Text

Corrections to Proposed Tech Spec 3/4.1 Re Reactivity Control Sys
	ML20198R125
Person / Time
Site:	Waterford
Issue date:	01/21/1998
From:	; ENTERGY OPERATIONS, INC.
To:	;
Shared Package
ML20198R070	List: ML20198R069; ML20198R125;
References
	NUDOCS 9801230225
	Download: ML20198R125 (7)
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9 Attachment to W3F198 0006 Errata: Marked-up TS Pages for NPF-38-196 Pages: 3/411 l

3/413 3/4113 3/4 10-1 i-B 3/4 1-1 l

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a 114.1 erarTIVITy enMTaru sygTENE 1/4.1.1 ma**TfoN CONTaru SHUTnnWM "^^*fM - ANY FULL LENGTH CEA WITHn8_^E" 5

s LIMITING CONDITION FOR OPERATION 3.1.1.1 The $WTDOW MARGIN shall be greater than or equal to that sWeified in the COLR.

j APPLMcAIILf"Y: MODES 1, 2*, 3, 4, and 5 wM any full length CEA fully or part1al y w thdrawn.

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With the SWTDOW MARGIN less than thath

, immediately inititte ud nati.x boration :t ernt:r thr Or :;r? t: ^^ ;;: Of : : h.f = n:.-

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7: ;ir,;SWTDOW MARGIN ^^ -- ";at:r th = :: :;z1 t: 170* ;;; i;72 ;7 :;; he ur.t stil tM wAOA lty;}+)

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+o suavfTLLANCE REGUIREMENTE 4,1.1.1.1 With any full length CEA fully or partially withdrwn, the SWTDOW MARGIN shall be determined to be greater than or equal to that specified in the COLR:

4 Within I hour after detection of an inoperable CEA(s) and at least a.

once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the CEA(s)he above req is inoperable.

If the inoperable CEA is immovable or untrippable, t SWTDOW MARGIN shall be verified acceptable with an increased allowance for the withdrawn wrth of the immovable or untrippable CEA(s).

b.

When in MODE 1 or MODE 2 with Keff greater than or equal to 1.0, at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months by verifying that CEA group withdrawal is within,the Transient insertkn Limits of Spe:ification 3.1.3.6.

i Wheet te MDDE 2 with Keff less than 1.0, within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to c.

achieving reactor criticality by verifying that the predicted critical CEA_ position is within the liatts of Specification 3.1.3.6.

i See Special Test Exception 3.10.1.

e WATERFORD - UNIT 3 3/4 1-1 AMENDMENT N0. 11,33,1^2 4

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KACTIVITY CGNTIGL SYSTDis r

SHUTDolg MARRid - ALL FULL LENGTH CEAS FULLY INSERTED i

l LIMITINC CONDITION FOR OPERATION 3.1.1.2 The SWTDOW MARGIN shall be greater than or egual to that specified in the COLR.

APPLICABILITY:

MODES 3, 4 and 5 with all full length CEAs fully ' inserted.

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With the SHUTDOW MARGIN less than that specified in the COLR, immediate1 initiate : d ::: tin:: boration et gr::ter th er ::::1 te SS ;;: c' : ::.

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4 SHUTDOW MARGIN i: r;;t:rd,

" 50gELLANCEREQUIREMENTS

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4.1.1.2 With all full length CEAs fully inserted, the SHUTDOW MARGIN shall be determined to be greater than or equal to that specified in the COLR, at least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by consideration of the following factors:

1.

Reac' tor Coolant System boron concentration, 2.

CEA position, 3.

Reactor Coolant System average temperature, 4

4.

Fuel burnup based on gross theresi energy generation, 5.

Xenon concentration and 6.

Samarium concentration.

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WATERFORD - WIT 3 -

3/4 1-3 AMENDMENT No. ::,33,192 l

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l 3/4.!d SPECIAL TEST EXCElIIONS 3/4.10.1 SHUTDOWN MARGIN LIMITING CONDITION FOR OPERATION 3.10.1 The SHUTDOWN MARCIN requiremint of Specification 3.1.1.1 or 3.1.1.2 may be suspended for seasurement of CEA worth and SHUTOOWN MARGIN provided reactivity equivalent to at least the highest estimated CEA worth is available for trip insertion from CPERABLE CEA(s).

