ML16262A036
| ML16262A036 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 07/18/2016 |
| From: | Vincent Gaddy Operations Branch IV |
| To: | Luminant Power |
| References | |
| 50-445/16-07, 50-446/16-07 50-445/OL-16, 50-446/OL-16 | |
| Download: ML16262A036 (36) | |
Text
CP-2016-07 Post-Exam Analysis CPNPP 2016 NRC WRITTEN EXAM RESULTS 1-75 RO / 75-100 SRO Only VALUE: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Date: 7/18/16 KEY ANSWERS: C B C A B A D D C C D A D A B C C D A B B D A D A D C C B C A C B B B D D B A B D A A A B A C C/D D A Name TOTAL% PTS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Applicant 1 87.8 65.0 D C C C C B Applicant 2 85.1 63.0 A A D C D D B C Applicant 3 81.1 60.0 C B A A B C B B B Applicant 4 88.9 88.0 A C D C B Applicant 5 82.8 82.0 B A B A C C C A Applicant 6 83.8 83.0 C B A D A C D B D Total Missed 1 5 3 3 1 3 1 1 1 1 1 2 1 5 3 1 1 2 4 1 1 2 1 VALUE: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 KEY ANSWERS: A B C C D D B A B D D D B C A B C C C B C D B/D A C C D A C A B A C B C B C D A D A D B C B A B D A C Name SRO % RO % 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 Applicant 1 87.8 B D C Applicant 2 85.1 D D C Applicant 3 81.1 B A B B A Applicant 4 84.0 90.5 B A D C B C Applicant 5 72.0 86.5 A A A C A B C A C Applicant 6 88.0 82.4 B A A D C B C Total Missed 1 2 1 2 1 3 1 4 2 1 1 1 1 1 1 2 3 3 1 1 SRO Total Points = 99 5 - Applicants familiar with the vacuum fill rig were used to operating the local valves at the vacuum fill rig (also allowed per procedure for normal starting and stopping) and were unaware OF the note that service air could be isolated to containment.
RO Only Points = 74 6 - Applicants had difficulty recalling the operation and flowpath of the Pressurizer vent valves. This weakness is understandable as these valves are seldom operated in the simulator or plant.
SRO Only Points = 25 11 - Applicants had difficulty recalling proper steam dump operation and feedwater isolation logic. Applicants quickly understood errors when correct response was described. No generic weakness identified.
15 - Applicants could not recall which valves were the normally closed valves (AOVs vs. MOVs). CR-2016-006876 RO Questions Average = 85.6 31 - Applicants were confused by the terms 'turbine load changes' vice 'turbine load reject'. Question will be revised prior to inclusion in CPNPP Bank to specify 'load reject'.
SRO Questions Average = 81.3 33 - Applicants failed to recognize that question was asking about the 'unaffected' SGs.
37 - Applicants answered based on 'Control Bank' DRPI ROD DEV vs 'Shutdown Bank'. Applicants immediately recognized error during review. No generic weakness identified.
Class Average = 84.9 43 - Valve nomenclature in question led to confusion as applicants were unable to ascertain which train was affected. Question removed from exam. CR-2016-006876 NOTE: NRC resolution was to not accept facility's recommendation. No post-exam changes were made to this question.
48 - Applicants were aware of the general reason for DC load shedding but did not appear to be able to identify the specific cause for additional load shedding below 110 volts. CR-2016-006876 NOTE: NRC resolution was to not accept facility's recommendation.
No post-exam changes were made to this question.
63 - Applicants were unable to recall specific criteria for natural circulation with steam voids, with RVLIS and letdown in service. Differences between EOS-0.3 and EOS-0.4 were discussed in detail during exam review and all applicants had a solid understanding.
64 - One applicant was confused by the reason of 'to minimize personnel radiation exposure' which is a long term objective as the procedural action could actually increase personnel exposure during the near term. An exam feedback was dispositioned to removed confusion prior to adding question to exam bank.
66 - Applicants did not believe that administrative requirements as detailed in K/A G.2.1.15 were required knowledge. CR-2016-006876 73 - Question was not specific enough in use of the term 'may' to eliminate Distractor D and thus was revised to accept both 'B' and 'D' as correct. Revise question prior to addition to bank. NOTE: NRC resolution was to not accept facility's recommendation.
