ML20042F806

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Proposed Tech Specs Re Limiting Condition for Operation for Svc Water Sys
ML20042F806
Person / Time
Site: Brunswick  Duke Energy icon.png
Issue date: 05/08/1990
From:
CAROLINA POWER & LIGHT CO.
To:
Shared Package
ML20042F803 List:
References
NUDOCS 9005100015
Download: ML20042F806 (16)


Text

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ENCIDSURE 3  :

BRUNSWICK STEAM ELECTRIC PLANT, UNITS 1 AND 2 NRC DOCKETS 50 325 6 50 324 ,

OPERATING LICENSES DPR 71 & DPR-62 ,

REQUEST FOR LICENSE AMENDMENT ,

.i SERVICE WATER SYSTE'.i ,

l TECHNICAL SPECIFICATION PAGES - UNIT 1 1

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9005100015 900308 PDR ADOCK 05000324 P PDC ,

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PLANT SYSTEMS SERVICE WATER SYSTEM a

LIMITING CONDITION FOR OPERATION

-3.7.1.2 ^: er--ter ----"rr-"'---'-'---' ' " m "

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ast thret OPERABLE service water pumps.

APPL ABILITY: CONDITIONS 1, 2, 3, 4, and 5.

ACTION:

a. In COND ION 1, 2 or 31 d 1. With ordy two service water pumps OPERABLE, restore q pumps to\0PERABLE status within 7 days or be in at east least three HOT SHUTDOWN within thesnext '12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN wit n the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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2. With only one se'evice water pump OPERABLE, r store at least two pumps

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to OPERABLE statu'st within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and res re at least three pumps to OPERABLE status 'within 7 days f rom th time of the initial loss or

) be in at least HOT SRQTDOWN within the ext 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the fol wing 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />,s.

L  % b. In Condirion 4 or 5: ,

j 1. With only one service water p p OPERABLE, restore at least two

% service water pumps to OPE ' status within 7 days or declare the y Core Spray System, the LPC Systein, and the diesel generators

- g, inoperable and take the TION requ'kred by Specifications 3.5.3.1,

  • - 3. 5. 3. 2, and 3. 8.1. 2.

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y 2. With the service wa e system nuclear he er inoperable, operation U may continue prov ed that the Unit No. 2 rwice water nuclear d header is OPE with at least three OPE Unit No. 2 service Q water.pumpei store the service water. system uclear header to

@y OPERABLE st a within 14 days or declare the d sel generators l inoperable ad take the ACTION required by Specif ation 3.8.1.2.

3. With t service water system nuclear header inoperab e, operation atinue provided that the service water-system con entional 1

- may '

he er is in operation with at least two service water p ps p

O RABLE.* Restore the service water systen nucinar heade to 1-PERABLE status within 14 days or declare the Core Spray Sys e and LPCI System inoperable and.take the ACTION required by Specifi tions

3. 5. 3.1 and 3. 5. 3. 2.

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PLANT SYSTEMS SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION UNIT 1 3.7.1.2 The service water system shall be OPERABLE with at least:

In OPERATIONAL CONDITIONS 1, 2, and 3 Two OPERABLI nuclear service water pumps, and two OPERABLE conventional service water pumps -capable of supplying the nuclear and conventional headers.

In OPERATIONAL CONDITIONS 4 AND 5 '

Three OPERABLE site nuclear service water pumps; and two OPERABLE Unit 1 service water pumps, nuclear and/or conventional, powered from separate emergency buses and capable of supplying the nuclear header.

APPLICABILITY: OPERATIONAL CONDITIONS 1, 2, 3, 4, and 5 ACTION:

a. In OPERATIONAL CONDITION 1, 2, or 3:
1. With two OPERABLI conventional service water pumps and only one nuclear service water pump OPERABLE, restore the remaining nuclear service water pump to OPERABLE status within 7 days or be in HOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and COLD SKUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
2. With no OPERABLE-nuclear service water pumps, regardless of conventional service water pump status, be in at least HOT SKUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

