Engineered Materials - std3028

DOE-STD-3028-2000

6.1.3

Engineered Materials

1. Ceramic material, consisting of high-fired 233U-thorium oxide pellets clad with Zircaloy

or packaged in stainless steel and having a historical record of quality assurance

meeting the intent of 10 CFR 830.120 or the applicable quality program at the time of

manufacture, meets all the requirements of Section 6.1.2 without additional

stabilization or testing. Pellets extracted from such rods are also considered to meet

all the requirements of Section 6.1.2 at the time they are declad. Clad metal fuel with

a similar assurance of cladding integrity meets all the requirements of Section 6.1.1.

2. Unclad, high-fired ceramic fuel pellets that satisfy Criterion 6.1.2.1 are considered to

meet the requirements of Section 6.1.2 without additional treatment. Such mixed

oxide pellets that cannot meet the requirements of Criterion 6.1.2.1 shall be

stabilized according to Criterion 6.1.2.2, and shall meet Criterion 6.1.2.1 of this

Standard prior to packaging.

6.1.4

Storage after Stabilization Deferred Packaging

1. Oxides that previously have been stabilized as specified in Criterion 6.1.2.2 met the

criteria specified in 6.1.2.1and 6.1.2.3 at the time of stabilization. These would be

placed in a closed container (such as a convenience can) and be packaged into the

inner and outer sealed containers described in this Standard without additional

stabilization, provided the container and contents appear unchanged and the volatile

content can be shown to be less than 0.5 wt%, for example by a re-weighing. The

residual volatile content may be determined, for example, by measurement at the

time of packaging into the inner container or by adding any weight gained during the

time between stabilization and packaging into the inner container to the determined

volatile content at the time of stabilization.

6.2

Containers the "Packaging"

6.2.1

Container Design Concept

1. The container assembly shall consist of stabilized material in a minimum of two

individually sealed, nested containers. One container provides the pressure

boundary to prevent release of the contents. The other container provides an

additional isolation boundary. The outer and inner containers shall be sealed by

welding or by other techniques that meet or exceed the performance characteristics