No post-exam changes were made to this question.
78 - Question stem was ambigous to the effect that the MSLB had on the SG levels. The amount of time that blowdown occurred and whether adverse containment existed. Applicant was unable to determine that an adequate heat sink existed based on SG level and defaulted to the value for ensuring a heat sink. Question revision required prior to inclusion in bank.
79 - Question stem included parameter trend which required the correct answer be changed from D to C based on RCS pressure not being stable or increasing. NOTE: NRC resolution was to not accept facility's recommendation. Question was deleted from exam.
90 - Applicant knowledge of TS 3.1.6 Bases was deficient. CR-2016-006876 91 - Applicant knowledge of TS 3.3.3 Bases was deficient. CR-2016-006876 96 - Operability Assessment was scheduled to be taught in Post-License Training and was therefore not reviewed by applicants. CR-2016-006876 1 of 1
Question 43 Problem: During the written examination review of the CPNPP 2016 NRC exam it was identified that Question 43 lacks the necessary information in the stem in accordance with NUREG-1021 to determine the correct answer.
- The correct answer as approved on the worksheet and answer key is A
- Answer A is a specific Train A valve manipulated in the field in accordance with ABN-502, 1CC-0021, CCW SRG TK 1-01 TRN A OUT VLV
- Based on the information provided in the stem the applicants were unable to ascertain which train was the affected train. This resulted in all applicants incorrectly determining that Train B was the affected train based on the valve numbers being even numbers.
- The Train A valves, which are designated as Train A in the procedure, do not have Train A in the valve nomenclature provided in the stem.
- The originally validated question, prior to proposed exam submittal, did NOT include a picture and provided ONLY that the CCW Surge Tank Train A HI-HI/LO alarm was LIT.
However, upon revision of the question a picture was inserted that indicated both the Train A AND Train B CCW Surge Tank HI-HI/LO Alarms were LIT, which is correct for the malfunction in progress. With both of these alarms LIT, it is not reasonable to believe that an applicant can determine which Train is the affected Train based on valves that are operated in the Control Room that have no indication in the nomenclature of which Train they belong to.
- Every applicant chose the distractor that would have been the correct answer if the affected Train were Train B, which is Distractor C. Based on applicant selection, CPNPP believes that the applicants selections on the exam DO NOT display a knowledge weakness but that the question is lacking the necessary information for the applicants to make the correct decision.
Page 1 of 7CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #43_REV 4.DOCX3
Operations Management (Director, Nuclear Operations and Shift Operations Manager) agrees that it is NOT reasonable to expect a licensed operator to have valve numbers memorized to the extent that they would know what train the valve belongs to from sight on a written exam.
Furthermore, when operating the valve from the Control Board the specific valves in question are delineated via a mimic as to their proper train. The power supplies indicating their train are also located below the hand switch on the control board with an orange background indicating they are Train A valves (see above).
Therefore, CPNPP believes that Question 43 lacks the information necessary for the applicants to recall from memory which valve needs to be closed in order to isolate the given leak in the CCW system.
Solution: CPNPP recommends removing the question from the Reactor Operator written examination. Without adequate information in the stem it is not reasonable to expect the applicants to successfully answer the question.
NUREG-1021 justification: The proposed revision is in agreement with NUREG-1021 Rev. 10 ES-403.D.1.b 1st bullet which states a question with an unclear stem that confused the applicants or did not provide all the necessary information. As well as Appendix B paragraph C.1.e which states, Avoid questions that are unnecessarily difficult or irrelevant.
Page 2 of 7CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #43_REV 4.DOCX3
Examination Outline Cross-reference: Level RO SRO Revision: 4 Tier 1 Group 1 K/A 026 AA2.03 Importance Rating 2.6 Loss of Component Cooling Water: Ability to determine and interpret the following as they apply to the Loss of Component Cooling Water: The valve lineups necessary to restart the CCWS while bypassing the portions of the system causing the abnormal condition Question # 43 The above Unit 1, LIT alarms were received and subsequently
- 1-HS-4512, SFGD LOOP CCW RET VLV and 1-HS-4514, SGFD LOOP CCW SPLY VLV were closed on affected train
- The leakage was NOT stopped Per ABN-502, Component Cooling Water System Malfunction, what additional valve must be closed to isolate affected train and restore normal operation in unaffected train?
