ML20092G583

Proposed TS Section 3.4.1.1 Re Boration control,3.4.1.3 Re Control Element Assembly Positions & 3.1.3.5 Re Control Element Assembly Insertion Limit

ML20092G583
Person / Time
Site:	Calvert Cliffs
Issue date:	02/14/1992
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20092G581	List: ML20092G580 ML20092G583
References
NUDOCS 9202200232
Download: ML20092G583 (28)

Text

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A'lTACilMENT_t UNIT 1 SPECIFICATION REVISED PAGES 3/411 3/413 3/4117 3/4118 3/4 1-19 3/4119A 3/4124 Il 3/41 1 113/41-3 113/41-4 Il 3/415 9202200232 920216 PDR ADOCK 05000317 P

PDR

3/4.1 REACTIVITY CONTROL SYSTEMS 3/4.1.1 BORAT10N' CONTROL 0

-SHUTDOWN MARGIN - T

-> 200 F ava LIMITING CONDITION FOR OPERATION 3.1.1.1. The SHUTDOWN MARGIN shall be equal to or greater than the limit line of Figure 3.1-lb.

APPLICABILITY: MODES 1, 2**,

nd 4.

(

ACTION:

WiththeSHUTDOWNMARGINlessthanthelimitlineofFigure3.1-lh7

.immediately initiate and continue boration at 2 40 gpm of 2300 ppm b;oric acid solution or equivalent until the required SHUTDOWN MARGIN is restored.

SURVEILLANCE REOUIREMENTS 4.1.1.1.1 The SHUTDOWN MARGIN shall be determined to be equal to or greater than the lim).

Figure 3.1-lb:

Que a.

Within one our 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 h CEA s + is inoperable, if the inoperable CEA is move e-p untrippable, theaboverequiredSHUTDOWNMARGINshalT1eTncrease amount at least equal to the withdrawn worth of thGeovab

@untrippableCEA(s)+.

W~

8 b.

When in MODES 1 or 2, 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 l

Limits of Specification 3.1.3.6.

c.

When in MODE 2##, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> prior to achieving reactor criticality by verifying that the_ predicted critical CEA_

position + is within the limits of Specification 3.1.3.6.

d' Prior-to initial operation.above SY, RATED THERMAL POWERafter with the CEA gro0ps -at the Transient Insertion Limits )ofeach fuel loa l

Specification 3.1.3.6.

Adherence to Technical Specification 3.1.3.6 as specified in Surveillance. Requirements 4.1.1,1.1 assures that there is sufficient available-shutdown margin to match the shutdown margin requirements of the safety analyses.

See Special Test Exception 3.10.1.

-With K With K,ff r 1 3

e ff < l..

Excluding the 6 nter CEA during Cycle 10.

l

+

CALVERT CLIFFS - UNIT 1 3/4 1-1 Amendment No. 27/JJ//E/7J/EE/

195/J79,151

REACTIVITY CONTROL SYSTEMS 0

SHUTDOWN MARGIN - T,yg i 200 F LIMITING CONDITION FOR OPERATION 3.1.1.2 The SHUTDOWN MARGIN shall be 2 3.0% 6 k/k, & J v ber g%uw lesI ls le4 k<

~ ~ ~)y~

&PfGCABillTY: MODE 5 P

-er--Pres suri ter-A ev e3-t-904hgb es-from-bo t t on-o f-t h emressuri z er.

-and-11 sources o}.f non-borated water, s 88 gpm.JeNeve 2

Pre v

,/

s4.s a

/

ACTION:

_/

~

a.

With the SHUTDOWN MARGIN < 3.0% 6 k/k. immediately initiate and continue boration at 1 40 gpm of 2300 ppm boric acid solution or equivalent until th _ equired SHUTDOWN MARGIN is restored.

4 b.

With the pressurizer drained t X 0 inches and all sources of non borated water > 88 gpm, imnietf ately suspend all operations involving positive reactivity changes while the SHUTDOWN MARGIN is increased to compensate for the additional sources of non-borated water or reduce the sources of non-borated water to 5 88 gpm.

SURVEILLANCE REOUIREMENTS 4.1.1.hhe SHUTDOWN MARGIN shall be determined to be 2 6 k/k:

a.

Within one hour 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 it edC.

• is inoperable.

If the inoperable CEA+ is mmovaEl u

untrippeble, the above required SHUTDOWfRAIIN all be increa (bya amount at least equal to the withdrawn worth of the mmovent untrippable CEA(s)+.

l b.

At ' eastonper 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 burnup based on gross thermal energy generation, 5.

Xenon concentration, and 6.

Samarium concentration.

4.1.1.2.2 With the pressurizer drained to 0 inches determine:

a.

Within one hour and every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter that the level in the reactor coolant system is above the bottom of the hot leg nozzles, and b.

Within one hour and every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter that the sources n( nop-bor[ated_waJt r_ are s 88 ppm.or_ @e_ shutdown margin h o

compensate for the addTtional sources.

( g kud be

(

4 non t,ookJ u:fco-

~,

"7 ~ Excluding the center ~CEA^durliig~ Cyele-10-~"

CALVERT CLIFFS - UNIT 1 3/4 1-3 Amendment No. fhEE,151

1

-REACTIVITY CONTROL SYSTEMS

{ oil M0 E

TROL ASSEMBLIES

( g 4 (&J1 norJL)

K LIMITING 1CONDITIO_W FOR OPERATION 3.1.3.1 The CEA' Motion Inhibit and all shutdown and regulating CEAs+

-shall be OPERABLE with each CEA of a given group positioned within 7.5 inches (indicated position) of all other CEAs in its group.

APPLICABILITY: MODES 1* and 2*

(%Jsirh1 or MM ACTION:

With one or more CEAst(herable due todeingMle as r l

n a.

r4suT&-of-excess 4MvWoiF5Ffhechi44 cal inter-ference w -

kn Mop'abTE be in at lealt10T'5TANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

b.

With the CEA Motion Inhibit inoperable, within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> either:

1.

Restore the CEA Motion Inhibit to-OPERABLE status, or 2.

Phce and-maint,ain-the4EA-drive-systenrmodemittM-e+ther-the 20ff"-or-any " Manual-MadeDritierand]/bily +

Ydraw all CEfs~'in groups 3 and 4 and withdraw the CEAs in group 5 to less than 5% insertion, or 3.

Be-ivatvins} HOT STANDBY.

fr % ILD y WithonNEAinoperable+duetocausesotherthanaddressedby c.

ACTION a, above, and inserted beyond the Long Term Steady State Insertion Limits but within its above specified alignment requirements, operation in MODES I and 2 may continue for up to 7 days _ per occurrence.4th,a4+ al accumulated time of s 14 days per calenda ge Grept onhho.>,}

-d.

With one CEA.inoperibl ue toTauses other than addressed by ACTION a,- above, but within its above specified alignment requirements and either fully withdrawn or within the Long Term Steady State Insertion Limits if in CEA group 5, operation in MODES I and-2 may continue.

See Special Test Exceptions 3.10.2 and 3.10.4.

