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Systems 11-13-19 > SQ (Radiation Monitors) > Flashcards

SQ (Radiation Monitors) Flashcards

1
Q

A high alarm on RU-155D, RCS Letdown monitor, is indicative of…

A. RCS fuel cladding failure.
B. High activity levels in the Purfication IX area.
C. RCS leakage into the Nuclear Cooling Water System.
D. High activity levels in the Letdown heat exchanger area.

A

A. RCS fuel cladding failure.

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2
Q

Unit 1 has entered 40AO-9ZZ03, Loss of Cooling Water.
Essential Cooling Water train ‘A’ has been cross-tied to the Nuclear Cooling Water system.
An RCS leak into the Nuclear Cooling Water system now occurs.
The Process Radiation Monitoring system will respond by…

A. No monitors going into alarm.
B. Alarming RU-6 Nuclear Cooling Water only.
C. Alarming RU-2, ‘A’ Essential Cooling Water only.
D. Alarming RU-2, ‘A’ Essential Cooling water and RU-6 Nuclear cooling water.

A

C. Alarming RU-2, ‘A’ Essential Cooling Water only.

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3
Q

Unit 1 is in Mode 6.
Core off-load is in progress.
The CRS is informed that a Fuel Assembly has been dropped in the Spent Fuel Pool.
The Fuel Assembly is being placed in a stable condition.
RU 31 is in alert alarm and readings are trending up.
RU 145 is in alert alarm and readings are trending up.
In addition to initiating a FBEVAS the crew is expected to…

A. Ensure all personnel have evacuated the area, no other actions are required.
B. Initiate or very initiated CRVIAS and ensure all personnel have evacuated the area.
C. Initiate or verify initiated CREFAS and ensure all non-essential personnel have evacuated the area.
D. Initiate or verify initiated CREFAS, CRVIAS and ensure all non-essential personnel have evacuated the area.

A

C. Initiate or verify initiated CREFAS and ensure all non-essential personnel have evacuated the area.

(Note: CREFAS should cross trip and non-essential personnel should be evacuated)

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4
Q

Unit 1 is operating at 100% power.
A waste gas system discharge is in progress.
RU-12 (Waste Gas Decay Tank Discharge) readings are stable.
RU-14 (Radwaste Building Ventilation Exhaust Filter Inlet) is in ALERT.
RU-15 (Waste Gas Area Combined Ventilation Exhaust) is in ALERT.
RU-143 (Plant Vent) readings are rising.
Which ONE of the following describes the event that is occurring?

A. Gas system discharge is exceeding limits, GRN-UV34A/B will auto CLOSE.
B. Gas system discharge is exceeding limits, GRN-UV34A/B will auto CLOSE.
C. Waste Gas Decay Tank Leak is in progress, GRN-UV34A/B will auto CLOSE.
D. Waste Gas Decay Tank Leak is in progress, GRN-UV34A/B will remain OPEN.

A

D. Waste Gas Decay Tank Leak is in progress, GRN-UV34A/B will remain OPEN.

(Note: RU-14/15 and RU-143 would be rising or in alarm for GR system leak. GRN-UV-34A/B auto close on RU-12 high alarm only)

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5
Q

Unit 1 is in Mode 6.
Fuel movement is in progress.
It is discovered that both channels of CREFAS (RU-29 and RU-30) are INOPERABLE.
Which of the following is the MINIMUM actions required to comply with Tech Spec 3.3.9, Control Room Essential Filtration Actuation Signal?

A. Immediately place one train of CREFS in operation OR suspend movement of irradiated fuel assemblies, positive reactivity additions and core alterations.
B. Immediately place one train of CREFS in operation AND suspend movement of irradiated fuel assemblies, positive reactivity addition and core alterations.
C. Within 1 hour place one train of CREFS in operation OR suspend movement of irradiated fuel assemblies, positive reactivity additions and core alterations.
D. Within 1 hour place one train of CREFS in operation AND suspend movement of irradiated fuel assemblies, positive reactivity addition and core alterations.

A

A. Immediately place one train of CREFS in operation OR suspend movement of irradiated fuel assemblies, positivity addition and core alterations.

(Note: Tech Spec 3.3.9 condition C states that the requirement during movement of irradiated fuel is to IMMEDIATELY either place a train of CREFAS in operation OR suspend movement of, positive reactivity additions and Core Alterations.)

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6
Q

Unit 1 operating at 100% power.
The core is at 250 EFPD.
A containment purge is in progress.
The reactor trips with indications of a large break LOCA.
A CIAS fails to actuate.
Core damage is indicated.
The Power Access Purge Area Monitors, SQA-RU-37 and SQB-RU-38 will sense rising ____ radiation levels.

