1
|
Azizova TV, Bannikova MV, Grigoryeva ES, Briks KV, Hamada N. Mortality from various diseases of the circulatory system in the Russian Mayak nuclear worker cohort: 1948-2018. JOURNAL OF RADIOLOGICAL PROTECTION : OFFICIAL JOURNAL OF THE SOCIETY FOR RADIOLOGICAL PROTECTION 2022; 42:021511. [PMID: 35023506 DOI: 10.1088/1361-6498/ac4ae3] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 01/12/2022] [Indexed: 06/14/2023]
Abstract
This paper reports on the findings from the study of mortality from diseases of the circulatory system (DCS) in Russian nuclear workers of the Mayak Production Association (22 377 individuals, 25.4% female) who were hired at the facility between 1948 and 1982 and followed up until the end of 2018. Using the AMFIT module of the EPICURE software, relative risks (RRs) and excess RRs per unit absorbed dose (ERR/Gy) for the entire Mayak cohort, the subcohort of workers who were residents of the dormitory town of Ozyorsk and the subcohort of migrants from Ozyorsk were calculated based on maximum likelihood. The mean cumulative liver absorbed gamma-ray dose from external exposure was 0.45 (0.65) Gy (mean (standard deviation)) for men and 0.37 (0.56) Gy for women. The mean cumulative liver absorbed alpha dose from internal exposure to incorporated plutonium was 0.18 (0.65) Gy for men and 0.40 (1.92) Gy for women. By the end of the follow-up, 6019 deaths with DCS as the main cause of death were registered among Mayak Production Association workers (including 3828 deaths in the subcohort of residents and 2191 deaths in the subcohort of migrants) over 890 132 (622 199/267 933) person-years of follow-up. The linear model that took into account non-radiation factors (sex, attained age, calendar period, smoking status and alcohol drinking status) and alpha radiation dose (via adjusting) did not demonstrate significant associations of mortality from DCS, ischaemic heart disease (IHD) and cerebrovascular disease with gamma-ray exposure dose in the entire cohort, the resident subcohort or the migrant subcohort (either in men or women). For the subcohort of residents, a significant association with gamma dose was observed for mortality from ischaemic stroke in men with ERR/Gy = 0.43 (95% CI 0.08; 0.99); there were no significant associations with liver absorbed gamma dose for any other considered outcomes. As for internal exposure, for men no significant associations of mortality from any DCS with liver absorbed alpha dose were observed, but for women positive associations were found for mortality from DCS (the entire cohort and the resident subcohort) and IHD (the entire cohort). No significant associations of mortality from various types of DCS with neutron dose were observed either in men or women, although neutron absorbed doses were recorded in only 18% of the workers.
Collapse
Affiliation(s)
- Tamara V Azizova
- Clinical Department, Southern Urals Biophysics Institute, Ozyorsk Chelyabinsk Region, Russia
| | - Maria V Bannikova
- Clinical Department, Southern Urals Biophysics Institute, Ozyorsk Chelyabinsk Region, Russia
| | - Evgeniya S Grigoryeva
- Clinical Department, Southern Urals Biophysics Institute, Ozyorsk Chelyabinsk Region, Russia
| | - Ksenia V Briks
- Clinical Department, Southern Urals Biophysics Institute, Ozyorsk Chelyabinsk Region, Russia
| | - Nobuyuki Hamada
- Radiation Safety Unit, Biology and Environmental Chemistry Division, Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Tokyo, Japan
| |
Collapse
|
2
|
Vostrotin VV, Napier BA, Zhdanov AV, Miller SC, Sokolova AB, Bull RK, Suslova KG, Efimov AV, Smith MA, Vvedensky VE. THE MAYAK WORKER DOSIMETRY SYSTEM (MWDS-2016): INTERNAL DOSIMETRY RESULTS AND COMPARISON WITH MWDS-2013. RADIATION PROTECTION DOSIMETRY 2019; 184:201-210. [PMID: 30496515 DOI: 10.1093/rpd/ncy200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 10/22/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
Differences in results from the new Mayak Worker Dosimetry System (MWDS-2016) vs the previous MWDS-2013 are described. Statistical characteristics are shown for the distribution of accumulated absorbed doses to organs for 8340 workers with bioassay data. Differences in mean values of accumulated doses and their relative standard uncertainties calculated by MWDS-2016 and MWDS-2013 were analysed separately for various types of industrial compounds of plutonium, specifically nitrates, mixtures and oxides. Within the range of accumulated doses >1 mGy, lung doses for nitrates and mixtures decreased by 41 and 15%, respectively, and remained at the same level for oxides. Accumulated liver doses within the range >1 mGy increased for nitrates and mixtures by 13 and 8%, respectively, and decreased for oxides by 7%.