A. 1CC-0021, CCW SRG TK 1-01 TRN A OUT VLV B. 1CC-0023, CCW PUMP 1-01 SUCT ISOL VLV C. 1CC-0071, CCW SRG TK 1-01 TRN B OUT VLV D. 1CC-0067, CCW PUMP 1-02 SUCT ISOL VLV Answer: A Answer A is correct, but the question is removed from the exam.
Page 3 of 7CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #43_REV 4.DOCX3
K/A Match:
The question matches the K/A as it requires the operator to demonstrate procedural knowledge on how to position valves to isolate the leaking train from the non-leaking train so that operation can continue with the unaffected train.
Explanation:
A. Correct. Per ABN-502, the affected train surge tank outlet valve must also be closed in order to allow the surge tank to be refilled for the operating train.
B. Incorrect. Plausible as this is the manual pump suction valve. This valve is plausible if thought that the Train is isolated with the exception of the small portion of the system from the surge tank to the suction of the pump. However, this isolation would not isolate the section of piping from the surge tank to the suction piping which may be the location of the leak. Further, the procedure does not call out for this valve to be isolated as it does the surge tank isolation valve.
C. Incorrect. Plausible as this is the same valve as the correct Train A valve for Train B. The applicant must recognize the configuration and determine the train which must be isolated.
D. Incorrect. Plausible for Train B as described in B above for the affected Train A.
Technical Reference(s) ABN-502, Attached w/ Revision # See M1-0229-A Comments / Reference M1-0229-B CCW Study Guide Proposed references to be provided during None examination:
Learning ANALYZE the response to Leakage Out of the CCW System in accordance with Objective: ABN-502, Component Cooling Water System Malfunction.
(LO21ABN501OB106)
Question Source: Bank #
Modified Bank # (Note changes or attach parent)
New X Question History: Last NRC Exam Question Cognitive Level: Memory or Fundamental Knowledge Comprehension or Analysis X Level of Difficulty 5 10 CFR Part 55 Content: 55.41 4 55.43 Page 4 of 7CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #43_REV 4.DOCX3
Comments /
Reference:
ABN-502 Revision: 6 PCN: 17 Page 5 of 7CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #43_REV 4.DOCX3
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Reference:
M1-0229-A Revision: CP-21 Comments /
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M1-0229-B Revision: CP-25 Page 6 of 7CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #43_REV 4.DOCX3
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Reference:
CCW Study Guide Revision: 5/1/2011 Surge Tank There is one surge tank per unit located in the Auxiliary Building at the 873' level. This is approximately 73 feet higher than the pump to provide approximately 34 psig of available NPSH. The tank volume is approximately 4600 gallons, operates at atmospheric pressure and is vented to the Safeguards Building Ventilation System exhaust duct. The surge tank acts as a high point to fill and vent the system, provides a thermal expansion volume, provides a means to prevent overpressure of the system due to in-leakage from the Reactor Coolant System, and is also a collection volume for leakage into the system from various components.
The surge tank is divided into two individual compartments by a partition plate to provide a separate surge volume for each train. Each compartment is sufficient for its respective train. The partition plate extends to within 6 inches of the top of the tank with a six-inch high by thirty six-inch wide opening cut in the partition. Above the bottom of this opening, the surge tank will act as one volume with the trains separated below the opening. The bottom of this opening is at 58% level in the Unit 1 surge tank and 37 % level for the Unit 2 surge tank, creating a unit difference. The partition is designed to maintain its integrity with one side of the surge tank empty.
Each compartment of the surge tank is equipped with a local reading level gauge glass which is normally isolated. There is also a level transmitter for each compartment, u-LT-4500 for train A and u-LT-4501 for train B. These level transmitters actuate the Low-Low and Empty alarms, provide a signal for the indication in the control room, and initiate automatic actions. There are two additional level switches on each compartment that actuate the Hi-Hi/Low alarms only. These are u-LS-4502A and B for train A and u-LS-4503A and B for train B.
