
6. Person B Opens the nut on the collar of the target insert stand, puts the target insert in the target insert stand, closes the collar, and puts the nut back on it.
7. Person B adjusts the target insert to soak the target cups in the LN2 tub, removes the lid by unscrewing the screw on one side, and on the other side, loosens the screw and puts aside the lid, and tightens the screw.
8. (Person A) Place a small amount of the target material from the bottle into the empty cup, then soak the target bottle back in the LN2. Repeat this step until the target cup is full. (Hazard: ammonia spill, Mitigation: Immediately evacuate according to the emergency plan if ammonia spills on the ground).
9. (Person B) Use a Q-tip to help move the target material beads into the target cup if necessary. Once the cup is full, close the lid on the cup and tighten the screw. (Hazard: cryogenic splash, Mitigation: Person B handles this step using long tools wearing cryo glove)
10. (Person A) leave the empty target bottle in the LN2 tub.
11. Repeat steps 4, 6 to 9 to fill the two cups that we intended to fill with the target material.
12. (Person A) If some target beads are floating in the LN2 bath, use a crucible tong or strainer to fish them out and load them in the target cups.
13. (Person A) Fill the blue transfer dewar with LN2. (Hazard: cryogenic, Mitigation: Person A wears a Tyvek suit, Apron, long pants, cryo-gloves, unvented googles, and face shield; Person B stays away from the work area). After that, the face shield should be removed.
14. (person A) removes the target insert from the target insert stand.
15. (Person A) Put the target insert material end into the blue transfer dewar and hold it, while person B affixes the collar around the target inserts in the wheeled rack and installs the blue transfer dewar holder and locks it.
16. (Person A) Move the target insert and the fixtures to the insert transfer rack. Ensure the target insert handle is installed on top of the target insert.
17. Move the target rack from the target prep area in NM4 to the NM3 in front of the target cave.
18. (Person A and B) Go to cryo-platform to open PRV-410-He to 0.5 psi and MV-402 to establish Helium gas pressure at the backfill panel.
19. (Person A and B) Change the Target Cave ODH fan control from “AUTO” to “ON” before entering NM3. Put a configuration lock and a sign that says “Target cave work in progress, DO NOT turn off” on the control knob cage.
20. After entering NM3, by the gate hold to change PPE if beam has been run. Replace cryogenic PPE worn in NM4 with a set used for NM3 to minimize contamination as directed by the supervising RCT.
1. If present in beam conditions, RCT(s) enter the target cave and take surveys and contamination wipes. Then, instruct workers A and B on conditions and requirements before they proceed. RCTs remain present in NM3 outside of the target cave to provide coverage as needed.
2. Check that both the curtain and ducted fans come on. Do not proceed with the rest of the procedure if one or more fans are not running. (Hazard: noise, Mitigation: Person A and B wear noise dosimeter due to localized high noise hazard around NM3 cave fans. After work is complete IH will read dosimetry results and advise on any necessary administrative controls for the remainder of the work shift).
3. In the event of an ammonia spill in the cave, persons A and B follow Emergency Response Scenario #5.
4. (Person A) Climb ladder into target cave. (Hazard: fall hazard, Mitigation: Maintain 3 points of contact on ladder at all times.)
5. (Person A) Perform a visual inspection of the jib crane rope to ensure there is no damage or degradation from radiation before use.
6. Person A and B put on hard hats while operating the jib crane and with a load attached.
7. (Person A) Move the jib crane out of the target cave and lower it to the floor.
8. (Person B) Remove the insert from the transfer rack, attach the insert handle eyebolt to the jib crane, hold the insert until person A starts pulling, then move away from the insert/dewar about 3 meters while it is being lifted overhead.
9. (Person A) Keep pulling the insert into the target cave, and hold the target insert. (Hazard: cryogen spillage, Mitigation: person B stays far away, 3 meters from the insert. Person A and B are wearing a Tyvek suit, cryo-apron, cryo-gloves, and unvented goggles, and hard hat)
10. After the insert is pulled into the cave, person B should go to the cave to assist person A. (Hazard: fall hazard, Mitigation: Maintain 3 points of contact on ladder at all times.)
11. (Person B) Open the valve ‘Fridge backfill’ on the backfill panel and check the manual pressure gauge in the backfill panel to ensure fridge pressure is about 0.5 psi above the atmosphere and confirm slight flow from the check valve CV-104-HE.
12. (Person B) Open the fridge laddish clamp and remove the blank laddish flange.
13. (Person A) Move the target insert slightly above the fridge so that person B can disconnect the blue transfer dewar and move it to the side.
14. (Person A) Lower the insert into the fridge until it is fully in place. (Hazard: ammonia sublimation, Mitigation: Immediately evacuate according to the Emergency Response Plan #5 if ammonia sublimates or the ammonia alarm triggers).
15. (Person B) Install the laddish clamp and affix.
16. (Person B) Close the valve ‘Fridge backfill’ on the backfill panel.