A. Beta
B. Alpha
C. Gamma
D. Neutron

A

C. Gamma

(Note: The radiation levels sensed by this detector would be coming form inside the purge lines, gamma being the most penetrating.)

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7
Q

Unit 2 is in an outage.
Core Off load is in progress.
RU-37 (Power Access Purge Area Monitor Train A) is inoperable and in bypass on BOP-ESFAS.
Subsequently:
RU-38 (Power Access Purge Area Monitor Train B) power supply fuses blow.
Which ONE of the following predicts the expected plant response and appropriate actions?
CPIAS actuates and provides a cross trip to ____.
IF the CPIAS did not actuate properly the CRS must suspend ____.

A. (1) FBEVIAS
(2) movement of irradiated fuel assemblies in the fuel building per TRM 3.9.104 (FBEVAS).
B. (1) CREFAS
(2) movement of irradiated fuel assemblies in the fuel building per Tech Spec 3.3.0 (CREFAS).
C. (1) FBEVAS
(2) core alterations and movement of irradiated fuel assemblies in the CTMT per Tech Spec 3.3.8 (CPIAS)
D. (1) CREFAS
(2) core alterations and movement of irradiated fuel assemblies in the CTMT per Tech Spec 3.3.8 (CPIAS)

A

D. (1) CREFAS
(2) core alterations and movement of irradiated fuel assemblies in the CTMT per Tech Spec 3.3.8 (CPIAS)

(Note: A loss of power to the ARM will result in the BOP-ESFAS module sensing a trip and actuating the CPIAS module which result in a cross trip signal being sent to the CREFAS module. TS 3.3.8 directs suspending core alternations and movement of irradiated fuel in the CTMT immediately.)

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8
Q

Unit 1 has entered 40AO-9ZZ03, Loss of Cooling Water.
Essential Cooling Water train ‘A’ has been cross-tied to the Nuclear Cooling Water system.
An RCS leak into the Nuclear Cooling Water system now occurs.
The Process Radiation Monitoring system will respond by alarming…

A. RU-6, Nuclear Cooling Water, ONLY.
B. RU-2, ‘A’ Essential Cooling Water, ONLY.
C. RU-2, ‘A’ Essential Cooling Water, AND RU-6, Nuclear Cooling Water.
D. RU-2, ‘A’ Essential Cooling Water, ONLY and closing the EW-NC cross-tie valves.

A

B. RU-2, ‘A’. Essential Cooling Water, ONLY.

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9
Q

Unit 1 is operating at 100% power.
RU-31, Spent Fuel Pool Area, monitor exceeds the high trip set point.
The Fuel Building Normal Supply and Exhaust units Have stopped.
The Control Room Essential AHUs have started.
Which ONE of the following describes the response of the Fuel Building Essential Air Filtering Unit A and the Control Room Essential Air Handling Units Outside Air Intake Damper?

          FB ESS AFU A.              CR ESS AHUs OSA Damper A.               Started.                                     Open B.               Started.                                     Closed C.               Stopped.                                  Open D.               Stopped.                                   Closed
A

A. Started. Open

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10
Q

RU-37, Power Access Purge ‘A’, is in HIGH alarm.
RU-38, Power Access Purge ‘B’ is in HIGH alarm.
RU-34, Containment Building Refueling Purge, is in HIGH alarm.
74RM-9EF41, Radiation Monitoring System Alarm Response, requires the operator to verify CPIAS and CREFAS have actuated.
Which ONE of the following describes the reason for performing this action?

A. CREFAS and CPIAS both actuated off the RU-37/38 HIGH alarms.
B. CREFAS actuated off the HIGH alarms; CPIAS actuated off the cross trip.
C. CPIAS actuated off the HIGH alarms; CREFAS actuated off the cross trips.
D. CPIAS actuated off the RU-37/38 HIGH alarms; CREFAS actuated off the RU-34 HIGH alarm.

A

C. CPIAS actuated off the HIGH alarms; CREFAS actuated off the cross trips.

(Note: RU-37/38 actuate a CPIAS, CREFAS actuates off the cross trip)

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11
Q

Unit 1 is operating at 100% power.
The upper half of window 5B03A ‘LEG 1-3 CIAS LEG 2-4’ is alarming.
The CIAS annunciators on B05 is alarming.k
The RO reports that there are no abnormal trends in Containment parameters.
Which ONE of the following is the required action(s) per LCO 3.4.16, RCS Leakage Detection Instrumentation?

A. Both the Containment Sump and Atmosphere monitors are Inoperable. Enter LCO 3.0.3 immediately.
B. Only the Containment Sump monitor is Inoperable. Perform an RCS water Inventory balance once per 24 hours.
C. Only the Containment Atmosphere radioactivity monitor is Inoperable. Analyze grab samples of the containment atmosphere, once per 24 hours.
D. Both the Containment Sump and Atmosphere monitors are Inoperable. Be in Mode 3 within 6 hours and mode 5 within 36 hours, entry into LCO 3.0.3 is NOT required at this time.

