ML17354B287

05000280/2017301 05000281/2017301 Final Exam - Post Exam Comments

ML17354B287
Person / Time
Site:	Surry
Issue date:	12/20/2017
From:	NRC/RGN-II
To:
References
50-280/17-301, 50-281/17-301
Download: ML17354B287 (32)

See also: IR 05000280/2017301

Text

Surry Power Station

2017 NRC LICENSE EXAM

POST EXAM COMMENTS

&

EXAM ANALYSIS

Surry 2017 NRC Exam Post Exam Comments Question 1

A. Post Exam Comments:

Source: Applicant 55-23557

Question: 1

Given the following:

• A Reactor Trip occurs on Unit 1 from 100% power.

• 1-ES-0.1, Reactor Trip response, has been implemented.

• Control Bank D Rod H14 IRPI indicates 218 steps.

• All other control rods indicate 0 steps.

• TAVG is 547 oF and stable.

Which ONE of the following completes the statements below?

1) One minute after the trip, shutdown margin is rising due to the decay of

__(1)__.

2) In accordance with 1-ES-0.1, Reactor Trip Response, Emergency

Boration __(2)__ required.

A. 1) Iodine 2) is NOT

B. 1) Iodine 2) is

C. 1) Xenon 2) is

D. 1) Xenon 2) Is NOT

Answer: A

Reference: 1-ES-0.1

Comment: There is some ambiguity with the term shutdown margin vice

reactivity.

Facility The question is adequate as written, no change is required.

Position:

Change None required.

Reference:

Page 2 of 32

Surry 2017 NRC Exam Post Exam Comments Question 8

Source: Applicant 55-23557

Question: 8

The Crew is responding to a SGTR in accordance with 1-E-3, Steam

Generator Tube Rupture.

• The Rapid RCS cooldown has been completed.

Which ONE of the following describes:

1) The subcooling value for RCS depressurization termination.

2) The purpose for the RCS depressurization.

A. 1) 50 °F.

2) Minimize break flow and refill the pressurizer.

B. 1) 50 °F.

2) Minimize Reactor Vessel stress for PTS concerns.

C. 1) 30 °F.

2) Minimize break flow and refill the pressurizer.

D. 1) 30 °F.

2) Minimize Reactor Vessel stress for PTS concerns.

Answer: C

Reference: 1-E-3

Comment: Is 50 °F a potential subset of the answer, 30 °F

Facility We dont agree, there is no subset issue. The question is adequate as written.

Position:

Change None

Reference:

Page 3 of 32

Surry 2017 NRC Exam Post Exam Comments Question 13

Source: Applicant 55-23930

Question: 13

Initial Condition

• Unit 1 is operating at 100% power.

• Unit 2 is in RSD with core off-load to the SFP complete 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> ago.

Current Condition

• A tagging error results in isolation of SW flow to all CC HXs.

• CC surge tank level is 55% and rising.

• CC HX Disch Temp is 76°F and rising.

Which ONE of the following describes:

1) CC Surge Tank High Level alarm setpoint is ___(1)___.

2) The CC Surge Tank Vent Valve ___(2)___ automatically close on

high level.

A. 1) 93%

2) will not

B. 1) 93%

2) will

C. 1) 70%

2) will not

D. 1) 70%

2) will

Answer: A

Reference: ARP 0-VSP-D7, 1-AP-15.00

Comment: Is there a PCS alarm to support 70%?

Facility There is no PCS alarm for this function. Although this question had the highest

Position: Miss rate the question meets the K/A. The question is adequate as written.

Change None

Reference:

Page 4 of 32

Surry 2017 NRC Exam Post Exam Comments Question 15

Source: Applicants 55-23931, 55-23930, and 55-72754

Question: 15

Initial Conditions:

• Unit 1 and Unit 2 are operating at 100%.

• The plant has been notified by SOC that there are significant grid

instabilities due to numerous base load plants being out of service.

• The SOC has requested maximum power generation from both units.

Current Conditions:

• The SOC reports that the 500 KV system is most impacted and the

Emergency Low Limit for that network has been reached.

• The BOP reports the following Unit 1 changes (Note: Unit 2 parameters

are comparable):

GEN GEN Grid Gen Gen Gen H2

MWe MVARS Freq Amps Volts Press

Initial 907 + 10 60 Hz 23,500 22.3 75 psig

KV

Current 1020 - 210 58.0 27,500 21.6 75 psig

Hz KV

Which ONE of the following completes the statements below?