17. Connect microwave waveguides, NMR lines, and other electronic sensors.
18. (Person A) Attach the jib crane to the handle of the blue transfer dewar, and carefully lower it to the NM3 floor. (Hazard: cryogen spillage, Mitigation: both workers stay in the target cave)
19. Under beam conditions: After work in the target cave is complete all workers go near the NM3 enclosure door to frisk and change back into NM4 cryo PPE as instructed by the RCTs providing coverage and the job specific RWP.
20. (Person A) Hand-carry the blue transfer dewar from NM3 back to NM4 target prep area against the HVAC and let the LN2 evaporate.
21. (Person B) Move the transfer rack from NM3 back to the NM4 target prep area and place the blue transfer dewar in front of the HVAC to let it evaporate.
22. (Person A and B) Go to cryo-platform to close MV-402 and PRV-410-He.
23. (Person A and B) Remove the configuration lock and the sign on the control knob cage. Change the Target Cave ODH fan control from “ON” to “AUTO.”
24. Notify the Fire Department after completing the procedure, copying Emergency Management, ELO, Division Safety Officer, and Fire Department.
25. Worker A and B return noise dosimeters to IH staff to read results and determine and administrative controls necessary for the remainder of the work shift.
Perform Setting up the Work Area steps, 1-6, before proceeding with procedure.
1. Notify the Fire Department when work is occurring in NM3 with dates activities will occur, SpinQuest contact, and primary hazards associated with the work.
• Note: Fill out the form (Notification form) (ESH DocDB# 7625) to notify the Fire Department copying Emergency Management and Fire Protection about planned work with Anhydrous Ammonia (NH3) in the NM3 target cave.
2. (Person A and B) Go to cryo-platform to open PRV-410-He to 0.5 psi and MV-402 to establish Helium gas pressure at the backfill panel.
3. (Person A and B) Change the Target Cave ODH fan control from “AUTO” to “ON” before entering NM3. Put a configuration lock and a sign that says “Target cave work in progress, DO NOT turn off” on the control knob cage.
4. Put on radiological PPE in accordance with the job specific RWP in addition to cryogenic PPE outlined in this procedure. Put on the cryogenic PPE specific for NM3 once inside the NM3 enclosure by the gate when in beam conditions.
5. If present in beam conditions, RCT(s) enter the target cave and take surveys and contamination wipes. Then, instruct workers A and B on conditions and requirements before they proceed. RCTs remain present in NM3 outside of the target cave to provide coverage as needed.
6. Check that both the curtain and ducted fans come on. Do not proceed with the rest of the procedure if one or more fans are not running. (Hazard: noise, Mitigation: Person A and B wear noise dosimeter due to localized high noise hazard around NM3 cave fans. After work is complete IH will read dosimetry results and advise on any necessary administrative controls for the remainder of the work shift).
7. In the event of an ammonia spill in the cave, persons A and B follow Emergency Response Scenario #5.
8. (Person A) Fill the blue transfer dewar with LN2 using DocDB# 10358 and bring all equipment to NM3 (target insert, target insert wheeled rack, blue transfer dewar)
(Hazard: cryogenic, Mitigation: Person A is wearing Tyvek coat, long pants, cryo-gloves, unvented goggles, and face-shield, Person B stays away 3 meters from the work area wearing a Tyvek suit, cryo-apron, cryo-gloves, and unvented goggles). After that, the face shield should be removed.
9. (Person A) Climb the ladder into the cave. (Hazard: fall hazard, Mitigation: Maintain 3 points of contact on ladder at all times.)
10. (Person A) Perform a visual inspection of the jib crane rope to ensure there is no damage or degradation from radiation before use.
11. Person A and B put on hard hats while operating the jib crane and with a load attached.
12. (Person A) Move the jib crane out of the target cave and lower it to the floor.
13. (Person B) Attach the handle of the blue transfer dewar to the jib crane and hold it until Person A begins pulling. Then move about three meters away from the dewar
while it is being lifted overhead.
14. (Person A) Keep pulling the blue transfer dewar into the target cave and hold the dewar. (Hazard: cryogen spillage, Mitigation: person B stays 3 meters away from the dewar wearing a Tyvek suit, cryo-apron, cryo-gloves, hard hat and unvented goggles)
15. After the blue transfer dewar is pulled into the cave, person B should go to the cave to assist person A.
16. (Peron A and B) Disconnect microwave waveguides, NMR lines, and other electrical connections.
17. (Person A) Attach the eyebolt to the insert and connect the jib crane to the eyebolt.
18. (Person B) Open the valve ‘Fridge backfill’ on the backfill panel and check the manual pressure gauge in the backfill panel to ensure fridge pressure is about 0.5 psi above the atmosphere and confirm slight flow from the check valve CV-104-HE. 19. (Person B) Open the laddish flange clamp and take off the flange.
20. (Person A) Slowly pull the insert out of the fridge using the jib crane system, guide with a hand if necessary.
21. While target insert is being removed in beam conditions RCTs positioned at the bottom of the stairs will use a telescoping meter to monitor dose levels.
22. (Person A) Once the insert is fully out, quickly put the material end into the blue transfer dewar within 10 seconds. (Hazard: ammonia sublimation, Mitigation: Immediately evacuate according to the Emergency Response Plan #5 if ammonia sublimates or the ammonia alarm triggers).
