ML20072H157

Proposed Tech Spec Pp 3/4 1-19,3/4 1-22 & B 3/4 1-4 Re Reactivity Control Sys

ML20072H157
Person / Time
Site:	Calvert Cliffs
Issue date:	03/15/1983
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20072H147	List: ML20072H145 ML20072H157
References
NUDOCS 8303290304
Download: ML20072H157 (6)

Text

. )

.+.V - .

I!; r..y T. *.*st:* .v. wn"u r.r'd-

=.

.e. v. .C.T. 7..t e.t.

LIMITINC- C0iOIT20N TDR 00 ERAT!DN f'

i

2. Declare the CEA inoperable. Af ter declar.ing the CEA inoperabie, POWEF. OPERATION may con:inue for up to 7 days per occurrence with a total accumulated time of < If -

days per calendar year provided the remainder of the CEAs in the grouc with the inoperable CEA are" alicned te within 7.E inches of the inoperabie CEA while maintainitrg j .the allowable CEA secuence and inser:icn-i4mie.s.-shown on - - . . .

Figure 3.1-2; the THERMAL POWER levei shall be restricted .'

pursuant to Specification 3.1.3.E during subsecuent o pera t i on .

l

c. With more dhan one full length CEA inoperable or T::isaligned from any other CE.1 in its troup by 15 inches (indicated posi-tion) or more, be in a least a least HOT STANDEY--within E hours. ,

TUr?/EILLANCE REDDIED'ENTS _.. .

1 1

i "

L .i . 3.1. ) Tne position cf each feil length CEA shall be dete cined to' be within 7.5 inches (incica ec position) of ali c:her CEAs in its group a: ieas 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 wnen the Deviatier.

Circui . and/or CEA Mo: ion Inhibi: are inoperatie, then verify tne individuti CEA petitions at _iear once oct 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. -

P 4.1.3.1.2 Each full length CEA not fully inserted shall be determined to be -

OPERABLE by inserting it at least 7.5 inches at least once per 31 days. If the .

CEA has an inoperable position indication channel, the alternate indication system (pulse counter or voltage dividing network) will be used to monitor positon. If a direct position indication (f ull out reed switch or voltage dividing network) cannot be restored within ten minutes from the commencement of CEA motion, or CEA withdrawal exceeds the surveillance testing insertion by '> :S inches the position of the CEA shall be assumed to have been > 15 inches from its group at the commencement of CEA motion and the applicable actions of T.S. 3.1.3.1 shall be taken.

4. i . 3.1. 2 The CEA Mction Inhibit shall be demonstra:ec OpEEf.3LE at es; which verines :nt: the leas once per 31 days by a func;iona1 ,

circui; maintains : e CEA group overiap and secuencine re:;Uitements c7 the circu;; als: preven:s any C:. .rc:

Specifica: ion 3.i.3.5 anc :ht::her CEAs in its group by more than 7.a, inches being misaliened from all (indica.ed position). _

3/4119 knendment No. 25 or.iurc ri U rs - -

P303290304 830315 PDR ADOCK 05000317

.- fP fpf5B - , . .. _. _

j

,gi

,k] I REACTIVITY CONTROL SYSTEMS POSITION INDICATOR CHANNELS Ll".ITING CONDITION FOR OPERATION

~

, inserted position, the " Full In" limit of the CEA with the incperable indicator 'is actuated and verifies-this CEA to be fully inserted. Subsequent operation shall be within the limits of Specification 3.1.3.6.

2. or, if the failure existed before entry into MODE 2 or occurs prior to an "all .CEAs out" configuration, the CEA group (s) with inoperable posit' ion indicator channel must be moved to the "Fui1 Out" position and verified to be fully withdrawn via a-

" Full Out" indicator. These actions must be completed within 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> of entry into fiODE 2 and prior to exceeding 70% of the maximum allowable THERMAL POWER level for-the existing Reactor Cooiant Pump combination. The provisions of Specification 3.0.4 are not applicable.

c. 'Jith a maximum of one reed switch _pesition indicator channel per group or one pulse counting position indicator channel per group inoperable and the CEA(s) with the inoperable position indicator channel at

~

either its fully inserted position or fully withdrawn position,-opera- ,!

g

,o tion may continue provided: ,

! 1. The. position of this CEA is verified immediately 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 /> thereaf ter by i s " Full In"'or " Full Out" limit (as applicable),

2. The affected CEA(s) is subsequently maintained fully inserted or fully withdrawn (as applicable). This requirement is exempted during CEA motion required for surveillance testing pursuant to Technical -

Specification 3.1.3.1.

2. Subsecuent operation .is within the limits of Specifications 3.1. 3. 6 and 3 1.3.1 d.' With more than one pulse counting position indicator channels. inoper-able, ' operation in MODES 1 and 2 may continue for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided all of the reed switch position indicator channels are-OPERABLE.