3.- With two OPERABLI nuclear service water pumps and only one conventional service water pump OPERABLI, restore at least one additional conventional service water pump to OPERABLE status within 7 days or be in HOT SHUTDOWN within 12 and COLD shutdown within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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4. With two OPERABLE nuclear service water pumps and r conventional service water pump OPERABLE, restore at least one conventional service water pump to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and restore the remaining conventional service water pump to OPERABLE status within 7 days from the time of the loss of the: first pump. Othe rwise , be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SKUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
5. With only one nuclear service water pump and one conventional service water pump OPERABLE, restore at least one additional service water pump, nuclear or conventional, to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and restore the remaining service water pump to OPERABLE status within 7 days from the time of the loss of the first pump. Otherwise, be in at least HOT SNUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and-in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
6. With one- OPERABLE nuclear service water pump and no OPERABL2. conventional service water pumps, be in at ,

least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SNUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />,

b. In OPERATIONAL CONDITION 4 or 5:
1. With-one less than the required number of nuclear service water pumps OPERABLE per site, restore at least one additional nuclear service water pump to OPERABLE status within 14 days or declare the- diesel generators inoperable and take the ACTION required by Specifications 3.8.1.1 or 3.8.1.2 as appropriate.
2. With the service water system nuclear header inoperable, or no Unit 1 nuclear service water pumps operable, operation may continue provided that-the service water system conventional header is OPERABLE with at least two conventional service water pumps OPERABLE. Restore the service water system nuclear header to OPERABL2 status within 14 days or declare the Core' Spray System and LPCI-System inoperable and take the ACTION required by Specifications 3.5.3.1 and' 3.5.3.2. Also, declare the diesel generators inoperable and take.the ACTION required by Specifications 3.8.1.1 or 3.8.1.2 as appropriate.-
3. With less than two OPERABLE site nuclear service water pumps, declare the diesel generators inoperable and take the ACTION required by Specif1:ations 3.8.1.1 or 3.8.1.2 as appropriate.

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.,. , 4. With only one. Unit- 1~ service water pump OPERABLE, restore at least one additional Unit 1 pump, either *

' 'nucigar or conventional, powered from a separate emergency bus, to OPERABLE status within 7 days or-- '

declare the Core Spray System'and the LPCI system' i inoperable and take thc ACTION required by-Specifications'3.5.3.1 and~3.5.3.2. l t

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s ..- eunan stansnq BASES 3/4.7.1 SERVIC WATER SYSTEMS

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3/4.7.2 CORTROL R00M E4ERGENCY FILTRATION SYSTEM I

The OPERABILITY of the control room ventilation system ensures that 1) the ambient air temperature does not. exceed the allowable temperature for continuous duty rating for 'the equipment and instrumentation cooled by this system and 2) the control room will remain habitable for operations personnel ,

during and following all credible ac:ident conditions. The OPERABILITY of this system in conjunction with control room design provisions is based on limiting the radiation exposure to personnel occupying the control room to 5 rem or less whole body, or its equivalent. This limitation is consistent with the requirements of General Design Criteria 10 of Appendix "A", 10 CPR Part 50.

3/4.7.3 FLOOD PROTECTION ,

The limitation- on flood protection ensures that facility protective actions will be taken and operation will be terminated in the event of flood ,

conditions. The limit of elevation 17'6" Mean Sea L4 vel is based on the maximum elevation at which facility flood control measures provide protection to safety-related equipment.

1 3/4.7.4 REACTOR CORE ISOLATION COOLING SYSTEM The reactor core isolation cooling system (RCICS) is provided to assure .

adequate core cooling in the event of reactor teolation from its primary heat sink and the lose of feedwater flow to the reactor vessel without requiring actuation of any of the Emergency Core Cooling equipment. RCICS is conservatively required to be OPERABLE whenever reactor pressure exceeds 113 pois even though the Residual Meat Removal (RRR) systes provides adequate core.

cooling up to 150 peig. The condensate storage tank provides suf ficient water to reduce the reactor coolant temperature and pressure to permit the RRR systes .co be operated.

BRUNSWICK - UNIT 1 B 3/4 7-1 AhnadmAd0s num=4eem-esa.

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INSERT FOR BASES 3/4.7.1 i

l During the initial stage of a DBA (0 . 10 ainutes), the service ustor syctem i provides lube water and service water cooling to the diesel generators. The '

service water system design allows either unit's nuclear header to supply  ;

diesel generator cooling water. Two pumps are necessary to supply sufficient j L'

flow to cool all four diesel generators under worst case scenarios while also {

supplying flow to other safety and non safety rc3ated components. Therefore, '

any combination of three operable nuclear service water pumps per site will meet the single failure criteria and assure diessi generator cooling. The t requirement for two operable nucienr service water pumps associatad with a unit in OPERATIONAL CONDITIONS 1, 2 or 3 and et least three operable nuclear -;

service water pumps per sit;e when one or both units are in OPERATIONAL CONDITIONS 4 or 5 ensures that ecergency diesel generator cooling requirements are met, i

