Text

Proposed Tech Specs 3/4.6.2.1 & 3/4.6.2.3,adapting Combined Spec for Containment Spray & Cooling Sys Contained in Std TS for C-E Plants
	ML17228A903
Person / Time
Site:	Saint Lucie
Issue date:	11/02/1994
From:	; FLORIDA POWER & LIGHT CO.
To:	;
Shared Package
ML17228A902	List: ML17228A901; ML17228A903;
References
	NUDOCS 9411080182
	Download: ML17228A903 (38)
	v • d • e

St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems ATTACHMENT 3 ST. LUCIE UNIT 1 MARKED-UP TECHNICAL SPECIFICATION PAGES Page VI Page 3/4 6-15 Insert A Page 3/4 6-16 Insert B Page 3/4 6-17 Page B 3/4 6-2 Insert C Page B 3/4 6-3 9411080182 '741102 PDR 'ADOCK 05000335 PDR

INOEX LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE RE UIREMENTS SECTION PAGE 3/4. 6 CONTAINMENT SYSTEMS 3/4.6.1 CONTAINMENT VESSEL. ~ ~ -.. ....

~ ~ ~ ~ . ~ ~ ~ ~ ~ ~ . ~ ~ ~ ~ ~ ~ ~ - ~ ~ - ~ ~ 3/4 6-1 Containment Vessel Integrity............. 3/4 6-1 Containment Leakage...................... 3/4 6-2 Containment Air Locks.....;........., ................ 3/4 6-10 Internal Pressure.................................... 3/4 6-12 A ir Temperature...................-.. " .. 3/4 6-13 Containment Vessel Structural Integrity.. 3/4 6-14 3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS..... 3/4 6-15 Containment Spray Syetedg .............. 3/4 6-15 pray Additive System. 3/4 6-16a

$6 atHame 3/4.6.3 CONTAINMENT ISOLATION VALVES...... -................ -- 3/4 6-18 3/4.6.4 COMBUSTIBLE GAS CONTROL..........................---. 3/4 6-23 Hydrogen Analyzers................... """" . " .... 3/4 6-23 Electric Hydrogen Recombiners - W ....... 3/4 6-24 3/4.6. 5 VACUUM RELIEF VALVES..........-...... -... 3/4 6-26 3/4.6. 6 SECONDARY CONTAINMENT.......... -....... -........ '. 3/4 6-27 Shield Building Ventilation System....... 3/4 6-27 Shield Building Integrity................ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3/4 6-30

~hield Building Structural Integrity..';.. 3/4 6-31 3/4.7 PLANT SYSTEMS 3/4.7.1. TURBINE CYCLE ......................;........... 3/4 7-1

..S afety Valves................................... 3/4 7-1 Auxiliary Feedwater System................--.. " 3/4 7-4 Condensate Storage Tank......... 3/4 A ctivity......................... 3/4 ?-?

Hain Steam Line Isolation Valves. 3/4 7-9 Secondary Water Chemistry....................... 3/4 7-10 ST. LUCIE - UNIT 1 VI Amendment No. ~~

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CONTAINMENT SYSTEMS 3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS CONTAINMENT SPRAY SYSTEM 1nsart ~g CooliHc LIMITING CONDITION FOR OPERATION

3. 2. 1 Two independent containment spray systems shall be OPERABLE with h spray system capable of taking suction from the RWT on Containme Spray Actuation Signal and automatically transferr g suction to t containment sump on a Recirculation Actuati Signal.

Each spray syste low path from the containment sump s 1 be via an OPERABLE shutdown co ing heat exchanger.

APPLICABILITY: MODES 1, 2 d 3*.

P,EFLUX ACTION:

+HI SsNT- a. With on ntainment ray syst inoperable and all four co nment fan c ers OPERABLE, tore the inoperable pray system PERABLE status within days or be in HOT SHUTDO within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

b. Wit one containment spray system inoperable and containment n cooler inoperable, restore either the inoperable ray system or the inoperable fan cooler to OPERABLE status w in 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in HOT SHUTDOWN within the next 12 hours.

