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Register of occupational exposure
GENERAL INFORMATION
 
 

One of the main tools to ensure radiation protection is monitoring and assessment of occupational exposure. It helps to ascertain that occupational doses do not exceed established dose limits and gives information about workplace hazards and helps to find solutions on how to protect people.

 

In order to ensure this, the Government established a State Register of sources of ionizing radiation and occupational exposure (hereinafter – Register), which is administered by the Radiation Protection Centre.

 

The purpose of Register of occupational exposure is to collect, process, systematize, store and provide data about workers‘, who work with ionizing radiation sources, professional irradiance.
 
 
LEGAL BASIS

Law on Radiation Protection designates the constitutor and manager of the Registers. 
 

Management and use of the data, security and links with other registers are implemented according to the Government resolution No. 651 On the Establishment of the State Register of Radiation Sources and Occupational Exposure and Approval of its Statute, approved on 25 May 1999.

 

Procedure of Data about Ionizing Radiation Sources and Workers Working with Ionizing Radiation Sources Submission to the State Register of Ionizing Radiation Sources and Occupational Exposure, approved by the Order No. V-675 of the Minister of Health of the Republic of Lithuania on 24 August 2009, instructs the licence holder on preparation of the documentation regarding workers involved in activities with sources (starting, finishing work or any change in activities) and submission of it to the Register


Lithuanian Hygiene Standard HN 83:2004 “Radiation Protection and Safety of outside Workers” establishes requirements for radiation protection and safety for outside workers, who are sent to other licensees to perform activities with sources in a controlled zone and are subject to exposure.

 

 

REGISTER DATA
 
Data on occupational exposure is accumulated since 1992, data on occupational exposure at Ignalina nuclear power plant – since 1983. Monitoring and evaluation of occupational exposure gives information about workplace hazards and helps to find solutions on how to protect people. The variation of number of occupational doses collected in the Register during 2014–2016 is shown in picture 1.
 
1 picture. Occupational doses collected in the Register during years 2014–2016


One of the most influential criteria in assessing radiation protection of workers dealing with sources or working in the vicinity of sources are doses of occupational exposure. According to the data stored in the Register, in 2016 the majority (about 94 per cent.) of measured annual occupational exposure doses were lower than the minimum registration limit (1 mSv). Data regarding average values of doses for distinct occupations in 2016 are shown in table 1.

Table 1. Data regarding average values of doses for distinct occupations in 2016*
 
Type of practice, profession
Number of workers
Average individual dose during the year, mSv
Medical institution
3 478
 
Doctors
1 680
 
X-ray diagnostics
399
0,2
Odontology
587
0,11
Tomography
53
0,26
Interventional radiology and cardiology
119
1,59
Nuclear medicine
18
0,17
Radiation therapy
45
0,17
Veterinary
34
0,15
Other
425
0,27
Nurses
1 607
 
X-ray diagnostics
707
0,2
Odontology
198
0,15
Tomography
79
0,15
Interventional radiology and cardiology
114
1,10
Nuclear medicine
33
0,44
Radiation therapy
68
0,2
Other
408
0,25
Medical support staff
191
 
X-ray diagnostics
52
0,25
Interventional radiology and cardiology
27
0,55
Nuclear medicine
18
0,3
Radiation therapy
26
0,2
Other staff, overall
68
0,16
Industrial objects
2 379
 
Nuclear industry
2 269
0,30
Radiography
81
0,21
Other 29
0,1
Education and research institution
158
0,08
Other 292
0,09
Total
6 307
 
* In the table data is shown according to the workers title of position at the workplace (equivalent doses of Hp (10) are used).

In the medical field, the highest doses are received by the specialists of interventional radiology and cardiology similarly as in previous years due to the particularity of their work. Highest dose recorded for specialists of interventional radiology and cardiology is 12,19 mSv.
In nuclear industry the highest annual occupational dose in 2016 was 11,77 mSv.
 
 
FORMS OF APPLICATIONS AND REPORTS
 
The order No. V-675 of the Minister of Health, adopted on 24th August 2009, On the Procedure of Data about Ionizing Radiation Sources and Workers Working with Ionizing Radiation Sources Submission to the State Register of Ionizing Radiation Sources and Occupational Exposure, defines information which licensees must submit to the Register.
 

License holders must submit:

 

  • Announcement on worker, who works with the sources of ionizing radiation (11 attachment).

It must be submitted within 10 working days when worker has started or finished activities with sources, when any condition of work with sources has changed or when personal worker’s information has changed.

 

  • Announcement on worker, who works with the sources of ionizing radiation, exposure (12 attachment).

It must be submitted each year until 30th of March.

If Radiation Protection Centre assesses the exposure of workers, this announcement is not required.

Other license holders must submit announcement by themselves or they may delegate this to laboratory which assesses the exposure of their workers and which is approved by the order of Ministry of Health.

 
 


Last update 2017-07-03

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