ML20210T679

Proposed Tech Specs Supporting Application for Amend to Licenses DPR-53 & DPR-69,including Revised Surveillance Requirement 4.4.10.1.2, Augmented Inservice Insp Program for Main Steam & Main Feedwater Piping

ML20210T679
Person / Time
Site:	Calvert Cliffs
Issue date:	10/01/1986
From:	BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20210T667	List: ML20210T660 ML20210T679
References
NUDOCS 8610090135
Download: ML20210T679 (18)

Text

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REACTIVITY CONTROL SYSTEMS 3/4.1.3 MOVABLE CONTROL ASSEMBLIES rutt L:5:r' c ? rc:: ::"

LIMI-TING CONDITION FOR OPERATION 3.1.3.1 The CEA Motion Inhibit and all-Teil i s;th / shutdown and regula-ting 7 CEAs shall be OPERABLE with each CEA of a given group positioned i

within 7.5 inches (indicated position) of all other CEAs in its group.

APPLICABILITY: MODES 1* and 2*.

ACTION:

With one or more til is;th CEAs incperable due to being a.

imovable as. a result of excessive friction or mechanical interference.cr known to be untrippable, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

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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.

Place and maintain the CEA drive system mode switch in either the "Off" or any " Manual Mode" position and fully

(

withdraw all CEAs in groups 3 and 4 end withdraw the CEAs in group 5 to less than 5% insertfor, or 3.

Be in at least HOT STANDBY.

With one S11 1=;t5 CEA inoperable due to causes other than c.

addressed by ACTION a, above, and inserted beyond the Long Term Steady State Insertion Limits but within its above specified alignment requirements, operation in MODES 1 and 2 may con-tinue for up to 7 days per occurrence with a total accumulated time of 5 14 days per calendar year.

d.

With one til

=;tF CEA inoperable due to causes other than addressed by ACTION a, above, but within its above specified alignment requirements and either fully withdrawn or within the Long Term Steady State Insertion Limits if in CEA group 5, operation in MODES 1 and 2 may continue.

• See Special Test Exceptions 3.10.2 and 3.10.4.

8610090135 861001 DR ADOCK 0500 7

l lCALVERTCLIFFS-UNIT 1 3/4 1-17 ll.

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REACTIVITY CONTROL SYSTEMS LIMITING CONDITION FOR OPERATION e.

With one or more ful' 1;r.;th CEAs misaligned from any other CEAs in its group by more than 7.5 inches but less than 15 inches, operation in MODES 1 and 2 may continue, provided that within one hour the misaligned CEA(s) is either:

1.

Restored to OPERABLE status within its above specified alignment requirements, or 2.

Declared inoperable.

After declaring the CEA inoperable, operation in MODES 1 and 2 may continue for up to 7 days per occurrence with a total accumulated time of < 14 days per calendar year provided all of the following conditions are met:

a)

The THERMAL POWER level shall be reduced to < 70% of the maximum allowable THERKAL POWER level for the existing Reactor Coolant Pump combination within one hour; if negative reactivity insertion is required to reduce THERMAL POWER, boration shall be used, b)

Within one hour after reducing the THERMAL POWER as required by a) above, the remainder of the CEAs in NEpt4c6 kv/Ttl the group with the inoperable CEA shall be aligned to within 7.5 inches of the inoperable CEA while (61S E A 7' A

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maintaining the allowable CEA sequence and insertion limits shown on Figure 3.1-2; the THERMAL POWER level shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation.

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P0.R a req red bove ei er:

1.

Restore the CEA to within the above specified alignment requirements, or CALVERT CLIFFS - UNIT 1 3/4 1-18

x INSERT A f.

With one CEA misaligned from any other CEA in its group by 15 inches or more, operation in MODES 1 and 2 may continue, provided that the misalighed CEA is positioned within 7.5 inches of the other CEAs in its group in accordance with the time allowance shown in Figure 3.1-3.

The T

pre-misaligned F. value used to determine the allowable time to realign p

the CEA from Figure 3.1-3 shall be the latest measurement taken within 5 days prior to the CEA misalignment.

