ML20055C559

Proposed Tech Specs Re Fuel Elements Used in Reactor Core

ML20055C559
Person / Time
Site:	University of Missouri-Columbia
Issue date:	05/17/1990
From:	MISSOURI, UNIV. OF, COLUMBIA, MO
To:
Shared Package
ML20055C558	List: ML20055C557 ML20055C559
References
NUDOCS 9005250058
Download: ML20055C559 (3)

Text

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n 4 TECHNICAL SPECIFICATION-q UNIVERSITY OF MISSOURI -

m RESEARCH REACTOR FACILITY. .i

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Number 3.8 i p Page 1 of 2 I Date

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SUBJECT:

Reactor Fuel ,

' Anolicability This specification' applies to fuel elements used in the ' reactor- core.

Objective -

lThe; objective of this specification is to assure that the reactor fuel is I Loperated within acceptable design considerations thus maintaining fuel l(

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' integrity, f Soecificatio n '  !

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a. The peak burnup for. UAl x intermetallic fuel shall not exceed a calculated ]

!.2.3 x 1021 fissions per cubic centimeter. ]

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b. TheLreacto'r will not be operated using' fuel in which anomalies- have been  ;

- detected or 'in which dimensional changes of any coolant channel between-_ j ifuel: plates exceed ten (10) mils.

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' c. .The- reactor core shall consist of eight fuel assemblies. ] l

Exception: The reactor may be operated to 100 watts above shutdown power on -]

less than eight assemblies for purposes of reactor calibration or multiplication ]

studies.- ) l

d. All fuel elements or fueled devices outside the reactor core shall be stored in -!

a geometry..such that the calculated K eff si less than 0.9 under all conditions ]  ;

of moderation.

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i " - TECHNICAL SPECIFICATION UNIVERSITY OF MISSOURI

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K RESEARCH REACTOR FACILITY Number 3.8 Page 2 of 2 Date -,

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SUBJECT:

Reactor Fuel (continued) u

' e; Irra'hted fuel elements shall be stored in an array which will permit suf'he,nt. natural convection cooling such that the fuel element temperature 1 - will not exceed design values.

Bases  !

a. The fuel burnup limit restricts the. peak fissions per cm 3 burnup to values ]

L correlated to result in less than a 10% swelling of the fuel plates, it has - -

been' found that fuel plate swelling of less than 10% has no detrimental effect~ on fuel plate performance. (Ref. License R-103 Change No. 4 dated i

August 12,1968, Change No. 6 dated November 25,1970, and Application- ]

.' dated September 12,1986 with supplements). ]

.b; Specification 3.8.b assures that fuel . elements which have been inspected and found-to be defective are no longer used for reactor operation.

cc1To assure the validity of the safety limit curves (specification 2.1) and ]

other safety analysis, specification 3.8.c limits the core to eight fuel _ ]

elements at any significant power level. ]

d.- The' limits imposed b'y specifications 3.8.d and 3.8.e are conservative and-assure safe fuel storage. ,

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7 TECHNICAL SPECIFICATION UNIVERSITY OF MISSOURI

,' RESEARCH REACTOR FACILITY Number 5.5 L Page 1 of 1 Date i

SUBJECT:

- Fuel Elements Acolicability This specification shall apply to the surveillance of the reactor fuel ' elements.

Objective The objective of this specification is to reasonably assure proper performance -

'of the reactor fuel. -

j Soecification '

i One out of every eight (8) fuel elements that have reached their end-of-life ]

will be inspected for' anomalies. )

Bases The specified inspections along with the on-line fission product monitoring - )

and the routine water chemistry inspection of the primary coolant provides for )

-the detection of anomalies resulting from reactor operation and reduce the ]

possibility of fission product release to the primary coolant.

Inspecting the )  ;

fuel elements at the end of their life has the added advantage of allowing for ]-

the decay of the fuel elements and, hence, reducing the personnel exposure. ]

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