Wp4 plant operation instrumentation control and protection system design
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WP4 PLANT OPERATION, INSTRUMENTATION, CONTROL AND PROTECTION SYSTEM DESIGN. LEADER. F. Rivero May 9th 2013, Genoa. Deliverables. M08 → Conceptual definition of the control and protection functions and its architecture → M34 → January 2013. 2010. 2011. 2012. Schedule. 2013.

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Wp4 plant operation instrumentation control and protection system design

WP4PLANT OPERATION, INSTRUMENTATION, CONTROL AND PROTECTION SYSTEM DESIGN

LEADER

F. Rivero

May 9th 2013, Genoa


Deliverables
Deliverables

M08→ Conceptual definition of the control and protection functions and its architecture →M34 → January 2013


Schedule

2010

2011

2012

Schedule

2013

  • Task 4-2 → DEL06 “State of the art Instrumentation and Control Survey”

  • Task 4-1 → DEL14 “Normal, transient and accidental operational modes: control and protection functions identification”

  • Task 4-3 → DEL20 “Instrumentation Specifications”

  • Task 4-4 → DEL21 “Preliminary definition of the control architecture”


Wp4 work program
WP4 Work Program

  • Deliverables

  • Tasks responsible

  • Schedule

  • Documents indexes

  • Chapters responsible

  • Chapters participants

  • Input data


Task 4 1 normal transient and accidental operational modes functions identification
Task 4-1: Normal, transient and accidental operational modes: functions identification

D14 Normal, transient and accidental operational modes: control and protection functions identification

Revision 1 / Final (October 2012)

Objectives

Definition of the operational modes and parameters or functions to be controlled

Schedule: November 2012

Activities

Plant operation procedures involving both primary and secondary systems

Perform the conceptual design of the plant control and protection systems

CIRTEN, EA, SCKCEN

5


Identification of functions for plant control and protection
Identification of functions for plant control and protection modes: functions identification

  • Protection functions:

    • Basically: automatic and manual initiation of reactor trip (RT) and engineered safety features (ESFs)

  • Post-accident functions:

    • Basically: automatic and manual control of the ESFs necessary to reach a safe shutdown state during the first 24 h from the beginning of the event

  • Control and limitation functions

    • Control of lead temperature at core outlet by means of CRs

    • Limitation of reactor power

    • Control of lead temperature at SG outlet

    • Control of feedwater temperature

    • Control of oxygen concentration in the coolant

    • Control of turbine speed

  • Other I&C funtions

    • Severe accident functions: Severe accident monitoring

    • Risk reduction functions: Mitigation of ATWS and software common cause failures by means of a diverse actuation of reactor trip

    • Management of priority and actuation control functions: Management of priority of actuator commands, Monitoring and protection of the actuators, Interlocks, Etc.

    • HMI functions: Alarm display and processing functions, Data archiving and processing functions

6


Basic structure of i c architecture
Basic structure of I&C architecture modes: functions identification

  • For each function

    • Safety classification according to EUR

    • Identification of plant parameters to be measured

    • Define interventions of the I&C systems to counteract

  • Definition of a digital I&C architecture organized on 4 levels

    • Level 0: Process Interface Level (Sensors and actuators)

    • Level 1: System Automation Level (Closed loop and open loop controls)

    • Level 2: Unit Supervision and Control Level (Data processing for HMI)

    • Level 3: Site Management Level (no direct influence on plant behaviour)

7


Basic structure of i c architecture1
Basic structure of I&C architecture modes: functions identification

8


Task 4 2 state of the art i c survey
Task 4-2: State of the art I&C survey modes: functions identification

  • D06 State of the art I&C Survey

  • Revision 1 (December 2012)

  • Objectives

    • Evaluate the applicability of available I&C equipment to the LFR operational needs

    • Identify future R&D needs in the field of I&C

  • Activities

    • Collect information in relation with the lead technology

    • Identify needs (instruments and control devices)

    • Contact companies

  • EA, SCKCEN


Core monitoring instrumentation survey
Core monitoring instrumentation survey modes: functions identification

  • Main parameter related to core: neutron flux (+ change rate)

    • Low-level neutron flux monitoring during critical approach and start-up phase

    • Fast neutron flux change measurement (anywhere) for trip signal in case of sudden reactivity increase

    • In-core neutron detection at various positions for neutron flux mapping (radially – axially)

  • Fission chambers. Temperature

    • mostly specified up to 250°C, 300°C, 350°

    • models exist up to 500-600°C (e.g. Photonis CFUE22-32-42-43, CFUC06-07, used in PHENIX, SPX)