An alarm is generated in the control room at a low level setpoint (65% for Unit 1 and 46% for Unit 2, see figure 6), to alert the operator of the need for makeup. The operator will open the compartment makeup valve and the Reactor Makeup Water System (RMUW) isolation to begin makeup. Normal makeup is from RMUW due to the lower oxygen content of the water. If RMUW is not available, makeup may be from the Demineralized Water System (DWS), but RMUW is the preferred source.
If level continues to decrease, makeup will be automatically initiated at the low-low level setpoint, (63% for Unit 1 and 39% for Unit 2). This signal also causes the compartment isolation valve and the RMUW isolation valve to automatically open.
When level is restored to the Hi level setpoint (77% for Unit 1 and 65% for Unit 2), the compartment isolation valve receives a signal to close. The RMUW isolation valve will remain open until closed by the operator. If level continues to increase, a Hi-Hi level alarm is generated at 88% on Unit 1 and 75%
on Unit 2.
If the level in the surge tank reaches the empty setpoint (57% on Unit 1 and 33% on Unit 2), an empty alarm is generated. The empty setpoint will also send a signal to close the safeguards loop isolation valves for the train with the empty alarm. If the signal was generated by the running train, this will isolate flow to the other safeguards train and the non-safeguards loop.
Page 7 of 7CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #43_REV 4.DOCX3
Question 48 Problem: During the written examination review of the CPNPP 2016 NRC exam it was identified that Question 48 lacks sufficient detail in accordance with NUREG-1021 to eliminate a distractor as a correct answer. In particular:
- The correct answer as approved on the worksheet and answer key is D.
- Answer C is a statement which is true during initial load shedding of Attachment 2.A, it specifically states: plant monitoring and control until AC power restored
- However, based on information from the bases of ECA-0.0A for all Attachment 2s (including Attachments 2.A, 2.B, 2.C, and 2.D) which states, These attachments provide instructions for shedding of DC safeguards bus loads in order to conserve capacity to assist in future actions to restore AC power, while maintaining that minimum instrumentation necessary to monitor plant conditions., the applicants were unable to discern whether answer D was a specific subset of answer C
- Therefore, the applicants were unable to eliminate answer C as an incorrect answer.
Therefore, CPNPP ascertains that Question 48 answer D and distractor C should both be accepted as correct answers.
The first part of answer D and distractor C was reviewed and deemed to be accurate, thus making both C and D correct answers.
Solution: CPNPP recommends accepting distractor C and answer D as correct answers.
With the inability of the applicants to eliminate distractor C as it appears to include the specific subset called out in answer D it is not reasonable to expect the applicants to successfully eliminate distractor C as a possible answer to the question.
NUREG-1021 justification: The proposed revision is in agreement with NUREG-1021 Rev. 10 ES-403 D.1.c which states, If it is determined that there are two correct answers, both answers will be accepted as correct.
Page 1 of 8CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #48_REV 4.DOCX
Examination Outline Cross-reference: Level RO SRO Revision: 4 Tier 1 Group 1 K/A 055 EA2.04 Importance Rating 3.7 Station Blackout: Ability to determine or interpret the following as they apply to a Station Blackout: Instruments and controls operable with only dc battery power available.
Question # 48 During a Station Blackout additional load shedding is performed when safeguards battery voltage is less than 110 volts to allow for ___________________ and ________________.
A. battery charger restoration with portable generator plant monitoring and control until AC power restored B. battery charger restoration with portable generator Safeguards Bus supply breaker closure C. Diesel Generator field flashing plant monitoring and control until AC power restored D. Diesel Generator field flashing Safeguards Bus supply breaker closure Answer: C/D Accept both C/D as correct answers on the exam.
Page 2 of 8CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #48_REV 4.DOCX
K/A Match:
The question matches the K/A as it requires the applicant to demonstrate knowledge of actions necessary regarding DC power supplies in order to operate controls to reestablish safeguards AC power.
Explanation:
A. Incorrect. Plausible because Attachments 2.A and 2.B when performed ensure sufficient time to restore battery chargers using a portable generator, however this is not what is accomplished by Attachment 2.C. The second part is correct (See C below).
B. Incorrect. First part is incorrect but plausible (See A above). Second part is correct (See D below).
C. Correct. First part is correct (See D below). The second part is correct because load shedding does provide for plant monitoring and control until AC power is restored per the bases for Attachment 2.
