ML17335A234

Proposed Tech Specs Page 3/4 5-6,revising Runout Limits for SI Pump to 675 Gpm Unless Pump Is Specifically Tested to Higher Flow Rate Not Exceeding 700 Gpm

ML17335A234
Person / Time
Site:	Cook
Issue date:	09/14/1998
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17335A233	List: ML17335A231 ML17335A234
References
NUDOCS 9809220084
Download: ML17335A234 (14)

Text

'3/4 LIMITINGCONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS 3/4,5 EMERGENCY CORE COOLING SYSTEMS (ECCS)..

SURVEILLANCE RE UIREMENTS Continued At least once per 18 months.

Boron Injection Safety Injection Throttle Valves Throttle Valves Valve Number Valve Number

1. 1-SI-141 Ll 1. 1-SI-121 N

2. 1-SI-141 L2 2. 1-SI-121 S

3. I-SI-141 L3

4. 1-SI-141 L4

h. By performing a flow balance test during shutdown following completion of modifications to the ECCS subsystem that alter the subsystem flow characteristics and verifying the following flow rates:

Boron Injection System Safety Injection System Single Pump* Single Pump~~

Loop 1 Boron Injection Flow Loop 1 and 4 Cold Leg 117.5 gpm Flow 2 300 gpm Loop 2 Boron Injection Flow Loop 2 and 3 Cold Leg 117.5 gpm Flow 2 300 gpm Loop 3 Boron Injection Flow Combined Loop 1, 2, 3 and 4 Cold Leg 117.5 gpm Flow (single pump) less than or equal to 640 gpm. Total SIS (single pump) flow, including Loop 4 Boron Injection Flow minifiow, shall not exceed 00 gpm.

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7 Boron Injection (BI) line should be justed to provide 117.5 gpm (nominal) flow in each

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loop. Under these conditions there is zero mini flo and 80 gpm plus or minus 5 gpm simulated RCP seal injection line flow.

The actual flow in each BI line may deviate from the nominal so long as:

a) the difference between the highest and lowest flow is 25 gpm or less.

b) the total flow to the four branch lines does not exceed 470 gpm.

c) the minimum flow (total fiow) through the three most conservative (lowest fiow) branch lines must not be less than 300 gpm.

d) the charging pump discharge resistance (2.31 x Pd/Qd ) must not be less than 4.73E-3 ft/gpm and must not be greater than 9.27E-3 ft/gpm2, (Pd is the pump discharge pressure at runout; Qd is the total pump flow rate.)

COOK NUCLEAR PLANT-UNIT I Page 3/4 54 AMENDMENTQ8, 126 9809220084 9809i4 PDR, ADOCK 05000Si5 P 'DR

1 a EMERGENCY CORE COOLING SYSTEM With the RCS temperature below 350 F, one OPERABLE ECCS subsystem is acceptable without single fai.luxe consideration on the basis of the stable reactivity condition of the reactor and the limited core cooling requirements.

The limi.tation for a maximum of one centrifugal charging pump to be OPERABLE and the Surveillance Requirement to verify all charging pumps and safety infection pumps, except the required OPERABLE charging pump, to be inopex'able below 152 F provices assurance that a mass addi.tion pressure transient can be relieved by the operation of' single PORV.

The Surveillance Requirements pxovided to ensure OPERABILITY of each component ensux'es that at a minimum, the assumpti.ons used in the safety analyses axe met and that subsystem OPERABILITY is maintained. Survei.llance requirements for throttle valve position stops and flow balance testing provide assurance that proper ECCS flows will be maintained in the event of a LOCA. Maintenance of proper flow resistance and pressure drop in the piping system to each injection point is necessary to: (1) prevent total pump flow from exceedXn runout conditions when the system is in its minimum resistance confi.guratio (2) px'ovide the proper flow split between in)ection points in accordance wi.th the assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level of total ECCS flow to all in)ection points equal to or above that assumed in the ECCS-LOCA analyses.

