Activities in C&I in Nuclear Field Activities in C&I in Nuclear Field

General Overview

22nd Meeting of the IAEA Technical Working Group on Nuclear Power Plant Control and Instrumentation, Vienna on May 20-22, 2009.

S ROKITAS ROKITA

NATIONAL NUCLEAR REGULATOR

ContentsContents

Introduction Licensing Activities New NPPs - future

development MDEP

Licensing activities in the nuclear industry in South Africa concentrates on the following programs:

Koeberg Nuclear Power Station

Nuclear Energy Corporation (NECSA)

Pebble Bed Modular Reactor (PBMR)

Licensing of new Nuclear Power Plant

Introduction Introduction

Koeberg Nuclear Power Koeberg Nuclear Power Station Station

Projects completed to date:

Simulator upgrade

Changes to Reactor Protection System and system testers

Fuel handling system upgrade

Upgrade of instrumentation of the Spent Fuel Pool following installation of high density racks.

Koeberg Nuclear Power Koeberg Nuclear Power Station Station

Projects completed to date:

Digital Turbine Protection and Turbine Control System

Digital AVR system

RGL (Control rods) system upgradeRodPilot section;Control Logic section;Processing Logic section; Control Room interface

Projects currently under way

CP-1 alignment modifications – further modification/safety improvements currently in different stages of implementation (as a result of periodic safety reassessment).

RCP overpressure protection

Station Blackout modifications (SBO and CCF of LHx- essential boards)

Emergency RCP Seal Supply (ESS) New Power supply for ESS (DGs) New Power supply for Train A & B DC systems (DGs)

Koeberg Nuclear Power Koeberg Nuclear Power Station Station

New projects

New Simulator

Relocation of ACACIA Power Station (upgrade of auto start system)

New Fuel Transfer system

Koeberg Nuclear Power Koeberg Nuclear Power Station Station

Control Room HMI

GSE / GRE

Vibration Monitoring

RGL Rod Control

AVR HV Network

Discrete Acquisition

Relaying HV Control Room

Acacia Auto Start

SHY H2 Plant

JDT Fire Detection

KRT Rad. Monitoring

KKO Event Recorder

LHj D/G Monitoring

Drain Down

KRGKPR Panel HMI

Interface Analogue Acquisition

ECCHMI

EDSLAN Application

Historian Level 3 Processing

Flux Mapping

Sub-cooling Monitor

InterfaceInterfaceInterface Interface Interface Interface Interface Interface

Interface InterfaceKRG

Koeberg Nuclear Power Koeberg Nuclear Power Station Station

Koeberg Nuclear Power Koeberg Nuclear Power Station Station

Upgrade of Reactor Protection System of Safari- 1 research reactor further delayed

PBMR Fuel Manufacturing – pilot plant. The First fuel kernels manufactured and currently undergoing testing

PBMR Research facility for fuel irradiation and testing – under development

NECSANECSA

PBMRPBMR

PBMR overall licensing process

In term of the complexity of the PBMR Project a multi

stage licensing approach has been adopted for

licensing the PBMR Reactor

Each stage of the licensing process to be supported by a safety case submitted by the applicant to NNR

First stage is for the approval ( or otherwise) of the site preparation and construction phase

Licensing schedule has been updated by Eskom – original first stage (construction) was expected towards first quarter of 2007

PBMRPBMR

CURRENT STATUS OF LICENSING ACTIVITIES

The development of initial design of single loop

helium cooled 400MWth plant has been put “on

hold”. All efforts now to complete all outstanding

licensing issues The NNR received a proposal for licensing of new

design of 2 and 3 loops helium/steam cooled

reactor. Discussion taking place on licensing approach for

new design (design certification process).

MDEP InitiativeMDEP Initiative

MDEP – Multinational Design Evaluation Programme

Initiative of US NRC Stage 2 – Establish referenced regulatory practices

and regulations to enhance safety of new designs - existing design specific working groups (AP-1000,

EPR). - The NNR proposed new High temperature Gas

Cooled Reactors working group - Issue specific working group – Digital

Instrumentation & Control Stage 3 – implementation of outcome of stage 2 in

review of generation IV designs

New NPPNew NPP

Future development

In 2006 South African Government announced plans for second Nuclear Power Station.

Nuclear Power Plant with capacity of 3 000 MW will be built in the southern part of the country by Eskom.

2 x EPR 1600 or 3 x AP-1000 units have been considered – tendering process was completed and outcome presented to Eskom Board.

Due to bad political climate and development on international financial market Eskom Board decided to shelf current project.

New NPPNew NPP

Future development

Nuclear Sitting Project currently under way in preparation for future nuclear programme expansion

NNR is involved with licensing of 3 nuclear sites.

South African Government set-up a committee to evaluate different reactor designs

New NPPNew NPP

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Kronos

Aries

Helios

Juno

Aurora

Koeberg

Philippi

Muldersvlei

BacchusProteus

Droerivier

HydraGariep

Van der Kloof

Aggeneis

Poseidon

Grassridge

Beta

Key

400kV substation

Hydro-Electric station

Gas turbine station

Nuclear station

400kV line

765kV line

Acacia

PalmietAcacia

Pumped storage scheme

Perseus

Recommendations to the IAEA on future activities

Cooperation/information exchange with MDEP WG. (outcome of comparison of IEC/IEEE standards,

countries common position on software common cause failure, software tools, software V&V). Not all TWG members have an access to MDEP library

Quantification of Software Reliability Licensing, qualification requirements, acceptance

criteria of COTS systems used in important to safety but not safety related systems

Classification of I&C systems/components for new designs