International Conference on Occupational Radiation Protection: Strengthening Radiation Protection of Workers – Twenty Years of Progress and the Way Forward

Monitoring and Dose Assessment of Occupational Radiation Protection Exposures – the Nigerian Perspective

Not scheduled

1h 30m

Geneva

Poster 3. Monitoring and dose assessment of occupational radiation exposures Session 2. Monitoring and dose assessment of occupational radiation exposures

Speaker

Dr Yau Idris (Nigerian Nuclear Regulatory Authority)

Description

Monitoring and Dose Assessment of Occupational Radiation Protection Exposures – the Nigerian Perspective

Planned, emergency, and existing exposure situations resulting in occupational exposure, requiring appropriate optimization of protection for doses reduction [1]. Effective monitoring of radiation workers involving use of ionizing radiation by NNRA has improved Radiation Protection in Nigeria [2]. The NNRA assesses external exposures of workers through DSPs from 2012 to 2020, with deployment of dosimeters. The AEDs of radiation workers from practices ranges (0.31-2.48)mSv/yr for 2012, (0.3 – 1.44) mSv/yr for 2013, (0.14 – 2.34) mSv/yr for 2014, (0.23 – 2.42) mSv/yr for 2015 and (0.04 – 2.07) mSv/yr for 2016, (0.08-1.64) mSv/yr for 2017, (0.05-2.34) mSv/yr for 2018, (0.38-1.28) mSv/yr for 2019 and (0.06-0.79) mSv/yr for 2020, while average AED ranges between (0.28 to 1.24) mSv/yr from 2012 to 2020 with overall average of 0.81 mSv/yr for 9 years under review, which are all presented in Table 1, Figures 1& 2. The evaluated AED were found below of 20 mSv/yr limits, which by implication shows no radiological hazards to workers in Nigeria [3,4].
Nigeria
Males
Primary author(s): YAU, Idris (Dr.): SAMBO, Isa (Dr.): EKONG, Godwin (Dr.)
Co-author(s): YAU, Idris (Nigeria): SAMBO, Isa (Nigeria): EKONG, Godwin (Nigeria);
Presenter(s): YAU, Idris (Dr.)
Track Classification: Monitoring and Dose Assessment of Occupational Radiation Protection Exposures
Contribution Type: Oral Presentation
Submitted by EKONG, Godwin on 30th November 2021

Key words: Radiation Protection, Occupational dose, radiation exposures, effective dose
REFERENCES
[1]. International Commission on Radiological Protection (ICRP), 2007. 2007 recommendations of ICRP Publication 103. Ann. ICRP 37(2–4).
[2]. Nigerian Nuclear Regulatory Authority (NNRA) (2004). Nuclear Safety and Radiation Protection, Act 19, 1995, Law of Nigeria, Cap N145.
[3]. Nigerian Nuclear Regulatory Authority (NNRA) (2004). Nigerian Basic Ionizing Radiation Regulations (NIBIRR) 2003, Law of Nigeria, Cap N145.
[4]. Martin A., (2012). An Introduction Radiation Protection. Fifth Edition, Hodder Arnold, imprint of Hodder Education, Hachette UK, 6 -209.
• AED - Annual Effective Doses; NNRA - Nigerian Nuclear Regulatory Authority; DSPs - Dosimetry Service Providers

Table 1: AED of all practices for 2012 to 2020
PRACTICES
/YEAR (mSv) ED 2012 ED 2013 ED 2014 ED 2015 ED 2016 ED 2017 ED 2018 ED 2019 ED 2020
Ind. Rad. 0.57 0.54 0.5 1.1 0.78 1.14 1.61 1.28 0.34
Nuc. Guage 1.26 0.71 0.25 0.64 1.15 0.63 1.39 0.89 0.79
Well Logging 0.34 0.3 0.14 2.42 0.85 Nil 1.43 0.5 0.19
GIF 0.95 0.86 Nil 1.45 2.07 1.64 1.9 0.38 Nil
Diag. Rad 1.1 0.47 1.64 1.41 0.58 0.6 0.34 Nil 0.17
Radiotherapy 1.22 0.35 0.55 0.92 0.41 0.08 Nil 0.5 0.06
Nuc. Med Nil Nil Nil 1.84 0.04 Nil 2.34 1.17 0.16
Res. Reactor 2.48 1.44 2.34 1.11 1.86 1.33 1.18 1.27 0.79
Activities 0.31 0.4 0.36 0.23 0.15 0.42 0.05 0.47 0.21
Range 0.31-2.48 0.3-1.44 0.14-2.34 0.23-2.42 0.04-2.07 0.08-1.64 0.05-2.34 0.38-1.28 0.06-0.79
Average AED 1.03 0.63 0.64 1.24 0.88 0.65 1.14 0.72 0.30

Figure 1: AED of practices for 2012 to 2020

Figure 2: Comparism of AED for 2012 to 2020

Presentation materials

IAEA-CN-300-#13.pdf