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'SPY/MS ~+am l~ ~ / 6'~gP"~MpM+gAM COOK NUCLEAR PLANT - UNIT 1 B 3/4 5-2 AMENDMENT NO. gJr. ging f67,

UNIT NO. 2 3/4 LIMITINGCONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS 3/4,5 EMERGENCY CORE COOLING SYSTEMS (ECCS)

SURVEILLANCE RE UIREMENTS Continued

2. At least once per 18 months.

Boron Injection Safety Injection Throttle Valves Throttle Valves Valve Number Valve Number

1. 2-SI-141 Ll 1. 2-SI-121 N

2. 2-SI-141 L2 2. 2-SI-121 S

3. 2-SI-141 L3

4. 2-SI-141 L4

h. By performing a flow balance test during shutdown following completion of modifications to the ECCS subsystem that alter the subsystem flow characteristics and verifying the following flow rates:

Boron Injection System Safety Injection System Single Pump Single Pump Loop 1 Boron Injection Flow Loop 1 and 4 Cold Leg 117.5 gpm Flow greater than or equal to 300 gpm Loop 2 Boron Injection Flow Loop 2 and 3 Cold Leg 117.5 gpm Flow greater than or equal to 300 gpm Loop 3 Boron Injection Flow Combined Loop 1,2,3 and 4 Cold Leg Flow 117.5 gpm (single pump) less than or equal to 640 gpm.

Loop 4 Boron Injection Flow Total SIS (single pump) flow, including 117.5 gpm miniflow, shall not exceed 700 gpm.

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Ag/hd'r //o~ up do ~7 ma+/maser 'l The flow rate in each boron injection (Bl) line should be adjusted to provide 117.5 gpm (nominal) flow into each loop. Under these conditions there is zero mini-flow and 80 gpm plus or minus 5 gpm simulated RCP seal injection line flow. The actual flow in each BI line may deviate from the nominal so long as; a) the difference between the highest and lowest flow is 25 gpm or less.

b) the total flow to the four branch lines does not exceed 470 gpm. ~

c) the minimum fiow through the three most conservative (lowest flow) branch lines must not be less than 300 gpm, d) the charging pump discharge resistance (2.31 x Pd/Qd ) must not be less than 4.73E-3 ft/gpm and must not be greater than 9.27E-3 ft/gpm, (Pd is the pump discharge pressure at runout; Qd is the total pump fiow rate).

COOK NUCLEAR PLANT-UNIT2 Page 3/4 5-6 AMENDMENT64, 134

EMERGENCY CSEE COOLZNC SYST~'fS BASES

r. 0 Pith the RCS tern'perature beloM 350 F, one OPERABLE ECCS subsystem is acceptable without single failure consideration, on the basis of the stabLe reactivity condition of the reactor and the limited core cooling requirements.

The limication for a maximum of one cencrifugal charging pump to be OPERABLE and the Surveillance Requirement to verify all charging pumps and safety injection pumps, excepc the required OPERABLE charging pump, co be inoperable below l52 0 F provides assurance that a mass addition pressure cransienc can be relieved by the operation of a single PORV.

The Surveillance Requirements provided to ensure OPERABILITY of each componen-ensures that ac a minimum, the assumptions used in the safety analyses are me" and that subsyscem OPERABILITY is maintained. Surveillance requirements for throctle valve posicion stops and flov balance testing provide assurance chat proper ECCS flows vill be maintained in the evenc of a LOCA. -Maintenance of proper fle~ resistance and pressure drop in the piping system to each injection point is necessary co: (l) prevent total pump flow from exceeding runouc condicions Mhen the syscem is in its minimum resiscance configuratio (2) provide the proper floM split becveen injection points in accordance with the assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level of total'ECCS flow to all injection poincs equal co or above that assumed in the ECCS-LOCA analyses.

