Fuel Reprocessing

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INES-event
INES 1

OVEREXPOSURE OF OPERATORS WHILE CHARGING IRRADIATED FUEL BUNDLES INTO THE DISSOLVER

Spent fuel reprocessing campaign at Plutonium Plant was in progress on 18th March 1994. The charging cask with the fuel was mated to the dissolver port hole at the charging bay of the dissolver. The liner with the fuel was pushed in and the pushing of the fuel into the dissolver was started. But the fuel got stuck between the dissolver port and the liner. When the charging cask was withdrawn, the fuel was partly out of the cask. There was no damage to the cladding nor any release of radioactivity to the environment.

Category: Fuel Reprocessing India »

INES-event
INES 2

RADIATION EXPOSURE OF WORKERS AT TOKAI REPROCESSING PLANT

Four workers were exposed internally while they were replacing a filter element of the vacuum filter installed in the sampling system connected to the plutonium receiving vessel of the rework process of the Tokai Reprocessing Plant on December 27, 1993. At the time of incident, operation of the Tokai Reprocessing Plant was stopped for routine maintenance from December 5, 1993. The cause of the internal exposure was that the four workers inhaled plutonium particles dispersed from the filter element in the vacuum distribution room.

Category: Fuel Reprocessing Japan »

INES-event
INES 0

ACID SPILLAGE IN THORP

A minor seepage of uranyl nitrate liquor from the containment surrounding a pump has occurred in the chemical separation area of the Thermal Oxide Reprocessing Plant (THORP) at Sellafield. The volume was approximately one litre, covering an area of about 30 cm squared. No person has been sujected to any radiological hazard from the seepage and there was no relase of radioactive material to the environmet. Air smaplers confirmed that there was no abnormal airborne radioactivity resulting from the seepage.

Category: Fuel Reprocessing Sellafield United Kingdom »

INES-event
INES 2

OVEREREXPOSURE OF A RADIOGRAPHY INSPECTOR AS A RESULT OF A WOUND

A special programme of urine sampling on a radiography inspector has confirmed a committed dose equivalent to bone surfaces of 628 mSv and a committed effective dose equivalent of 32.4 mSv following a puncture wound to his right elbow sustained during an inspection of a weld in a plutonium facility. The inspector had to lie on the floor to gain access to the weld and in so doing felt a sharp prick in his elbow. The wound was excised and about 1500 Bq of plutonium was removed from the wound site.

Category: Fuel Reprocessing Sellafield United Kingdom »

INES-event
INES 2

INTAKE OF RADIOACTIVE MATERIAL BY OPERATORS AT DOUNREAY

Operations were being carried out in the residue recovery plant of the Prototype Fast Reactor Reprocessing Plant at Dounreay on the evening of 29 June 1993. Following the opening of a drum which contained centrifuge filter there was a small release of radioactive material, which was fully contained within the plant and easily cleaned up. The inital indications were that no significant doses had been received by workers.

Category: Fuel Reprocessing Dounreay United Kingdom »

INES-event
INES 2

SEEPAGE FROM A WASTE DRUM

During a routine inspection, about 200 ml of liquid was observed on the building floor adjacent to a plutonium contamined waste drum. Chemical analysis of the liquid indicates a specific activity of 2.2 MBq/ml Beta. Two people received minor contamination of their hands while taking a sample of the liquid. They were successfully decontaminated. The quantity spilled is estimated to be 450 MBq of plutonium, radiologcally equivalent to 4500 GBq of ruthenium 106.
(Please see also press release attached.)

Category: Fuel Reprocessing Sellafield United Kingdom »

INES-event
INES 1

PLUTONIUM RECOVERY PLANT, B204

An abnormal discharge of plutonium amounting to 600 MBq over 2 days took place via the ventilation system and discharge stack from a redundant plutonium recovery plant. The current best estimate of dose to the potentially most exposed member of the public is about 1 microSv.
An investigation is underway to determine the cause of the release.

Category: Fuel Reprocessing Sellafield United Kingdom »

INES-event
INES 2

SIGNIFICANT SPILLAGE OF PLUTONIUM LADEN SOLVENT

The final stage of reprocessing of spent nuclear fuel involves the separation of plutonium in a solvent phase (tributyl/phosphate/odourless kerosene) from the uranium/plutonium/fission product mixture. The solvent containing plutonium as nitrate at about 10E+6 Bq/ml is sampled in a number of lightly shielded cabinets before the solvent is stripped to leave plutonium nitrate in the aqueous phase.

Category: Fuel Reprocessing Sellafield United Kingdom »

INES-event
INES 3

PLUTONIUM NITRATE LEAK IN CELL

Plutonium nitrate leaked from a corroded pipe to the containment cell and accumulated as a crystalline solid mass. There was no release to the Operations Areas nor to the Environment. The spillage was removed, the plant repaired and restarted.

Category: Fuel Reprocessing Sellafield United Kingdom »