RB Spray

Question 1

Reactor Building Tech Spec with 1 hr actions

Answer 1

Reactor building operable
Modes 1-4

Condition: RB inop
Action: Restore to operable
Time: 1 hr

Question 2

Reactor building air lock Tech spec with 1 hr actions

Answer 2

2 reactor building air locks operable
Modes 1-4
Notes: entry and exit permitted to repair, separate condition entry for each air lock, enter applicable condition when leakage exceeds overall RB leakage rate

Condition: 1+ air locks inop
Action: verify operable door is closed (1 hr) AND Locked (24 hrs)

Condition: 1+ air lock interlock mech inop
Action: Verify operable door is closed (1 hr) AND lock (24 hr)

Condition: 1+ air locks inop for reasons other than A or B
Action: Initiate action to evaluate RB leakage (immed) AND verify door closed in affected air lock (1 hr)

Question 3

reactor building isolation valve tech spec and 1 hr actions

Answer 3

TS: each reactor building isolation shall be operable.
Modes 1-4
Notes: see spec

Condition: (only applicable to penetration paths with 2 RB iso valves) 1+ penetration flow paths with 2 RB iso valves inop
Action: isolate affected penetration flow path with at least 1 closed and deactivated auto valve, closed man valve, or blind flange

Question 4

reactor building spray and cooling tech spec with 1 hr actions

Answer 4

TS: 2 trains of spray and 2 trains of cooling operable
Modes 1-4
1 spray and 1 cooling
Modes 3 & 4

Condition: 2 spray trains inop Modes 1 or 2 OR
Any combo of 3 trains inop Modes 1 or 2 OR
1 required spray & cooling train inop Modes 3 or 4
Action: LCO 3.0.3 (immediately)

Question 5

reactor building pressure tech spec with 1 hr actions

Answer 5

TS: reactor building pressure >= -1.0 psig and <= 3.0 psig
Modes 1-4

Condition: RB press not within limits
Action: restore within limits (1hr)

Question 6

spray additive system tech spec with 1 hr actions

Answer 6

TS: spray additive system operable
modes 1 and 2

NO 1 hr ACTIONS

Question 7

BWST tech specs with 1 hr actions

Answer 7

TS: BWST operable:
40F < T < 110F
2470 +/- 200 ppm
40.2 +/- 1.8 feet
Modes 1-4

Condition: Inop not due to boron or water temp.
Action: restore to operable (1 hr)

Question 8

Design limits on reactor building

Answer 8

286F and 59 psig

design basis 5sqft rupture hot leg

Question 9

Sump recirc flow is throttled to _______ gpm for NPSH concerns?

BWST flow?

Answer 9

1050-1200

1700 gpm

Question 10

Definition of reactor building intact

Answer 10

all 3 hatches closed and sealed
all non-auto valves and blind flanges installed as required
all auto-isolation valves operable or deactivated in closed position
RB total leakage < amount allowed by RCS leakrate

Question 11

Purpose of NaOH

Answer 11

iodine 131 absorption

raises pH, thereby reducing corrosion and H2 formation

Question 12

Function of reactor building spray

Answer 12

Primary: reduce post accident temp and press inside building
secondary: remove iodine during LOCA
Both headers operable = 200% iodine and 100% cooling

Question 13

Spray and cooling iodine-heat removal combos

Answer 13

Iodine: 1 train of spray (both trains is 200% removal)

100% Heat removal: 2 trains of spray, Both Cooling units, 1 spray & 1 cooling unit

Question 14

ES actuations for spray

Answer 14

ES 7/8 starts A/B spray pump after 35 second delay
DH vault coolers start on pump start
Spray blocks cv-2401/2400 open on ES 7/8
BWST ISOs 1407/1408 open on ES 1/3 and 2/4

Question 15

Spray alarms and setpoints

Answer 15

spray hi flow >= 1700 gpm
ES failure = P-35 breaker open 55 seconds after ES 7/8 OR
spray flow <1050 gpm 55 seconds after ES 7/8

Question 16

reactor building spray flow band

Answer 16

1050-1200 gpm

Question 17

Don’t drain sump below ___ level for debris.

Answer 17

30.4%