Radioactive Source Disposal & Recycling in Baltimore: Handling Sealed Sources Without Losing the Paper Trail

Sealed radioactive sources are one of those categories of industrial equipment that most people never think about until something changes — a project ends, a building sells, a device fails calibration, a licensed radiation safety officer retires. Then the source becomes an object that has to go somewhere specific, in a specific way, with specific paperwork, and doing any of that wrong can be considerably more expensive than the original device was worth.

Baltimore has a wide install base of sealed sources because of its mix of academic medical centers, port and infrastructure inspection work, and a long history of industrial radiography around the harbor. What follows is a working overview of the disposal and recycling routes for the sealed sources most often encountered here.

The universe of sources this covers

"Sealed source" is a broad term for radioactive material encapsulated in a housing designed to prevent leakage under normal use. The common types in and around Baltimore:

• Moisture-density gauges — Troxler and CPN units used in road construction, geotechnical work, and soil testing. Typically contain cesium-137 (roughly 8 mCi) and americium-241/beryllium (roughly 40–50 mCi).
• Fixed industrial gauges — level, thickness, and density gauges on process lines at the Sparrows Point-area operations and along the industrial corridor. Cs-137 or Co-60, sometimes larger activities.
• Radiography sources — Ir-192 (short-half-life, but active) and Se-75 for weld inspection in shipyard and infrastructure work.
• Medical sources — Cs-137 blood irradiators (being phased out under NNSA's Cesium Irradiator Replacement Project), Co-60 teletherapy legacy units, and various brachytherapy sources.
• Well-logging sources — less common in Baltimore than in oil-producing regions, but occasional.
• Static eliminators and calibration checks — small Po-210 or Am-241 sources, sometimes forgotten in old lab drawers.

All of these are regulated. What varies is by whom, and how hard it is to legally hand them off.

Who regulates you: MDE, NRC, or both

Maryland is an NRC Agreement State. That means the Maryland Department of the Environment's Radiological Health Program administers most sealed-source licenses inside the state, using rules that are substantially equivalent to the federal ones. Practically:

• If you hold a specific license (portable gauge company, medical facility, industrial radiographer, etc.), MDE is your regulator for possession, transfer, and disposal within Maryland.
• If you're transferring a source out of state, the receiving licensee's authority (NRC or another Agreement State) also matters — the transfer is only legal to a properly authorized recipient.
• If you hold a general license — often the case for small static eliminators or check sources — the reporting obligations are still there, and MDE tracks these under the National Source Tracking System for higher-activity sources.

Do not assume that because the device has been sitting in a locker for eight years, MDE has forgotten about it. They have not. The licensing system tracks by serial number, and end-of-life audits are a routine part of a decommissioning inspection.

Your realistic end-of-life options

1. Return to the manufacturer.

The cleanest option for most gauges. Troxler, CPN, InstroTek, VEGA, Ohmart/Vega, Ronan, Berthold — all of the major sealed-source device manufacturers operate return programs and hold the licenses required to accept their own products back at end of life. Costs vary from a few hundred dollars for a small check source to five figures for a large fixed gauge, and they are almost always cheaper than an alternative. Confirm the manufacturer is still operating and still accepting the model you have; several manufacturers have exited certain product lines and no longer accept returns.

2. Transfer to a licensed broker or waste processor.

Where the manufacturer route is closed — orphaned devices, sources of unknown provenance, or devices the manufacturer no longer accepts — a specialty broker will take custody, characterize the source, and either recycle it (recasting the encapsulation for re-use) or forward it to a licensed low-level radioactive waste disposal facility. Baltimore-area operations often coordinate this through regional hazardous waste contractors who hold the necessary Type A/B shipping packages and radioactive materials transportation licenses. A local example: radioactive source disposal and recycling in Baltimore providers work with the specialty processors to arrange packaging, DOT-compliant shipping, and MDE notifications on the generator's behalf.

3. Off-site storage as an interim measure.

If a manufacturer or broker has a capacity constraint and can't accept the source for months, MDE-authorized interim storage is a legitimate bridge. This is not "leave it in the closet." It's a licensed facility that will accept the source under a formal storage agreement, with a defined disposal endpoint.

4. Recycling — for materials, not the source itself.

Some sources — particularly Co-60 and Cs-137 — can be re-encapsulated and re-used for lower-activity applications by specialty facilities. This is often described as "recycling" in the industry and is genuinely different from disposal: the radioactive material remains in use rather than going to a burial facility.

The recordkeeping that survives you

Sealed source records are one of the few compliance areas where "keep them forever" is genuinely the safest advice. At minimum:

• Original receipt documentation with serial number, isotope, activity, and reference date.
• Leak test records for the entire operating life of the source.
• Inventory records and location logs.
• The disposition record — signed manifest, receipt from the manufacturer or broker, and any accompanying certification from the receiving facility.

Transport, briefly

Sealed sources ship under 49 CFR Part 173 as radioactive material — Type A packaging for most portable gauges, Type B for larger fixed sources or higher activities. The generator does not have to do the shipping themselves; the transportation is almost always handled by the receiver or the broker under their own package certifications. You do have to be present for the pickup, verify the source against your records, and countersign the shipping papers.

A short decommissioning checklist

1. Locate every source on your license and confirm the serial number matches.
2. Verify the most recent leak test is within the required interval, or perform one before shipping.
3. Contact the manufacturer first. Get their return authorization and quote in writing.
4. If manufacturer return isn't available, engage a broker with an active radioactive materials license and shipping capability.
5. Notify MDE per your license conditions. For higher-activity sources, this is a formal disposition report; for lower-activity, a note in your records may suffice.
6. File the signed disposition record. Retain permanently.

None of this is difficult. It is just unforgiving of shortcuts.