ML20083R037

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Proposed Tech Specs,Clarifying LCO by Indicating in Section 3.7.1.3, Demineralized Water Storage Tank That Total Vol of 334,000 Gallons Consists of Usable & Unusable Vol in Tank
ML20083R037
Person / Time
Site: Millstone Dominion icon.png
Issue date: 05/19/1995
From:
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20083R035 List:
References
NUDOCS 9505260322
Download: ML20083R037 (8)
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Text

Docket No. 50-423 )

B15146 ,

1 l

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Attachment 1 Millstone Nuclear Power Station, Unit No. 3 Proposed Revision to Technical Specifications Domineralized Water Storage Tank Marked Up Pages May 1995 9505260322 950519 PDR ADOCK 05000423 l p PDR

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  • - l

.- PLANT SYSTEMS '

JAN 31 1986 DEMINERALIZED WATER STORAGE TANK LIMITING CONDITION FOR OPERATION 3.7.-l.3 The domineralized water storage tank (DWSI) shall be OPERABLE with a contained water volume of at least 334,000 gallonfof water.

APPLICABILITY: MODES 1, 2, and 3.

ACTION:

With the DWST 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 DWST to OPERABLE status or be in at least HOT STAND 8Y ,

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 />, or  !

b. Demonstrate the OPERABILITY of the condensate storage tank (CST) as a  ;

backup supply to the auxiliary feedwater pumps and restore the DWST  ;

to OPERABLE status within 7 days or be in at least HOT STANOBY 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 />.

SURVEILLANCE REQUIREMENTS  !

4.7.1.3.1 The DWST 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 t.he contained water volume is within its limits when the tank is the ,

supply source for the auxiliary feedwater pumps.

4.7.1.3.2 The condensate storage tank 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 /> bv verifying'that the combined volume of both the DWST and C CST is at least 634.00D3 gallons of water whenever the condensate storage tank and DWST are the supply source for the auxiliary feedwater pumps.

3%H , 00 0 '

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MILLSTONE - UNIT 3 3/4 7-6 ,

63/f

=

. PLANT SYSTEMS JAN 311986 BASES . . -

SAFETY VALVES (Continued) .

109 = Power Range Neutron Flux-High Trip Setpoint for four loop r operation, t

80 = Maximum percent of RATED THERMAL POWER permissible by i P-8 Setpoint for three loop operation, '

X = Total relieving capacity of all safety valves per steam '

line in 1bs/ hour, and Y = Maximum relieving capacity of any one safety valve in  !

lbs/ hour 3/4.7.1.2 AUXILIARY FEEDWATER SYSTEM l

I

. The OPERABILITY of the Auxiliary Feedwater System ensures that the Reactor Coolant System can be cooled down to less than 350*F from normal operating or j

accident conditions coincident with a total loss-of-offsite power.

The auxiliary feedwater system is capable of delivering a total feedwater l flow of 480 gpa at a pressure of 1236 psia to the entrance of at least three  ;

steam generators while allowing for (1) any spillage through the design worst-case break of the Normal feedwater line, (2) the design worst-case single fail- i ure; and (3) recirculation flow. 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 at which point the Residual Heat ~

Removal mAy cowem os System may be placed into operation.T e w m rssov4me. w m l ro ope 4 Arc W fA S A aEL. u m* vc em ww -

stemosA w srce rott. c o'c==.s a ,sewov a so* y, i 3/4.7.1.3 DEMINERALIZED WATER STORAGE TANK The OPERABILITY 3 the domineralized water storage tank with the minimum water volume ensures that sufficient water is available to maintain the RCS at HOT STANDBY conditions for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> with steam discharge to the atmosphere concurrent with total loss-of-offsite power, and with an additional 6-hour cooldown period to reduce reactor coolant temperature to 350*F. The contained water discharge volume linelimit includes location an allowance or other for water not usable because of tank )

physical characteristics.

k j[ m i 3/4.7.1.4 SPECIFIC ACTIVITY e

The limitations on Secondary Coolant System specific activity ensure that-the resultant offsite radiation dose will be limited to a small fraction of 10 CFR Part 100 dose guideline values in the event of a steam line rupture.

This dose also includes the effects of a coincident 1 gpa primary-to-secondary tube leak in the steam generator of the affected steam line. These values are consistent with the assumptions used in the safety analyses. .'

4 MILLSTONE - UNIT 3 B 3/4 7-2 03M

Insert 'A' to Page B 3/4 7-2 The OPERABILITY of the demineralized water storage tank and the volumetric requirements are based upon Safety Grade Cold Shutdown (SGCS). The water volume that is required ensures that sufficient water is available to maintain the RCS at HOT STANDBY condition for 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> with steam discharge to the atmosphere concurrent with total loss-of-offsite power, and with an additional 7 hour8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> cooldown period to reduce the reactor coolant temperature to 350*F when RHR is introduced, and for the cooldown below 350*F when steaming continues in *

)arallel with the RHR operation for approximately 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> until the entire leat load can be cooled by RHR. The contained water volume limit of 334,000 gallons in the DWST includes an allowance for water not usable because of the tank discharge line location, or other physical characteristics of the tank and an allowance for 30 minutes of spillage from the tank.

