ML20046C577

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Proposed Tech Spec 3/4.6.2 Re Depressurization & Cooling Sys Containment Spray Sys
ML20046C577
Person / Time
Site: Waterford Entergy icon.png
Issue date: 08/05/1993
From:
ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20046C575 List:
References
NUDOCS 9308110175
Download: ML20046C577 (7)
v • d • e


Text

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9 CONTAINMENT SYSTEMS 3/4.6.2 OEPRESSURIZATION AND'C00 LING SYSTEMS CCNTAINMENT SPRAY SYSTEM '

LIMITING CCNDITION FOR OPERATION 3.6.2.1 Two independent containment spray systems shall be OPERABLE with each spray system capable of taking suction from the RWSP on a containment spray ,

actuation signal and automatically transferring suction to the safety injection system sump on a recirculation actuation signal. Each spray system flow path  ;

from the safety injection system sump shall be via an OPERABLE shutdown cooling neat excnanger.

APPLICABILITY: MODES 1, 2, 3, anc 4*

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ACTICN:

k' With one containment spray system inoperable, restore the inoperable spray system 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 De 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 />; restore the inoperable spray system to OPERABLE status within the next 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be 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 RE0VIREMENTS t

4.6.2.1 Eacn containment spray system shall be demonstrated CPERABLE:

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a. 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 that the-water level in the t containment spray heacer riser is > 149.5 feet MSL elevation.

b.

At least once per 31 days by verifying that eacn valve (manual, power-operated, or automatic) in the flow path that is not locked, sealed, or otherwise secured in position, is correctly positioned to take suction from the RWSP. +

c.

By verifying, that on recirculation flow, each pumo develops a total head of greater than or equal to 219 psid wnen tested pursuant l to Specification 4.0.5.

d. At least once per 18 months, during shutdown, by:
1. Verifyir.g that each automatic valve in the flow path i actuates to its correct position on a CSAS test signal.

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CONTAINMENT SYSTEMS SURVEILLANCE REOUIREMENTS (Continuec) 2.

Verifying that upon a recirculation actuation test signal, the safety injection system sumo isolation valves open and that a recirculation heat exchangermoce flow path via an OPERABLE snutdown cooling is established.

3.

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

e.

At least oqce per 5 years by performing an air or smoke flow test through each spray heaoer and verifying each spray nozzle is unobstructed, e

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4 CONTAINMENT SYSTEMS BASE 5 3/4.6.2.7 CONTAINMENT VENTILATION SYSTEM (Continued) '

i supplyLeakage integrity tests with a maximum allowable leakage rate for purge and exnaust isolation valves will provide early indication of resilient material seal degradation and will allow the opportunity for repair before.

gross leakage failure develops. The 0.60 L leakage limit shall not be  :

exceeced wnen the leakage rates determined $y the leakage integrity tests of these valves are andec to the previously determined total for all valves anc penetrations subject to Type 8 and C tests.

3/4 6.2 DEPRESSURIZATION AND COOLING SYSTEMS i

i 3/4.6.2.1 and 3/4.6.2.2 CONTAINMENT SPRAY SYSTEM and CONTAINMEN The OPERABILITY of the Containment Spray System and the Containment

Cooling System ensures that containment depressurization and cooling capability '

will de available in the event of a LOCA or MSLB for any double ended break of

' the largest reactor coolant pipe or main steam line. Under post accident concitions these systems will maintain the containment pressure below 44 psig i anc temperatures below 269.3*F during LOCA conditions or 413.5'F during MSLB concitions.

i The systems also reduce the containment pressure by a factor of 2 from its post accident peak within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, resulting in lower containment -

leakage rates and lower- offsite cose rates.

The Containment Spray System also provides a mechanism for removing f iocine from the containment atmospnere under post-LOCA conditions to maintain  ;

coses in accorcance with 10 CFR Part 100 limits as described in Section 6.5.2 of the FSAR.

f When shutdown cooling is placed in operation, the Containment Spray System is no longer required OPERABLE in order to allow realignment and isola- ,

tion of the spray headers. This is necessary to avoid a single failure of the- ,

spray heaoer isolation valve causing Reactor Coolant System depressurization and inadvertent spraying of the containment. At the reduced RCS pressure and ,

temperature associated with entry into shutdown cooling, the probability and associated heat loads of a LOCA ^ ASLB are greatly reduced. The OPERABILITY of the Containment Cooling Systet i MODE 4 is sufficient to provide depres-surization and cooling capability.  :

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CONTAINMENT SYSTEMS 3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS CONTAINMENT SPRAY SYSTEM LIMITING CONDITION FOR OPERATION  ;

3.6.2.1 Two independent containment spray systems shall be OPERABLE with each spray system capable of taking suction from the RWSP on a containment spray actuation signal and automatically transferring suction to the safety injection ,

system sump on a recirculation actuation signal. Each spray system flow path from the safety injection system sump shall be via an OPERABLE shutdown cooling heat exchanger.

