ML061720259
| ML061720259 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/22/2006 |
| From: | - No Known Affiliation |
| To: | Office of Nuclear Reactor Regulation |
| Conte R | |
| References | |
| Download: ML061720259 (4) | |
Text
Millstone Unit 2 Post Examination Review w/Students Remarks on Questions Question #
- 14
- I6
- I 7
- 20
- 25
- 33
- 35
- 4 1
- 44
- 55 Remarks on Questions by Student As To Why It Was Missed Marc thought that an ATWS would cause AFW to start to maintain a heat sink.
Soiiiewhat thrown off bv automatic actions in auestioii stem.
Marc didnt think about INV-6.
hitially picked C changed to D. Not certain 011 where volts aiid amps are read.
With a battery isolated, battery voltage should lower (below 134 volts).
Discounted -5 amps. Did not see any acceptable answer.
Marc assumed TCV would open to lower RBCCW temperature. Didnt account for the stable RM.
Unfamiliarity with procedure. Defaulted to most conservative answer.
Missed Wide range as power range.
Assumed a CTMT RM would see evidence of fueI failure.
Assumed PZR pressure would be above RCS saturation pressure while drawing a bub h 1 e.
Wasnt sure of switch position in this condition.
Couldnt remember value. Either C or D.
Didnt Imow there were two suction pressure instruments.
Just didnt know.
Millstone Unit 2 Examination Student Questions and Proctor Answers Questions listed in the order that they were asked Question #
- 56
- 12
- 12
- 2 1
- 30
- 69
- 3
- 5 Student Question Is SP-260 ID current?
Choice D - Is manual control of#2 Regulator Valve as RO on C05 or Direct PEO to take local control?
Are these the only actions to be taken or just a pai-t of the actions to be taken?
What is the time frame that SUSPENDED encompasses? Is it Teiiiporary or Long Term?
Ts chemist still doing what he is doing?
Gramatically, choice C does not make sense.
Can the word on be removed without clianging the intent?
What is inoinents ago mean? How long ago?
Ouantifv the time man?
In choice B, what does loss of mean?
I believe there is no correct question to this question.
I h 1 choosing B because it is closet to the correct answer. However, with the words loss of RCS flow, it is not correct because 3 RCPs are still running and you have not totally lost flow, it is only degraded.
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Proctor Answer Yes.
Unless otherwise stated actions are taken in the Control Room.
The actions stated are those actions for that svsteni.
Temporary.
Assume all conditions still exist as stated.
Yes.
Assume a couple of minutes ago.
Loss of pertains specifically to the actions taken in the stem.
The only response given to the student was to hold, skip the question, until the Lead Examiner could be consulted.
The words loss of in choice B pertains to the generic concept of degraded RCS flow and its effect on the reactor core.
However, the trip 017 low RCS ilow is designed to occur on degraded RCS flow, which is what the stein is soliciting.
13 8 1
k3 8
- Per Lead Examiner, reword B to remove words either loss If or7 based on candidates liallenge of wording during xam.
lefine not operated - does not mean not 1 perated period?
loes everything else work?
3efine Long Term
- 3 1 tes, assume only items iientioned in stem dont work.
hudent stated so CAR fans are
)perating.
fes, not operated period.
Student stated that there was 110
- orrect answer based on the question soliciting the effect of io CTMT spray flow, a large x-eak LOCA and all 4 CAR fans still operating. He did not know what the question was trying to solicit and was choosing D because it was the least wrong choice.
Based on discussion with the Lead Examiiier, it was agreed that the question was potentially flawed in its wording.
However, it was felt that any fui-tlier guidance beyond quantifying Long term would provide the student$with too much guidance.
sfaa/flb Long Teriii nieans > 8 hrs.
~
Per the Lead Examiner consistent with nieans adequate for.
c NOTE: Time expired at 1410 (6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> after starting). The student asked for more time arid the Lead Examiner was consulted by phone. Per the Lead
&-sed Examiners direction, the student was given till 1430 to complete the exam.