+

Excluding the center CEA during Cycle 10.

I CALVERT CLIFFS - UNIT 1 3/4 1-17 Amendment No. J/7,151

)

REACTIVITY CONTROL SYSTEMS L11HTING CONDITION FOR OPERATION M M *W ed Wg.&tn cv a ha (cU+ )

p y

With one@"oYiWan[7 finches-4uQless than 15 inch m ' ore C qQalJgnedfromanyotherCEAsinits l

e.

group byfr Qf6)Q@ the misaligned CEA(+ggh)provided thatM operatjon IEMDES'l~ a~nd 2 inay~cintinue rt;

~

4 j,,

ed to-RAB within M specified.

[I.

ntspprPp, / b c-ic /v.% oAwh <'"['d alignment re um i.

,2.

lieclTre~d 16 operable., After decliring the'CEA+ incherable

}\\

f,Mperation'in MODES-1 and 2 maf continue'for up to 7 da T

per occurrence with a total' accumulated time of s 14 days 1

per' calendar,ysar provide'd all of/the following condit. ions

,, a're met /

,/

/

l

/

The THERMAL P' WER level'shall beMeduced to/d 707. of

~

0 a./the maximoin allowabl6 THERMAL, POWE

' -p

/

1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />;if negative reactivjt'y insertion is req /

/

uired to

/

reduce THERMAL' POWER, boration sha 1'be used.

/ required,by a) above[ reducing the) THE

/

b.

Within one hour after the remainder of ti)e'CEAs+,in

/

the group with the,<inoperableAEA+ sha}CEA+ while

/

} be aligned

/

/

to wi,thirt 7.5 inches of thef noperab e' i

maintaining the/ allowable CEA sequen}ce and insertio/

/

f n

lipfits shown ofi Figure 3 I-2; thejiHERMAVPOWER' level shall be restricted purs/uant to Specification 3.1.3.6 during subsequent opera' tion.

p tr%y v chah W.)

f.

With one CEA%, misaligned from any other CEA+ in its group by l

15 inches or more, operation in M00ELlandpay continue, providedthatthemisalignedCEA+isks oneYl within N-1 ksjl3 ng?M4*At! % %*3 M ~ & c~d***~~*

the time all g g s,hown g F g re 3.1-3

-misaligned ff-value-used-to-determine-the-aHuwabie time to realign the CEA+ from Figure 3.1-3 shall be the latest measurement taken l

within 5 days prior to the CEA misalignment.

If no measurements M re~1 ithfii 5'~ days-prio to the misalignment \\ omndua.-ppet _

gned-F -of-l H-bemsumed,

r ommtT m eusn e

g.

With one CEA+ misaligned-ffem-any-other-C4A+ in it+-group by-

,uey, A.ay-3 s_incues or re ta onclusion of the time aliowance 2

(

ggp ) id permitted in mmqdjt4tJQy start to imple ent the b

following actions:

m ceu cW u V) gg ih p MyM /cF'^

1.

If the THERMAL POWER level prior to the misalignment was

, " Vd" greater than 507. of RATED THERMAL POWER, THERMAL POWER shall be reduced to less than the greater of:

+

Excluding the center CEA during Cycle 10.

CALVERT CLIFFS - UNIT 1 3/4 1-18 Amendment No. J27, 151 j

-~~

REACTIVITY CONTROL SYSTEMS LIMITING CONDITION FOR OPERATION a) 50% of RATED THERMAL POWER-b) 75% of the THERMAL POWER level prior to the misalignment jithjn-one-homaf terefceedliig' the ime allowance permitted by (figureg3-g or h.

2.-

If the THERMAL POWER level prior to the misalignment was s 50%

of RATED THERMAL POWER, maintain THERMAL POWER no higher than the value prior to the misalignment.-

If negative reactivity insertion is required to reduce THERMAL POWER, boration shall be used. Within one hour after establishing

-the appropriate THERMAL POWER as requTrep above, either:

il.s 1.

Restore the CEA+ to within the-abwe specified alignment l-requirements, or 2.

Declare the CEA+ inoperable. - After-declaring the CEA

-inoperable, POWER OPERATION may continue for up to-7 days per occurrence with a tslaL-ac<umulatedlim 14 days per

/

lendar year evided the remaitfder of the

'liMiiFYF6uTN Id(C withthejne rable CEA 3reiligned to within7.5 inch,eJ-of~the-Mg inoperable CEA while, maintaining the,aM6wable CE e'quence and inserfionlimits hewn on Figure r1-2; the THE L POWER level 7; g r fiall be res t' ed pursuan pecificati n'3.1.3.6 durin subsequent eration.

e

[ With morpt an one CEA+,Anoperable or mis ligned from~ any other CEA in itpgroup by 15 hes-(indicate 6sition) or more' be in a least HOT STANDBY thin 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.,

/

/

b.

r-thrp es-of performing h operability test, MC t

TS 3. M.I.2-f the CEA has an inoperable position indication

)d.jp channslrth alternate indication system (pulse counter or voltag'e.

[Y.l dividing network) will-be used to monitor position.

If a direct position indication (full out reed switch or voltage-dividing g 4.l.3M-

.. network) cannot_be restored within ten minutes from the commencement I

of CEA motion, or CEA withdrawal exceeds the surveillance testing

/

insertion by > 7.5 inches, the position of the CEA shall be assumed to have-been >.15 inches-from its group at the commencement of CEA motion.

~/

+

Excluding the center CEA during Cycle _10.

t

!I CALVERT CLIFFS - UNIT 1 3/4 1-19 Amendment No. JE/Ef//27,151

t INSERT "A" calendar year provided 1halwithin one hour after declaring the CEA inoperable. the remainder of the CEAs+ in the group with the inoperable CEA ue aligned to within 7.5 inches of the inoperable CEA whileu0 maintaining the allowable CEA sequence and insertion limits shown on Figure 3.12; for a_Legulatine CEA. and with the TilEllMAL POWElt level shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation. or b) maintaini_ng the remainder of the CEAs in a shutdown groun withdrawn to at least 129 inches.

h.

With more than one CEA+ f.regulatinc or shutdown) inopenblo-or-misaligned an_d each misaligned CEA is within 15 inches of fiom any other CEA in its group by 45 inches (indicated position) of-motor-l+4n-et-least-lMY12 HTANIWV-44 thin 44ours-restore the misaliened CEAs to within their specified alignment reauirements within one hour. otherwise immediately declare the misaligned CEAs inoperable and implement Action i. If only ong CEA f regulatinc or shutdown) remains misatiened at the end of one hour. implement Action c.

hi.

