NOP

Question 1

What is the basis for not being critical with RCS Tavg belting less than 541*F?

Answer 1

MTC is within its analyzed temp range

Protective instrumentation is within its normal operating rage

PRZ is capable of being in an operable state w a steam bubble

Rx Vessel is above its minimum RTNDT temperature

Question 2

What could happen if PRZ concentration is different than RCS concentration?

Answer 2

Outsure to the RCS. It may be borate or diluted, causing a RCS Temperature transient

Question 3

After tripping the Rx, how long will it take for SR to energize?

Answer 3

10-15 mins

Question 4

How many RCPs are required to be in operation with Tave > 541*F? Why?

Answer 4

All 4

Ensures protective instrumentation associated with the loops are operable

Question 5

When is an RCS Sample for iodine required?

Answer 5

Load Reduction of 15% in 1 hour

Question 6

If U2 is in mode 5 and the East RHR pump is in service, how is letdown flow affected if the RHR pump is lost?

Answer 6

LD flow is reduced due to loss of RHR pump discharge pump

Question 7

Why is 600 gpm of RHR diverted to the HLs?

Answer 7

To ensure Loop 3 HL remains subcooled uring PRZ Outsurge

Question 8

Why must NLI-151 be used with a correction figure during cool down to determine PRZ Level?

Answer 8

Cold Cal indicator compares the weight of the water in the PRZ vs the weight in the ref column. The cold cal was calibrated at 150*F, so there may be a density difference between the reference and the cold cal

Question 9

Why is there only 1 RHR pump running at a time during half loop?

Answer 9

To prevent air entrainment

Question 10

What mode must we be in tor remove power from RHR Suction valves?

Answer 10

Mode 5 to prevent closure. Must have power available in M4 for possible LOCA

Question 11

How much heat is added from all 4 RCPs?

Answer 11

12-14 MW

Question 12

Why is Hydrogen used to cool the main generator?

Answer 12

High thermal conductivity

Low windage losses

Non conductive

Non corrosive

Cheap

Question 13

Criticality occurs in approximately how many doublings?

Answer 13

5 to 7

Question 14

When is criticality declared?

Answer 14

Rx is actually super-critical, indicated by:

Constant + SUR
Rising Neutron counts rate without rod motion

Question 15

What happens if you add positive reactivity when critical but below POAH?

Answer 15

Power rises until POHA or sufficient negative reactivity is added to stop the power rise

Question 16

Does the Control Air Compressor Load Shed?

Answer 16

NO!!!!!! But the PAC does.