PRINCIPLES OF ENVIRONMENTAL IMPACT ASSESSMENT

NPP INTERACTIONS WITH ITS ENVIRONMENT

ENVIRONMENTAL IMPACT OF NUCLEAR POWER PLANTS

© EDF – Matthieu Colin

Noise baseline

NOISE IMPACT ASSESSMENT

Baseline noise measurements are made on the NPP area, at boundary of site and at the nearest habitations to : - characterize sound emissions of equipments

- determine sound level at measurement points - validate digital models

Noise impact assessment Acoustic modelling with Code Tympan : simulation of the propagation of industrial noise in the environment

Fauna, flora

Human activities

Soil

Surface water

Radioecology

Air and climatic factors

Population Wastes

Chemical products

Nuclear fuel

Water abstract

Gaseous Discharges

(radioactive, chemical)

Electricity

Noise & vibrations, Light

emissions, Socio economics,

Land use, Ecology, Protected

species ….

Operational wastes

(radioactive & non radioactive)

Liquid Discharges

(radioactive, chemical, thermal)

Ce document est la propriété d’EDF SA. Toute communication, même partielle, est interdite sauf autorisation.

Sébastien LESTERLE - EDF – DPNT – DIPDE – D2ED - SE

Noise mitigation - digital models allow to locate and prioritize the main sound sources and to define soundproofing objective - soundproofing measures are then implemented (example : modification of the design of the main “contributor” equipment)

Plume

InhalationDeposit

Plume

Soil exposition

Beach sedimentsSea water

Ingestion

Fishery products

Gaseousreleases

Liquidreleases

Ingestion

Inhalation

milk

meat

vegetable

NPP NPP

RADIOLOGICAL IMPACT ASSESSMENT

TO THE PUBLIC

Calculation of the annual effective dose to the representative person (Sv/year)

=> comparison to the limit dose value for the public (1 mSv/y)

Objective to assess the radiological impacts to the public due to radioactive discharges (gaseous &

liquid) and direct radiation

Identification of the human exposure pathways Realistic assumptions of the behaviour and dietary patterns of representative members exposed public are taken into account Transfers of radionuclides in the environment to the human people are assessed using the modelling platform SYMBIOSE .

CHEMICAL DISCHARGES HEALTH IMPACT ASSESSMENT

Inventory of all substances in chemical discharges Selection of the chemical substances to be adressed

Hazard identification and Dose-response assessment

For selected substances, relationship

between dose of chemicals and incidence of adverse health effects

Exposure assessment

Characterization of magnitude, frequency and duration of chemicals

exposure (Habits data, food consumption rates,…)

Risk characterization

Estimating the potential for adverse health effects by integrating the

information from the dose-response assessment with the exposure

assessment consumption rates, …)

© EDF – Martina Cristofani

IMPACT OF CHEMICALS ON THE AQUATIC

ENVIRONMENT

• A single substance approach • Definition of the discharges scenarios / two scenarios studied : - representative of the means and the high impacts • Comparison between cumulative concentrations and relevant water quality standards

1

2

Comparison of PEC to relevant benchmark (CQEL water quality grid, ecotoxicological value, PNEC) > If water quality changes or PEC/PNEC >1 or PEC > ecotox value => step 2

Need of further justification (e. g. indepth analysis of ecotoxicological data, use of ecological surveys)

© EDF – Philippe Eranian