With more than one CEA+ (regulating or shutdown) inoperable or with more than one CEA (regulatine or shutdown) misaligned pnd any one or more of the misalipntd CF;As is 15 inches (indicated position) or more from any other CEA in its group, be in at least IlOT STANDl3Y within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

REACTIVITY CONTROL SYSTEMS SMRVEILLANCE REQUIREMENTS 4.1.3.1.1 The position of each CEA+ shall be determined to be within 7.5 inches (indicated position) of all other CEAs in its group at least once per_12 hours except during time intervals _when the Deviation Circuit and/or CEA Motion Inhibit are inoperable,- then verify the -individual CEA positions at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

4.1.3.1.2 Each CEA+ not fully inserted shall be determined to be OPERABLE by inserting it at least 7.5 inches at least once per 31 days.C -

4.1.3.1.3 The CEA Motion Inhibit shall be Jemonstrated OPERABLE at least once per 31 days by a functional test which verifies that the circuit maintains the CEA group overlap and sequencing requirements of Specification 3.1.3.6 and that the circuit also prevents any CEA from being misaligned from all other CEAs in its group by more than 7.5 inches (indicated position) +

p i

]~ AM cr?T fn>m oId AvlOn 5 j

J-

+

Excluding the center CEA during Cycle 10.

1 b

i CALVERT CLIFFS - UNIT-1 3/4 1-19A Amendment No. JJ/, 151

• h.

f REACTIVITY CONTROL SYSTEMS

-SHl1TDOWN CEA INSERTION LIMIT-LIMITING CONDITION FOR OPERATION 3.l'3.5 All-shutdown CEAs shall be withdrawn to at least 129.0 inches.

APPLICABILITY: MODES 1 and 2*f.

rmf%/

ACTION:

,ymx cs)

Witsh xi=Lof ne shutdown CEA fithdrawn, except for surveillance es tJng_pYr su aatitS~3pibi f4WDbF4 1 r3rld,-to-l e ss-t h an429,0

ches,

-w

. 4n-ens hour 45ther~ Con.s dc.- 1he CM a> misal.yncf (r

- a::

Wi t hd r a w-the-0EA-t o-a t-l e a s t-1294_inche &r-e r 4

i

1. m atcd u f et e y

A. _Dachts--the-CEA-inoperable and apply Specification 3.1.3.lje SORVEILLAMCE-REQUIREMENT [ x A

4.1.3.5 Each shutdown CEA shall be determined to be withdrawn to at least 129.0 inches:

a.

Within 15 minutes prior to-withdrawal of any CEAs+ in regulating groups during -an approach to reactor criticality, and 1b.

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.

4 h

See Special Test Exception 3.10.2.

Excludingthe'pcehterCEAduringCycle10.

l ffl 1.n With K

+

CALVERT CLIFFS - t ~~ l 3/4 1-24 Amendment No. /E,151

}/4.1 REACTIVITY CONTROL SYSTEMS

_ BASES 3/4.1.1 BORAT10N CONTROL

'i 3/4.1.1.1 and 3/4.1.1.2 SHUTDOWN MARGIN A sufficient SWTDOWN MRGIN ensures that 1) the reactor can be made subtriti:a1.from all operating conditions, 2) the reactivity transients associated with postulated accident conditions are controllable within accept-able limits, and 3) the reactor will be maintained sufficiently subcritical to preclude inadvertent criticality in the shutdown condition.

The most limiting SHUTDOWN MRGIN requirement at beginning of cycle is determined by the requirements of several transients, including Boron Dilution and 4 team Line Rupture. The SHllTDOWN MARGIN requirements for these transients are relatively small and nearly the same.

However, the most limiting SHUTDOWN MRGIN requirement at end of cycle comes from just one transient, the Steam Line Rupture-event. The requirement for this transient at end of cycle is significantly larger than that for any other event at that time in cycle and, also, considerably larger than the most limiting requirement at beginning of cycle.

'The variation in the most limiting requirement with time in cycle has been incorporated into Technical Specification 3.1.1.1, in the form of a specified SHUTDOWN MARGIN value which varies linearly from beginning to end of cycle. This variation in specified SHlITDOWN MRGIN is conservative relative to the actual variation in the most limiting requirement. Consequently, adherence to Technical Specification 3.1.1.1 provides assurAncf-that-th L available SHUTDOWN MARGIN at anytime' in cycle will exce'if the'most limiting e

f SHUTDOWN MARGIN requirement at that time in cyclg, e g7

,,g

_ Ku_usJs In MODE 5, the reactivity transients resulting from any event are minimal and do not vary significantly during the cycle. Therefore, the specified SHUTDOWN MARGIN in MODE 5 via Technical Specification 3.1.1.2 has been set equal to a constant value which is determined by the requirement of the most limiting. event at'any time during the cycle, i.e., Boron Dilution with the pressurizer level less than 90 inches and the sources of non-borated water restricted. Consequently, adherence to Technical Specification 3.1.1.2 provides assurance that the available SHUTDOWN MARGIN will exceed the most limiting SHUIDOWN M RGIN requirement at any time in cycle.

CALVERT CLIFFS - UNIT I B 3/4 1-1 Amendment No. 27, 32. 48.

11. 18, 105, 130

^

RFACTIVITY CONTROL SYSTEMS o

BASES stable re' activity. condition of the reactor and the additional restrictions prohibiting CORE ALTERATIONS and positive reactivity change in.the event the single injection system becomes inoperable.

0

-The boron capability required below 200 f is based upon-providing a 0

3% Ak/k SHUTDOWN MARGIN after xenon decay and cooldown from P00 F to 0

140 F.

This condition requires either boric acid solution from the boric acid tanks, the requirements of which are met by Specification 3.1.2.7, or 9,844 gallons of 2300 ppm borated water from the refueling water tank.

The OPERABILITY of one boron injection system during REFUELING ensures that this system is available for reactivity control while in

- MODE-6.

~

3/4.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) the potential effects of a CEA ejection accident are limited to acceptable levels.

The ACTION statements which permit limited variations from the basic-requirements -are accompanied byAdditT5niFTesR1ctW which ensure that theoriginal.criteriaaremetfe yAyJgg7 t -

4 v

s-9

~

to a large misalignment (215 inches) of*Two1Fmor$ntMppable CEA and The ACTION statements applicable toLa-srtwk-e*

e CEAs, require a-prompt shutdown of the reactor since either of these conditions may be indicative of a possible }osnf' mech nical functional capability of the

% p u g v "ck er,un n1 ippable CEA, the loss of SHUTDOWN CEAs

"^RGI%~ r surv J -

For small.miTsa ignments (< 15 inches) of the CEAs, there is 1) a l

small degradation in the peaking factors relative to those assumed in generating-LCOs and LSSS setpoints for DNBR and linear heat rate, 2) a

- small effect on the time dependent long term power distributions relative.

- to those used in generating LCOs and LSSS setpoints for DNBR and linear heat rate, 3) a small' effect on-the available SHUTDOWN MARGIN, and 4) a small effect on the ejected CEA worth used in the safety analysis.

