ML20153E749

Exam Rept 50-186/OL-86-02 on 860212.Exam Results:Candidate Issued Senior Operator License Upon Successful Completion of Test

ML20153E749
Person / Time
Site:	University of Missouri-Columbia
Issue date:	02/14/1986
From:	Burdick T, Mcmillen J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
To:
Shared Package
ML20153E742	List: ML20153E738 ML20153E749
References
50-186-OL-86-02, 50-186-OL-86-2, NUDOCS 8602250132
Download: ML20153E749 (7)

Text

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U.S. NUCLEAR REGULATORY COMMISSION REGION III Report No. 50-186/0L-86-02 Docket No. 50-186 License No R-103 Licensee: University of Missouri - Columbia Facility Nare: MURR Examination Administered At: Region III Office, Glen Ellyn Examination Conducted: Senior Reactor Operator Written (Section J only)

YT. M. Burdick, Region -/q Y Examiner (s):

Date Approved By: J. I. McMillen, Chief p//Y Operator Licensing Section Date Examination Summary Examination administered on (R_eport 50-186/0L-86-020n)_

One senior reactcroperator candidate was administered Section J of the written examination.

Results: The candidate was issued a senior operator license based upon successful completion of the examination.

• 4 B6022501328602yB6 PDR ADOCK O pg V

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REPORT DETAILS

1. Examiners T. M. Burdick, Region III

2. Examination Review Meeting No review meeting was held. The licensee has five working days following 1

the examination date to submit written /coments for consideration.

3. Exit Meeting No exit meeting was held.

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U. S. NUCLEAT*kt;ULATORY COMMISSION SENIOR REACTOR OPERATOR LICENSE EXAMINATION FACILITY: _yNIyEERIT1_QE_MIEEQUSI__

REACTOR TYPE: _IESI____________________

DATE ADMINISTERED:_B6/92/JZ._______________

EXAMINER: _SURpISth_I2_____________

APPLICANT: _________________________

INSIE9CII9BS_I9_ePELIggyli Use separate paper for the answers. Write answers on one side only.

Staple question sheet on top of the answer sheets. Points for each question are indicated in parentheses after the question. The passing Stade requires at least 70% in each category and a final grade of at least 80%. Examination papers will be picked up six (6) hours after the examination starts.

% OF CATEGORY  % OF APPLICANT'S CATEGORY

__V669E_ _1916( ___SCQ8E___ _y6(yE__ ______________C61EggBl_____________

_1Z299__ 199199 ___________ ________ J. SPECIFIC OPERATING CHARACTERISlICS

_1Z299__ 199299 ___________ ________ TOTALS FINAL GRADE _________________%

All work done on this examination is my own. I have neither Siven not received aid.

~~~~~~~~~~~~~~

PPL5CENi~5~555 hiURE

b z _ _ E E E CIEIC _9 E E B 611N G _ Q H 6 E 6 Q1[EISIIQS PAGE 2 QUESTION J.01 (1.00)

When the MURR reactor is changed from the 5 MW configuration to the 10 MW configuration what is the GUANTITATIVE affect on the MAGNITUDE of the core differential pressure?

QUESTION J.02 (2.00)

State the normal operating range for the following parameters *

a. Thermal power

b. Reactor outlet temperature

c. Pool level

d. pressurizer pressure DUESTION J.03 (3.00)

State the POOL makeup water flow rating and the basis for it.

QUESTION J.04, (3.00)

HOW and WHY does the temperature coefficient for pool water differ from that of the core cooling water?

OUESTION J.05 (2.00)

At power levels above 100 KW the control blades must be positioned such that no two blades are greater than one inch apart,

a. What does this accomplish?

b. What adverse consequences could occui if this were not done?

(3 required)

(arrr* CATECORY J CONTINUED ON NEXT PAGE xx*rr)

1 J.__EEEGIEIG_DEEBBIINQ_QBBB6QIQBIEIIGE PAGE 3 ,

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QUESTION J.06 (2.00)

It was reported by letter to the NRC that an emergency generator problem occured during a routine load test surveillance (CP-17). Apparently the engine stalled shortly after loading. Subsequent study revealed a large difference in initial electrical load dependins upon which ventilation exhaust fan was loaded on the generator (ie. running or standby). What reason is attributed to this?

00ESTION J.07 (2.00)

The emergency generator was discovered to have shutdown 5 minutes after starting in response to the 7 day automatic exercise. Investigation showed that the electrical fuel pump was not operating due to open contacts in the control switch. If the fuel pump was not operating how could the engine run for U tiinutes before stopping?

OUESTION J.08 (2.00)

In February 1985 the reactor scrammed on a signal from the reactor outlet pressure transmitter. This was attributed to abnormal high core flow.

Justify this reasoning.

(rrrrr END OF CATEGORY J rrrrn)

(xxxxrrrwxxxx2 END OF EXAMINATION xxxx***rxrxxxxm) _

i PAGE 4 dl__EEEGIEIG_QEEBBIIHG_GUBBeGIEBIEIJr?

ANSWERS -- UNIVERSITY OF MISSOURI -86/02/28-BURDICK, T.

MASTER CORY ANSWER J.01 (1.00)

Th2 core differential pressure INCREASES E.53 by a factor of FOUR E.53.

REFERENCE MURR TRAINING MANUAL, PAGE I-33 ANSWER J.02 (2 00)

s. 10 +0-5% MW

b. 136 degrees F

c. 29 feet-7 inches +/- 3 inches de 67 */- 3 psis E.5 each3 REFERENCE SOP /I-14 ANSWER J.03 (3.00) 1000 GPM E1.03 Sufficient enough flow to maintain the pool water level 3 feet [1.03 above a severed 6 inch beam port [1.03 REFERENCE i MURR TRAINING MANUAL, PAGE I-11

)

l ANSWER J.04 (3.00) l The core cooling water temperature coefficient is NEGATIVE E.53 whereas the pool cooling water temperature coefficient is POSITIVE E.53.

Water has neutron absorption potential as well as moderating properties E.53. Which one of the two properties prevails is dependent upon the water to fuel ratio in that particular region in question E.53 With a low H/U ratio in the core the moderating property prevails and a temperature rise causes a reduction of the moderator thus havin3 a negative affect E.53.

Whereas in the pool with a high H/U ratio the absorption prevails so an increase in temperature has a positive affectE.53

il__ffEGIEIG_QEEB611NG GUBBBQIESIEIIGE PACE 5 ANSWERS -- UNIVERSITY OF MISSOURI -86/02/28-BURDICK, T.

REFERENCE MUUR HAZARD

SUMMARY

REPORT, PAGE 4-14 ANSWER J.05 (2 00)

o. ensure validity of peaking factors E.53

b. clad fai1>re E.53, hi E.53, high radiation E.53 Sl04. ok & gh coolant activity REFERENCE SOP /II-2; TS 3.2.b; REP 20 ANSWER J.06 (2.00)

Th2 running fan presents a spialler load since it is in motion when the

- ergency generator picks up the load [1.03. The idle fan takes more power to initially start and therefore is a larger load to carry initially [1.03.

REFERENCE LETTER TO THE NRC DATED JANUARY 11, 1985 ANSWER J.07 (2.00)

Thsre is a small reservoir of fuel that provides for starting the engine that allowed operation until it ran dry.

REFERENCE LETTER TO THE NRC ANSWER J.08 (2.00)

High core flow resulted in a greater core pressure drop causing core outlet pressure to decrease.

REFERENCE B4-85 ANNUAL REPCRT PAGE I-7