If no measurements were taken within T

5 days prior to the misalignment, a pre-misaligned F of 1.65 shall be 7

assumed, g.

With one CEA misaligned from any other CEA in its group by 15 inches or more at the conclusion of the time allowance permitted in Figure 3.1-3, immediately! start to implement the following actions:

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) 50% of RATED THERMAL POWER b) 75% of the THERMAL POWER level prior to the misalignment within one hour after exceeding the tir.e allowance permitted by Figure 3.1-3.

2.

If the THERMAL POWER level prior to the misalignment was less than 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, bc. ration shall be used. Within one hour after establishing the

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appropriate THERMAL POWER as required above, either:

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l REACTIVITY C0f: TROL SYSTEMS LI"ilTING COMDIT10l FOR OPERATION 2.

Declare the CEA inoperable.

Af ter declaring the CEA inoper-

'able, POWER OPERATION may continue for up to 7 days per occurrence with a total accumulated time of < 14 days per calendar year provided the remainder of the CEAs in the group with the inoperable CEA are aligned to within 7.5 inches of the inoperable CEA while maintaining the allow-able CEA sequence and insertion limits shown on Figure 3.1-2; the THERMAL POWER level shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation.

h[.

With more than one f.11 in;th CEA inoperable or misaligned from any other CEA in its group by 15 inches (indicated position) or more, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

I j /.

For the purposes of performing the CEA operability test of TS 4.1.3.1.2, if the CEA has an inoperable position indication channel, the alternate indication system (pulse counter or voltage dividing network) will be used to monitor position.

If a direct positi6n indication (full out reed switch or voltage dividing net-work) cannot be restored within ten minutes from the commencement of CEA motion, or CEA withdrawal exceeds the surveillance testing

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

SURVEILLANCE REOUIREMENTS 4.1. 3.1.1 The position of each

'_l' l=;tS CEA shall be determined to be l

within 7.5 inches (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/

l or CEA liotion 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 />.

i 4.1. 3.1. 2 Each ful' ine CEA not fully inserted shall be determined to be OPERABLE by inserting it at least 7.5 inches at least once per 31 days.

4.1. 3.1. 3 The CEA Motion Inhibit shall be demonstrated OPERABLE at least once f er 31 days by a functional test which verifies that the circuit mcin-l i

tains the CEA group overlap and sequencing requiremer.ts of Specification l

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).

i CALVERT CLIFFS - UNIT 1 3/4 1-19 Amendment No. !E, E4 4

-n,-

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y TABLE 3.3-5 ENGINEEREDSAFETYFEATURESRESPONSETIMES INITIATING SIGNAL AND FUNCTION RESPONSE TIME IN SECONDS 1.

Manual a.

SIAS Safety Injection (ECCS)

.Not Applicable b.

CSAS Containment Spray Not Applicable c.

CIS Containment Isolation Not Applicable d.

RAS Containment Sump " Recirculation Not Applicable e.

AFAS

([

Auxiliary Feedwater Initiation Not Applicable 2.

Pressurizer Pressure-Low a.

Safetf Injection (ECCS)*

$ 30*/ 30'**

3.

Containment Pressure-High a.

Safety Injection (ECCS) 1 30*/30**

b.

Containment Isol.atien' 1 30 c.

Containment Fan Coolers 1 35*/10**

4.

Containment Pressure-High 60*/60**(I) a.

Containment Spray 1

5.

Containment Radiation-High 7

a.

Containment Purge Valves Isolation 1

l

.CALVERT CLIFFS-UNIT 1 3/4 3-20 Arnendment No. fB, Hh r

l

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i kEACTORCOOLANTSYSTEM SURVEILLANCE REQUIREMENTS (Continued)

In addition to the requirements of Specification 4.0.5, each Reactor Coolant Pump flywheel shall be inspected per the recommendations _ of__

Regulatory Position C.4.b of Regulatory Guide 1.14, Revision 1, August 1975.

