civils & buildings_part_2

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Welcome to

New Nuclear OpportunitiesUK National Supplier Day Event


Client’s Specifications for Civil Works

Frederic COPPEL – EDF/CEIDRE

Lee BROCKLEHURST - AMEC

Contents

Part 1• ETC-C and Client’s Family of Documents• Client’s General Specification• Adaptation to UK context

Part 2• Discussion of Notable Requirements

- Concrete

- Reinforcement

- Pre-stressing system



Part 1ETC-C and Client’s Family of DocumentsClient’s General SpecificationAdaptation to UK context

ETC-C and Client’s Family of Documents

ETC-C For a given domain based on standards

For a given material or equipment « with » standards

For a given material or equipement« without » standardsPart 1: Conception

Part 2: Construction

Part 3: Testing

CGS

+ CPS

BTSor

+ CPS

CST CRT

+ CPS

Safety Authorities Contracts

For safety classified buildings

Earthworks

Preliminary works

Marine works

Steelwork

Concrete pipes

Main Civil works contract

(nuclear island)

Metalwork fabrication

Access for materials

Control system for injection of construction joint seals

Turbine

Pumps

Pipes

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Client’s General Specification

FORMATION OF CGS

• First stage:

- general Civil Engineering practices, recognised design and construction rules, guidance from authoritative organisations (e.g. BRE, CIRIA)

• Second stage, based on:

- Client’s experiences of previous works (construction techniques, lessons learned from existing structures);

- specific requirements for power station structures (cooling tower, dams, intake tunnels, containment)


CONTENT

Client’s General Specification


Adaptation to UK Context

• Language translation and technical adaptation to UK practices • Four broad levels of adaptation:

1. Direct (or near) replacement of NF EN with equivalent BS EN (~80%)

e.g. replacement of NF EN 1008 « mixing water for concrete » with BS EN 1008

2. Replacement of French accreditation bodies with UK equivalent (~15%)

e.g. NF BPE (production facility for ready mix concrete) replaced by QSRMC, or AFCAB by CARES

3. French only standards (no direct equivalent in UK) (~5%)

e.g. FD P 18-011 - Definition and classification of aggressive environments for concrete mix design

covering pure water , for which there is currently no authoritative guidance in UK

4. Client’s procedures (materials tests) (~1%)

e.g. EDF procedure for concrete porosity



Part 2Discussion of Notable Requirements

- Concrete- Reinforcement- Pre-stressing system

Discussion of Notable Requirements

CONCRETE• Aggregates• Other constituents• Formulation studies and compliance criteria

REINFORCEMENT• Connections and mechanical splices

PRE-STRESSING SYSTEM• Trial tests (grouting)• Grout mixes



CONCRETE: AGGREGATES

• General requirements - Quarry file- Statistical analysis to determine consistency of the product- Specific physical and chemical properties - Tests required to demonstrate compliance during concrete formulation

• Specific requirements- For pre-stressed concrete and concrete in aggressive chemical and physical

environments

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CONCRETE: OTHER CONSTITUENTS

(additives, admixtures, binders, mixing water)

• General requirements- Compliance with recognised standards

- Tests before, during and after deliveries- Requirements for storage and use

• Specific requirements- For pre-stressed concrete GGBS is not permitted and PFA must be category A- Sulfide, chloride and sulfate content of admixtures shall be limited depending on the

application of the mix (pre-stressed concrete, grout for pre-stressed cables)



CONCRETE: FORMULATION STUDIES AND COMPLIANCE CRITERIA

• Test studies in laboratory- Determination of nominal formula and tests for sensitivity to water content, binder content, and

proportion of aggregates. Aim to simulate and check effects of possible variation during batching.

- Tests results to comply with certain conditions (e.g. fcE > 1.2 fc28 for fc28 <50 MPa )

- Tests to check compliance with specific requirements for ‘mass’ concrete:Tmax < 65°C in all cases, <80°C may be permitted in special cases depending on environment (water) and composition of concrete, with the possible use of chilled water and/or ice

- Tests to check compliance with specific requirements concrete for inner and outer containment, self compacting concrete, sprayed concrete etc.

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CONCRETE:

FORMULATION STUDIES AND COMPLIANCE CRITERIA

• Suitability tests before concreting- Test for practical implementation of concrete on the site,

- Tests results must comply with certain conditions

• Quality control tests during production

- Requirement for a monthly report

- Requirement for tests are governed by frequency, type of structure and nature of materials

- Acceptance criteria include conditions on strength, temperature, consistency
