Primary Containment Isolation - 1.0 Flashcards
What systems does PCIS initiate isolations?
a. Torus Water Cleanup supply and return (Tech Spec Group 8).
b. Drywell Equipment Drain Sump and Floor Drain Sump discharge to radwaste (Tech Spec Group 9).
c. Drywell Coolers chilled water supply and return (Tech Spec Group 10).
d. CRD to Recirculation Pump seals (Tech Spec Group 11).
e. Containment Atmosphere Control Drywell and Suppression Chamber purge supply and exhaust and nitrogen purge (Tech Spec Group 12).
f. Hydrogen/Oxygen Analyzer sampling and return (Tech Spec Group 13).
g. Containment Hydrogen Recombiner supply and return (Tech Spec Group 14).
h. Primary Containment Instrument Gas supply and return (Tech Spec Group 15).
i. RACS cooling water supply and return (Tech Spec Group 16).
j. PCIG Tip Purge isolation (Tech Spec Group 17).
k. Reactor Coolant Pressure Boundary Leak Detection System sampling and return (Tech Spec Group 18).
Describe the Logic for PCIS.
There are 4 “two-out-of-two” logic channels. Each one of two valves in each penetration is closed by one channel initation. Any 3 logic initiations close all valves.
What differentiates PCIS from NSSS?
Closes valves that connect to primary containment in systems NOT connected to the RPV
What are the LOCA Level 1 isolation signals?
- -129” RPV (From Core Spray)
- 1.68 psig Drywell (From Core Spray)
- Core Spray Manual P.B.
What are the LOCA Level 1 isolation signals?
- -129” RPV (From Core Spray)
- 1.68 psig Drywell (From Core Spray)
- Core Spray Manual P.B.
What are the actuations for PCIG major?
-129” RWL
1.68 # D/W press
1 x 10-3 uCi/cc Rx Bldg Hi-Hi rad
What are the actuations for PCIG minor?
-38” RWL
1.68 # D/W press
1 x 10-3 uCi/cc Rx Bldg Hi-Hi rad
What are the actuations for XCONNECTS?
-129” RWL
1.68 # D/W press
What are the actuations for RHR A?
-129” RWL
1.68 # D/W press
What are the actuations for RHR RW & SAMPLE?
+12.5” RWL
1.68 # D/W press
What are the actuations for RHR B?
-129” RWL
1.68 # D/W press
What are the actuations for RHR SHUTDOWN CLG?
+12.5” RWL
What are the actuations for RCIC VAC BKR(64.5#)?
1.68 # D/W press
What are the actuations for HPCI VAC BKR(100#)?
1.68 # D/W press
What are the actuations for CS TEST RETURN?
-129” RWL
1.68 # D/W press
What are the actuations for FPCC HX XCONNECT?
-129” RWL
1.68 # D/W press
What are the actuations for TIPS?
-38” RWL
1.68 # D/W press
1 x 10-3 uCi/cc Rx Bldg Hi-Hi rad
What are the actuations for TWCU?
-38” RWL
1.68 # D/W press
1 x 10-3 uCi/cc Rx Bldg Hi-Hi rad
What are the actuations for DW SUMPS?
-38” RWL
1.68 # D/W press
1 x 10-3 uCi/cc Rx Bldg Hi-Hi rad
What are the actuations for PRIMARY CONTAINMENT MIMC?
-38” RWL
1.68 # D/W press
1 x 10-3 uCi/cc Rx Bldg Hi-Hi rad
What happens to the PCIS signals upon a loss of 125 VDC?
Loss of the 125 VDC buses will prevent the CS logic from initiating and sending the applicable signals to the PCIS system for Isolations/Initiations.
What does failure of a 481 inverter cause with respect to CS and PCIS logic?
Failure of the UPS power to a specififed CS logic cabinet trip relays will prevent that particular division of CS trip relays from initiating isolation functions from CS to the PCIS system
What does failure of a 482 inverter cause with respect to CS and PCIS logic?
Failure of the UPS power to a specific logic cabinet will prevent that particular division of the PCIS from initiating isolation functions
What are the logic coincidence for initiation?
- Level 1 2/2
- Level 2 2/2
- Hi Rad 2/3
If 3 logics trip, then one valve per each penetration shuts.