1) Based on the information given the Reactor __(1)__ required to be

tripped.

2) Which Emergency buses are most affected by the current conditions

stated above?

(REFERENCE PROVIDED)

A. 1) is

2) Buses 1J and 2H.

B. 1) is not

2) Buses 1J and 2H.

C. 1) is not

2) Buses 1H and 2J.

D. 1) is

Answer: A

Reference: ARP 1E-D9, 1-E-0

Comment: Stem is confusing. Current conditions, 2nd bullet states, that (Unit 2

parameters are comparable).

Page 5 of 32

Surry 2017 NRC Exam Post Exam Comments Question 15

Facility Although this was another high miss question, the current conditions given

Position: indicate a grid frequency below the RCP breaker trip setpoint. The question is

adequate as written

Change None required.

Reference:

Page 6 of 32

Surry 2017 NRC Exam Post Exam Comments Question 18

Source: Applicant 55-72748

Question: 18

Initial Conditions:

• Unit 1 reactor operating at 100% power.

• The reactor is tripped and safety injection actuated.

• A steam leak is reported in Unit 1 Safeguards.

Current Conditions:

• The Crew has entered ECA-2.1, Uncontrolled Depressurization of All

Steam Generators.

• All SG NR levels are off-scale low.

• RCS Cooldown rate is 155°F/hour.

Which ONE of the following states:

1) What is the MINIMUM AFW flow (gpm) to each SG?

2) Will a transition to 1-FR-H.1 be required after AFW has been throttled?

A. 1) 60

2) No

B. 1) 100

2) No

C. 1) 60

2) Yes

D. 1) 100

2) Yes

Answer: C

Reference: ECA-2.1, FR-H.1

Page 7 of 32

Surry 2017 NRC Exam Post Exam Comments Question 18

Comment: ND-95.3-LP-41, FR-H.1 states the following; If feed flow is reduced due to

operator action to minimize feed flow as instructed in these guidelines

and the capability of providing the minimum feed flow is available, then a

transfer from these procedures is not required and FR-H.1 should not be

performed.

Reference: ND-95.3-LP-41:

Facility It is correct that FR-H.1 should not be performed, but the crew is still required to

Position: transition to FR-H.1 to read the caution, and then exit FR-H.1. License

candidates are trained to transition to appropriate FR and then exit if

appropriate. The question is adequate as written.

Change None required.

Reference:

Page 8 of 32

Surry 2017 NRC Exam Post Exam Comments Question 21

Source: Applicants 55-72754 and 55-23930

Question: 21

Given the following:

• Fuel movement is in progress in the Fuel Building.

• Fuel Handlers report an assembly has been dropped and appears to be

damaged.

• 1-RM-RI-153, FUEL PIT BRIDGE, HIGH Alarm is received.

• The Crew has initiated 0-AP-22.00, Fuel Handling Abnormal

Conditions.

Which ONE of the following identifies:

1) The MCR must be ISOLATED within ___(1)___ minutes.

2) The release is monitored using ___(2)____.

A. 1) 2

2) 1-VG-RI-104, Vent Vent 1 Gas

B. 1) 2

2) 1-VG-RI-131 A/B/C, Vent #2 Gas/Particulate

C. 1) 60

2) 1-VG-RI-104, Vent Vent 1 Gas

D. 1) 60

2) 1-VG-RI-131 A/B/C, Vent #2 Gas/Particulate

Answer: B

Reference: ARP 0-RM-D3, 0-AP-22.00

Comment: (55-72754) The labeling for A2 and C2 is confusing, we dont call it that.

(55-23930) Couldnt flow be aligned to Vent Stack #1?

Facility Regarding the label for A2 and C2; this is the label found in the plant.

Position: Regarding the alignment to Vent Stack #1; yes the flow can be aligned to Vent

stack #1 but there is nothing in the question to indicate a different alignment

than the normal alignment. No change required, the question is adequate as

written.

Change None required.

Reference:

Page 9 of 32

Surry 2017 NRC Exam Post Exam Comments Question 24

Source: Applicant 55-23932

Question: 24

Given the following:

• Unit 1 is operating at 100% power.

• The reactor is tripped and SI actuated.