4.4.10.1.2 Aucmented Inservice Inspection program for Main Steam and Main Feedwater Piping - The unencapsulated welds greater than 4 inches in nominal diameter in the main steam and main feedwater piping runs located outside the containment and traversing safety related areas or located in compartments adjoining safety related areas shall be inspected per the following augmented inservice in-spection program using the applicable rules, acceptance criteria, and repair procedures of the ASME Boiler and Pressure Vessel Code,Section XI,4491r Edition and Addenda through Summer 4491r, for Class 1

2 components'.i?*

M 75

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,a r Sy t461 'nte r4ty fan baseJin~e daja shall be established by/

r,f i

1 volujetricjximinajj f,each wel'd,/

prior to,excee ing,18 months of operation a /.

Each weld shall be examined in accordance with the above y

ASME Code requirements, except that 100% of the welds shall be examined, cumulatively, during each 10 year in-spection interval. *The welds to be examined during each inspection period shall be selected to provide a repre-sentative sample of the conditions of the welds.

If these examinations reveal unacceptable structural defects in one or more welds, an additional 1/3 of the welds shall be examined and the inspection schedule for the repaired wejds shall revert back te the #4-st 10 year #nspcetier As e r A NE w0

• f"*' "*' "$Feiram.

If additional unacceptable ' defects are detected in the second sampling, the remainder of the welds shall also be inspected.

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i' AmendmentNo.j{'g' CALVERT CLIFFS - UNIT 1 3/4 4-28 y

REPUltC WITH REACT 7VfTY CONTROL SYSTEMS (ggg g

[POSSI BASES f

Overpower margin is provided to prc tett the core in the event of a large misaligment (> 15 inches) of a CEA. Hc wever, this misalig ment would cause distortion of the core power distributic n.

The reactor protective system would not detect the degradation in radial peaking factors and since varia-tions in other system parameters (e.g.,

ressure and coolant temperature) may not be sufficient to cause trips, it is,-&th that the reactor could be operating with process variables less conservative than those assumed in d'

generating LCO and LSSS setpoints.1 Tyer o r, t 'e TI N at

't s

i ed wifn t)ie lfrgg'misfligfce of a/Ely/re.rir s a pr. pt an s ni ic t e c-eal g ent of h m al gn C A.

Von /n VER$L PAWEV pr' r go btppt ng NSERT The ACTION statements applicable to misaligned or inoperable CEAs include C

requirements to align the OPERABLE CEAs in a given group with the inoperable CEA. Conformance with these aligment requirements bring the core, within a short period of time, to a ccnfiguration consistent with that assumec' 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 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 C,EA position indicators is required to determine CEA positions and thereby ensure compliance with the CEA aligment 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 deter-mining the CEA positions when the CEAs are at either their fully inserted or fully withdrawn positions. Therefore, the OPERABILITY and the ACTION l

statements applicable to inoperable CEA position indicators pennit continued operations when 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 l

l 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 position indication were lost during testing, the time would be short enough to allow a power reduction to 70% of maximum allowable thennal power within one hour from when the testing was initiated. The time limit ensures CEA misalignments occurring during CEA testing are corrected within the time requirements required by existing specifications.

CALVERT CLIFFS - UNIT 1 B 3/41-4 Amendment No. 44, 90 i

l l

l - - -.

INSERT B The ACTION statement associated with a large CEA misalignment requires prompt action to realigo 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.

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

1.

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.

WhentheactualFfislessthantheTechnicalSpecificationvalue, 2.

additional margin exists.

This additional margin can be credited to offset the increase in Ff with 3.

time that will occur following a CEA misalignment due to xenon redistribution.

The requirement to reduce power level after the time limit of Figure 3.1-3 is T

reached offsets tne continuing increase in F that can occur due to xenon 7

redistribution. A power reduction is not required below 50% power.

Below 50%

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power there is sufficient conservatism in the DNB power distribution LCOs to completely offset any, or any additional, xenon redistribution effects.

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l REACTIVITY CONTROL SYSTEMS 3 / 4.1. 3 MOVABLE CONTROL ASSEMBLIES

""' L '.D:C' T E:T:S LIMITING CONDITION FOR OPERATION The CEA Motion Inhibit and all !bi'

;:n /' shutdown and regula-3.1.3.1 ting 7 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*.

