AOP

Question 1

Does MPC-254 affect rod control?

Answer 1

NO

Question 2

What are the effects if a Tcold instrument fails high?

Answer 2

OPDT and OTDT lower

DT is smaller

Tavg is larger

Question 3

What will happen if a controlling FF instrument fails low til no operator action?

Answer 3

Turbine / Rx trip on High High SG Level and FWI

Question 4

For a load rejection, are LONG TERM effects worse at BOL or EO? And Why?

Answer 4

EOL bc of Xenon Oscillations

Question 5

For a load rejection, are SHORT TERM effects worse at BOL or EO? And Why?

Answer 5

BOL bc not as much temperature feedback.

Question 6

What is the most probably source of CCW out leakage?

Answer 6

RCP Seal Return Hx

Question 7

What is the assumed LD flow for the XS Letdown Hx?

Answer 7

20 gpm

Question 8

What is the first thing you do if you have a suspected RCS Leak?

Answer 8

Place XS LD I/S and isolate normal letdown

Question 9

When do you trip the reactor and enter E-0 during an RCS Leak?

Answer 9

When the leak exceeds the capacity of 2 CCPs

If containment pressure approaches 1 psig

VCT Level cannot be maintained

Question 10

In the Control Air Malfunction AOP, there is a caution about an inadvertent SI. What could this be caused by?

Answer 10

Uneven cooling of the SGs causing steamline dP SI

Question 11

During a spurious phase A, why would the PRT parameters change?

Answer 11

Seal return isolates

Question 12

What is expected to happen when you reset phase A?

Answer 12

CUVs start

Question 13

What happens to rods if MPC-253 fails height?

Answer 13

Rods step out

Question 14

What happens if MPC-253 fails low?

Answer 14

Rods step in

Question 15

What happens if Tave Fails high?

Answer 15

Rods step in

Question 16

What happens if PR Fails High?

Answer 16

Rods step in , but C2 prevents rods from stepping back out due to temp error

Question 17

What happens if PR fails low or Tave fails low?

Answer 17

NO Rod motion

Question 18

If 1 control rod falls into the core, what is affected?

Answer 18

Radial Power distribution.

NOT SDM

Question 19

Which CRID loss is the most survivable?

Answer 19

CRID 3

Question 20

If Train A 250 VD is loss, does the Generator Trip in U1?

Answer 20

NO! Train A supplies 33 VED, so it doesn’t energize

Question 21

Will a single ground on the generator field cause any harm?

Answer 21

No. However, a second groups could cause excessive field current and cause extensive damage

Question 22

Why do we want to keep the generator connected to the grid until the turbine stop valves are closed?

Answer 22

So we don’t Overspeed the turbine

Question 23

If a PRZ Level channel fails high, what does QRV-251 do assuming no operator action?

Answer 23

Throttles to LESS than minimum charging, supply approximately 19 gpm seal injection flow

Question 24

If in M3 and there is a Loss of NESW, what is the required action and impact?

Answer 24

Stop ALL but 1 RCP and perform a pressure relief, containment chillers have lost cooling water

Question 25

While at midloop, what must be done if RHR pump shows fluctuating amps and flow?

Answer 25

Boh RHR pumps are placed in PTL if indications of cavitation are experienced. Starting the other RHR pump could cause air entrainment in the other pump and a complete loss of RHR could occur