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ATTACHMENT 3 TO AEP:NRC:1274 PROPOSED AMENDMENT TO THE DONALD C. COOK NUCLEAR PLANT UNITS NO. 1 AND 2 TECHNICAL SPECIFICATION SAFETY INJECTION PUMP RUNOUT FLOW LIMITS

0 3/4 LIMITINGCONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS 3/4.5 EMERGENCY CORE COOLING SYSTEMS (ECCS)

SURVEILLANCE RE UIREMENTS Continued At least once per 18 months.

Boron Injection Safety Injection Throttle Valves Throttle Valves Valve Number Valve Number

1. 1-SI-141 Ll 1. 1-SI-121 N

2. 1-SI-141 L2 2. 1-SI-121 S

3. 1-SI-141 L3

4. 1-SI-141 L4

h. By performing a flow balance test during shutdown following completion of modifications to the ECCS subsystem that alter the subsystem flow characteristics and verifying the following flow rates:

Boron Injection System Safety Injection System Single Pump* Single Pump**

Loop 1 Boron Injection Flow Loop 1 and 4 Cold Leg 117.5 gpm Flow 2 300 gpm Loop 2 Boron Injection Flow Loop 2 and 3 Cold Leg 117.5 gpm Flow 2 300 gpm Loop 3 Boron Injection Flow Combined Loop 1, 2, 3 and 4 Cold Leg 117.5 gpni Flow (single pump) less than or equal to 640 gpm. Total SIS (single pump) flow, including miniflow, shall not exceed 675 gpm unless the Loop 4 Boron Injection Flow pump is specifically qualified to a higher flow 117.5 gpm up to a maximum of 700 gpm.

• The flow rate in each Boron Injection (BI) line should be adjusted to provide 117.5 gpm (nominal) flow in each loop. Under these conditions there is zero miniflow and 80 gpm plus or minus 5 gpm simulated RCP seal injection line flow.

The actual flow in each BI line may deviate from the nominal so long as:

a) the difference between the highest and lowest flow is 25 gpm or less.

b) the total flow to the four branch lines does not exceed 470 gpm.

c) the minimum flow (total flow) through the three most conservative (lowest flow) branch lines must not be less than 300 gpm.

d) the charging pump discharge resistance (2.31 x Pd/Qd ) must not be less than 4.73E-3 ft/gpm and must not be greater than 9.27E-3 ft/gpm2, (Pd is the pump discharge pressure at runout; Qd is the total pump flow rate.)

COOK NUCLEAR PLANT-UNIT 1 Page 3/4 5-6 AMENDMENT98, 426,

3/4 BASES 3/4.5 EMERGENCY CORE COOLING SYSTEMS 3/4.5.'2 and 3/4.5.3 ECCS SUBSYSTEMS Continued With the RCS temperature below 350'F, one OPERABLE ECCS subsystem is acceptable without single failure consideration on the basis of the stable reactivity condition of the reactor and the limited core cooling requirements.

The limitation for a maximum of one centrifugal charging pump to be OPERABLE and the Surveillance Requirement to verify all charging pumps and safety injection pumps, except the required OPERABLE charging pump, to be inoperable below 152'F provides assurance that a mass addition pressure transient can be relieved by the operation of a single PORV.

The Surveillance Requirements provided to ensure OPERABILITYof each component ensures that at a minimum, the assumptions used in the safety analyses are met and that subsystem OPERABILITY is maintained. Surveillance requirements for throttle valve position stops and flow balance testing provide assurance that proper ECCS flows will be maintained in the event of a LOCA. Maintenance of proper flow resistance and pressure drop in the piping system to each injection point is necessary to: (1) prevent total pump flow from excccding runout conditions when the system is in its minimum resistance configuration*, (2) provide the proper flow split between injection points in accordance with the assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level of total ECCS flow to all injection points equal to or above that assumed in the ECCS-LOCA analyses.

Observing these limits while flow balancing the SI pumps in the injection mode will ensure they are not exceeded in the recirculation mode (RHR pumps providing a suction pressure boost) due to the higher system resistance resulting from splitting of the Sl trains when in the recirculation lineup.