Therefore, the ACTION stateme _ associated with the small misalignment of a CEA permits a<6RQour ti val during which attempts may be made to restore the LE 6td withi s

ignment requirements prior to-initiating a reTuction in TH POWER.- The one hour time limit is sufficient to (1) identify causes of a misaligned-CEA, (2) take appropriate corrective action to realign the CEAs and (3) minimize the effects-of xenon redistribution, i

Revised by NRC Letter dated 09/11/91 CALVERT CLIFFS - UNIT 1 B 3/4 1-3 Amendment No. /J//E/JEE/JJ/,

4 c-6-

w.re a-w r

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t

,,_ ~ - (7 s

RE ACTIVITY CONTROL SYSTEMS le,;q7 e reyIrlixI c<.s hdch+ ')

l BASES r

^

Overpower margin is provided to protect the core in' t[e event of a large misalignment ( z 15 inches) of alCEA. However, this misalignment would cause distortion of the core power distribution. The reactor prote,ctive system would not detect the degradation in radial peaking factors and since variations in other system parameters (e.g., pressure and coolant temperature) may not be sufficient to cause trips, it is possible that the reactor could be operating with j

process variables less consetvative than those assumed in generating LCO and LSSS setpoints.

The ACTION statement associated with a large CEA miulignment requires prompt action to realign the CEA to avoid excessis e margin degradation.

If the CEA is not realigned within the given time constraints, action is specified which will preserve margin, including reductions in TIIERMAL POWER.

For a single CEA misalignment, the time allowance to realign the CEA (Figure 3.1-3) is permitted for the following reasons:

L The margin calculations which support the power distribution LCOs for DNBR are based on a steady-state Ff as specified in Technical Specification 3.2.3.

2.

When the actual F[is less than the Technical Specification value, additional margin exists.

3.

This additional margin can be credited to offset the increase in F[

with time that will occur following a CEA miulignment due to xenon M' dis'tr'iBb 'on.

Q.TNSM r KU

-The-requirement to reduce power level after the time limit of Figure 3.1-3 is reached offsets the continuing increase in F[ that can occur due to menon redistribution. A power reduction is not required below 50% power. Below $0%

power there is sufficient conservatism in the DNB power distribution LCOs to completely offset any, or any additional, xenon redistribution effects, The ACTION statements applicable to miuligned or inoperable CEAs include requirements to align the OPERAllLE CEAs in a given group with the inoperable CEA. Conformance with these alignment requiremenu bring the core, within a short period of time, to a configuration consistent with that assumed in generating LCO and LSSS serpoints.

However, extended operation with CEAs significantly inser:ed in the core may lead to perturbations in 1) local burnup,

2) peaking factors, and 3) available shutdown margin which are more adverse than the conditions ="mai to exist in the safety analyses and LCO and LSSS setpoints determination. Therefore, time limits have been imposed on operation with inoperable CEAs to preclude such adverse conditions from developing,

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CmuscRT y'-

y-a 3

CALVERT CLIFFS - UNIT 1 B 3/4 1-4 Amendment No. H. W.127

RE ACTIVITY CONTROL SYSTEA15 ILiSES Operability of the CEA position indicators is required to determine CEA positions and thereby ensure cornpliance with the CEA aligntuent and insertion limits and ensures proper operation of the rod block circuit.

The CEA ' Full In" and ' Full Out* limits provide an additional independent means for determining the CEA positions when the CEAs are at either their fully inserted or fully withdrawn positions.

Therefore, the OPEllABILITY and the ACTION statements applicable to inoperable CEA position indicators permit continued operations when positions of CEAs with inoperable indstators can be verified by the " Full In* or ' Full Out' limits.

CEA positions and OPERAlllLITY of the CEA indicators are on a nominal basis of once per, position required to be verified 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with more frequent verifications required if an automati: monitoring channel is inoperable.

These verification frequen:les are adequate for assuring that the applicable LCOs are satisfied.

The surveillance requirements affecting CEAs with inoperable position indication channels allow 10 minutes for testing each affected CEA. This time limit was selected so that 1) the time would be long enough,,for the required testing, and 2) if all indication were lost during testing, the time enous(positiontohllowqa power reduction ta%0Vfihrdaxim would be short thermal power withiit %hijo4rgirom when the testing'was initiated.

The time limit ensures CEA r$1salignments o: curring during CEA testing are corre:ted within the time requiremenu ttquired by existing specifications.

The maximum CEA drop time restriction is consistent with the assumed CEA drop time used in the safety analyses, Measurement with T

> 515'F and with all reactor coolant pumps operating ensures that the Esiired drop times will be representative of insertion times experienced during a reactor trip at operating conditions.

.The LSSS setpoints and the power distribution LCOs were generated based upon a core burnup which would be achieved with the core operating in an essentially unrodded configuration. Therefore, the CEA insertion limit specifications require that during MODES 1 and 2, the full length CEAs be nearly fully withdrawn. The amount of CEA insertion pennitted by the Steady State Insertion Limits of Specification 3.1.3,6 will not have a significant effect upon the unrodded burnup assumption but will still provide sufficient reactivity control. The Transient Insertion Limits of Specification 3.1.3.6 are provided to ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) the potential effects of a CEA ejection accident are limited to acceptable levels; however, long term operation at these insertion limits could have adverse effects on core power distribution during subsequent operation in an unrodded configuration.

CALVERT CLIFFS - UNIT 1 B 3/4 1-5 Amendment No. U,127

-.- ~. _ _

. r; l

INSERT "B" Without tiie specified SilUTDOWN MARGIN available, immediate horation is required (by Specifications 3/4.1.1.1 or 3/4.1.1.2) that is at least equivalent to boration from the refueling water tank, at its minimum boric acid concentiation, via a charging pump, at its minimum flow rate. For example, lower flow rates with higher borie acid concentrations could also provide the equivalent boration, but should be verified as equivalent prior to use.

i i

INSERT *C" A regulating or shutdown CEA is considered to be misaligned if it is more than 7.5" from any other CEA in its group, however, a shutdown CEA is also considered to be misaligned if it is withdrawn to less than 129" even if it is within 7.5" of all other CEAs in its group. For the purposes of the Technical Specifications, a dual assembly, connected to a single CEA drive mechanism, is considered to be a single CEA (e.g., dual shutdown CEAs connected to a single drive mechanism).

INSERT "D" A CEA is considered untrippable when it is known that the CEA would not be insertable in response to a Reactor Protection System signal or is known to be immovable due to excessive friction or mechanicalinterference.

INSERT "E" 4,

If an FrT measurement has not been taken recently (within 5 days), a pre. misaligned value of 1,70 is assumed and no time for realignment is permitted.

INSERT "F" There are five different operating. modes for control of-CEAs; Off, Manual Individual, Manual' Group, Manual Sequential and Automatic. The Manual Sequential mode is applicable to only the regulating CEAs and the Automatic mode is disabled and not used for both regulating and shutdown CEAs.

=.

ATTACHMENT 2 UNIT 2 SPECIFICATION REVISED PAGES I

3/411 3/413

-i 3/4117 3/4118-

-3/4119-3/4119A l

3/4124 B 3/411 B 3/413 B 3/414 B 3/415-J

3/4.1 REACTIVITY CONTROL SYSTEMS

)

3/4.1.1 BORATION CONTROL SRVIDOWN MARGIN - Tava

> 200*F LIMITING CONDITION FOR OPERATION 3.1.1.1 The SHUTDOWN MARGIN shall be equal to or greater than the limit line of Figure 3.1-lb.

