ML20141K174

Proposed Tech Specs 3.1.1.1,3.1.1.2,3.10.1 & Figure 3.1-1, Removing Cycle Dependent Boron Concentration

ML20141K174
Person / Time
Site:	Waterford
Issue date:	05/24/1997
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20141K164	List: ML20141K161 ML20141K174
References
NUDOCS 9705280355
Download: ML20141K174 (12)

Text

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3/4.1' REACTIVITY CONTROL SYSTEMS i

3/4.1.1 B0 RATION CONTROL SHUTDOWN MARGIN - ANY FULL LENGTH CEA WITHDRAWN

[

LIMITING CONDITION FOR OPERATION i

j 3.1.1.1 The SHUTDOWN MARGIN shall be greater than or equal to that specified in the COLR.

i APPLICABILITY:

MODES 1, 2*, 3, 4, and 5 with any full length CEA fully or

{

partially withdrawn.

ACTION:

f With the SHUTDOWN MARGIN' less than that required above, imediately initiate i

and continue boration at greater than or equal to 40 gpm of a solution con-l taining greater than or equal to 1720 ppe boron or equivalent until the required SHUTDOWN MARGIN is restored, t

SURVEILLANCE REQUIREMENTS I

4.1.1.1.1 With any full length CEA fully or partially withdrawn, the SHUTDOWN j

MARGIN shall be determined to be greater than or equal to that specified in the l

COLR:

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

once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> there&fter while the CEA(s) is inoperable.

If the I

inoperable CEA is i movable or untrippable, the above required SHUTDOWN MARGIN shall be verified acceptable with an increased allowance for the withdrawn worth of the immovable or untrippable CEA(s).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 <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by verifying that CEA group withdrawal is within the Transient Insertion Limits of Specification 3.1.3.6.

When in MODE 2 with Keff less than 1.0, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> prior to c.

achieving reactor criticality by verifying that the predicted i

critical CEA position is within the limits of Specification 3.1.3.6.

See Special Test Exception 3.10.1.

l WATERFORD - UNIT 3 3/4 1-1 AMENOMENT NO. 11,22,102 9705200355 970524 PDR ADOCK 05000382 p

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REACTIVITY CONTROL SYSTEMS j!iQTDOWN MARGIN - ALL FULL LENGTH CEAS FULLY INSERTED 1

LIMITING CONDITION FOR OPERATION 3.1.1.2 The SHUTDOWN MARGIll shall be greater than or equal to that specified j

in the COLR.

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

ACTION:

4 With the SHUTDOWN MARGIN less than that specified in the COLR, imediately l

initiate and continue boration at greater than or equal to 40 gpm of a solution containing greater than or equal to 1720 ppm baron or equivalent until the required SHUTDOWN MARGIN is restored.

l j

SURVEILLANCE RE0UIREMENTS 4.1.1.2 With all full length CEAs fully inserted, the SHUTDOWN MARGIN shall be determined to be greater than or equal to that specified in the COLR, at l

l least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by consideration of the following factors:

i 1.

Reactor Coolant System boron concentration, j

2.

CEA position, 3.

Reactor Coolant System average temperature,

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1 4.

Fuel burnup based on gross thermal energy generation, 5.

Xenon concentration,and 6.

Samarium concentration.

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WATERFORD - UNIT 3 3/4 1-3 AMENDMENT N0. 11,32,102

REQUIRED STOREL\\ D,RIC ACID VOLUME 5.

AS A FUNCTION Cf CpNCENTRATION d

15000 14000 REGION OF ACCEPTABLE g

OPERATION 3<

13000 o

RWSP at 1720 ppm w

)

I

/

RWSP at 2000 ppm 1

E

)

(

RWSP at 2300 ppm o

j h

(10003 87%)

q j

2 s

4 j

g (78%)

\\

J j

.000 o

j (69%)

(

l u

A E

REGION OF UNACCEPTABLE g

OPERATION (60%)

g-7000 -

's (50%)

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s000 2.25 2.50 2.75 3.00 3'.25 3.50 a.ason W.3m M.aust 5.2501 s.?ool is.usi 80RIC ACIO CONCENTRATION, W.5 (ppe)

FIGURE 3.1-1 WATERFORD - UN113 3/4 1-13 AMENDMENT NO. W S

0 p.