APPLICABILITY:

MODES 2 AND 38 ACTION:

With any full-length CEA not fully inserted and with less than the a.

above reactivity equivalent available for trip insertion, immedi-ately initiate --' --"two-boration at ;r;:ur tha : :;;:1 u

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= hr:a er d u :;uhc hnt t n ;he SHUTDOWN MARGIN;;;;t:r tua er :; :1 t:-U20 Specification 3.1.1.1-h r::t:r:..

required by ggg u

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With all full-length CEAs fully inserted and the reactor suberitical by less than the above reactivity equivalent, immediately initiate eM eeeth= boration +t ;-*de-th= a-W ta 20 0^

ef a-echtfer certe!*; ;reater ther er e';=1 t: 1?20 ;;: 5:r:r er ite

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hnt until the SHUTDOWN MARGIN required by Specification 3.1.1.2 h: ::ur:".

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to res SURVEILLANCE REQUIREMENTS 4.10.1.1 The position of each full-length and part-length CEA required either partially er fully withdrawn shall be determined at least once per 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

4.10;1.2 EacteCEA not fully inserted shall be demonstrated capable of full insertion when tripped from at least the 50% withdrawn position within 7 days prior to reducing the SHLTTDOWt MARGIN to less than the limits of Specification 3.1.1.1.

" Operation in H000 3 shall be limited to 6 consecutive hours.

WATERFORD - UtilT 3

's/4 In-1

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-3/4.1 REACT!VITY DONTROL SYSTEMS

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-3/4.1.1 Sp4ATION CONTROL s

3/4.1.1.1 and 3/4.1.1.2 SHUTDOWN m RGIN' SHUTDOWN MARGIN is the amount by which the core is suberitical, or would be subcritical irmediately following a reactor trip 1

malfunction resulting in the highest worth CEA failIng nsidering a single co to insert.

The function of SHUTDOWN MARGIN is to ensure that the coactor remains 2

suberitical following a oesign basis accident or anticipated operational During operation in M00ES 1 and 2, with k,ff greater than or occurrene.e.

equal to 1.0, the transient insertion limits of Specification 3.1.3.6 ensure that sufficient SHUTDOW MARGIN is available, SHUTDOW MARGIN requirements vary throughout the core life as a function j

of fuel depletion and reactor coolant system (RCS) cold leg temperature (Teold)*

j The most restrictive condition occurs.at E0L, with (Teold) at no-load operating l

temperature, and is associated with a postulated staan line break accident and the resulting uncontrolled RCS cooldown.

In the analysis of this accident, the specified SHUTDOWN MARGIN is required to control the reactivit ensure that the fuel performance and offsite dose criteria are/ transient and i-satisfied.

As (initial) T decreases, the potential RCS,cooldown and the resulting reactiv-cold ity transient are less, severe and, therefore, the required SHUTDOW MAPSIN also decreases.

Below T of about 200*F, the inadvertent deboration event becomes cold limiting with respect to the SHUTDOW MARGIN requirements., Below 200'F the specified SHUTOOWN MARGIN ensures that sufficient time for operator actinns exists between the initial indication of the deboration and the total loss of SHUTDOW MARGIN. Accordin these limiting conditions. gly, the SHUTDOWN MARGIN requirements are based upon i.

Additional events considered in establishing reautrements on SHUTDOWN MAR-

% GIN are single CEA withdrawal and startup of an inaci.tve reactor coolant pump.

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Other technical specifications that reference the Specifications on SHUT-

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00W MARGIlkare: 3/4.1.2, 80 RATION SYSTEMS, 3/4.1.3, MOVA8LE CONTROL ASSEMBLIES, 3/4.9.1, REFUEU.MG OPERATIONS - 80RON CONCENTRATION, and 3/4.10.1, SHUTDOWN MARGIN.

3/4.1.1.3 M00ERATOR T90'ERATURE C0 EFFICIENT The limitations on moderator temperature coefficient (K(C) ~are provided L

to ensure tnat the assumptions used in the accident and transient analysis remain valid through each fusi cycle.

The Surveillance Requirements for measurement of the MTC during each fuel cycle are adequate to confirm the MTC value.since this coefficient changes slowly due principally to the reduction in RCS boron concentration associated with fuel burnup. 'The confirmation that 3

the measured MTC value is within its limit provides -assurances that the coef-ficient will be meintaiaed within acceptable values throughout each fuel cycle.

WATERFORD'- UNIT 3 8 3/4 1 AMENDMENT E0. M-1

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INSERT A if_the SHUTDOWN MARGIN requirements are not met, boration must be

-initiated iminediately. Boration will continue until the SHUTDOWN MARGIN requirements are met.

In the determination of the required combination of boration flow rate and boron concentration, there is no unique requirement that must be satisfied provided the boration source is sufficient to achieve the SHUTDOWN MARGIN.

Since !! is imperathe to raise the boron concentration of the RCS as soon as possible, the boron concentration should be a highly concentrated solution, such as that normally found in the boric acid makeup tanks or the refueling water storage pool. The Operator shouid borats with the best source available for the plant conditions.

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ML20198R125

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