ML20153E552

Proposed Tech Specs Re Definition of Operable

ML20153E552
Person / Time
Site:	Cooper
Issue date:	02/19/1986
From:	NEBRASKA PUBLIC POWER DISTRICT
To:
Shared Package
ML20153E547	List: ML20153E552 NLS8600071, Supplemental Application for Amend to License DPR-46, Consisting of Revised Proposed Change 16,revising Tech Specs Re Definition of Operable
References
NUDOCS 8602250061
Download: ML20153E552 (2)

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8. . . Simulated Automatic Actuation:- Simulated automatic actuation means applying a simulated signal to the sensor to actuate the. circuit in question.

- 9. Trip System - A trip system means an' arrangement of instrument channel trip signals and auxiliary equipment required to initiate action to. accomplish a protective-function. A trip system may require one or more instrument.

j channel trip signals related to one or more plant parameters in order to  ;

initiate trip system action. Initiation of protective action may require the tripping of a single trip system or the . coincident tripping of two trip systems.

J. Limiting Conditions for Operation (LCO)' *The limiting conditions for operation-specify the minimum acceptable levels of system performance necessary to assure safe startup and operation of the facility. .When these conditions are. met, the

. plant can be operated safely and abnormal situations can be safely controlled.

i Limiting Conditions for Operation (LCO) .shall be applicable during the operational conditions specified for each' specification.

Adherence to the requirements of the LCO within the specified time interval shall constitute compliance with the specification. In the event the LCO is restored i prior to expiration of the specified time. interval, completion of the LCO action is not required.

In the event an LCO cannot be satisfied because of circumstances in excess of those addressed in the specification, the facility shall be placed in HOT.

SHUTDOWN within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> unless-corrective measures are completed that permit operation under the LCO for the i specified time interval as measured from initial discovery. Exception to these

! requirements shall be stated in the individual specifications.

t l Entry into an operational condition shall not be made unless the conditions of i the LCO are met without reliance on the actions specified in the LCO unless

! otherwise excepted. This provision shall not prevent passage through operational ccnditions required to comply with the specified actions of an LCO.

When a system, subsystem, train, component or device is determined to be.

inoperable solely because its emergency power source is inoperable, or solely

. because its normal power source is inoperable, it may be considered OPERABLE for i

the purpose of satisfying the requirements of its applicable Limiting Condition for Operation, provided: (1) its corresponding normal or emergency power source is OPERABLE; and (2) all of its redundant system (s), subsystem (s), train (s),

component (s) and device (s) are OPERABLE, or likewise satisfy the requirements of this specification. Unless both conditions (1) and (2) are satisfied, the unit shall be placed in at least HOT SHUTDOWN within'6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in at least COLD SHUTDOWN within the fo110 wing 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. This specification is not applicable in the cold condition or the refueling mode.

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Limiting Safety System Setting (LSSS) - The_ limiting safety system settings are settings on. instrumentation which initiate the automatic. protective action at a 4

level such that the safety limits will not be exceeded. The region between the safety _ limit and these settings represent a margin with normal operation. lying below these settings. .The margin has been established so that with proper operation of the instrumentation the safety limits will never be exceeded.

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i L. Mode - The reactor mode is established by the mode selector switch. The modes include refuel, run, shutdown and startup/ hot standby which are defined as follows:

4 1. Refuel Mode - The reactor is,in the refuel mode when the. mode switch.is-in J.

the REFUEL position. When the mode switch is in the REFUEL position, the  !

refueling interlocks are-in' service.

! 2. Run Mode - In this mode the reactor system pressure is at or chove 825 psig

, and the reactor protection system is energized with APRM protection 1

(excluding the 15% high' flux trip) and RBM interlocks in service. .g i 3. Shutdown Mode - The reactor is in the shutdown mode when' the mode swit ch is i in the SHUTDOWN position, i 4. Startup/ Hot Standby Mode - In this mode the reactor protection scram trips i initiated by the main steam line isolation valve closure are bypassed, the low pressure main steam line isolation valve closure trip is bypassed, the i reactor protection restem is energized with APRM (15% SCRAM) and-IRM neutron '

i monitoring system trips and control rod withdrawal interlocks in service.

M. Operable - Operability - Operating l

i l 1. Operable - Operability - A system, subsystem, train, component or device j shall be OPERABLE or have OPERABILITY when it is capable of performing its-g specified function (s). Implicit in this definition shall be the assumption i that all necessary attendant instrumentation, controls, normal and emergency r

electrical power sources (except as specified in Sections 1.0.J and 3.9),

cooling or seal water, lubrication or other auxiliary equipment that are j required for the system,' subsystem, train, component or device to perform its function (s) are also capable of performing their related support j j function (s),

i 2. Operating - Operating means a system, subsystem, train, component, or device is performing its intended function in its required manner. ,

N. Deleted.

, 0. Operating Cycle - Interval between the end of one refueling outage and the end of the next subsequent. refueling outage.

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