SURVEILLANCE RE UIREMENTS C

4.6.2.1 Each containment spray system shall be demonstrated OPERABLE:

a. At least once per 31 days by verifying that each valve (manual, power operated or automatic) in the flow path that is not locked, sealed, or otherwise secured in position, is positioned to take suction from the RWT on a Containment Pressure I s

-- High High test signal.

b. By verifying that on recirculation flow, each spray pump develops a discharge pressure of > 200 psig, when tested pursuant to Specification 4'9.5.

ST. LUCIE - UNIT 1 3/4 6-15 .%acndment No. pg

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St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems INSERT A 3.6.2.1 Two containment spray trains and two containment cooling trains shall be OPERABLE.

APPLICABILITY: Containment Spray System: MODES 1, 2, and MODE 3 with Pressurizer Pressure 2 1750 psia.

Containment Cooling System: MODES 1,2, and 3.

ACTION%

Modes 1 2 and 3 with Pressurizer Pressure a 1750 sia:

a. With one containment spray train inoperable, restore the inoperable spray train to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months and within 10 days from initial discovery of failure to meet the LCO; otherwise be in MODE 3 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in MODE 4 within the following 54 hours6.25e-4 days 0.015 hours 8.928571e-5 weeks 2.0547e-5 months .

b. With one containment cooling train inoperable, restore the inoperable cooling train to OPERABLE status within 7 days and within 10 days from initial discovery of failure to meet the LCO( otherwise be in MODE 3 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in MODE 4 within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

c. With one containment spray train and one containment cooling train inoperable, concurrently implement ACTIONS a. and b. The completion intervals for ACTION a. and ACTION b. shall be tracked separately for each train starting from the time each train was discovered inoperable.

d. With two containment cooling trains inoperable, restore one cooling train to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ; otherwise be in MODE 3 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in MODE 4 within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

e. With two containment spray trains inoperable or any combination of three or more trains inoperable, enter LCO 3.0.3 immediately.

2. Mode 3 with Pressurizer Pressure ( 1750 sia:

a. With one containment cooling train inoperable, restore the inoperable cooling train to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ; otherwise be in MODE 4 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

b. With two containment cooling trains inoperable, enter LCO 3.0.3 immediately.

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c. At least once, per 18 months, during shutdown, by:

1. Verifying that each automatic valve in the flow path actuates to its correct position on a CSAS test signal.

2. Verifying that each spray pump starts automatically on a CSAS test signal.

3. Verifying that upon a recirculation actuation signal, the containment sump isolation valves open and that a recirculation mode flow path via an OPERABLE shutdown cooling heat exchanger is established.

d. At least once per 10 years by performing an air or smoke flow test through each spray header and verifying each spray nozzle is unobstructed.

ST. LUCIE UNIT 1 3/4 6-16 Amendment No. ,

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St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems INSERT B 4.6.2.1.1 Each containment cooling train shall be demonstrated OPERABLE:

a0 At least once per 31 days by:

1. Starting each cooling train fan unit from the control room and verifying that each unit operates for at least 15 minutes, and

2. Verifying a cooling water flow rate of greater than or equal to 1200 gpm to each cooling unit.

b. At least once per 18 months, during shutdown, by verifying that each containment cooling train starts automatically on an SIAS test signal.

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NTAINMENT SYSTEMS CON NMENT COOLING SYSTEM LIMITING NDITION FOR OPERATION

.6.2.3 Four c tainment fan coolers shall be OPERABLE.

PPLICABILITY: MO S 1, 2 and 3.

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a. With one contai ent fan cooler inoperable nd both containment spray systems OP BLE, restore the inop able fan cooler to OPERABLE status wi in 30 days or be in OT SHUTDOWN within the next 12 hours.

b. With one containment fan cooler i perable and one containment spray system inoperable, restore either the inoperable fan cooler or the inoperable sp y ystem to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in HOT UTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

SURVEILLANCE RE UIREMENTS 4.6.2.3 Each contai ent fan cool r shall be demonstrate OPERABLE at least once per 31 d s on a STAGGERED TEST BASIS by:

a. Start g each unit rom the control room,

b. Ve fying that ach unit operates for at least 15 minut , and

c. erifying g cooling water flow rate of > 1200 gpm to each .

cooling hit.

