ML20097E976

Proposed TS Section 3/4.7.7 Re Svc Water Sys

ML20097E976
Person / Time
Site:	Comanche Peak
Issue date:	06/05/1992
From:	TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20097E968	List: ML20097E966 ML20097E976
References
NUDOCS 9206150120
Download: ML20097E976 (7)

Text

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ATTACHMENT 2 PROPOSED STAT 10fl SERVICE WATER SYSTEM TECHNICAL SPECIFICATION P

PDR

.- to TXX-92260

- PAge 1 of 6 PLANT SYSTEMS 3/4.7.4 STATION SERVICE WATER SYSTEM DRAFT LIMITING CONDITION FOR OPERATION t least two independent station service water loops per unit and he cross-c nect between the station service water systems of each unit s 11 be

, OPERABLE.

In addition, the cross-connect valves XSW-0006, XSW-0007, SW-0008, I

! XSW-0028 an XSW-0029 shall be capable of being opened (from the m n control room) to pro e a flow path between the two units.

j APPLICABILITY:

DES 1, 2, 3, and 4.

f ACTION:

Both Units in MODES 1, 3 or 4.

a.

With only one s ation service water loo 'per unit OPERABLE, restore at least two loo per unit to OPERAB status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or for the unit with the noperable statio service water i.,op be in at least HOT STANDBY thin the next. hours and in COLD SHUT 00WN within the following 30 hou b.

With one or more of the rossfconnect valve (s) inoperable and not capsble of being opened r ffi the control room), within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> re-store the valve (s) to OPE LE status or open the affected valve (s),

.and maintain the affecte v ve(s) open; otherwise be in at least HOT

/

STANDBY within the next ho s and in COLD SHUTOOWN within the fol-lowing 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

I One unit in Modes 1, 2, 3 or and one unit s Mode 5 or 6.

i a.

. Verify that at 1 st one pump in the hutdown unit is OPERABLE and l,

available to pr ide service water to e operating unit.

If neither service water ump in the shutdown unit s OPERABLE, restore at least one pump to 0FERABLE status within 72 hou, or place the operating i

unit in at }4ast HOT STANDBY within the nex 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN w thin the following 30 hour3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />s-.

b.

With on service water loop in the operating un1 inoperable, restore two lo s in the operating unit to OPERABLE statu within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 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 /> d in COLD SHUT-3 00 with the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

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c.

W h one or more of the cross-connect valve (s) inoperabl and not

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apable of being opened (from the control room), with 72 h rs restor

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maintain the affected valve (s) open; otherwise place the opera the valve (s) to OPERABLE status or open the affected valve (s and ng unit 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 COL SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

Su h u.<t "A '

COMANCHE PEAK - UNITS 1 AND 2 3/4 7-14

Attachment to TXX-42260 DRAFT n, - e PLANT SYSTEMS cVRVEILLANCE REQUIREMENTS

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ach station ser e water loop shall be demoastrats OPERABLE:

a.

At least once per days by. rifying t3a ch valve (manual,

/

power-operated, or a matic) ervicipq safety-related equipment that is not locked, se ed,orotp#wisesecuredinpositionisin its correct position; 7

b.

Atleastonceper92#aydy 1

4 1,.g cross-connect valves XSW-0006, j

XSW-0007, XSW-000&dSW-0028, anNSW-0029 or verifying that the valves are loc,Ae6 open with power r ved; and 1

c.

At leas per 18 months during shutdo by verifying that each l

sta eh service water pump starts automatica i on a Safety Injection J

t_e s s_

COMANCHE PEAK - UNITS 1 AND 2 3/4 7-15

_ _ _ _ - - _ _ _ _ _ - to TXX-92260 Page 3 of 6 INSERr" A

• 5 PLANT SYSTEMS 3/4.7.4 STATION SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.4.1 At least two independent station service water loops per unit and the cross-connects between the station service water systems of each unit shall be OPERABLE.

APPLICABILITY:

Units 1 and 2 in MODES 1, 2, 3 and 4 ACTION:

a.

With only one station service water loop in a unit OPERABLE, restore at least two loops per unit to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, or for the unit (s) with the inoperable station service water loop, 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, b.

With one or more of the cross-connects inoperable, within 7 days restore the cross-connect (s) to OPERABLE status.

Otherwise, 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEILLANCE RE0VIREMEN_T_S 4.7.4.1.1 Each station service water loop shall be demonstrated OPERABLE:

a.

At least once per 31 days by verifying that each valve (manual, power-operated, or automatic) servicing safety-related equipment that is not locked, sealed, or otherwise secured in position is in its correct position; and b.

At least once per 18 months, by verifying that each station service water pump starts automatically on a Safety injection test signal.

4.7.4.1.2 The cross-connects shall be demonstrated OPERABLE by cycling the cross-connect valves in the flow path or verifying that these valves are locked open at least once per 92 days.

