RPM Neutron Detector Helium-3 (He3) Tube Replacement

Last Updated: 04/23/2025 1:42 AM

The following table lists all the components that make up the document.

Title Type Status Last Updated
Rapiscan PM-700 Pedestrian Monitor
Device
Published
06/20/2024 11:38 AM
Rapiscan VM-250 Vehicle Monitor
Device
Published
10/14/2024 9:50 AM
Rapiscan TM-850 Rail Monitor
Device
Published
09/18/2024 10:28 AM
7621 - 1401 - Establish Initial Conditions; Remark:
Procedure Step
Published
06/29/2023 5:37 PM
1401 - Establish Initial Conditions
Instruction
Published
09/30/2022 3:14 PM
7268 - 7231 - Close lane; Remark:7233
Procedure Step
Published
04/27/2023 7:01 PM
9053 - Warning : Traffic should temporarily be rerouted or halted during conduction of this pr...
Annotation
Published
09/27/2023 9:09 AM
7231 - Close lane
Instruction
Published
04/18/2023 1:00 PM
7233 - Use orange safety (traffic control) cones to setup barriers. Practice establi...
Remark
Published
04/24/2023 12:18 PM
7269 - 7232 - Open RPM door; Remark:7234
Procedure Step
Published
04/27/2023 7:02 PM
7232 - Open RPM door
Instruction
Published
04/18/2023 1:02 PM
7234 - Open all doors needed to access components.
Remark
Published
04/19/2025 7:48 PM
7454 - 7290 - Disable tamper switches; Remark:7416
Procedure Step
Published
06/02/2023 5:25 PM
7290 - Disable tamper switches
Instruction
Published
05/01/2023 8:14 AM
7416 - Use a magnet to disable tamper switches for all open doors. Use adhesive tape...
Remark
Published
06/02/2023 1:18 PM
8561 - 7291 - Disable both infrared occupancy sensors; Remark:8514
Procedure Step
Published
09/18/2023 12:05 AM
5291 - Note : It is good practice to verify all cables and connectors are labeled prior to ...
Annotation
Published
10/24/2022 8:35 AM
7291 - Disable both infrared occupancy sensors
Instruction
Published
05/01/2023 8:15 AM
8514 - Verify sensors mounted in control pillar door are receivers.
Remark
Published
09/29/2023 11:52 AM
9205 - To disconnect sensor cable, turn collar counterclockwise and pull away from s...
Remark
Published
09/29/2023 11:52 AM
8221 - 7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...; Remark:
Procedure Step
Published
09/01/2023 9:26 PM
7676 - Brief system operators on expected work, duration, anticipated alarms, and fa...
Instruction
Published
07/01/2023 11:39 PM
8591 - 8515 - Uninstall Faulty Neutron Tube; Remark:
Procedure Step
Published
09/18/2023 12:10 AM
8515 - Uninstall Faulty Neutron Tube
Instruction
Published
09/17/2023 7:24 PM
8562 - 8516 - Disconnect cable from faulty helium-3 (He3) tube; Remark:8517
Procedure Step
Published
09/17/2023 10:38 PM
8516 - Disconnect cable from faulty helium-3 (He3) tube
Instruction
Published
09/17/2023 7:25 PM
8517 - Push toward connection, turn coupling nut counterclockwise, and pull away fro...
Remark
Published
09/17/2023 7:30 PM
8563 - 8518 - Remove four (4) front panel screws; Remark:8519
Procedure Step
Published
09/17/2023 10:39 PM
8518 - Remove four (4) front panel screws
Instruction
Published
09/17/2023 7:32 PM
8519 - Use a large Phillips (PH3) screwdriver. There should be four (4) screws, but ...
Remark
Published
09/17/2023 7:37 PM
8564 - 6748 - Remove front panel; Remark:
Procedure Step
Published
09/17/2023 10:39 PM
6748 - Remove front panel
Instruction
Published
12/09/2022 3:49 PM
8565 - 8520 - Remove stabilizing brace screws; Remark:8521
Procedure Step
Published
09/17/2023 10:40 PM
8520 - Remove stabilizing brace screws
Instruction
Published
09/17/2023 7:40 PM
8521 - There should be two stabilizing braces for each He3 tube; configurations migh...
Remark
Published
09/17/2023 7:45 PM
8566 - 8523 - Loosen bracket screw (if applicable); Remark:8525
Procedure Step
Published
09/17/2023 10:42 PM
8522 - Caution : Tube may fall out of detector assembly when bracket screw is removed.
Annotation
Published
09/17/2023 7:59 PM
9605 - Note : This step is only needed if cleaning He3 tube from upper detector.
