ML20070F343

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Proposed Tech Specs Increasing Surveillance of Containment Spray Sys Header Air or Smoke Flow Test from Five to Ten Years
ML20070F343
Person / Time
Site: Catawba, McGuire, Mcguire  Duke Energy icon.png
Issue date: 07/13/1994
From:
DUKE POWER CO.
To:
Shared Package
ML20070F337 List:
References
NUDOCS 9407190015
Download: ML20070F343 (7)
v • d • e


Text

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CONTAINMENT SYSTEMS

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3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS ,

CONTAINMENT SPRAY SYSTEM LIMITING CONDITION FOR OPERATION ,

i 3.6.2 Two independent Containment Spray Systems shall be OPERABLE with each Spray System capable of taking suction from the refueling water storage tank and transferring suction to the centainment sump.

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

ACTION:

With one Containment Spray System inoperable, restore the incoerable Spray System tc 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. hours; restore the inoperable Spray System to OPEFABLE status t71 thin 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

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4.6.2 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 in its correct position; i b. By verifying, that on recirculation flow, each pump develops a differential pressure of greater than or equal to 185 psid when tested pursuant to Specification 4.0.5;
c. At least once per 18 so.'ths during shutdown,* by: l
1) Verifying that each automatic valve in the flow path actuates to its correct position on a Phase "B" Isolation test signal, and

$m 2) Verifying that each spray pump starts automatically on a CBE Phase "B" Isolation test signal.

so 00 3) Verifying that each spray pump is prevented from starting by O' "

the Containment Pressure Control System when the containment Q

oo atmosphere pressure is less than or equal to 0.25 psid, and is allowed to start at greater than or equal to 0.45 psid SS relative to the outside atmosphere, i i l ll \, ,

n he t i re u n f)w:dme# Mo, (L//itb CATAWBA - UNITS 1 & 2 3/4 6-18

/)merdet- Alc, l [th ri-d)

CONTAINMENT SYSTEMS i

i SURVEILLANCE REOUIREMENTS (Continued)

4) Verifying that each spray pump discharge valve closes or is prevented from opening by the Containment Pressure Control System when the containment atmosphere pressure is less than or equal to 0.25 psid and is allowed to open at greater than or equal to 0.45 psid relative to the outside atmosphere, and
5) Verifying that each spray pump is automatically deenergized by the Containment Pressure Control system when the containment atmosphere pressure is less than or equal to 0.25 psid relative to the outside atmosphere.

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

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/bcht No, (tA',ti)

CATAWBA - UNITS 1 & 2 3/4 6-19 fwd #0, @n'itM

NO CHANGES THIS PAGE.

FOR INf 0RMAll0N ONLY CONTAINMENT SYSTEMS

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BASES i

3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS- ,

The OPERABILITY of the Containment Spray System ensures that containment '

depressurization and cooling capability will be available in the event of a LOCA. The pressure reduction and resultant lower containment leakage rate are consistent with the assumptions used in the safety analyses. However, the Containment Spray System also provides a mechanism for removing iodine from the containment atmosphere, and therefore the time requirements for restoring an inoperable Spray System to OPERABLE status have been maintained consistent with those assigned other inoperable ESF equipment.

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 atmosphere or pressurization of the containment and is consistent with the requirements of GDC 54 through 57 of Appendix A to 10 CFR Part 50. Containment isolation within the time limits specified for those isolation. valves designed to close auto-( matically ensures that the release of radioactive material to the environ-ment will be consistent with the assumptions used in the analyses for a LOCA.

3/4.6.4 COMBUSTIBLE GAS CONTROL The OPERABILITY of the equipment and systems required for the detection and contro'1 of hydrogen gas ensures that this equipment will be available to maintain the hydrogen concentration wittin containment below its flammable limit during post-LOCA conditions. Either recombjner unit is capable of .

controlling the expected hydrogen generation associated with: (1) zirconium- I water reactions, (2) radiolytic decomposition of water, and (3) corrosion of metals within containment. These Hydrogen Control Systems are consistent with the recommendations of Regulatory Guide 1.7, " Control of Combustible Gas Concentrations Following a LOCA," March 1971.

The OPERABILITY of at least 35 to 36 igniters per train (70 of 72 for both  ;

trains) ensures that the Distributed Ignition System will maintain an effective coverage throughout the containment provided the two inoperable ignitors are' not on corresponding redundant circuits which provide coverage for the same region.

