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Proposed Tech Specs,Reflecting two-unit Operation of RHR Svc Water Sys & Emergency Svc Water Sys
	ML20244B268
Person / Time
Site:	Limerick
Issue date:	04/10/1989
From:	; PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	;
Shared Package
ML20244B264	List: ML20244B262; ML20244B268;
References
	NUDOCS 8904190097
	Download: ML20244B268 (7)
	v • d • e

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w LIMERICK GENERATING: STATION.

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r Docket'No. 50-352.-

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License No. NPF-39.-

7 iU TECHNICAL SPECIFICATION-CHANGES

.l4.3

,s 3.7.1.1 Residual Heat Removal Service Water System

3.7.1.2 Emergency Service Water System

.Affected Pages 3/4 7-1 3/4~7-2 3/4 7-3 3/4 7-4 B 3/4.7-1 B 3/4 7-la I

8904190097 890410 PDR ADOCK 05000352 j

P.

PDC 1

3/4.7 PLANT SYSTEMS 3/4.7.1 SERVICE WATER SYSTEMS RESIDUAL HEAT REMOVAL SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION l

3.7.1.1 At least the following independent residual heat removal service water

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(RHRSW). system subsystems, with each subsystem comprised of:

a.

-Two OPERABLE RHRSW pumps, and b.

An OPERABLE. flow path capable of taking suction from the RHR service water pumps wet pits which are supplied from the spray pond or the cooli,ng tower basin and transferring the water through one Unit 1 RHR

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heat exchanger, shall be OPERABLE:

a.

In OPERATIONAL CONDITIONS 1, 2, and 3,.two subsystems, b.

In OPERATIONAL CONDITIONS 4 and 5, the subsystem (s) associated with systems and components required OPERABLE by Specification 3.4.9.1, 3.4.9.2, 3.9.11.1, and 3.9.11.2.

APPLICABILITY:

OPERATIONAL CONDITIONS 1, 2, 3, 4, and 5.

ACTION:

3.

a.

In OPERATIONAL CONDITION 1, 2, or 3:

1.

With one RHRSW pump inoperable, restore the inoperable pump to OPERABLE status within 30 days, or be in at lecst HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

0 2.

With one RHRSW pump in each subsystem inoperable, restore at least one of the inoperable RHRSW pumps to OPERABLE status within 7 days or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

3.

With one RHRSW subsystem otherwise inoperable, restore the inoperable subsystem to GPERABLE status with at least one OPERABLE RHRSW pump within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

4.

With both RHRSW subsystems otherwise inoperable, restore at least one subsystem to OPERABLE status within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWH* within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

Whenever both RHRSW subsystems are inoperable, if unable to attain COLD SHUTDOWN when required by this ACTION, maintain reactor coolant temperature as low as practical by use of alternate heat removal methods.

LIMERICK - UNIT 1 3/4 7-1

l-CIMITING. CONDITION FORl0PERATION5(Continued) i ACTION:

(Continued) m 5.-

With less.than three OPERABLE' diesel generators capable of powering the associated OPERABLE RHRSW pumps:

a)

With two OPERABLE pumps' capable of being powered from their

.0PERABLE diesel generators verify the capability to power at

'least a third OPERABLE pump from any OPERABLE diesel generator within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter.

In the absence of.this'capabi'lity, restore the capability to power at least a third OPERABLE RHRSW pump from any OPERABLE di.esel generator within 30 days or be'in at least HOT SHUTDOWN'within the.next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

The provisions of Specifications 3.0.4 are not app'licable, b)

With one OPERABLE pump capable of being powere'd from its OPERABLE diesel generator, verify the capability to power at

-least a second OPERABLE RHRSW pump from any OPERABLE diesel

. generator within 2' hours and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter Restore the associated OPERABLE diesel generator to at least one additional OPERABLE pump within 7 days or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN

within the-following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

c)

With no OPERABLE pumps capable of being powered from their OPERABLE diesel generators, restore the associated OPERABLE diesel generator to at least one OPERABLE pump within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , or be in at least HOT. SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months 'and in COLD SHUTDOWN

within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

j b.

In OPERATIONAL CONDITION 3 or 4 with the RHRSW subsystem (s), which is

~ associated with an RHR loop required OPERABLE by Specification 3.4.9.1 or 3.'4.9.2, inoperable, declare the associated RHR loop inoperable and take

'the ACTION required by Specification 3.4.9.1 or 3.4.9.2, as applicable..

j c.