APPLICABILITY:

MODES 1.2**,Jand4.

ACTION:

[

With the SHUTDOWN MARGIN less than the limit line of Figure 3.1-lb, l

immediately initiate and continue boration at 140 gpm of 2300 ppm boric acid solution or equivalent until the required SHUTDOWN MARGIN is restored.

SURVEILLANCE RE0VIREMENTS 4.1.1.1.1 The SHUTDOWN MARGIN shall be determined to be equal to or greater than the limit-line of Figure 3.1-lb:

a.

Within one hour after detection of an inoperable CEA(s) and at least once per 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> t4sreafe&AletheCEA(s)isinoperable.

If the inoperable CEA 1 i=0ml; cy ntrippable, the above required SHUTDOWN MARGIN sh T6eTincre sejb amount at least equal to the withdrawn worth of the 4mova4.

untrippable CEA(s).

t b.

When in MODES 1 or 2, 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", within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> prior to achieving reactor criti-

.c.

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

d.

-Prior to -initial operation above 5f, RATED THERMAL POWER after each fuel loading, by consideration of the factors of (e) below, with the CEA groups-at the Transient Insertion Limits of Specification 3 l.3.6.

Adherence to-Technical Specification 3.1.3.6 as specified in Surveillance Requirements 4.l.1.1.1 assures that there is sufficient available shut-down. margin'to match the shutdown margin requirements of the safety analyses.

See Special Test Exception 3.10.1.

With K 1.0.

With K,eff >

ff <

l.0.

.-f~

t -

CALVERT CLIFFS - UNIT 2 3/4 1-1 Amendment No.RD,JpB,123

REACTIVITY CONTROL SYSTEMS SHUT 00WN MARGIN - Tava 1 200 F LIMITING CONDITION FOR OPERATION e

~.

3.1.1. 2 t

- TD04 JtARGIN shall be > 3.0% ak/k po) v4n luud/w /*/ i a-22.LMc{

I

,. s APPL

~ ~

J -a._ P-r4Hw4er-4evel ; 90-4*ehes-f.com bottom Sthe--pressurtzer. /)

~ - -

b.

Prq11ttriteder 0 inches from bottom of the pressurizer,4*d a) s urces of non-borated water < 88 gpm.

j W

lokT N

d W

-~ #

a.

With the SHUTDOWN MARGIN < 3.0t Ak/k, immediately initiate and continue boration at > 40 gpm of 2300 ppm boric acid solution or equivalent until

~

the required SHUTDOWN MARGIN is re. stored.

4 b.

With the pressurizer drained t >

0 inches and all sources of non-borated water > 88 gpm, iumedia y suspend all operations involving positive reactivity changes while the SHUTDOWN MARGIN is increased to compensate for the additional sources of non-borated water or reduce the sources of non-borated water to 188 gpm.

SURVEILLANCE REQUIREMENTS 4.I.lk2.1heSHUTDOWNMARGINshallbedeterminedtobe>3.0%ok/k:

}

a.

Within one hour after detection of an inoperable CEA(s) and at ll least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereaffterw le the CEA(s) is inoperable.

i' If the inoperable CEA is etri untrippable, the above

.' f required SHUTDOWN MARGIN Tha 7 07 n;rea4ed 4y-amount at least _

j equal to the withdrawn worth of theC,4,mmovab4 untrippable CEA(s).

wa b.

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 everage temperature, 4.

Fuel burnup based on gross thermal energy generation, i

5.

Xenon concentration, and 6.

Samarium concentration, f

i

(<

'4.1.1 2.2.

With the pressurizer drained tc(

0 inches determine:

3.

Within one hour and every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereaf ter that the level 6 e, in the reactor coolant syst'em is above the bottom of the Il hot leg nozzles, and i

b.

Within one hour and every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter that the sources i

q zn M 2d--* of non-borcompensath for the additTo 6fsTu?ces tjhu.

ed water are < 88 gpm orJh_

'E Y5.

F5 --UNIT T 3/4 1s' o;f b.cs ygg CALVERT CLIFFS - UNIT 2 Amendment No. X123

?

e

< c, j

RE ACTIVITY CONTROL-SYSTEMS -

y% %(ONTROL ASSEMBLIES 3 /4.1.3 MOVABLE (fA POSITQQ MI N ON ITION FOR OPER ATION 3.1.3.1 - The CEA Motion Inhibit and all shutdown and regulating CEAs shall be OPERABLE.with each CEA of a given group positioned within 7.5 inches (indicated position) of all other CEAs in its group.

APPLICABILITY: MODES l' and 2* y^vGm d

1. ' 5 b"

1. f#bjf ACTION:

[

p y,_ _,y

.J g _, 7 v~

Wilh one or_Inore - C A noperable due to beingGinmovable-as-a-tesult'j g

a. -

(Mices;sivdfiliition-or 7m dh'ariisa'Finstference-e7 f

~

kne i. te ^ be-

-untrippstiie7Te in at 1easi~110TTSTANDB within fhouis b.

With the CEA Motion Inhibit inoperable, within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> either:

1.

Restore the CEA Motion Inhibit to-OPERABLE status, or 2.

.Placoand-maintain-t he-G EA-drive-system-m JtthWn-either=shed fC-or-any- 'atanual Alodv-position-a_

lly withdraw all CEAs in groups 3 and 4-and with3 raw the CEAS in group 5 to less than 5% insertion, or 3.

Be in ic '

T STANDBY.

r< ataM c.

With one* CEA perable due to.causes other than addressed by ACTION a, above, snd inserted beyond the Long Term Steady State Insertion Limits but vithin its above specified alignment requirements, operation-in MODES I and 2 may continue for up to 7. days per occurrence with a ot$aqum.ulatedf@meqf_< 14 days per calendar

. year.

A p, d

-)

~

.a-x-

d.

With one CE n6.perable due to causes other than addressed by ACTION a,

above, but within its above specified alignment requirements and ' either fully. withdrawn or within the Lon8 Term.

Steady State Insertion Limits if in CEA group 5, operation in MODES I and. 2 may continue.

See Special Test Exceptions 3.10.2 and 3.10.4.

CALVERT CLIFFS - UNIT 2 3/4 1-17 Amendment No. 109 123

7 REACTIVITY CONTROL SYSTEM 1 CO Y 'd (IMITINGCONDITIONFOROPERATIO Con b*d -)

'd ~Tm e.

Wilh one ee-eer/ CEAs m3, less than 15 inches a

yy.<tet..y o siwh M )

^

h a

mece=thn:M4mh:: b

}

and 2 may continue, provided that *HMn-one-hour the misaligned J

CEA-is +4then-Q R'

l'.

$ estored to-OPERABEEntstes within its above-specified

/

alignment requirements er.f.L,og.v he;~ca+4wse,96,,/ r 6c Qgh j

w.

~w p

U Mc'1rpVd1rioppBle.