ST. LUCIE UNIT 1 3/4 6-17 Amendment No.

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CONTAINMENT SYSTEMS 0 BASES 3/4.6.1.4 INTERNAL PRESSURE The limitations on containment internal pressure ensure'that

1) the containment structural is prevented from exceeding its design negative pressure differential with respect to the annulus atmosphere of 0.70 psi and 2) the containment peak pressure does not exceed the design pressure of 44 psig during steam line break accident conditions.

The maximum peak pressure obtained from a steam line break accident is 41.6 psig. The limit of 2.4 psig for initial positive containment pressure will limit the total pressure to 44.0 psig which is the design pressure and is consistent with the accident analyses.'/4.6.1.5 AIR TEMPERATURE The limitation on containment air temperature ensures that the containment vessel temperature does not exceed the design temperature of 264'F during LOCA conditions. The containment temperature limit is consis ent with the accident analyses.

3/4.6.1.6 CONTAINMENT VESSEL STRUCTURAL INTEGRITY This limitation ensures that the structural integrity of the con-tainment steel vessel will be maintained comparable to the original design standards for the life of the facility. Structural integrity is required to ensure that the vessel will withstand the maximum pressure of 41.6 psig in the event of a steam line break accident. A v'isual inspection in conjunction with Type A leakage test is sufficient to demonstrate this capability.

3/4.6.2 DEPRESSURIZATION ANO COOLING SYSTEMS 3/4.6.2.1 CONTAINMENT SPRAY YSTE

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St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems INSERT C PSL1 The OPERABILITY of the containment spray and cooling systems ensures that depressurization and cooling capability will be available to limit post-accident pressure and temperature in the containment to acceptable values. During a Design Basis Accident (DBA), at least two containment cooling trains or two containment spray trains, or one of each, is capable of maintaining the peak pressure and temperature within design limits. One containment spray train has the capabilityg in con)unction with the Spray Additive System, to remove iodine from the containment atmosphere and maintain concentrations below those assumed in the safety analyses. To ensure that these conditions can be met considering single-failure criteria, two spray trains and two cooling trains must be OPERABLE.

The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months action interval specified in ACTION 1.a and ACTION 1.d, and the 7 day action interval specified in ACTION l.b take into account the redundant heat removal capability and the iodine removal capability of the remaining operable systems, and the low probability of a DBA occurring during this period. The 10 day constraint for ACTIONS l.a and 1.b is based on coincident entry into two ACTION conditions (specified in ACTION 1.c) coupled with the low probability of an accident occurring during this time. If the system(s) cannot be restored to OPERABLE status within the specified completion time, alternate actions are designed to bring the unit to a mode for which the LCO does not apply. The extended interval (54 hours6.25e-4 days 0.015 hours 8.928571e-5 weeks 2.0547e-5 months ) specified in ACTION l.a to be in MODE 4 includes 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months of additional time for restoration of the inoperable CS train, and takes into consideration the reduced driving force for a release of radioactive material from the RCS when in MODE 3. With two containment spray trains or any combination of three or more containment spray and containment cooling trains inoperable in MODES 1,2, or Mode 3 with Pressurizer Pressure a 1750 psia, the unit is in a condition outside the accident analyses and LCO 3.0.3 must be entered immediately. In MODE 3 with Pressurizer Pressure ( 1750 psia, containment spray is not required.

The specifications and bases for LCO 3.6.2.1 are consistent with NUREG-1432, Revision 0 (9/28/92), Specification 3.6.6A (Containment Spray and Cooling Systems; Credit taken for iodine removal by the Containment Spray System), and the plant safety analyses.