SURVEILLANCE REOUIREMENTS q-4.1. 3. 3 Each position indicator channel shall be determined to be.0PERABLE by verifying the pulse counting position indicator channels and the reed switch position indicator channels agree within 4.5 inches et least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> A- m, except during time intervals when the Deviation circuit is inoperable, then W compare the pulse counting position indicator and reed switch position indicator channels at least once per ,4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

'CALVERT CLIFFS - 3/4 1-22 Amendment No. 56. 73 -

- a

-~ -_ =

n - r y,

t .

i; -

l REACTIVITY CONTROL SYSTElis g '

BASES Overpower margin is provided to protect the core in the event of a large misalignment (> 1S 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 variations in other system parameters (e.g., pressure and coolant temperature) may not be sufficient to cause trips, it is probable that the reactor could be operating with process variables less conservative than those assumed in generating LCO and LSSS setpoints. .

Therefore, the ACTION statement associated with the large misalignment of "a CEA requires a prompt and significant reduction in THEPBAL POWER prior to attempting realignment of the misaligned CEA. .

The ACTION statements applicable to misaligned or inoperable CEAs include requirements to align the OPERABLE CEAs in a given group with the inoperable CEA. Conformance with these alignment requirements bring the core, within a short period of time, to a configuration censistent 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) avaifable shutdown margin which are more adverse than the conditions assumed to D,., -

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.

Operability of the CEA position indicators is required to determine CEA positions and thereby ensure compliance with the CEA alignment and insertion limits and ensures proper cperation of the rod block circuit.

The CEA " Full In" and " Full Out" limits provide an additional independent means for detemining the CEA positions when the CEAs are at either their fully inserted or fully withdrawn positions. Therefore, the ACTICN statements applicable to inoperable CEA position indicators permit continued operations when the positions of CEAs with inoperable position indicators can be verified by the " Full In" or " Full Out" limits.

CEA positions and OPERABILITY of the CEA position indicators are required to be verified on a nominal 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 frequent verifications required if an automatic monitoring chadnel is inoperable. These verification frequencies are adequate for assuring that the applicable LC0's are satisfied.

The surveillance requirements af fecting 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) 6. '

if all position indication were lost during testing the time would be short enough to allow a power reduction to 70% of maximum allowable thermal power within ,

one hour from when the testing was initiated. The time limit ensures CEA misalignments occuring during CEA testing are corrected within the time requitements required by existing specifications. ,

8 3/4 t-4 w

L ~. .

'r i l

.t. V .- .

~

'!EEACTIVITY CONTROL SYSTE."5 ,

i l

l

.I 4

LI"ITING CDNDITION FOR OPERATION 1

2. Declare the CEA inoperable. After declaring the CEA inoperabie, POWER OPERATION may continue for up to 7 days per occurrence with a :ctal accumulated time of < 14 -

days per calendar year provided the remainder of the CEAs in the group with the inoperable. CEA art" aligned to Within 7.E inches of the inoperabie .CEA while maintaininc j . .the allowable CEA secuence and insertien-i-imi-ts-shown on' _ _ . . .

i Ficure 3.1-2; the THEPJ4AL POWER level shall be restricted .'

pursuan; to Specification 3.1.2.E durine subsecuent operation.

g. - With more ihan one full length CEA inoperable or taisaligned from any c:her CEA in its group by 1E inches (indicated posi-tion) or more, be in a least at least HDT STANDEY-within E ,

1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. .

l 45URVEILLANCE F.EOUIRD'EN o _ _ . . . . . .

i I

8 '

li .i . 2. i .i Tne positien of each fell length CEA shzii be dete mined t6 be within 7.E inches - (indica ec position) of all o;her CEAs in its group at lea: once per 12 h urs except during time intervals unen the Deviation Circui; a nd/or CIA u.c:ict Inhibi: are inoperatie, then verify :ne incivicuai '

CEA peritions at iear: 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 full length CEA not fully inserted shall be determined to be -

OPERABLE by inserting it at least 7.5 inches at least once per 31 days. If the .

CEA has an inoperable position indication channel, the alternate indication system (pulse counter or voltage dividing network) will be used to monitor positon. If a direct position indication (full out reed switch or voltage dividing network) cannot  !

be restored within ten minutes from the commencement of CEA motion, or CEA i

withdrawal exceeds the surveillance testing insertion by '> 25 inches the position L

of the CEA shall be assumed to have been > 15 inches from its group at the  !

commencement of CEA motion and the applicable actions of T.S. 3.1.3.1 shall be l 1

taken.

4 .1 ~. 2 .1. 3 The CEA !40 icn inhibit shall be demonstrated OEEEA3lE a?