A

A. Both the Containment Sump and Atmosphere monitors are Inoperable. Enter LCO 3.0.3 immediately.

(Note: with both the atmosphere and sump monitors inoperable enter LCO 3.0.3 immediately. When an ‘A’ train CIAS is actuated RU-1 is isolated and therefore Inoperable due 2 of 4 CI valves going closed, HCA-UV-45/46. On the ‘A’ train CIAS the containment sump isolation valve RDA-HV-23 will go closed making the containment sump monitoring system Inoperable.)

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12
Q

Unit 1 is operating at 100% power.
RU-8 (Auxiliary Building Ventilation Exhaust Filter Inlet) is in ALERT.
RU-9 (Auxiliary Building Lower Level Exhaust) is in ALERT.
RU-143 (Plant Vent) readings are rising.
All other radiation monitors read background.
Which of the following describes the event that is occurring?

A. Charging system leak.
B. Steam Generator Tube Leak.
C. Waste Gas Decay Tank Leak.
D. Letdown Heat Exchanger tube leak.

A

A. Charging system leak.

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13
Q

Which of the following monitors are considered part of the RCS Leakage Detection System in accordance with T.S. LCO 3.4.16, RCS Leakage Detection Instrumentation?

A. RU-16, Operating Level Area.
B. RU-17, Incore Instrument Area.
C. RU-1, Containment Atmosphere.
D. RU-149, High Range in Containment Area.

A

C. RU-1, Containment Atmosphere.

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14
Q

Unit 1 is operating in Mode 4 coming out of a refueling outage.
RU-1 (Containment Atmosphere) is declared inoperable.
Which ONE of the following describes the required action (if any) per Technical Specification 3.4.16 (RCS Leakage Detection Instrumentation)?

A. Perform RCS water inventory balance once per 72 hours.
B. Analyze grab samples of containment atmosphere once per 24 hours.
C. No action required as long as containment sump monitor remains operable.
D. No action required as long as RU-16 (Containment Operating Level) remains operable.

A

B. Analyze grab samples of containment atmosphere once per 24 hours.

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15
Q

Unit 1 is in Mode 6.
Core off-load is in progress.
LPSI Pump A is in service providing SDC flow at 4100 gpm.
LSRO reports that a fuel assembly has been dropped in the Refueling Pool.
Bubbles can be seen emerging from the dropped assembly.
Power Access Purge monitors, RU-37 and RU-38, are trending up.
Operating Level Area monitor, RU-16, is trending up.
The CRS is required to enter ____ and ensure ____.

A.  (1) 40EP-9EO11, LMFRP
      (2) CPIAS and CREFAS are initiated
B.  (1) 40EP-9EO11, LMFRP
      (2) an equal number of Auxiliary Building normal and exhaust fans are running.
C.  (1) 40AO-9ZZ22, Fuel Damage
      (2) CPIAS and CREFAS are initiated
D.  (1) 40AO-9ZZ22, Fuel Damage
      (2) an equal number of Auxiliary Building normal and exhaust fans are running.
A

C. (1) 40AO-9ZZ22, Fuel Damage

(2) CPIAS and CREFAS are initiated

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16
Q

A leak has occurred on a Waste Gas Decay Tank due to a crack in the tank wall.
The waste gas is escaping to outside atmosphere through the Plant Vent.
Before the waste gas exits through the Plant Vent, the waste gas will be monitored by Radiation Monitor ____ and will be filtered by ____.

A. 1. RU-12, Waste Gas Decay Tank Monitor
2. GRN-F01, Gaseous Discharge Filter
B. 1. RU-12, Waste Gas Decay Tank Monitor
2. HRN-J01A/B, Radwaste Building Normal AFUs
C. 1. RU-15, Waste Gas System Area Combine Ventilation Exhaust Monitor
2. GRN-F01, Gaseous Discharge Filter
D. 1. RU-15, Waste Gas System Area Combined Ventilation Exhaust Monitor
2. HRN-J01JA/B, Radwaste Building Normal AFUs

A

D. 1. RU-15, Waste Gas System Area Combined Ventilation Exhaust Monitor
2. HRN-J01JA/B, Radwaste Building Normal AFUs.

17
Q

An RMS alarm on ____, which monitor(s) eradication levels of the ____.
is (are) the primary RMS indication(s) of high reactor coolant activity and possible fuel failure.