After the initial ten minutes of a DBA, additional loads require cooling water. These_ loads include RHR and CS pump room coolers, RHR service water heat exchangers, and RHR pump seal heat exchangers. Evaluations have determined that the RHR pumps seals, as well as the equipment in rooms serviced by the V:tR and CS room coolers, remain within the manufacturers'

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temperature limits for the first ten minutes of a DBA. To meet the additional '

loads during the post ten minute stage of a DBA, two service water pumps on the affected unit must be in service. In order to assure single failure criteria is met, the Technical Specificacion requires two operable .

conventional service water pumps per unit while in OPERATIONAL CONDITION 1, 2 or 3. ,

r As discussed above, when in OPERATIONAL CONDITIONS 4 and 5, the reduced core  ;

decay heat load and the accessibility to the reactor building for manual operator action reduce the requirement for operable cervice water pumps after an accident / transient to one. The?* fore, when in OPERATIONAL CONDITIONS 4 or 5, two operable service water pumpe (any combination of nuclear and/or conventional) capable of supplying the nuclear header are required provided that there are at least three op;i:able nuclear service water pumps per site.  ;

Maintaining two operable servlee water pumps (nuclear and/or conventional) on <

the Unit while in OPERATIONAL COND1 tit)NS 4 or 5 assures lon6+ erm cooling can be supplied, even after application of.the single failure criteria.

Stipulating at least three operable nuclear service water pumps per site assures diesel generator cooling will be available following any DBA, regardless of which Unit suffers the accident /trancient.

The allowed out of service times and compensatory measures established in the Action Statements are consistent with or more conservative than those of the existing Technical Specification 3.7.1.2. In particular, Action Statement a.2 for OPERATIONAL CONDITIONS 1, 2, and 3 requires the unit to be in HOT SHUTDOWN

.within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> with no ll operable nuclear service water pumps. Analyses have been performed which demonstrate operation in OPERATIONAL CONDITIONS 1 through 3 with no operable nuclear service water pumps is acceptable provided that at least two nuclear service' water pumps are operable on the opposite unit and two conventional B

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. pumps are operable on the affected unit. Specific Actio'n statements and LCO

. time 11mits for this' situation have not been developed since a more conservative action Statement has been established-in order to minimize the risk of personnel error in administrating this situation.

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1- ENCIDSURE 4 BRUNSWICK STF.AM ELECTRIC PIANT, UNITS 1 ANP 2 j NRC DOCKETS 50 325 6 50 324 -

OPERATING LICENSES DPR.71 & DPR 62  !

i REQUEST FOR LICENSE AMENDNENT F,T SERVICE WATER SYSTEN

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r TECHNICAL SPECIFICATION PACES . UNIT 2 i

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, stRvtCE WATER SYSTEM t

,; _ LIMIT!NC CONDITION POR OPPRA? ION nr.:= x:= ::::= =:=: u; m:1 g ::en: e. e ;

1 et threo, OPERABLE service water pumps.

APPL BILITY: CONDITIONS 1, 2, 3, 4, and 5.

ACTION:

a. In CONDI ON 1, 2, or 3:
1. With ortty two service water pumps OPERABLE, restore least three dq pueps to QPERAB12 status within 7 days or be in at east ROT SMUTDOVN within the 4 ext 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD 3RUTDOWN wit in the following %

hours.

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2. With only one service water pump OPERABLE, store at least two pumss

&-)' to OPERAt!2 statutgvithin 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and te ore at least three pumps to OPERABLE status a$ thin 7 days from t time of the initial loss or

% be in at least HOT SmtTDOWN within the est 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD

, sl, SHUTDOWN within the following 24 hou .

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With only one service water N 4i.InCondition4or5:

1.

Y OPERABLE, restore at least two service water pumps to OPER6812 tatus within 7 days or declare the Core Spray Systee, the LP Systee, and the diesel generatore  ;

inoperable and take the CTION required by Specifications 3.5.3. t ,

$ 3 5 3.2, and 3.8.1.2. N

2. With the service er systes nuclear header inoperable, operation may continue prov ded that the Unit No. I tervice water nuclear

} header is OPE water pumpel E with store the at least three service water OPERAKE Unit No. I service system clear header to h OPERABLE st us within 14 days or declare the di el generators l g inoperabl and take the ACTION required by Specif ation 3.8 1. 2.

