ML20217R287

Proposed Tech Specs,Modifying TS 3.2.5 Action Statement to Require Power Reduction to Less than 5% of Rated Thermal Power within Four Hrs If RCS Flow Rate Is Less than Specified Limit for Greater than Two Hrs

ML20217R287
Person / Time
Site:	Davis Besse
Issue date:	08/26/1997
From:	CENTERIOR ENERGY
To:
Shared Package
ML20217R284	List: ML20217R283 ML20217R287
References
NUDOCS 9709040395
Download: ML20217R287 (4)

Text

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Ae f 3/4 FOR NF0 Mil 0N DM LIMITING CONDITIONS FOR OPEFATION WD SURVEILLMCE. RIOUIFIXDffs 1/4.0 AftLICASILITY LIMIT NC CONDITION FOR OPEFATION 3.0.1 Limiting Conditions for Operation and ACTION requirements shall te appitcable during the OPEFATICNAL MODES or other conditions specified for each specification. ,

3.0.2 Adherence to the requirements of the Liatting Condition for Operation and/or associated t.CTION vithin the specified time . interval shall constitute ccec11ance with the specification. In the event the Limiting Condition for Operation is restored prior to expiration of the specified time interval, completten of the ACTION statement is not required.

3.0.3 vhan a Limiting condition for operation is not set, except as provided in the associated ACTION requirements. action shall be initiated within i hour to place the unit in a M00t in which the Specification does not apply by placing it. as applicaole. in (

I 1.

At least HOT STAND 8T vithin the nexc 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

2. At least HOT SElfrDOVN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. .and i

3. At least COLD set @0VW within the subsequent 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

Vhere corrective seasures are' completed that petuit operation under the ACTICH requirements, the ACTION any be takaa in accordance with the specified tise limits as seasured from the time of failure to seet the Limiting Condition for Operation. Exceptions to these requirements are stated in the individual Specifications.

3.0.6 Entry into an OPEFATIONAL N0DE or other specified applicability condition shall not be made unless the conditions of the Limiting Condition for Operation are est without reliance on provisione contained in the ACTION statements unless otherwise excepted. This provision shall not prevent passage through OPEFATIONAL N0015 as required to comply with ACTION statements.

3.0.5 vhen a systes. subsystes. train, component or device is determined to be inoperable solely because its emergency power source is inoperable. or solely because its normal power source is inoperable, it say be considered CFEFABLE for the purpose of satisfying the requirements of its applicable Limiting Condition for Operation providadt (1) its correaMac normal or enargsacy power source is CFEFAalts and (2) all of its redundant.systea(s), subsystee(s), train (s),

coeponent(s) and device (s) are OPERABLE. or lihavise satisfy the requirements of this specification. Unless both conditions (1) and (2) are satisfied, within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> action shall be initiated to place the unit in a M005 in which the applicable Limiting condition for Operation does not apply by placing it as applicable in:

1. At least 80T STAND 8T vithin che nexc .6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

2. At least HOT SHUTDOVN vithin the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and l

3. At least COLD SHUTDOVN vithin the subsequent 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

This Specification is not toplicahla in MODES 5 or 6.

DAVI5-Btsst. UNIT t 3/4 0-1 Aegnt j No' W' 9709040395 970826 PDR P ADOCK 05000346 PDR

LAR 97 0009 Page 7 l

POWi!R DISTRIBUTION I IMITS

- DNB PARAMETERS LIMITING CONDITION FOR OPERATION 3.2.5 The following DNB related parameters shall be maintained within the limits shown on Table 3.2-2.

a. Reactor Coolant ilot Leg Temperature

b. Reactor Coolant Prescure

c. Reactor Coolant Flow Rate i l APPLICABILITY: MODE 1 ACTION:

If,aggparameter a+rbabove exceeds its limit, restore the parameter to within its limit within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or reduce THERMAL POWER to less than 5% of RATED TIIERMAL POWER within l the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

!f p=:=::= c = : d its4imitr ehhen J

4. Ret =: the p:=m:::: :c !%!n its4imit-with'n 2 heum, or 2.

Li=!! THERMAIJOWER a: !:=: 2% b:!c." RATED THERMAL PO"/ER for :=h !%

param::= : i: cc::!d i::!!=h for fc= pump cp:=:!cn ./li! S: n: t i Scum, er !!=it T44ERMAL POWER :: != : 2% belcw 75% of RATED T44ERMAirPOWER for = h 1% p===:= c is cu :!d !!:!!=it-fer 3 pamp cpe=tien "ithin the n=: i hc= .

SURVEILLANCE REQUIREMENTS 4.2.5.1 Each of the parameters of Table 3.2-2 shall be verified to be within their limits at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

4.2.5.2 The Reactor Coolant System total flow rate shall be determined to be within its limit by measurement at least once per 18 months.

DAVIS BESSE, UNIT 1 3/4 2-13 Amendment No. 64,123

• l

, TS PAGE Pil0VillED

{!:

Q FORINf0!PdiAliDN DE DN8 MARCIN i!

yg Required Measured Required Measured I

w Paraseters with Parameters with Foer Reactor Three Reactor Coolant Fusps Coolant Fueps Parameter operating operating Reactor Coolant Bot Leg Temperature T F (610 III E $610 y Reactor Coolant Pressore, psig.III 22062.7 a- >2058.7(I) y Reactor Coolank Flow Rate, speI3I 2389,500

• >290,957 g III Applicable tc the loop with 2 Reactor Coolant Fumps Operating.

gh (2) Limit not applicable during either a THERMAL POWER ramp f acrease in excess of SI of RATED THERMAL g POWER per minute or a THERMAL F09ER step increase of greater than 10% of RATED THERMAL POWER.

gn I3I -

- g: These minimum required measured flows include a flow rate uncertainty of 2.5I, and are based on a g- minimum of 52 lumped burnable poison rod assemblies la place in the core.

YU C'

u,

. LAR 97 0009 Page 9 POWER DISTRIBUTION L1 HITS b.

ENNFMUBNU=

The measurement of enthalpy rise hot channel factor FN increased by 5 percent to account for measurement errofg' shall be For Condition Il events, the core is protected from exceeding the values given in the bases to specification 2.1 locally, and from going beinw the minimum allowable DNB ratio by automatic protection on power, AXIAL POWER IMBALANCE pressure and temperature. Only conditions 1 through 3, abnve, are mandatory since the AXIAL POWER IMBALANCE is an explicit input to the reactor protection system.

The QUADRANT POWER TILT limit assures that the radial power distribution satisfies the design values used in the power capability analysis. Radial i

power power during distribution measurements are made during startup testing and periodically operation.

The QUADRANT POWER TILT limit at which corrective actinn is required provides DNB and linear heat generation rate protection with x-y plane power tilts, in the event the tilt is not corrected, the margin for uncertainty on Fn is reinstated by reducing the power by 1 percent for each percent of tilt in excess of the limit.

3/4.2.5 DNB PARAMETERS The limits on the DNB related parameters assure that each of the parameters are maintained within the nonnal steady state envelope of operation assumed in the transient and accident analyses. The limits are consistent with the FSAR initial assumptions and have been analytically demonstrated adequate to main-tain a minimum DNBR greater than the minimum allowable DNB ratio throughout each analyzed transient.

The 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> periodic surveillance of these parameters through instrunient read-out 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 using delta P instrumenta-tion is adequate to detect flow degradation and ensure correlation of the flow indication channels with measured flow such that the indicated percent flow will provide sufficient verification of flow rate on a 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> basis.

DAVIS-BESSE, UNIT 1 B 3/4 2-3 Amendment No. 33./E,149