Text

Proposed Tech Specs Re RCS Flow Measurement Uncertainity & LCO for Value of RCS Flow
	ML20082J159
Person / Time
Site:	Vogtle
Issue date:	08/19/1991
From:	; GEORGIA POWER CO.
To:	;
Shared Package
ML20082J157	List: ELV-03043, Responds to NRC 910815 Discussion Re Inconsistent LCO Value Noted in Review of 910808 Application for Amend to Licenses NPF-68 & NPF-81,revising RCS Flow Measurement Uncertainity & LCO Value of RCS Flow; ML20082J159;
References
	NUDOCS 9108270192
	Download: ML20082J159 (11)
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ff=TRD15'IR15tfT10NLIM115 J/4.2.5 DNB PARVETfR$

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h LIMITING CONDITION FOR OPERATION 3.2.5 The following DNE related parameters shall be maintained within the limits:

a.

Ro e Coolant System T _ (T10412, T! 04M. TI 0432,11*0432),

m 1 D 7572.5'F (Euk D ee 5WF(wg b.

Pressuriser Pressure (Fev411A,Ei'. rev6_& P! 0456A, F10467 &

P! 0457A, PI 0418 & PI 0458A), g pi4_ piC Reactor Coolant Systen Flow (F1 0414 F1 0415 F1 0416 F1 0414, c.

F10425, FI 0826, F10434, F10435, f! 0436, II 0444, f!-0446, F1 0446) % 1H y ge 8

"T ApptitABILITY: MDD

[heg']g w-ACTION:

With any of tht above parareters exceeding its litit, restore the parameter to within its limit within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or reduce THERKAL P0i[R to less than LA of RATED THERMAL POWER within the next 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months ._

j@a 7 dayr aller escrebb) fcit MUfD L7Hfon %st (unt I) or svRvt1LLANCE Rt0U1REYtKT5 verified to be within thei! and Pressuriser Pres Reactor coolant System T,,

4.2.5.1 limits at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

RC5 flow rate shall be monitored for degradation at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

In the event of flow degradation, RC$ flow rate shall be l

determined by precision best balance within 7 days of detection of i

flow degradation.

l 4.2.5.2 The RCS flow rate indicators shall be subjected to CHANNEL l

CAL 15 RATION at each fuel loeding and at least once per 18 cenths.

4.2.5.3 After each fuel leadindhe RC5 flow rate shall be determined by precision heat balancefprior to operation nove 75% RATED THERKAL POWE R, the RCS flow rate shall also be setermined by precision heat (g y/

tala7sce at least once per la months. Within 7 days prior Ao,_3.et-forning the precision heat balance flo7sessurteent, the instrumnt' 1

l stfon used for perforsin0 the precision best belance sh411 be calibrated. The provisions of 4.0.4 are not applicole for perfeming the precision heat balance flow measurement.

" Limit not applicable during either THERMAL POVtR ramp In excess 4f 5% of l

RATED THERMAL POWER per minute or a THERMAL POVER step in excess of 10% of RATID THERKAL POWER.

- Includes a flew n asuenaent unce.tainty. _

- 7. (odiT 6-1.57. (ooit 2.) )

V0GTLE UNIT $ - 1 & 2 f J/4 c u 3

w2,'7 9108270192 910019 i

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POLTR Of ttelgUTION LIMITS (testT]

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B he 3/4.2.5 DNS Pata#ffiti (Continued)

The M hour periodic surve111ance of these parameters through instrument I

Madout is sufficient to ensure that the parameters are restored within their iletta following lead thanges and other expected transient operation. N 14 senth pert 3dic sessurement of the RC8 total flev rate is adeewate to setect flew degregatten and ensure terrelation of the flew indication thannels with sessures flew such that the indicates percent flew will previse sufficient verification of the flew rate degradation en a M hour basis. A change in i

indicated p'ercent flew which is greater than the instrument channel inaccuracies and parallax errers la en appropriate indication of RCS flew degradation.

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The mature nt oncertainty for the its totai n= is based v,en E'an.=w 4 ef and e.in precision beat biiance new mesure=nt aove e0s mu0 mmt Pthe resvits to co t

i If a precision heat balance flow measurewnt is perfereed below 905 RATED THIRMt POWER, the effect en the sensurement uncertainty shall be taken inte account. Potential fouling of the feedvater venturis which eight not be detected could bias the results free the precision heat balance in a non-conservative sanner. Therefore, a penalty of 0.11 for undetected feedvater venturi fouling is included in the measurement oncertainty. Any foultng which

. night bias the RC$ flow rate asesurement by more than 0.15 may be detected by sonitoring and trending varteus plant perforvance parameters. If detected, action shall be taken before performing subsequent precision heat balance flow

=4surements, i.e., either the effect of the fouline shall be eventified and N affected venturis shall-accounted for in the RC5 flow rate esasurement er.d RC5 flow valve of 393,136 spa be cleaned to eliainate the fouling. The indicate corresponds to an analytical value of 382,800 gpa with allowance for esasurewnt nd indication oncertainties.

