current status and plans for npp long term … status and plans for npp long term operation in spain...

Current Status and Plans for NPP Long Term Operation in Spain

Lorenzo Francia Nuclear Directorate UNESA - Spanish Utilities Association

IAEA Technical Working Group on Life Management of Nuclear Power Plants (TWG-LMNPP) Vienna, February 25-27, 2015

IAEA TWG-LMNPP, Vienna Feb-15 -2-

Electrical Capacity & Generation in Spain 2014 (provisional data)

Electrical Installed Capacity (102 GW)

Electricity Generation (267 TWh)


Spanish Nuclear Power Plants / Facilities

Almaraz

Unit 1: 1049 MW

Unit 2: 1045 MW

S.M. Garoña

466 MW

Cofrentes

1092 MW

Vandellós II

1087 MW

Trillo 1066 MW

Ascó

Unit 1: 1033 MW

Unit 2: 1027 MW

Vandellós I

Decommisioned

José Cabrera (Zorita)

In decommisioning

El Cabril

LLW Storage Facility

Juzbado

Fuel Manufacturing

Facility


Operating Spanish Nuclear Power Plants

Plant / Unit Initial Rating [MWe]

Current Capacity

[MWe]

Reactor Type

Connection to grid

Sta. Mª GAROÑA 460 466 BWR-GE 1971

ALMARAZ 1

930 1,049 PWR-W 1981

ALMARAZ 2

930 1,045 PWR-W 1983

ASCÓ 1

930 1,033 PWR-W 1983

ASCÓ 2

930 1,027 PWR-W 1985

COFRENTES

975 1,092 BWR-GE 1984

VANDELLÓS II

982 1,087 PWR-W 1987

TRILLO

1,041 1,066 PWR-KWU 1988

Total 7.865


A Simplified Diagram Of The Spanish Authorization Process


Licensing & Regulatory Aspects

No legal lifetime limit for the Spanish NPPs.

For each plant, an Operating License is required and includes the due date for its renewal.

Application for a renewal (every 10 years) of the plant Operating License:

• Periodic Safety Review (PSR) to be performed and submitted: − CSN Safety Guide (SG) 1.10 “Periodic Safety Reviews of NPPs”. Rev. 1,

Sep. 2008.

− The PSR includes a summary of ageing management activities carried out in the previous 10 years term, as well as provisions for the next 10 years term.

• Applicability Analysis of New Regulations and Standards: − CSN Technical Instruction (TI). Nov. 2006. Regulation/standard published

by international organizations or by the technology origin country whose accomplishment must be analyzed by the plant/utility.


PSRs and Renewal of Operating Licenses (< 40 years)


Operating Licenses for Long Term Operation (LTO)

In addition to the PSR and the Regulation/Standard Applicability, specific requirements for an Operating License Renewal related to LTO (beyond 40 year design life):

• Integrated Ageing Management & Evaluation Programme (PIEGE).

• Updating of the Radiation Impact Study and the Radioactive Waste Management Plan.

• Safety Analysis Report Supplement.

• Revision of Technical Specifications.


Renewal of Operating Licenses for Long Term Operation (LTO)


Regulatory Requirements for Ageing Management and LTO

Ageing Management and LTO are regulated in Spain by: • CSN Safety Guide 1.10 (Periodic Safety

Reviews of NPPs). Rev. 1, September 2008.

• CSN Safety Instruction IS-22 (Safety Requirements for Aging Management and LTO of NPPs). Rev. 0, July 2009.

PLiM/Ageing Management and Long-Term Operation programmes have been based on the USNRC methodology for License Renewal (10CFR50.54 / LR Rule) and also meet the main guidelines laid down in the IAEA ageing management documents.


Conclusion. The Spanish Nuclear Regulatory Authority (CSN) requires:

For the design operating term (40 years):

• Each NPP shall implement a Plant Life Management (PLiM) Programme according to IS-22 requirements:

– Development of a methodology for the Scope & Screening of SSC. – Development of a process for the AMR. – Development of Ageing Management Programmes (AMP) to address the

mechanism identified previously and verify the effectiveness of those activities.