  • Self-powered neutron detectors

    • Typically applied for thermal neutron detection

    • Thermocoax, KWD Nuclear Instrum. AB, Mirion Technol. – IST,…

10


Primary coolant instrumentation survey
Primary coolant instrumentation survey modes: functions identification

  • Temperature

    • Thermocouple protected with a thermowell resistant to corrosion

    • Similar experiences in metallurgic sector or molten aluminum

      • Thermo-Couple Products Co. (Marsh Bellofram Group)

      • Pyrosales Pty Ltd

      • Termo Kinectics

  • Level

    • Radar to avoid physical contact with lead

    • Support high temperature

    • Emerson / Aplein Ingenieros. Model: TankRadar Pro Steel

      • Metallurgical applications and molten salts

      • Used to measure level in molten salts

      • Temperature at antenna: up to 1000 ºC

    • Vega, Model: Vegapuls 68,

    • Endress Hauser. Model: FMR230 M

    • MBA instruments. Model: MBA400

11


Primary coolant instrumentation survey1
Primary coolant instrumentation survey modes: functions identification

  • Pressure

    • Capacitive transmitter with a seal

    • Used in hot temperature or highly corrosive processes

    • Temperature limitation due to fill fluid

    • Fill fluid: Sodium-potassium alloy (NaK), high temperature up to 700 - 800 ºC

    • Creative Engineers Inc, MTI Instruments

  • Flow

    • Elbow flow meter in pumps output

    • Differential pressure transmitter connected to the elbow with a diaphragm seal filled with Sodium-potassium alloy (NaK)

    • Creative Engineers Inc, MTI Instruments

  • Oxygen Analyzers

    • Electrochemical cells of YSZ (Yttria Stabilized Zirconia)

    • Excellent oxidation/corrosion resistance

    • High temperature

    • No COTS available

12


Task 4 3 instrumentation specification
Task 4-3: Instrumentation Specification modes: functions identification

  • D20 - Instrumentation specifications

  • Revisio 0 (December 2012)

  • Objectives

    • Instrument Specifications

  • Activities

    • Prepare the design specification of the instruments and control devices

  • Schedule: January 2013

  • EA, ENEA, INR, SCKCEN


Core and primary coolant instrumentation
Core and Primary coolant instrumentation modes: functions identification

Fuel Assembly

Safety Rods

Control Rods

Dumy Element

In-core Detector (3 elevations)

Close-to-core Detector (top to bottom)

  • Ex-core / In-core neutron flux detector configuration

  • Technical and design requirements for Primary coolant instrumentation

    • Temperature

    • Pressure

    • Level

    • Flow

    • Oxygen concentration

    • Steam concentration in cover gas

  • Qualification requirements following IEC 60780

14


Secondary coolant pressure
Secondary Coolant. Pressure modes: functions identification

Steam generator

output (1, 2...8)

HPT input

LPT input

By-pass valve

input

Condensate

pumps output (1 & 2)

Steam generator

input (1, 2…8)

Deareator

Feedwater pumps output (1 & 2)

15


Secondary coolant temperature
Secondary Coolant. Temperature modes: functions identification

Steam generator

output (1, 2...8)

Auxiliary

heater input

By-pass valve

output

Main steam line

Steam generator

input (1, 2…8)

Feedwater line

Deareator input bypass line

16


Secondary coolant flow
Secondary Coolant. Flow modes: functions identification

Attemperation

valve input

Feedwater line

17


Secondary coolant level
Secondary Coolant. Level modes: functions identification

Deareator

Condenser

Preheaters (1, 2. . .6)

FWTC Heater

18


Radiation monitoring
Radiation Monitoring modes: functions identification

Containment air

Main Control Room intake air

  • Fuel Intermediate Storage

  • Equipment Hot Cell

  • Spent Fuel Hot Cell

  • Spent Fuel Storage Building

Plant vent exhaust

  • Area Radiation Monitoring

Process Radiation Monitoring


Task 4 4 preliminary definition of the control architecture
Task 4-4: Preliminary definition modes: functions identificationof the Control Architecture

  • D21 - Preliminary definition of the Control Architecture (Milestone M08)

  • Revision 0 (January 2013)

  • Objectives

    • Define the conceptual European Lead Cooled Fast Reactor control and operation philosophy to maintain the reactor in operable and safe conditions

  • Activities

    • Define the control architecture to perform

  • Schedule: January 2013

  • ANSALDO, CIRTEN, EA, INR, SCKCEN


Plant model
Plant model modes: functions identification


Full power control scheme
Full power control scheme modes: functions identification



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