When combining the volume of the condensate storage tank (CST) with the DWST, an unusable CST volume of 30,000 gallons must be included. Thus the combined volume of both the CST and the DWST must be at least 364,000 gallons to satisfy the requirements of Section 4.7.1.3.2 of the Technical Specification.

1

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. I Docket No. 50-423 B15146 i

I Attachment 2 Millstone Nuclear Power Station, Unit No. 3 Proposed Revision to Technical Specifications Domineralized Water Storage Tank Retyped Pages f

t i

May 1995

. PLANT SYSTEMS  :

DENINERALIZED WATER STORAGE TALK LIMITING C0lWITION FOR OPERATION 3.7.1.3 The domineralized water storage tank (DWST) shall be OPERABLE with a contained water volume of at least 334,000 gallons

  • of water. l APPLICABILITY: NODES 1, 2, and 3.

ACTION:

With the DWST 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 DWST to OPERABLE status 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 />, or

b. Demonstrate the OPERABILITY of the condensate storage tank (CST) as a backup supply to the auxiliary feedwater pumps and restore the DWST 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 />.

SURVEILLANCE REQUIREMENTS 4.7.1.3.1 The DWST 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 when the tank is the supply source for the auxiliary feedwater pumps.

4.7.1.3.2 The condensate storage tank shall be demonstrated OPERABLE av 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 that the combined volume of both the DWST and CST is at least 364,000 gallons of water whenever the condensate storage tank l and DWST are the supply source for the auxiliary feedwater pumps.  ;

I

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  • Includes unusable volume. l l l

NILLSTONE - UNIT 3 3/4 7-6 Amendment No.

0310 i

PLANT SYSTEMS RASES SAFETY VALVES (Continued) 109 = Power Range Neutron Flux-High Trip Setpoint for four loop operation, 80 - Maximum percent of RATED THERMAL POWER permissible by P-8 Setpoint for three loop operation, X - Total relieving capacity of all safety valves per steam line in 1bs/ hour, and  ;

Y - Maximum relieving capacity of any one safety valve in 1bs/ hour 3/4.7.1.2 AUXILIARY FEEDWATER SYSTEM i The OPERABILITY of the Auxiliary Feedwater System ensures that the Reactor Coolant System can be cooled down to less than 350'F from normal operating or accident conditions coincident with a total loss-of-offsite power.

The auxiliary feedwater system is capable of delivering a total feedwater flow of 480 gpm at a pressure of 1236 psia to the entrance of'at least three steam generators while allowing for (1) any spillage through the design worst-

, case break of the Normal feedwater line, (2) the design worst-case single fail- .

ure; and (3) recirculation flow. This capacity is sufficient to ensure that I adequate feedwater flow is available to remove decay heat and reduce the Reactor Coolant System temperature to less than 350'F at which point the Residual Heat Removal System may be placed into operation. The auxiliary feedwater system may

!. continue to operate in parallel with the residual heat removal system for cooldown below 350*F.

3/4.7.1.3 DEMINERALIZED WATER STORAGE TANK The OPERABILITY of the demineralized water storage tank and the volumetric requirements are based upon Safety Grade Cold Shutdown (SGCS). The water volume

, that is required ensures that sufficient water is available to maintain the RCS at HOT STANDBY condition for 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> with steam discharge to the atmosphere concurrent with total loss-of-offdte power, and with an additional 7 hour8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br /> cooldown period to reduce the reactor coolant temperature to 350*F when RHR is introduced, and for the cooldown below 350*F when steaming continues in parallel i with the RHR operation for approximately 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br /> until the entire heat load can i be cooled by RHR. The contained water volume limit of 334,000 gallons in the DWST includes an allowance for water nc,t usable because of the tank discharge i line location, or other physical characteristics of the tank and an allowance for 30 minutes of spillage from the tank.

When combining the volume of the condensate storage tank (CST) with the DWST, an unusable CST volume of 30,000 gallons must be included. Thus the combined volume of both the CST and the DWST must be at least 364,000 gallons to satisfy the requirements of Section 4.7.1.3.2 of the Technical Specification. I

]

MILLSTONE - UNIT 3 8 3/4 7-2 Amendment No.

, 0320 ll

m a

. PLANT SYSTEMS BASES 3/4.7.1.4 SPECIFIC ACTIVITY The limitations on Secondary Coolant System specific activity ensure that the resultant offsite radiation dose will be limited to a small fraction of 10 CFR Part 100 dose guideline values in the event of a steam line rupture.

This dose also includes the effects of a coincident 1 gpm primary-to-secondary tube leak in the steam generator of the affected steam line. These values are consistent with the assumptions used in the safety analyses.

MILLSTONE - UNIT 3 B 3/4 7-2a Amendment No.

0320

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