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Y0GTLE UNITS - 1 & 2 03/4;

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EFFECTIVE A5 0F YOGTLE 1 CYCLE 4 D

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. POWER DISTRIBUTION llMlU

' 3/4.2.5 DNB PARAMETERS LIMITING CONDITION FOR OPERATION 3.2.5 The following DNB-related parameters shall be maintained within the limits:

a.

Reactor Coolant System T,y (11-0412, 11-0422, 11-0432. TI-0442),

s 592.5*F (Unit 1) or 591'F (Unit 2).

l b,

Pressurizer Pressure (PI-0455A,B&C, PI-0456 & P!-0456A, PI-0457 &

PI-0457A, pl-0458 & PI-0458A), 2 2199 psig* (Unit 1) or 2224 psig*

(Unit 2),

c.

Reactor Coolant System flow (F1-0414, F1-0415, F1-0416, F1-0424, F1-0425, F1-0426, F1-0434, F1 -0435, F1-0436, FI-0444, F1-0445, F1-0446) 1393,136 gpm** (Unit 1) or 396,198 gp ** (Unit 2).

APPLICABillJJ: H0DE 1.

)

ACTION:

i With any of the above parameters exceeding its limit, restore the parameter to 1

within its limit within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or reduce THERMAL POWER to less than 5% of

'O(

RATED THERMAL POWER within the next 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

I SURVElliANCE RE0VIREMENTS 3

and Pressurizer Pressure shall be Reactor Coolant System T 'r limits at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

4.2.5.1 verifiedtobewithinthE1 RG flow rate shall be monitored for degradation at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

In the event of flow degradation, RCS flow rate shall be determined by precision heat balance within 7 days of c'ttection of flow degradaticn.

4.2.5.2 The RCS flow rate indicators shall be subjected to CHANNEL CAllBRATION at each fuel loading ard at least once Per 18 months.

4.2.5.3 After each fuel loading, the RCS firw rate shall be determined by precision heat balance within 7 days after exceeding 90% RATED THERMAL POWER (Unit 1) or prior to operation above 75% RATED THERMAL POWER (Unit 2).

The RCS flow rate shall also be determined by precision heat balance at least once per 18 months. Within 7 davs prior to per-forming the precision heat balance ficw measurement, the instrument-ation used for performing the precision heat balance shall be calibrated. The provisions of 4.0.4 are not applicable for performing the precision heat balance flow measurement.

Limit not applicable during either a THERMAL POWER ramp in excess of 5% of RATED THERMAL POWER per minute or a THERMAL POWER step in excess of 10% of RATED THERMAL POWER.

- Includes a 2.7% (Unit 1) or 3.5% (Unit 2) flow measurement untertainty.

l V0GTLE UNITS - 1 & 2 3/4 2-13

~

THIS PAGE APPLICABLE TO UNIT 1 ONLY POWER DISTRIBUTION LIMITS - UNIT 1 BASES 3/4.2.5 DNB PARAMETERS (Continued)

The measurement uncertainty for the RCS total flow is based upon performing a precision heat balance flow measurement above 90% RATED THERMAL POWER and using the results to correlate the flow indication channels with the measured

flow, if a precision heat balance flow measurement is performed below 90% RATED THERMAL POWER, the effect on the measurement uncertainty shall be taken into account.

Potential fouling of the feedwater venturis which might not be detected could bias _the results from the precision heat balance in a non-conservative manner.

Therefore, a penalty of 0.1% for undetected feedwater venturi fouling is included-in the measurement uncertainty.

Any fouling which might bias the RCS flow rate measurement greater than 0.1% may be detected by monitoring and trending various plant performance parameters.

If detected, action shall be taken before performing subsequent precision heat balance flow measurements, i.e., either the effect of the fouling shall be quantified and accounted for in the RCS flow rate measurement or the effected venturis shall be cleaned to eliminate the fouling.

The indicated RCS flow value of 393,136 gpm corresponds to an analytical value of 382,800 gpm with allowance for measurement and indication uncertainties.

The 12-hour periodic surveillance of_these parameters through instrument readout is sufficient to ensure that the parameters are restored within their limits following load changes and other expected transient operation.

The 18 month periodic measurement of the RCS total flow rate is adequate to detect flow degradation and ensure correlation of the flow indication channels with measured flow.Jch that the indicated percent flow will provide sufficient verification of the flow rate degradation on a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months basis. A change in indicated percent flow which is greater than the instrument channel inaccuracies and parallax errors is an appropriate indication of RCS flow degradation.