D. Correct. If battery voltage lowers to less than 110 volts the associated bus is further load shed to ensure adequate voltage remains for flashing the diesel generator field or closing safeguards bus supply breakers for power restoration.
Technical Reference(s) DC Electrical Study Guide Attached w/ Revision # See ECA-0.0A Comments / Reference Proposed references to be provided during examination: None Learning Objective: Given a procedural step, or sequence of steps from ECA-0.0, STATE the purpose/basis for the step(s). (LO21ERGC00OB105)
Question Source: Bank #
Modified Bank # (Note changes or attach parent)
New X Question History: Last NRC Exam Question Cognitive Level: Memory or Fundamental Knowledge X Comprehension or Analysis Level of Difficulty 3 10 CFR Part 55 Content: 55.41 10 55.43 Page 3 of 8CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #48_REV 4.DOCX
Comments /
Reference:
DC Electrical Study Guide Revision: 5-5-2011 ECA-0.0, Loss of All AC While dealing with the effects of a loss of All AC power, the operators will initiate shedding of unnecessary DC loads per Attachment 2 of ECA 0.0. They also shift the common XED1 & 2 panels to the other unit, which should have diesel power available. The DC system is designed to supply all required loads for at least four hours following a loss of AC power. We shed unnecessary loads in order to conserve battery capacity and to extend the time the batteries can function.
Following the load shedding, the DC bus voltages are monitored. The minimum 125 VDC system voltage required for equipment operation is approximately 105 volts. When uED1 or uED2 bus voltage drops to 110 volts additional loads may be shed per Attachment 2. This is done in order to conserve the ability to flash the EDG field if the EDG becomes available. It also ensures breaker control power for AC system alignments when an AC source has been restored.
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ECA-0.0A Revision: 9 Page 4 of 8CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #48_REV 4.DOCX
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ECA-0.0A Revision: 9 Page 7 of 8CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #48_REV 4.DOCX
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ECA-0.0A Revision: 9 Comments /
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ECA-0.0A Revision: 9 Page 8 of 8CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #48_REV 4.DOCX
Question 73 Problem: During the written examination review of the CPNPP 2016 NRC exam it was identified that Question 73 lacks sufficient detail in accordance with NUREG-1021 to discriminate between the approved answer and one of the distractors. In particular:
- The correct answer as approved on the worksheet and answer key is B.
- Answer B is a specifically delineated responsibility of the Relief Reactor Operator in accordance with ODA-102, specifically, Operate the common system equipment as directed.
- In contrast, distractor D stated, keep the OSC Manager informed of NEO activities
- The action in distractor D is considered incorrect as it was an action assigned to the Field Support Supervisor per ODA-102. However, the stem states the Field Support Supervisor position is NOT filled
- Therefore, the applicants were unable to discriminate this action as being incorrect in that the duties and responsibilities of the Relief Reactor Operator also includes, Assist the Emergency Coordinator. Assist the Emergency Coordinator duty is further justified as being included in the discrimination process by the use of the word may in the second fill in the blank statement.
- Based on this lack of discrimination in what the Relief Reactor Operator can and cannot do in assisting the Emergency Coordinator, keeping the OSC Manager informed of NEO activities could not be ruled out as incorrect.
Therefore, CPNPP ascertains that Question 73 answer B and distractor D should both be accepted as correct answers.
The first part of answer B and distractor D were reviewed and deemed to be accurate, thus making B and D correct.
Solution: CPNPP recommends accepting answer B and distractor D as correct answers. With the inability of the applicants to eliminate distractor D as it is inclusive of Assist the Emergency Coordinator it is not reasonable to expect the applicants to successfully eliminate distractor D as a possible answer to the question.
NUREG-1021 justification: The proposed revision is in agreement with NUREG-1021 Rev. 10 ES-403 D.1.c which states, If it is determined that there are two correct answers, both answers will be accepted as correct.
Page 1 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
Examination Outline Cross-reference: Level RO SRO Revision: 4 Tier 3 Group K/A G.2.4.39 Importance Rating 3.9 Knowledge of RO responsibilities in emergency plan implementation.
