The following information was obtained from the Master Materials License Holder via facsimile:
The loss occurred at a medical permittee authorized under the master materials license issued to the Department of Veterans Affairs, NRC License 03-23853 01 VA. The permittee is the Clement T. Zablocki VA Medical Center, Milwaukee, Wisconsin.
The loss occurred circa 2001 and was discovered on May 6, 2004. The basis for the report is under 10 CFR 31.5(c)(10) in that radioactive materials obtained under a general license were lost and the reporting requirements in 10 CFR 20.2201 must be followed.
Specifically, the permittee stated four tritium exit signs were apparently disposed or discarded during a facility construction project circa 2001. The signs were last seen in 2000.
The signs were either of two models. 'The first model is a 11.5 Curie sign from Shield Source Incorporated. The second model is a 20 Curie sign from SRB Technology. The signs were manufactured circa 1994.
The Department of Veterans Affairs will evaluate the circumstances related to the loss of radioactive materials and submit a written report to NRC, Region III, within 30 days.