GB/T 10266-2008Specification for sintered uranium dioxide pellets (English PDF)

1 Scope

This standard specifies the technical requirements, pellet batches, sampling, testing and inspection, packaging and transportation requirements for sintered uranium dioxide pellets (hereinafter referred to as "pellets").

This standard is applicable to pellets with various 235U enrichments for nuclear reactors.

This standard does not include the relevant content of the prevention of criticality accidents and the requirements for safety and health. The use of this standard shall also comply with relevant national regulations on nuclear material control, transportation, handling, use.

2 Normative references

The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard;

however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable.

For undated references, the latest edition of the referenced document applies.

GB/T 10265 Specification for nuclear grade sinterable uranium dioxide powder (GB/T 10265-2008, ASTM C753:2004, MOD)

GB 11806 Regulations for the safe transport of radioactive material (GB

11806-2004, IAEA Safety Standards Serries No. TS-R-1, 2003, IDT)

GB/T 13696 Specification for uranium hexafluoride enriched to less than 5%

235U

EJ/T 689 Testing method for the thermal-stability of sintered UO2 pellets

3 Technical requirements

4 Requirements of pellets batch

4.1 Pellets, which are made from the same batch of uranium dioxide powder, meet the requirements of GB/T 10265, use the same group of process parameters, are defined as a pellet batch.

4.2 The identification of a pellet batch shall be retained, throughout the production process. In the whole process, it shall ensure the identity of batch materials; it is not allowed for mixing of materials.

5 Sampling

5.1 Sampling, weighing, sample processing must be carried out, under conditions that ensure that the sample is representative of the batch. The sampling plan, which meets the acceptance criteria, shall be negotiated by both the supplier and the buyer.

5.2 The purchaser has the right to select a representative sample from each pellet batch, AND determine its chemical, nuclear or physical properties.

5.3 The batch of samples shall have a sufficient number of pellets, so that it can carry out the quality inspection and arbitration test if necessary, at the supplier's factory, as well as the acceptance test, at the buyer's factory, when necessary.

6 Test and inspection

6.1 The supplier shall test samples, in accordance with the requirements described in Chapter 5, to ensure that the pellets meet the requirements of

Chapter 3. All tests shall be carried out on the basis of technology, which is agreed upon by the supplier and the buyer.

6.2 Within the time period, which is agreed upon between the supplier and the buyer, the supplier shall save all results AND provide all results when required, to prove that the pellets meet the requirements described in Chapter 3.

6.3 The buyer can use the samples, which are provided by the supplier, OR samples, which are taken from the buyer's factory, for acceptance tests.

Acceptance shall be based on a batch of pellets; it shall depend on the material properties, which meet the requirements of Chapter 3 OR the requirements after amended according to the contract documents.

6.4 If there is a dispute over the analysis results, a third party, which is agreed upon by the supplier and the buyer, shall be determined as the arbitrator.

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