• Each NPP shall yearly issue an Ageing Management Report including any change on PLiM programme and a summary of ageing management activities carried out during the year.

In order to apply for the plant Long Term Operation (LTO) (> 40 years):

• Each applicant shall prepare an Integrated Ageing Assessment & Management Plan (PIEGE) according to IS-22/10CFR54 requirements.

• For LTO (> 40 years) a PLiM Programme for LTO based on PIEGE results shall be implemented (development of the AMPs and resolution of the TLAAs).

• The annual, updated Ageing Management Report is also required beyond 40 years.

Regulatory Requirements for Ageing Management and LTO


LTO – Ageing Evaluation and Management (PIEGE)

SCOPE

Identify SSCs in the

Scope and their

Intended Functions

SCREENING

Identify SSCs Subject to

Ageing Management

Review

AMP

Demonstrate that the Effects of Aging are

Managed

Prepare the LTO

Application for

Submittal to CSN

Identify Technical

Specification

Changes

Prepare the Safety

Analysis Report

Supplement

TLAA

Identify and Evaluate the Time

Limited Ageing Analyses

PSR

New

Regulation

Analysis


Long Term Operation (LTO) in Spain


Operating Spanish Nuclear Power Plants

Plant / Unit Initial Rating [MWe]

Current Capacity

[MWe]

Reactor Type

Connection to grid

Operating License Validity

up to

Sta. Mª GAROÑA 460 466 BWR-GE 1971 July-2013 >> ??

ALMARAZ 1

930 1,049 PWR-W 1981 June-2020

ALMARAZ 2

930 1,045 PWR-W 1983

ASCÓ 1

930 1,033 PWR-W 1983 October-2021

ASCÓ 2

930 1,027 PWR-W 1985

COFRENTES

975 1,092 BWR-GE 1984 March-2021

VANDELLÓS II

982 1,087 PWR-W 1987 July-2020

TRILLO

1,041 1,066 PWR-KWU 1988 November-2024

Total 7.865


Lifecycle Management Plan Implementation process

NO

YES

Information Sources

SSCs Listing

SSCs Functions

Maintenance Rule (MR)

•Safety Related or

•Non Safety Related affecting Safety or

•Compliance with specific Regulations

Operating Experience

Report

Define Enhancements/New programs

Aging Effects/Mechanisms are adequately Managed

Environment TLAA Evaluation

•Passive and Long-Live

Material

Ageing Effects & Mechanisms Resolved by AMP Validated for LTO Reanalysis for LTO

Scope & Screening

Ageing Effects and Mechanisms Evaluation

FSAR

Design Basis Documents

Environmental Qualification

Plant Configuration Management

Plant design modifications

Time Limited Ageing Analyses (TLAA)

Ageing Management

Programmes (AMP)

Suitable GALL AMP

exist?


Example of AMPs from a PWR


Example of AMPs from a PWR (cont)


Example of TLAA from a BWR plant


Example of TLAA from a BWR plant (cont)


Lifecycle Management Organization

The AMPs organization and development are supported on:

The AMP owners

AMP owner is the Plant section (*) that performs the main AMP activities and prepare the periodic AMP report.

The AMP collaborators

AMP collaborator is the Plant section that also performs AMP activities and assists the AMP owner in preparing the AMP report.

The PLiM section

PLIM section is the Plant group that manages PLiM programme and coordinates the AMPs reports .

(*) Plant personnel from Mechanical Maintenance, In-Service Inspection, Chemistry, Civil, Elecrical Maintenance, Operation, etc.


Plant Organizational Units

Civil

Main

tenan

ce

En

gin

eering

PL

IM

Mech

an

ical

Main

ten

an

ce

Electrical

Main

tenan

ce

I&C

Main

tenan

ce

Ch

emistry

In-S

ervice

Insp

ection

Op

eration

Fire P

rotectio

n

AMP 01

AMP 02

AMP 03

AMP 04

AMP 05

AMP …..

AMP ……

AMP …….

AMP ……

AMP …….

AMP …….

