RASCAL software-based impact assessment of public dose from radionuclides discharged via different release paths in the aftermath of nuclear power plant accident
10.3760/cma.j.issn.0254-5098.2016.10.010
- VernacularTitle:基于RASCAL软件的核电厂事故后放射性核素不同释放途径对公众剂量的影响
- Author:
Ruiping GUO
;
Chunlin YANG
;
Haiying CHEN
;
Chunming ZHANG
- Publication Type:Journal Article
- Keywords:
Public health;
Radiation dose;
Radioactive environment impact;
Release path;
LTSBO accident
- From:
Chinese Journal of Radiological Medicine and Protection
2016;36(10):765-769
- CountryChina
- Language:Chinese
-
Abstract:
Objective To identify the effects of different release paths on public dose in the aftermath of a NPP accident.Methods RASCAL4.3 software was used to simulate the source terms of PWR NPPs and the characteristics of dose distribution in different release path scenarios of long term station blackout (LTSBO) accident.Results It had been shown that radioactivity was the highest in Scenario 2,which was the release path for releases of radionuclides into the environment due to steam generator tube rupture.Radioactivity was the lowest in Scenario 1,which was the release path for radionuclides to be released into the environment in the case of containment leakage or failure.TEDE dose was mainly distributed in the region within 40 km of the release point in different scearios.TEDE dose in the most sectors within 80 km was low than 10 mSv in Scenario 1,which was the release path via containment in containment leakage or failure and in Scenario 3,which was the release path by containment bypass.It was greater than 50 mSv in Scenario 2,which was the release path due to steam generator tube rupture.Conclusions For the environmental impact assessment,it should be paid more attention to the fact that the public health impact imposed by radionuclide release into the environment via the release path due to steam generator tube rupture in the aftermath of LTSBO accident at a NPP.
