Safety Definitions Quiz

Questions and Answers

What does RMTS stand for in the context of risk management?

Risk Management Technical Solutions

Risk Managed Technical Specifications (correct)

Risk Management Technology Systems

Risk Managed Technical Strategies

What is the primary purpose of the Risk Management Action Time (RMAT)?

To define the time when maintenance is due

To evaluate the operational efficiency of the plant

To identify when risk management actions are necessary (correct)

To set the schedule for equipment upgrades

Which of the following is NOT considered an RMA candidate?

External environmental conditions (correct)

Out of service PRA modeled equipment

Fire Zone

In-service PRA modeled equipment

What characterizes Zero-Maintenance Risk?

It refers to the risk of operational failure when all SSCs are functional. Signup and view all the answers

Which statement best describes the relationship between RMTS and RICT?

RMTS is synonymous with RICT but includes a wider scope. Signup and view all the answers

What does the BACK STOP signify in relation to a RICT?

An administrative maximum completion time regardless of calculated RICT Signup and view all the answers

Which of the following accurately describes a Degraded Barrier?

A barrier found to be impaired and requires immediate repair or reconfiguration Signup and view all the answers

What is the primary function of the CONFIGURATION RISK MANAGEMENT PROGRAM (CRMP) software?

To assess the impact of equipment configurations on plant safety Signup and view all the answers

How is the CORE DAMAGE FREQUENCY (CDF) calculated?

Using the CRMP Tool or methods based on SSC status modeled in the PRA Signup and view all the answers

What characterizes an EMERGENT RICT?

A reactive use in response to unpredicted equipment conditions or failures Signup and view all the answers

What is a FRONT STOP in relation to a LCO Required Action?

The prescriptive completion time as defined by Technical specifications Signup and view all the answers

Which statement correctly explains CRMP INTERFACES?

They are communication tools between scheduling software and clearance software Signup and view all the answers

What is the significance of an environmental change in risk management?

It is a condition that augments the risk of an initiating event Signup and view all the answers

What is the primary function of A4 Functional SSCs in the context of PRA?

They assist in online configuration risk assessments. Signup and view all the answers

What does ICDP measure in a nuclear plant risk assessment?

The difference in core damage probabilities over a given period. Signup and view all the answers

What is the role of Operational Risk Awareness (ORA)?

To categorize and mitigate risks tied to work activities. Signup and view all the answers

What does the Risk Informed Completion Time (RICT) indicate?

The allowed time until risk thresholds are reached or a maximum duration. Signup and view all the answers

Which statement correctly describes the Large Early Release Frequency (LERF)?

It estimates the likelihood of significant accidental releases of radioactive materials. Signup and view all the answers

What determines the operational status of PRA Functional SSCs?

Their evaluation and documentation process. Signup and view all the answers

What is a feature of Fire RMAs in risk management?

They reduce the chance of fires triggering an initiating event. Signup and view all the answers

What is the Incremental Large Early Release Probability (ILERP)?

The difference in large early release probabilities over time. Signup and view all the answers

What is the primary purpose of the Plan of the Day (POD)?

To describe current and upcoming work activities. Signup and view all the answers

What does a RICT Program specifically entail?

A plant-specific set of technical specifications and program requirements. Signup and view all the answers

What is an expected consequence of a Loss of Safety Function?

Inability to perform critical safety functions during an event. Signup and view all the answers

Which option best describes the term Instantaneous Risk?

Risk values reflecting a snapshot in time without duration consideration. Signup and view all the answers

In terms of Risk Management Actions, what does Level 1 emphasize?

Awareness, control, and planning rigor for activities. Signup and view all the answers

What does the Risk Factor represent in risk calculations?

An increase in both CDF and LERF probabilities. Signup and view all the answers

Study Notes

Definitions Overview

Back Stop: The maximum time allowed to complete actions regardless of RICT. It's set at 24 hours for safety function loss and 30 days for other conditions.
Barrier: Physical components that protect a system from initiating events, not specified in Technical Specifications.
Configuration Risk Management Program (CRMP) Software: Tool for assessing the impact of equipment configurations on plant safety during maintenance activities.

Core Damage and Risk Metrics

Core Damage Frequency (CDF): Predicts the likelihood of accidents causing core damage in one reactor year, calculated using CRMP or PRA methods.
Degraded Barrier: A barrier that needs repair or adjustment for maintenance.
Incremental Core Damage Probability (ICDP): The risk change attributable to out-of-service SSCs or certain conditions, reflecting a specific plant configuration impact.

Operational Risk and Management

Opportunities for Risk Management Actions (RMA): Measures aimed at reducing risks associated with maintenance and functioning of plant equipment.
Risk Informed Completion Time (RICT): Time frame for addressing conditions needing entry into Technical Specifications, capped by 1E-5 ICDP or 30 days.
Planned RICT: RICT used for pre-planned maintenance tasks, distinguishing itself from emergent conditions.

Risk Definitions

Instantaneous Risk: The expected core damage or large early release frequency at a specific timeframe without duration consideration.
Probabilistic Risk Assessment (PRA): A quantitative risk evaluation associated with plant operations.
Zero-Maintenance Risk: The baseline risk level assessed when all relevant components are in service without special conditions.

Work Management and Constraints

Plan of the Day (POD): A document that outlines current and impending work, especially regarding maintenance systems.
Front Stop: Prescriptive period for completing a Required Action outlined by Technical Specifications (e.g., 72 hours).

Risk Management Approaches

Non-Fire RMA Levels: Actions to minimize initiating events, categorized into three levels based on impact on risk awareness and control.
Common Cause RMAs: Focuses on the resilience of redundant systems in the event of a failure.
Risk Managed Technical Specifications (RMTS): Enhancements in Technical Specifications derived from probabilistic assessments.

Risk Assessment Timing

Event Start Date: Marks when the first LCO exceeds its front stop.
Risk Management Action Time (RMAT): The point at which risk action thresholds are activated, requiring intervention.

Software and Interfaces

CRMP Interfaces: Software connections for integrating work scheduling and clearance processes, ensuring seamless communication of plant configurations.

Other Important Concepts

Environmental Change: External conditions significantly increasing risk, such as severe weather.
Emergent RICT: A reactive RICT triggered by unanticipated equipment failures requiring immediate entry into LCO.

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Description

Test your knowledge on key safety definitions, including terms such as BACK STOP and BARRIER. This quiz is essential for understanding safety protocols and risk management in various environments. Assess your comprehension of these critical concepts in safety management.