Text

Proposed Tech Spec Changes,Clarifying Definition of Cold Shutdown Re Reactor Leak Check During Refueling Outage
	ML19344B402
Person / Time
Site:	Browns Ferry
Issue date:	10/16/1980
From:	; TENNESSEE VALLEY AUTHORITY
To:	;
Shared Package
ML19344B399	List: ML19344B398; ML19344B402;
References
	NUDOCS 8010200534
	Download: ML19344B402 (5)
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[T. J.$ ' Cold conditioni " Reactor coolant temperature equal to or-N*:, 6W 'less than 212*F. ~ ~ (K4 $ Mot 854j;jgsm7-The yeautor is' in the shutdown mode 'and ') thelreactor,: coolant Wperature greater than 212*F. .\\ s .\\ 'g, 4 ...L(,,LCold'Shutoown - The' reactor is-in the sbutdown mode othe..

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reactor coolant -temperature equal to or -less than 212*F. l t e s s N.. Mode of operation -;A. reactor mode switch selects the j . proper interlocks for the operational ~ status'of the: il c, . unit. ; The following 'are the modes and interlocks provided : l p i 1. Startup/ Hot Standbv Mode ~_Inhis' mode the reactor . protection scram trips initiated by condenser low i vacuum and main steam.line isolation valve closure, + ' ' a are bypassed.when: reactor pressure is less.than 1055;psig,-the reactor protection system is ' 5: -energized.with IBM neutron monitoring system tripi 'the. APRM 155.high flux. trip, and control rod 'withdrawai interlocks in-service.- This is often O referred to as' just Startup. Mode. This --is~ intended' 7 to ~ imply the Startup/ Bot Standby position.of the-mede~ switch.' /. m '2. Run ModeJ-' In this mode.the reactor system pressure [. ) ,m

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is. at or above,850 psig and the reactor protection s' o . system is energized:with APRM: protection (excludingL e ' E .the11$5 hightfluz. trip) and RBM interlocks in n tservice. Ua = '3.. Shutdown Mode -' Placing ~the mode switch to the ~ ~ FqG e

shutdown position initiates a reactor. scram-and h~T

' 'Apower'to the control' rod drives is removed.- Afteri J ialshortvtimeL periodL (abcut 10 'sec)', the scram w 1- ' signal'is t removed allowing a scram reset and h" W restoring < the normallvalve ~1ineup }in-the control-u f E tradidrivethydraulic system; also, the main steam .'lineiisolationi scram and main condenser low vacuum N@Ma i

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TscramLareibypassed rif. reactor, vessel ^ pressure is ~ c m. g uhelowi1055apsig.- S-gy py ~ 3;, ,x, m:, ,a' ~ p;; y + n ,a ~4.i, l' f;,-lQ,1,?' 3 f. ..l $,f '$ ;: Q i ~ %,,%', ~ i- ~,'O Q w,,, Q v ~

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ML19344B402

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