RCS Flashcards
1
Q
Purpose of RCS
A
Main- xfr heat from core to secondary
Sec- pressure boundary
- second fission product barrier
- promote nat circ
- moderate neutrons
2
Q
RCS design bases
A
Ensure every penetration has 2 auto close cap- cnmt isolation
Leakage detection capabilities(rad mon, smp lvl, cfcu)- RCS integrity
Handle +/-10 %step, 5% ramp 100-15% pwr, 95% LR- reliable plant load chgs
3
Q
Location PT-405
A
Loop 3 hot leg
4
Q
Location PT-403
A
Loop 4 hot leg
5
Q
Location PT-403A
A
Loop 4 hot leg
6
Q
Location PT-405A
A
Loop 4 hot leg
7
Q
WR RCS Press inputs
PT-403/ 405
A
- SCMM
- RVLIS
- SPDS
- PPC
- CR ind
8
Q
WR RCS Press inputs
PT-403A/ 405A
A
- SPDS
- RHR intlk, (suct. vlvs won’t open if >390 psig)(8701/8702)
- Pzr PORV open signal if > 435 psig (if LTOP armed)
- CR ind
9
Q
RCS flow xmtrs Lp 1 FT-414, 415, 416 Lp 2 FT-424, 425, 426 Lp 3 FT-434, 435, 436 Lp 4 FT-444, 445, 446
A
- SSPS (low flow Rx Trip, < 90% flow)
- CR ind
10
Q
Delta T outputs
A
- indication
- RIL comp (PPC)
- OP(delta)T
- OT(delta)T
11
Q
Tave outputs
A
- OP(delta)T
- OT(delta)T
- P-12 (low-low Tave permissive)
- FW iso
- PPC
- ind
- rod cntrl (auct hi)
- stm dmps (auct hi)
- Pzr lvl cntrl (auct hi)
12
Q
Auctioneered delta T outputs
A
- delta T deviation alarm
- RIL calc (pwr input)
13
Q
Auctioneered Tave outputs
A
- Tave deviation alarm
- Tave hi alarm
- Rod cntrl
- stm dmp cntrl
- Pzr lvl ref
- (if fails hi, thrown out if 10 deg deviation)
14
Q
Precautions and limitations for RCS
A
- during dilutions maintain Pzr [B] and RCS [B] w/in 50 ppm
- max c/d 100 deg/ hr
- max h/u 60 deg/ hr
- maintain press / temp w/ in PTLR
- minimum temp criticality (>541 deg)
15
Q
Unit differences
A
Rx vessel internals differences => unit 2 higher flow rate
