ML20135H805

Proposed Changes to Tech Spec 3.1 Re Subcritical State of Reactor During Fuel Loading Changes

ML20135H805
Person / Time
Site:	University of Michigan
Issue date:	09/18/1985
From:	MICHIGAN, UNIV. OF, ANN ARBOR, MI
To:
Shared Package
ML20135H802	List: ML20135H801 ML20135H805
References
NUDOCS 8509240246
Download: ML20135H805 (1)

Text

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e TECHNICAL SPECIFICATIONS Ford Nuclear Reactor Docket 50-2, License R-28 November, 1984

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3.O LIMITING CONDITIONS FOR OPERATION 3.1 - Reactivity Limits Applicability:  ;

This specification applies to the reactivity of the reactor core and to the reactivity worths of control rods and experiments.

When the reactor is operated with the heavy water reflector tank in place, the limits will not include the static reactivity worth '

of the tank. ,

Objective-l To assure that the reactor can be controlled and shutdown ,

at all times and that the safety limits will not be exceeded.  !

Specification: I I

(1) The shutdown margin relative to the cold, xenon free i critical condition shall be at least .025 delta K/K with l all three shim safety rods fully inserted and the regulating rod fully withdrawn and 0.0045 delta K/K with '

the most reactive shim safety rod and the regulating rod fully withdrawn.

(2) The overall core excess reactivity including moveable experiments shall not exceed O.038 delta K/K.

(3) The total reactivity worth of all experiments shall not exceed 0.012 delta K/K.

(4) The reactivity worth of each experiment shall be limited as follows:

Maximum Exoeriment Reactivity Worth Moveable 0.0012 delta K/K Secured 0.012 delta K/K (5) The reactor shall be subcritical by at least 0.025 delta K/K during fuel loading changes.

(6) Shim safety rods shall not be removed from the core for inspection if the shutdown margin is less than 0.01 delta K/K with the most reactive remaining shim safety rod fully withdrawn.

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l (7) The reactivity worth of the regulating rod shall not' l

I exceed.O.OO6 delta K/K.

85092gO P

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