Forms

Any radioactive material that is encased in a capsule designed to prevent leakage or escape of the radioactive material is defined as a sealed source. It is imperative that all radioactive sources sealed or encapsulated are properly accounted for and are periodically checked for leakage.

Registration of Sources: All sources of radioactive material sealed or encapsulated, regardless of the activity must be registered with ESH. This requirement applies to sources such as low activity check sources or sources which are incorporated into machines or devices. Be aware that all Liquid Scintillation Counters contain radioactive sources.

Leak Testing of Sealed Sources: All sealed sources containing 100 µCi or more of Beta or Gamma emitting radionuclides or 10 µCi or more of alpha emitting material in any form other than gas will be tested for leakage and contamination by ESH at intervals not to exceed six months. Exceptions are as follows:

sources containing exclusively hydrogen-3
sources containing radionuclides with a half-life of less than 30 days
Iridium-192 seeds in nylon ribbons
sealed sources that are no longer in use (i.e., in storage)

Inventory Control: A physical inventory of all sealed sources must be conducted at least annually by the individual authorized to possess the source or a designee. The inventory consists of the model, serial number if any, location (room, building) of the source, and initials of the individual conducting the inventory. ESH conducts an annual physical inventory of sealed sources in its storage and either a quarterly or a semi-annual inventory of sources requiring leak tests.

	Radioactive Sealed Sources
	Any radioactive material that is encased in a capsule designed to prevent leakage or escape of the radioactive material is defined as a sealed source. It is imperative that all radioactive sources sealed or encapsulated are properly accounted for and are periodically checked for leakage. Registration of Sources: All sources of radioactive material sealed or encapsulated, regardless of the activity must be registered with ESH. This requirement applies to sources such as low activity check sources or sources which are incorporated into machines or devices. Be aware that all Liquid Scintillation Counters contain radioactive sources. Leak Testing of Sealed Sources: All sealed sources containing 100 µCi or more of Beta or Gamma emitting radionuclides or 10 µCi or more of alpha emitting material in any form other than gas will be tested for leakage and contamination by ESH at intervals not to exceed six months. Exceptions are as follows: sources containing exclusively hydrogen-3 sources containing radionuclides with a half-life of less than 30 days Iridium-192 seeds in nylon ribbons sealed sources that are no longer in use (i.e., in storage) Inventory Control: A physical inventory of all sealed sources must be conducted at least annually by the individual authorized to possess the source or a designee. The inventory consists of the model, serial number if any, location (room, building) of the source, and initials of the individual conducting the inventory. ESH conducts an annual physical inventory of sealed sources in its storage and either a quarterly or a semi-annual inventory of sources requiring leak tests.