• Containment pressure is 25 psia and rising slowly.

Which ONE of the following completes the statement:

1-RM-TV-100C, CTMT ATMOS RM INLET I/S TV, closes on a ___(1)___

containment isolation signal, and is checked in the required position using

___(2)___ of 1-E-0, Reactor Trip or Safety Injection.

A. 1) Phase I

2) Attachment 1, System Alignment Verification

B. 1) Phase I

2) Attachment 4, CLS Component Verification

C. 1) Phase II

2) Attachment 4, CLS Component Verification

D. 1) Phase II

2) Attachment 1, System Alignment Verification

Answer: C

Reference: 1-E-0

Comment: Attachment 1, also has direction to check the position of 1-RM-TV-100C.

Facility While the applicant is correct in that Attachment 1 step 8RNO has the position

Position: of 1-RM-TV-100A/B/C checked. This is only done if step 8a is answered as

NO. The stem of the question clearly states that CTMT pressure is 25 psia,

which is above step 8a setpoint of 23 psia. Therefore step 8 RNO should not

be performed and Attachment 4 should be entered at step 8e. The question is

adequate as written, no change is required. Step 8 reference is included on

next page.

Page 10 of 32

Surry 2017 NRC Exam Post Exam Comments Question 24

Change E-0 Attachment 1 step 8 RNO. No change to question is required.

Reference:

Page 11 of 32

Surry 2017 NRC Exam Post Exam Comments Question 28

Source: Applicant 55-72748

Question: 28

Given the following:

• Unit 1 is operating at 29% power.

• 1-RC-P-1A breaker spuriously trips open on overcurrent.

With no operator actions which of the following describes:

1) How Loop A Tavg will change as compared to previous Tave Loop A.

2) The reason for the Loop A Tavg change?

A. 1) Lower 2) due to no forced flow in the loop A.

B. 1) Lower 2) due to reverse flow in the loop A.

C. 1) Higher 2) due to reverse flow in the loop A.

D. 1) Higher 2) due to no forced flow in the loop A.

Answer: B

Reference: ND-95.3-LP-3, Loss of RCS Flow

Comment: For Part 1, why is Tave Lower? Couldnt it be higher? What is the

difference between Reverse Flow and Forward Flow?

Facility Tave is lower because at this power level B and C loops will provide load

Position: demand. Tave is lower because as flow is reversed, Tc rises, Th lowers and

TC is greater than Th. It is not correct to state that there is no forced flow such

as would exist if there was a locked rotor, because flow is reversed due to

forced flow from B and C loops. Re-ran this on the classroom simulator with

the same results. The question is adequate as written, no change is required.

Change None

Reference

Page 12 of 32

Surry 2017 NRC Exam Post Exam Comments Question 31

Source: Applicant 55-23930

Question: 31

Initial Conditions:

• Unit 1 is in CSD with the PRZR solid.

• 1-RC-P-1C, C RCP running for crud burst cleanup.

• RCS temperature is 158 °F and lowering.

• RCS pressure is 305 psig.

• Station Instrument Air is supplying containment, the CMT IA

compressors are in OFF.

Current Conditions:

• Unit 1 Instrument Air header ruptures.

Which ONE of the following completes the statements below:

1) RCS pressure will ___(1)___.

2) Procedure ___(2)___ is used to mitigate the effects of this transient.

A. 1) rise

2) 1-AP-27.00, Loss of Decay Heat Removal Capability

B. 1) lower

2) 1-AP-27.00, Loss of Decay Heat Removal Capability

C. 1) rise

2) 0-AP-40.00, Non-Recoverable Loss of Instrument Air

D. 1) lower

2) 0-AP-40.00, Non-Recoverable Loss of Instrument Air

Answer: C

Reference: 1-AP-27.00, 1-AP-40.00

Comment: Stem is confusing by use of the term Station Instrument Air in last

bullet of stem.

Facility The question is adequate as written, no change is required.

Position:

Reference None required.

Page 13 of 32

Surry 2017 NRC Exam Post Exam Comments Question 42

Source: Applicant 55-23930

Question: 42

Given the following:

• Unit 1 Turbine Control is in IMP IN.

• Control rods are in MANUAL.

• The following parameters are given:

Rx. Pwr Delta T Tave T ref. Gen MWe

89% 90% 569.7 569.7 784

• 1-MS-SOV-104, MSR Steam Supply fails CLOSED.