ACTION:

With one or more f 11 1:ngth CEAs inoperable due to being immovable as a result of excessive friction or mechanical a.

interference or known to be untrippable, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

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:

b.

1.

Restore the CEA Motion Inhibit to OPERABLE status, or

(

Place and maintain the CEA drive system mode switch in 2.

either the "Off" or any " Manual Mode" position and fully withdraw all CEAs in groups 3 and 4 and withdraw the CEAs in group 5 to less than 5% insertion, or 3.

Se in at least HOT STANDBY.

With one Juil 1:.;th CEA inoperable due to causes other than addressed by ACTION a, above, and inserted beyond the Long Term c.

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Steady State Insertion Limits but within its above specified alignment requirements, operation in MODES 1 and 2 m time of 1 14 days per calendar year.

With one 4,11 1:n;th CEA inoperable due to causes other than addressed by ACTION a, above, but within its above specified d.

alignment requirements and either fully withdrawn or within the Long Term Steady State Insertion Limits if in CEA group 5, operation in MODES 1 and 2 may continue.

See Special Test Exceptions 3.10.2 and 3.10.4.

CALVERT CLIFFS-UNIT 2 3/4 1-17 AUG 1 s t c

i REACTIVITY CONTROL SYSTEMS LIMITING CONDITION FOR OFERATION i

With one or more 'u

tF CEAs misaligned from any other e.

CEAs in its group by more than 7.5 inches but less than 15 1

inches, operation in MODES 1 and 2 may continue, provided that within one hour the misaligned CEA(s) is either:

1.

Restored to OPERABLE status within its above specified alignment requirements, or 2.

Declared inoperable.

After declaring the CEA inoperable, operation in MODES 1 and 2 may continue for up to 7 days per occurrence with a total accumulated time of < 14 days per calendar year provided all of the following conditions are met:

a)

The THERMAL POWER level shall be reduced to < 70% of the maximum allowable THERMAL POWER level for the existing Reactor Coolant Pump combination within one hour; if negative reactivity insertion is required to reduce THERMAL POWER, boration shall be used.

b)

Within one hour after reducing the THERMAL POWER as required by a) above, the remainder of the CEAs in EPLR6 W# the group with the inoperable CEA shall be aligned to within 7.5 inches of the inoperable CEA while

/A/Sf[/ll' A

maintaining the allowable CEA sequence and insertion limits shown on Figure 3.1-2; the THERMAL POWER level shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation.

N I

f W' h on ful len sh A mi alig ed f om ny the CE in ts

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roup y1 inc so mor, re ce ER L WE to 70 of the xim. al wab e TH' L OWE 1

el or e

st ng Re tor cola t P pc.bina ion it.n eh r;

f ga ve acti ity ser on re ire to ed eT R P.ER b a-tion hal be ed.

dit 'n on ho af.er du ingf HE PO '

as equ' ed ove eit r:

/

/

t

'W Restore the CEA to within the above specified alignment 1.

requirements, or 9

CALVERT CLIFFS-UNIT 2 3/4 1-18 AUG 13 n

INSERT A f.

With one CEA misaligned from any other CEA in its group by 15 inches or more, operation in MODES I and 2 may continue, provided that the misaligned CEA is positioned within 7.5 inches of the other CEAs in its group in accordance with the time allowance shown in Figure 3.1-3.

The T

pre-misaligned F value used to determine the allowable' time to realign 7

the CEA from Figure 3.1-3 shall be the latest measurement taken within 5 days prior to the CEA misalignment.

If no measurements were taken within T

5 days prior to the misalignment, a pre-misaligned F of 1.65 shall be 7

assumed.

g.

With one CEA misaligned from any other CEA in its group by 15 inches or more at the conclusion of the time allowance permitted in Figure 3.1-3, immediately start to implement the following actions:

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) 50% of RATED THERMAL POWER b) 75% of the THERMAL POWER lev'el prior to the misalignment i

~

within one hour after exceeding the time allowance permitted by Figure 3.1-3.

2.