N 3. With service unter systes ranclear header inoperab , operatinn h may h

tinue provided that the service water system con ntional r is in operation with at least two service water e

.* Restore the service water system nuclear heade to OPERABLE statue within 14 days or declare the Core Spray Sys e and LPC1 System inoperable and take the ACTION required by Specif t tt: 4 3 5 3.1 and 3 5.3.2.

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UNIT 2  ;

l PLANT SYSTEMS e -

SERVICE WATER SYSTEM LIMITING CONDITION TO) JPERATION  !

UNIT 2 '

3.7.1.2 The service water system shall be OPERABLE with at ,

least:

In OPERATIONAL CONDITIONS 1, 2, and 3 Two OPERABLE nuclear service water pumps, and two OPERABLE conventional service water pumps capable of supplying the nuclear and conventional headers.

In OPERATIONAL CONDITIONS 4 AND 5 Three OPERABL2 site nuclear service water pumps; and two '

OPERABL2 Unit 2 service water pumps, nuclear and/or conventional, powered from separate emergency buses and t capable of supplying the nuclear header.

APPLicABILLIX1 OPERATIONAL CONDITIONS 1, 2, 3, 4, and 5 ACTION!

a. In OPERATIONAL CONDITION 1, 2, or 3:
1. With two OPERABLE conventional service water pumps and only one nuclear service water pump OPERABL2, restore the remaining nuclear service water pump to OPERABLE status within 7 days or be in HOT SNUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and COLD SNUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
2. With no OPERABLE nuclear service water pumps, regardless of conventional service water pump status, be in at least HOT SNUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SNUTDOWN within the.following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
3. With two OPERABLE nuclear service water pumps and only one conventional service water pump OPERABL2, restore at least one additional conventional service water pump to OPERABLE status within 7 days or be in HOT SNUTDOWN within 12 and-COLD shutdown within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

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, 4. With two OPERABLI nucioar 00rvico wator pumps and no j conventional service water pump OPERABLE, restore at least one conventional service water pump to OPERABLI status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and restore the remaining conventional service water pump to CPERABLE status within 7 days from the time of the loss of the first pump.

Otherwise, be in at least HOT SKUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SKUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

5. With only one nuclear service water pump and one conventional service water pump OPERABLE, restore at least one additional service water pump, nuclear or l conventional, to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and '

restore the remaining service water pump to OPERABLE J status within 7 days from the time of the loss of the first pump. Otherwise, be in at least HOT SKUTDOWN ,

- within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SKUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

6. With one OPERABLZ nuclear service water pump and no  :

OPERABLZ conventional service water pumps, be in at  ;

least HOT SKUTDOWN SKUTDOWN within the following within the24 next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in CQLD hours, t

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b. In OPERATIONAL CONDITION 4 or 5: '
1. With one less than the required number of nuclear  :

service water pumps OPERABL2 per site, restore at least -

one additional nuclear service water pump to OPERABLE '

status within 14 days or declare the diesel generators inoperable and take the ACTION required by Specifications 3.8.1.1 or 3.8.1.2 as appropriate. ,

2. With the service water system nuclear header .

inoperable, or no Unit 2 nuclear service water pumps '

! operable, operation may continue provided that the service water system conventional header is OPERABLE '

I with at least two conventional service water pumps OPERABL2. Restore the service water systen nuclear '

header to OPERABL2 status within 14 days or declare the Core Spray System and LPCI System inoperable and take the ACTION required by Specifications 3.5.3.1 and '

3.5.3.2. Also, declare the diesel generators inoperable and take the ACTION required by Specifications 3.8.1.1 or 3.8.1.2 as appropriate. ,

3. With less than two OPERABLE site nuclear service water pumps, declare the diesel generators inoperable and take the ACTION required by Specifications 3.8.1.1 or ,

3.8.1.2 as appropriate.

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4. . With cnly cna Unit 2 sorvico votor purp CPERABLE, .  !

rOctoro ot 1000t ena additional Unit 2 purp, oithor ,

~ ' nucicar or conventional, powered from a separate j emergency bus, to OPERABLE status within 7 days or ,

declare the core Spray System and the LPCI system ,

inophrable and take the ACTION required by '

specifications 3.5.3.1 and 3.5.3.2.