With no operator action which ONE of the following parameters would be

higher when steady-state conditions are reached?

A. Reactor Power.

B. Generator MWe.

C. T ref.

D. Tave.

Answer: D

Reference: ND-89.3-LP-3, Aux Steam

Comment: Are you sure that Tave will rise? IMP IN vs. IMP OUT appears to support

this question.

Facility Re-ran the question scenario on the classroom simulator with similar results,

Position: that support Tave rising, steady state to steady state. No change in the

question is required.

Reference None

Page 14 of 32

Surry 2017 NRC Exam Post Exam Comments Question 53

Source: Applicants 55-72746 and 55-72748

Question: 53

Initial Conditions:

• 1-SW-P-10A, CHG Pump SW Pump, is running in HAND

• 1-SW-P-10B, CHG Pump SW Pump is in AUTO and OFF.

• 1D-G5, SW or CC PPS DISCH TO CHG PPS LO PRESS has just

alarmed.

Current Conditions (2 minutes later):

• 1-SW-P-10A, CHG Pump SW Pump, continues running in HAND.

• 1-SW-P-10B, CHG Pump SW Pump is in AUTO and OFF.

• The Service Building Inside Operator reports the following readings:

Parameter Previous Curren

1-SW-DPI-100A, 1-VS-S-1A, SW Strainer D/P 0.8 psid 0.8 psid

1-SW-DPI-27, 1-SW-S-2A, SW Suct. Strainer D/P 0.2 psid 1.8 psid

1-SW-PI-140A, 1-SW-P-10A, Suction press 3.8 psig 0.8 psig

1-SW-PI-26, 1-SW-P-10A, discharge pressure 27.5 psig 6 psig

Which of the following describes the actions the operator must take per 0-AP-

12.00, Service Water System Abnormal Conditions?

A. Start 1-SW-P-10B, place duplex strainer 1-SW-S-10 in service, and open

Cross-tie.

B. Place 1-SW-S-2A, suction strainer standby basket in service, and vent 1

C. Start 1-SW-P-10B, stop and vent 1-SW-P-10A, place 1-SW-S-2A, suctio

basket in service.

D. Place additional SW header in service, vent all three SW headers, vent 1

pump.

Answer: C

Reference: 0-AP-12.00

Comment: Choice B is also correct. 0-AP-12.00 Step 4 RNO supports choice B also

since the sub steps are bulleted and not numbered those steps can be

performed in any order.

Facility We agree with the applicants that choice B and C are both correct. Supporting

Position: documentation attached on the next page.

Page 15 of 32

Surry 2017 NRC Exam Post Exam Comments Question 53

Change 0-AP-12.00 (below)

Reference

Problem Statement: Although the correct answer Start 1-SW-P-10B, stop and vent 1-SW-P-

10A, place 1-SW-S-2A, suction strainer standby basket in service is

correct, conditions in the stem draw for a conclusion that the suction

strainer is fouled. The strainer DP is outside acceptable limits (Log

Spec) and therefore it is reasonable to conclude that placing the standby

suction strainer would restore pump function. Therefore, distracter B -

Place 1-SW-S-2A, suction strainer standby basket in service, and vent 1-

SW-P-10A is not only a reasonable response, but is an allowable

course of action within AP-12.00.

Page 16 of 32

Surry 2017 NRC Exam Post Exam Comments Question 53

Supporting Facts:

• Refer to the associated steps of AP-12.00 (full marked up and non-marked up copies are

attached to the email).

Step 4 flows as given below on page 3 using information provided in stem

Page 17 of 32

Surry 2017 NRC Exam Post Exam Comments Question 53

Step 4 continued (page 4)

Substep (marked A and B below) are of the same level of indent and although A is the

more appropriate action, B contains corrective actions for this scenario. It would be

reasonable for a team, performing a scenario with the given conditions, could choose either the

A or B path.

Page 18 of 32

Surry 2017 NRC Exam Post Exam Comments Question 53

Conclusion:

- Question 53 contains two correct answers as the reference given (AP-12.00) contains

response actions that support B and C answers.

Statement from Operations (Jim Shell - Assistant Operations Manager)

Question 53 - both answers B and C will restore the function of cooling to the

charging/HHSI pumps by restoring charging service water flow and in AP-12,

procedurally both are acceptable solutions the way the procedure is currently written

with the indications provided.