APPLICABILITY: MODES 1. 2. 3. and 4*

ACTION:

1 With one containment spray syst.ein inoperable, restore the inoperable spray system 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 be in at least HOT STANDBY within the next 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />s: restore the inoperable spray system to OPERABLE status within the next 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be 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 REQUIREMENTS 4.6.2.1 Each containment spray system shall be demonstrated OPERABLE: .

a. 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 that the water level in the '

Containment spray header riser is > 149.5 feet MSL elevation.

b. At least once per 31 days by verifying that each valve (manual, power-operated. or automatic) in the flow path that is not locked. j sealed or otherwise secured in position. is correctly positioned to  !

take suction from the RWSP, l 1

i

[ c. By verifying. that on recirculation flow, each pump develops a total  !

head of greater than or equal to 219 psid when tested pursuant to  ;

Specification 4.0.5. l

d. 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. I

WATERFORD - UNIT 3 3/4 6-16 1

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. -r CDNTAINMENT SYSTEMS  :

SURVEILLANCE REQUIREMENTS (Continued)

2. Verifying that upon a recirculation actuation test signal,  !

the safety injection system sump isolation valves open and .i that a ' recirculation mode - flow. path _ via an OPERABLE -!

shutdown cooling heat exchanger is established.

3. Verifying that each spray pump starts automatically on a CSAS test signal. l l
e. At least once per 10 years by performing'an air or smoke flow  ;

test through each spray header and verifying each spray nozzle is j unobstructed.  ;

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l WATERFORD - UNIT 3 3/4 6-17

4 CONTAINMENT SYSTEMS ,

, BASES 3/4.6.1.7 CONTAINMENT VENTILATION SYSTEM (Continued)

Leakage integrity tests with a maximum allowable leakage rate for purge supply l and exhaust isolation valves will provide early indication of resilient material j seal degradation and will allow the opportunity for repair before gross leakage l failure develops. The 0.60 La leakage limit shall not be exceeded when the leakage j rates determined by 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 l tests.  ;

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3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS .

3/4.6.2.1 and 3/4.6.2.2 CONTAINMENT STRAY SYSTEM and CONTAINMENT COOLING SYSTEM  ;

l The OPERABILITY of the Containment Spray System and the Containment Cooling i System ensures that containment depressurization and cooling capability will be available in the event of a LOCA or MSLB for any double-ended break of the largest  !

reactor coolant pipe or main steam line. Under post-accident conditions these j systems will maintain the containment pressure below 44 psig and temperatures below l 269.3 F during LOCA conditions or 413.5 F during MSLB conditions. The systems also  ;

reduce the containment pressure by a factor of 2 from its post-accident peak within  !

24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, resulting in lower containment leakage rates and lower offsite dose rates. l The Containment Spray System also provides a mechanism for removing iodine l from the containment atmosphere under post-LOCA conditions to maintain doses in  ;

accordance with 10 CFR Part 100 limits as described in Section 6.5.2 of the FSAR, In MODE 4 when shutdown cooling is placed in operation. the Containment Spray l 51 stem is realigned in order to allow isolation of the spray headers. This is i necessary to avoid a single failure of the spray header isolation valve causing  !

Reactor Coolant System depressurization and inadvertent spraying of the containment. i To allow for this realignment, the Containment Spray System may be taken out-of-service when RCS pressure is g 400 psia. At this reduced RCS- pressure and the l' reduced temperature associated with entry into MODE 4 the probability and consequences of a LOCA or MSLB are greatly reduced. The Containment Cooling System is required OPRABLE in MODE 4 and is available to provide depressurization and cooling capability. >

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WATERFORD - UNIT 3 B 3/4 6-3 i

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