Preliminary Evaluation of Radiological Impact for Domestic On-road Transportation of Decommissioning Waste of Kori Unit 1

Dho, Ho-Seog; Seo, Myunghwan; Kim, Rin-Ah; Kim, Tae-Man; Cho, Chun-Hyung

doi:10.7733/jnfcwt.2020.18.4.537

Cited by 2 publications

(3 citation statements)

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“…First, a transport link was selected, and the transportation scenarios under normal and accident conditions for the transportation of RPV waste were assumed. The number of annual shipments was assumed to be 40 times in consideration of the storage capacity in the Gyeongju disposal facility [13].…”

Section: Transportation Scenariomentioning

confidence: 99%

“…In addition, the passability of bridges and tunnels and other vehicle passage restrictions were reflected. The selected transport link was divided into six segments by considering road type and population density [13].…”

Section: Transport Linkmentioning

confidence: 99%

“…The Nuclear Regulatory Commission (NRC) conducted a radiological safety assessment for the transportation of radioactive waste, reflecting the characteristics of many NPPs [12]. Dho et al conducted a radiological safety assessment for the transportation of the general radioactive waste from Kori Unit 1 to the Gyeongju disposal facility [13]. Seo et al conducted a radiological safety assessment for the transportation of radioisotope (RI) waste temporarily stored at KAERI to the Gyeongju disposal facility [14].…”

Section: Introductionmentioning

confidence: 99%

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Radiological safety assessment for transportation of reactor pressure vessel during decommissioning of a nuclear power plant in Korea

Kwak,

Kim,

et al. 2024

J. Radiol. Prot.

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In Korea, decommissioning of NPPs and transportation of the decommissioning waste are expected to expand in the near future. It is necessary to confirm that radiological risks to the public and workers are not significant through radiological safety assessment. The objective of this study is to assess the radiological safety for transportation of RPV waste, which is a major decommissioning waste with relatively high level of radioactivity. It was assumed that the waste would be tranported to the Gyeongju disposal facility by land transportation. First, the source term and transportation method of the RPV waste were determined, and the external dose rates from the waste were calculated using MCNP. Then, transportation scenarios were assumed under both normal and accident conditions. Under the scenarios, radiation doses were calculated using the RADTRAN. Under normal operation scenarios without a transportation accident, assuming 40 shipments per year, the average individual doses for the public ranged from 6.56×10-6 to 2.18×10-2 mSv yr-1. The maximum invidual doses for only a single shipment ranged from 2.43×10-6 to 3.14×10-1 mSv. For cargo handlers and vehicle crew members, the average doses were 2.26×101 mSv yr-1 and 2.95 mSv yr-1, respectively. Under transportation accident scenarios, average individual radiological risks which are product of the radiation doses and the annual accident rates ranged from 1.14×10-11 to 1.61×10-10 mSv yr-1 by transportation route segment when considering the transportation accident rate. Average individual doses assuming transportation accident occurrence ranged from 2.62×10-4 to 1.42×10-3 mSv. The maximum individual dose under accident conditions was 7.99×10-2 mSv. The calculated doses were below the regulatory limits in Korea. However, relatively high doses were observed for cargo handlers and vehicle crew members because of conservative assumptions. This study results can be used as basic data for the radiological safety assessment for the decommissioning waste transportation in the future.

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Section: Transportation Scenariomentioning

confidence: 99%

Section: Transport Linkmentioning

confidence: 99%