REACTOR Flashcards
why does CVN 70 have a double loop reactor/ reboiler?
1) to prevent contamination from the ship from feeding into Reactor
2) to prevent radiological contamination from feeding into rest of ship
Name a load off the reboiler
- scullery steam
- galley steam
- potable water (hot)
- Laundry steam
locations of reboilers?
- 1A shaft alley
2. 4B shaft alley
5 things that come off the steam generator?
- CTG’s
- SSTG’s
- CAT’s
- ME
- Reboiler
what is DFT used for?
- Deareate water to create purer water to minimize corrosion
- net suction
how does DFT deaerate water?
steam blanket on top of DFT water. water is then heated and gases are allowed to come out of solution.
how much ater do the distilling tanks produce?
100,000/400,000 gallons total per day
Heat cycle of a reactor?
Reactor—primary colant—S/G’s—-Staem loads (CTG’s, SSTG’s, CAT’s, ME)—DFT—-Main feed booster pumps—MFP’s—S/G’s
Classify our reactors
A4W (aircraft carrier 4th generation designed by westinghouse)
location of ME’s
1 & 4 MMR1
2 & 3 MMR2
location of SSTG’s
1 & 2 MMR1
3 & 4 MMR 2
Location of CTG’s
1 & 2 RAR1
3 & 4 RAR2
Location of EDG’s
1 & 2 under Repair locker 2
3 & 4 AFT under supply berthing, under RX male berthing
rating of CTG’s
4160 v, 8 MW, 1388 amps, 3 phase
Rating of SSTG’s
4160 v, 8 MW,1388 amps, 3 phase, 60 hz
difference between CTG’s and SSTG’s?
CTG- Variable frequency
SSTG’s- Constant freuency
what is the source of emergency electrical power?
EDG’s
Main purpose of an EDG?
to provide power to reactor fill pumps
Secondary purpose of EDG’s?
to provide emergencypower to ship in case of loss of all AC
purpose of the reactor fill pumps?
Fill core in case of coolant casualty
rating for EDG’s?
4160 v, 2 MW, 1388 amps, 3 phase, 60 hz
What type of fuel do the reactors use?
Enriched Uranium
Explain the at sea line up for the electric plant?
all 4 SSTG’s powering ring bus
at sea—2 & 4 in parrallel on top half of ring bus and 1 & 3 in parrallel on bottom half of ring bus
when do we set restricted maneuvering ?
- GQ
- man overboard
- CO’s discretion
- in restricted waters
- pulling in and out of port
- underway replenishment
RO
CAPT BIERGUL
ARO
CDR Chambers
Reactor watch standers in DC Central?
EOOW, load dispatcher, water control watch
who is the log recorder/phone talker?
junior most watch stander, comms and temperature
who is the throttleman?
controls speed of main engines
who is CRW?
Chief Reactor Watch–seniormost watch stander in RAR
who is CMO?
Chief Machinery Officer–Seniormost watch stander in MMR
Load dispatcher?
Safe operation of Electric Plants
what does the switchgear operator do?
controls voltage output and frequency to SSTG’ and CTG’s
responsiblities of water control watch?
monitors water inventory for ship and coordinates with CRW/CMO from each plant to maintain water levels at optimal capacities
Principle assistants within reactor dept?
CRA-Chemical Radiological Assistant, RL div
REA-Reactor Electrical Assistant, RE & RC div in RAR
RMA-reactor mechanical assistant RM & RA div in MMR
MPA-Main Propulsion Assistant, RP Div
RMO-Reactor Maintenance Officer
what does it mean for the reactor to be “shutdown”
rods are inserted but no heat is being produced
how does nuclear fission produce energy?
neutron absorbed by uranium splits into neutrons, protons, and gamma’s
what is a simplified primary loop?
pump circulates RX to S/G to cool RX and heat water in S/G for steam
Classify the distilling units
6 stage, flash type, LP, 100,000gpd
Explain the in port line up for the electric plant
ring bus split wit FWD HVSP carrying 1 and 2 S groupsand AFT HVSP carrying 3 and 4 S groups
why are 2 machines in parrallel in at sea line up?
to increase redundancy. if one fails the other can assume the load and prevent loss of power
who is responsible to the load dispatcher?
Switchgear Operators