A. 1. Containment High Range Area Monitors, RU-148/149
2. 100’ elevation inside Containment
B. 1. Containment High Range Area Monitors, RU-148/149
2. 140’ elevation inside Containment
C. 1. Reactor Coolant Letdown Line Radiation Monitor, RU-155D
2. Letdown line at the inlet of the Letdown Heat Exchanger
D. 1. Reactor Coolant Letdown Line Radiation Monitor, RU-155D
2. Letdown line between the Letdown Heat Exchanger and the Ion Exchangers

A

D. 1. Reactor Coolant Letdown Line Radiation Monitor, RU-155D
2. Letdown line between the Letdown Heat Exchanger and the Ion Exchangers

18
Q

Unit 2 is operating at 100% power, MOC.
A 200 gpm SGTR has just occurred on SG #1.
How will the Radiation Monitoring System (RMS) indications change in response to this event?
Radiation levels will begin to rise on RU-142, Main Steam Line N-16 Radiation Monitor, for ____ and then START to lower when ____.

A.  1.  SG #1 ONLY
      2. SG #1 is isolated
B.  1.  SG #1 ONLY
      2. The reactor is tripped.
C.  1.  SG #1 and SG #2
      2.  SG #1 is isolated
D.  1.  SG #1 and SG #2
      2.  The reactor is tripped.
A

D. 1. SG #1 and SG #2
2. The reactor is tripped.

(Note: Distractors are plausible if thought that only SG#1 N-16 RM would respond to a SGTR on SG #1, however the ‘SHINE’ from the SG #1 steam lines will be sensed on the SG #2 N-16 RM as well (approximately 1/2 the magnitude). Also plausible if thought that N-16 rad levels would rise until the MSIVs are closed (i.e. SG#1 Isolated))

19
Q

A Waste Gas Decay Tank release is required.
Gaseous Radwaste Radiation Monitor RU-12 has just failed off-scale high.
Which of the following describes the required action(s) in order to perform the release as planned?
In order for the release to be performed, ____ as required by ____.

A. 1. The valve galleries associated with the release path must be posted as a high radiation area
2. The Offsite Dose Calculation Manual
B. 1. At least two technically qualified personnel must independenlty verify the discharge valve lineup
2. The Offsite Dose Calculation Manual
C. 1. The valve galleries associated with the release path must be posted as a high radiation area
2. 74RM-9EF41, Radiation Monitoring System Alarm Response.
D. 1. At least two technically qualified personnel must independently verify the discharge valve line up.
2. 74RM-9EF41, Radiation Monitoring System Alarm Respoonse

A

B. 1. At least two technically qualified personnel must independently verify the discharge valve lineup
2. The Offsite Dose Calculation Manual

(Note: Distractors, First part is plausible since there is guidance in the alarm response procedure to evaluate changing the radiation postings in the event of a radiation monitor alarm, and since RU-12 has failed high, it would be reasonable to raise the postings as a conservative approach to ALARA. Second Part is plausible since the ARP provides contingency actions for alarming or failed RMs, however there are no requirements in the ARP related to gaseous releases.)

20
Q

A failure of both Nuclear Cooling Water pumps has occurred.
The Operating Crew has cross connected ‘A’ EW to NC from the Control Room.
A small leak into one of the High Pressure Seal Coolers occurs after the systems are cross connected.
Based on these conditions, how will RMS respond?

A. RU-155D (Letdown) alarm ONLY. Take actions per 40AO-9ZZ05, Loss of Letdown AOP.
B. RU-2 (ECW ‘A’) AND RU-6 (NCW) alarm. Take actions per 40AO-9ZZ03, Loss of Cooling water AOP.
C. RU-6 (NCW) and RU-155D (Letdown) alarm. Take actions per 40AO-9ZZ02, Excessive RCS leak rate AOP.
D. RU-2 (ECW ‘A’) alarm ONLY. Take actions per 74RM-9EF41, Radiation Monitoring System Alarm Response.

A

D. RU-2 (ECW ‘A’) alarm ONLY. Take actions per 74RM-9EF41, Radiation Monitoring System Alarm Response.

21
Q

Unit 1 is in Mode 6.
Refueling Purge is in operation.
Core alterations are in progress.
RU-38, Power Access Purge B monitor has failed high and been placed in Bypass.
Effluents Tech reports that RU-37, Power Access Purge A has failed a channel check and recommends that the monitor be declared Inoperable.
Which one of the following actions is required?

A. Containment must be evacuated.
B. Core alterations must be stopped.
C. RU-34, Containment Building Refueling Purge Monitor must be placed in service.
D. Both trains of Control Room Essential Ventilation Actuation System (CREVAS) must be placed in service)

A

B. Core alterations must be stopped.

(Note: LCO 3.9.3 requires that during core alterations containment penetrations must be operable this would include CPIAS closure of refueling purge valves).

Systems 11-13-19 (41 decks)

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