Annotation
Published
04/13/2025 6:03 PM
8523 - Loosen bracket screw (if applicable)
Instruction
Published
09/17/2023 8:00 PM
8525 - If there is more than one screw, completely remove one. Use medium Phillips (...
Remark
Published
09/29/2023 12:12 PM
8567 - 8526 - Rotate bracket (if applicable); Remark:8527
Procedure Step
Published
09/17/2023 10:43 PM
8526 - Rotate bracket (if applicable)
Instruction
Published
09/17/2023 8:13 PM
8527 - Rotate neutron bracket
Remark
Published
04/13/2025 5:58 PM
8568 - 8528 - Remove He3 tube; Remark:8529
Procedure Step
Published
09/17/2023 10:44 PM
8528 - Remove He3 tube
Instruction
Published
09/17/2023 8:24 PM
8529 - Slide tube up through hole and then pull out of moderator.
Remark
Published
04/13/2025 6:11 PM
8569 - 8530 - Remove stabilizing braces; Remark:8531
Procedure Step
Published
09/17/2023 10:45 PM
8530 - Remove stabilizing braces
Instruction
Published
09/17/2023 8:31 PM
8531 - Slide stabilizing braces off He3 tube.
Remark
Published
09/17/2023 8:32 PM
3397 - 3395 - Label faulty component; Remark:3396
Procedure Step
Published
07/21/2024 6:59 AM
3395 - Label faulty component
Instruction
Published
08/07/2021 11:07 AM
3396 - Use tag or tape. Include date of removal, description of failure symptoms, co...
Remark
Published
08/09/2021 11:35 AM
8571 - 8533 - Install New He3 Tube; Remark:
Procedure Step
Published
09/17/2023 10:46 PM
8533 - Install New He3 Tube
Instruction
Published
09/17/2023 8:43 PM
8572 - 8534 - Place stabilizing braces onto new He3 tube; Remark:
Procedure Step
Published
09/17/2023 10:47 PM
8534 - Place stabilizing braces onto new He3 tube
Instruction
Published
09/17/2023 8:44 PM
8573 - 8535 - Insert new He3 tube into moderator; Remark:
Procedure Step
Published
09/17/2023 10:48 PM
8535 - Insert new He3 tube into moderator
Instruction
Published
09/17/2023 8:46 PM
8574 - 8526 - Rotate bracket (if applicable); Remark:8536
Procedure Step
Published
09/17/2023 10:48 PM
8536 - Rotate He3 tube bracket
Remark
Published
09/17/2023 8:48 PM
8575 - 8537 - Tighten bracket screw (if applicable); Remark:8538
Procedure Step
Published
09/17/2023 10:49 PM
8537 - Tighten bracket screw (if applicable)
Instruction
Published
09/17/2023 8:50 PM
8538 - Use medium Phillips (PH2) screwdriver.
Remark
Published
09/17/2023 8:51 PM
8576 - 8539 - Reinstall stabilizing braces screws; Remark:8540
Procedure Step
Published
09/17/2023 10:50 PM
8539 - Reinstall stabilizing braces screws
Instruction
Published
09/17/2023 8:53 PM
8540 - Use medium Phillips (PH2) screwdriver.
Remark
Published
09/17/2023 8:54 PM
8577 - 8541 - Reinstall front panel with four (4) screws; Remark:8542
Procedure Step
Published
09/17/2023 10:51 PM
8541 - Reinstall front panel with four (4) screws
Instruction
Published
09/17/2023 8:56 PM
8542 - Use large Phillips (PH3) screwdriver.
Remark
Published
09/17/2023 8:59 PM
8578 - 8543 - Reconnect cable to He3 tube; Remark:8544
Procedure Step
Published
09/17/2023 10:52 PM
5553 - Caution : Correct placement of connectors and wiring is critical to proper operation.
Annotation
Published
10/28/2022 2:19 PM
8543 - Reconnect cable to He3 tube
Instruction
Published
09/17/2023 9:01 PM
8544 - Rotate to align connector notches. Push toward connection and turn coupling n...
Remark
Published
09/17/2023 9:05 PM
7279 - 7249 - Return equipment to normal operating condition; Remark:
Procedure Step
Published
04/27/2023 4:13 PM
7249 - Return equipment to normal operating condition
Instruction
Published
04/08/2025 3:22 PM
7280 - 7250 - Power on RPM; Remark:7251
Procedure Step
Published
04/27/2023 4:14 PM
7250 - Power on RPM
Instruction
Published
05/01/2023 8:31 AM
7251 - Move LD-260 switch to ON position. The LED PWR ON
Remark
Published
05/10/2023 3:14 PM
7281 - 7252 - Verify RPM start-up; Remark:7253
Procedure Step
Published
04/20/2025 3:26 PM
7252 - Verify RPM start-up
Instruction
Published
04/27/2023 2:23 PM
7253 - RPM will perform a power on self-test (POST) and collect a background radiati...
