ML20214J588

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Forwards Comments Re 860715 Senior Reactor Operator Exam. Test Well Written & Key Accurate.Section 5 Questions Good But Took Too Long to Complete
ML20214J588
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 07/16/1986
From: Perks W
ARKANSAS POWER & LIGHT CO.
To: Mccrory S
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20214J575 List:
References
ANO-86-2-00693, ANO-86-2-693, NUDOCS 8608150087
Download: ML20214J588 (4)


Text

Attachment 1 ARKANSAS POWER & LIGHT COMPANY Arkansas Nuclear One P. O. Box 608 Russellville, Arkansas 72801 ANO-86-2-00693 Mr. Steve McCrory U.S. Nuclear Regulatory Commission Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, TX 76011

SUBJECT:

Arkansas Nuclear One - Unit 2 Docket No. 50-368 License No. NPF-6 Comments on NRC SR0 Exam of July 15, 1986

Dear Mr. McCrory:

I have attached my comments on the SR0 examination for your review and consideration. I thought that the test was well written and the key was l

for the most part accurate.

The only general comment I have is that although I felt the questions included in section 5 were very good, the section took too long to complete!

I would like to express my appreciation for your efforts in providing us with a good wrftten examination. If you have any comments, please contact I

me.

Very truly yours, i Walt Perks l Unit 2 Operations Supervisor l

WP: rab Attachment cc: ANO-DCC Dan R. Howard 8608150087 860008 PDR ADOCK 05000368 V PDR MEMBEA MIDOLE SOUTH UTILITIES SYSTEM l --. .-, - - - - - - -

ERC860484 07/16/86 5.01 Axial and Radial flux redistributions will also cause changes in CEA worth. Similar to key response 5 and 6.

5.02 a) New rod position 75" i 10"

[75 i 10]" - 10" = _l 65 i 10" l Rod motion b) Assume BOL p = .0062 Assume EOLS = .0052 p= S p = S 1 + AT 1 + AT -

= .0062 = .0052 1 + .08(26) 1 + .08(26) p= .2% .03% p = .169% i .03 final insertion final insertion worth .03 .15%p worth .05 .17%p final rod position 110-145" final rod position 105 - 140" additional rod motion 25 - 80" additional rod motion 20-75" c) SDBCS will maintain Tavg ~ 545*F, so no moderator temperature increase. With only a fuel temperature increase Doppler defect must be used.

BOL/MOL Doppler defect EOL Doppler defect 1.02 1.12 i Doppler coefficient l

1.02%p/100% Power or 1.12%p/100% Power j

= .0102%p/% Power or .0112%p/% Power Therefore, Final temperature = 545 Final pressure = 2250 l

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[

ATTACanZNT TO ANO-86-2-00693

. ERC860484 07/16/86 BOL/MOL DOPPLER EOL DOPPLER

.2 % p calculated in (S) for .169%p calcuated in (S)

.0102% p/% Power BOL .0112%p/% Power for EOL

= 19.6% power = 15.1% power range 17 to 22% power range of 13 to 18% power This was an excellent questions, but working was difficult using given data:

1) A BOL Boron concentration
2) An EOL EFPD
3) A MOL Rod Worth Curve 5.04 Should accept 185 i 10.

5.06 Should accept top region of core (2/3 to top)

Reason - should accept because this is the region of minimum CHF and MAX AHF.

5.09 #3) If " Normal" operating temperature is 545'F to 580*F, "C" is correct.

Reference 2103.05 Att. C-5 and A-8.

i If " Normal" Operating temperature is 80*F to 580*F, "B" is correct.

5.12 [Since it is a function of B-T/B + T]

(ANO terminology) 5.13 d. False Reference SAR 6.3.3.3.1.3F No H2 included in safety analysis calculations if clad temperature 4

is < 1800*F.

Question 6.08 Part a. TM/LP should be changed to DNBR or Low Pressurizer Pressure.

Keason: ANO-2 does not have a TM/LP Trip.

ATTACHMENT TO ANO-86-2-00693 re- .-n-e , . . . - - -- , - _ . . , . , _ , , . . -

ERC860484 07/16/86 Question 6.08 Part b. High Steam Generator water level results in a Reactor Trip, not a turbine trip. If it is assumed that the feedwater level control system level switch is in its normal position (both),

failure of a single channel will not affect system operation due to the high select feature of the feedwater control system. Failure of one channel would result in a level deviation alarm on panel 2C-12 at a setpoint of 10% level deviation.

Level transmitter for ANO-2 are 2 LT 1033, 2LT 1034, 2LT 1133 and 2LT 1134.

Reference:

STM-2-69 Question 8.01 Answer should be at > 40 gpm of 1731 ppa boric acid solution.

Question 8.11 ANO OP2502.01 previously listed Operations Superintendent and Nuclear Engineering. Latest Rev. lists Operations Superintendent and Reactor Engineering.

ANO has never had a group called Nuclear Operations.

Should accept Nuclear Engineering or Reactor Engineering.

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l ATTACHMENT TO ANO-86-2-00693

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