Sealed Source Safety Manual

24 Sealed Source Safety Manual Iowa State University 2408 Wanda Daley Drive Ames, Iowa 50011-3602 Log Number: xxxx-xxxx • For additional information regarding the procurement of sealed sources refer to How do I Buy… Radioactive Isotopes. Security PIs and lab personnel must ensure that nuclear gauges are secured from unauthorized use, transfer, tampering, or theft. When in use the nuclear gauge shall be under constant ‘line of sight’ surveillance by an approved user. When not in use, the nuclear gauge is required to be secured with two independent physical barriers. Examples of two independent physical barriers include • Securing the nuclear gauge in a locked storage facility located inside a locked laboratory. • Securing the nuclear gauge with a cable security restraint inside a locked vehicle. • Storing the nuclear gauge inside a locked, non-removable box and further securing the box with a steel cable or chain. If chains or cables are used as a method of providing security, one of the two chains or cables used should be substantially more robust and more difficult to cut than the other. Simply having two chains or cables with locks would not satisfy the security rule unless each chain and lock combination were physically robust enough to provide both a deterrence and a reasonable delay mechanism. While transporting a nuclear gauge, a licensee should not modify the transportation case if it is being used as the primary container for transporting the device. This includes, but is not limited to, drilling holes to mount the case to the vehicle or to mount brackets or other devices used for securing the case to the vehicle. Inventory The PI is required to maintain inventory records. EH&S provides an Inventory and Usage log with each source. The Inventory and Usage Log form should be used by laboratory staff to document source inventory. EH&S conducts a physical inventory of all license specific sources received and possessed under Iowa State University’s Broadscope License at intervals not to exceed six months. Note: Notify EH&S immediately if the gauge is missing! Note: Portable nuclear gauges must be secured using two independent physical barriers!