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CONTAINMENT SYSTEMS BASES 3 4,6.2.2 SPRAY AODITIVE SYSTEM The OPERABILITY of the spray additive system ensures that suffi-cient NaOH is added to the containment spray in the event of a LOCA.

The limits on NaOH volume and concentration ensure a pH value of between 8.5 and 11.0 for the solution recirculated within containment after a LOCA. This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components. The contained water volume limit includes an allowance for water not usable because of tank discharge line location or other physical characteristics. These assumptions are consistent with the iodine removal efficiency assumed in the accident analyses.

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The OPERABILITY of nt cooling system ensures that 1) the containment air perature wi intained within limits during normal operat' and 2) adequate heat remova city is available when op ed in conjunction with the containment spra ems during po CA conditions.

3/4.6.3 CONTAINMENT ISOLATION VALVES The OPERABILITY of the containment isolation valves ensures that the containment atmosphere will be isolated from the outside environment in the event of a release of radioactive material to the containment atmos-phere or pressurization of the containment. Containment isolation within the time limits specified ensures that the release of radioactive material to the environment will be consistent with the assumptions used in the analyses for a LOCA. This includes the containment purge inlet and outlet valves.

~ j 3 4.6. 4 COMBUSTIBLE GAS CONTROL The OPERABILITY of the equipment and systems required for the detection and control of hydrogen gas ensures that this equipment will be available to maintain the hydrogen concentration within containment below its flamnable limit during post-LOCA conditions. Either recombiner unit is capable of controlling the expected hydrogen generation associated with 1) zirconium-water reactions, 2) radiolytic decomposition of water and 3) corrosion of metals within containment.

The containment fan coolers are used in a secondary function to ensure adequate mixing of the containment atmosphere following. a LOCA.

This mixing action will prevent localized accumulations of hydrogen from exceeding the flammable limit.

ST. LUCIE - UNIT 1 B 3/4 6-3 Amendment No. 29, <<W

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St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems ATTACHMENT 4 ST ~ LUCIE UNIT 2 MARKED-UP TECHNICAL SPECIFICATION PAGES Page VII Page 3/4 6-15 Page Insert A Page 3/4 6-16 Insert B Page 3/4 6-18 Page B 3/4 6-2 Insert C Page B 3/4 6-3

INDEX LIMITING CONDITIONS FOR OPERATION AND SURVEILLANCE RE UIREMENTS SECTION PAGE 3/4.6 CONTAINMENT SYSTEMS 3/4. 6. 1 PRIMARY CONTAINMENT CONTAINMENT INTEGRITY.......... 3/4 6-1 CONTAINMENT LEAKAGE.................................. 3/4 6"2 CONTAINMENT AIR LOCKS................. 3/4 6-9 INTERNAL PRESSURE............. 3/4 6-11 AIR TEMPERATURE............... 3/4 6-12 CONTAINMENT VESSEL STRUCTURAL INTEGRITY. 3/4 6-13 CONTAINMENT VENTILATION SYSTEM..... 3/4 6-14 3/4. 6. 2 DEPRESSURIZATION AND COOLING SYSTEMS CONTAINMENT SPRAY SYSTE 3/4 6 15 a< GSLltl4 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

IODINE REMOVAL SYSTEM..... ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3/4 6 17 3/4. 6. 3 CONTAINMENT ISOLATION VALVES........... 3/4 6-19 3/4. 6.4 COMBUSTIBLE GAS CONTROL HYDROGEN ANALYZERS.... 3/4 6.-24 ELECTRIC HYDROGEN RECOMBINERS " M. ................ 3/4 6-25 3/4.6.5 VACUUM RELIEF VALVES........... ....................... 3/4 6-26 3/4.6.6 SECONDARY CONTAINMENT SHIELD BUILDING VENTILATION SYSTEM................... 3/4 6-27 SHIELD BUILDING INTEGRITY.........................- 3/4 6 3O SHIELD BUILDING STRUCTURAL INTEGRITY................. 3/4 6 31 ST. LUCIE - UNIT 2 VII

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CONTAINMENT SYSTEMS 3/4. 6. 2 DEPRESSURIZATION AND COOLING SYSTEMS CONTAINMENT SPRAY SYSTEM ~

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3. . 1 Two independent containment spray systems shal e OPERABLE wi each spray sy capable of taking suction from the RWT~h a Contain pray Actuation Sig and automatically transfer ring uction to t ontainment sump on a Sump Rec lation Actuation Signal Each sp~r system flow path from the containment s hall be via an 0 RABLE hKtdown cooling heat exchanger.