23. (Person B) Put the laddish flange and clamp back on the fridge.
24. (Person B) Close the valve ‘Fridge backfill’ on the backfill panel.
25. (Person B) Attach the blue transfer dewar holder to the insert.
26. (Person B) Climb out of the cave to the floor, but stay away from the area of about 3 meters where the target insert is hanging above. (Hazard: fall hazard, Mitigation: Maintain 3 points of contact on ladder at all times.)
27. (Person A) Lower the target insert from the cave to the floor. (Hazard: cryogen spillage, Mitigation: person B stays far away, 3 meters from the insert)
28. (Person B) Remove the collar on the transfer rack by unscrewing the bolts.
29. (Person B) Detach the jib crane and move the target insert along with the transfer dewar to the transfer rack and put back the collar and screws the bolts.
30. (Person A) Pull the jib crane up, then leave the target cave to join Person B. (Hazard: fall hazard, Mitigation: Maintain 3 points of contact on ladder at all times.)
31. Person A and B may now remove hard hats.
32. Under beam conditions: RCTs preform surveys of the target insert.
33. Under beam conditions: After work in the target cave is complete all workers go near the NM3 enclosure door to frisk and change back into NM4 cryo PPE as instructed by the RCTs providing coverage and the job specific RWP.
34. (Person A and B) Move the target insert rack from NM3 to the target prep area in NM4.
35. (Person A and B) Go to cryo-platform to close MV-402 and PRV-410-He.
36. (Person A and B) Remove the configuration lock and the sign on the control knob cage. Change the Target Cave ODH fan control from “ON” to “AUTO” after leaving NM3.
37. (Person B) Opened the nut on the collar of the target insert stand, put the target insert in the target insert stand, closed the collar, and put the nut back on it.
38. (Person A) put the blue transfer dewar in front of the HVAC to let it evaporate.
39. (Person B) adjusts the target insert to soak the target cups in the LN2 tub, remove the lid by unscrewing the screw on one side and on the other side, loose the screw and puts aside the lid, and tighten the screw. Make sure not to keep out the insert for more than 20 seconds.
40. (Person A) Remove the target canister from the target material dewar, remove the paper stopper using the tweezer, and place the target bottles into the LN2 tub (Hazard: ammonia spill, Mitigation: Immediately evacuate according to emergency plan if ammonia spills on the ground).
41. (Person A) Pick up the unwanted bottles with the crucible tong, put them back into the canister, put back the paper stopper, and insert the canister back into the target material dewar. Person A can now remove the face-shield, Person B can now approach the work area (Hazard: cryogenic splash, Mitigation: Person A is wearing Tyvek suit, cryo-apron, cryo-gloves, unvented goggles, and face-shield, Person B stays away 3 meters from the work area wearing a Tyvek suit, cryo-apron, cryo-gloves, and unvented goggles)
42. (Person A) Use the crucible tongs to Pick up the target bottle we intend to use to take the material from the target cups. Remove the cap from the empty bottle, screw the funnel on the bottle, and soak it into the LN2 tub to pre-cool.
43. (Person B) Loosen the nut on the collar to rotate the target insert, and loosen the nut on the stand to adjust the height of the target insert up and down before unloading the target material from the target cups into the target storage bottles. Ensure that the nut on the collar is not removed.
44. (Person B) Place a small amount of the target material from the cup into the empty bottle, then soak the target cups back in the LN2. Repeat this step until the target bottle is full. (Hazard: ammonia spill, Mitigation: Immediately evacuate according to the emergency plan if ammonia spills on the ground).
45. (Person A) Use a Q-tip to help move the target material beads into the target bottle from the funnel if necessary. Once the bottle is full, close the cap on the bottle. (Hazard: cryogenic splash, Mitigation: Person A handles this step using long tools wearing cryo glove)
46. (Person A) leave the filled target bottle in the LN2 tub.
47. Repeat steps 42 to 46 to fill the two bottles that we intended to fill with the target material.
48. (Person A) If some target beads floated in the LN2 bath, use a crucible tong or strainer to fish them out and load them in the target bottles.
49. (Person B) can remove the empty insert from the LN2 tub, hang it on the wheeled rack, and place the collars around it.
50. If the target material has been irradiated in the beam proceed to procedure 10735 to package the material for shipment.
51. If the material has not been irradiated (Person A) Remove the target canister from the target material dewar, remove the paper stopper, put the target bottles back in the canister, put the paper stopper back in, and put the canister back in the target material dewar.
52. Leave the LN2 tub in the area until all LN2 evaporates (it takes about 30-40 minutes). Keep the no-entry fence tape until the LN2 is completely gone.
53. In beam conditions RCTs perform wipes and surveys of the work space and tools
54. Workers removes PPE and frisk in accordance with the job specific RWP and under RCT guidance in beam conditions.
55. Notify the Fire Department and copying Emergency Management, ELO, Division Safety Officer and Fire Protection after completing the procedure.
56. Worker A and B return noise dosimeters to IH staff to read results and determine and administrative controls necessary for the remainder of the work shift.