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3/4.7.1 SERVICE WATER SYSTEMS -

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3/4.7.2 CONTROL ROOM EERGENCY FILTRATION SYSTEM The OPERASILITY of the control room ventilation system ensures that 1) the ambient air temperature does not exceed the allowable temperature f or continuous duty rating for the equipment and instrumentation cooled by this system, and 2) the control room will remain habitable for operations personnel during and following all credible accident conditions. The OPERABILITY of l this system in conjunction with control toca design provisions is based on limiting the radiation exposure to personnel occupying the control room to 5 ren or less, whole body, or its equivalent. This limitation is consistent with the requiremente of General Design Criteria 10 of Appendix "A". 10 CFR

i. Part 50.

3/4.7.3 FLOOD PROTECTION

' 6 The limitation on flood protection ensures that facility protective l actions will be taken and operation will be terminated in the event of flood l

conditions. The limit of elevation 17'6" han Sea favel is based on the l nanimas elevation at which facility flood control asseures provide protection to safety-related equipannt.

3/4.7.4 REACTOR CORE ISOLATION COOLING SYSTEM l

the reactor core toelation cooling system (RCICS) is provided to assure I

adequate core cooling in the event of reactor isolation from its primary heat sink and the lose of feedwater ff.mr to the reactor vessel without requiring actuation of any of the Beergency Core Cooling equipannt.' RCICS is conservatively regelved to be OPERASIA whenever reactor pressure exceeds 113

! pois evas- the b idual Esat Removal (RER) systes provides adequate core I

cooling W hets. The condeneste storage tank provides aufficient water to red seenter coolant temperature and pressure to permit the RMR system ear,, ed.

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INSERT FOR BASES 3/4.7.1 1

During the initial stage of a DBA (0 - 10 minutes), the service water system provides lube water and service water cooling to the diesel generators. The service water system design allows either unit's nuclear header to supply diesel generator cooling water. Two pumps are necessary to supply sufficient l flow to cool all four diesel Senerators under worst case scenarios while also ,

supplying flow to other safety and non safety related components. Therefore. ,

any combination of three operable nuclear service water pumps per site will '

meet the single failure criteria and assure diesel generator cooling. The requirement for two operable nuclear service water pumps associated with a unit in OPERATIONAL CONDITIONS 1, 2, or 3 and at least three operable nuclear service water pumps per site when one or both units are in OPERATIONAL CONDITIONS 4 or 5 ensures that emergency diesel generator cooling requirements are met.

After the initial ten minutes of a DBA, additional loads require cooling water. These loads include RHR and CS pump room coolers, RHR service water ,

heat exchangers, and RHR pump seal heat exchangers. Evaluations have determined that the RHR pumps seals, as well as the equipment in rooms l serviced by the RHR and CS room coolers, remain within the manufacturers' temperature limits for the first ten minutes of a DBA. To meet the additional loeds during the post-ten minute stage of a DBA, two service water pumps on the affected unit must be in service. In order to assure single failure criteria is met, the Technical Specification requires two operable conventional service water pumps per unit while in OPERATIONAL CONDITION 1, 2, or 3.

As discussed above, when in OPERATIONAL CONDITIONS 4 and 5, the reduced core decay heat load and the accessibility to the reactor building for manual operator action reduce the requirement for operable service water pumps after an accident / transient to one. Therefore, when in OPERATIONAL CONDITIONS 4 or 5, two operable service water pumps (any combination of nuclear and/or conventional) capable of supplying the nuclear header are required provided that there are at least three cperable nuclear service water pumps per site.

Maintaining two operable service water pumps (nuclear and/or conventional) on the Unit while in OPERATIONAL CONDITIONS 4 or 5 assures long-term cooling can be supplied, even after application of the single failure criteria.

Stipulating at least three operable nuclear service water pumps per site assures diesel generator cooling will be available following any DBA, regardless of which Unit suffers the accident / transient.

The allowed out of service times and compensatory measures established in the ActJan Statements are consistent with or more conservative than those of the ,

exiscing Technical Specification 3.7.1.2. In particular, Action Statement a.2 for_0PERATIONAL CONDITIONS 1, 2, and 3 requires the unit to be in HOT SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> with no operable nuclear service water pumps. Analyses have been performed which demonstrate operation in OPERATIONAL CONDITIONS 1 through 3 with no operable nuclear service water pumps is acceptable provided that at least two nuclear service water pumps are operable ou the opposite unit and two conventional

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conservative Action Statement has been established in order- to minimize the j risk of personnel error in administrating this situation.

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