Remark
Published
05/10/2023 3:14 PM
7282 - 7254 - Confirm network connection; Remark:7255
Procedure Step
Published
04/27/2023 4:15 PM
7254 - Confirm network connection
Instruction
Published
04/27/2023 2:22 PM
7255 - Contact operators to confirm communications have been reestablished between RPM ...
Remark
Published
05/10/2023 3:15 PM
8579 - 8545 - Isolate new He3 tube; Remark:8547
Procedure Step
Published
09/17/2023 10:53 PM
8546 - Caution : Do not disconnect cable from new tube
Annotation
Published
09/17/2023 9:17 PM
8545 - Isolate new He3 tube
Instruction
Published
09/17/2023 9:16 PM
8547 - Disconnect cables from all He3 tubes in moderator (white box) except
Remark
Published
09/17/2023 9:19 PM
8580 - 8548 - Navigate to SHOW COUNTS for neutron channels; Remark:8549
Procedure Step
Published
09/17/2023 10:57 PM
8548 - Navigate to SHOW COUNTS for neutron channels
Instruction
Published
09/17/2023 9:22 PM
8549 - On SC-770, press 01234# Then, press 2:
Remark
Published
09/17/2023 9:26 PM
8581 - 8550 - Place neutron source on neutron detector; Remark:8551
Procedure Step
Published
09/17/2023 10:57 PM
8550 - Place neutron source on neutron detector
Instruction
Published
09/17/2023 9:28 PM
8551 - Secure source to middle of detector with adhesive tape.
Remark
Published
09/17/2023 9:31 PM
8582 - 9606 - Verify counts from cleaned He3 tube; Remark:8553
Procedure Step
Published
09/17/2023 10:58 PM
9606 - Verify counts from cleaned He3 tube
Instruction
Published
10/11/2023 11:33 AM
8553 - Neutron counts will increase on the channel with the new He3 tube
Remark
Published
09/17/2023 9:34 PM
8583 - 2581 - Remove radioactive source; Remark:
Procedure Step
Published
09/17/2023 11:00 PM
2581 - Remove radioactive source
Instruction
Published
08/11/2021 3:52 PM
8584 - 8458 - Exit programming mode; Remark:8554
Procedure Step
Published
09/17/2023 11:00 PM
8458 - Exit programming mode
Instruction
Published
09/15/2023 4:21 PM
8554 - On SC-770, press # button until main controller screen is di...
Remark
Published
09/17/2023 9:40 PM
8585 - 8555 - Reconnect all neutron detectors; Remark:8556
Procedure Step
Published
09/17/2023 11:01 PM
8555 - Reconnect all neutron detectors
Instruction
Published
09/17/2023 9:53 PM
8556 - Connecting neutron cable
Remark
Published
09/17/2023 9:55 PM
8586 - 8557 - Perform functional compliance test; Remark:8558
Procedure Step
Published
09/17/2023 11:02 PM
8557 - Perform functional compliance test
Instruction
Published
09/17/2023 10:00 PM
8558 - DET-RPM-RAP-RM05, RPM Functional Compliance Test.
Remark
Published
09/17/2023 10:02 PM
8588 - 7305 - Enable both infrared occupancy sensors; Remark:8559
Procedure Step
Published
09/17/2023 11:04 PM
7305 - Enable both infrared occupancy sensors
Instruction
Published
05/01/2023 8:33 AM
8559 - To reconnect sensor cable, align connectors, push towards sensor, and turn co...
Remark
Published
09/29/2023 12:05 PM
8589 - 7310 - Enable tamper switches; Remark:7348
Procedure Step
Published
09/17/2023 11:07 PM
7310 - Enable tamper switches
Instruction
Published
05/01/2023 8:36 AM
7348 - Remove all magnets and/or adhesive tape from door switches.