If the THERMAL POWER level prior to the misalignmer.t was less than 50% of RATED THERMAL POWER, maintain THERMAL POWER no higher than j

the value prior to the misalignment.

If negative reactivity insertion is required to reduce THERM /. TOWER, l

boration shall be used.

Within one hour after establishing the appropriate THERMAL POWER as required above, either:

I FIGURE 3.1-3 ALLOWABLE TIME TO REALIGN CEA VERSUS i

INITIAL TOTAL INTEGRATED RADIAL PEAKING FACTOR 78

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i 68 (1.53,60)

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978 - 600 F R

Se 5

5 4e i

5 E

3 s

5 ALLOWED REGION se E

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2e F

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(1. 63, 0)

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g 1.58 1.51 1.52 1.53 1.54 1.55 1.56 1.57 1.58 1.59 1.68 1.61 1.62 1.63 1.64 1.65 MEASURED PRE-MISALIGNED TOTAL INTEGRATED RADIAL PEAKING FACTOR

REACTIVITY C0" TROL SYSTEMS lit 11 TING CONDITION FOR OPERATION 2.

Declare the CEA inoperable.

After declaring the CEA inoperable.

POWER OPERATION r 4y continue for up to 7 days per occurrence with a total accumulated time of < 14 days per calendar year provided the remainder of the CEAs in the group with the inoper-able CEA are aligned to within 7.5 inces of the inoperEble CEA while maintaining the allowable CEA sequence, and insertion limits shown on Figure 3.1-2; the THERMAL POWER 1evel shall be restricted pursuant to Specification 3.1.3.6 during subsequent operation.

hj(.

With more than one f.1' 1;...th CEA inoperable or misaligned from any other CEA in its group by 15 inches (indicated position) or more, be in at least HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

i J ff.

For the purposes of performing the CEA operability test of T.S.

4.1.3.1.2, if the CEA has an inoperable position indication channel, the alternate indication system (pulse counter or voltage dividing network) will be used to monitor position.

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 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.

SURVEILLANCE REOUIREMENTS 4.1. 3.1.1 The position of each f.li 1;r.;th CEA shall be determined to be within 7.5 inches (indicated position) of all other CEA's 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 />.

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.

4.1. 3.1. 3 The CEA Motion Inhibit shall be demonstrated OPERABLE at least once per 31 days by a functional test which verifies that the circuit main-tains 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).

(-

CALVERT CLIFFS - UNIT 2 3/4 1-19 knendment No. 73, 67 4

e ee=

e e.

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,. -, e e 9

TABLE 3.3-5 ENGINEERED SAFETY FEATURES RESPONSE TIMES INITIATING SIGNAL AND FUNCTION RESPONSE TIME IN SECONDS 1.

Manual a.

SIAS Safety Injection (ECCS)

Not Applicable b.

CSAS Containment Spray Not Applicable c.

CIS

~

Containment Isolation Not Applicable d.

RAS Containment Sump Recirculation Not Applicable e.

AFAS c7 Auxiliary Feedwater Actuation Not Applicable l.

2.

Pressurizer Pressure-Low

(

a.

Safety Injection (ECCS) 5,30*/30**

3.

Containment Pressure-High a.

Safety Injection (ECCS)

< 30*/20**

b.

Containment Isolation

< 30

'c.

Containment Fan Coolers 5,35*/10**

4.

Containment Pressure--High a.

Containment ~ Spray 5,.60*/60**

S.

Containment Radiation-High a.

Containment Purge Valves Isolation 5,[~f 1.

r:

CALVERT CLIFFS - UNIT 2 3/4 3-20 Amendment No. 6, 3Z,Jpgg -

,.m-r - - -

. ~, - -

w

REACTOR COOLANT SYSTEM SURVEILLANCE REQUIREMENTS (Continued)

In addition to the requirements of Specification 4.0.5, each Reactor Coolant Pump flywheel shall be inspected per the reccmmendations of-Regulatory Position C.4.b of Regulatory Guide 1.14, Revision 1, August 1975.