APPLICABILITY: MOOFS 1, 2, and 3".

ACTION:

With one contai system to BLE t spray system inoperable, restor e the status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HO

'rabl e spr ay NOSY within the n - 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months ; restore the inoperable spray system to OPERABLE st in the next 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months or be in COLD SHUTDOWN within the following 30 h SURVEILLANCE RE UIREMENTS 4.6.2.1 Each containment spray system shall be demonstrated OPERABLE:

At least once per 31 days by verifying that each valve (manual, power operated, or automatic) in the flow path that is not locked, sealed, or. otherwise secured in position, is positioned to take suction from the RWT on a Containment Pressure High-High test signal.

b. By verifying, that on recirculation flow, each pump develops a discharge pressure of greater than or equal to 200 psig when tested pursuant to Specification 4.0.5.

C. At least once per 18 months, during shutdown, by:

l. Verifjj ing that each automatic valve in the flow path actuates to its correct position on a CSAS test signal.

2. Verifying that upon a Recirculation Actuation Test Signal (RAS),

the containment sump isolation valves open and that a recircula-tion mode flow path via an OPERABLE shutdown cooling heat exchanger is established.

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St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems INSERT A 3.6.2.1 Two containment spray trains and two containment cooling trains shall be OPERABLE.

APPLICABILITY: Containment Spray System: MODES 1, 2, and MODE 3 with Pressurizer Pressure a 1750 psia.

Containment Cooling System: MODES 1,2, and 3.

ACTION:

Modes 1 2 and 3 with Pressurizer Pressure h 1750 sia:

a. With one containment spray train inoperable, restore the inoperable spray train to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months and within 10 days from initial discovery of failure to meet the LCO; otherwise be in MODE 3 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in MODE 4 within the following 54 hours6.25e-4 days 0.015 hours 8.928571e-5 weeks 2.0547e-5 months .

b. With one containment cooling train inoperable, restore the inoperable cooling train to OPERABLE status within 7 days and within 10 days from initial discovery of failure to meet the LCO; otherwise be in MODE 3 within the next 6 hours and in MODE 4 within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

c. With one containment spray train and one containment cooling train inoperable, concurrently implement ACTIONS a. and b. The completion intervals for ACTION a. and ACTION b. shall be tracked separately for each train starting from the time each train was discovered inoperable.

d. With two containment cooling trains inoperable, restore one cooling train to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ; otherwise be in MODE 3 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in MODE 4 within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

e. With two containment spray trains inoperable or any combination of three or more trains inoperable, enter LCO 3.0.3 immediately.

2. Mode 3 with Pressurizer Pressure < 1750 sia:

a. With one containment cooling train inoperable, restore the inoperable cooling train to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months ; otherwise be in MODE 4 within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

b. With two containment cooling trains inoperable, enter LCO 3.0.3 immediately

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CONTA NMENT SYS HS SURV IL ANC R U R H NTS ontinued

3. Verifying that each spray pump starts automatically on a CSAS test signal.

d. At least once per 10 years by performing an air or smoke flow test through each spray header and verifying each spray nozzle is unobstructed.

ST. LUCIE - UNIT 2 3/4 6-16 Amendment No.

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St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems INSERT B 4.6.2.1.1 Each containment cooling train shall be demonstrated OPERABLE:

a0 At least once per 31 days by:

1. Starting each .cooling train fan unit from the control room and verifying that each unit operates for at least 15 minutes, and

2. Verifying a cooling water flow rate of greater than or equal to 1200 gpm to each cooling unit.

b. At least once per 18 months, during shutdown, by verifying that each containment cooling train starts automatically on an SIAS test signal.

