ML20151Y100

SOP 98-15, Starting Reactor After Locating Failed Fuel Element

ML20151Y100
Person / Time
Site:	University of California-Davis
Issue date:	09/08/1998
From:	Heidel C AIR FORCE, DEPT. OF
To:
Shared Package
ML20151Y014	List: ML20151Y010 ML20151Y084 ML20151Y093 ML20151Y100
References
NUDOCS 9809180107
Download: ML20151Y100 (10)

Text

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l SOP 98-15 1

STARTING THE REACTOR AFTER LOCA TING FAILED FUEL ELEMENT l

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PREPARED BY: fharles C. Heidel DA TE: % ~ A- %

REVIEWED BY: WM ~Y u DA TE: 4 ~%

OPE TIO S SUPERV}SOR '

_h DA TE, 8Sc'Pis i PHYSICS RVISOR HEALTG APPROVED BY: L DA TE: 9-8~ $ 8 FXCillTY DIREf0)1) I 9909180107 990915 PDR ADOCK 05000607 i

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( l PURPOSE l

The purpose of this document is to startup the reactor after finding a leaking fuel element. The l reactor shall be started up in controlled incremental increase to ensure there is no addition leaking fuel elemente. {

[ ll PRECAUTIONS i

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The following precautions shall be observed during all phases of the operation.

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1. All equipment and tools removed from the reactor tank shall be checked for contamination.

2. All primary water shall be treated as potentially contaminated.

3. All operations in the reactor tank shall be under the direct supervision of a Senior Reactor Operator.

4.

Personnel access to the reactor room shall be restricted while the reactor is operating untilit is confirmed that there are no further leaking fuel elements.

5. When ever any member of the Operation and/or Health Physics staff has a question about the procedure or operation all work shall cease until the question is answered to their satisfaction or management resolves the matter.

til STARTUP OF THE REACTOR c

a.

Perform a normal reactor startup to 50 watts and take the critical readings.

" Note: Remain at each power level for 10 minutes or a notable increase in the CAM reading is detected,

b. Increase the reactor power level to 10 kWs and look for a notable increase in the reactor room CAM or the portable CAM channel. Record the channel readings on TABLE 1.

c. If no notable increase is noted then increase the reactor power 50 KWs. Record the CAM channel readings on TABLE 1. Continus increasing the reactor power level in 50 kW increments until a significant increase is noted on the CAMS or 1600 KWs is reached, if a fuel element leakage is detected, at any of the power increases shutdown the reactor and proceed to Section IV.

d.

If 1600 KWs is reached and no fuel element leak is detected shutdown the reactor and perform a normal reactor calorimetric.

e.

After the calorimetric has been performed return the reactor to 1600 kWs and ,

continue increasing the reactor power level in 50 kW increments until 2000 kWs is

,- reached. Record all data on TABLE 1.

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IV IF A LEAKING FUEL ELEMENTIS DETECTED

f. Place the reactor room ventilation system in the recirculation mode as per SOP-013.

Ensure that the reactor room ventilation system is exhausting to the stack. AC 1 is secured, and the reactor room is negative, g.

Ensure the portable CAM is operational and monitoring the reactor tank under the deck plate area.

h. Secure the primary pump.

i. Remove and replace 20 fuel elements from the reactor core as per the fuel transfer form.

j.

Perform a normal reactor startup to 50 watts and take the critical readings.

" Note: Remain at each power level for 10 mirwtes or a notable increase in the CAM reading is detected,

k. Increase the reactor power level to 10 KWs and !ack for a notable increase in the reactor room CAM or the portable CAM channel. Record the channel readings on TABLE 1. l

l. If no notable increase is noted then increase the reactor power 50 KWs. Record the channel readings on TABLE 1. Continue increasing the reactor power levelin 50 kW

. increments until an increase is noted on the CAMS or 1000 KWs is reached.

m.

If a fuel element leakage not detected, shutdown the reactor and begin replacing on a one for one basis each of the twenty elements removed and then repeat Steps j through rn until the leaking element is detected. it may be necessary to cool the reactor tank at this point. j

n. If fuel element leak is detected, replace the twenty elements remove in Step 1. and then remove another 20 elements. Repeat Steps j though m until the leaking element is discovered.

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i TABLE 1 (CAM readinos) l Particulate Noble Gas lodine Particulate Argon Gas (Rx Rm) (Rx Rm) (Rx Rm) (Portable) (Portable) 50 watts to kW 50kW 100 kW 150 kW 200 kW 250 kW -

- 300 kW 350 kW 400 kW 450 kW 500 kW 550 kW 600 kW 650 kW 700 kW 750 kW 800 kW 850 kW 900 kW

' 950 kW 1000 kW 8 u 1050 kW 1100 kW l

1150 kW \

1200 kW 1250 kW 1300 kW 1 1350 kW 1400 kW 1450 kW 1500 kW 1550 kW 1600 kW 1650 kW 1700 kW 1750 kW 1800 kW 1850 kW 1900 kW 1950 kW l 2000 kW l l

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