4.4.10.1.2 Aucmented Inservice Insoection Program for Main Steam and Main Feedwater Piping - The unencapsulated welds greater than 4 inches in nominal diameter in the main steam and main feedwater piping runs located outside the containment and traversing safety related areas or located in compartments adjoining safety related areas shall be inspected per the following augmented inservice in-spection program using the applicable rules, acceptance criteria, and repair procedures of the ASME Boiler and Pressure Vessel Code,Section XI, M74-Edition and Addenda through Summer-1-9M; for Class j

2 components. "

Au l

[

t. ij(teg 'ty a d ba.lin dat 'sh 1

. es ablpshe b

1 r

00 ol..etri exa ina ion fe eld p iopynng jto pxceeding 1) mon. s of ope ati n.

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i b.

Each weld shall be examined in accordance with the above

)'

ASME Code requirements, except that 100% of the welds shall be examined,, cumulatively, during each 10 year in-spection interval.

The welds to be examined during each inspection period shall be selected to provide a repre-sentative sample of the cenditions of the welds.

If these i

examinations reveal unacceptable structural defects in one or more welds, an additional 1/3 of the welds shall be examined and the inspection schedule for the repaired welds shall revert back tc the first 10 year hg:cticP A5 LF A Wed me"T'eg r r.

If additional unacceptable defects are detected i

in the second sampling, the remainder of the welds shall also be inspected.

i I

[

CALVERT CLIFFS - UNIT 2 3/4 4-29 Amendment No.

,-m

ggp p g WID REACTIVITY CONTROL SYSTEMS fNSEAT 6 POSSIb BASES

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protective system would not detect the degradation n radial peeking factors and f

since variations in other system parameters (e.g., pressure and coolant tempera-i ture) may not be ' sufficient to cause trips, it is ;-M that the reactor could be operating with process variables less conservative than those assumed in generating LCO and LSSS setpoints.] Th ref. e, he aCT ON

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oc'-

'atyt wy.h trA lar/3e alifnmer/ off! C re air s a ro pt d

is fi nt

r/ducyion % THfrMA POWF,A priAr tcf at

-ot' c eal'an: nt

.e..sa.gn u C".

SE8 MThe ACTION statements applicable to misaligned or inoperable CEAs include C

,,, r requirements to align the OPERABLE CEAs in a given group with the inoperable CEA.

Conformance with these alignment requirements brings the core, within a short period of time, to a configuration consistent with that assumed in generating LCO and LSSS setpoints.

However, extended operation with CEAs significantly 1

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 condi-tions assumed to exist in the safety analyses and LCO and LSSS setpoints deter-mination.

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 7

L In" and " Full Out" limits provide an additional independent means for deter-mining the CEA positions when the CEAs are at either their fully inserted or fully withdrawn positions.

Therefore, the OPERABILITY and the ACTION state-l ments 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 verif' cations required if an automatic monitoring channel is inoperable.

inese verification frequencies are adequate for assuring that the applicable LCOs ire 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 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 occurring during CEA testing are corrected within the time requirements required by existing specifications.

The maximum CEA drop time restriction is consistent with the assumed CEA drop time used in the accident analyses.

Measurements with T,yg ?_

515' and with all reactor coolant pumps operating ensures that the CALVERT CLIFFS - UNIT 2 B 3/41-4 knendment No. M,71

s INSERT B The ACTION statement associated with a large CEA misalignment requires prompt action to realigo 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.

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

1.

The margin calculations which support the power distribution LCOs for DNBRarebasedonasteady-stateFfasspecifiedinTechnical Specification 3.2.3.

T 2.

When the actual F is less than the. Technical Specification value, 7

additional margin exists.

ThisadditionalmargincanbecreditedtooffsettheincreaseinFfwith 3.

time that will occur following a CEA misalignment due to xenon redistribution.

The requirement to reduce power levcl after the time limit of Figure 3.1-3 is T

reached offsets the continuing increase in F that can occur due to xenon p

redistribution. A power reduction is not required below 50% power.

Below 50%

power there is sufficient conservatism in the DNB power distribution LCOs to completely offset any, or any additional, xenon redistribution effects.

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