ML20141G713

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Proposed Tech Specs Expanding Applicability of TS 3.7.1.3 to Include Mode 4 Operational Requirements & Maintains 91 Percent Minimum Condensate Storage Pool Level Previously Requested for Modes 1,2 & 3
ML20141G713
Person / Time
Site: Waterford Entergy icon.png
Issue date: 07/07/1997
From:
ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20141G700 List:
References
NUDOCS 9707100200
Download: ML20141G713 (10)
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Text

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i NPF-38-179 L

ATTACHMENT B Proposed Changes l'

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9707100200 970707 PDR ADOCK 05000382 P PDR ,

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1 PLANT SYSTEMS CONDENSATE STORAGE POOL 1

LIMITING CONDITION FOR OPERATION '

3.7.1.3 The condensate storage pool (CSP) shall be OPERABLE with a minimum contained volume of at least 91% S2%-indicated level (170 ^^^ ;;2!!Onc).* I I

APPLICABILITY: MODES 1,2,3 and 4.

l ACTION:  !

l In MODES 1,2. and 3: l l

With the condensate storage pool inoperable, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> either;

a. Restore the CSP to OPERABLE status or be in at least HOT STANDBY within the I next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, or
b. Demonstrate the OPERABILITY of the wet cooling tower basins as a backup supply 1 to the emergency feedwater pumps and restore the condensate storage pool to OPERABLE status within 7 days or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

In MODE 4:

With the condensate storaae pool inooerable. within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> restore the CSP to OPERABLE status or be in at least COLD SHUTDOWN within the next 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

SURVEILLANCE REQUIREMENTS l

4.7.1.3.1 The condensate storage pool shall be demonstrated OPERABLE 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 the contained water volume is within its limits. "*-- *- ~^' '- *- -"'"'" -^"- '^' *-

e' e~,;:ncy 'eetenter pumps- l i

4.7.1.3.2 The wet cooling tower basins shall be demonstrated OPERABLE at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />  ;

whenever the wet cooling tower basins are the supply source for the emergency feedwater pumps by l verifying:

a. That each automatic and/cr non-automatic valve in the flow path from the wet cooling tower basins to the emergency feedwater pumps is open or OPERABLE.
b. That the wet cooling tower basins contain a minimum contained water volume of 170,000 gallons.
c. That both auxiliary component cooling trains required by Specification 3.7.3 are l OPERABLE and ',n operation.
  • In MODE 4. the CSP shall be OPERABLE with a minimum contained volume of at least 11%

indicated level.

WATERFORD - UNIT 3 3/47-6 AMENDhENT NO.

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PLANT SYSTEMS BASES 3/4.7.1.2 EMERGENCY FEEDWATER SYSTEM The OPERABILITY of the emergency feedwater system ensures that the Reactor

, Coolant System can be cooled down to less than 350 F from normal operating conditions in the event of a totalloss-of-offsite power.

Each electric-driven emergency feedwater pump is capable of delivering a total feedwater flow of 350 gpm at a pressure of 1163 psig to the entrance of the steam generators.

, The steam-driven emergency feedwater pump is capable of delivering a total feedwater flow of 700 gpm at a pressure of 1163 psig to the entrance of the steam generators. This capacity is

sufficient to ensure that adequate feedwater flow is available to remove decay heat and reduce the Reactor Coolant System temperature to less than 350'F when the shutdown cooling system

} may be placed into operation.

The surveillance requirement to verify the minimum pump discharge pressure on recirculation flow ensures that the pump performance curve has not degraded below that used to show that the pumps meet the above flow requirements and is consistent with the requirements of ASME Section XI.

3/4.7.1.3 CONDENSATE STORAGE POOL The OPERABILITY of the condensate storage pool [QEP.1 with the minimum water volume ensures that sufficient water is available (173.500 aallons) to cool the Reactor Coolant System to shutdown cooling entry conditions (350 F) following any design basis accident.

Additional makeup water is stored in the wet cooling tower (WCT) basins providing the capability to maintain HOT STANDBY conditions for at least an additional 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> prior to initiating shutdown cooling. The total makeup capacity also provides sufficient cooling for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> until shutdown cooling is initiated in the event the coc!!ng tetecr: ultimate heat sink sustains tomado damage concurrent with the tomado event. accident er if n:ture! circe!: tion coc!dev/9 is re';uired. The CSP contained water volume limit (91% indicated in MODES 1. 2.

and 3) includes an allowance for water not usable because of tank di: charge !ccation vortexina arid instrumentation uncertainties. er other phy:!ce! cher:c'esstes. This provides an assurance that a minimum of 170.000 aallons of water is available in the CSP for the emeraency feedwater system and that 3.500 callons of water is available in the CSP for use by the component coolina water makeup system. The CSP contained water volume limit (11%

indicated in MODE 4) includes an allowance for water not usable because of vortexina and.

instrumentation uncertainties. This provides an assurance that a minimum of 3.500 aallons of water is available in the CSP for the component coolina water makeup system. If natural circulation is reauired. the combined capacity (WCT and CSP) is sufficient to maintain the plant at HOT STANDBY for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> followed by a cooldown to shutdown cooling entry conditions assuming the availability of only onsite power or only offsite power, and the worst single failure (loss of a diesel generator or atmospheric dump valve). This requires approximately 275,000 gallons and complies with BTP RSB 5-1.

