ML20117P311

Proposed Tech Specs,Revising Change 186 to Ts,Indicating New Safety Limit MCPR Valid Only for Util Cycle 19

ML20117P311
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	09/17/1996
From:	VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20117P310	List: BVY-96-109, Provides Revised TS Pages to Change 186,indicating That New Safety Limit MCPR Valid Only for Util Cycle 19 ML20117P311
References
NUDOCS 9609230060
Download: ML20117P311 (1)

Text

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• VYNPS 4 l 1.1 SAFETY LIMIT 2.1 LIMITING SAFETY SYSTEM SETTING ,

I l 1

l l 1.1 FUEL CLADDING INTEGRITY 2.1 FUEL CLADDING INTEGRITY l Applicability: Apolicability:

l l Applies to the interrelated Applies to trip setting of the

. variable associated with fuel instruments and devices which thermal behavior. are provided to prevent the i nuclear system safety limits from being exceeded.

Obiective: Obiective:

To establish limits below which To define the level of the

the integrity of the fuel process variable at which I

cladding is preserved. automatic protective action is initiated.  !

Specification: Specification:  ;

l

, A. Bundle Safety Limit (Reactor A. Trio Settinos i' Pressure >800 osia and Core ,

Flow >10% of Rated) The limiting safety system trip settings shall be as .

When the reactor pressure is specified below:

>800 psia and the core flow l is greater than 10% of 1. Neutron Flux Trio

( rated: Settinos

1. For the Cycle 19 core a. APRM Flux Scram Trio l loading, the existence Settino (Run Mode)

of a Minimum Critical l Power Ratio (MCPR) of When the mode switch l l l less than 1.10 (1.12 for is in the RUN i l Single Loop Operation) position, the APRM l shall constitute flux scram trip violation of the Fuel setting shall be as Cladding Integrity shown on Safety Limit (FCISL). Figure 2.1.1 and l Core loadings subsequent shall be:

l to Cycle 19 will require l recalculaticn of the S_g0.66(W-AW)+54%

MCPR.

where:

S = setting in

! percent of l rated thermal power (1593 MWt) l W = percent  ;

rated two loop drive 4

flow where 100% rated drive flow

. is that 4

9609230060 960917 flow PDR ADOCK 05000271 equivalent P PDR to 48 x 10 6 lbs/hr core flow Amendment No. M , 44, 64, 90, 94, M9, 6

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