Liquid rad waste Flashcards
Where does SD water go?
- Condenser
- Monitor tank
- Overboard
- CST
Rule to remember for release valve interlocks (on the release tanks)
Cannot open both tank inlets, both tank outlets, or the inlet and outlet on the same tank at the same time.
Flow loop discharge valves for releases are interlocked to ______.
Prevent opening both valves at the same time.
Key switched release valves will auto close when ______, key ____ be inserted to operate valve and interlocked with ________.
Must insert key to operate valve
Auto close on release hi radiation signal
Auto close when CW blowdown <10,000 gpm
Interlocked with CW blowdown Reset PB
Which rad monitor terminates an overboard release from a release tank?
0PR01J
If high radiation occurs from the outlet of the SG blowdown demin/filters, auto swap will occur from flowpaths _____ to the ______.
Condenser
to the
0A, 0B, and (U2)0C blowdown monitor tanks
What is overboarding?
Allows blowdown to be directed to the CP trench (river return) instead of the condenser.
ALL_____ Auto Close on a ø A Signal or Lo-2 SG level
SD002’s, both units
All U-1 _____ Close on a HELB
SD002’s & SD054’s
ONLY U-2 _____ Close on a HELB
Lower SD002’s & SD054’s
SD007 inlet to the blowdown condenser closes on ______.
13.5 #
SD005 sample isolation valve auto closes _____ for both units.
Phase A
S/G Blowdown System designed to operate under following conditions:
Primary to Secondary leakage of 1.0 gpm concurrent with clad defects in fuel rods generating 1% of rated core thermal power.
Duration of leak equivalent to 2 full‑power weeks per year of operation.
No circ water to condensate leak.
Can you name all the major components in the SD flowpath? (normal and accident)
SD002’s, SD054’s, SD condenser, SD hotwell, SD hotwell Pps, pre-filter, SD demin, after-filter, CP trench or main condenser. If rad monitor in ALARM then flow diverted to SD monitor Tanks.
What is the purpose of the Rad Monitor on pump discharge (0PR05J) for the Turbine building fire and oil sump?
Trips all Fire and Oils Sump Pumps
Can be bypassed at 0PL02J (RW Panel)
Must enter LCOAR when bypassed.
How is the routine processing of SG blowdown and non-blowdown liquid radwaste different?
Blowdown is normally an open processing system with continuous release. Non-blowdown is a closed system with batch releases.
RDCT Pumps operated from 0RE01J: In AUTO, what are setpoints?
80% - Pump _B starts
60% - Pump _A starts
38% - Stops BOTH pumps
Containment sump Pumps discharge to __________
Pumps discharge to Aux. Bldg. Floor Drain Tank
What is the purpose of the weir boxes?
To allow measurement of leakage in the containment sumps.
The containment sump, used to collect unidentified LEAKAGE,
is instrumented to identify leakages of ____ within _____.
1.0 gpm within one
hour.
What will satisfy LCO 3.4.15? leakage detection
the containment sump monitor, in
combination with a gaseous or particulate radioactivity
monitor, provides an acceptable minimum.
What is the purpose of the Key Locked Valves?
Prevents unauthorized or uncontrolled release of radioactive material to the environment.
What are the Normal and Casualty Blowdown rates per S/G?
Normal 45-50 gpm per S/G
180-200 gpm Total
Casualty 90 gpm per S/G 360 gpm per Total
On a high rad condition on_____ the S/G Blowdown Sample Valves 2PS179A-D (which are downstream of the 2SD005s; see TP-5, SD-2) will close. This will only isolate flow to the _____.
2PR008J
Secondary Sampling System.