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QNTAINMENT SYSTEMS CONT MENT COOLING SYSTEM LIMITING CO DITION FOR OPERATION 3.6.2.3 Four indep dent containment fan coolers shall be ERABLE.

APPLICABILITY: MODES 1, 2, and 3.

ACTION:

With one of the above required ntainment fan oolers inoperable, restore the inoper able containment fan cooler o OPERAB status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 ho s; restore the inoperable contain-ment fan cooler to OPERABLE status wit the next 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months or be in COLD SHUTDOWN within the following 30 hour3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months SURVEILLANCE RE UIREMENTS 4.6.2.3 Each containmen fan cooler shall be demonstr ted OPERABLE:

a0 At least ce per 31 day by:

arting each fyn cooler from the control room d verifying that each fan cooler operates for at least 15 min es.

Verifying cooling water flow rate of greater than or qual to 1200 gp to each fan cooler.

b. At least once per 18 months by verifying that each fan cooler sta s automatically on an SIAS test signal; ST. LUCIE - UNIT 2 . 3/4 6-18

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CONTAINMENT SYSTEMS BASES 3/4.6. 1.5 AIR TEMPERATURE The limitation on containment average air temperature ensures that the containment temperature does not exceed the design temperature of 264 F during steam line break conditions and is consistent with the safety analyses.

3/ .6. 1.6 CONTAINMENT VESSEL STRUCTURAL INTEGRITY This limitation ensures that the structural integrity of the containment steel vessel will be maintained comparable to the original design standards for the life of the facility. Structural integrity is required to ensure that the vessel will withstand the maximum pressure of 44.0 psig in the event of a steam line break accident. A visual inspection in conjunction with Type A leakage test's sufficient to demonstrate this capability.

3/4. 6. 1. 7 CONTAINMENT VENTILATION SYSTEM The 48-inch containment purge supply and exhaust isolation valves are required to be closed during plant operation since these valves have not been demonstrated capable of closing during a LOCA or steam line break accident.

Maintaining these valves closed during plant operations ensures that excessive quantities of radioactive materials will not be released via the containment purge system. To provide assurance that the 48-inch valves cannot be inadvertently opened, they are sealed closed in accordance with Standard Review Plan 6.2.4 which includes devices to lock the valve closed, or prevent power from being supplied to the valve operator.

The use of the containment purge lines is restricted to the 8-inch purge supply and exhaust isolation valves since, unlike the 48-inch'alves, the 8-inch valves will close during a LOCA or steam line break accident and therefore the site boundary dose guidelines of 10 CFR Part 100 would not be exceeded in the event of an accident during purging operations.

Leakage integrity tests with a maximum allowable leakage rate for purge supply and exhaust isolation valves will provide early indication of resilient material seal degradation and will allow the opportunity for repair before gross leakage failure develops'he 0.60 L leakage limit shall not be exceeded when the leakage rates determined 3y the leakage integrity tests of these valves are added to the previously determined total for all valves and penetrations subject to Type B and C tests.

3/4. 6. 2 DEPRESSURIZATION AND COOLING SYSTEMS 3/4.6.2.

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St. Lucie Unit 1 and Unit 2 Docket Nos. 50-335 and 50-389 Proposed License Amendments Containment S ra and Coolin S stems INSERT C PSL2 The OPERABILITY of the containment spray and cooling systems ensures that depressurization and cooling capability will be available to limit post-accident pressure and temperature in the containment to acceptable values. During a Design Basis Accident (DBA), at least two containment cooling trains or two containment spray trains, or one of each, is capable of maintaining the peak pressure and temperature within design limits. One containment spray train has the capabilltyg in conjunction with the Zodine Removal System, to remove iodine from the containment atmosphere and maintain concentrations below those assumed in the safety analyses. To ensure that these conditions can be met considering single-failure criteria, two spray trains and two cooling trains must be OPERABLE.