Page 19 of 32

Surry 2017 NRC Exam Post Exam Comments Question 57

Source: Applicant 55-23931

Question: 57

Given the following:

• A steam generator tube rupture has occurred.

• Due to multiple failures, the PRZR spray and PORVs are

unavailable to depressurize the RCS.

• PRZR level is offscale low.

• The Crew is attempting to re-establish Letdown flow in accordance

with ECA-3.3, SGTR with loss of Pressure Control.

In accordance with 1-ECA-3.3, which ONE of the following identifies:

1) The ______ fuses for LC-1-460C and LC-1-459C are removed.

2) 1-CH-LCV-1460A and B _______.

A. 1) input

2) open automatically

B. 1) input

2) are opened manually

C. 1) output

2) open automatically

D. 1) output

2) are opened manually

Answer: D

Reference: 1-ECA-3.3

Comment: Isnt B also correct? Wouldnt pulling the input fuses also allow 1-CH-

LCV-1460 A and B to be opened?

Facility No ECA-3.3 specifically states the output fuses. The question is adequate as

Position: written, no change required.

Change None

Reference

Page 20 of 32

Surry 2017 NRC Exam Post Exam Comments Question 62

Source: Applicant 55-72746

Question: 62

Given the following:

• Unit 1 is operating at 100%.

• Condenser Vacuum is 27.6 inches Hg and is lowering 0.4 inches

Hg/minute.

• Turbine 1 and 2 operators dispatched to look for leaks.

• Generator Megawatts are 890 Mwe and lowering rapidly.

• Annunciator 1A-G1, Traveling Screens Hi Diff Lvl is Lit.

Which of the following completes the following statements:

1) __(1)__ is required to be entered.

2) 1-E-0 is required to be entered if Main Condenser Vacuum lowers to

__(2)__.

A. 1) 0-AP-12.01, Loss of Intake Canal Level

2) 25.0 in-Hg

B. 1) 0-AP-12.01, Loss of Intake Canal Level

2) 22.5 in-Hg

C. 1) 1-AP-14.00, Loss of Main Condenser Vacuum

2) 25.0 in-Hg

D 1) 1-AP-14.00, Loss of Main Condenser Vacuum

2) 22.5 in-Hg

Answer: D

Reference: 1-AP-14.00

Comment: Wouldnt choice C also be correct? I based my answer on C because

at this vacuum, steam dumps will be lost?

Facility 1-AP-14.00 specifically states that if Condenser vacuum lowers to 22.5 in - Hg,

Position: the turbine must be tripped (if power is > 10%). The question is adequate, no

change is required.

Reference None

Page 21 of 32

Surry 2017 NRC Exam Post Exam Comments Question 63

Source: Applicant 55-72748

Question: 63

Unit 1 is operating at 100% when the Reactor Operator notices that Main Feed

Pump suction pressure has lowered on both Main Feed pumps and is now

reading 400 psig (20 psig lower than before).

Which one of the following identifies a possible cause for this lower reading.

A. 1-SD-LCV-106, HP Heater Drain Pump Level Control valve fails OPEN.

B. 1-CN-FCV-107, Condensate Recirculation valve inadvertently opened.

C. 1-CP-MOV-100, Condensate Polisher Bypass valve fails OPEN.

D. 1-CN-126, Condensate bypass for LP FW Heaters 2, 3 and 4

inadvertently opened.

Proposed Answer: B

Answer: B

Reference: ND-89.3-LP-2

Comment: Why wouldnt choice A also be correct? Isnt 1-SD-LCV-106 the divert

valve?

Facility 1-SD-LCV-106 is the normal Discharge LCV to the Feed Pump Suctions. 1-

Position: SD-LCV-107 is the divert valve. Opening 1-SD-LCV-106 further will cause a

rise in Feed pump suction pressure. No change is required, the question is

adequate.

Reference None

Page 22 of 32

Surry 2017 NRC Exam Post Exam Comments Question 67

Source: Applicant 55-72748

Question: 67

Which ONE of the following completes the statement from 1-GOP-1.4, Unit

Startup, HSD to 2% Reactor Power, concerning the Reactivity Plan provided

by Reactor Engineering?

