REGDOC-2.10.1: Nuclear Emergency Preparedness and Response: Text Equivalent

Figure 1

This diagram displays a pictorial representation of the relationships between Accident management and Emergency Preparedness.

There are 5 concentric circles, each of which represents a reactor state and level of defence in depth. The circles are represented as follows:

  • Level 1 (the innermost circle) represents Normal Operation. Operating Manuals (OMs) are used for operational response.
  • Level 2 (the 2nd circle) represents Anticipated Operating Occurrences (AOOs). Either OMs or Emergency Operating Procedures (EOPs) can be used for Operational Response
  • Level 3 (the 3rd circle) represents Design Basis Accidents. EOPs are used for operational response. Onsite Emergency Response (ER) may be called upon starting at this response level.
  • Levels 4 and 5 (the 4th and 5th circles) represent Beyond Design Basis Accidents (BDBAs), including Severe Accidents. Transition from EOPs to Severe Accident Management Guidelines (SAMGs) is used for operational response. Offsite ER response may be used in this level in addition to Onsite ER response.

This diagram also contains 2 squares that list physical and Procedural barriers to fission product release.

Physical barriers to fission product release include:

  • fuel matrix
  • fuel sheath or cladding
  • reactor coolant pressure boundary
  • containment
  • exclusion zone

Procedural barriers include:

  • operation manuals (OMs)
  • emergency operating procedures (EOPs)
  • severe accident management guidelines (SAMGs)

Additionally, this diagram also includes a summary of the purpose of an Integrated Accident Management Program (REGDOC-2.3.2) and a summary of an Emergency Preparedness Program (REGDOC-2.10.1). Arrows go back and forth between both programs to represent the fact that they complement, support and interact with each other.

Integrated accident management program REGDOC-2.3.2 is used to:

  • prevent escalation of an accident
  • terminate accident progression
  • maintain fission product barriers
  • minimize radioactive releases
  • achieve a long-term safe stable state

Emergency preparedness program REGDOC-2.10.1 is used to:

  • plan response actions
  • maintain level of readiness to respond
  • respond to protect workers, the public and environment
  • respond to support accident management
  • keep offsite authorities informed
  • plan and undertake recovery efforts
  • test the implementation measures

Return to Figure 1

Figure 2

This diagram consists of a grid that is roughly aligned by plant state. For each Plant State, the Objective, Strategy, Level of Defence in Depth, Objective, Means of Control, Analysis, Procedures and Response options are listed.

For the plant state of Normal Operation:

  • the Objective is Prevention of deviation from normal
  • the Strategy is prevention
  • the Defence in depth is Level 1
  • the Means of control are Process systems
  • the Analysis is Design analyses
  • the Procedures are Operation manuals
  • the Response includes Normal operating systems, Human and organizational performance, and Main Control room or secondary control room

For the plant state of Anticipated operational occurrences:

  • the Objective is Control of abnormal operation
  • the Strategy is Prevention
  • the Defence in depth is Level 2
  • the Means of control include Process systems, and Control & protection systems
  • the Analysis is Deterministic safety analyses
  • the Procedures include Operation manuals and Emergency operating procedures
  • the Response includes Normal operating systems, Human and organizational performance, and Main Control room or secondary control room
  • may utilize an Integrated Accident Management Program

For the plant state of Design basis accidents:

  • the Objective is Control of accidents within design limits
  • the Strategy is Prevention and Mitigation
  • the Defence in depth is Level 3
  • the Means of control include Process systems, Control & protection systems, and Engineered safety systems & operator actions
  • the Analysis includes Deterministic safety analyses and Probabilistic analyses
  • the Procedures include Emergency operating procedures, and Emergency response plans & procedures
  • the Response includes Human and organizational performance, Main Control room or secondary control room, Onsite emergency response actions, onsite technical support / onsite emergency support, and Engineered safety features
  • utilizes the Integrated Accident Management Program and the Emergency Preparedness Program

For the plant state of Beyond design basis accidents - no or limited core damage:

  • the Objective is Control of core damage to avoid severe accident
  • the Strategy is Prevention and Mitigation
  • the Defence in depth is Level 4
  • the Means of control include Process systems, Control & protection systems, Engineered safety systems & operator actions, and Complementary design features
  • the Analysis includes Deterministic safety analyses and Probabilistic analyses
  • the Procedures include Emergency operating procedures, and Emergency response plans & procedures
  • the Response includes Human and organizational performance, Main Control room or secondary control room, Onsite emergency reponse actions, onsite technical support / onsite emergency support, Offsite emergency support, Engineered safety features, and Containment & design feature
  • utilizes the Integrated Accident Management Program and the Emergency Preparedness Program

For the plant state of Beyond design basis accidents - severe accidents:

  • the Objective is Mitigation to confine radioactive materials
  • the Strategy is Mitigation
  • the Defence in depth is Level 4 or Level 5
  • the Means of control includes Process systems, Control & protection systems, Engineered safety systems & operator actions, and Complementary design features
  • the Analysis includes Deterministic safety analyses and Probabilistic analyses
  • the Procedures are Severe accident management guidelines
  • the Response includes Human and organizational performance, Main Control room or secondary control room, Onsite emergency response actions, onsite technical support / onsite emergency support, Containment & design features, Offsite emergency support, and Offsite emergency response actions
  • utilizes the Integrated Accident Management Program and the Emergency Preparedness Program

For the plant state of Post accident:

  • the Objective is Mitigation of radiological consequences
  • the Strategy is Mitigation
  • the Defence in depth is Level 4 or Level 5
  • the Means of control is Offsite monitoring & protection
  • the Analysis includes Probabilistic analyses
  • the Procedures are Severe accident management guidelines
  • the Response includes Human and organizational performance, Main Control room or secondary control room, Onsite emergency response actions, Onsite technical support / onsite emergency support, Offsite emergency support, and Offsite emergency response actions
  • utilizes the Integrated Accident Management Program and the Emergency Preparedness Program

Return to Figure 2

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