ATtFdec)aring tr occd'rrence fith a t06 nd 2 may/ continue'ye CE operation infMODES 1 a for up t,6 7 days pef 1 accupulated time of 1 J4 days per/ k calendar year provided all of the following conditions re f

l

,7

/ a/

The THERMAL POWER level shall be,teduced to/s 70% of the, maximum allowable' THERMAL POWER level r the

/

/

existing Rpictor Coolant Pump c'ombinatio within one

/j' b'our; if negative reactivity ('nsertion required J

/to redufe THERMAL / POWER, bo [ tion shal )be used, Within/one hour /after redy ing the T ERMAL POW e

t b.

/

'/

required by (h)the inopprable CEA shall be align a above, tpe remainder of the (CAs in tr}e' group wit to within 7 3 inches of the inophable CEywhi%

/

/maintainin!the allow ble CEA syquence and '.n

/ -limits she'wn on Figu 3.1-2; the THfRW NWER, j

level shall be rest cted purs46ni to @ecific4 tion /

3 1.3.6' iri su requent op htion.

[

y f.

With one CE N a" M 6 M serCEAinitsgroupby15 inches s

w i

h-97 %

'r~m-a-w+

the time a owancheterm'Tn'iidM 7$$dN -

Better hape fion System (BASSS or, if the BASSS time 3(@# ""h, allowance is unavailable, the time allowanc)e shown in Figure 3.1-3 L

rq If Figure 3.1 3 is used, the pre misaligned FJ value used to 3

.!r y. 4 h

• _f

_ determine the allowable-time to realign the CEA from Figure 3.1-3

@p p misalignmet.q.pnocmeasuremedtswre~taken.-within&dlys'p

,u, 3 TEDiiisali nment, a-pra44*Hsned g cf '.70ahe11 M es5umes to W

jft;4, )9 h.)

Imh*cd ion f.

p"f.

With one CEA mtsaligned from-any-othee+EA ar_more. at the conclusion of the -permit.ted time allowance #fimmedi-ately gtAgt-(he follog dp 1-If the THERMAL POWER level-prior to the misalignment was greater than 50% of RATED THERMAL POWER, THERMAL POWER shall be reduced to less than the greater of:,, A,-cy ule b & A h k

'notf,aih(ybcNhly -J gjaaerne.h "y

CALVERT CLIFFS - UNIT 2 3/4 1-13

'-Amendment'NOT J&tfi

\\

~,

~

.. - - -. - - ~

REACTIVITY CONTROL SYSTEML LIMITING CONDITION FOR OPERATION a) 50% of RATED THERMAL POWER b) 75% of the THERMAL POWER level prior to the misagnt.

w

-pum allowanc wa ll0 by bl.0v c sm>v, I o< h.

yf ~ ~_ <~

a a 2.

If the THERMAL POWER level prior to the misalignment was s 50% of RATED THERMAL POWER, maintain THERMAL POWER no higher than the value -

prior _ to the misalignment.

If negative reactivity insertion is required to reduce THERMAL POWER, boration_shall be used. Within one-hour after establishing the appropriate THERMAL POWER as requir d above, either:

1. -

Restore the CEA to within. h above pecified alignment requirements, or-v 2.

-Declare the CEA inoperable. After declaring the CEA inoperable, POWER OPERATION may continue for up to 7 days per occurrence with a

-( kp!M -

. total accumulated time of s-14 days _ per/ cal ndar y providedthe]

^

,{fesainc"of-tnef CtAl~T the gr p wi th inope le CE dre /

J uh __

align to wit n-7.5 nches o the nope able C whil maintytning l

Egjge7 %,; the lowabl EA s uence a ins rtio limit show n Figpfe N I ~~ j 'S.1 d

the-ERMAL OWER le el s 11'b restr cted rsuanyto

/,\\

S cifica on 3. 43.6 dur ng s sequ t ope tion

-['

d more t ' n one A ino rably or_mi align d fr-any her C in its gr p by J-inche (indi ted pgsitiory or, re, in 4 least OT S NDBY jfi thin hours /

/

/

/

o,t<-Fo[thepu ses of performing the CEA operability test;b5 TS-4.1 T N.

L if the CEA has an inoperable position indication channel, the alternate

}

indication system (pulse counter or~ voltage dividing. network) will be g b3,ch, used to monitor position.

If a direct position indication (full out reed switch or voltage dividing network) cannot be restored within ten minutes

[

i l

sM.UAL from the commencement of CEA motion,' or CEA withdrawal exceeds the

/

\\

surveill'ance testing insertion by > 7.5 inches, the position _ of the CEA.-

c:211 be assumed to have been > 15 inches from its group at the commencement of CEA motion.

/

d CALVERT CLIFFS - UNIT 2 3/4 1-19 Amendment No. E,#7,JES,123

1.--

~

INSERT"A" calendar year provided that within one hour after declarine the CEA inonerable. the remainder of the CEAs+ in the group with the inoperable CEA are aligned to within-7.5 inches of the inoperable CEA whileud maintaining the allowable CEA sequence and-insertion limits shown on Figure 3.12: for a reculatine CEA.-and with the-TilERMAL POWER level shalWe restricted pursuant to Specification 3.1.3.6 during subsequent operation. or b) maintainine the remainder of thp_C5?As in a shutdown croun withdrawn to at least 129 inches.

h.

With more than one CEA+ (reculatine or shutdown) inoperable or-misaligned and each misalicned CEA is within 15 inches of from any other CEA in its group by-45-inches' (indicated position) or-more -be--in-44-4 east-HOT--STANMV-within 6-heurs-restore the r

misaliened CEAs to within their specified alienment requirements within one hour. Otherwise immediately declare the misaliened CEAs inocerable and implement Action 1. If only one CEA (reculatine or shutdown) remains misalicned at the end of one hour. implement Actiop_g.

hl. _

With more than one CEA+ (reculatine or shutdown) inoperable or with more than one CEA (reculatinc or shutdown) misaligned and any one or more of the misaliened CEAs is 15 inches (indicated msition) or more from any other CEA in its group, be in at least HOT STANDBY within 61ours.

_.. -... - - _, -. -. - -. - ~.. -.

~... -.. - - - -. - ~

J t

4 54 REACTIVITY CONTROL SYSTEMS SURVEILLANCE REOUIREMENTS 4.1.3.1.1 The position of each CEA shall be determined to be within 7.5 inches l

. (indicated position) of= all other CEAs in its group at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> except-during _ time intervals when the Deviation Circuit and/or CEA Motion Inhibit are inoperable, ;then verify the individual CEA positions at least once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

~ r 4.1.3.1.2. Each CEA not fully inserted shall be determined ~ tFbe OPERABLE by inserting it at least 7.5 inches at least once per 31 day %#

s9 s%'5E// T cd A-hon C.