3/4.10 SPECIAL TEST EXCEPTIONS t

• 3/4.10.1 SHUTDOWN MARGIN LIMITING CONDITION FOR OPERATION 3.10.1 esy be suspenaed for measurement of CEA worth and SH for trip insertion from CPERABLE CEA(s). reactivity equivalent to at l

APPLICABILITY: MODES 2 AND 3".

l 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 and continue boration at gretter than or equal to 40 gpa of a solution containing greater than or equal to 1720 ppa i

boron or its equivalent until the SHUTDOWN MARGIN required by Specification 3.1.1.1 is restored.

b.

With all full-length CEAs fully inserted and the reactor subcritical by less than the above reactivity equivalent immediately i'nitiate i

and continue boration at greater than or equa,l to 40 gpa of a solution containing greater than or equal to 1720 ppm boron or its equivalent until the SHUTDOWN MARGIN required by Specification 3.1.1.2 is restored.

SURVEILLANCE REQUIREMENTS i

4.10.1.1 The position of each full-length and part-length CEA required either partially or fully withdrawn shall be determined at least once per 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

Each CEA not fully inserted shall be demonstrated capable of full l

4.10.1.2 insertion when tripped from at least the 50% withdrawn position within 7 days prior to reducing the SHUTDOWN MARGIN to less than the limits of Specification 3.1.1.1.

j 1

i

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

WATERFORD - UNIT 3 3/4 In-1 d

e i

.e 3/4.1 REACTIVITY CONTROL SYSTEMS d

[

. BASES l

3/4.1.1 80 RATION CONTROL 3/4.1.1.1 and 3/4.1.1.2 SHUTDOWN MARGIN b

SHUTDOWN MARGIN is the amount by which the core is suberitical, or would be subcritical immediately followirig a reactor trip, considering a single malfunction resulting in the highest worth CEA failing.to insert.

4

)

The function of SHUTDOWN MARGIN is to ensure that the reactor remains subcritical following a design basis accident or anticipated operational a

During operation in MODES 1 and 2, with k,ff greater than or occurrence.

equal to 1.0, the transient insertion limits of Specification 3.1.3.6 ensure that sufficient SHUTDOWN MARGIN is available.

SHUTDOWN MARGIN requirements vary throughout the core life as a function of fuel depletion and reactor coolant system (RCS) cold leg temperature (Tcold)*

The most restrictive condition occurs.at EOL, with (Tcold) at no-load operating temperature, and is associated with a postulated steam line break accident and the resulting uncontrolled RCS cooldown.

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

As (initial) T oecreases, the potential RCS cooldown and the resulting reactiv-eold ity transient are less. severe and, therefore, the required SHUTDOWN MARGIN also decreases.

Below T of about 200*F, the inadvertent deboration event becomes eold limiting with respect to the SHUTDOWN MARGIN requirements.. Below 200'F, the specified SHUTDOWN MARGIN ensures that sufficient time for operator actions exists between the initial indication of the deboration and the total loss of SHUTDOWN MARGIN.

Accordingly, the SHUTDOWN MARGIN requirements are base'd upon these limiting conditions.

Additional events considered in establishing requirements on SHUTDOWN MAR-GIN are single CEA withdrawal and startup of an inactive reactor coolant pump.

Other technical specifications that reference the Specifications on SHUT-DOWN MARGIN are:

3/4.1.2, BORATION SYSTEMS, 3/4.1.3, MOVABLE CONTROL ASSEMBLIES, 3/4.9.1, REFUELING OPERATIONS - BORON CONCENTRATION, and 3/4.10.1, SHUTDOWN MARGIN.

3/4.1.1.3 MODERATOR TEMPERATURE COEFFICIENT The limitations on moderator temperature coefficient (MTC) are provided to ensure that the assumptions used in the accident and transient analysis remain valid through each fuel 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 baron concentration associated with fuel burnup. 'The confirmation that the measured MTC value is within its limit provides assurances that the coef-ficient will be maintained within acceptable values throughout each fuel cycle.

WATERFORD - UNIT 3 8 3/4 1-1 AMENOMENT NO. 11 o

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NPF-38-196 ATTACHMENT B I

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7 3/4.1 REACTIVITY CONTROL SYSTEMS 3/4.1.1 BORATION CONTROL SHUTDOWN MARGIN - ANY FULL LENGTH CEA WITHDRAWN I (MITING CONDITION FOR OPERATION 3.1.1.1 The SHUTDOWN MARGIN shall be greater than or equal to that specified in COLR.

APPLICABILITY: MODES 1,2*,3 and 4, and 5 with any full length CEA fully or partially withdrawn.