Question # 73
- Crew composition:
- Shift Manager
- 3 other Senior Reactor Operators
- Field Support Supervisor position is NOT filled
- 5 Reactor Operators
- 8 Nuclear Equipment Operators
- Non Operations Staffing is at MINIMUM Shift Crew Composition
- An ALERT has been declared on Unit 1
- After initial notifications were completed, NRC requested ENS line be manned by a dedicated individual Per ODA-102, Conduct of Operations ______________________ should be assigned to the ENS line, and that individual may also __________________________.
A. Unit 2 Balance of Plant Operator operate common system equipment B. Relief Reactor Operator operate common system equipment C. Unit 2 Balance of Plant Operator keep OSC Manager informed of NEO activities D. Relief Reactor Operator keep OSC Manager informed of NEO activities Answer: B Accept both B/D as correct answers on the exam.
Page 2 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
K/A Match:
The question is a K/A match as it requires the applicant to determine which Reactor Operator has specific duties during implementation of the Emergency Plan.
Explanation:
A. Incorrect. The first part is incorrect but plausible as ODA-102, states that the BOP on the unaffected unit is to perform the duties of the Relief Reactor Operator if the Relief Reactor Operator is unavailable. Knowledge of minimum shift staffing shows that the Relief Reactor Operator position is available. The second part is correct as described in B below.
B. Correct. In accordance with ODA-102, the Relief Reactor Operator should be assigned these duties as the SROs are at minimum crew staffing and cannot be assigned to the ENS.
ODA-102, lists other responsibilities that the Relief Reactor Operator can be asked to do during emergencies and states that they may operate the common equipment as directed.
C. Incorrect. The first part is incorrect but plausible as described in A above. The second part is incorrect but plausible as described in D below.
D. Correct. The first part is correct as described in B above. The second part is correct as the Field Support Supervisor (FSS) position is unmanned; the Relief Reactor Operator (RRO) could assume the duty of keeping the OSC Manager informed of NEO activities in lieu of the FSS since one of the RROs duties is to Assist the Emergency Coordinator.
Technical Reference(s) ODA-102 Attached w/ Revision #
See Comments /
EPP-116 Reference Proposed references to be provided during examination:
Learning RESPOND to plant emergencies in accordance with station procedures, Objective: including deviation from Technical Specifications and normal recovery methods when required, and EVALUATE plant and personnel response to emergencies. (OPD1.ADM.XA1.OB21)
Question Source: Bank #
Modified Bank # (Note changes or attach parent)
New X Question History: Last NRC Exam Question Cognitive Memory or Fundamental Knowledge X Level:
Page 3 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
Comprehension or Analysis Level of Difficulty 3 10 CFR Part 55 55.41 10 Content:
55.43 Page 4 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
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ODA-102 Revision: 27 PCN 2 Page 5 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
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ODA-102 Revision: 27 PCN 2 Page 6 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
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EPP-116 Revision: 9 Page 11 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
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EPP-116 Revision: 9 Page 12 of 12CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #73_REV 4.DOCX3
Question 79 Problem: During the written examination review of the CPNPP 2016 NRC exam it was identified that Question 79 lacks sufficient detail in accordance with NUREG-1021 to obtain the answer previously approved as correct. In particular:
- The correct answer as approved on the worksheet and answer key is D.
- Answer D included a transition to EOS-1.1B, Safety Injection Termination vice a transition to EOP-1.0B, Loss of Reactor or Secondary Coolant.
- In accordance with EOP-2.0B, Step 8, in order for the transition to be made to EOS-1.1B, the RCS pressure is required to be Stable or Increasing.
- In contrast with the above statement, the stem of Question 79 states that RCS pressure is 2240 psig and decreasing
- The provided justification for the original answer was that this was indication following the opening of a PORV on high RCS pressure; however, no other information was included in the stem which indicated that a PORV had opened. In particular, the inclusion of Tailpipe outlet temperature, PORV position indication, PORV Not Closed alarm or PRT parameters would have been required to determine that a PORV had indeed opened.
- During the exam review it was determined that two of the three SRO applicants had interpreted the indication as the existence of a possible steam space leak or other anomaly which would have resulted in decreasing pressure with increasing pressurizer level. Based on this interpretation, the selection of a transition to EOP-1.0B is correct.
Therefore, CPNPP ascertains that Question 79 has information in the stem that indicates the correct answer is distractor C [based on RCS pressure is 2240 psig and decreasing] vice answer D therefore it is not reasonable to expect the applicants to eliminate distractor C as the correct answer and it is reasonable to expect the applicants to eliminate answer D as a correct answer.
