ML20045E667

Proposed Tech Specs Clarifying Core Alteration Definition

ML20045E667
Person / Time
Site:	Vermont Yankee
Issue date:	06/25/1993
From:	VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20045E665	List: ML20045E664 ML20045E667
References
NUDOCS 9307020291
Download: ML20045E667 (1)

Text

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VYNPS , .

1.0 DEFIIIITIOffS F. Instrument Check - An instrument check is qualitative determination of acceptable ,

The succeeding frequently used terms are operabillt y by observation of instnament U00 explicitly defined so that. a unifonn behavior during operallon. This y interpretation of the speelfications may be deter.alnation shall includa, where possible.

4. achieved. cseparison of the instrument with other d independent instruments measuring the same g

r) o A. R_enortable occurjene_e - The equivalent of a reportable event which shall be any of the variable.

J l

A ** condtLlons specified in Section 50.73 to

'OO 10CFM parl 50.

• orca OO "O J B. Alteration of the Reactor Core - The act of moving

' O PJ UI any component affecting reactivity within the (M reactor vessel in the region above the core support plate, below the upper grid and within the shroud.

Normal movement of control rods or neutron detectors, or the replacement of neutron detectors is not defined as a core alteration.

C. [ lot Standby - Ifot standby means operallon

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with the reactor critical and the main steam line isolation valyes closed. .

Immediale - Immediate means that the required D.

• action will be initiated as soon as practicable considering the safe operation of the unit and the importance of the required action.

E. Ipstrument Calibratlott - An Instrument calibration means the ad.lustment of an instrument signal output so that. It corresponds, within acceptable range and accuracy, to a known valve (s) of the parameter which the instrument monitors.

Callbratton shall encompass the entire lustrument including actuation, alana, or trip. Response time as specified is not part of the routine instrument calibration but will be checked once per operallns cycle.

1 Amendment No. 28, 95

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