Technical Specification Introduction Flashcards
Where do the Technical Specifications come from?
The USAR chapter 16
What are the five major chapters contained within the Technical Specifications?
- Use and Application
- Safety Limits
- Specifications
- Design Features
- Administrative Controls
What is the definition of SAFETY LIMITS?
SAFETY LIMITS for nuclear reactors are limits upon important process variables which are found to be necessary to reasonably protect the integrity of certain physical barriers which guard against the uncontrolled release of radioactivity.
What is the definition of Limiting Conditions for Operation?
Limiting Conditions for Operation are the lowest functional capability or performance levels of equipment required for safe operation of the plant.
What are Surveillance Requirements?
Surveillance Requirements are requirements relating to test, calibration, or inspection to assure that the necessary quality of systems and components is maintained, that facility operation will be within the Safety Limits, and that the LCOs will be met.
What is an Active LCO?
A situation in which the requirements of the LCO are not met for the present mode or condition. The Action statement is entered and the Tech Spec Actions are performed within the specified Completion Time.
What is a Potential LCO?
A situation in which the requirements of the LCO statement are not met; however, the plant is not in the mode or condition applicable to that LCO statement. The Action statement is not entered. A Potential LCO could become and Active LCO after a mode change or a could even prevent a planned mode or condition change.
What is indicated by a term in the Technical Specifications that appears in capitalized type?
That term is in the Definitions section of Tech Specs.
What is the definition of ACTIONS?
ACTIONS shall be that part of a Specification that prescribes Required Actions to be taken under designated Conditions within Specified Completion Times.
What is the definition of MODE?
A MODE shall correspond to any one inclusive combination of mode switch position, average reactor coolant temperature, and reactor vessel head closure bolt tensioning specified in Table 1.1-1 with fuel in the reactor vessel.
What is the definition of OPERABLE-OPERABILITY?
A system, subsystem, division, component, or device shall be OPERABLE or have OPERABILITY when it is capable of performing it’s specified safety function(s) and when all necessary attendant instrumentation, controls, normal or emergency electrical power, cooling and seal water, lubrication, and other auxiliary equipment that are required for the system, subsystem, division, component, or device to perform it’s specified safety function(s) are also capable of performing their related safety function(s).
What are the MODE 1 requirements per Table 1.1-1?
MODE 1:
- Title - Power Operation
- Reactor Mode Switch Position - Run
- Average Reactor Coolant Temperature - N/A
What are the MODE 2 requirements per Table 1.1-1?
MODE 2:
- Title - Startup
- Reactor Mode Switch Position - Refuel* or Startup/Hot Standby
- Average Reactor Coolant Temperature - N/A
- All reactor vessel head bolts are fully tensioned.
What are the MODE 3 requirements per table 1.1-1?
MODE 3:
- Title - Hot Shutdown*
- Reactor Mode Switch Position - Shutdown
- Average Reactor Coolant Temperature - Greater than 200F
- All reactor vessel head closure bolts are fully tensioned.
What are the MODE 4 requirements per Table 1.1-1?
MODE 4:
- Title - Cold Shutdown*
- Reactor Mode Switch Position - Shutdown
- Average Reactor Coolant Temperature - Less than or equal to 200F
- All reactor vessel head closure bolts are fully tensioned.
What are the MODE 5 requirements per table 1.1-1?
MODE 5:
- Title - Refuel*
- Reactor Mode Switch Position - Shutdown or Refuel
- Average Reactor Coolant Temperature - N/A
*One or more reactor vessel head closure bolts less than fully tensioned.
What is the purpose of the Logical Connectors, and what two are used?
The purpose of the Logical Connectors is to discriminate between, yet connect, items in the ACTIONS and Surveillance Requirements.
The only two Logical Connectors used are:
1. AND(underlined)
2. OR(underlined)
When does the Completion Time begin?
Completion time begins when the SRO has determined that the LCO is not met(discovery of a situation) and an ACTIONS Condition is entered, unless otherwise specified.
When can an ACTIONS Condition be exited?
- When the condition no longer exists
- When the LCO is no longer applicable.
How are multiple occurrences of inoperability handled for the same Condition?
Once a Condition has been entered subsequent divisions, subsystems, etc, discovered inoperable will NOT result in separate entry into the same condition unless you have the NOTE!!
What are the requirements to extend the completion time of a given Required Action when subsequent inoperability occurs?
- The subsequent inoperability must exist concurrent with he first inoperability.
AND - The subsequent inoperability must remain inoperable after the first one is resolved.
What is total time allowed for completion of Required Actions in accordance with the Completion Time extension?
The total Completion Time allowed for completing the Required Actions is the more restrictive of:
- The total Completion Time as measured from the initial entry of that Condition plus an additional 24 hours,
OR
- The stated Completion Time as measured from the subsequent inoperability.
When is the Required Action Completion Time extension not allowed?
Extensions do NOT apply;
- Separate re-entry is allowed for subsequent inoperabilities ,
OR
- A completion time with a modified “time zero”
What are the requirements for LCO 3.0.1?
LCO 3.0.1: LCOs shall be met during the MODES or other specified conditions in the Applicability, except as provided in LCO 3.0.2, LCO 3.0.7, and LCO 3.0.8.
