ML20101B080

Proposed TS 3.8.2.5 Re Containment Penetration Conductor Overcurrent Protective Devices

ML20101B080
Person / Time
Site:	Arkansas Nuclear
Issue date:	04/29/1992
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20101B079	List: 2CAN049205, Revises 910627 Application for Amend to License NPF-6, Changing TS 3.8.2.5 & Associated Bases Re Containment Penetration Conductor Overcurrent Protective Devices,Per NRC Request ML20101B080
References
NUDOCS 9205050261
Download: ML20101B080 (5)

Text

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PROPOSED TECilNICAL SPECIhCATION CilANGES re l-l'.

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ELECTRICAL POWER SYSTEMS CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES LIMITIHQ.,@SDITION FOR Of1RARQN 3.0.2.5 All containment pene, ration conductor overcurrent protective devices shown in Table 3.8-1 shall.be OPERABLE.

APPLICABILITY: MODES 1, 2, " nd 4.

l ACTION

• With one or more of the containment penetration conductor overcurrent

. protective devicea shown in Table 3.8-1 inoperable:

a.

De-energize the circutt(s) by tripping the associated backup circuit breaker within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and verifying the backup circuit breaker to be tripped at least once per 7 days thereafter; the provisions of-Specification 3.0.4 are not applicable to overcurrent devices in circuits which have their backup circuit breakers tripped, or b.-

Be in at least 110T STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SIIUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

ElRVEILLANCE REQQJREMENT_S_

4.8.2.5 All containment penetration conductor overcurrent protective devices shown in Table 3.8-1 shall be demonstrated OPERABLE in accordance with the manufacturers' recommendations:

a.'

At least once per 18 months:

1.

For at least one 6.9 kV reactor coolanc pump circuit, such that all reactor coolant pump circuits and their associated backup circuits are demonstrated OPERABLE at 1 cast each 72 months by performance of:

l.

(a) A CilANNEL CALIBRATION of the associated protective relays, and (b) 'An integrated system functional test which includes simulated automatic actuation of the system and verifying that each relay and associated circuit L

breakers and control circuits function as designed.

2.

For each type of 480 volt air frame protective device, such that all 480 volt air-frame protective devices are demonstrated OPERABLE'at least once each N x 18 months, where N is the number of devices of each type, by performance of:

(a) A calibration of the protective relays for devices that are actuated by protective relays which includes verification of_the range, accuracy, and alarm / trip capability, Land i

ARKANSAS --UNIT 2 3/4 8-11 Amendment No. )),

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. ELECTRICAL POWER SYST&d$

S.0LYX1LLANCE REQUIREMENTS (Cont,igued)

(b)- A functional test et protective devices that are actuated by protective relays which veriffes that the protective device trips when its associated protective relays actuate, and j

1 (c) A functional test which consists of injecting primary current in each overcurrent element mounted on the protective device at the specified setpoint and verifying that the protective device trips when each overcurrent element actuates.

If any protective device fails to function as designed, all other prrtoctivo devices of the same type shall be-tested.

3.

For mo' caso protectivo devices, such that all protective-device,m. each type are demonstrated OPERABLE at least once l

each N x 18 months, where N is the number of devices of each type, by performance oft (a) A functional test of at least one protectivo device of each type which consists of injection of primary current at t.he specified setpoint.to the protectivo device and verifying that the protective device trips when the overcurrent elements are actuated.

If any protective device falls to function as designed, all other protective devices of'the same type shall be tested, b.

At least once per 60 months, by performing inspections and preventive maintenance on each protective device in accordance with-procedures prepared in conjunction with its manufacturer's recommendations.

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v ARKANSAS UNIT l2 3/4 8-12 Amendment No. $),

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e-TABLE 3.8-1 (Continuedl

{ QHL f n - 7,f18ETRATION CONDUCTOR OVER.C_URRENT PRQ7ECTIVE DEVICES Priniary Backup Location

%v.co Device of System

,f ar Nurnber Devices Powered SV (2-61H6 MCC 2B6)

Saf ty Inject.

Tas i 2T2C Dis.aarge MOV 2CV-5043-2 52-61G2 57 61K8 MCC 2B61 Check Valve Leakage Drain Valve 2CV-5106-2 52-31G1 52-31G2 MCC 2B31 Pzr Spray Isolation Valvo 2CV-*654 52-41F4 42-41F5 MCC 2B41 Pzr Spray Isolation Valve 2CV-4656

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ARKANSAS - UNIT 2 3/4 8-17a Amendment No. 75, (39, l

's 3/4.8 ELECTRICAL POWER SYSTEMS DASES The OPERABILITY of the A.C. snd D.C. power sources and associated distribution systems during operation ensures that sufficient power will be availabic to supply the safety-related equ;pment required for 1) the safe shutdown of the facility and 2) the mitigation and control of accident conditions within the facility.

The minimum specified independent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of General Design Cr!teria 17 of Appendix "A" to 10 CFR 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the accident analyses and are based upon maintaining at least one redundant set of onsite A.C. and D.C. power sources and associated distribution systems OPERABLE

-during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that 1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2; sufficient inst o'entation and control capability is available for monitoring and maintal..;n; the ur.it status.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9 "Solection of Diesel Generator Set Capacity for Standby Power Supplies", March 10, 1971, and 1.108 " Periodic Testing of Giesel Generator Units Used as Onsite Electric Power Systems at Nuclear Pcwer Plants", Revision 1, August 1977.

Containment aleccrical penetrations and penetration conductors are protected by either de-energizing circuits not required during reactor operation or by demonstrating the OPERABILITY of primary and backup overenrrent protection circuit breakers during periodic surveillance. The 6.9 kv reactor coolant pump protective devices utilize protective relays as overcurrent elements. The protective device trips when the associated relays actuate. The 480 volt air frame protective devices utilize electro-mechanical overcurrent elements which are mounted on the protective dev e and, in some instances, protective relays to trip the protcctivo device.

Actuation of the overcurrent element or relay will trip the protective device.

The molded case protective devices utiliza magnetic or thermal-magnetic over-

.:urrent elements which are contained in the protective device. Actuation of each overcurrent element will t rip the protective device.

ARKANSAS - UNIT 2 3 3/4 8-1 Amendment No.

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