'In OPERATIONAL CONDITION 5 with the RHRSW subsystem (s), which is associated with an RHR loop required OPERABLE by Specification 3.9.11.1 or 3.9.11.2, inoperable, declare the associated RHR system inoperable and take the ACTION required by Specification 3.9.11.1 or 3.9.11.2, as applicable'.

SURVEILLANCE REQUIREMENTS 4.7.1.1 At least the above required residual heat removal service water system subsystem (s) shall be demonstrated OPERABLE:

)

a.

At least once per 31 days by verifying that each valve in the flow path that is. not locked, sealed, or otherwise secured in position, is in its correct position.

Whenever both RHRSW subsystems are inoperable, if unable to attain COLD SHUTDOWN when required by this ACTION, maintain reactor coolant temperature as low as practical by use of alternate heat removal methods.

LIMERICK - UNIT 1 3/4 7-2

;- PL AfiT -SYS1 EMS EhiERGENCY SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION 3.7.1.2s At.least 'the following independent ensergency service water system loops, with each loop comprised'of:

j a.

Two OPERABLE emergency service water pumps, and b.

An OPERABLE flow path capable of taking suction from the emergency service water pumps wet pits which are supplied from the spray pond or the cooling tower basin and transferring the water to the associated Unit 1 and common safety-related equipment, shall be OPERABLE:

a.

In OPERATIONAL CONDITIONS 1, 2, and 3, two loops.

b.

In OPERATIONAL CONDITIONS 4, 5, and *, one loop.

APPLICABILITY:

OPERATIONAL CONDITIONS 1, 2, 3, 4, 5, and *.

ACTION:

a.

In OPERATIONAL CONDITION 1, 2, or 3:

1.

With one emergency service' water pump inoperable, restore the inoperable pump to OPERABLE status within 45 days or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

I 2.

With one emergency service water pump in each loop inoperable, restore at least one inoperable pump to 01IRABLE status within 30 days or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

3.

With one emergency service water system loop otherwise. inoperable, declare all equipment aligned to the inoperable loop inoperable **,

restore the inoperable loop to OPERABLE status with at least one OPERABLE pump within 72-hours or be in at least HOT SHUTDOWN within j

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

When nandling irradiated fuel in the secondary containment.

- The diesel generators may t e aligned to the OPERABLE emergency service water system loop provided confirmatory flow testing has been performed.

Those diesel generators not aligned to the OPERABLE emergency service water system loop shall be

. declared inoperable and the actions of 3.8.1.1 taken.

j LIMERICK - UNIT 1 3/4 7-3 w_________-__-__-_-_

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.EMERGDjCY, SERVICE WATER SYSTEM LIMITING CONDITION FOR OPERATION-w Qi ~~

ACTION: (Continued) 4.

With less than two OPERABLE diesel' generators capable of powering

.their associated OPERABLE ESW pumps:

.d)

With only one OPERABLE pump capable of being powered from its OPERABLE diesel generator, restore an OPERABLE diesel generator to at least a second OPERABLE pump within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months , b)

-With no OPERABLE pumps capable of being powered from their

)

OPERABLE diesel generators, restore an OPERABLE diesel generator to at least one OPERABLE pump within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , I

or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months and.in COLD SHUTDOWN within the following 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

\\

b.

In OPERATIONAL CONDITION 4 or 5:

1.

With only one emergency service water pump and its associated flowpath OPERABLE, restore at least two pumps with at least one, flow path to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or declare the associated safety related equipment inoperable and take the ACTION required \\by Specifications 3.5.2 and 3.8.1.2.

i c.

In OPERATIONAL CONDITION

1.

With only one emergency service water pump and its associated flowi path OPERABLE, restore at least two pumps with at least one flow 1

path to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or verify adequate cooling remains available for the diesel generators required to be OPERABLE' or declare the associated diesel generator (s) inoperable and take the ACTION required by Specification 3.8.1.2.

The provisions of Specification 3.0.3 are not applicable.

SURVEILLANCE REQUIREMENTS l

{

4.7.1.2 At least the above required emergency service water system

)

loop (s) shall be demonstrated OPERABLE:

a.

At least once per 31 days by verifying that each valve (manual, power-

. operated, or automatic) that is not locked, sealed, or otherwise secured in position, is in its correct position.

b.

At lenst once per 18 months by verifying that; 1

1.