Collapse
Affiliation(s)
- Vadim V Vostrotin
- Southern Urals Biophysics Institute (SUBI), Ozyorskoe Shosse 19, Ozyorsk, Chelyabinsk Region, Russia
| | - Bruce A Napier
- Pacific Northwest National Laboratory, Richland, WA, USA
| | - Alexei V Zhdanov
- Southern Urals Biophysics Institute (SUBI), Ozyorskoe Shosse 19, Ozyorsk, Chelyabinsk Region, Russia
| | | | - Alexandra B Sokolova
- Southern Urals Biophysics Institute (SUBI), Ozyorskoe Shosse 19, Ozyorsk, Chelyabinsk Region, Russia
| | | | - Klara G Suslova
- Southern Urals Biophysics Institute (SUBI), Ozyorskoe Shosse 19, Ozyorsk, Chelyabinsk Region, Russia
| | - Alexander V Efimov
- Southern Urals Biophysics Institute (SUBI), Ozyorskoe Shosse 19, Ozyorsk, Chelyabinsk Region, Russia
| | | | - Vladimir E Vvedensky
- Southern Urals Biophysics Institute (SUBI), Ozyorskoe Shosse 19, Ozyorsk, Chelyabinsk Region, Russia
| |
Collapse
|
3
|
Napier BA. THE MAYAK WORKER DOSIMETRY SYSTEM (MWDS-2013): AN INTRODUCTION TO THE DOCUMENTATION. RADIATION PROTECTION DOSIMETRY 2017; 176:6-9. [PMID: 28338990 PMCID: PMC5927475 DOI: 10.1093/rpd/ncx020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 01/23/2017] [Accepted: 03/14/2017] [Indexed: 05/29/2023]
Abstract
The reconstruction of radiation doses to Mayak Production Association workers in central Russia supports radiation epidemiological studies for the U.S.-Russian Joint Coordinating Committee on Radiation Effects Research. The most recent version of the dosimetry was performed with the Mayak Worker Dosimetry System-2013. This introduction outlines the logic and general content of the series of articles presented in this issue of Radiation Protection Dosimetry. The articles summarize the models, describe the basis for most of the key decisions made in developing the models and present an overview of the results.
Collapse
Affiliation(s)
- B A Napier
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA,USA
| |
Collapse
|
4
|
Vostrotin V, Birchall A, Zhdanov A, Puncher M, Efimov A, Napier B, Sokolova A, Miller S, Suslova K. The Mayak Worker Dosimetry System (MWDS-2013): Internal Dosimetry Results. RADIATION PROTECTION DOSIMETRY 2017; 176:190-201. [PMID: 27664431 DOI: 10.1093/rpd/ncw268] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 08/15/2016] [Accepted: 08/29/2016] [Indexed: 06/06/2023]
Abstract
The distribution of calculated internal doses has been determined for 8043 Mayak Production Associate (Mayak PA) workers. This is a subset of the entire cohort of 25 757 workers, for whom monitoring data are available. Statistical characteristics of point estimates of accumulated doses to 17 different tissues and organs and the uncertainty ranges were calculated. Under the MWDS-2013 dosimetry system, the mean accumulated lung dose was 185 ± 594 mGy (geometric mean = 28 mGy; geometric standard deviation = 9.32; median value = 31 mGy; maximum value = 8980 mGy). The ranges of relative standard uncertainty were from 40 to 2200% for accumulated lung dose, from 25-90% to 2600-3000% for accumulated dose to different regions of respiratory tract, from 13-22% to 2300-2500% for systemic organs and tissues. The Mayak PA workers accumulated internal plutonium lung dose is shown to be close to log normal. The accumulated internal plutonium dose to systemic organs was close to a log triangle. The dependency of uncertainty of accumulated absorbed lung and liver doses on the dose estimates itself is also shown. The accumulated absorbed doses to lung, alveolar-interstitial region, liver, bone surface cells and red bone marrow calculated both with MWDS-2013 and MWDS-2008 have been compared. In general, the accumulated lung doses increased by a factor of 1.8 in median value, while the accumulated doses to systemic organs decreased by factor of 1.3-1.4 in median value. For the cases with identical initial data, accumulated lung doses increased by a factor of 2.1 in median value, while accumulated doses to systemic organs decreased by 8-13% in median value. For the cases with both identical initial data and all of plutonium activity in urine measurements above the decision threshold, accumulated lung doses increased by a factor of 2.7 in median value, while accumulated doses to systemic organs increased by 6-12% in median value.
Collapse
Affiliation(s)
- Vadim Vostrotin
- Southern Urals Biophysics Institute, Ozersk, Chelyabinsk Region, Russia
| | - Alan Birchall
- Global Dosimetry Ltd. 1 Macdonald Close, Didcot, Oxfordshire, OX11 7BH, UK
| | - Alexey Zhdanov
- Southern Urals Biophysics Institute, Ozersk, Chelyabinsk Region, Russia
| | - Matthew Puncher
- Public Health England (PHE), Chilton, Didcot, Oxfordshire, OX11 0RQ, UK
| | - Alexander Efimov
- Southern Urals Biophysics Institute, Ozersk, Chelyabinsk Region, Russia
| | - Bruce Napier
- Pacific Northwest National Laboratory, Richland, WA, USA
| | | | | | - Klara Suslova
- Southern Urals Biophysics Institute, Ozersk, Chelyabinsk Region, Russia
| |
Collapse
|