The plan shall contain recommendations for control of Delta Flux, rod

height and/or Boron adjustments, and _____.

A. expected Xenon transient

B. startup rate limitations

C. RCS temperature control

D. source range counts at doubling points

Answer: A

Reference: 1-GOP-1.4

Comment: Choice C is also correct per GOP-1.4, Attachment 6 and 7.

Facility We agree. Although the correct answer expected Xenon transient is correct,

Position: 1-GOP-1.4 also references the distractor RCS temperature control in

attachment 7 (refer to following pages).

Reference 1-GOP-1.4

Page 23 of 32

Surry 2017 NRC Exam Post Exam Comments Question 67

Supporting Facts:

• This question references step 5.1.3 to support the correct answer:

And in this reference, Tave is not listed, but upon review of attachment 7 (Reactivity

Control and Monitoring During Startup), the following is given:

The statement Use the Reactivity Plan as a guide infers that the plan contains

this information.

• Upon review of an engineering supplied reactivity plan, Tave is a parameter given as a

reference (see next page)

Page 24 of 32

Surry 2017 NRC Exam Post Exam Comments Question 67

Page 25 of 32

Surry 2017 NRC Exam Post Exam Comments Question 67

Conclusion:

- Question 67 contains two correct answers as the reference given (GOP-1.4) contains

supportive information for A and C.

Statement from Operations (Jim Shell - Assistant Operations Manager)

Question 67. Based on the reactivity plan provided by reactor engineering referenced in

GOP-1.4, although A is correct as we submitted, C is also a correct answer since RCS

temp control is specifically on the reactivity plan and referenced in GOP-1.4 attachment

7.

Page 26 of 32

Surry 2017 NRC Exam Post Exam Comments Question 69

Source: Applicant 55-23930

Question: 69

According to surveillance procedure 1-OPT-RC-10.00, Reactor Coolant

Leakage-Computer Calculated, which of the following parameters is an input

into the calculation for IDENTIFIED RCS leakage?

A. Pressurizer Level.

B. VCT Level.

C. Pressurizer Relief Tank Level.

D. Containment Sump Level.

Answer: C

Reference: 1-OPT-RC-10.00

Comment: Believe choice B is also correct as VCT level is used to determine how

you calculate identified leakage.

Facility VCT, and Pressurizer level are used to calculate Total Leakage. Total leakage

Position: minus Identified leakage (PRT and PDTT level) would equal Unidentified

leakage. The question is adequate, no change is required.

Reference None required.

Page 27 of 32

Surry 2017 NRC Exam Post Exam Comments Question 75

Source: Applicant 55-23930

Question: 75

Given the following:

0130 Unit 1 was at 100% power when a spurious Safety Injection

occurred.

0131 The crew enters 1-E-0, Reactor Trip or Safety Injection.

0145 The crew transitions to 1-ES-1.1, SI Termination.

0155 The RCS is solid and PRZR PORV,1-RC-PCV-1456 begins to

cycle.

0158 HHSI flow has been isolated and charging placed in service.

0212 While placing letdown in service 1-RC-PCV-1456 opens and will

not close.

0217 The block valve for 1-RC-PCV-1456 will not close.

- RCS pressure is 1000 psig and lowering rapidly.

- All steam generators are at 900 psig and slowly lowering.

Which ONE of the following describes the correct actions and procedure

implementation.

A. Initiate Safety Injection and go to 1-E-0, Reactor Trip or Safety

Injection.

B. Transition to 1-E-1, Loss of Reactor or Secondary Coolant, and

use 1-E-1 guidance to reinitiate Safety Injection.

C. Manually start charging pumps and align HHSI flow path, and go

to 1-ES-1.2 Post LOCA Cooldown and Depressurization.

D. Manually start charging pumps and align HHSI flow path, and go

to 1-E-1, Loss of Reactor or Secondary Coolant.

Answer: D

Reference: 1-ES-1.1

Comment: The CAP page of 1-ES-1.1 affirms the answer of D.

Facility We agree, the question is adequate, no change is required.

Position:

Reference None required.

Page 28 of 32

Surry 2017 NRC Exam Post Exam Comments EXAM ANALYSIS Q13

B. EXAM ANALYSIS

2017 NRC Exam Questions with High Miss Rate (>50%)

Question: !13!

Initial Condition

• Unit 1 is operating at 100% power.