The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months action interval specified in ACTION l.a and ACTION l.d, and the 7 day action interval specified in ACTION 1.b take into account the redundant heat removal capability and the iodine removal capability of the remaining operable systems, and the low probability of a DBA occurring during this period. The 10 day constraint for ACTIONS l.a and 1.b is based on coincident entry into two ACTION conditions (specified in ACTION 1.c) coupled with the low probability of an accident occurring during this time. If the system(s) cannot be restored to OPERABLE status within the specified completion time, alternate actions are designed to bring the unit to a mode for which the LCO does not apply. The extended interval (54 hours6.25e-4 days 0.015 hours 8.928571e-5 weeks 2.0547e-5 months ) specified in ACTION l.a to be in MODE 4 includes 48 hours5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months of additional time for restoration of the inoperable CS train, and takes into consideration the reduced driving force for a release of radioactive material from the RCS when in MODE 3. With two containment spray trains or any combination of three or more containment spray and containment cooling trains inoperable in MODES 1,2, or Mode 3 with Pressurizer Pressure a 1750 psia, the unit is in a condition outside the accident analyses and LCO 3.0.3 must be entered immediately. In MODE 3 with Pressurizer Pressure < 1750 psia, containment spray is not required.

The specifications and bases for LCO 3.6.2.1 are consistent with NUREG-1432, Revision 0 (9/28/92), Specification 3.6.6A (Containment Spray and Cooling Systems; Credit taken for iodine removal by the Containment Spray System), and the plant safety analyses.

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CONTAIWENT SYSTem BASES gag C.00L CONTAINMENT SPRAY,SYST ~ Continued ll44'ment Spray System and the Containment Cooling Syst e post-accident coo Spray System also provides a me atmosphere and therefore the

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e containment atmosphere.

for remen wev , he Containment ovf g iodine from the containment estoring an inoperable spray system to B s atus have been maintained con te with that ass er inoperable ESf equipment.

3/4.6.2. 2 IOOINE REMOYAL SYSTBI The OPERABILITY of the Iodine Removal System ensures that sufffcfent N>H~

is added to the containment spray fn the event of a LOCA. The lfmfts on N2H~

volume and concentration ensure a minimum of 50 ppm of N>H~ concentration available fn the spray for a mfnimum of 6.5 hours5.787037e-5 days 0.00139 hours 8.267196e-6 weeks 1.9025e-6 months per pump for a total of 13 hours1.50463e-4 days 0.00361 hours 2.149471e-5 weeks 4.9465e-6 months to provide assumed iodine decontamination factors on thi contafnment.

atmosphere during spray function and ensure a pH value of between 7.0 and B.Q-for the solution recirculated within containment after a LOCA. This pH band minimizes the evolutfon of iodfne and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components. The contained water volume limit includes an allowance for water not usable because of tank discharge line locatfon or other physical characterfstfcs. These assumptions are consistent with the iodine removal efficiency assumed in the safety analyses.

3/4. 6. 2. 3 tR+EHHEN~OOt&

ERNE. ~~ DE l.i'Mp he OPERABILITY of the Containment Cooling System ensures that (1) contain air temperature will be maintained withfn limits durin rmal operation, an ) adequate heat removal capacity fs availab en operated in conjunction wft e Containment Spray Systems durfn st-LOCA conditions.

The Containment Coolfng yam and the afnment Spray System provide post-accident cooling of the cont~a m sphere. As a result of this cooling capability, the allowable~u -o m vice time requirements for the Containment Cooling System h~~een appropr adjusted. The allowable out-of-service time re cerements for the Containmen ray System and Contain ment Cooling Syst ve been maintained consistent wit t assigned other inoperable E quipment since the Containment Spray System a ontainment Coolin tern also provide a mechanism for removing iodine from t co nment atmosphere.

ST. LUCIE - UNIT 2 S 3/4 6-3 Amendment No.

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