C71 - RPS

Question 1

What is the normal and alternate power supply for RPS?

Answer 1

A - normal, 13 alternate, 15

B - normal 14 alternate, 16

Question 2

What are the trips for RPS? (EPA breakers)

Answer 2

Overvoltage > 131 VAC
Undervoltage < 117 VAC
Underfrequency < 57.6 Hz

** 3.5 second time delay, must be manually reset **

Question 3

Where are RPS sensors powered from?

Answer 3

A 1Y87
B 1Y88
C 1Y96
D 1Y95

Question 4

What are the trip logics for RPS A?

Answer 4

RPS “A” is A and C channels

Question 5

What are the trip logics for RPS B?

Answer 5

RPS “B” is B and D channels

Question 6

Are SCRAM pilot valves normally energized or de-energized?

Answer 6

energized

Question 7

Are back-up scram valves normally energized or de-energized?

Answer 7

de-energized

Question 8

Are ATWS/ARI solenoids normally energized or de-energized?

Answer 8

de-energized

Question 9

What are the scram setpoints for RPS?

Answer 9

(bypasses are in parentheses)

1) 1064.7 Rx pressure high
2) 1.23 psig DW pressure
3) 11.4” Rx water level
4) 53.5” in RUN only (not in RUN)
5) Neutron monitoring
6) TSV < 675 psig (< 26% RTP)
7) TCV < 970 psig (< 26% RTP)
8) SDV High level 60% or 64” (REFUEL or
SHUTDOWN and Bypass switch in BYPASS)
9) MSIV closure >6% closed (not in RUN)
10) Manual scram PBs - 2 or more armed & depressed
(signal in for 10 sec after release PBs)
11) Mode switch in SHUTDOWN (10 sec after Mode
switch in SHUTDOWN)

Question 10

where does the APRM upscale thermal come from?

Answer 10

Recirc flow

Question 11

Draw the RPS logic for MSIV TSC TCV

Answer 11

RPS A B C D

MSIV A B C D
(and) D A B C

TCV A B C D

TSV C B A A (Charlie brown as always)
(and) D D B C (Donnie Davis Big Cock)