Radioactive dispersion model for Tehran research reactor and radioisotope laboratory stacks

Sadeghi, Nahid; sajadi, Hossein; Salartash, Ramin

doi:10.1109/iceea.2010.5596133

Cited by 2 publications

(2 citation statements)

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“…While the measurement result of airborne radioactivity in the reactor stack by using HI-Volume Air Sampler shows the average gross beta radioactivity is 6.15 × 10 -8 Bq/cm 3 , this value is far below the limiting value stated in SAR of Kartini reactor i.e. 4 × 10 -5 Bq/cm 3 (2) , and conform with the requirements for research reactor in general (11,12) . While, a survey on the demography and population conditions surrounding the Kartini reactor site was done for 2003 -2008 period.…”

Section: Gaseous Releases Evaluation and Safety Performance Improvemesupporting

confidence: 51%

Gaseous Releases Evaluation and Safety Performance Improvement of Kartini Research Reactor Ventilation System

Syarip¹,

Susyanta²,

Kusuma³

2012

gnd

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GASEOUS RELEASES EVALUATION AND SAFETY PERFORMANCE IMPROVEMENT OF KARTINI RESEARCH REACTOR VENTILATION SYSTEM. The safety performance of Kartini research reactor related to the gaseous releases to the environment has been evaluated. The research covers an evaluation and improvement on the ventilation system and analysis of gas releases dissipating from the reactor building. The method used is calculation of reactor source term and direct measurement of gas release from the reactor stack. The source term analysis showed that the fission product accumulated in the reactor core at the start of operation was 4.838 ´ 106 Ci, after of 5 hours operation it became 3.614 ´ 108 Ci, and after 24 hours decay, the fission product became 4.727 ´ 106 Ci. The N16 activity inside the reactor building is 4.1 ´ 10-10 μCi/cm3 and the Ar41 escaping to the atmosphere is 5.7 ´ 10-12 mCi/cm3, which is lower than limit value for radiation worker of 2 ´ 10-6 μCi/cm3. A sample case by using March 2009 data, the value of ground level concentration on variable distance x = 100 m to 5.000 m, was 9.726 ´ 10-19 rad/m3, rise up to 6.303 ´ 10-14 rad/m3 and tends to decrease to 1.598 ´ 10-15 rad/m3 at distance 5,000 m. Whiles the direct observation on the upper reactor stack show that the radiation exposure is 2.33 ´ 10-9 rad/s, exit velocity of gas from stack is 8 m/s, absolute temperature effluent of gas is 26.2 oC, and outlet diameter of stack, d = 1 m and actual stack height 31.75 m. Based on safety limit criteria from national regulation (BAPAETEN), the values of radiation exposure, ground level concentration combined with atmosphere stability and demography factor was very safe for the actual condition of Kartini reactor site. Keywords: safety performance, Kartini reactor, source term, ventilation system.

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Section: Gaseous Releases Evaluation and Safety Performance Improvemesupporting

confidence: 51%

Gaseous Releases Evaluation and Safety Performance Improvement of Kartini Research Reactor Ventilation System

Syarip¹,

Susyanta²,

Kusuma³

2012

gnd

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“…13 The main released radionuclide materials from BNPP in a nuclear accident are listed in Table 1. 7,13,14…”

Section: Hypothetical Nuclear Accidentmentioning

confidence: 99%

Cancer risk incidence from hypothetical accident of VVER-1000 nuclear power plant based on BEIR VII model

2018

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BackgroundSafety is a mandatory issue during the operation of a nuclear power plant. A nuclear reactor can have some atmospheric dispersion due to any errors in the safety system.PurposeThe aim of this study is to estimate the cancer risk incidence for different body organs due to accidentally released radionuclides from Bushehr Nuclear Power Plant (BNPP).Materials and methodsThe assumed hypothesis was atmospheric dispersion of radionuclide into the environment due to the safety failure of BNPP. Total effective dose equivalent (TEDE) from radionuclide diffusion in the medium was calculated using HOTSPOT code at two different wind speeds. Finally, the risk of cancer incidence for different organs of male and female sex has been estimated by Biologic Effects of Ionizing Radiation (BEIR) VII model.ResultsThe results showed that with increasing the exposure age and attained age, the risk of cancer incidence for different organs is decreased. The value of TEDE was increased at lower wind speed. The most probable organ for cancer incidence at different levels of TEDE in male and female sex was colon and bladder, respectively. On the other hand, prostate and uterus had the lowest radiation sensitivity and cancer risk incidence in male and female sex, respectively. Increasing the wind speed reduces the risk of cancer incidence for all of organs understudy.ConclusionBased on the obtained results, it can be concluded that the younger persons are more subject to the cancer risk incidence because of both the intrinsically greater radio-sensitivity of their organs and their longer remaining life expectancy during which a cancer may develop. The overall risk of cancer incidence as well as the site specific solid cancer incidence were highly dependent to the sex of exposed person, so that the female sex was more exposed to the cancer risk incidence at all of the irradiation levels understudy.

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Radioactive dispersion model for Tehran research reactor and radioisotope laboratory stacks

Cited by 2 publications

References 0 publications

Gaseous Releases Evaluation and Safety Performance Improvement of Kartini Research Reactor Ventilation System

Gaseous Releases Evaluation and Safety Performance Improvement of Kartini Research Reactor Ventilation System

Cancer risk incidence from hypothetical accident of VVER-1000 nuclear power plant based on BEIR VII model

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