The first part of distractor C was reviewed and deemed to be accurate, thus making distractor C correct.
Solution: CPNPP recommends accepting distractor C as the correct answer and not accepting answer D as a correct answer.
NUREG-1021 justification: The proposed revision is in agreement with NUREG-1021 Rev. 10 ES-403 D.1.b 1st bullet which states a question with an unclear stem that confused the applicants or did not provide all the necessary information.
Page 1 of 6CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #79_REV 5.DOCX
Examination Outline Cross-reference: Level RO SRO Revision: 5 Tier 1 Group 1 K/A 040 AA2.05 Importance Rating 4.5 Steam Line Rupture: Ability to determine and interpret the following as they apply to the Steam Line Rupture: When ESFAS systems may be secured Question # 79
- Unit 2 Steam Line Break OUTSIDE containment
- Fault occurred on 2ST, STATION SERVICE TRANSFORMER 2ST
- 2EA2, Safeguards 6.9KV received 86-1 lockout when Reactor tripped
- EOP-2.0B, Faulted Steam Generator Isolation, Step 8 Check if ECCS Flow Should be Reduced in progress with the following parameters:
- SG 2-01 NR level 0%
- All other SG NR levels 5% to 8% and increasing
- AFW total flow 470 gpm and stable
- RCS subcooling 52°F and stable
- RCS pressure 2240 psig and decreasing
- Pressurizer Level 70% and increasing TDAFWP ________ be placed in Pull Out.
Unit Supervisor has announced transition to _________________________.
A. should EOP-1.0B, Loss of Reactor or Secondary Coolant B. should EOS-1.1B, Safety Injection Termination C. should NOT EOP-1.0B, Loss of Reactor or Secondary Coolant D. should NOT EOS-1.1B, Safety Injection Termination Answer: C Changed answer from D to C on written exam.
Page 2 of 6CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #79_REV 5.DOCX
K/A Match:
The question matches the K/A as it requires the applicant to determine and interpret the plant indications concerning whether ESFAS systems (ECCS) can be secured.
SRO Only:
The question is SRO only in that it requires the applicant to exhibit SRO level knowledge of the ERG beyond the overall mitigative strategies and requires the SRO to make a procedure choice beyond the major EOPs.
Explanation:
A. Incorrect. First part is incorrect but plausible (See B below). Second part is correct (See C below).
B. Incorrect. First part is incorrect but plausible if the applicant does not recognize that 2 of the 3 intact SGs are being fed by the TDAFWP even though a single MDAFWP can supply greater than the minimum 460 gpm for heat sink maintenance. Second part is incorrect (See D below).
C. Correct. First part is correct (See D below). Second part is correct as with the indicated conditions of RCS pressure decreasing continuing on to Step 9 of EOP-2.0B is required and a transition to EOP-1.0B is required.
D. Incorrect. First part is correct as the TDAFWP is feeding 2 of the 3 intact SGs and should not be secured. Second part is incorrect as SI termination criteria per EOP-2.0B are NOT met as RCS pressure is decreasing with no indication that a Pressurizer PORV has lifted causing the pressure to lower.
Technical Reference(s) EOP-2.0B Attached w/ Revision # See EOP-0.0B Comments / Reference Proposed references to be provided during examination: None Learning Objective: IDENTIFY the proper transitions out of EOP-2.0. (LO21ERGE2AOB106)
Question Source: Bank #
Modified Bank # (Note changes or attach parent)
New X Question History: Last NRC Exam Question Cognitive Level: Memory or Fundamental Knowledge Comprehension or Analysis X Level of Difficulty 3 10 CFR Part 55 Content: 55.41 55.43 5 Page 3 of 6CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #79_REV 5.DOCX
Comments /
Reference:
EOP-2.0A Revision: 9 Comments /
Reference:
EOP-2.0B Revision: 9 Page 4 of 6CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #79_REV 5.DOCX
Page 5 of 6CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #79_REV 5.DOCX Comments /
Reference:
EOP-0.0B Foldout Page Revision: 9 PCN 1 Page 6 of 6CPNPP 2016 NRC WRITTEN EXAM FEEDBACK QUESTION #79_REV 5.DOCX