This system of igniters will initiate combustion of any significant amount of hydrogen released after a degraded core accident. This system is to ensure burning in a controlled manner as the hydrogen is released instead of allowing it to be ignited at high concentrations by a random ignition source.

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CATAWBA - UNITS 1 & 2 B 3/4 6-4

ATTACILTIENT 4h I'ROPOSED TECIINICAL SI'ECIFICATION ASIENDNIENTS FOR AICGUIRE i

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CONTAINMENT SYSTEMS NO CH ANGES THIS PAGE.

FOR INFORMA110N ONLY

~3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS

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CONTAINMENT SPRAY SYSTEM LIMITING CONDITION FOR OPERATION 3.6.2 Two independent Containment Spray Systems shall be OPERABLE with each Spray System capable of taking suction from the RWST and transferring suction to the containment sump.

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

ACTION:

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 be in at least HOT STANDBY within the next-6 hours; restore the inoperative 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 4.6.2 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 in its correct position;
b. By verifying, that on recirculation flow, each pump develops a discharge pressure of greater than or equal to 185 psig when tested pursuant to Specification 4.0.5;
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 Containment Phase B Isolation test signal,
2) Verifying that each spray pump starts automatically on a Containment Phase B Isolation test signal,  ;

- l McGUIRE - UNITS 1 and 2 3/4 6-20 ,

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CONTAINMENT SYSTEMS

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SURVEILLANCE REQUIREMENTS (Continued)

3) Verifying that the Containment Pressure Control System func- <;

tions within the setpoint limits specified in Table 3.3-4, l; Item 6. d a

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

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1 McGUIRE - UNITS 1 and 2 3/4 6-21 Amendment No. (Unit 1)

Amendment No. (Unit 2) i l

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l NO CHANGES THIS FAGE.

C0NTAINMENT SYSTEMS FOR INf 0RMAll0N ONLY BASES

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3/4.6.1.9 CONTAINMEhf VENTILATION SYSTEM (Continued) i Leakage integrity tests with a maximum allowable leakage rate for contain-ment purge supply and exhaust supply valves will provide early indication of resilient material seal degradation and will allow opportunity for repair before gross leakage failures could develop. The 0.60 L leakage limit of Specifica-tion 3.6.1.2b. shall not be exceeded wrien the leakage 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 tests.

3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS CONTAINMENT SPRAY SYSTEM The OPERABILITY of the Containment Spray System ensures that containment depressurization and cooling capability will be available in the event of a LOCA. The pressure reduction and resultant lower containment leakage rate are consistent with the assumptions used in the accident analyses.

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 atmosphere or pressurization of the containment and is consistent with the requirements of (

GDC 54 thru 57 of Appendix A to 10 CFR Part 50. Containment isolation within the time limits specified for those isolation valves designed to close automatically ensures that the release of radioactive material to the environment wi.' be consistent with the assumptions used in the analyses for a LOCA.

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Containment isolation valves are listed in FSAR Table 6.2.4-1. Those valves with a required isolation time have a value given in the " MAX ISOLATION TIME (SEC)" column. Penetration test type (type B, type C, or None) is listed in the " TEST TYPE" column of the table for each containment penetration.

l Changes to the FSAR are made in accordance with 10 CFR 50.59.

3/4.6.4 COMBUSTIBLE GAS CONTROL I 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 flammable l limit during post-LOCA conditions, Either recombiner unit is capable of l controlling the expected hydrogen generation associated with: (1) zirconium-l water reactions, (2) radiolytic decomposition of water, and (3) corrosion of i metals within containment. These hydrogen control systems are consistent with I

the recommendations of Regulatory Guide 1.7, " Control of Combustible Gas  ;

Concentrations in Containment Following a LOCA", March 1971.

The OPERABILITY of at least 64 of 66 igniters ensures that the Distributed 4 Ignition System will maintain an effective coverage throughout the containment.  ;

This syst m of igniters will initiate combustion of any significant amount of. '

hydrogen released after a degraded core accident. This system is to ensure burning in a controlled manner as the hydrogen is released instead of allowing it to be ignited at high concentrations by a random ignition source.

McGUIRE - UNITS 1 and 2 B 3/4 6-4 Amendment No.122(Unit 1)

Amendment No.104(Unit 2)

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