ML20070B527

Form NEL-014 Sheet 1 & 2, Control Rod Movement or Repair Procedure

ML20070B527
Person / Time
Site:	University of Utah
Issue date:	05/25/1988
From:	UTAH, UNIV. OF, SALT LAKE CITY, UT
To:
Shared Package
ML20070B459	List: ML20070B456 ML20070B488 ML20070B496 ML20070B498 ML20070B501 ML20070B504 ML20070B509 ML20070B516 ML20070B519 ML20070B521 ML20070B523 ML20070B527 ML20070B530 ML20070B534
References
NEL-014, NEL-14, NUDOCS 9101310218
Download: ML20070B527 (2)

Text

1 Form NEL 014 shcot 1 a

Rsc Approvol: sGsSB D

CONTROL ROD MOVEMENT OR REPAIR PROCEDURE Objective: To move the control rods in a safe manner while insuring that the reactor remains in a suberitical configuration.

Procedure:

1. Check out the reactor using TRIGA Preliminary Check Sheet (Form NEL-001 B.1).

2.

Remove fuel elements from selected rings which have total reactivity worth at least $0.50 greater than the total worth of all control rods. List the orcer of removal and storage positions.

Preolanned Fuel Movement Seouence FUEL ELEMENT STORAGE POSITION REACTIVITY WORTH 1.

2.

3.

4.

5.

~

6.

7.8.. ' ~

TOTALWORTH OF FUEL REMOVED TOTAL CONTROL ROD WORTH DIFFERENCE (> $0.50) 3.

Insert cadmium plug into the central Irradiator (worth >

$1,00),

4.

Withdraw the most reactive rod, not being moved, to its fully up position. An operator must be at the consolo during all procedures involving positive reactivity insertions.

5.

Loosen securing bolts of desired rod and remove from its present position. Following maintenance activity, replace control rod in original core aosition or locate in new areplanned core position. Record all control rod movements solow and in the Operations Log.

Control Rod Core Position Moved to Final Core Position Safety Shim-Safety Regulating l

6.

Repeat steps 4 and 5 if other control rods are removed.

Enter N/A above as necessary for control rods not affected l

by this procedure.

l 7.

Check rod drive cables for proper tension. Drive control rod

$b0 l[fCK 05000Ao7 18 esos31 O

PDR

Form NEL 014 Sheet 2 i

g.

l FISc Apprwd: Sf2sS8 servo mechanism to check for freedom of rnovement.

8.

Withdraw the safety rod to its up position.

9.

Remove the cadmium plug.

10. List all fuel movements to reestablish the core in the critical configuration. (Note: some control rod locations will necessitate adding more fuel than was taken out; therefore, an operator must monitor the power and approach to critical measurements taken to insure that the reactor will be suberitical by > $.50 when all rods are inserted.

Proclanned Fuel Movement Secuence FUEL ELEMENT STORAGE POSl]lON CORE POSITIOR 2.:

}.

~

5.

6.

7.

8.

11. Perform rod worth calibrations using the rod drop procedure (Form NEL-003).

BQd Worth Safety Sh!m safety Regulating Core Soecifications Shut Down Margin

(> $.50)*

Excess Reactivity

(< $2.80)**

12. Date procedure started:

13. Date procedure completed:

14. Senior Operator approval:

• Required by Technical Specification 3.2(1)).** Required by Tec Form approved by Reactor Safety committoe:

Reactor Administrator:.

N5f W!/. Date: May 25.1988 i

.-