O : AMP Owner C : AMP Collaborator C&S : Coordination and Support

O

O

O

O

O

O

O

O

O

O

C

C

C

C

C

C

C

C

C

O C

C

C

C

C&S

C&S

C&S

C&S

C&S

C&S

C&S

C&S

C&S

C&S

C&S

C C


Examples of committments from LR/LTO application (S.M. Garoña plant)

New Standby Gas Treatment System. Resulting from application of RG 1.52 “Design, Inspection and Testing Criteria for Air Filtration and Adsorption Units of Post-Accident Engineered-Safety-Feature Atmosphere Cleanup Systems in LWRs”, Rev.3.

ASME AG-1 for mechanical equipment, seismic qualification and separation.

New routing for power and I&C cables. Resulting from application of RG 1.75 Rev.2 (1978) and Rev.3 (2005) “Physical independence of electrical systems” (IEEE-384-1992).

Minimum separation distance requisites and electrical cables ducts and redundant divisions equipment isolation.


New Standby Gas Treatment (SBGT)

Turbine building

Reactor Building

HVAC

building

Offices

Control

Room

Location of new SBGT

New building


New Standby Gas Treatment (SBGT)

New SBGT scheme

New Filtration Unit


New Cables Rounting.- Current Cable Trays


New Cables Routing.- Current Cable Tray System in Cable Room

Control Room View Cable Room View


New trays above Control Room

New Cables Routing.- New Cable Tray System

New routing between Control Room and Reactor Building

(Train A)

Routing of 1,543 new cables, aprox. 108 km


Examples of initiatives related to LTO

Reactor Internals Research Project (ZIRP)

Concrete Aging Programme

Cable Aging Programme


Jose Cabrera Nuclear Power Plant

Location: Almonacid de Zorita, Guadalajara, Spain

Zorita

Spain Zorita

JOSE CABRERA (ZORITA) plant

Operation - 1968/2006

Single Loop W PWR, 160 MWe

Utility: Union Fenosa (now Gas Natural Fenosa, GNF)

Status : Under decommissioning (by ENRESA)

IAEA TWG-LMNPP, Vienna Feb-15 -30- 30

ZIRP - Zorita Internals Research Project

Current Participants:

• EPRI - MRP • U.S. NRC Research • CSN (Spanish regulator) • SSM (Swedish regulator) • Tractebel (Belgium) • AXPO (Switzerland) • Additional in-kind contribution

from Japanese utilities/MHI

Objective: Characterize the effects of neutron irradiation on the mechanical and microscopic properties of stainless steel materials irradiated under service conditions to increase the understanding of fluence effects at end of service life (40, 60 years and beyond)


Project on Jose Cabrera “Zorita” Concrete

Objective: Develop experimental tests and theoretical studies related to the aging and degradation of concrete in the particular service conditions (temperature, radiation and chemicals) of nuclear plants in operation, relevant for the plant LTO and other potential nuclear applications (SF containers, SF storage facilities,…).

120

CORE

Specimens

BIOLOGIC SHIELDING

Current Participants:

Enresa CSN Endesa Gas Natural Fenosa Iberdrola IETcc


Monitoring and Evaluation of Electric Cables

Accomplish aging studies for Medium and Low voltage cables determining the condition of the insulation materials and applying advanced tests and diagnostics of cables.

Representative samples of NPP cables, subject to quantified natural aging using the best knowledge of operating history (location, loadings, working hours, temperature, irradiation,….).

Goal is to obtain the following:

• Quantification of uncertainty factors

in the process.

• Updating Cable Aging Models


Monitoring and Evaluation of Electric Cables

Project

First stage:

• Identify types of cables and collect operating history.

• Create a database to improve management.

Second stage:

• Representative cables selection to characterize and use them on third stage

Third stage:

• Accelerating cables ageing and testing in order to know them condition.


Economical Environment

Electricity system annual deficit (incomes not matched to expenses) gives rise to an accumulated debt of the system (29,000 M€ (end 2013)).

Several measures have been recently taken by the Government with the aim to eliminate that deficit. Among them, new taxes on electricity production (in general) and on specific technologies (in particular, on nuclear) have been introduced.

New nuclear regional taxes have been imposed.

Potential revision of fees for the fuel cycle back-end fund.

Attractiveness and interest in the NPP Long Term Operation.

CHALLENGE: To keep NPP operation cost-effective.