Embalse PLiM/PLExOverview

Second International Symposium on Nuclear Power Plant Life Second International Symposium on Nuclear Power Plant Life Management, Shanghai, China, 15Management, Shanghai, China, 15--18 October 200718 October 2007

G. DG. Dííaz, R. Sainz, C. Schiersmann, P. Luna, O. Monsechaz, R. Sainz, C. Schiersmann, P. Luna, O. MonsechD. Fornero, C. MorenoD. Fornero, C. Moreno

H. SverugaH. Sveruga

NUCLEOELNUCLEOELÉÉCTRICA ARGENTINA S.ACTRICA ARGENTINA S.A..

gdiaz@na-sa.com.ar

ENPP PLiM / PLExNA-SA

OBJECTIVESOBJECTIVESTo show the current state of the ENGS PLiM / PLEx program which strongly focuses on PLEx decision / implementation.

OrganizationScheduleGeneral Methodologies

Future Challenges

Today progress / ResultsChanges implemented for PLEX

ENPP PLiM / PLExNA-SAOrganizationOrganization

PLEX PROJECT MANAGER

Phase 1 Coordinator

Aging Assessment

Safety Assessment

Digital Control Computer & IC

Retubing

GG NA-SA

Phase 2 Coordinator

Phase 3 Coordinator

ENPP OTHERS PROJECTS

ENPP PLiM / PLExNA-SA

EMBALSE REFURBISHMENT EMBALSE REFURBISHMENT -- PHASESPHASES

ENPP PLiM / PLExNA-SA

PLEX PHASE IPLEX PHASE I

Methodologies developed by AECLAECLAECLAECL, in accordance with IAEAIAEAIAEAIAEAGuidelines.

Customized to ENGSENGSENGSENGSparticularities (It includes many elements from ISR).

High participation of Plant staff and other Argentinean Institution

Own developed Procedures and Guides with the AECL / IAEAAECL / IAEAAECL / IAEAAECL / IAEAassistance.

Design Change Package+

Cost-Benefit Assessment

FASE II

Critical Systems Structures and Components Selection

COND. ASSESSLIFE ASSESS.

Other PlantPrograms

SAFETY ASSESSMENT

ENPP PLiM / PLExNA-SA

Aging Assessment Aging Assessment -- ActivitiesActivities4 Pilot Studies Finalized

Procedures Development•Life assessment procedure•Condition Assessment Proced•Document Managment, etc

Budgeting•Personnel•Support Facilities•Suppliers contracts

AECLANSALDO

Tools development•Task instructions•Data bases•DOR matrix•SCC lists•Templates, etc

Steam Generators (SGs)Feeders

SG Feed-water pumpsMHTS Feed pumps

There are also others Assess alreadyfinalized

ENPP PLiM / PLExNA-SAASSESSMENTS & RESPONSIBILITIESASSESSMENTS & RESPONSIBILITIES

ASSESSMENT TYPE (118 )

CA 99

LA 19

RESPONSABILITIES (118)

NASA; 66ANN; 31

AECL; 21

INCLUDES19 LIFE ASSESSMENT AND 99 CONDITION ASSESSMENT

RESPONSIBILITIESNASA 66 ASSESSMENTSAECL 21 ASSESSMENTSANSALDO 31 ASSESSMENTS

ENPP PLiM / PLExNA-SA

WALKDOWNSWALKDOWNS2005-2007

Planned OutagesPerformed by NA-SA

AECL (NSP)And ANSALDO (BOP)

• Nuclear & non-nuclear Piping: especial attention to the support • Civil Structures• Cables• Feeders• Expansion Joints, etc. Result

Implementation

Input to Aging Assessment

ENPP PLiM / PLExNA-SA

Databases DevelopmentDatabases Development

GPEV DATABASE

Next Life Cycle

Plant Documentation Review

Plant DBsUPDATE FINDINGS

COMPONENTS

WalkdownsSCC Lists

SCC ListsSCC ListsSCC ListsSCC Listscontain valuable information about plant components and this will imported into GPEV GPEV GPEV GPEV DATABASEDATABASEDATABASEDATABASE.

Gathered Info from closed IDs is inserted in GPEV’s DB and will be included in Plant’s DB later.

GPEV DOC

FINDINGSFINDINGSFINDINGSFINDINGS are appearing during

Plant Documentation

Review and Walkdowns.

LA & CA ReportsLA & CA ReportsLA & CA ReportsLA & CA Reportsare tracked with

DOCsDOCsDOCsDOCs DB.DB.DB.DB.Recommendations

ENPP PLiM / PLExNA-SA

Safety AssessmentsSafety Assessments (SA)(SA)The objective is to determine the areas of the installation

susceptible to improvements

These are performed in paralell with the AA

AECL is also supporting NASA in theSADuring the `07 Outage a Seismic WD

was performed with AECL specialistsfor gathering information for theseismic analysis

The application of a PSR is underdiscussion with the RegualtoryAutority

Design Changes for other CANDU are under review

ENPP PLiM / PLExNA-SARETUBINGRETUBING

A retubing pre-project contract with AECL, already finalized

ENGS has already initiated the Phase II

The result of this contract are:

Laser scanning of the areas affected in theretube operation

Conceptual design of the retube sitefacilities and waste management and wastestorage facilities

Definitions on the components suppliersRetube contract (to be signed with AECL)

Preparation of a level 2 retubing scheduleand trainingDivision of responsabilities between AECL-

NASA definition (Supply of components, Tools, Engineering and Field work)

ENPP PLiM / PLExNA-SASTEAM GENERATOR REPLACEMENTSTEAM GENERATOR REPLACEMENT

Replacement approach involves Steam Drum cutting and manipulating of old and new cartridges through the main equipment airlock.

Steam Generator Life Extension not feasible due to Tube Support Plate FAC degradation. Currently under Fitness for Service for design life achievement ENPP has already initiated the Phase II

Embalse is currently carrying out the procurement process for the new SGscartridges. SGs will be manufactured in Argentina with a License. Steam Drums will remain and are being assessed

ENPP PLiM / PLExNA-SAOTHER MODIFICATIONSOTHER MODIFICATIONS

There are some other modifications / corrective actions focused on PLEX related to the AA, in execution or that have already been performed

Condenser retubingCirculating water main pipe paintingEnhancement of the In-service Inspection Program

New Inverter

The analysis of the applicability of the design changes incorporated in other CANDU utilities are partially performed in the day-by-day operation. (WANO, COG, IAEA, AECL)

Chilled water for reactor building LAC’s

Modernization / Refurbishment of reactor building main crane and Turbine building

ENPP PLiM / PLExNA-SAFUTURE CHALLENGESFUTURE CHALLENGESTo achieve a Long Term Operation (LTO) in a safe and economical condition.

We are aware this will demand the sinergestic use of all the resurces as indicated in the figure.

To capture the experience of many people who are close to retirement and have been working from the commissioning of the plant.

To work closely with IAEA, AECL, ANSALDO, CNEA, equipment manufacturers, other plants, the regulator and any other organization related to the nuclear technology. Take advantage of the outcoming methodologies and of the richness of the experience exchange

To maximize local participation in the engineering and supply of materials and components

Other systems not relevant for the refurbishmentoutage

FeebackLong term adaptation ongoing

To develop a long term PLIM program after refurbishmentincluding

ENPP PLiM / PLExNA-SA

FORTHANKSATTENTIONYOUR