L ieas cnce per Il days by a funt:ionai :es; which verifies that the circui; maintains the CIA group overiap and secuent nc recu1rements of Specifica icn 3.i .2.E and that ht circuit also prevents any CEA 1r00 being misaligned from all :her CEAs in its group by more than /.s inches

(indicated position). _

1

- p 1.): - Amendment No. 25

r. CLi r r5 - -

l Cath.

i

• +~~s h.m .22 -

~

r-

.yi REACTIVITY ~ CONTROL SYSTEMS

'6

! POSITION INDICATOR CHANNELS LIMITING CC;;DITION FOR OPERATION inserted position, the " Full In" limit of the CEA with the inoperable indicator is actuated and verifies this CEA to be fully inserted. Subsequent operation shall be within the limits of Specification 3.1.3.6.

2. or, if the failure existed before entry into MODE 2 or occurs prior to an "all CEAs out" configuration, the CEA group (s) with inoperable posit' ion indicator channel must be moved to the

" Full Out" position and verified to be fully withdrawn via a -

" full Out" indicator. These actions must be completed within-10 hours of entry into' H0DE 2 and prior to exceeding 70% of the muimum allowable THERMAL POWER level for the existing Reactor Cooient Puap combination. The provis ions of Speci fica *. ion 3.0.4 are not applicable. -

c. With a maximum of one reed' switch position indicator channel per group or one pulse counting position indicator channel per group inoperable and the CEA(s) with the inoperable position indicator channel at either its fully inserted position or fully withdrawn position, opera-g ' tion may continue provided: ,

I

1. ine position cf this CEA is verificc' immediately and at least once per 12 nours thercaf ter by its " Full In" or " Full Out" limit (as applicable).

2. The affected CEA(s)is subsequently maintained fully inserted or fully withdrawn (as applicable). This requirement is exempted during CEA motion required for surveillance testing pursuant to Technical Specification 3.1.3.1.

3. Subsecuent operation is within the limits of Specificationc 3.1. 3. 6 and 3 1.3.1 d." With more than one pulse counting pcsition indicator channels inoper-able, operation in MODES 1 end 2 may continue for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> provided all of the reed switch position indicator channels are OPERABLE.

SURVEILLANCE REOUIREMENTS 4 .1. 3. 3 Each position indicator channel shall be determined to be OPERABLE by verifying the pulse counting position indicator channels and the reed swit:h position indicator channels acree within 4.5 inches at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> N except during time intervals when the Dcviatior, circuit is inoperable, then g'7 compare the pulse counting position indicator and reed switch position indicator channels at least once per ,4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

l CALVERT CLIFFS - 3/4 1-22 knendment No. 56. 73

.- __ ________________________________.____J

. 1

[ ,. .-

[O REACTIVITYCONTROLShSTEMS l f' BASES Overpower margin is provided to protect the core in-the event of a large misalignment (> 15 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 variations in other system parameters (e.g., pressure and' coolant temperature) may not be sufficient ~to cause trips, it 'is probable that the reactor could be operating with process variables less conservative than those assumed in generating LCO and LSSS setpoints. .

• Therefore, the ACTION statement asscciated with the large misaliiinment of a CEA requires a prompt and significant reduction in THERMAL p0WER prior to attempting real.ignment of the misaligned CEA.

The ACTION statements applicable to misaligned or inoperable CEAs include requirements to align the OPERABLE CEAs in a given group with the inoperable CEA. Conformance with these alignment requirements bring the core, within a short period of time, to a configuration consistent with

t. hot assumed in generating LCO and LSSS setpoints, fluwev e r ,1 extended operation with CEAs significantly inserted in the core may lead to perturbations in l) local burnup, 2) peaking factors and 3) avaifable shutdown margin which are more adverse than the conditions assumed to h.,,

exist in the safety analyses and LC0 and LSSS setpoints determination.

Therefore; time limits have been imposed on operation with inoperable CEAs to preclude such adverse conditions from developing.

Operability of the CEA position indicators is required to determine CEA_ positions and thereby ensure compliance with the CEA alignment 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 determini,ng the CEA positions when the GEAs are at either their fully inserted or fully withdrawn positions. Therefore, the ACTION statements applicable to inoperable CEA position indicators permit continued operations when the positions of CEAs with inoperable position indicators can be verified by the " Full In" or " Full Out" limits.

CEA positions and OPERABILITY of the CEA position indicators are required to be verified on a nominal 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 frequent verifications required if an automatic monitoring channel is inoperable. These verification frequencies are adequate for assuring that the applicable LCO's 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 position indication were lost during testing the time would be short enough p

to allow a power reduction to 70% of maximum allowable thermal power within  ;

one hour from when the testing was initiated. The time limit ensures CEA

. misalignments ~ occuring during CEA testing are corrected within the time re_quirements required by existing specifications. ., ,

u- _ _ _ _ _ - _ _ _ _ _ _ _ __ k- - - _ - '-J