ACTION:

With the SHUTDOWN MARGIN less than that required-abovespecified in the COLR. immediately initiate and cont!nue boration at gre:ter than or ^';ue! 40-44pm-oM S0!ution containing greater 4han cr ^';ue! to 1720-m borea er ^';utv:!:nt untitthe4equired-to restore SHUTDOWN MARGIN-is restored to within limit.

M/EILLANCE REQUIRFMFNTS i

4.1.1.1.1 With any full length CEA fully or partially withdrawn, the SHUTDOWN MARGIN shall be determined to be greater than or equal to specified in the COLR:

a. Within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> after detection of an inoperable CEA(s) and at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter while the CEA(s) is inoperab!e. If the inoperable CEA is immovable or untrippable, the above required SHUTDOWN MARGIN shall be verified acceptable with an increased allowance for the withdrawn worth of the immovable or untrippable CEA(s).

j

b. When in MODE 1 or MODE 2 with Kegy greater than or equal to 1.0, at least once per 12 I

hours by verifying that CEA group withdrawal is within the Transient insertion Limits of Specification 3.1.3.6.

1

c. When in MODE 2 with K ry less than 1.0, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> prior tG achieving reactor criticality e

by verifying that the predicted critical CEA position is within the limits of Specification 3.1.3.6.

I

• See Special Test Exception 3.10.1.

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WATERFORD - UNfr 3 3/41-1 Amendment No. 4bM,402

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REACTIVITY CONTROL SYSTEMS SHUTDOWN MARGIN - ALL FULL LENGTH CEAS FULLY INSERTED j

LIMITING CONDITION FOR OPERATION 3.1.1.2 The SHUTDOWN MARGIN shall be greater than or equal to that specified in the COLR.

1 APPLICABILITY: MODE 3,4 and 5 with all CEAs fully inserted.

ACTION:

With the SHUTDOWN MARGIN less than that specified in the COLR, immediately initiate and cent'nue boration atyetter then er que!40-449pm Of a E0!ut!On 00nte!9gge:ter than er egen! to 4720-ppm bcron er equ!v:!:nt un"! the rquired-to restore SHUTDOWN MARGIN isfestoredto within limit.

SURVEILLANCE REQUIRFMFNTS 4.1.1.2.1 With all full length CEAs fully inserted, the SHUTDOWN MARGIN shall be determined to be greater than or equal to specified in the COLR, at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by consideration of the following factors:

1.

Reactor Coolant System boron concentration, 2.

CEA position, 3.

Reactor Coolant System average temperature, 4.

Fuel bumup based on gross thermal energy generation, 5.

Xenon concentration, and 6.

Samarium concentration, i

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4 WATERFORD - UNIT 3 3/4 1-3 Amendment No. 44d3r402

REQUIRED STORED BORIC ACID VOLUME

'y AS A FUNCTION OF CONCENTRATION 15000 14000 REGION OF ACCEPTABLE p

OPERATION 2

13000

\\

E e

v.>

12 #

1

,RWSP at 2000 ppm mz

)

RWSP at 2300 ppm o

ui Eoy (87%)

(

10000 z<

a 2

9 y

(8*69%)

(

o ig REGION OF UNACCEPTABLE o

OPERATION (60%)

(

7000 (50 )

2.25 2.50 2.75 3.00 3.25 3.50 13,950)

(4.375) 14.825)

(5,250)

(5.700)

(6.125)

BORIC ACIO CONCENTRATION, WT.% (ppm)

FIGURE 3.1-1 WATERFORD - UNIT 3 3/4 1-13 AMENOMENT NO. 10,45

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,3/4.10 SPECIAL TEST EXCEPTIONS l-3/4.10.1 SHUTDOWN MARGIN l

l tulTING CONDITION FOR OPERATION 3.10.1 The SHUTDOWN MARGIN requirement of Specification 3.1.1.1 or 3.1.1.2 may be suspended for

)

measurement of CEA worth and SHUTDOWN MARGIN provided reactivity equivalent to at least the highest estimato) CEA worth is available for trip insertion from OPERABLE CEA(s).

APPLICABILITY: Modes 2 and 3*.

