The radiation conditions at a ship repair yard in Bukhta Chazhma after a nuclear accident on a submarine on August 10, 1985 were reconstructed by means of hindcasting taking into account a 3D model of the enterprise and dose rate measurements during the first few days after the accident. The submarine presented the greatest danger during the first few days. The dose rate was equal to 1500–2500 mSv/h at height 3–5 m above the reactor compartment, 1–130 mSv/h on the hull, and 5–20 mSv/h at 100–130 m from the boat; the β-contamination was equal to 10 5 –10 6 particles/(cm 2 ·min). The radioactive substances were conservatively estimated to have propagated from the accident site to 0.9–1 km. Levels above 0.6 μSv/h, which are inadmissible for the population, did not go beyond 0.7–0.8 km and remained within the sanitary-protection zone. A radioactive track with dose rate 0.5–1.2 mSv/h and β-contamination to 2·10 5 particles/(cm 2 ·min) formed in the northern part of the yard, exceeded its borders, and crossed the uninhabited Dunai peninsula. The adjoining settlements of Dunai and Razboinik did not suffer; the radiation conditions on their territories were characterized as background.

中文翻译：

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核事故中心和 Bukhta Chazhma 修船厂区域的放射性污染

1985 年 8 月 10 日，一艘潜艇发生核事故后，Bukhta Chazhma 的一个修船厂的辐射条件是通过后报重建的，同时考虑了事故后最初几天的企业 3D 模型和剂量率测量结果. 在最初的几天里，潜艇表现出最大的危险。剂量率在反应堆隔间上方 3-5 m 高度处为 1500-2500 mSv/h，在船体上为 1-130 mSv/h，在离船 100-130 m 处为 5-20 mSv/h；β-污染等于10 5 –10 6 个粒子/(cm 2 ·min)。保守估计放射性物质已从事故现场传播到 0.9-1 公里。高于 0.6 μSv/h 的水平对于人群来说是不可接受的，但并未超出 0.7-0.8 公里并保持在卫生保护区内。在院子的北部形成了剂量率为 0.5–1.2 mSv/h 和 β 污染为 2·10 5 粒子/(cm 2 ·min) 的放射性轨迹，越过其边界，穿过无人居住的都奈半岛。毗邻的 Dunai 和 Razboinik 定居点没有受到影响；他们领土上的辐射条件被定性为背景。