RPM Desiccant Inspection and Replacement | FRONTLINE Maintenance Tool

Last Updated: 04/24/2025 1:44 AM

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

Title	Type	Status	Last Updated
Rapiscan CM-267 Conveyor Monitor	Device	Published	06/27/2024 1:02 PM
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
7928 - 7927 - Establish Initial Conditions; Remark:	Procedure Step	Published	07/12/2023 12:24 AM
7927 - Establish Initial Conditions	Instruction	Published	07/12/2023 12:23 AM
7969 - 7968 - Close lane; Remark:8224	Procedure Step	Published	07/12/2023 12:35 AM
8226 - Warning : Traffic should temporarily be rerouted or halted during this procedure to ens...	Annotation	Published	09/05/2023 1:04 PM
7968 - Close lane	Instruction	Published	07/12/2023 12:35 AM
8224 - Use orange safety (traffic control) cones to setup barriers. Practice establi...	Remark	Published	09/05/2023 11:26 AM
7926 - 7924 - Open RPM door.; Remark:8223	Procedure Step	Published	07/12/2023 12:25 AM
7924 - Open RPM door.	Instruction	Published	07/12/2023 12:25 AM
8223 - Open all doors needed to access components.	Remark	Published	09/05/2023 11:27 AM
7270 - 7235 - Power off RPM; Remark:7236	Procedure Step	Published	09/01/2023 7:57 PM
7235 - Power off RPM	Instruction	Published	04/24/2023 12:30 PM
7236 - Move LD-260 switch to OFF position. The PWR ON	Remark	Published	04/27/2023 4:25 PM
7964 - 7963 - Inspect Desiccant; Remark:	Procedure Step	Published	07/12/2023 12:44 AM
7963 - Inspect Desiccant	Instruction	Published	10/12/2023 10:01 AM
7959 - 7958 - Inspect existing desiccant bags.; Remark:8233	Procedure Step	Published	07/12/2023 12:47 AM
7958 - Inspect existing desiccant bags.	Instruction	Published	07/12/2023 12:44 AM
8233 - Inspect existing desiccant bags visually and by feel. If the bags are only pa...	Remark	Published	09/05/2023 8:31 PM
7960 - 7956 - Document the current date on the existing bag if no replacement is required.; Remark:	Procedure Step	Published	07/12/2023 12:48 AM
7956 - Document the current date on the existing bag if no replacement is required.	Instruction	Published	07/12/2023 12:48 AM
7961 - 7955 - Inspect interior of RPM cabinets.; Remark:7954	Procedure Step	Published	07/12/2023 12:49 AM
7955 - Inspect interior of RPM cabinets.	Instruction	Published	07/12/2023 12:48 AM
7954 - Inspect cabinets for dirt, debris, and signs of water or rodent/insect infest...	Remark	Published	07/12/2023 12:48 AM
7962 - 7953 - Clean cabinet interior.; Remark:8227	Procedure Step	Published	07/12/2023 12:49 AM
7953 - Clean cabinet interior.	Instruction	Published	07/12/2023 12:49 AM
8227 - Use absorbent cleaning rags if required.	Remark	Published	09/05/2023 1:17 PM
7952 - 7951 - Replace Desiccant; Remark:	Procedure Step	Published	07/12/2023 12:50 AM
7951 - Replace Desiccant	Instruction	Published	10/12/2023 10:02 AM
7947 - 7945 - Remove exhausted desiccant bag(s); Remark:	Procedure Step	Published	07/12/2023 12:51 AM
7945 - Remove exhausted desiccant bag(s)	Instruction	Published	07/12/2023 12:51 AM
7948 - 7944 - Install new desiccant bag(s) in place of removed bag; Remark:	Procedure Step	Published	07/12/2023 12:52 AM
7975 - Caution : Place bags away from electrical connections to avoid damage if desiccant leak...	Annotation	Published	07/21/2023 4:26 PM
7944 - Install new desiccant bag(s) in place of removed bag	Instruction	Published	07/12/2023 12:52 AM
7949 - 7943 - Properly dispose of exhausted desiccant bag; Remark:	Procedure Step	Published	07/12/2023 12:53 AM
7943 - Properly dispose of exhausted desiccant bag	Instruction	Published	07/12/2023 12:52 AM
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
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
Routine Maintenance Procedure	Document Type	Published	03/02/2020 3:31 PM
minutes	Duration	Published	05/26/2022 11:41 AM
Monthly	Frequency	Published	04/01/2020 11:36 AM
Warning	Annotation Type	Published	03/02/2020 3:25 PM
Caution	Annotation Type	Published	03/02/2020 3:24 PM
Technician 1	Skill Level	Published	05/14/2020 2:56 PM
Keys to access RPM	Replacement Parts	Published	04/27/2023 6:56 PM
Reflective safety vest if required	Replacement Parts	Published	06/20/2023 4:47 PM
Ladder; 2 meters, 6 feet tall; non-conducting if required	Replacement Parts	Published	07/02/2023 4:48 PM
Traffic control cones or equivalent if required	Replacement Parts	Published	06/20/2023 4:47 PM
Safety glasses if required	Replacement Parts	Published	06/20/2023 4:47 PM
Medium Phillips (PH2) screwdriver	Tools	Published	04/24/2020 4:40 PM
Small Phillips (PH1) screwdriver	Tools	Published	05/14/2020 2:48 PM
Marker for marking the date on the desiccant bag	Replacement Parts	Published	07/12/2023 12:31 AM
LD-260 Disconnect Switch Power Off	Image	Published	04/24/2023 12:49 PM
DET-RPM-RAP-RM01 Desiccant Inspection and Replacement step 2-1	Image	Published	07/12/2023 9:19 AM
LD-260 Disconnect Switch Power On	Image	Published	05/04/2023 3:37 PM

DET-RPM-RAP-RM01

Inspect and replace desiccant in Rapiscan radiation portal monitor (RPM). (the frequency of required desiccant replacement will vary from site to site, type and quantity of desiccant and possibly season to season; the recommendation is to start monthly and adjust as necessary).

