Intro to Tech Specs Flashcards
What is the name of Tech Spec Chapter 1
Use and Application
What is the name of Tech Spec Chapter 2
Safety Limits
What is the name of Tech Spec Chapter 3
Limiting Conditions
What is the name of Tech Spec Chapter 4
Design Features
What is the name of Tech Spec Chapter 5
Admin Controls
READ THIS SECTION!!
If TS Safety Limit 2.1.1(DNB) is violated, what needs to be done?
Required to be in Mode 3 w/in 1 hr
What are the assumptions of Final Safety Analysis Report (FSAR)?
- One train of ECCS is assumed to fail
- One instrument failure would neither cause or prevent ECCS actuation
- One accumulator is lost through a break
What does Surveillance Requirement 3.0.2 state in regards to Grace?
Grace period of 25% (Drop dead due date)
What does Surveillance Requirement 3.0.3 state in regards to a missed surveillance?
Must meet within 24 hrs or normal surveillance frequency, whichever is greater
What does LCO 3.0.3 state:
1. When an LCO is not met and the associated ACTIONS are not met, an associated ACTION is not provided, or
2. if directed by the associated ACTIONS, the unit shall be placed in a MODE or
3. other specified condition in which the LCO is not applicable.
Action shall be initiated within 1 hour to place the unit, as applicable, in:
a. MODE 3 within 7 hours;
b. MODE 4 within 13 hours; and
c. MODE 5 within 37 hours.
What is the purpose of the Reactor Core DNB Safety Limits?
Prevent overheating of the fuel and cladding, which would result in release of fission products to the RCS if not prevented
What is the purpose of the RCS pressure Safety Limits
Prevents over pressurization of the RCS and maintains integrity which then prevents the release of radionuclides contained in the RCS from reaching the containment atmosphere
Can you extend a Surveillance Requirement if its the initial surveillance after the initial event?
No, you can only extend 25% for subsequent surveillances after the initial surveillance has been complete
The amount of time allowed for completion of a Required Action is the definition of?
Completion Time
Required Actions must be completed prior to the expiration of the specified Completion Time
Equipment is assumed to be Operable if its what are met?
If its SRs are met
Equipment is inoperable if?
Ref SR 3.0.1
Equipment is Inoperable if
- It is known to be inoperable, even if the SRs are current
- An SR is known not to be met, even if the SR is between its required performance interval
Surveillance Requirements do not have to be performed when?
when the associated LCO is not applicable, unless specifically stated, or on inoperable equipment or variables that are outside limits
Do Surveillance Requirements have to be performed following maintenance prior to returning equipment to Operable status?
Yes, unless otherwise stated
Is SR 3.0.2 (Grace) used to routinely extend the performance intervals?
No, it is not intended to be used to routinely extend the performance interval. It allows for unforeseen problems that may prevent performance of the SR during the normal interval. 25% extended time if needed
Which Surveillance Requirement allows for an operational relief if a surveillance is missed?
SR 3.0.3
24 hours or the specified Frequency
If the 24 hr delay period is surpassed within SR 3.0.3, what must you do?
A risk evaluation must be performed
Why is there a shorter time constraint (5 minutes) while in Modes 3, 4 and 5 with the TS Safety Limit Violation 2.2.2.2?
Brittle Fracture is more likely
Define Loss of Safety Function
When a safety function assumed in the accident analysis cannot be performed. A LOSF may exist when a support system is inoperable and a required system redundant to the support or supported systems is also inoperable
assuming no concurrent single failure / LOOP or loss of onsite EDG(s)
What does LCO 3.0.6 state for cascading Tech Specs?
Do not need to cascade unless there is a loss of safety function
What is the TS Safety Limit Bases?
Bases on not violating following fuel criteria
- 95% probability with 95% confidence level that the hottest fuel rod in the core does not experience DNB - 95% probability with 95% confidence level that the hottest fuel pellet in the core will not experience centerline fuel melting
If you’re in Mode 3, 4 or 5, what must be done if the TS Safety Limit for RCS Pressure is violated.
Restore compliance within 5 minutes
How is Mode 1 Defined?
Power Operations
Greater than or equal to 0.99 Keff
Greater than 5% Rated Thermal Power
How is Mode 2 Defined?
Startup
Greater than or equal to 0.99 Keff
Less than or equal to 5% Rated Thermal Power
How is Mode 3 Defined?
Hot Standby
Less than 0.99 Keff
Greater than or Equal to 350 degrees
How is Mode 4 Defined?
Hot Shutdown
Less than 0.99 Keff
Temperature between 200 degrees and 350 degrees
How is Mode 5 Defined?
Cold Shutdown
Less than 0.99 Keff
Temperature less than or equal to 200 degrees
How is Mode 6 Defined?
Refueling
One ore more reactor vessel head closure bolts less than fully tensioned
What is the RCS Pressure limit and when is it applicable?
SHALL be less than or equal to 2735 psig in Modes 1-5
Define Limited Condition for Operation (LCO)
The lowest functional capability or performance level of equipment required for safe operation of the facility
Define Shutdown Margin (SDM)
The instantaneous amount of reactivity by which the reactor is subcritical or would be subcritical from its present condition assuming all rods fall into the core with 1 RCCA (highest reactivity worth) is fully withdrawn and
in MODES 1 and 2, the fuel and moderator temps are changed to the nominal zero power design level.
Who is responsible for overall safe operation of the Units?
Plant Manager
Can an Operating Crew fall below minimum staffing?
If so, what are the limitations?
YES, for less than or equal to 2 hours for unexpected absence, provided IMMEDIATE action is taken to restore to minimum staffing
What does Chapter 5, Admin Controls, state about RP staffing?
A RP Tech shall be on site when fuel is in the reactor. Same 2 hour grace as the operating crew for unexpected absences
If TS Safety Limit 2.1.2 (RCS Pressure) is violated in Mode 1 or 2, what needs to be done?
Restore compliance and be in Mode 3 within 1 hour
When is a TS Completion Time Extension not allowed?
When allowed a completely separate re-entry into the Condition (for each train, subsystem, component, or variable expressed in the Condition)
When does the completion time clock being?
Unless otherwise specified, when a SRO makes the determination that an LCO is not met and an
ACTIONS Condition is entered
What 2 criteria must be met to utilize a completion time extension?
The subsequent inoperability:
a. Must exist concurrent with the first inoperability; and
b. Must remain inoperable or not within limits after the first inoperability is resolved.
Per LCO 3.0.4, when can you change modes with inoperable equipment required for that mode? (unless noted otherwise)
If you can operate indefinitely
or
perform a risk assessment
(Unless tech specs specifically state otherwise)
Per TS 3.8.1 B, (AC Sources - Operating), what must be done within 1 hour of an EDG being declared INOPERABLE?
Both SDGs must be verified available (can be administratively)
and
Perform STP21
Per Chapter 5 of tech specs… Who has overall command function for the Units?
Shift Manager
If you enter LCO 3.0.3 due to conditions but then the first inop piece of equipment comes back before your LCO 3.0.3 time limits are met, can you apply the extension?
As long as separate entries are not allowed, and the other rules are met, yes!
