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Oxide Fuel Pins under Extreme Conditions


Studying Features of Vibropack Oxide Fuel Pins Serviceability under the Limit Operational Parameters

Tech Area / Field

  • FIR-FUE/Reactor Fuels and Fuel Engineering/Fission Reactors

8 Project completed

Registration date

Completion date

Senior Project Manager
Tocheny L V

Leading Institute
NIIAR (Atomic Reactors), Russia, Ulianovsk reg., Dimitrovgrad


  • Japan Nuclear Cycle Development Institute, Japan, Ibaraki

Project summary

The project is continuation of the ISTC project № 272. The work on project includes experimental investigations fuel pins with vibropack oxide fuel. The experimental data for verifying computer codes, which are used in estimating serviceability of vibropack fuel pins, will be received after post irradiation examination. This project is aimed at solving the problem of creating vibropack oxide pin for burning out MA in the special nuclear power facilities.

The aim of the work is:

— PIE of previously made pins with fuel, containing neptunium, pins with burnup more than 30 % h.a. and pins upon operating under emergency conditions of partial blockade of coolant;
— developing calculation model, describing behavior of pin with vibropack oxide fuel, including MA, when operated under nominal and extreme conditions;
— analysing PIE results and preparing experimental data for verifying computer codes;
— verifying calculation code.

The results of the work can be used for development of pins with vibropack oxide fuel with neptunium and MA for operation under nominal operational conditions up to high burnup and under emergency conditions.


1. experimental data on the behaviour of vibropack uranium-plutonium oxide fuel pins in reaching burnup 30 % h.a.;
2. experimental data on the behaviour of vibropack uranium-neptunium oxide fuel pins;
3. experimental data on the behaviour of vibropack oxide fuel pins under emergency operational conditions with partial blockade of coolant flow-rate;
4. computer data bank on in-pile tests and PIE of vibropack fuel pins, including computer version of metallographic investigations results;
5. verified computer model, describing the behaviour of vibropack fuel pin when operated under nominal and extreme conditions.


Participation of collaborator will comprise:

1. Summarizing results of investigations, made before, and choosing pins for input into computer data bank.
2. Discussing mathematical models, describing the behaviour of vibropack fuel pins.
3. Discussing PIE results.
4. Discussing results of verification calculation.


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