ML16341F148

Proposed Tech Specs Re Diesel Generator Outage Times

ML16341F148
Person / Time
Site:	Diablo Canyon
Issue date:	05/12/1989
From:	PACIFIC GAS & ELECTRIC CO.
To:
Shared Package
ML16341F149	List: DCL-89-129, Forwards Application for Amends to Licenses DPR-80 & DPR-82, Consisting of License Amend Request 89-05,changing Tech Spec to Increase Diesel Generator Allowed Outage Time from 72 H to 7 Days ML16341F148 ML16341F150
References
NUDOCS 8905170253
Download: ML16341F148 (8)

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Attachment B

MARKEO-UP TECHNICAL SPECIFICATIONS 3/4 8-2 B 3/4 8-1 3/4 8-2 B 3/4 8-1 2679S/0069K S905i70253 S90512 PDR AoaCK 05000275, P

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ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION ACTION Continued

testing, demonstrate the OPERABILITY of the remaining PERABLE diesel generators by performing Specification 4.8.1.1.2a.2) wi in 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> restore the diesel generator to OPERABLE status within or 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 />.

c.

With one offsite circuit and one diesel generator of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Specifica-tion 4.8.1.1.la. within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> ther e-after; and if the diesel generator became inoperable due to any cause other than preventive maintenance or testing, demonstrate the OPER-ABILITYof the remaining OPERABLE diesel generators by performing Specificat',on 4.8.1. 1.2a.2) within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />; restore at least one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or 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 />.

Restore the other A.C. power source (offsite circuit or diesel generator) to OPERABLE status in accordance with ACTION a. or b.,

as appropriate with the time requirement of that ACTION statement based on the time of initial loss of the remaining inoperable A.C. power source.

A successful test of diesel OPERABILITY per Specification 4.8. 1.1.2a.2) performed under this ACTION statement for OPERABLE diesels or a restored to OPERABLE diesel satisfies the diesel generator test requirement of ACTION a. or b.

d.

With one diesel generator inoperable in addition to ACTION b. or c.

above verify that:

l.

All required systems, subsystems,

trains, components and devices that depend on the remaining OPERABLE diesel generators as a

source of emergency power are also OPERABLE, and 2.

When in NODE 1, 2, or 3 that at least two auxiliary feedwater pumps are OPERABLE.

If these conditions are not satisfied within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 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 />.

• This test is required to be completed regardless of when the inoperable diesel generator is restored to operability.

DIABLO CANYON - UNITS 1 8 2 3/4 8-2 Amendment Nos.

15 and 14

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"3/4.8 ELECTRICAL R SYSTEHS BASES 3/4.8.1 3/4.8.2 and 3/4.8.3 A. C.

SOURCES D.C.

SOURCES and ONSITE POWER STRIBU ION The OPERABILITY of the A.C. and D.C power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety-related equipment 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 Criterion 17 of Appendix A to 10 CFR Part 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 is consist-ent with the initial condition assumptions of the safety analyses and is based upon maintaining sufficient redundancy of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coinci-dent with an assumed loss-of-offsite power and single failure of one onsite A.C. source.

The A.C. and D.C. source allowable out-of-service times are based on Re ulatory Guide 1.93, "Availabilityof Electrical Power Sources,"

ecem er 74>

When one diesel generator is inoperable, there is an additional ACTION requirement to verify that all required systems, subsystems,

trains, components and devices, that depend on the remaining OPERABLE diesel generators as a source of emergency power, are also OPERABLE, and that at least two auxiliary feedwater pumps are OPERABLE.

This requitement is intended to provide assurance that a loss-of-offsite power event will not result in a complete loss of safety function of critical systems during the period one of the diesel generators is inoperable.

The term, verify, as used in this context Neans to administratively check by examining logs or other information to determine if certain components are out-of-service for aaintenance or other reasons.

It does not mean to perform the surveillance i'equirements needed to demonstrate the OPERABILITY of the component.

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 instrumentation and control capability is available for Nonitoring and maintaining the facility status.

The design of the 125-volt D.C. distribution system is such that a battery can have associated with it a full capacity charger powered from it associated 480-volt vital bus or an alternate full capacity charger powered from another 480-volt vital bus.

Technical Specification 3.8.2.1 ACTION c. limits operation in the latter configuration to 14 days.

Technical Specification 3.8.3.1 re-quires either charger be OPERABLE.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory DIABLO CANYON - UNITS 1 5 2 B 3/4 8-1 Amendment Nos.

6 and 4

except for the allowed outage time associated with Action Statement

b. of Specification 3.8.1.1.

This allowed outage time was changed to be consistent with the recommendation of Diablo Canyon Power Plant Diesel Generator Allowed Outage Time Study, May 1989.

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