• Unit 2 is in RSD with core off-load to the SFP complete 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> ago.

Current Condition

• A tagging error results in isolation of SW flow to all CC HXs.

• CC surge tank level is 55% and rising.

• CC HX Disch Temp is 76°F and rising.

Which ONE of the following describes:

1) CC Surge Tank High Level alarm setpoint is ___(1)___.

2) The CC Surge Tank Vent Valve ___(2)___ automatically close on high level.

A. 1) 93%

2) will not

B. 1) 93%

2) will

C. 1) 70%

2) will not

D. 1) 70%

2) will

Proposed Answer: A.

Analysis: Question Miss Rate 80%. Seven (7) Candidates chose C, One (1) chose B, 2 chose

correct answer. Question dealt with knowledge of CC surge tank high level alarm setpoint and

conditions the tank vent valve to close. Part 1) Annunciator Response Procedure high level

alarm setpoint is 93%; distractor setpoint (70%) based on reasonable assumption that tank low

level alarm is approximately 20% below normal level, the high alarm would be approximately

20% above normal. Part 2) tests knowledge of signals that close tank vent; vent closes on CC

system High Radiation. Distractor based on Candidate confusion of operation of tank vent valve

with feed heater high level which secures flow to the feed heater.

Question is acceptable, no change required.

Page 29 of 32

Surry 2017 NRC Exam Post Exam Comments EXAM ANALYSIS Q15

Question: !15!

Initial Conditions:

• Unit 1 and Unit 2 are operating at 100%.

• The plant has been notified by SOC that there are significant grid instabilities due to

numerous base load plants being out of service.

• The SOC has requested maximum power generation from both units.

Current Conditions:

• The SOC reports that the 500 KV system is most impacted and the Emergency Low

Limit for that network has been reached.

• The BOP reports the following Unit 1 changes (Note: Unit 2 parameters are

comparable):

GEN MWe GEN Grid Freq Gen Amps Gen Volts Gen H2

MVARS Press

Initial 907 + 10 60 Hz 23,500 22.3 KV 75 psig

Current 1020 - 210 58.0 Hz 27,500 21.6 KV 75 psig

Which ONE of the following completes the statements below?

3) Based on the information given the Reactor __(1)__ required to be tripped.

4) Which Emergency buses are most affected by the current conditions stated above?

(REFERENCE PROVIDED)

A. 1) is

2) Buses 1J and 2H.

B. 1) is not

2) Buses 1J and 2H.

C. 1) is not

2) Buses 1H and 2J.

D. 1) is

2) Buses 1H and 2J.

Proposed Answer: A

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Surry 2017 NRC Exam Post Exam Comments EXAM ANALYSIS Q15

Analysis: Question Miss Rate 60%. Four (4) Candidates chose correct response, Two (2)

chose distractor B, two (2) chose distractor C, and two (2) chose distractor D. Question based

on Candidate analysis of data provided to determine that a reactor trip is required based on 2/3

Station service bus underfrequency (<58.05 Hz), and knowledge of 500 kV distribution from

switchyard to emergency buses via the RSSTs. Part 1) distinguishes Candidate knowledge of

reactor trip setpoints. Part 2) assesses Candidate knowledge of Electrical Distribution.

Question is acceptable, no change required.

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Surry 2017 NRC Exam Post Exam Comments EXAM ANALYSIS Q69

Question: !69!

According to surveillance procedure 1-OPT-RC-10.00, Reactor Coolant Leakage-Computer

Calculated, which of the following parameters is an input into the calculation for IDENTIFIED

RCS leakage?

A. Pressurizer Level.

B. VCT Level.

C. Pressurizer Relief Tank Level.

D. Containment Sump Level.

Proposed Answer: C

Analysis: Question Miss Rate 60%. Four (4) Candidates chose correctly, four (4) chose

distractor B, one (1) chose distractor A, and one (1) chose distractor D. Question dealt with

determination of RCS leak rate. Leak rate is determined by calculating the Total change in RCS

Inventory and subtracting Identified Leakage to determine Unidentified leakage. A and B

responses are used in the calculation of the change in RCS Inventory. Change in PRT and

PDTT are considered Identified leakage (response C). Response D is Unidentified since any

condensation or leakage of any component/system inside of containment would be collected in

the containment sump.

Question is acceptable, no change required.

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