使用受污染生物质的沼气站操作员的暴露情况。

EXPOSURE OF THE BIOGAS STATION OPERATORS WORKING WITH CONTAMINATED BIOMASS.

作者信息

Škrkal Jan, Možnar Radim, Kajan Miroslav, Fantínová Karin

机构信息

SÚRO, v.v.i. (National Radiation Protection Institute), Bartoškova 28, 14000 Prague, Czech Republic.

Enki, o.p.s., Dukelská 145, 379 01 Třeboň, Czech Republic.

出版信息

Radiat Prot Dosimetry. 2019 Dec 31;186(2-3):326-331. doi: 10.1093/rpd/ncz227.

DOI:10.1093/rpd/ncz227

PMID:31702771

Abstract

The article deals with evaluation of irradiation of an operator of a 1 MW biogas station (BGS), processing silage plant biomass contaminated by 137Cs and 134Cs. External irradiation and internal irradiation by the means of aerosol particles inhalation were considered. For calculation of the external irradiation, a BGS model was created in the MCNP. The calculated total committed effective doses received by the operator during annual handling of biomass contaminated by 1 kBq per kg of 137Cs or 134Cs were 34 or 69 μSv, respectively. Three scenarios of contamination were evaluated: freshly contaminated silage after model accident, silage right after the Chernobyl accident and at the current radiation situation in the Czech Republic.

摘要

本文探讨了一座1兆瓦沼气站（BGS）操作人员的辐射剂量评估，该沼气站处理受137Cs和134Cs污染的青贮植物生物质。考虑了外部辐射和气溶胶颗粒吸入导致的内照射。为计算外部辐射剂量，在MCNP中创建了沼气站模型。计算得出，操作人员在每年处理每千克含1 kBq 137Cs或134Cs的受污染生物质时，所接受的总累积有效剂量分别为34或69 μSv。评估了三种污染情况：模型事故后新受污染的青贮饲料、切尔诺贝利事故刚发生后的青贮饲料以及捷克共和国当前的辐射状况。