V0GTLE UNITS - 1 & 2 B 3/4 2-4

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5 MARKED-UP PAGES EFFECTIVE A5 Of V0GTLE 2 CYCLE 3 4

POWER DISTRIBtfT109 LIMITS 3 /4.7.5 DNB PARAMETERS LIMITING EONDITION FOR OPtp.aTION 3.2.5 The following DNB-related parameters shall be maintained within the limits:

a.

Reactor Coolant System T._ (T1-0412.11-0422.11-0432. TI-0442),

l s 592.5'F [(Va" " " !?!'r (Urit :)g b.

Pressurizer Pressure (PI-0455A B1C, PI-0456 & Pl.0456A, PI-045Q P!-043?A, Pl-0458 L PI 045BA),12199 psig'%WTf !!!! m ;

(T" ' 2Q c.

Reactor Coolant System Flow (F1-0414, F1-0415, F1-0416, F1-0424 F1-0425 F1-0426, F1-0434, F1-0435 F1-0436. F1-0444 ri-0445, F1-0446) 1393.136 gpm" l(S t G c. 3L;,;;; e gun y. j APPL 1CaBillTY: MODE 1.

AE11M:

With any of the above parameters exceeding its limit, restore the parameter to within its limit within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or reduce THEPMAL POWER to less than 5% of RATED THERMAL POWER within the next 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

SUoVElttNCE Ft001REMENTS 4.2.5.1 Reactor Coolant System T, and Pressurizar Pressure shall be verified to be within th,e,ir Itaits at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . RCS flow rate shall be monitored for degradation at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months . In the event of flow degradation, RCS flow rate shall be determined by precision heat balance within 7 days of detection of flow degradition.

4.2.5.2 The RCS flow rate indicators shall be subjected to CMGNEL CAllBRATION tt each fuel leading and at least once per 18 months.

l 4.2.5.3 After each fuel loading, the RCS flow rate shall be determined by precision heat balance within 7 days after exceeding 90% RATED THERMAL l

POWER.("rit !) :r ;r!:r t: :;:r:tt: :hr: !!! MTIO T"U2'. PWER

- ("- f t P. The RCS flow rate'shall also be determined by precision heat balance at least once per 18 months. Within 7 days prior to per-forming the precision heat balance flow sensurement, the instrument-ation used for performing the precision heat balance shall be calibrated. The provisions of 4.0.4 are not applicable for perforcing the precision heat balance flow measurement, h

Limit not applicable during either a THERKR POWER ramp in excess of 5% of RATED THERMAL POWER per minute or a THERMAL POWER step in excess of 10% of i

l l

RATED THERKE POWER.

- Includes a 2.7%[p b u, 3.5Kyuu idflow measurement uncertainty.

YOGTLE UNITS - 1 & 2 3/4 2-13

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T"!S PACE APPt!CACLE TO U"!T 1 0"LY POWER DISTRIBUTION tiMITS - U"!T 1 BASES r

I 3/4.2.5 DNB PARAMETERS (Continued) i The measurement uncertainty for the RCS total flow is based upon performing a precision heat balance flow measurement above 90% RATED THERMAL POWER and i

using the results to correlate the flow indication channels with the measured -

flow.

If a precision heat balance flow measurement is performed below-90% RATED i

THERMAL P0nR, the effect on_ the measurement-uncertainty shall-be taken _into account.. Potential fouling of the feedwater venturis which might not-be

-i detected could bias the results from the precision heat balance in a non-conservative manner. Therefore, a penalty of 0.1%- for undetected feedwater venturi fouling is included in the measurement uncertainty.

Any fouling which might bias the RCS flow rate measurement greater than' O 1% may be detected by monitoring and trending various plant performance _ parameters, if detected, j

action shall be taken before performing subsequent precision heat balance flow measurements, i.e., either the effect of the fouling shall be quantified and j

L accounted-for in the RCS flow rate measurement or the affected venturis shall be cleaned to eliminate the fouling. The indicated RCS flow value of U3,136 gpm.

corresponds to'an analytical value of 382,800 gpm with allowance for measurement and indication uncertainties.

The 12-hour periodic surveillance of these parameters _ through instrument readout-is sufficient to ensure that the parameters are restored within their_-

limits following load changes and other expected transient operation.

The l

18 month periodic measurement of the.RCS total flow rate is adequate to detect l

flow degradation and ensure correlation of the flow indication channels with measured flow such that the indicated percent flow will provide sufficient verification of the flow rate degradation on-a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months basis. _ A change in 7]

indicated percent flow which is greater than the instrument channel inaccuracies i

j-and parallax errors is an appropriate indication of RCS flow degradation.