Equipment Hierarchy

Rapiscan CM-267 Conveyor Monitor

Rapiscan PM-700 Pedestrian Monitor

Rapiscan VM-250 Vehicle Monitor

Rapiscan TM-850 Rail Monitor

Frequency

Monthly

Technician Level

Técnico 1

x 1

Duration

Time increment

minutes

Notes

5 minutes per pedestrian monitor; 10 minutes per vehicle monitor; 20 minutes per rail monitor (additional 10 minutes with protective cage)

Length of time

Tools Required

Keys to access RPM

Reflective safety vest if required

Ladder; 2 meters, 6 feet tall; non-conducting if required

Traffic control cones or equivalent if required

Safety glasses if required

Medium Phillips (PH2) screwdriver

Small Phillips (PH1) screwdriver

Marker for marking the date on the desiccant bag

Materials Required

Refuse bag

Absorbent cleaning rags

Desiccant

Originators

Craig Stinson

Bailey Toon

Originating Organization

PNNL

Approver

Craig Stinson

Safety Concerns

Vehicle traffic

Final Documentation

Routine maintenance report

Departmental Coordination

Prior to arrival, notify operators concerning expected work, duration, and anticipated alarms and fault indications.

Date of Origin

2017-03-25

Version

0.00

Version #

Revision Date

2023-09-05

Revision Author

Paul Francik

Step 1

Main Step

7928 - 7927 - Establish Initial Conditions; Remark:

Step 00

7927 - Establish Initial Conditions

Establish Initial Conditions

7969 - 7968 - Close lane; Remark:8224

8226 - Warning : Traffic should temporarily be rerouted or halted during this procedure to ens...

Type

Warning

Traffic should temporarily be rerouted or halted during this procedure to ensure safety and prevent unscreened vehicles from passing.

Step 00

7968 - Close lane

Close lane

8224 - Use orange safety (traffic control) cones to setup barriers. Practice establi...

Use orange safety (traffic control) cones to setup barriers. Practice established safety protocols.

7926 - 7924 - Open RPM door.; Remark:8223

Step 00

7924 - Open RPM door.

Open RPM door.

8223 - Open all doors needed to access components.

Open all doors needed to access components.

7270 - 7235 - Power off RPM; Remark:7236

Step 00

7235 - Power off RPM

Power off RPM

7236 - Move LD-260 switch to OFF position. The PWR ON

Move LD-260 switch to OFF position. The PWR ON LED will turn off.

Step 2

Main Step

7964 - 7963 - Inspect Desiccant; Remark:

Step 00

7963 - Inspect Desiccant

Inspect Desiccant

7959 - 7958 - Inspect existing desiccant bags.; Remark:8233

Step 00

7958 - Inspect existing desiccant bags.

Inspect existing desiccant bags.

8233 - Inspect existing desiccant bags visually and by feel. If the bags are only pa...

Inspect existing desiccant bags visually and by feel. If the bags are only partially depleted, experience will indicate if the bags will last until the next inspection date or if they should be replaced now. Replace it if it feels like slush; it can remain if solid particles are present.

7960 - 7956 - Document the current date on the existing bag if no replacement is required.; Remark:

Step 00

7956 - Document the current date on the existing bag if no replacement is required.

Document the current date on the existing bag if no replacement is required.

7961 - 7955 - Inspect interior of RPM cabinets.; Remark:7954

Step 00

7955 - Inspect interior of RPM cabinets.

Inspect interior of RPM cabinets.

7954 - Inspect cabinets for dirt, debris, and signs of water or rodent/insect infest...

Inspect cabinets for dirt, debris, and signs of water or rodent/insect infestation. Make note of any problems observed in operator log.

7962 - 7953 - Clean cabinet interior.; Remark:8227

Step 00

7953 - Clean cabinet interior.

Clean cabinet interior.

8227 - Use absorbent cleaning rags if required.

Use absorbent cleaning rags if required.

Uso

Step 3

Main Step

7952 - 7951 - Replace Desiccant; Remark:

Step 00

7951 - Replace Desiccant

Replace Desiccant

7947 - 7945 - Remove exhausted desiccant bag(s); Remark:

Step 00

7945 - Remove exhausted desiccant bag(s)

Remove exhausted desiccant bag(s)

7948 - 7944 - Install new desiccant bag(s) in place of removed bag; Remark:

7975 - Caution : Place bags away from electrical connections to avoid damage if desiccant leak...

Type

Caution

Place bags away from electrical connections to avoid damage if desiccant leaks. Do not place desiccant bag on top of the neutron detector due to leaking CaCl desiccant bags causing issues in the field. A different location needs to be determined

Step 00

Step 4

Main Step

Routine Maintenance Procedure

Percent Complete

100.00

Percent Complete W/Media

100.00