COMANCHE PEAK - UNITS 1 AND 2 3/4 7-14 DRAFT

_ _ - _ - - to TXX-92260 Page 4 of 6 THSERT"h PLANT SYSTEMS LlHITING CONDITION FOR OPERATION 3.7.4.2 At least two independent station service water loops in the operating unit *, at least one station service water pump in the shutdown unit ** and the cross-connects from the OPERABLE station service water pump in the shutdown unit to the station service water loops of the operating unit shall be OPERABLE.

APPLICA31LITY:

Unit 1 (Unit 2) in MODES 1, 2, 3 and 4 Unit 2 (Unit 1) in MODES 5, 6 and defueled ACTION:

a.

With one station service water loop in the operating unit inoperable, restore two loops in the operating unit to l

OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, b.

With one or more of the cross-connects between the OPERABLE station service water pump in the shutdown unit and the station service water loops in the operating unit inoperable, within 7 days restore the inoperable valve (s) to OPERABLE status. Otherwise, place the operating unit 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, c.

If neither station service water pump in the shutdown unit is OPERABLE, restore at least one pump to OPERABLE status within 7 days or place the operating unit 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

SURVEIL (ANCE REOUIREMENTS 4.7.4.2.1 Each station service water loop in the operating unit shall be demonstrated OPERABLE per the requirements of Specification 4.7.4.1.1.

4.7.4.2.2 The cross-connect (s) between the OPERABLE station service water pump in the shutdown unit and the station service water loops in the operating unit shall be demonstrated OPERABLE by cycling the cross-connect valves in the flow path or verifying that these valves are locked open at least once per 92 days.

• A Unit in MODE 1, 2, 3 or 4 is designated as the " operating unit".

• • A unit in MODE 5, 6 or defueled is designated as the " shutdown unit".

COMANCHE PEAK - UNITS 1 AND 2 3/4 7-15 DRAFT

n tac a nt 2 ta Txx-N N N o. 3 ) nf 6 PLANT SYSTEMS BASES 3/4.7.3 COMPONENT COOLING WATER SYSTEM The OPERABILITY of the Component Cooling Water System ensures that suf-ficient cooling capacity is available for continued operation of safety-related equipment during normal and accident conditions.

The redundant cooling capacity of this system, assuming a single failure, is consistent with the assumptions used in the safety analyses 4 Wil be.,

A Unit in Mo.bt.1,2,3 oY de si3114ted e oferaO4 God A Wt 3/4.7.4 STATION SERVICE WATER SYSTE;4 o McDE 9, C cn de wie wat be 4

NNd'Decc i r" sNM b,

The OPERABILITY of the Station Service Water System ensures that suffi-i cient cooling capacity is available for continued operation of safety related equipment during normal and accident conditions.

The redundant cooling capa-city of this system, assuming a single failure, is consistent with the assump-tions used in the safety analyses. ~

s Hon In the event of a total loss of service water in one unit at Comanche Peak, back@trt cooling capacity is ava lable via a cross-connect between the twogh q

units.

The OPERABILITY of the unit cross-connect along with agservice water pump in the shutdown unit ensures the availability of sufficient redundant cooling capacity for the operating unit.

The Limiting Condition of Operation will ensure a significant risk reduction as indicated by the analyses of a loss

& M service water systemeccid:nt.

The surveillance requirements ensure the

. short anct long-term OPERABILIT of th service water system and cross-connect between the two units Cven 60hh"N d (<ess Camb u NS ^id The ter system cross-connect between the two units consists of appropriate piping, valves ed N trr:ntatf0 crest-cornect h$' he ischarge 5

oT thejservice water pumps of the two units.

8, Operat h; the cross-connec, U@

thc r?p'y ddditional redundant cooling capac ty from one unit is availab e to the servi water system of the other unit.

3/4.7.5 ULTIMATE HEAT SINK The limitations on the ultimate heat sink level and temperature ensure that sufficient cooling capacity is available to either:

(1) provide normal cooldown of the facility or (2) mitigate the effects of accident conditions within acceptable limits.

The limitations on minimum water level is based on providing a 30-day cooling water supply to safety-related equipment without exceeding its design basis temperature and is consistent with the recommendations of Regulatory Guide 1.27, " Ultimate Heat Sink for Nuclear Plants," Rev. 2 (January 1976).

The limitation on maximum temperature is based on the maximum allowable compo-nent temperatures in the Service Water and Component Cooling Water Systems, and the requirements for cooldown.

The limitation on average sediment depth is based on the possible excessive sediment buildup in the service water intake channel.

COMANCHE PEAK - UNIT 1 8 3/4 7-4

p.

AttechnentJ2 to TKX-92260-

- Pega 6,ot f PLANT SYSTEMS DRAFT BASES INS E R T _ ' S ' _

1 A cross-connect valve is OPERABLE if it can be cycled or is locked-

~

open;.however, at least one cross-connect: valve between units is ed to be maintained closed in accordance with GDC-5 unless r

requir.e due to total-loss of SSW pumps.for either unit.

The OPERABLE pump.is manually realigned and flow balanced to provide cooling to essential heat loads, L (Vir t\\us I

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