Facility response simulation (FRS) >

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Facility Response Simulation (FRS)

FRS depicts the status of systems and equipment in user-familiar formats, including both electrical One-Line and System Flow Diagrams. Underlying logic relationships are established between equipment and its physical and design data (location, elevation, seismic design, etc.). Based on user-defined scenarios, filters are applied that depict the results/impact of the applied scenarios on the overall facility response. The graphical display identifies where

plant challenges exist, allowing for rapid assessment and decision-making to implement mitigating actions to the facility challenges.

FRS provides cross-cutting benefits to multiple organizations and programs, including – normal plant operation, live incident management, emergency planning, drill design and simulation, and training.

GLASS applications are built to fit specific customer needs. Key systems and processes within any facility must be understood, analyzed, refined, and controlled to maintain safety. With the introduction of GLASS, efficiency can be gained in maintaining facility programs.

Facility Response Simulation (FRS) graphically depicts complex logic systems and organizes them in easy to understand simplified diagrams or visual pictures. Once built, the application can be utilized by more than just engineering personnel; it becomes a valuable training tool for all facility personnel. Add-on capabilities include modules for RAD, EAL, FLEX, SSD, and F-PRA.

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FRS uses

Equipment/system status and out of service tracking: Equipment/System status is graphically displayed. In combination with the selected scenario(s), additional equipment can be removed from service to determine impacts.

Emergency planning and incident response: The scenario generation menu allows selection of single or multiple scenarios. Additional forced failures and recovery actions can be applied to equipment based on incident response. An Event Log is provided to document the incident response, and can be used for post-incident critique. Interactive Emergency Action Levels (EALs) are available to support Emergency Classification determination.

Drill design and simulation: The ability to view facility response to user-defined single scenarios, multiple scenarios, and additional forced failures provides the ideal framework for both the design and simulation of drills. Event Logging provides the necessary documentation for record keeping and post-drill critique.

Training: The electrical one-line and system flow diagrams allow for interactive use in a classroom setting. Equipment and system functions can be discussed and graphically displayed to enhance understanding of facility operation and response.

Program maintenance: Configuration control and customized reports are provided that allow for maintenance and revisions of programs such as Safe Shutdown, Fire PRA, NFPA 805, Seismic, Flooding, and FLEX.

FRS advantages

Fully customizable graphics: A standard set of symbols is available, but all can be designed to customer specifications.

Event scenario analysis: Integrated logic supports review of both known scenarios (e.g., design basis) and scenarios not previously considered (multiple, concurrent scenarios).

Quick and intuitive access to information: Information is accessed through a graphical hyperlink interface. Touch screen technology is supported so that FRS can be deployed on a portable PC/tablet or a large incident command center display.

Configuration control: All changes are regulated by the configuration control module, which assures only authorized users make changes, and all changes are automatically recorded.

Portability: Although FRS can be installed in a network environment, it does not rely on outside data connections, allowing deployment on portable devices with local data storage.

The FRS application depicts a facility 1-line electrical diagram which incorporates normal power, alternate power, control power, cross-ties, and FLEX designs which would mimic the actual distribution of power to all required pieces of equipment. Direct and indirect failures are identified and logical mitigation strategies confirm the response obtained prior to actually performing the action in the field.

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Standard Features

Graphical representation: Graphical symbols and layouts can be customized to meet user preferences.

Scenario generation menu: A scenario generation menu is provided to select the scenario(s) to be viewed. Included is the ability to overlay the effects of multiple scenarios (fires in multiple areas, fire and flood, etc.).

Forced failure and failure override: Additional flexibility is provided to show the effects of additional equipment failures in conjunction with selected scenarios. A failure override is provided for each piece of equipment to account for implementation of procedural or physical recovery actions.

Drill-down menu structure: Additional information for equipment and systems is easily accessible. Navigation between information layers is performed through interactive graphical hyperlinks.

Print ready: Facility response screens are designed to be printed in a document ready format with all appropriate revision history.

Configuration control module: User access privileges are controlled, along with formal revision control (prepare/review/approve) of controlled data.

Optional Features

Event log: The event log provides permanent documentation of Training, Drills, and Actual Events.

Equipment and System Additional Information: Direct hyperlinking is provided to additional information, including:

• Tech specs• Design information/functions• Initiation logic• Interlocks• Detailed photographs• Procedure information

Emergency classification: Interactive Emergency Action Levels (EALs) assist determination of Emergency Classification Levels.

Radiological dispersion: Radiological dispersion data is graphically displayed for both inside plant rooms and externally for offsite dose release which may be provided to various agency support teams (NRC, EPA, FEMA, etc.).

Program maintenance: Configuration control and customized reporting is available for programs such as Safe Shutdown, Fire PRA, NFPA 805, Seismic, Flooding, and FLEX.

Customizable FRS

FRS depicts safety system flow diagrams including pumps, valves, indicators, power supply dependencies, and also sub-system dependencies. Graphical logic confirms system availability given a set of known failures, such as the loss of an equipment room due to a fire scenario. Potential mitigation strategies can be seen and confirmed via the interactive graphical logic.