Each automatic valve actuates to its correct position on its appropriate ESW pump start signal.

l 2.

Each pump starts automatically when its associated diesel generator starts.

l 1~

i

When handling irradiated fuel in the secondary containment.

LIMERICl! - UN!! l 3/4 7-4 L_ _ __ ____

- r f/4.7 PLANT SYSTEMS l

I BASES I

3/4.7.1 SERVICE WATER SYSTEMS The OPERABILITY of the service water systems ensures that sufficient cooling capacity is available for continued operation of safety-related j

equipment during normal and accident conditions. The redundant cooling I

capacity of these systems, assuming a single failure, is consistent with the assumptions used in-the accident conditions within acceptable limits.

The RHR and ESW systems are common to Units 1 and 2 and consist of s

two independent subsystems each with two pumps.

One pump per subsystem i

(loop) is powered from a Unit 1 safeguard bus and the other pump is l

powered from a Unit 2 safeguard bus.

In order to ensure adequate onsite j

power sources to the systems during a loss of offsite power event, the inoperability of these supplies are restricted in a system ACTION statement (a.5 for RHRSW and a.4 for ESW).

These ACTION statements are intended to cover GPERABLE pumps with inoperable emergency power supply situations only.

RHRSW is a manually operated system used for core and containment heat removal.

Each of two RHRSW subsystems has one heat exchanger per unit.

Each RHRSW pump provides adequate cooling for one RHR heat exchanger.

By limiting operation with less than two OPERABLE RHRSW pumps with OPERABLE Diesel Generators, each unit is ensured adequate heat removal capability for the design scenario of LOCA/ LOOP on one unit and simultaneous safe shutdown of the other unit.

Since RHRSW is a I

manually operated system, it is allowable to administratively verify j

(using logs, procedures, or other information) that any emergency power supply can be used to power the remaining OPERABLE pumps.

Each ESW pump provides adequate flow to the cooling loads in its associated loop. With only two divisions of power required for ECCS LOCA mitigation of one unit and one division of power required for safe shutdown of the other unit, one ESW pump provides sufficient capacity to fulfill design requirements.

ESW pumps are automatically started upon start of the associated Diesel Generators. Therefore, 9e allowable out of service times for OPERABLE ESW pumps and their associated Diesel Generators is limited to ensure adequate cooling during a loss of i

offsite power event without manual action to restore power supplies.

The phrase " capable of being powered from an OPERABLE Diesel I

Generator" includes OPERABILITY of the associated Diesel Generator, its support systems, safeguard batteries, battery chargers, 4kV emergency l

l bus undervoltage instrumentation and energization of the AC/DC power distribution networks.

LIMERICK - URIT 1 B 3/4 7-1

Y g

3/4.7.2 CONTROL ROOM EMERGENCY FRESH AIR SUPPLY SYSTEM The OPERABILITY of the control room omergency fresh air supply system ensures that the control room vill remain habitable for operations personnel during and following all design basis

-accident conditions.

Constant purge of the sy3 tem at 1 cfm is sufficient to reduce the buildup of moisture on the adsorbers and HEPA filters.

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 Criterion 19 of Appendix A, 10 CFR Part 50, 3/4.7.3 REACTOR CORE ISOLATION COOLING SYSTEM i

The reactor core isolation cooling (RCIC) system is provided to assure adequate core cooling in the event of reactor isolation from its primary heat sink and the loss of feedwater flow to the reactor vessel without requiring actuation of any of the emergency core cca:ing system equipment.

The RCIC system is conservatively required to be OPERABLE whenever reactor pressure exceeds 150 psig.

This pressure is substantially below that for which low pressure core cooling systems can provide adequate core cooling.

The RCIC system specifications are applicable during OPERATIONAL CONDITIONS 1, 2, and 3 when reactor vessel pressure exceeds 150 psig because RCIC is the primary non-ECCS source of emergency core cooling when the reactor is pressurized.

With the RCIC system inoperable, adequate core cooling is assured by the OPERABILITY of the HPCI system and justifies the specified 14 day out-of-service period.

The surveillance requirements provide adequate assurance that RCIC will be OPERABLE when required.

Although all active components are testable and full flow can be demonstrated by recirculation during reactor operation, a complete functional test requires reactor shutdown.

The pump discharge piping is maintained roll to prevent water hammer damage and to start cooling at the earliest possible moment.

LIMERICK - LilllT 1 B 3/4 7-la l

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ML20244B268

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