Remark
Published
09/17/2023 10:23 PM
7283 - 7256 - Close and lock all RPM doors; Remark:
Procedure Step
Published
09/01/2023 11:45 PM
7256 - Close and lock all RPM doors
Instruction
Published
04/27/2023 2:21 PM
7842 - 7820 - Inform system operators upon completion of maintenance action; Remark:
Procedure Step
Published
07/07/2023 11:15 PM
7820 - Inform system operators upon completion of maintenance action
Instruction
Published
07/07/2023 10:02 PM
322 - 321 - Document maintenance actions; Remark:
Procedure Step
Published
06/17/2021 9:49 AM
321 - Document maintenance actions
Instruction
Published
04/21/2025 11:19 AM
2869 - 2585 - Document maintenance performed; Remark:2866
Procedure Step
Published
06/18/2021 5:58 PM
2585 - Document maintenance performed
Instruction
Published
07/09/2021 12:15 PM
2866 - Record observations, times, and results for the maintenance report.
Remark
Published
04/21/2025 11:39 AM
4706 - 4705 - Submit report; Remark:4864
Procedure Step
Published
06/29/2022 9:50 AM
4705 - Submit report
Instruction
Published
06/29/2022 9:50 AM
4864 - As specified by management or contractual obligations.
Remark
Published
07/28/2022 1:36 PM
Corrective Maintenance Procedure
Document Type
Published
03/02/2020 3:32 PM
minutes
Duration
Published
05/26/2022 11:41 AM
Upon failure of neutron detector He3 tube
Frequency
Published
09/17/2023 11:37 PM
Warning
Annotation Type
Published
03/02/2020 3:25 PM
Note
Annotation Type
Published
03/02/2020 3:25 PM
Caution
Annotation Type
Published
03/02/2020 3:24 PM
Technician 2
Skill Level
Published
04/09/2020 1:17 AM
Keys to access RPM
Replacement Parts
Published
04/27/2023 6:56 PM
Magnets and adhesive tape to disable door tamper switches
Replacement Parts
Published
06/02/2023 10:08 PM
Medium Phillips (PH2) screwdriver
Tools
Published
04/24/2020 4:40 PM
Large Phillips (PH3) screwdriver
Tools
Published
09/17/2023 11:37 PM
Ladder: 2 meters, 6 feet tall; non-conducting
Replacement Parts
Published
09/01/2023 9:34 PM
Orange/yellow safety vest
Replacement Parts
Published
04/27/2023 6:56 PM
Safety shoes
Replacement Parts
Published
04/27/2023 6:56 PM
Gloves
Replacement Parts
Published
05/10/2023 3:28 PM
Protective headwear: glasses, hard hat
Replacement Parts
Published
05/10/2023 3:31 PM
Orange traffic cones
Replacement Parts
Published
04/27/2023 6:56 PM
Disable tamper switch
படம்
Published
09/07/2023 8:22 PM
Disable Tamper Switch
படம்
Published
06/02/2023 2:28 PM
Infrared Receiver
படம்
Published
09/17/2023 7:09 PM
Infrared Receiver DC
படம்
Published
09/29/2023 11:47 AM
Infrared Disconnect Sensor Cable
படம்
Published
09/17/2023 7:11 PM
Infrared Sensor Disconnect
படம்
Published
09/17/2023 7:12 PM
Neutron Connector Removal
படம்
Published
09/17/2023 7:28 PM
Neutron Panel Screws
படம்
Published
09/17/2023 7:36 PM
Neutron Brace
படம்
Published
09/17/2023 7:45 PM
Loosen Neutron Bracket
படம்
Published
09/17/2023 7:53 PM
Loosen Neutron Bracket
படம்
Published
09/17/2023 7:54 PM
Rotate Neutron Bracket_1
படம்
Published
09/17/2023 7:56 PM
Rotate Neutron Bracket
படம்
Published
09/17/2023 7:57 PM
Remove He3 Tube
படம்
Published
09/17/2023 8:22 PM
Pull He3 Tube
படம்
Published
09/17/2023 8:23 PM
Remove He3 Tube Braces
படம்
Published
09/17/2023 8:29 PM
Return Rotated Neutron Bracket
படம்
Published
09/17/2023 8:41 PM
Reconnect Neutron Cables
படம்
Published
09/17/2023 9:03 PM
LD-260 Disconnect Switch Power On
படம்
Published
05/04/2023 3:37 PM
Source on Neutron Detector
படம்
Published
09/17/2023 9:29 PM
SC-770 Neutron Counts
படம்
Published
09/17/2023 9:34 PM
Infrared Connection
படம்
Published
09/29/2023 12:02 PM
Infrared Cable Installation
படம்
Published
09/17/2023 10:12 PM
Infrared Sensor Cable
படம்
Published
09/17/2023 10:13 PM
Remove all magnets and or adhesive tape from door switches
படம்
Published
09/08/2023 4:18 PM
Remove Magnet on Tamper Switch
படம்
Published
06/02/2023 4:31 PM