%r 4.1.3.1.3 The CEA Motion inhibit shall be. demonstrated OPERABLE st least once per 31 days by a functional test which verifies that the circuit maintains the CEA - group overlap and sequencing requirements of. Specification 3.1.3.6 and that the circuit also prevents any CEA from being misaligned from all other CEAs in its group by more than 7.5 inches (indicated position),

o CALVERT CLIFFS - UNIT 2 3 /4 1-19 A Amendment No. 109 123

4 REACTIVITY CONTROL SYSTEMS SHUTDOWN CEA INSERTION LIMIT LIMITING CONDITION FOR OPERATION 3.1.3.5 All shutdown CEAs shall be withdrawn to at least 129.0 inches.

l APPLICABILITY:

MODES 1 and 2*#.

fv ACTION:l fo_r mon With one shutdown CEA'withdrawnuextgpt for surygillance test ng pursugn r$pecifi~c1 tion 1TriZ to lesYtha_n 129.0-inches.

I witMn mn4Wun-sithem cona/dce Hw GC4co neu a6p,c.6

.-a,--W ithdraw-the-GEA-toe t-le art-129miRh e s or l

q g immedine7i s

-t.

Doc 4 ace--the CEa inoperat>le-and apply Specification 3.1.3.l'y

/\\c kon e, { h or 5, as epyrofcMc.

d '

~-

~

y

. SURVEILLANCE REOUIREMENTS 4.1.3.5 Each shutdown CEA shall be determined to' be withdrawn to at least 129.0 inches:

I a.-

Within 15 minutes prior to withdrawal of any CEAs in regulat-ing groups during an approach to reactor criticality, and b.

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.

'See Special Test Exception 3.10.2.

• With K,ff > 1.p',

(,n-

,m,/

/

[

/s

(' Jaendment J4o. 2S =

( -GALVEAbif f$rUru i i y

-dALVERT-Ct IFFS-UNIT-2 '

3/4 1-24

'RAmendment No.13--123 i

i m

_ ~_

n L

3/4.1 REACTIVITY CONTROL-SYSTEMS

]BSES 3/4.1.1-- BORATION CONTROL 3/4.1.1.1 and 3/4.1.1.2 SHUTDOWN MArQ.M A sufficient SHUTDOWN MARGIN ensures that 1) the reactor can be made subcritical from all operating conditions, 2) the reactivity transients associated with postulated accident conditions are controllable within ac-ce> table limits, and 3) the reactor will be maintained sufficiently suscritical' to preclude inadvertent criticality in-the-shutdown condition.

The most limiting-SHUTDOWN MARGIN requirement at beginning of cycle is determined by the requirements of several transients, including Boron Dilution and Steam Line Rupture. -The SHUTDOWN MARGIN requirements for these-transients are relatively small and nearly the same. However, the most limiting SHUTDOWN MARGIN requirement-at end of cycle comes from just one transient, the Steam

-Line Rupture event.- The requirement for this transient-at end of cycle-is significantly larger than that for any other event at that time in cycle and,

.also, considerably larger than the most limiting requirement at beginning of cycle.

~

The variation in the most limiting requirement with time in cycle has been-incorporated into Technical Specification 3.1.1.1, in the form of a

!,pecified SHUTDOWN MARGIN value which varies linearly from beginning to end of cycle.

This-variation-in-specified SHUTDOWN MARGIN is conservative relative to the actual variation.in the most limiting requirement. Consequently,-

adherence to Technical Specification -3.1.1.1 provides assurance that the available SHUTDOWN MARGIN at any time in cycle will exceed.the40skljn!!ti g SHUTDOWN MARGIN requirement at that time in cycle, ggg. g +

vCN In MODE 5, the reactivity. transients-resulting from any event are minimal and do-not vary significantly during the cycle.

Therefore, the specified SHUTDOWN MARGIN in MODE 5 via Technical Specification 3.1.1.2 has been set equal to a constant value which is determined by the requirement of the most

-limiting event:at any time during the cycle, i.e., Boron Dilution with the pressurizer level less than 9011nches and:the sources of non-borated water restricted.

Consequently, adherence to Technical Specification 3.1.1.2 provides assurance that the available: SHUTDOWN MARGIN will exceed the most

'4miting SHUTDOWN MARGIN-requirement at any time in cycle.

4

/7

'k CALVERT' CLIFFS-UNIQ~TJ B 3/4 1-1 Amendment No. JJ///E//77, EE//Jpf,123

EEACTIVITY CONTROL SYSTEMS BASES stable reactivity condition of the reactor and the additional-restrictions prohibiting CORE ALTERATIONS and positive reactivity change in the event the single injection system becomes inoperable.

0 The boron capability required below 200 F is based upon providing a 0

3% Ak/k SHUTDOWN MARGIN after xenon decay and cooldown from 200 F to 140 F.

This condition requires either boric acid solution from the boric acid tanks, the requirements of which are met by Specification 3.1.2.7, or 9,844 gallons of 2300 ppm borated water from the refueling water tank.

The OPERABILITY of one boron injection system during REFUELING ensures that this system is available for reactivity control while in MODE 6.

3/4.1.3 MOVABLE CONTROL ASSEMBLIES The specifications of this section ensure that (1) acceptable power distribution limits are maintained, (2) the minimum SHUTDOWN MARGIN is maintained, and (3) the potential effects of a CEA ejection accident are limited to acceptable levels.

The ACTION statements which permit limited variations from the basic requirements are accompanied by additional ~ restrictions which ensure that the original criteria are met.4j~fMS4/PT "C " Q

,_ j~

The ACTION statements applicable to

_ untrippable CEA and to a large misalignment (> 15 inches) of Tn or mo'rTEEAs, require a prompt shutdown of the reactor since either of these conditions may be indicative of a possible loss of mechanical functional capability of the CEAs and imihe-ovent ofW4tE5K4rDntrippable CEA, the loss of SHUTDOWN MARGIN.epEtuufrr (,3 f For small misalignments (< 15 inches) of the CEAs, there is 1) a l

small degradation in the peaking factors relative to those assumed in generating LCOs and LSSS setpoints for DNBT. and linear heat rate, 2) a small effect on the time dependent long term power distributions relative to those used in generating LCOs and LSSS setpoints for DNBR and linear heat rate, 3) a small effect on the available SHUTDOWN MARGIN, and 4) a small effect on the ejected CEA worth used in the safety analysis.

Therefore, the ACTION statement associated with the small misalignment of to restore the(CE#y)our time [Cs'ht rval during which attempts may be made a CEA permits a ons t'b within@

lignment requirements prior to initiating a redudtion in THERMA POWER.

The one hour time limit is sufficient to (1) identify causes of a misaligned CEA, (2) take appropriate corrective action to realign the CEAs and (3) minimize the effects of xenon redistribution.

Revised by NRC Letter dated 09/11/91 CALVERT CLIFFS - UNIT 2 B 3/4 1-3 Amendment No. E/JJ/J99/JJJ,

e I

vm_

REACTIVITY CONTROL SYSTEMS BASES

/,

Overpower margin is provided to protect the core in the event of a large g

misalignment (215 inches) of a CEA.

However, this misalignment would cause distortion of the core power distribution.

The reactor protective system would not detect the degradation in radial peaking factors and since varia-tions in other system paramettrs (e.g., pressure and coolant temperature) may.

not be sufficient to cause trips, it is possible that the reactor could be operating with process variables le>;, conservative than those assumed in generating LCO and LSSS setpoints. The ACTION statement associated with a large CEA misalignment requires prompt action to realign the CEA to avoid excessive margin degradation.