COOK NUCLEAR PLANT-UNIT 1 Page B 3/4 5-2 AMENDMENT88, 488, 4CP,

A J

3/4 LIMITINGCONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS 3/4.5 EMERGENCY CORE COOLING SYSTEMS (ECCS)

SURVEILLANCE RE UIREMENTS Continued

2. At least once per 18 months.

Boron Injection Safety Injection Throttle Valves Throttle Valves Valve Number Valve Number

1. 2-SI-141 L1 1. 2-SI-121 N

2. 2-SI-141 L2 2. 2-SI-121 S

3. 2-SI-141 L3

4. 2-SI-141 L4

h. By performing a flow balance test during shutdown following completion of modifications to the ECCS subsystem that alter the subsystem flow characteristics and verifying the following flow rates:

Boron Injection System Safety Injection System Single Pump Single Pump Loop 1 Boron Injection Flow Loop 1 and 4 Cold Leg 117.5 gpm Flow greater than or equal to 300 gpm Loop 2 Boron Injection Flow Loop 2 and 3 Cold Leg 117.5 gpm Flow greater than or equal to 300 gpm Loop 3 Boron Injection Flow Combined Loop 1,2,3 and 4 Cold Leg Flow 117.5 gpm (single pump) less than or equal to 640 gpm.

Total SIS (single pump) flow, including Loop 4 Boron Injection Flow miniflow, shall not exceed 675 gpm unless the 117.5 gpm pump is specifically qualified to a higher fiow up to a maximum of 700 gpm.

The flow rate in each boron injection (BI) line should be adjusted to provide 117.5 gpm (nominal) flow into each loop. Under these conditions there is zero mini-flow and 80 gpm plus or minus 5 gpm simulated RCP seal injection line flow. The actual flow in each BI line may deviate from the nominal so long as:

a) the difference between the highest and lowest flow is 25 gpm or less.

b) the total flow to the four branch lines does not exceed 470 gpm.

c) the minimum flow through the three most conservative (lowest flow) branch lines must not be less than 300 gpm, d) the charging pump discharge resistance (2.31 x Pd/Qd ) must not be less than 4.73E-3 ft/gpm and must not be greater than 9.27E-3 ft/gpm2, (Pd is the pump discharge pressure at runout; Qd is the total pump flow rate).

COOK NUCLEAR PLANT-UNIT2 Page 3/4 5-6 AMENDMENT64, 434,

r 3/4 BASES 3/4.5 EMERGENCY CORE COOLING SYSTEMS 3/4.5'.2 and 3'/4.5.3 ECCS SUBSYSTEMS Continued With the RCS temperature below 350'F, one OPERABLE ECCS subsystem is acceptable without single failure consideration on the basis of the stable reactivity condition of the reactor and the limited core cooling requirements.

The limitation for a maximum of one centrifugal charging pump to be OPERABLE and the Surveillance Requirement to verify all charging pumps and safety injection pumps, except the required OPERABLE charging pump, to be inoperable below 152'F provides assurance that a mass addition pressure transient can be relieved by the operation of a single PORV.

The Surveillance Requirements provided to ensure OPERABILITY of each component ensures that at a minimum, the assumptions used in the safety analyses are met and that subsystem OPERABILITYis maintained. Surveillance requirements for throttle valve position stops and flow balance testing provide assurance that proper ECCS flows will be maintained in the event of a LOCA. Maintenance of proper flow resistance and pressure drop in the piping system to each injection point is necessary to: (1) prevent total pump flow from exceeding runout conditions when the system is in its minimum resistance configuration*, (2) provide the proper flow split between injection points in accordance with the assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level of total ECCS flow to all injection points equal to or above that assumed in the ECCS-LOCA analyses.

Observing these limits while flow balancing the SI pumps in the injection mode will ensure they are not exceeded in the recirculation mode (RHR pumps providing a suction pressure boost) due to the higher system resistance resulting from splitting of the SI trains when in the recirculation lineup.

COOK NUCLEAR PLANT-UNIT2 Page B 3/4 5-2 AMENDMENTBQ, kQ,