WATERFORD - UNIT 3 B 3/4 7-2 AMENDMENT NO.

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NPF-38-179 1

l ATTACHMENT C CSP Level Comparison l

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Attachment C CSP Level Comparison i

Modes 1,2,and 3 NPF-38-179 NPF-38-179 NPF-38-179 July 17,1996 Supplement Supplement June 3,1997 (latest) 100 % - 100 % - 100 % -  ;

91 % Requested _ 91 % Requested _ 91 % Requested -

T.S. Value V 90.87 % T.S. Value V9 T.S. Value 90.90 %

l.66 % CCW Makeup 4.46 % Instrument -< 3.8 % CCW Makeup Y (3,500 gal)

' _ 4.% % Instrument Uncertainty

-4.% % Instrument Uncertamty y I

_ 5.7 % Vortex Prevention (w/o vortex suppression) g

  1. 82% Existing T.S. Value ___

3R % Ve %s 82% Existing T.S. Value - 82% Existing T.S. Value - g 3;,)

80.71% (170,000 gal) -

y 80.71% (170,000 gal)-

1.53 % Vortex Prevention g (w/o vortex suppression) 80.71% (170,000 galj-0% - 0% --

0% -

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Attachment C CSP Level Comparison Mode 4 NPF-38-179 Supplement (Latest) 100 %

_l 11 % Requested T.S. Value _

g 10.19 %

- 4.% % Instrument Uncertainty 5

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_ 3.57 % Vortex Prevention 1.66 *A CCW Makeup _ M (3,500 gal) 0% -

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R NPF-38-179 ATTACHMENT D d

SAFETY ANALYSIS OF PROPOSED CHANGE i

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I SAFETY ANALYSIS OF PROPOSED CHANGE NPF-38-179 i Safety Analysis '

The proposed change shall be deemed to involve a significant hazards consideration if i there is a positive finding in any of the following areas:

1. Will operation of the facility in accordance with this proposed change involve a }

significant increase in the probability or consequences of an accident previously evaluated?

Response: No.

Increasing the minimum required Condensate Storage Pool (CSP) level to 91 percent will insure that the minimum required 170,000 gallons of water is i available to supply the Emergency Feedwater System and that 3,500 gallons of j water is available for use by the Component Cooling Water Makeup System in l Modes 1, 2, and 3. Maintaining a minimum required CSP level of 11 percent will i insure that 3,500 gallons of water is available for use by the Component Cooling Water Makeup System in Mode 4. Maintaining the minimum required water volume will not increase the probability of any accident previously evaluated.

Additionally, it will not affect the consequences of any accident. Maintaining a minimum required CSP level will ensure that the system remains within the bounds of the accident analysis. Therefore, the proposed change will not involve a significant increase in the probability or consequences of any accident previously evaluated.

2. Will operation of the facility in accordance with this proposed change create the possibility of a new or different type of accident from any accident previously evaluated?

Response: No.

Increasing the minimum water volume of the CSP from 82 percent to 91 percent in Modes 1,2, and 3 does not create a possibility for a new or different kind of accident. Maintaining a minimum water volume of the CSP at 11 percent in Mode 4 does not create a possibility for a new or different kind of accident. The CSP will be operated in the same manner as previously evaluated. Therefore, the proposed change will not create the possibility of a new or different kind of accident from any accident previously evaluated.

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3. Will. operation of the facility in accordance with this proposed change involve a significant reduction in a margin of safety?

Response: No. '

Operation in accordance with this proposed change will ensure that the minimum l

contained water volume of the CSP will remain adequate under all conditions. l This will improve the present margin of safety. Therefore, the proposed change )'

will not involve a significant reduction in a margin of safety.

Safety and Sionificant Hazards Determination Based on the above safety analysis, it is concluded that: (1) the proposed change does i not constitute a significant hazards consideration as defined by 10CFR50.92; and (2) I there is a reasonable assurance that the health and safety of the public will not be i endangered by the proposed change; and (3) this action will not result in a condition which significantly alters the impact of the station on the environment as described in the NRC final environmental statement.

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