Radiation Shielding - std3028

DOE-STD-3028-2000

portions of DOE Orders 420.1, 5480.21, 5480.22, and 5480.23. The need for ventilation

systems for confinement purposes shall be based on the results of the safety analysis. The

combination of the material storage system and the storage facility represents a defense-in-

depth safety confinement system.

7.3

Radiation Shielding

Owing to the presence of 232U in 233U inventories, radiation shielding may be required to

attenuate the 2.6 MeV (4.17E-6 erg) photon emitted by the 232U daughter, 208Tl. Depending on

the material form and material storage system used, the facility itself may serve as a radiation

shield. The regulations pertaining to occupational radiation protection as specified in 10 CFR

835, shall be met.

7.4

SNM Safeguards

Uranium-233 is a weapons-usable material due to its fissile properties and its ability to be

produced in sufficient quantities for manufacturing nuclear weapons. This material shall be

protected from unauthorized access and unauthorized use. Safeguards measures shall meet

the requirements of DOE O 470.1, DOE O 471.2A, DOE O 472.1B, DOE O 474.1, and DOE

5632.7A.