ML20064N955

Proposed Changes to Tech Spec 3/4.8.3 Re Electrical Equipment Protective Devices

ML20064N955
Person / Time
Site:	Seabrook
Issue date:	09/09/1982
From:	PUBLIC SERVICE CO. OF NEW HAMPSHIRE
To:
Shared Package
ML20064N942	List: ML20064N938 ML20064N955
References
NUDOCS 8209130046
Download: ML20064N955 (3)

Text

SB 1 & 2 ELECTRICAL POWER SYSTEMS 3/4.8.3 ELECTRICAL EQUIPMENT PROTECTIVE DEVICES CONTAINMENT PENETRATION CONDUCTOR OVERCURRENT PROTECTIVE DEVICES LIMITING CONDITION FOR OPERATION i

4 l, 3.3.3.1 All containment penetration conductor overcurrent protective devices i

i show in Table 3.8-1 shall be OPERABLE.

APPLICABILITY: MODES 1, 2, 3 and 4.

ACTION:

With one or more of the containment penetration conductor overcurrent j protective device (s) shown in Table 3.8-1 inoperable:

n. Restore the protective device (s) to OPERABLE status or de-energize the circuit (s) by tripping the associated backup circuit breaker l

l within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> and verify 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 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 /> and 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 />.

3.8.3.2 The circuit breakers feeding the following loads inside containment

! shall be padlocked in the open position:

l POLAR GANTRY CRANE (MM-CR-3)

DISTRIBUTION PANEL PP-7A DISTRIBUTION PANEL PP-7B i

APPLICABILITY: MODES 1,2, 3 and 4 f EXCEPTION: If any of the above mentioned loads are required for brief I durations (not to exceed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />) during plant operation, the pertinent circuit breaker can be unlocked and be closed for the required duration provided this change in breaker I position becomes part of the applicable operating procedure l

used for the work inside containment.

I SURVEILLANCE REQUIREMENTS 4.8.3.1 All containment penetration conductor overcurrent protective devices shown in Table 3.8-1 shall be demonstrated OPERABLE:

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a. At least once per 18 months:

1. By verifying that the medium voltage (13.8 kV) circuit breakers are OPERABLE by selecting, on a rotating basis, at least 10% of the circuit breakers and performing the following:

(a) A CHANNEL CAL 1BRATION of the associated protective relays.

l (b) An integrated system functional test which includes simulated automatic actuation of the system and verifyir?,

that each relay and associated circuit breaker and control circuit functions as designed and as specified in Table 3.8-1.

(c) For each circuit breaker found inoperable during these functional tests, an additional representative sample of at least 10% of all circuit breakers of the inoperable type shall also be functionally tested until no more failures ere found or all circuit breakers of that type have been functionally tested.

2. By selecting and functionally testing a representative sample of at least 10% of each type of lower voltage circuit breakers and overload heaters. Circuit breakers and overload heaters selected for functional testing shall be selected on a rotating basis. The functional test shall consist of injecting a current input at the specified setpoint to each selected circuit breaker or overload heater and verifying that each circuit breaker or overload heater functions as designed. Circuit breakers or overload heaters found inoperable during functional testing l shall be restored to OPERABLE status prior to resuming operation. For each circuit breaker or overload heater found inoperable during these functional tests, an additional representative sample of at least 10% of all the circuit breakers or overload heaters of the inoperable type shall also be functionally tested until no more failures are found or all circuit breakers or overload heaters of that type have been functionally tested.

3. By selecting and functionally testing a representative sample of '

( each type of fuse on a rotating basis. Each representative sample of fuses shall include at least 10% of all fuses of that type. The functional test shall consist of a non-destructive resistance measurement test which demonstrates that the fuse meets its camjfacturer's design criteria. Fuses found inoperaF'e eraring these functional tests shall be replaced with OPERA %i ft es prior to resuming operation. For each fuse found l

ir $ W ale . uring these functional tests, an additional l

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rer-----!:;1ve st.mple of at least 10% of all faaes of that type shall be functionally tested until'no more failures are focnd or all fuses of that type have been functionally tested.

At least once per 60 months by subjecting each circuit breaker co an' inspection and preventive maintenance in accordance with procedures prepared in conjunction with its manufacturer's recommendations.

4.8.3.2 Verif y at least occe per 7 days that Lse circuit breakers listed in 3.8.3.2 are padlocked in the open position.

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