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FRS - Commercial nuclear

Emergency Response for nuclear facilities involves a multi-organizational response from groups that include emergency planning, engineering, operations, maintenance, rad protection, and security. Plant personnel are trained on a diverse set of accident scenarios via simulated drills. Facility Response Simulation provides customized modules to assist personnel with the ability to quickly visualize and understand current operating status, equipment unavailability, and/or failures. This allows for timelier implementation of focused mitigation strategies to resolve the incident.Available FRS modules include:

• RAD • Emergency Action Levels (EAL)• FLEX• Safe Shutdown (SSD)• Probabilistic Risk Assessment (PRA)

RAD: During an emergency plan drill/exercise which results in the postulated release of radioactive materials, RAD calculations can be integrated into FRS to provide radiation dose rates in specific locations either internal or external to the facility as a function of time. Onsite radiation dose rates can be displayed in electronic room drawings. Offsite dose rates can also be displayed on electronic site or emergency planning zone (EPZ) drawings.

Emergency Action Levels (EAL): Emergency response to accident scenarios requires timely classification of the event to offsite agencies. FRS equipment and system status provides a direct input to assist in the evaluation and classification of the event according to the emergency action level that is met.

FLEX: FLEX graphically depicts additional equipment and connections that can be aligned to existing systems to address beyond design basis scenarios (i.e. Fukushima). FLEX equipment is integrated into FRS including FLEX equipment storage locations, routings of portable hoses, and connections to existing plant electrical and piping. Under abnormal plant conditions where complex failures result in system losses beyond design, FRS provides an understanding of which FLEX options are available to mitigate an accident scenario. Use FRS-FLEX to model an existing FLEX strategy to better understand potential limitations or use FRS-FLEX to understand where additional FLEX connections may benefit a facility across multiple scenarios.

Scenarios can be chosen either individually or concurrently from a convenient scenario selection screen that is built from plant design data. Examples of design data include: equipment locations, cable routings, seismic ratings, flooding levels or room elevations, established fire area or fire compartment documentation.

Scenario selection

Fire area Fire compt Seismic Flood Enter level

FA01 FC01 0.4g FA-ALL ________

FA02 FC02 0.8g (OBE) FA01 ________

FA03 FC03 1.2g (SSE) FA02 ________

FA04 FC04 1.6g FA03 ________

FA05 FC05 1.8g FA04 ________

FA06 FC06 FA05 ________

Fire

Flooding

Seismic

Fukushima Flex

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Engineering personnel at nuclear facilities have found FRS to be useful because it retains logic and allows for a visual understanding of plant status and potential pinch points. Modules are built once and can be used daily by personnel from different departments.Safe Shutdown (SSD): With an electrical 1-line diagram and system flow diagrams already built in GLASS, equipment can now be tied to cable routings and fire areas to develop and document safe shutdown fire area strategies to meet regulatory compliance with Appendix R to 10 CFR 50, NUREG-0800, or NFPA 805. FRS-SSD can assist with identifying simplified approaches to mitigating a scenario using less recovery actions outside of the control room or alternative recovery actions that may restore more redundancy to challenged systems.

Probabilistic Risk Assessment (PRA) is prominently used at nuclear facilities to evaluate risks of core damage and large early release following specified initiating events. Current PRA tools quantify risk but do not graphically depict system or component failures. When FRS is paired with a sites’ PRA model, graphical system and component failures can be viewed to allow risk-informed decision making.PRA: FRS can be integrated with the site fire, seismic, or flooding Probabilistic Risk Assessment (PRA) model to identify the basic events representing component failures for any event scenario. The FRS PRA module organizes the basic event list by linking them up with the appropriate failures based on the equipment location and fragility, cable types, routing locations, and also models cable protection in cases of fire-rated barriers. PRA failures are graphically depicted on interactive system diagrams so Users can better understand the specific failures and strategies available to mitigate the risk.

FRS - Commercial nuclear

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Training

GLASS-FRS provides a unique visual tool to enhance Training. Interactive electrical one-line and system flow diagrams provide an ideal medium for training use in a classroom setting. Equipment and system functions can be discussed and graphically displayed. Impacts of removing equipment from service are instantly seen. Accident scenarios can be run to enhance understanding of facility operation and response to different types of accidents.

Facility response simulation use at nuclearpower plants

Engineering

• Post Fukushima response• Design change reviews• Internal events PRA• External events PRA

Safe shutdown analysis

• NFPA 805• Appendix R to 10 CFR 50• NUREG-0800

Emergency planning

• Drill development• Evaluation of mitigation alternatives• Emergency Action Levels (EAL’s)• Dose and shine assessments• Training – operations and technical staff• Operations – out of service planning• Regulatory affairs and licensing – Significance Determination

Process (SDP)

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Nigel Thornton Director, Energy

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Office: +1 704 522 7275 Cell: +1 832 247 3330 Email: nigel.thornton@atkinsglobal.com

Keith Began Manager, GLASS Business Development

Office: +1 704 731 2333

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