I ACTION:

a. With any full-length CEA not fully inserted and with less than the above reactivity equivalent available for trip insertion, immediately Initiate :M =dtn= boration at grerter *he et que!

i le 40 ;pm of: 00!d!0n cent &'n; ;recter the Or que!101720 pp-ber= or Me quiv: :nt l

until4he-to restore the SHUTDOWN MARGIN required by Specification 3.1.1.144estored.

i

b. With all full-length CEAs fully inserted and the reactor subcritical by less than the above j

reactivity equivalent, immediately initiate ed 00nt'n= boration et grect the et que! to 40 l

cf a ?9'!On cent 92n; grerter the er==! to 4720 ppm beren er !!: q& ::nt =t9 the

.s restore the SHUTDOWN MARGIN required by Specification 3.1.1.244estored SURVEli LANCE REQUIRFuFNTS i

4.10.1.1 The position of each full-length and part-length CEA required either partially or fully withdrawn shall be determined at least once per 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

4.10.1.2 Each CEA not fully inserted shall be demonstrated capable of full insertion when tripped from ai least the 50% withdrawn position within 7 days prior to reducing the SHUTDOWN MARGIN to les than the limits of Specification 3.1.1.1.

• Operation in MODE 3 shall be limited to 6 consecutive hours.

WATERFORD - UNIT 3 3/4 10-1 AMENDMENT NO. 44

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3/4.1 REACTIVITY CONTROL SYSTEMS i

4 1

BASES 3/4.1.1 BORATION CONTROL 3/4.1.1.1 and 3/4.1.1.2 SHUTDOWN MARGIN SHUTDOWN MARGIN is the amount by which the core is subcritical, or would be subcritical immediately following a reactor trip, considering a single malfunction resulting in the highest worth CEA falling to insert.

The function of SHUTDOWN MARGIN is to ensure that the reactor remains subcritical following a design basis accident or anticipated operational occurrence. During operation in MODES 1 and 2, with Ka greater than or equal to 1.0, the transient insertion limits of Specification 3.1.3.6 ensure that sufficient SHUTDOWN MARGIN is available.

SHUTDOWN MARGIN requiremeris vary throughout the core life as a function of fuel depletion and reactor coolant system (RCS) cold leg temperature (Tcold ). The most restridive condition occurs at EOL, with Tcold at no-load operating temperature, and is associated with a postulated steam line break accident and the resulting uncontrolled RCS cooldown. In the analysis of this accident, the specified SHUTDOWN MARGIN is requ! red to control the reactivity transient i

and ensure that the fuel performance and offsite dose criteria are satisfied. As (initial) Tcold decreases, the potential RCS cooldown and the resulting reactivity transient are less severe and, therefore, the required SHUTDOWN MARGIN also docreases. Below Tm cf about 200*F, the j

inadvertent deboration event becomes limiting with respect to the SHUTDOWN MARGIN requirements. Below 200 F, the specified SHUTDOWN MARGIN ensures that sufficient time for operator actions exists between the initial indication of the deboration and the total loss of j

SHUTDOWN MARGIN. Accordingly, the SHUTDOWN MARGIN requirements are based upon these limiting conditions.

I Additional events considered in establishing requirements on SHUTDOWN MARGIN are single CEA withdrawal and startup of an inactive reactor coolant pump.

If the SHUTDOWN MARGIN reauirements are not met. boration must be initiated immediately. Boration will continue until the SHUTDOWN MARGIN reauirements are met.

in the determination of the reauired combination of boration flow rate and boron concentration. there is no uniaue reauirement that must be satisfied provided the boration source is sufficient to achieve the SHUTDOWN MARGIN. Since it is imperative to raise the boron concentration of the RCS as soon as Dossible the boron concentration should be a hiahly concentrated solution, such as that normally found in the boric acid makeup tanks or the refuelina water storaae pool. The Operator should borate with the best FopLce available for the plant conditions.

Other technical specifications that reference the Specifications on SHUTDOWN MARGIN ARE: 3/4.1.2, BORATION SYSTEMS,3/4.1.3, MOVABLE CONTROL ASSEMBLIES,3/4.9.1, REFUELING OPERATIONS - BORON CONCENTRATION, and 3/4.10.1, SHUTDOWN MARGIN.

WATERFORD - UNIT 3 B 3/4 1-1 AMENDMENT NO. 44

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3/4.1 REACTIVITY CONTROL SYSTEMS BASES 3/4.1.1.3 MODERATOR TEMPERATURE COEFFICIENT The limitations on moderator temperature coefficient (MTC) are provided to ensure that the assumptions used in the accident and transient analysis remain valid th~) ugh each fuel cycle. The E urveillance 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 bumup. The confirmation that the measured MTC value is within its limit provides assurances that the coefficient will be maintained within acceptable values throughout each fuel cycle.

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WATERFORD - UNIT 4 B 3/41-la l

-