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i V0GTLE UNITS - 1 & 2 B 3/4 2-4 i

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EFFECTIVE AS Of V0GTLE 2 CYCLE 3 e

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POWER DISTRIBUTION LIMITS

. 3/4.?.5 DNS PARAMETERS LIMITING CONDITION FOR OPERATION 3.2.5 The following DNB-related parameters shall be maintained within the limits:

Reactor Coolant System T,,, (TI-0412, TI-0422,11-0432, TI-0442),

a.

s 592.5*f.

l b.

Pressurizer Pressure (PI-0455A,B&C, PI-0456 & PI-0456A, PI-0457 &

PI-0457A, PI-0458 & PI-0458A), 2 2199 psig*.

l c.

' Reactor Coolant System Flow-(FI-0414, F1-0415, F1-0416, F1-0424 -

F1-0425, F1-0426, F1-0434, F1-0435, F1-0436, F1-0444, F1-0445, F1-0446) 1393,136 gpm**.

l APPLICABILITY: MODE 1.

ACTION:

With any of the above parameters exceeding its limit, restore the parameter to within its limit within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or reduce THERMAL POWER to less than 5% of RATED THERMAL POWER within the next 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

SURVEILLANCE RE0VIREMENTS 4.2.5.1 Reactor Coolant System T,, and Pressurizer Pressure shall be verified to be within-th,eir limits at least once per 12. hours. RCS flow rate shall be monitored for degradation at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .. In the event of flow degradation, RCS flow rate shall be determined by precision heat balance within 7 days of detection of flow degradation.

4.2.5.2 The RCS flow rate indicators shall be subjected to CHANNEL l

CAllBRATION at each fuel loading and at least once per 18 months.

. 4.2.5.3 Af ter each fuel loading, the RCS flow rate shall be determined by precision heat balance within 7 days after exceeding 00% RATED THERMAL POWER. The RCS flow rate shall also be determined by precision heat l

balance at least once per 18 months. Within 7 days prior to per-'

forming the precision heat balance flow measurement, the instrument-ation used for performing the precision heat balance shall be calibrated. The provi: ions of 4.0.4 are not applicable for performing the precision heat balance flow measurement.

Limit not applicable during either a THERMAL POWER ramp in excess of 5% of

- RATED THERMAL POWER per minute or a THERMAL POWER step in excess of 10% of RATED THERMAL POWER.

- Includes a 2.7% flow measurement uncertainty.

THIS PAGE BECOMES APPLICABLE FOLLOWING SHUTDOWN FROM UNIT 2 CYCLE 2 OPERATION.

f

-V0GTLE UNITS - 1 & 2 3/4 2-13

~

.,..r-r.

t 4.

l POWER DISTRIBUTION LIMITS BASES 3/4,2.5 DNB PARAMETERS (Continued) 1 The measurement uncertainty for the RCS total flow is based upon performing a precision heat balance flow measurement above 90% RATED THERMAL POWER and using the results to correlate the flow indication channels with the measured i

fl ow.

If a precision heat balance flow measurement is performed below 90% RATED THERMAL POWER, the effect on the measurement uncertainty shall be taken into account.

Potential fouling of the feedwater venturis which might not be detected could bias the results from the precision heat balance in a non-conservative manner.

Therefore, a penalty of 0.1% for undetected feedwater venturi fouling is included in the measurement uncertainty. Any fouling which i

might bias the RCS flow rate measurement greater than 0.1% may be detected by i

conitoring and-trending various plant performance parameters, if detected, i

action shall be taken before performing subsequent precision heat balance flow r

measurements, i.e., either the effect of the fouling shall be quantified and

[

accounted for in the RCS flow rate measurement or the affected venturis shall be cleaned to eliminate the fouling.

The indicated RCS flow value of 393,136 gpm corresponds to an analytical value of 382,800 gpm with allowance for measurement and indication uncertainties.

i The 12-hour periodic surveillance of these parameters through instrument readout is sufficient to ensure that the parameters are restored within their i

limits following load changes and other expected transient operation.

The l

18 month periodic measurement of the RCS total flow rate is adequate to detect i

flow degradation and ensure correlation of the flow indication channels _with measured flow such that the indicated percent flow will provide sufficient t

verification of the flow rate-degradation on a 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months basis. A change in indicated percent flow which is greater than the instrument channel inaccuracies and parallax errors is an appropriate indication of RCS flow degradation.

f L

L THIS PAGE BECOMES APPLICABLE FOLLOWING SHUTDOWN FROM UNIT 2 CYCLE 2 OPERATION.

{

l l

V0GTLE UNITS - 1 & 2 B 3/4 2-4 j

ML20082J159

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