Radioactive material (RAM) orders must be placed through the WUSTL Marketplace.  Your RAM Order must be submitted for Radiation Safety’s final approval by 10 AM on a workday to assure next workday delivery when applicable.  For instructions on how to place a RAM order, please review the document How to Enter a RAM Order.

Only individuals who have Radioactive Material Order function entry and departmental security will have the ability to submit a RAM Order requisition to Marketplace.   Only PIs (Principle Investigators) who are approved as Authorized Users by the WUSTL Radiation Safety Committee can receive and use specific types and quantities of radioactive materials in specific room numbers for which they are approved.   So, it is best that someone trained to know the Authorized User’s approved radioactive materials and locations be the individual entering RAM Orders into Marketplace.

If you cannot find the information you are looking for in the sections below, please contact the Radiation Safety Office at 314-362-3476 or

Cancelling Or Changing An Order

We ask that you email Radiation Safety ( if you cancel your RAM Order or if you change the delivery date, total activity, or RAM location for the RAM Order.  In your email, please provide us with the AU name and the purchase order number.   You do not have to notify Radiation Safety if your RAM Order change involves price or budget fund changes.  If your change involves changing the AU or RAM isotope, we ask that you cancel the original RAM Order and start a new RAM Order.

Correcting An Incorrect Order

 If you notice you have entered incorrect information in Marketplace before you create your requisition, you can go back and adjust the applicable fields on the draft requisition.  The individual(s) in your department who submit your Marketplace requisition to AIS will also check your information and may deny your order if there are errors.   If you have your AIS profile set for this option, you will also get an automatic email from telling you of errors in your RAM requisition.   Radiation Safety will make a final review of your RAM Order, and if something is incorrect, your RAM Order may be denied.

If your RAM Order gets mistakenly placed in a manner outside of the approved procedures, your Authorized User will receive a violation on their radioactive material inspection and will be asked to document what happened, why it happened, and what corrective actions have been put in place to prevent it happening again.  Repeat violations may lead to your Authorized User losing his/her approval to receive and use radioactive materials.

Deficiencies For Improperly Placed Radioactive Material Orders

Ultimately, it is the Authorized User who is responsible for ensuring that RAM is properly ordered, received, used, stored and disposed within his or her authorization.   This would include providing sufficient instruction and information to the administrator placing RAM orders.   To assist in this, Radiation Safety has created a Radioactive Material Ordering sheet that can be completed by the person requesting the RAM and provided to the administrator placing the order.  It is for your in-house use only – a copy does not have to be provided to Radiation Safety.  It is not mandatory that this form be used.  It is simply offered as a way for lab groups to ensure that the administrator has all the information needed to properly order RAM.

Now that individuals with access to Marketplace can initiate RAM orders, your administrator may allow the Authorized User or Radiation Workers to begin the ordering process by entering the RAM order information directly into Marketplace. See How to Enter a RAM Order.

Delivery Date

Most RAM Orders are shipped overnight by the next day following receipt of the RAM Order.  If you ensure your department has completed all of its ordering approvals by 10 AM on workdays for Radiation Safety’s final approval of Marketplace RAM Orders to send the order to the vendor, then you can enter the next workday date.  If you are ordering multiple delivery dates, each delivery must be entered on a separate line and each delivery date entered.

Order Surcharges

The RAM order surcharge is adjusted each year to reflect market changes. Rates are available through the links below.

Receiving Your Package

Please open the package in a timely fashion (within a day or 2, at the latest) and keep the receipt.  You should then follow this instructions in Section III of the receipt form.  Wipe and meter survey the box and packing materials…dispose as radwaste if they are contaminated and notify Radiation Safety immediately.  If they are not contaminated, remove or completely obliterate any “radiation” or “hazard” signs/symbols/wording before disposing in the regular trash.  Wipe test the final vial to be sure it is not contaminated.  Immediately complete the third section of the receipt, indicating that you’ve completed all the steps above.  Your receipt now becomes the “accountability” form for that vial of material.

Shipping / Receiving From A Collaborator At Another Institution

Please notify the Radiation Safety Office first to coordinate any intra-institution transfers.  We must first verify and exchange licenses to ensure that the receiver and his/her institution is approved for the items being sent.  Radiation Safety will package and send outgoing shipments, and should receive at our office all incoming shipments.