1

INES Levels
INES N/A 
INES 4
INES 0
INES 5
INES 1
INES 6
INES 2
INES 7
INES 3

INES 1: Anomaly

Impact on Defence-in-Depth
  • Overexposure of a member of the public in excess of statutory ­annual limits.
  • Minor problems with safety components with significant defence-in-depth remaining.
  • Low activity lost or stolen radioactive source, device or transport package.
(Arrangements for reporting minor events to the public differ from country to country. Also, it is difficult to ensure precise consistency in rating events between INES Level-1 and Below scale/Level-0)
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INES-event
INES 1

Found orphan Cs-137 source

On 22.11.2013 radiation portal monitors at a Finnish stainless steel factory indicated that an incoming shipment of scrap metal contained a radiation source. The factory immediately contacted Radiation and Nuclear Safety Authority (STUK). An inspector from STUK went to the site. The source was tentatively identified as Cs-137.

Category: Radiation Source Finland »

INES-event
INES 1

Radioactive gauge, lost and found

On October 12th 2012 during the removal of a detector from an industrial densitometer, technicians of a greek aluminium company in Voiotia realized that the lock mechanism of a Cs-137 source (5 mCi - 1993), as well as the source itself were missing. Two engineers, trained in radiation protection, blocked the area on a 10 m radius and started the search using a portable detector. The source was found near an open surface drainage stream covered in a sediment crust at a distance of a few meters from the housing.

Category: Radiation Source Greece »

INES-event
INES 1

Inadequate planned repair of the 10UV68S201 quick-acting gate valve despite of the regulations of the Operational Limits and Conditions

On September 03, 2012, at 09:34 a.m., the fast-acting gate valve 10UV68S201 in the chilled water system was switched off in opened position (with the aim of providing appropriate chilled water for equipments within the hermetic area) in order to perform a planned repair. On September 05, 2012, at 03:00 p.m., the operating staff realized that the provision prescribed in item 5.6.4.3 of the Operational Limits and Conditions was not complied due to the switched off condition of the fast-acting gate valve.

Category: Power Reactor Hungary »

INES-event
INES 1

Stolen and lately recovered intact radioactive source

At 21:50, on 03.09.2012, the Bulgarian Nuclear Regulatory Agency (BNRA) received a notification for an industrial radiography camera being stolen. The robbery happened at 15:00 o’clock when the radiography crew had been performing weld checks at a construction site in Sofia (Kosta Lulchev street). The industrial radiography camera is owned by a licensed construction company (license valid till January 2015).
Stolen camera is of the Gammamat R 30 type and is loaded with an Ir-192 radioactive source with a total activity of 380 GBq.

Category: Radiation Source Bulgaria »

INES-event
INES 1

Radiation Exposure of workers to tritium

On June 23, 2012, Rajasthan-5 was under planned biennial shutdown. Work was in progress to weld a piping connection for making alternate provision for water addition to the moderator system. During the work, tritium concentration in the work area increased when an opening was made in the moderator cover gas line. Two of the contract workers involved in the job got internal exposure of tritium equivalent to radiation dose of 24.32 mSv and 16.54 mSv.

Category: Power Reactor India »

INES-event
INES 1

Fire and abnormal primary circuit leak occured at Penly NPP n°2 reactor

On 5 April 2012, at around 12 midday local time, ASN was informed by the operator EDF that a fire had started in the n°2 reactor building of the Penly NPP (North-West of France). The reactor automatically shut down.

EDF teams and the local firemen brigades entered the reactor building and extinguished burning oil. The firemen ensured the fire was totally extinguished.

Category: Power Reactor France »

INES-event
INES 1

Am-241 source melting

An orphan Am-241 source inadvertently included in scrap metal was melted on the //23/2/2012 // in a Finnish steel factory in Tornio. The first alarm of abnormal radiation level was given by detectors screening the slag pots. The activity of melted source can not be determined exactly, but it is estimated to fall in to Category 4 (0,6 – 60 GBq). The source is traced by the operator to stainless steel scrap delivered from Central Europe.

Due to its physical properties most of the Am-241 activity is partitioned in to the slag phase (aprox 99%) and dust phase (1%).

Category: Radiation Source Finland »

INES-event
INES 1

Start of a fire in decontamination machine of former nuclear manufacturing plant of Bosco Marengo (AL) under decommissioning

On December 22nd 2011 Sogin S.p.A, which operates the former plant Fabbricazioni Nucleari of Bosco Marengo (AL) currently under decommissioning, communicated to ISPRA (Institute for Environmental Protection and Research)-which perform the functions of Nuclear Safety Authority- an anomalous event related to the decontamination machine by \shot blasting\ located inside the plant occurred at 9:25 am local time.

Category: Other Italy »

INES-event
INES 1

Hazardous manipulation of a lightning rod with Ra-226

On April 7 ITN ( the Nuclear and Technological Institute), the institution responsible for the interim storage of radioactive waste in Portugal, was contacted by a private company that requested instructions on how to dismantle, handle and transport a radioactive lightning rod (containing a category 5 radioactive source). Detailed instructions were provided by ITN to the company.

On October 4, the lightning rod was finally delivered at ITN.

Category: Radiation Source Portugal »

INES-event
INES 1

Found radioactive source

On 28 Sep 2011 evening, a citizen equipped by the chance with a special watches with dosemeter, informed the Police of the Czech Republic that there was an increased radiation on a children playground in Prague 4. By activating the integrated emergency services the police and fire brigade arrived to the location. The increased radiation was confirmed, State Office for Nuclear Safety (SONS) dispatched a mobile group of National Radiation Protection Institute, which measures the radiation and identified the source. The amounts of dose were approx.

Category: Radiation Source Czech Republic »