Systems Exam 1 - Tech Specs Flashcards
4 Criteria for Items that Must Have Tech Specs
Criterion 1
instruments that detect significant degradation of the Reactor Coolant Pressure Boundary
4 Criteria for Items that Must Have Tech Specs
Criterion 2
initial conditions for design basis accidents or transients
4 Criteria for Items that Must Have Tech Specs
Criterion 3
structure, system, or component that mitigates a design basis accident or transient
4 Criteria for Items that Must Have Tech Specs
Criterion 4
structure, system, or component that is significant to public health and safety
What is CHANNEL CHECK?
qualitative assessment of channel behavior during operation, i.e. comparing a channel’s status and indication to other channels that measure the same thing
What is CORE ALTERATION?
moving fuel, sources, or reactivity components within the reactor vessel when the vessel head is removed and there is fuel in the vessel
NOTE: “Suspension of CORE ALTERATIONS” doesn’t block anyone from moving a component to a safe position
What is LEAKAGE?
Identified, Unidentified, or Pressure Boundary LEAKAGE
What is OPERABLE or OPERABILITY?
A system, subsystem, train, component, or device shall be OPERABLE or have OPERABILITY when it is capable of performing its specified safety function(s) and when all required related/supporting equipment is also capable of performing related support functions.
(Required/related equipment = necessary instrumentation, controls, normal or emergency electrical power, cooling and seal water, lubrication, and other auxiliary equipment.)
What is STAGGERED TEST BASIS?
staggering the testing of components in a particular system (or other group of components) during the required surveillance interval so that all the components are tested within the time frame, but they don’t all have to be tested at once
What is MODE?
Basically gives the operating status of the plant when fuel is present in the reactor through a combination of:
→core reactivity condition
→power level
→avg RCS temp
→reactor vessel head closure bolt tensioning
How are the Tech Specs structured?
“USLDA”
Section 1 - Use and Application
Section 2 - Safety Limits
Section 3 - LCO/SR Applicability
Section 4 - Design Features
Section 5 - Administrative Controls
Mode 1
Power Operation
> 5% power
k-eff ≥ 0.99
Mode 2
Startup
≤ 5% power
k-eff ≥ 0.99
Mode 3
Hot Standby
RCS T-avg ≥ 350
k-eff < 0.99
Mode 4
Hot Shutdown
200 < RCS T-avg < 350
k-eff < 0.99
(all reactor vessel head closure bolts fully tensioned)
Mode 5
Cold Shutdown
RCS T-avg ≤ 200
k-eff < 0.99
(all reactor vessel head closure bolts fully tensioned)
Mode 6
Refueling
RCS T-avg, % power, and k-eff are all N/A
One or more reactor vessel head closure bolts are less than fully tensioned.
What is No Mode?
defueled
What is identified LEAKAGE?
“SAP” - Sump, Atmosphere, Primary (to secondary)
→LEAKAGE like from pump seals or valve packing (except RCP seal water injection or leakoff) that is captured in a sump or collection system
→LEAKAGE into the containment atmosphere from sources that:
→the specific location is identified and
→they don’t interfere with leakage detection systems
→are not pressure boundary leakage
→RCS LEAKAGE through a steam generator to the secondary system (primary to secondary)
What is unidentified LEAKAGE?
all LEAKAGE (except from RCP seal water injection or leakoff) that is not identified LEAKAGE
What is pressure boundary LEAKAGE?
LEAKAGE (except primary to secondary) through a non-isolable fault in an RCS component body, pipe wall, or vessel wall
LCO 3.0.1
LCOs must be met when applicable
LCO 3.0.2
When an LCO is not met, enter all applicable Conditions and complete the Required Actions within the stated Completion Time
“The second shoe drops.”
LCO 3.0.3
If Required Actions/Completion Times are not met or no applicable Conditions are provided, place the plant in a MODE or other specified condition where the LCO does not apply