If the CEA is not realigned within the given time constraints, action is specified which will preserve margin, including reductions in THERMAL POWER.

for a single CEA misalignment, the time allowance to realign the CEA (Figure 3.1-3 or as determined by BASSS) is permitted for the-following reasons:

1.

-The margin-calculations which support the power distribution LCOs forDNBRarebasedonasteadystateF;asspecifiedinTechnical Specification 3.2.3.

2.

When the actual FT is less than the Technical Specification value, accitional cargin exists.

3.

TQis additional margin can be credited to offset the' increase in F with time that will occur following a CEA misalignment due to

/VM/? T [n"qhon redistribution.

x

)

~The ret irement to reduce power level after the time limit of Figure 3.1-3 or the tire limit determined by BASSS is reached offsets the continuing increaseinFldbelow50% power.

that can occur due to xenon redistribution.

A power reduction is not require Below 50W power there is sufficient conservatisiin the DNB power distribution LCOs to completely offset any, or any additienal. XE9:n redistribution effects.

The ACTION statements applicable to misaligned or inoperable CEAs include recuirements to align the OPERABLE CEAs in a given group with the inoperable CEA.

Conferman:e with these alignment requirements bring the core, within a short perioc of time, to a-configuration consistent with that assumed in generating LCO and LSSS setpoints.

However, extended operation with CEAs significantly inserted in the core may lead to perturbations in 1) local burnup, 2) peaking factors, and 3) available shutdown margin which are more adverse than the conditions assumed to exist in the safety analyses and LC0 and LSSS setroints cetermination.

Therefore, time lirits have been imposed on operation witn inoperable CEAs to preclude such adverse conditions from

. developing % < ~

gw f [CSER 7 f'

O g

xy CALVERT CLIFFS - L";F 2 8 3/4 1-4 Amendment No. f7,JJ, JM,123

I Fr AcTivtry co'mr01 snTrus IMSES s,

Opera bility of the CEA petition indicators is required to determint CEA positions and thereby ensur compliance with the CEA alignment and instruon littu and ensures proper operation of the rod block circuit.

3 The CIA. 'Futi 1:.'

and ' Full Out' liraits provide an additional independent merm for cettrmining the CEA psithns when the CEA are at either their fully in'serted er fuld, withdrawn positions.

Th.+refore, the OPERAlllLITY and the ACTION state nenu appF:stle to inoperable CEA position indi:sters permit recticued operations when positions of CEA> with iceperable iodsentors can be verified by the 'Tu:: In' or ' Full Oct' hmits.

CEA p:shions and OPERAlllLITY ef the CEA position indi:stors are re:ulted t; te verifie d on a e:minal basis of once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> with more frenutta verift:stt;ns reavited if an autornati: Inonitoring channel is inoperable.

Thett s trifi:stien fit 09te:its ate ade:uate for a!surict that the appli:abit LCO tre sati:hei Trit surveillan;e re:uirements affecting CEAs with inererat;e positice.

nci:sti:: ch::ted a ;ow 10 minutes for tetucg ea:h affe:ted CEA. This uce helt waf stie:ted so that 1) the ume would be long enough for tne re:uired temng, and 2; if (1) pesioon indi:stien were lost durir time 1: 406(g 4etuts, the wcu!d te sh:rt enough F llow a power redu:Oct A

6uimum allowabit intrma; tower within' N 3:ur item when the testics wt.s itiunted f

The time W.it e:.sarts CE A t$1512 gneetts o::grrier during CE A.

tesung are corre:tti s'ini: the u=e reauiremenu re:uired b existing set:ift:ati:n:

(

Tr.e mui=um CEA crcp u=e restr;:uct a consistent witn tr.t a.stumed CEA v:: ta:ne used in the a :icent analysts. Measurements with Tavs t 5150 and ar. ret: tor coolant psmps operating ensures that the t'elsure:

• PB cr0; tir*es Will

e re resent!.tive tf use-ti:t times experienced cucin; e rea:t:- trip at

4 stir; :entit;on:,.

Int LS$5 set;cints ar.d tne Doaer districuti:n LCC's were generate:

ta;ts t. Pen e : ore burnup niet wovid pe achieved v.itt tne ::rn operatin;

• n er, esstrtialij unrodoed configuratica..

Therefcre, tne CIA insertion

'iH t s:e:i'i:t:10*s re:uire inet during CI*

• an: 2, the fu.

Tengtn

E'

: n r e t - b f. 'i i.s M tt:rawn.

Ine a'tount of CEA insertien terv.ittec

y 19e 5:st:y 5tatt Irsertion Limits of.50e:ification 3.1.2.6 will not

. ave a si

till prov;nifi:ent eff e:t up;n tne unredded burnup essur;ticn but will ice suffi:ient rea:tivity contrel.

Tne Transient 115ertier iH t: c' Spe:if t:stic. 2.1.2.i ere cronice:

ensure tnat (1) acceptable ce :tst-ioutien limits are r nintained, (2) the minimut ShJTD%%

W.*aM is maintained, and (3) t' r potential effe:t: cf a CE' ejection

icent ere limite: to a::ecta:ie levels; however, long terr. operation

t tatse insertit* limits could have acverse effe:ts en core power i

distri:Jt3:*, curtn; sa:$e:uent orerati:* ir en unroc:e: 001 figuration.

MLVERT. 01.1775 - L'MT :

Ii 3.; :- 5

\\ me n::= t t t N W 10f '::

L a,

t i

INS!!RT ll' Without the specified SilVTDOWN MAltGIN available, immediate boration is required (by Specifications 3/4.1,1.1 or 3/4.1.1.2) that is at least equivalent to boration from the refueling water tank, at its minimum loric acid concentration, via a (harging pump, at its minimum flow rate. For example, lower flow rates with higher boric acid concentrations could also provide the equivalent boration, but should be verified as equivalent prior to use, t

1 INSERT *C" i

r A regulating or shutdown CEA is considered to be misaligned if it is more than 7.5" from any odier CEA in its group, however, a shutdown CEA is also considered to be misaligned if it is withdrawn to less than 129" even if it is within 7.$" of all other CEAs in its group. For the pur soses of the Technical Specifications,1, Aal assembly, connected to a single CEA drive mechanism, s considered to be a single CEA (e.g., du,a shutdown CEAs connected to a single drive mechanism).

INSERT *D*

A CEA is considered untrippable when it is known that the CEA would not oc inscriable in response to a Reactor Protection System signal or is known to be immovable due to excessive friction or mechanicalinterference.

i INSERT"E" 4.

If an F,T measurement has not been taken recently (within 5 days), a pre misaligned value of 1.70 is assumed and no time for realignment is permitted.

INSERT 'F" r

There are five different operating modes for control of CEAs; Off, Manual Individual, Manual Manual Sequential and Automatic. The Manual Sequential mode is applicable to only the Group,ing CHAs and the Automatic mode is disabled and not used for both regu regulat CEAs.

i h