3.5 Passive Core Cooling System (PXS) Flashcards
3.5.1 Accumulators
Both Accumulators OPERABLE (2600 - 2900 ppm, outlet valve open, cover gas 637 - 769 psig and volume 1667 - 1732 cu. ft)
APPLICABILITY MODES 1, 2, 3 and 4 with RCS pressure >1000 psig.
ACTIONS
A. 1 INOP due to boron concentration, restore within 72 hours
B. 1 INOP other than in A, restore to OPERABLE within 8 hours (1 hour from entry concurrent with LCO 3.5.2 Cond C or E).
C. Required completion time of A or B not met, MODE 3 within 6 hours and reduce pressure ≤ 1000 psig within 12 hours
D. 2 INOP = 3.0.3
3.5.2 CMTs - Operating
Both CMTs Operable (Temp <120°F, inlet valve OPEN, boron 3400 - 4500 ppm)
APPLICABILITY: MODES 1, 2, 3, and 4 with RNS not cooling the RCS
ACTIONS
A. One CMT INOP due to outlet valve, restore within 72 hours
B. One CMT INOP due to water temp or boron concentration, restore within 72 hours.
C. Two CMTs inop due to water temp or boron concentration, restore at least one within 8 hours ( 1 hour if entry concurrent with LCO 3.5.1 condition B)
D. One CMT inlet line with noncondensible gas volume not within limit, restore within 24 hours
E. One CMT INOP orther than A, B, or D, restore to OPERABLE within 8 hours (1 hour if entry concurrent with LCO 3.5.1 condition B).
F. Required action of A, B, C, D, or E not met or 2 CMTs INOP other than water temp or boron concentration, Be in MODE 3 within 6 hours and MODE 5 within 36 hours.
3.5.3 CMTs - Shutdown, RCS Intact
One CMT OPERABLE
APPLICIBALITY: MODE 4 with RNS cooling RCS and MODE 5 RCS not vented
ACTIONS
A. Required CMT INOP due to one outlet isolation valve inop, restore within 72 hours
B. Required CMT INOP due to water temp or boron concentration, restore within 72 hours.
C. Not within noncondensible gas limit in MODE 4, restore within 24 hours OR MODE 5 within 24 hours
D. INOP for reasons other than A, B or C, restore to OPERABLE within 8 hours.
E. Required actions not complete, initiate actions to be in MODE 5 with RCS vented IMMEDIATELY.
3.5.4 PRHR HX shall be OPERABLE
APPLICABILITY: MODES 1, 2, 3, and 4 with RNS not cooling the RCS
ACTIONS
A. One air operated PRHR HX outlet valve inop, restore within 72 hours.
B. One IRWST gutter valve inop, restore within 72 hours.
C. PRHR HX inlet line noncondensible gas not within limit, restore within 24 hours.
D. Required action/completion time of A, B, or C not met, Be in MODE 3 within 6 hours and MODE 4 with RNS in service within 24 hours.
E. LCO not met for reasons other than A, B, or C, restore PRHR HX to OPERABLE within 8 hours
F. E not met, be in MODE 3 within 6 hours and MODE 5 within 36 hours (if redundant means of cooling the RCS (SG/Feedwater) (and RNS MODE 5), then suspend LCO 3.0.3 and any action requiring mode changes. Completion times for F are from times redundant equipment is available.
3.5.5 PRHR HX - Shutdown, RCS intact
- NOTE -
PRHR HX is not required to be OPERABLE in MODE 5 during RCS
vacuum fill operations.
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ACTIONS
A. One outlet valve inop, restore within 72 hours
B. One IRWST gutter valve inop, restore within 72 hours
C. Noncondensible gas volume too high, restore within 24 hours
D. INOP other than A, B, or C, restore within 8 hours.
E. Actions/completion times not met, IMMEDIATELY initiate action to be in MODE 5 with RCS pressure boundary open.
3.5.6 IRWST - Operating
2 injection flow paths and 2 containment recirc flow paths OPERABLE
APPLICABILITY: MODES 1, 2, 3, and 4.
A. One IRWST injection or containment recirc line actuation valve flow path inop, restore within 72 hours
B. One IRWST injection flow path with noncondensible gas in one squib outlet line, restore within 72 hours.
C. One IRWST injection flow path with noncondensible gas in both squib outlet lines, restore at least 1 within 8 hours.
D. IRWST boron(2600-2900ppm)/temp(<120°F)/volume( ≥70,907 cu. ft and < 73,100 cu. ft) not within limits, restore within 8 hours
E. One motor operated isolation not full open OR power not removed from one or more motor isolation valve restore within 1 hour
F. Required action and time of A, B, C, D, or E not met or LCO not met for other reasons, Be in MODE 3 in 6 hours and MODE 5 within 36 hours.
3.5.7 IRWST - Shutdown, MODE 5
1 injection flow paths and 1 containment recirc flow paths OPERABLE
APPLICABILITY: MODE 5
A. Required IRWST containment recirc line valve not full open, restore within 72 hours
B. Required IRWST injection flow path with noncondensible gas in one squib outlet line, restore within 72 hours.
C. Required IRWST injection flow path with noncondensible gas in both squib outlet lines, restore at least 1 within 8 hours.
D. IRWST boron(2600-2900ppm)/temp(<120°F)/volume( ≥70,907 cu. ft and < 73,100 cu. ft) not within limits, restore within 8 hours
E. Required motor operated isolation not full open OR power not removed from required motor isolation valve restore within 1 hour
F. Required action and time of A, B, C, D, or E not met or LCO not met for other reasons, IMMEDIATELY initiate action to establish ≥ 20% pressurizer level with RCS intact AND suspend positive reactivity additions.
3.5.8 IRWST - Shutdown, Mode 6
1 injection flow paths and 1 containment recirc flow paths OPERABLE
APPLICABILITY: MODE 6
A. Required IRWST containment recirc line isolation valve not full open, restore within 72 hours
B. Required IRWST injection flow path with noncondensible gas in one squib outlet line, restore within 72 hours.
C. Required IRWST injection flow path with noncondensible gas in both squib outlet lines, restore at least 1 within 8 hours.
D. IRWST AND Refueling cavity boron(2600-2900ppm)/temp(<120°F)/volume( ≥70,907 cu. ft and < 73,100 cu. ft) not within limits, restore within 8 hours
E. Required motor operated isolation not full open OR power not removed from required motor isolation valve restore within 1 hour
F. Required action and time of A, B, C, D, or E not met or LCO not met for other reasons, IMMEDIATELY initiate action to establish cavity level ≥ 23 feet above the flange AND suspend positive reactivity additions.
