ML19344B402

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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50 Operable'- A systee or component shall be ceneidered operable whos; o

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- - V' F. Operettan' ,0perating meane that a eyete's or/composeatLia'perfore-41 , ' tag its intended functioneL in ite' reiguired manner.- s , . '$ f C.i tenedtete;( teoediate.meane that the. required-acties will be int-4:. 81sted as seen se practAcable considering the-esfe operetten of 1 the" weit' and' the tapertence of the required action. , + . 38. Iteactor- Power operatspa, - Meactos power operation ie'say operation 'with the mode evitch in the'"Startup";or."Run" posities with the reacter critical anri above 11 rated power. 4 <

c 1.- Not standbv condition - Ilot standby condition meane operation with' .

coolant, temperature greater - than: 212*F. systa's pressure -lees than'. ' i af 1035 pois, tt.e sein etese toolation valves cleoed~and the sede switch g* " .in the'Startup/ Hot Standby Poettion. N l J. . Cold condition - Aeactor coolant temperature equal to er lose then r; 1: ~212'F.

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K. Hot Shutdevn .The reactor la in the shutdown modo and the reacter

g coolant; temperature Breater than 212'F.

., X L.- . Cold shutdown - The reactar.1= in the shutdevu.ande. the reactor t m coelset. temperature equal to or lees'than 212*F.. g ' .o.. M O O st. Mede of Operattoe - A reactor mode switch selects'the proper inter. 7 A = . locke for .the operational statue' ef. the v. sit. . The followieg .are the n x, 'medes_and interlocks provisled:

' 11. percup/not Seandby Mode - In ,ehim made the reacter peotectice .

se o trips initiated by~rnadenaer low vacuum and mais steme . ".^ - ', 'r 'line toeletten valve-clonure, are bypassed when tsacter pressure l1s-less' than 1055fpeia,sthe: reactor procecties erstem is-energised fwith Ilpt neutron monitoring system trip.:the Aplut 152 high fles - trip. and. control red withdrewal interlocke la service. This 'is. . 'eften referred to-se,just Startup Mode.. This'La 1standed to imply; , . ithe'Startup/Ilot Standby posities.of the. mode-switch.' . - ,-[' , 'Q r ' ' , ;'s - . > i , -~ x

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[T. N*:, _, J.$ ' Cold conditioni " Reactor coolant temperature equal to or- * 'less than 212*F. 6W ~ , - (K4 $ Mot 854j;jgsm7- The yeautor is' in the shutdown mode 'and ') ~ . thelreactor,: coolant , . s Wperature greater than 212*F. .\ 4 . .\ 'g, 7 , . . .L( ,,LCold'Shutoown - The' reactor is-in the sbutdown mode othe , .. :1 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 ,m '2. Run ModeJ-' In this mode .the reactor system pressure [. ) o

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is. at or above,850 psig and the reactor protection s' . 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 u . f , restoring < the normallvalve ~1ineup }in- the control-h" W , E tradidrivethydraulic system; also, the main steam . .'lineiisolationi scram and main condenser low vacuum '

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